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Journal articles on the topic 'MgO.Al2O3 .SiO2 system'

Author: Grafiati
Published: 5 June 2025
Last updated: 15 July 2025

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1

Zhang, G. H., K. C. Chou, and X. Y. Lv. "Influences of different components on viscosities of CaO-MgO-Al2O3-SiO2 melts." Journal of Mining and Metallurgy, Section B: Metallurgy 50, no. 2 (2014): 157–64. http://dx.doi.org/10.2298/jmmb130819016z.

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The present study is aimed to distinguish the different influences of CaO and MgO, as well as Al2O3 and SiO2 on viscosity of CaO-MgO-Al2O3-SiO2 melts. It is found that for melt without Al2O3, viscosity increases monotonously as CaO is gradually replaced by MgO. The addition of Al2O3 leads to a complex variation of viscosity. In different composition ranges, viscosity may exhibit different variation tendencies as changing the relative contents of CaO and MgO while keeping contents of other components constant. It is also found that when replacing SiO2 by equivalent mole of Al2O3, (i) in CaOAl 2
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2

Mao, Huahai, Olga Fabrichnaya, Malin Selleby, and Bo Sundman. "Thermodynamic assessment of the MgO–Al2O3–SiO2 system." Journal of Materials Research 20, no. 4 (2005): 975–86. http://dx.doi.org/10.1557/jmr.2005.0123.

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Thermodynamic properties of the phases in the MgO–Al2O3–SiO2 system were assessed, resulting in a set of self-consistent thermodynamic data. The two ternary compounds, cordierite and sapphirine, were optimized from subsolidus reactions. The liquid phase was described by the ionic two-sublattice model with a new species AlO2−1, yielding the formula (Al+3,Mg+2)P(AlO2−1,O−2,SiO4−4,SiO20)Q. Projection of the liquidus surface was calculated. Various isothermal and isoplethal sections were compared with the experimental data.
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3

Liu, Li Xia, Gang Wang, Shi Jun Wang, Yun Chi Dong, and Yi Fan Chai. "Calculation of Phase Diagram of CaO-SiO2-Al2O3-MgO-B2O3 Refining Slag without CaF2." Advanced Materials Research 512-515 (May 2012): 1558–63. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1558.

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CaF2 is used in large quantity during refining of steel, which is harmful to environment to be found. There is more and more study on use of B2O3 in metallurgical progress. This paper studied the effects of MgO on melting performance of CaO-SiO2-Al2O3 ternary system and B2O3 on that of CaO-SiO2-Al2O3-MgO quaternary system by calculation of phase diagram. The result shows that MgO can expand the range of liquid phase of CaO-SiO2-Al2O3 ternary system while the effect on melting performance is little. B2O3 can also reduce the melting point of CaO-SiO2-Al2O3-MgO quaternary system in high CaO zone
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4

Li, Wen Ping, Jun Hong Chen, Christoph Wohrmeyer, Hong Yan Guan, and Jia Lin Sun. "Study on Melting Properties of CaO-Al2O3-SiO2-MgO System Calcium Aluminate Flux." Advanced Materials Research 683 (April 2013): 569–72. http://dx.doi.org/10.4028/www.scientific.net/amr.683.569.

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Melting properties of CaO-Al2O3-SiO2-MgO system calcium aluminate (CA) flux were investigated through orthogonal design on three levels of four factors (content of CaO, Al2O3, SiO2 and MgO, respectively) to explore a reasonable chemical composition of CA flux. Results show that the softening temperature (Ts), hemispherical temperature (Th) and flowing temperature (Tf) of CA flux are influenced by the flux components in the order of SiO2 > MgO > CaO > Al2O3. The optimal chemical composition of flux is 3 wt.% SiO2, 6~12 wt.% MgO, 45 wt.% CaO and 40 wt.% Al2O3. Additionally, mineralogy c
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5

Liao, Jinfa, Gele Qing, and Baojun Zhao. "Phase Equilibria Studies in the CaO-MgO-Al2O3-SiO2 System with Al2O3/SiO2 Weight Ratio of 0.4." Metals 13, no. 2 (2023): 224. http://dx.doi.org/10.3390/met13020224.

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With the raw materials for ironmaking becoming increasingly complex, more accurate phase equilibrium information on the slag is needed to refine the blast furnace operation to reduce the energy cost and CO2 emissions. CaO–SiO2–Al2O3–MgO is a basic system of ironmaking slag in which CaO and MgO mainly come from the flux, SiO2 and Al2O3 are mainly from raw materials. The effect of flux additions on the phase equilibrium of the slag can be described by a pseudo-ternary system CaO–MgO–(Al2O3+SiO2) at a fixed Al2O3/SiO2 ratio of 0.4. Liquidus temperatures and solid solutions in the CaO–MgO–Al2O3–Si
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Yu, Huixiang, Dexin Yang, Muming Li, and Ming Pan. "Metallurgical characteristics of refining slag used for high manganese steel." Metallurgical Research & Technology 116, no. 6 (2019): 620. http://dx.doi.org/10.1051/metal/2019050.

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High manganese steel has excellent mechanical properties, which has garnered much attention. Whereas the research on the refining slag used for high Mn steel is very limited. In this study, the metallurgical characteristics of refining slag for high Mn steel were investigated based on thermodynamic calculation with FactSage 6.3 and slag-metal equilibrium reaction in MgO crucible. The calculated liquid zones of T ≤ 1873 K of CaO-SiO2-Al2O3-8%MgO-5%MnO system are located in the middle region of pseudo-ternary CaO-SiO2-Al2O3. For CaO-SiO2-Al2O3-8%MgO-MnO system, the apparent liquid zone at 1873 K
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7

Cao, Jianqi, Yao Li, Wanming Lin, et al. "Assessment of Inclusion Removal Ability in Refining Slags Containing Ce2O3." Crystals 13, no. 2 (2023): 202. http://dx.doi.org/10.3390/cryst13020202.

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The elimination of inclusions in steelmaking processes has been widely studied. The removal of inclusions by slags containing the rare earth oxide Ce2O3 are studied using an integrated numerical model. The integrated model involves the inclusion motion model, interfacial tension calculation model, surface tension calculation model of slag, and the mass action concentration model, based on ion and molecule coexistence theory. The motion behaviors of both solid Al2O3 inclusions and 50%wtAl2O3–50%wtCaO liquid inclusions of varied sizes at CaO-Ce2O3-SiO2-Al2O3(-MgO) slag systems are evaluated. The
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Wang, Nan, Zong Shu Zou, Zhan Zhang, Yan Ping Xiao, and Yong Xiang Yang. "Thermodynamics of Slag Formation in Multi-Component Oxide Systems in Thermal Processing of Incineration Bottom Ash - Equilibrium Phase Relation in CaO-SiO2-FeOx-MgO System." Advanced Materials Research 194-196 (February 2011): 2175–78. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.2175.

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Vitrification is considered as an attractive procedure for municipal solid waste incineration ash, which can realize the volume reduction and innocent treatment of incineration ash, as well as reuse of bottom ash. The main oxide components of molten ash slag are CaO, Al2O3, SiO2, Fe2O3, MgO, and Na2O, accounting for more than 90% of the total mass. The phase relations and thermodynamic properties of the CaO-Al2O3-SiO2-FeOx-MgO-Na2O oxide system is highly required, and is of great significance for optimization of vitrification processing and sustainable resource utilization of melting slag. A s
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9

Liao, Jinfa, Gele Qing, and Baojun Zhao. "Phase Equilibrium Studies in the CaO–SiO2–Al2O3–MgO System with MgO/CaO Ratio of 0.2." Metallurgical and Materials Transactions B 54, no. 2 (2023): 793–806. http://dx.doi.org/10.1007/s11663-023-02726-3.

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AbstractWith the raw materials for ironmaking are becoming increasingly complex, more accurate control of blast furnace operation is essential to reduce the energy cost and CO2 emission. CaO–SiO2–Al2O3–MgO is a basic system of ironmaking slag in which CaO and MgO are mainly come from the flux, SiO2 and Al2O3 are mainly from the raw materials. Effect of raw material composition on phase equilibrium of the slag can be described by a pseudo-ternary system (CaO + MgO)–SiO2–Al2O3 at a fixed MgO/CaO ratio of 0.2. High-temperature experiments have been carried out in this system, and the quenched sam
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10

Lin, Yue, Yuanrong Yi, Minghang Fang, Wenqing Ma, and Wei Liu. "Prediction Model for SiO2 Activity in the CaO-Al2O3-SiO2-MgO Quaternary Slag System." Minerals 13, no. 4 (2023): 509. http://dx.doi.org/10.3390/min13040509.

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Activity models based on the ion and molecule coexistence theory have been widely used in the refining of metallurgical slags, with the SiO2 content of slag playing a crucial role in improving the mechanical properties of refining slag-based cementitious materials. In order to improve the reactivity of SiO2 in slag, this study established a SiO2 activity prediction model for the CaO-Al2O3-SiO2-MgO quaternary slag system based on the ion and molecule coexistence theory, validating the prediction results using reference values from the literature. Following this, the effects of w(SiO2), w(CaO),
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11

Yuelin, Qin, Liu Hao, and Yang Yanhua. "Structure evolution of blast furnace slag with high Al2O3 Content and 5 mass% TiO2 via molecular dynamics simulation and fourier transform infrared spectroscopy." Metallurgical Research & Technology 115, no. 1 (2017): 113. http://dx.doi.org/10.1051/metal/2017090.

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The structure of a quenched blast furnace slag containing 5 mass% TiO2 was investigated via molecular dynamics simulation and Fourier transform infrared spectroscopy. The simulation and experimental results obtained revealed that the slag possesses a depolymerized network of [SiO4] and [AlO4] tetrahedra. At a fixed CaO/SiO2 mass fraction of 1.17 and 12 mass% Al2O3, increasing the amount of MgO decreased the bridging oxygen fraction in the slag system, thus resulting in silicate depolymerization. At a fixed CaO/SiO2 mass fraction of 1.17 and 8 mass% MgO, increasing Al2O3 content increased the b
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12

Yu, Huixiang, Xinhua Wang, Jing Zhang, and Wanjun Wang. "Laboratory Study on Oxide Inclusions in High-Strength Low-Alloyed Steel Refined by Slag with Basicity 2–5." High Temperature Materials and Processes 34, no. 7 (2015): 675–82. http://dx.doi.org/10.1515/htmp-2014-0116.

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Abstract Non-metallic inclusions in high-strength low-alloyed steel refined by slag with basicity (B) 2–5 and Al2O3 content 20%–30% (in mass percent) were investigated by slag–metal equilibrium experiments in laboratory and thermodynamic calculations. Most inclusions in equilibrium were quasi-spherical CaO-MgO-Al2O3-SiO2 system and the sizes were less than 5 µm. The average content ratio, CaO/Al2O3 and CaO/SiO2 of the inclusions, increased with slag basicity increasing when Al2O3 content in slag was around 25%, MgO/Al2O3 and CaO/Al2O3 increased with Al2O3 content in slag decreasing when slag b
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13

Talapaneni, Trinath, Natraj Yedla, and Smarajit Sarkar. "Study on desulfurization capacity of high alumina blast furnace slag at 1773 K using slag-metal equilibrium technique." Metallurgical Research & Technology 115, no. 5 (2018): 502. http://dx.doi.org/10.1051/metal/2018018.

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In the current paper, we have determined the desulfurization ability of a CaO–MgO–SiO2–Al2O3 slag system using slag-metal equilibrium technique. The chemical composition of slag samples consists of Al2O3 in the range of 25–30 wt%, CaO/SiO2 ratio (0.8–1.6) and MgO (8–16 wt%). All the experiments are conducted at a temperature of 1773 K. The sulphur content in the slag as well as in metal after desulfurization reaction is analyzed using XRF (X-ray Fluorescence Spectroscopy) for calculating sulphur partition ratio (LS) of the slags. The influence of Al2O3, CaO/SiO2 ratio and MgO content on LS hav
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14

Guo, Jia Meng, Ke Wu Peng, Lei Yi, He Li Ma, and Ren Chen. "Study on Properties of Al2O3 -CaO-SiO2-CaF2-MgO Slag System." Applied Mechanics and Materials 513-517 (February 2014): 24–27. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.24.

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Liquidus temperature, electrical conductivity and phase composition of Al2O3-CaO-SiO2-CaF2-MgO slag system were studied. The results showed that the liquidus temperature of the slag decreased with increasing MgO content, and its electrical conductivity increased with increasing MgO content and temperature. When the content of MgO is 5 %, the main phase compositions of the slag are composed of MgAl2O4, Ca2SiO2F2, CaAl4O7 and Ca5Al6O14. When the content of MgO is 7 %, the main phase compositions of Al2O3-CaO-SiO2-CaF2-MgO are composed of MgAl2O4, Ca4Si2O7F2, CaAl4O7 and Ca5Al6O14.And the content
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15

Ju, Jian Tao, Sen Yang, Yan Ping Guo, Yuan She, and Zhao Hui Zhang. "Influence of Top Slag on the Plasticity of CaO-SiO2-Al2O3 Inclusions in 42CrMoA Crankshaft Steel." Materials Science Forum 804 (October 2014): 285–88. http://dx.doi.org/10.4028/www.scientific.net/msf.804.285.

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In order to control the plasticity of CaO-SiO2-Al2O3system inclusions so as to reduce the harm to the quality of 42CrMoA crankshaft steel, the target controlling ranges of CaO-SiO2-Al2O3inclusions is put forward. On the basis, influence of CaO-SiO2-Al2O3and CaO-SiO2-Al2O3-MgO system top slag on the content of calcium and aluminum in molten steel is contrasted. Theoretical research results show that, calcium activity should be controlled in the range of (90~3300)×10-10, oxygen activity should be below 7×10-6, the mass percent of calcium should be controlled more than 75ppm. And CaO-SiO2-Al2O3-M
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16

Hasegawa, M., T. Hayashi, T. Sasaki, and M. Iwase. "Activities of FexO in Na2O-Al2O3-SiO2-FexO Homogeneous Liquid Slags at 1673 K." High Temperature Materials and Processes 31, no. 4-5 (2012): 415–20. http://dx.doi.org/10.1515/htmp-2012-0076.

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AbstractElectrochemical measurements of the solid-oxide galvanic cell of the type Mo/Mo + MoO2/ZrO2 (MgO)/Fe + {Na2O-Al2O3-SiO2-FexO} slag/Ag/Fe were conducted at 1673 K in order to obtain the activities of FexO in Na2O-Al2O3-SiO2-FexO system. The iso-activity curves for FexO at 1673 K were determined for Na2O-(Al2O3 + SiO2)-FexO pseudo-ternary slags with an Al2O3/SiO2 molar ratio of 33/67.
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17

Cao, Ruihong, Shengtao Qiu, Ting Wu, and Haijun Wang. "Performance Study of CaO-CaF2- and CaO-Al2O3-SiO2-Based High-Efficiency Desulfurizers." Metals 15, no. 5 (2025): 550. https://doi.org/10.3390/met15050550.

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In order to reduce the content of harmful impurity sulfur elements in steel to meet the quality requirements of high value-added steel, efficient desulfurization of RH vacuum degassing is essential. Based on the simplex lattice composition design method, the effects of typical compositions on liquidus temperature, sulfur capacity, melting temperature, the effects of typical compositions on liquidus temperature, sulfur capacity, melting temperature, viscosity, and desulfurization rate of CaO-CaF2- and CaO-Al2O3-SiO2-based desulfurizers were studied by thermodynamic calculation, the melting temp
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18

Haghdani, Shokouh, Merete Tangstad, and Kristian Etienne Einarsrud. "Studying the Structure and Viscosity of MnO-SiO2-CaO-Al2O3-MgO Slag System." Materials 17, no. 15 (2024): 3789. http://dx.doi.org/10.3390/ma17153789.

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The relationship between slag structure and viscosity is studied, employing Raman spectroscopy for the five-component slag system of MnO-SiO2-CaO-Al2O3-MgO and its subsystems. This study aims to investigate the influence of variations in slag composition on viscosity, which is crucial for optimizing industrial processes. Based on industrial slag compositions produced in a silicomanganese submerged arc furnace, 17 slags with a fixed content of MnO of 10 wt% are synthesized with varying contents of SiO2 of 33 to 65 wt%; CaO within the range of 14 to 40 wt%; and fixed contents of Al2O3 and MgO of
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19

Li, Tingle, Changyu Sun, Sunny Song, and Qi Wang. "Roles of MgO and Al2O3 on the Viscous and Structural Behavior of Blast Furnace Primary Slag, Part 1: C/S = 1.3 Containing TiO2." Metals 9, no. 8 (2019): 866. http://dx.doi.org/10.3390/met9080866.

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This research provides fundamental insight into the roles of MgO and Al2O3 on the viscous and structural behaviors of CaO−SiO2−MgO−Al2O3−10 mass% TiO2−5 mass% FeO (CaO/SiO2 = 1.3) system primary blast furnace slag. The slag viscosity is measured by the rotating cylinder method, which is essential to the efficient and stable operation of a blast furnace. The network structure characterization of the quenched vitreous samples was conducted using Fourier Transformation Infrared (FTIR) and Raman spectroscopy. Unusual viscous behaviors (that the slag viscosity and the activation energy decrease or
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20

Zhang, Zhan, Guang Qiang Li, Yong Xiang Yang, and Yan Ping Xiao. "Thermodynamics of the Vitrified Bottom Ash Slag from Municipal Solid Waste Incinerators-Phase Relations of CaO-SiO2-Na2O Oxide System." Advanced Materials Research 881-883 (January 2014): 574–78. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.574.

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Vitrification is considered to be an attractive technology for municipal solid waste incineration. The main components of the vitrified bottom ash slag are SiO2, CaO, Al2O3, Fe2O3, Na2O and MgO, accounting for more than 90% of the total mass. The phase relations and thermodynamic properties of the CaO-Al2O3-SiO2-FeOx-MgO-Na2O oxide system is highly required, and is of great significance for optimization of vitrification processing and sustainable resource utilization of melting slag. Thermodynamic properties of the vitrified bottom ash slag were investigated in the present work. A study on the
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21

Zhao, Shuo, Zushu Li, Renze Xu, Darbaz Khasraw, Gaoyang Song, and Dong Xu. "Dissolution Behavior of Different Inclusions in High Al Steel Reacted with Refining Slags." Metals 11, no. 11 (2021): 1801. http://dx.doi.org/10.3390/met11111801.

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Al2O3, Al2O3·TiN, Al2O3·MgO, and CaO·2Al2O3 are four different types of inclusions in high Al steels. To improve the steel cleanness level, the effective removal of such inclusions during secondary refining is very important, so these inclusions should be removed effectively via inclusion dissolution in the slag. The dissolution behavior of Al2O3, Al2O3·TiN, Al2O3·MgO, and CaO·2Al2O3 in CaO-SiO2-Al2O3-MgO slags, as well as the steel-slag reaction, was investigated using laser scanning confocal microscopy (LSCM) and high-temperature furnace experiments, and thermodynamic calculations for the in
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22

Wang, Nan, Zong Shu Zou, Zhan Zhang, Yan Xiao, and Yong Yang. "Effect of Oxygen Partial Pressure and Temperature on Liquidus for the CaO-SiO2-FeOx-Al2O3 System." Advanced Materials Research 295-297 (July 2011): 2279–82. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.2279.

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To provide essential data for an efficient utilization of vitrified bottom ash slag, the thermodynamic properties of the CaO-Al2O3-SiO2-FeOx-MgO-Na2O oxide system is highly required. As one of the related oxide subsystems, the equilibrium phase relations and liquidus of CaO-SiO2-FeOx-Al2O3 system is of great significance to interpret and predict the thermodynamic properties in multi-component oxide systems. In this paper, phase diagrams for the CaO-Al2O3-FeOx and SiO2-Al2O3-FeOx systems were calculated by using CALPHAD method with FactSage program. The liquid phase area changed with changing o
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23

Guo, Zhijie, Yanhui Sun, Hongyu Wang, Chao Zhuo, and Huajie Wu. "Effect of ladle lining system refractories on the cleanliness of heavy-rail steel U75V." Metallurgical Research & Technology 120, no. 6 (2023): 612. http://dx.doi.org/10.1051/metal/2023076.

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To understand the effect of refractories in the ladle lining system on the evolution of inclusions in the secondary refining process, refractory samples were taken from different locations in the ladle system (Slag lining bricks, Sidewall bricks, Refractory mortar, and Bottom bricks). Laboratory experiments were carried out using heavy-rail steel slab samples (Si-Mn-killed steel) and different refractory bricks. The four kinds of refractory bricks can be roughly divided into 3 categories: (1) MgO-Al2O3-C system (MAC, high MgO>55%); (2) Al2O3-MgO-C system (AMC, low MgO<13%); (3) Al2O3-SiO
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24

Amista, P., M. Cesari, A. Montenero, G. Gnappi, and Luo Lan. "Crystallization behaviour in the system MgOAl2O3SiO2." Journal of Non-Crystalline Solids 192-193 (December 1995): 529–33. http://dx.doi.org/10.1016/0022-3093(95)00451-3.

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25

Kozlov, V. V., L. M. Aksel’rod, A. I. Dagman, and A. S. Timokhin. "Application of the methodology for modeling thesubsolidus phase composition within the framework of multicomponent oxide systems for controlling the slag regime of oxygen converter melting." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 4 (December 3, 2024): 3–7. https://doi.org/10.17073/1683-4518-2024-4-3-7.

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A theoretical study of the subsolidus phase structure of multicomponent oxide systems CaO‒MgO‒Al2O3‒SiO2‒FeO‒Fe2O3 and CaO‒MgO‒Al2O3‒SiO2‒MnO‒TiO2 has been carried out. The separation of the CaO‒MgO‒Al2O3‒SiO2‒MnO‒TiO2 system into ensembles of mutually coexisting phases using the concept of optical basicity of oxide compounds is proposed. A technique for modeling the equilibrium phase composition within these systems based on their subsolidus phase structure is proposed. This technique is the basis for estimating the liquidus temperature and determining the areas of primary crystallization of
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26

Guo, Yongchun, Fengman Shen, Haiyan Zheng, Shuo Wang, Xin Jiang, and Qiangjian Gao. "Desulfurization Ability of Blast Furnace Slag Containing High Al2O3 at 1773 K." Crystals 11, no. 8 (2021): 910. http://dx.doi.org/10.3390/cryst11080910.

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With the consumption of high-quality iron ore resources, the grade of iron ore raw used in the iron making process has gradually decreased. The high aluminum raw materials has led to an increase in the Al2O3 content in the blast furnace slag, which has affected the normal operation of the blast furnace. The activity of the components involved in the desulfurization reaction is an important factor affecting the desulfurization process. In this paper, the effects of B(w(CaO)/w(SiO2)) and w(MgO)/w(Al2O3) on the desulfurization ability of a CaO-SiO2-MgO-Al2O3 quaternary blast furnace slag system w
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27

Wang, Xi Tang, Chen Ze Luo, and Bao Guo Zhang. "Solution Behavior of CaO-MgO-SiO2 System Bio-Soluble Refractory Ceramic Fibers." Key Engineering Materials 336-338 (April 2007): 1556–58. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.1556.

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In order to assess the behavior of ceramic fibers that are respired and accumulate in the lung, the solubility of bio-soluble CaO-MgO-SiO2 system ceramic fibers was determined by measuring the concentrations of the main components in the Gamble solution after different solution periods. The effect of ZrO2, TiO2, B2O3, Al2O3 and the different CaO/MgO ratio of fibers on the solubility of the ceramic fibers were investigated. The results indicated that the pH value of the Gamble solutions increase with the increasing of solution time. CaO, MgO, SiO2 in the ceramic fiber have greater solubility. T
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Suvorov, Stanislav A., Vladimir V. Kozlov, and Sergey M. Philippov. "MODEL OF MELTING METALLURGICAL SLAGS IN CaO-MgO-Al2O3-SiO2 SYSTEM." Bulletin of the Saint Petersburg State Institute of Technology (Technical University) 37, no. 63 (2016): 3–7. http://dx.doi.org/10.15217/issn1998984-9.2016.37.3.

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29

Zaichuk, Oleksandr, Aleksandra Amelina, Yuliia Kalishenko, and Yurii Hordieiev. "Determining patterns in the formation of cordierite phase during the synthesis of density-sintered low-temperature ceramics based on glasses of the MgO–Al2O3–SiO2 system." Eastern-European Journal of Enterprise Technologies 6, no. 6 (120) (2022): 51–59. http://dx.doi.org/10.15587/1729-4061.2022.268140.

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The search for effective modifiers of the structure of densely baked cordierite ceramics to reduce the firing temperature is a relevant task but typically requires a large amount of experimental research. The object of this study is the reaction of the formation of the cordierite phase with the participation of glass components of the eutectic compositions of the MgO– Al2O3–SiO2 system under low-temperature firing conditions. In this case, thermodynamic analysis was used as a tool to assess the probability of chemical reactions. Thermodynamic analysis can significantly reduce the volume of the
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30

Yu, Huixiang, Dexin Yang, Muming Li, and Ni Zhang. "Effect of CaO–SiO2–Al2O3–MgO top slag on solute elements and non-metallic inclusions in Fe-xMn(x = 10, 20 mass pct) steel." Metallurgical Research & Technology 118, no. 3 (2021): 302. http://dx.doi.org/10.1051/metal/2021025.

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Medium/high manganese steels have broad application prospects in automotive industry, cryogenic material, etc. because of excellent properties. Precise control on steel composition and improvement of cleanliness are very important for commercial production of these steel grades. In this study, the effect of CaO–SiO2–Al2O3–MgO slag on solute elements and inclusions of Fe-xMn(x = 10, 20 mass pct) steel was studied and discussed. After slag/steel reaction, the concentration of Mn and S in steel reduced, while Si increased. Most MnO type inclusions, which were the main inclusions in master high ma
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Miao, Xi Geng, Fabrizia Ghezzo, Jing Jing Liu, Zhi Ya Zhao, and Ruo Peng Liu. "Use of a Dielectric Glass to Join Dielectric Ceramics for Microwave Filters." Advanced Materials Research 787 (September 2013): 316–21. http://dx.doi.org/10.4028/www.scientific.net/amr.787.316.

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Joining of ceramics with glasses has been widely used for artificial teeth, solid oxide fuel cells, electrical devices, high temperature ceramic filters, structural ceramic components for aeronautic engineering, nuclear reactors, and other applications. This study aimed to explore the possibility of using a dielectric glass to connect a dielectric ceramic resonator to a dielectric ceramic support, in order to make miniaturized microwave filters characterized by higher temperature and environmental stability and low dielectric loss. A mixed powder having Bi2O3-SiO2-Al2O3-MgO-ZnO-CaO glass as a
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32

Jung, In-Ho, Sergei A. Decterov, and Arthur D. Pelton. "Critical thermodynamic evaluation and optimization of the MgO-Al2O3, CaO-MgO-Al2O3, and MgO-Al2O3-SiO2 Systems." Journal of Phase Equilibria and Diffusion 25, no. 4 (2004): 329–45. http://dx.doi.org/10.1007/s11669-004-0151-4.

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33

Babenko, A. A., S. A. Istomin, E. V. Protopopov, A. V. Sychev та V. V. Ryabov. "VISCOSITY OF СaО – SiO2 – Al2O3 – MgO – B2O3 SLAG SYSTEM". Izvestiya Visshikh Uchebnykh Zavedenii. Chernaya Metallurgiya = Izvestiya. Ferrous Metallurgy 57, № 2 (2015): 41. http://dx.doi.org/10.17073/0368-0797-2014-2-41-43.

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34

Gasparik, Tibor. "A Petrogenetic Grid for the System MgO-Al2O3-SiO2." Journal of Geology 102, no. 1 (1994): 97–109. http://dx.doi.org/10.1086/629650.

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35

Zheng, Haiyan, Shifa Zhou, Shen Zhang, et al. "Viscosity Estimation of TiO2-Bearing Blast Furnace Slag with High Al2O3 at 1500 °C." Metals 13, no. 3 (2023): 573. http://dx.doi.org/10.3390/met13030573.

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Slag compositions are significant for the viscosity of blast furnace slag. An improved Urbain model (IUM) was proposed by introducing R5 ((X(CaO) + X(MgO) + 2X(TiO2))/(2X(SiO2) + 3X(Al2O3))) and N (X(MgO)/3X(Al2O3)) as the model parameters. By comparing IUM with other models, the model parameters of R5 and N are more reasonable and suitable for TiO2-bearing blast furnace slag, and IUM for predicting viscosity has a higher precision, and its relative error is only 10%. The viscosity isolines of the CaO–SiO2–15%Al2O3–MgO–2.5% TiO2 system were plotted, and the results show that the viscosity cent
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36

Fabrichnaya, O., A. Costa e Silva, and F. Aldinger. "Assessment of thermodynamic functions in the MgO–Al2O3–SiO2 system." International Journal of Materials Research 95, no. 9 (2004): 793–805. http://dx.doi.org/10.1515/ijmr-2004-0148.

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Abstract The Kapoor-Frohberg cell model and two-sublattice ionic liquid model were used to describe liquid phase in the system MgO–Al2O3–SiO2. Solid solution phases were described by the compound energy formalism. Two data sets have been created based on the same description of solid phases and different models of liquid. It is shown that both models of liquid reproduce experimental data in binary systems very well. Thermodynamic parameters of ternary compounds cordierite and sapphirine were assessed from subsolidus reactions. The liquidus surface for the MgO–Al2O3–SiO2 system is calculated fo
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Zhang, Pei Xin, Li Gao, Qiu Hua Yuan, Hai Lin Peng, Xiang Zhong Ren, and Dong Yun Zhang. "Crystallization Behavior and Performance of MgO-Al2O3-SiO2 Glass-Ceramics by Sintering." Advanced Materials Research 92 (January 2010): 65–71. http://dx.doi.org/10.4028/www.scientific.net/amr.92.65.

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The glass-ceramics of MgO-Al2O3-SiO2 system were prepared by sintering technology. The crystallization process of MgO-Al2O3-SiO2 glass-ceramics was investigated with X-ray diffraction (XRD), scanning electron microscopy (SEM), and other techniques; the discussion of breaking strength, thermal expansion coefficient and relevant properties at different sintering temperatures was also presented. The results show that: (1) The main crystalline phase isα-cordierite at different sintering temperatures, and the samples show high flexural strength and low thermal expansion coefficient; (2) with the in
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38

Hu, Xinguang, Fengman Shen, Haiyan Zheng, Yongchun Guo, Xin Jiang, and Qiangjian Gao. "Effect of melt structure property on Al2O3 activity in CaO-SiO2-Al2O3-MgO system for blast furnace slag with different Al2O3 content." Metallurgical Research & Technology 118, no. 5 (2021): 515. http://dx.doi.org/10.1051/metal/2021076.

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With the shortage of high-quality iron ore resources, more and more attention has been paid to the blast furnace (BF) smelting of Al2O3-rich iron ore in recent years. Thus, investigation on the thermodynamics property of Al2O3-rich blast furnace slag was inevitable in order to produce high quality hot metal with low cost. In this paper, based on the determination of Al2O3 activity by reference slag method at 1873 K in previous study, the effect of the mechanism of slag structure property on Al2O3 activity in CaO-SiO2-MgO-Al2O3 system was discussed by Raman spectra analysis. It was found that t
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39

Kim, Youngjae, and Dong-Joon Min. "Viscosity and Structural Investigation of High-Concentration Al2O3 and MgO Slag System for FeO Reduction in Electric Arc Furnace Processing." Metals 11, no. 8 (2021): 1169. http://dx.doi.org/10.3390/met11081169.

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In the present study, the viscosity of the CaO–SiO2–FeO–Al2O3–MgO slag system was measured for the recovery of FeO in the electric arc furnace (EAF) process using Al dross. Considering the MgO-saturated operational condition of the EAF, the viscosity was measured in the MgO-saturated composition at 1823 K with varying FeO and Al2O3 concentrations. An increase in the slag viscosity with decreasing temperature was observed. The activation energy was evaluated, and the change in the thermodynamically equilibrated phase was considered. The changes in the aluminate structure with varying FeO and Al
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40

Ilin, A. A., I. A. Pikalova, and N. N. Zobnin. "Study of boron distribution between silicon and slags of CaO-SiO<sub>2</sub>, MgO-SiO<sub>2</sub>, CaO-MgO-SiO<sub>2</sub>, and CaO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> systems under reducing conditions." iPolytech Journal 28, no. 2 (2024): 371–85. http://dx.doi.org/10.21285/1814-3520-2024-2-371-385.

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We study the distribution of boron between silicon and slag of the CaO-SiO2, MgO-SiO2, CaO-MgO-SiO2, and CaO-Al2O3-SiO2 systems under reducing conditions with the purpose of determining the feasibility of using boroncontaining materials to eliminate slagging in the melting zone during industrial silicon smelting in ore smelting furnaces. To that end, we used model slags obtained by melting chemically pure oxides, as well as silicon-based alloys with an admixture of boron. High-purity 5N silicon produced by Kazakhstan Solar Silicon LLP was used. Boron alloys were manufactured independently by m
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41

Evstropiev, S. K., V. L. Stolyarova, D. V. Bulyga, A. S. Saratovskii, N. B. Knyazyan, and G. G. Manukyan. "Intensification of sol-gel synthesis of Mn-containing MgO-Al2O3-ZrO2-SiO2 system materials." Scientific and Technical Journal of Information Technologies, Mechanics and Optics 25, no. 3 (2025): 387–95. https://doi.org/10.17586/2226-1494-2025-25-3-387-395.

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Glass and glass-crystalline MgO-Al2O3-SiO2 system materials have many practical applications including their use as luminophores. To lower the synthesis temperature of such materials is an actual task. In this work, Mn-containing materials of MgO-Al2O3-ZrO2-SiO2 system were synthesized by sol-gel method. The analytical chemical composition, crystal structure, morphology and luminescence spectra were investigated by X-ray phase analysis, scanning electron microscopy, energy dispersive analysis and luminescence spectroscopy. It was found that the introduction of fluoride component into sols sign
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42

Zhu, Hangyu, Jixuan Zhao, Jianli Li, Qian Hu, and Chenxi Peng. "Evolution of nonmetallic inclusions in pipeline steel during LF and VD refining process." High Temperature Materials and Processes 39, no. 1 (2020): 424–32. http://dx.doi.org/10.1515/htmp-2020-0088.

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AbstractThe formation and evolution of nonmetallic inclusions in pipeline steel were investigated by SEM, EDS and INCA Feature Analysis System, with the industrial process of electric arc furnace → ladle furnace (LF) refining → vacuum degassing → continuous casting. The composition, size and amount of inclusions during refining process were discussed systematically. The results show that inclusions at each refining step are mainly small-particle inclusions (below 5 µm), and the total number of inclusions has been reduced significantly due to the refining effect of slag during LF refining. The
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43

Wang, N., M. Chen, Z. Zou, Z. Zhang, Y. Xiao, and Y. Yang. "Liquidus and phase equilibria in CaO-Al2O3-FeOx-SiO2 system under intermediate oxygen partial pressure." Journal of Mining and Metallurgy, Section B: Metallurgy 49, no. 2 (2013): 139–44. http://dx.doi.org/10.2298/jmmb120826014w.

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Phase equilibria of silicate slags relevant to the copper smelting/converting operations have been experimentally studied over a wide range of slag compositions, temperatures and atmospheric conditions. Selected systems are of industrial interest and fill the gaps in fundamental information required to systematically characterise and describe copper slag chemistry. The experimental procedures include equilibration of synthetic slag at high temperatures, rapid quenching of resulting phases, and accurate measurement of phase compositions using electron probe X-ray microanalysis (EPMA). The effec
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44

Shi, Xiaofang, Yu Wang, Bingjie Wang, and Lizhong Chang. "Effect of Basicity and Al2O3 Content in Slag on Cleanliness of Electroslag Ingot." Metals 13, no. 4 (2023): 642. http://dx.doi.org/10.3390/met13040642.

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In order to clarify the mechanism for the increase in oxygen content during electroslag remelting, this paper analyzes in detail the effect of slag components on the gas content and number, size and composition of inclusions in electroslag ingots. The results show that, when the CaF2-MgF2-CaO-MgO-SiO2 slag system is used for electroslag remelting, the oxygen content in electroslag ingots decreases clearly with the increase in slag basicity. When the basicity is 14~3.3, the oxygen content in electroslag ingots is only 9~11 ppm. When the basicity drops to 2.3, the oxygen content increases to 20
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Shaputra, Ahmad Wahyu, and Rachmawati Apriani. "Effect of Tandem Flocculation Agent System on Lime Mud NPE (Non Process Element)." Eksergi 19, no. 3 (2022): 110. http://dx.doi.org/10.31315/e.v19i3.7893.

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Non Process Element (NPE) is an impurity substance that is not expected to be present in the caustic system because it can cause disruption to the process and affect the product quality. One way to minimize NPE input is through the process of clarifying raw green liquor into clean green liquor using the coagulation-flocculation method with PDADMAC and A-PAM chemicals. The aim of this study is to determine the effect of tandem flocculation agent system on lime mud NPE taking into account the quality standards of several Non Process Element (NPE) compounds in lime mud, as follows : P2O5 &lt;1%,
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46

Liu, Changqing, Zongcheng Ling, Jiang Zhang, Zhongchen Wu, Hongchun Bai, and Yiheng Liu. "A Stand-Off Laser-Induced Breakdown Spectroscopy (LIBS) System Applicable for Martian Rocks Studies." Remote Sensing 13, no. 23 (2021): 4773. http://dx.doi.org/10.3390/rs13234773.

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Laser-induced breakdown spectroscopy (LIBS) is a valuable tool for evaluating the geochemical characteristics of Martian rocks and was applied in the Tianwen-1 Mars exploration mission with the payload called Mars Surface Composition Detection Package (MarSCoDe). In this work, we developed a laboratory standoff LIBS system combined with a Martian simulation chamber to examine the geochemical characteristics of igneous rocks, with the intention to provide a reference and a basis for the analysis of LIBS data acquired by MarSCoDe. Fifteen igneous geological standards are selected for a prelimina
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47

Evstrop'ev, S. K., V. M. Volynkin, A. S. Saratovskiy, et al. "Modification of Quartz Ceramics by Applying a Sol-Gel Composition of MgO–Al2O3–ZrO2–SiO2 System." Журнал прикладной химии, no. 2 (December 15, 2023): 200–208. http://dx.doi.org/10.31857/s0044461823020081.

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Composite sol-gel materials of the MgO–Al2O3–ZrO2–SiO2 system were synthesized and the processes of their thermal evolution and crystallization were studied. Application of sol-gel compositions of the MgO–Al2O3–ZrO2–SiO2 system to the surface of quartz ceramics leads to a significant increase in the mechanical strength of the material. The processes of thermal evolution of the sol-gel composition were studied using IR spectroscopy, X-ray diffraction, electron microscopy, and energy dispersive analysis. It was shown that the formation of the oxide composite structure of materials begins at the
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48

Hong, Chuan, Yun Ming Gao, and Shao Bo Wang. "Application of Optical Basicity for Estimation of Viscosity of SiO2-CaO-MgO-Al2O3 System." Advanced Materials Research 1033-1034 (October 2014): 811–17. http://dx.doi.org/10.4028/www.scientific.net/amr.1033-1034.811.

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A viscosity model based on NPL model with the corrected optical basicity is proposed for quaternary SiO2-CaO-MgO-Al2O3 slag system in the present work. The modified Arrhenius type of equation for temperature dependence of slag viscosity is employed. By means of fitting measured viscosity values for slags with basicity from 0.4 to 1.0 and temperature from 1593 to 1803 K, model parameters are optimized against values of optical basicity, which represents both the structure of molten slags and cationic effects. The relationship between model parameters and optical basicity, which is different fro
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Schirmer, Thomas, Hao Qiu, Haojie Li, Daniel Goldmann, and Michael Fischlschweiger. "Li-Distribution in Compounds of the Li2O-MgO-Al2O3-SiO2-CaO System—A First Survey." Metals 10, no. 12 (2020): 1633. http://dx.doi.org/10.3390/met10121633.

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The recovery of critical elements in recycling processes of complex high-tech products is often limited when applying only mechanical separation methods. A possible route is the pyrometallurgical processing that allows transferring of important critical elements into an alloy melt. Chemical rather ignoble elements will report in slag or dust. Valuable ignoble elements such as lithium should be recovered out of that material stream. A novel approach to accomplish this is enrichment in engineered artificial minerals (EnAM). An application with a high potential for resource efficient solutions is
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50

Kirschen, Marcus. "Visualization of Slag Data for Efficient Monitoring and Improvement of Steelmaking Slag Operation in Electric Arc Furnaces, with a Focus on MgO Saturation." Metals 11, no. 1 (2020): 17. http://dx.doi.org/10.3390/met11010017.

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Frequent slag sampling and analysis is still the most common method used to investigate and improve slag operation in electric arc furnaces (EAFs) for low-alloyed carbon steelmaking. An MgO saturation diagram for EAF slags was derived from phase equilibrium calculations in the system CaO–MgO–FeO–SiO2–5%Al2O3 to provide monitoring and interpretation of the slag data with respect to control of MgO saturation, FeO reduction, dissolution from the MgO-based refractory lining, and unusual losses of repair mixes. Examples from 14 industrial EAFs are given.
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