Journal articles: 'Iron ore fines'

1

Everett, J. E., D. Linden, and P. Maney. "Predicting iron ore fines shipment moisture." Applied Earth Science 122, no. 2 (June 2013): 113–21. http://dx.doi.org/10.1179/1743275813y.0000000034.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Sharma, J., T. Sharma, and N. R. Mandre. "Processing of Goethitic Iron Ore Fines." Journal of The Institution of Engineers (India): Series D 96, no. 2 (May 9, 2015): 143–49. http://dx.doi.org/10.1007/s40033-015-0075-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Du, Wenguang, Song Yang, Feng Pan, Ju Shangguan, Jie Lu, Shoujun Liu, and Huiling Fan. "Hydrogen Reduction of Hematite Ore Fines to Magnetite Ore Fines at Low Temperatures." Journal of Chemistry 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/1919720.

Full text

Abstract:

Surplus coke oven gases (COGs) and low grade hematite ores are abundant in Shanxi, China. Our group proposes a new process that could simultaneously enrich CH4from COG and produce separated magnetite from low grade hematite. In this work, low-temperature hydrogen reduction of hematite ore fines was performed in a fixed-bed reactor with a stirring apparatus, and a laboratory Davis magnetic tube was used for the magnetic separation of the resulting magnetite ore fines. The properties of the raw hematite ore, reduced products, and magnetic concentrate were analyzed and characterized by a chemical analysis method, X-ray diffraction, optical microscopy, and scanning electron microscopy. The experimental results indicated that, at temperatures lower than 400°C, the rate of reduction of the hematite ore fines was controlled by the interfacial reaction on the core surface. However, at temperatures higher than 450°C, the reaction was controlled by product layer diffusion. With increasing reduction temperature, the average utilization of hydrogen initially increased and tended to a constant value thereafter. The conversion of Fe2O3in the hematite ore played an important role in the total iron recovery and grade of the concentrate. The grade of the concentrate decreased, whereas the total iron recovery increased with the increasing Fe2O3conversion.

APA, Harvard, Vancouver, ISO, and other styles

4

Haque, R., H. S. Ray, and A. Mukherjee. "Fluidized Bed Reduction of Iron Ore Fines by Coal Fines." ISIJ International 31, no. 11 (1991): 1279–85. http://dx.doi.org/10.2355/isijinternational.31.1279.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Simões, Carolina, Ronald Rojas, Marcelo Camarate, and Maurício Torem. "Electroflotation of iron ore fines using biosurfactant." IOP Conference Series: Materials Science and Engineering 1196, no. 1 (October 1, 2021): 012015. http://dx.doi.org/10.1088/1757-899x/1196/1/012015.

Full text

Abstract:

Abstract Conventional flotation shows low recovery of the fine particles due to the low probability of bubble-particle adhesion and collision, what can be solved with the electroflotation process. Electroflotation uses oxygen and hydrogen microbubbles (<100µm) generated from water electrolysis. In addition, this process can become a biotechnology using a biosurfactant. The present work aims to evaluate the recovery of hematite fine particles from an iron ore using the electroflotation process with a biosurfactant obtained from Rhodococcus opacus. The tests were conducted with an iron ore (-38+20μm) in a Partridge-Smith modified electroflotation binary cell. The parameters used in these tests were current density (16 mA/cm2), agitation (300rpm), electrolyte concentration (0.2mol/L), conditioning time (5min) and flotation time (10 min). The pH range between 3 and 11, biosurfactant concentration (50 to 800mg/L) were evaluated and up to now, the results show that the electroflotation process was able to concentrate the hematite of the iron ore.

APA, Harvard, Vancouver, ISO, and other styles

6

Umadevi, Tekkalakote, Komala Sivanna Sridhara, Munukuntla Raju, P. Karthik, Rameshwar Sah, Maribasappanavar Basavaraja, and Sanghamesh Desai. "Development of process for reduction in fines generation at direct reduced iron plant by coating of magnetite iron ore fines on hematite iron ore pellets." Metallurgical Research & Technology 119, no. 6 (2022): 604. http://dx.doi.org/10.1051/metal/2022088.

Full text

Abstract:

Iron ore pellet fines generation at direct reduced iron (DRI) plant is ranging from 10 to 12% during handling of the pellets from pellet plant to DRI plant. The generation of fines during handling depends on the quality of the produced pellets, mainly due to the abrasion index (AI) of the pellet. To reduce the generation of pellet fines, detailed laboratory studies have been carried out by coating the hematite iron ore pellet surface with magnetite fines generated from reduction roasting plant, and mixed magnetite fines with limestone fines. The coated green pellets were fired in a rising hearth furnace. The magnetite fines were varied from 0 to 2.5% as coating agent, and limestone fines was varied from 0 to 0.6% as coating agent mixed with magnetite fines. At optimum 1.5% magnetite fines as coating agent achieved better pellet properties and reduced the fines generation from 6.8 to 3.2% due to formation of secondary hematite phases at the pellet shell. With mixed 0.2% limestone and 1.5% magnetite fines reduced pellet fines generation from 6.8 to 4.2%. Reduction in fines generation with mixed fines was due to formation of secondary hematite and Ca-ferrite at the pellet surface. Secondary hematite and Ca ferrite phases having higher micro-hardness compared to other phases of iron ore pellet. The sequence of micro-hardness of the pellet phases is secondary hematite > Ca-ferrite > primary hematite > magnetite. The secondary hematite and Ca-ferrite formed at the pellet surface due to coating of magnetite as well as magnetite with limestone fines improved the overall pellet quality and reduced the generation of fines at DRI plant. Coating of magnetite fines alone showed better pellet properties with lesser fines generation compared to coating of mixed limestone and magnetite fines.

APA, Harvard, Vancouver, ISO, and other styles

7

Wang, Hailong, Junichi Koseki, and Tomoyoshi Nishimura. "Water retention characteristics of iron ore fines." Canadian Geotechnical Journal 57, no. 9 (September 2020): 1427–37. http://dx.doi.org/10.1139/cgj-2018-0840.

Full text

Abstract:

Evaluations of water retention characteristics of typical iron ore fines (IOF) were presented, which was part of experimental works for the estimation of liquefaction potential of IOF heaps. The water retention tests were conducted in a suction range from 0.1 to 106 kPa on two IOFs and two artificial soils with various testing techniques. It is observed that water retention characteristic curves of one IOF (IOF-B) converge in terms of the relationship between suction (S) and water content (w) regardless densities of specimens when S exceeds a threshold value (Sth). Based on this finding, water retention characteristics are divided into density and materials affected zones. It is also found that IOFs generally have higher water retention ability than the two artificial soils, from which discussion is made on the effect of specific surface area and mineralogy on water retention characteristics of IOF. Finally, water retention characteristics are linked to compaction curves, from which, with the consideration that degree of saturation at peaks of compaction curves is relatively constant, a safety margin of a recently proposed regulation for maritime transportation of IOF is discussed.

APA, Harvard, Vancouver, ISO, and other styles

8

Dutta, Sujoy K., and Ahindra Ghosh. "Kinetics of Gaseous Reduction of Iron Ore Fines." ISIJ International 33, no. 11 (1993): 1168–73. http://dx.doi.org/10.2355/isijinternational.33.1168.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Wang, H., J. Koseki, and T. Nishimura. "Permeability of saturated and unsaturated iron ore fines." Japanese Geotechnical Society Special Publication 7, no. 2 (April 30, 2019): 401–9. http://dx.doi.org/10.3208/jgssp.v07.064.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Gajbhiye, Pratima, and Ajita Kumari. "Utilization of Iron ore fines using flocculating reagents." Journal of Physics: Conference Series 1714 (January 2021): 012015. http://dx.doi.org/10.1088/1742-6596/1714/1/012015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Moraes da Gama, Evandro, Matheus Henrique de Castro, Carlos Gomes, and Felipe Abbas da Gama. "Experimental Study of Stockpiles of Iron Ore Fines." Geomaterials 04, no. 01 (2014): 18–26. http://dx.doi.org/10.4236/gm.2014.41003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

SINGH, BIMAL P., L. BESRA, and A. RAVI PRASAD. "Coagulation and Flocculation Study of Iron Ore Fines." Separation Science and Technology 34, no. 5 (January 1999): 743–53. http://dx.doi.org/10.1080/01496399908951142.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

RAY, HEM SHANKER. "Kinetics of Reaction between Iron Ore Fines and Coal or Char Fines." Mineral Processing and Extractive Metallurgy Review 10, no. 1 (March 1992): 139–53. http://dx.doi.org/10.1080/08827509208914081.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Munro, Michael C., and Abbas Mohajerani. "Slope stability evaluation of iron ore fines during marine transport in bulk carriers." Canadian Geotechnical Journal 55, no. 2 (February 2018): 258–78. http://dx.doi.org/10.1139/cgj-2016-0468.

Full text

Abstract:

A commodity, such as iron ore fines, shifting in the hold of a bulk carrier can lead to the vessel listing or capsizing. The objective of this study is to investigate the factors of safety pertaining to slope failure for both untrimmed and trimmed cargoes of iron ore fines during marine transportation. To determine the shear strength parameters needed to perform this analysis, triaxial testing was performed on samples of iron ore fines under varying densities and moisture contents. Using the shear strength parameters of the material, the Morgenstern–Price method of slices and infinite slope analysis, referred to as rotational and translational slope stability analyses, were used to determine the factors of safety against slope failure. The study concludes that, considering a factor of safety of 1.5, an untrimmed cargo of iron ore fines is unstable at angles of heel that bulk carriers are expected to experience during a typical voyage. If the cargo is trimmed it is shown to be significantly more stable. Results support the recommendation that it become mandatory for cargoes of iron ore fines to undergo trimming to reduce the chance of slope failure occurring, which may result in the loss of human life and industry assets.

APA, Harvard, Vancouver, ISO, and other styles

15

MOOKHERJEE, S., A. MUKHERJEE, B. K. DHINDAW, and H. S. RAY. "Reduction of iron ore fines with coal fines by statistical design of experiments." Transactions of the Iron and Steel Institute of Japan 26, no. 2 (1986): 101–6. http://dx.doi.org/10.2355/isijinternational1966.26.101.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Wolfinger, Thomas, Daniel Spreitzer, and Johannes Schenk. "Analysis of the Usability of Iron Ore Ultra-Fines for Hydrogen-Based Fluidized Bed Direct Reduction—A Review." Materials 15, no. 7 (April 6, 2022): 2687. http://dx.doi.org/10.3390/ma15072687.

Full text

Abstract:

This review focuses on the usability of iron ore ultra-fines for hydrogen-based direct reduction. Such technology is driven by the need to lower CO2 emissions and energy consumption for the iron and steel industry. In addition, low operational and capital expenditures and a high oxide yield because of the direct use of ultra-fines can be highlighted. The classification of powders for a fluidized bed are reviewed. Fluid dynamics, such as minimum fluidization velocity, entrainment velocity and fluidized state diagrams are summarized and discussed regarding the processing of iron ore ultra-fines in a fluidized bed. The influence of the reduction process, especially the agglomeration phenomenon sticking, is evaluated. Thus, the sticking determining factors and the solutions to avoid sticking are reviewed and discussed. The essential theoretical considerations and process-relevant issues are provided for the usability of iron ore ultra-fines for hydrogen-based fluidized bed direct reduction.

APA, Harvard, Vancouver, ISO, and other styles

17

Wang, Hailong, Junichi Koseki, Takeshi Sato, and Yukika Miyashita. "Geotechnical properties of a type of iron ore fines." Japanese Geotechnical Society Special Publication 2, no. 14 (2016): 541–46. http://dx.doi.org/10.3208/jgssp.jpn-079.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Vining, Keith Richard, Jasbir Khosa, and Graham J. Sparrow. "Briquetting Conditions for Australian Hematite-Goethite Iron Ore Fines." ISIJ International 57, no. 9 (2017): 1517–23. http://dx.doi.org/10.2355/isijinternational.isijint-2017-052.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Hasan, Md Tariqul, Chenliang Li, Yansong Shen, Aibing Yu, and Runyu Yang. "Finite element analysis of briquetting of iron ore fines." Powder Technology 353 (July 2019): 398–408. http://dx.doi.org/10.1016/j.powtec.2019.05.026.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Donskoi, E., S. P. Suthers, and M. I. Pownceby. "Ultrasonic treatment of high phosphorus Australian iron ore fines." Minerals Engineering 189 (November 2022): 107914. http://dx.doi.org/10.1016/j.mineng.2022.107914.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Pal, Jagannath. "Innovative Development on Agglomeration of Iron Ore Fines and Iron Oxide Wastes." Mineral Processing and Extractive Metallurgy Review 40, no. 4 (October 8, 2018): 248–64. http://dx.doi.org/10.1080/08827508.2018.1518222.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Umadevi, Tekkalakote, Angalakuditi Brahmacharyulu, Ajay Kumar Roy, Pradipta Chandra Mahapatra, Manjunath Prabhu, and Madhu Ranjan. "Influence of Iron Ore Fines Feed Size on Microstructure, Productivity and Quality of Iron Ore Sinter." ISIJ International 51, no. 6 (2011): 922–29. http://dx.doi.org/10.2355/isijinternational.51.922.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Souza, A. S., Pinto Souza, A. M. Sarkis, T. F. Pádua, and R. Béttega. "Energy analysis of the convective drying of iron ore fines." Chemical Industry and Chemical Engineering Quarterly, no. 00 (2022): 26. http://dx.doi.org/10.2298/ciceq220208026s.

Full text

Abstract:

Drying operations in iron ore processing plants have a particularly high energy demand due to the massive solid flow rates employed in this industry. A 33 full-factorial design was applied to investigate the effects of air temperature, airflow velocity, and solids load on the drying time and the specific energy consumption (SEC) of the convective drying of iron ore fines in a fixed bed. The results demonstrated that each drying air condition was associated with an optimal solids load that minimized the SEC. A load of 73 g (bed height of about 0.8 cm) was identified and validated as the optimal condition in terms of energy consumption for the configuration with the highest air temperature (90?C) and airflow velocity (4.5 m/s). This condition resulted in a drying time of 29.0 s and a corresponding SEC of 12.8 MJ/kg to reduce the solids moisture content from 0.11 to a target of 0.05 kg water/kg dry solids. The approach presented here for identifying the optimum values for the process variables should assist in the design and operation of energy efficient convective dryers for iron ore fines.

APA, Harvard, Vancouver, ISO, and other styles

24

Hammam, Abourehab, Yi Cao, Abdel-Hady A. El-Geassy, Mohamed H. El-Sadek, Ying Li, Han Wei, Mamdouh Omran, and Yaowei Yu. "Non-Isothermal Reduction Kinetics of Iron Ore Fines with Carbon-Bearing Materials." Metals 11, no. 7 (July 19, 2021): 1137. http://dx.doi.org/10.3390/met11071137.

Full text

Abstract:

This study investigates the non-isothermal reduction of iron ore fines with two different carbon-bearing materials using the thermogravimetric technique. The iron ore fines/carbon composites were heated from room temperature up to 1100 °C with different heating rates (5, 10, 15, and 20 °C/min) under an argon atmosphere. The effect of heating rates and carbon sources on the reduction rate was intensively investigated. Reflected light and scanning electron microscopes were used to examine the morphological structure of the reduced composite. The results showed that the heating rates affected the reduction extent and the reduction rate. Under the same heating rate, the rates of reduction were relatively higher by using charcoal than coal. The reduction behavior of iron ore-coal was proceeded step wisely as follows: Fe2O3 → Fe3O4 → FeO → Fe. The reduction of iron ore/charcoal was proceeded from Fe2O3 to FeO and finally from FeO to metallic iron. The reduction kinetics was deduced by applying two different methods (model-free and model-fitting). The calculated activation energies of Fe2O3/charcoal and of Fe2O3/coal are 40.50–190.12 kJ/mol and 55.02–220.12 kJ/mol, respectively. These indicated that the reduction is controlled by gas diffusion at the initial stages and by nucleation reaction at the final stages.

APA, Harvard, Vancouver, ISO, and other styles

25

Wolfinger, Thomas, Daniel Spreitzer, and Johannes Schenk. "Using Iron Ore Ultra-Fines for Hydrogen-Based Fluidized Bed Direct Reduction—A Mathematical Evaluation." Materials 15, no. 11 (June 1, 2022): 3943. http://dx.doi.org/10.3390/ma15113943.

Full text

Abstract:

This mathematical evaluation focuses on iron ore ultra-fines for their use in a novel hydrogen-based fluidized bed direct reduction process. The benefits of such a process include reduced CO2 emissions and energy consumption per ton of product, lower operational and capital expenditure, and a higher oxide yield. Typical samples of iron ore ultra-fines, such as pellet feed, are given and classified for a fluidized bed. An operating field for a hydrogen-based fluidized bed direct reduction process using iron ore ultra-fines is shown in the fluidized state diagram following Reh’s approach and compared to other processes. The effects of the process conditions and the agglomeration phenomenon sticking were analyzed and evaluated with mathematical case studies. The agglomeration phenomenon sticking was identified as the most critical issue; thus, the dependencies of the fluid dynamics on the characteristic diameter were examined.

APA, Harvard, Vancouver, ISO, and other styles

26

Guo, Lei, Shengping Zhong, Qipeng Bao, Jintao Gao, and Zhancheng Guo. "Nucleation and Growth of Iron Whiskers during Gaseous Reduction of Hematite Iron Ore Fines." Metals 9, no. 7 (July 4, 2019): 750. http://dx.doi.org/10.3390/met9070750.

Full text

Abstract:

A high-temperature confocal scanning laser microscope and an online reduction–water quenching experiment system were used to systematically study the generation of iron whiskers during the reduction of hematite ore particles with CO/CO2 gas. The "blooming" phenomenon of the surface during the reduction of iron ore particles was found in this experiment. The orientation of the grain on the longitudinal section of an iron whisker was measured to be uniform by applying the electron back-scattered diffraction technique, which proved that the iron whiskers are most likely to exist in single crystal form. According to the in-situ online experimental video, the average diffusion flux of iron atoms when the layered iron completely covers the surface of the ore particle is about 0.0072 mol/(m2·s). While the iron atom diffusion flux at the root of the iron whisker during the pre-growth process is much larger than the flux when the layered iron is produced, which are defined to be 0.081 mol/(m2·s), 0.045 mol/(m2·s), 0.013 mol/(m2· s), and 0.0046 mol/(m2·s), respectively during the four stages of the growth of an iron whisker. The quantitative relationship between the chemical driving force and the whisker growth is established as Δ G θ + R T ln p CO 2 p CO + 2 n 0.056 r ρ E s T = 0 .

APA, Harvard, Vancouver, ISO, and other styles

27

Pramanik, Susanta, and Swapan Kumar Mitra. "Development of Hollow Iron Ore Agglomerate and its Characterization." Materials Science Forum 783-786 (May 2014): 956–60. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.956.

Full text

Abstract:

Blast Furnace remains to be one of main producers of molten iron. The secondary or alternate sources of producing molten iron have come in place and contribute around 30% of molten iron production in the world. Good iron ore reserves are fast depleting coupled with a huge amount of fines being produced during mining.

APA, Harvard, Vancouver, ISO, and other styles

28

Wan, Zi-wei, Jin-yu Huang, Guo-min Zhu, and Qi-yan Xu. "Numerical Simulation of the Operating Conditions for the Reduction of Iron Ore Powder in a Fluidized Bed Based on the CPFD Method." Processes 10, no. 9 (September 16, 2022): 1870. http://dx.doi.org/10.3390/pr10091870.

Full text

Abstract:

In this work, the computational particle fluid dynamics (CPFD) method is used to simulate the high-pressure visual fluidized bed experimental equipment independently designed and developed by the experimentation of the fluidized reduction process of iron ore powder. A numerical model for reducing iron ore fines in a three-dimensional fluidized bed is established, and the model is verified by combining numerical simulation and experimental testing. Moreover, the influences of different reducing factors on the reduction effect in the process of the fluidized reduction of iron ore fines are simulated in detail. Via the CPFD simulation of the fluidized reduction of iron ore fines, the optimal reduction pressure is found to be 0.2 MPa, and the optimal reducing gas is found to be H2. Moreover, the optimal gas velocity is 0.6 m/s, and the optimal reduction temperature is 923 K. This conclusion is consistent with the experimental measurements, so the simulation results can be used to verify the reliability of the optimal operating conditions.

APA, Harvard, Vancouver, ISO, and other styles

29

Nayak, Nirlipta P., and Bhatu K. Pal. "Separation Behaviour of Iron Ore Fines in Kelsey Centrifugal Jig." Journal of Minerals and Materials Characterization and Engineering 01, no. 03 (2013): 85–89. http://dx.doi.org/10.4236/jmmce.2013.13016.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Mahiuddin, S., I. Suryanarayan, N. N. Dutta, and P. C. Borthakur. "Adsorption studies of sodium humate on Indian iron ore fines." Colloids and Surfaces 64, no. 3-4 (July 1992): 177–84. http://dx.doi.org/10.1016/0166-6622(92)80097-l.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Kodukula, U. B., Y. R. Murthy, K. K. Rao, J. P. Barnwal, N. R. Ramakrishnan, P. Biral, P. C. Naganoor, and R. Venugopal. "Studies on water-injection cyclone for processing iron ore fines." Mining, Metallurgy & Exploration 25, no. 2 (May 2008): 79–84. http://dx.doi.org/10.1007/bf03403390.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Agrawal, Shrey, and Nikhil Dhawan. "Carbothermic Microwave Processing for the Enrichment of Iron Ore Fines." Journal of Sustainable Metallurgy 6, no. 2 (June 2020): 355–66. http://dx.doi.org/10.1007/s40831-020-00279-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Umadevi, T., K. Sridhara, Sah Rameshwar, and R. Srinidhi. "Usage of High-LOI Iron Ore Fines in Pellet Making." Transactions of the Indian Institute of Metals 72, no. 10 (June 8, 2019): 2599–611. http://dx.doi.org/10.1007/s12666-019-01729-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Luo, Siyi, Chen Ma, Lin Liu, Junzhi Wang, Zongliang Zuo, and Lan Xiang. "Direct Reduction Ironmaking by Co-Pyrolysis of Biomass Tar Model Compounds and Iron Ore Fines." Journal of Biobased Materials and Bioenergy 14, no. 4 (August 1, 2020): 506–10. http://dx.doi.org/10.1166/jbmb.2020.1986.

Full text

Abstract:

The low carbon metallurgy technology based on the high-value utilization of biomass is considered as the key development orientation of green ironmaking. In this paper, a pyrolysis coupling technology of biomass tar and iron ore powder is proposed for the reduction of iron ore. Tar is degraded efficiently due to the synergy effects respectively through oxidation of iron oxides and the catalytic action of reduced iron, and simultaneously the reduction of iron oxide to metallic iron. Representative tar components including vanillin, naphthalene, and catechol were selected as tar model compounds. The various reaction conditions on the reduction degree of iron ores was investigated, which include the type of tar component, the pyrolysis temperature, and the ratio of reactants. According to the results, the optimal relationship between tar degradation and reduction of iron ore was identified. It can be found that under the catalytic effects of iron ore fines, the degradation efficiency of the three model compounds followed the following order: naphthalene > vanillin > catechol. Naphthalene owned the better reduction ability. The highest reduction degree of the product reached to 78.5% at 800 °C for 30 min.

APA, Harvard, Vancouver, ISO, and other styles

35

Pal, J., S. Ghoari, A. Ammasi, S. K. Hota, V. M. Koranne, and T. Venugopalan. "Improving reducibility of iron ore pellets by optimization of physical parameters." Journal of Mining and Metallurgy, Section B: Metallurgy 53, no. 1 (2017): 37–46. http://dx.doi.org/10.2298/jmmb151206014p.

Full text

Abstract:

Reducibility of iron bearing material is an important property which represents its suitability of reduction in iron making furnaces. It has direct influence on improving productivity and lowering energy consumption in iron making process. The reducibility of iron ore pellets of a specific chemistry can be improved by the optimization of physical parameters such as induration temperature, improving size distribution of fines, improving apparent porosity etc. In this study, the reference pellet is prepared in a typical plant condition and the properties of the reference pellet are considered as base value to improve reducibility index (RI) maintaining other properties at the acceptable limit without altering pellet chemistry. Optimization of induration temperature at the 1250-1275?C shows around 74 % RI, which is 5 points more than the base value of 69.5 %. Furthermore, on optimizing additives size, such as limestone fines and anthracite coal fines at -350 mesh and induration temperature of 1250-1275?C, RI is improved to 77 %, i.e., 8 points improvement is achieved with respect to the base value.

APA, Harvard, Vancouver, ISO, and other styles

36

Huang, X. B., X. X.W., J. J. Song, C. G. Bai, R. D. Zhang, and M. J. Zhou. "Contact angle of water on iron ore fines: Measurement and analysis." Journal of Mining and Metallurgy, Section B: Metallurgy 51, no. 1 (2015): 33–40. http://dx.doi.org/10.2298/jmmb140903010h.

Full text

Abstract:

The relative contact angle (?RCA) for seven iron ore fines was measured by using Washburn Osmotic Pressure method under laboratory conditions. By choosing cyclohexane as the reference that can perfectly wet iron ore particles, the relative contact angles were measured and varied from 57? to 73?. With the volume % of goethite (?G) as the variable, a new model for relative contact angle was developed. The expected relative contact angle for pure goethite is about 56?, while that for goethite free samples is about 77?. Physical properties, such as surface morphology (SMI) and pore volume (Vpore) can influence the relative contact angle. The ?G can be expressed as a function of SMI and VPore. Thus, we inferred that the relative contact angle is a function of ?G for the iron ores used. The measured relative contact angles were found to be in good agreement (Radj 2 >0.97) with the calculated ones based on the research from Iveson, et al. (2004). Comparing with the model developed by Iveson et al.(2004), the new model for contact angle proposed in this paper is similar, but more detailed with two meaningful physical parameters. The modification of physicochemical properties on iron ores would be another topic in the further study on granulation.

APA, Harvard, Vancouver, ISO, and other styles

37

Dey, Shobhana, Manoj Kumar Mohanta, Manik Chand Goswami, and Santosh Pani. "Recovery of Iron Values from Waste Manganiferous Iron Ore Fines for Pellet Making." Journal of Minerals and Materials Characterization and Engineering 02, no. 05 (2014): 513–21. http://dx.doi.org/10.4236/jmmce.2014.25052.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Wan, Junying, Tiejun Chen, Xianlin Zhou, Jiawen Liu, Benjing Shi, Zhaocai Wang, and Lanlan Li. "Investigations into NOx Formation Characteristics during Pulverized Coal Combustion Catalyzed by Iron Ore in the Sintering Process." Metals 12, no. 7 (July 15, 2022): 1206. http://dx.doi.org/10.3390/met12071206.

Full text

Abstract:

Sintering accounts for about 50% of the total NOx emissions of the iron and steel industry. NOx emissions from the sintering process can be simulated using the emissions from coke combustion. However, the generation and emission law for NOx burning in the sintering process of pulverized coal is still not clear. The formation characteristics of NOx during coal combustion catalyzed by iron ore fines and several iron-containing pure minerals were studied in this paper. The results showed that iron ore fines can improve the NOx emission rate and increase the total NOx emissions during coal combustion. The type and composition of the iron ore fines have an important impact on the generation and emission of NOx in the process of coal combustion. The peak concentration and emissions of NOx in coal combustion flue gas with limonite, hematite or specularite added increased significantly. The peak value for the NOx concentration in the coal combustion flue gas with magnetite or siderite added increased, but the emissions decreased. Therefore, the generation of NOx in the sintering process can to a certain extent be controlled by adjusting the type of iron-containing raw materials and the distribution of the iron-containing raw materials and coal.

APA, Harvard, Vancouver, ISO, and other styles

39

Ariyama, Tatsuro, Shinichi Isozaki, Shinji Matsubara, Hitoshi Kawata, Kunihiro Kondo, and Isao Kobayashi. "Reduction Behavior of Iron Ore Fines and Circulation Characteristics of Fines is Prereduction Fluidized Bed." ISIJ International 33, no. 12 (1993): 1211–19. http://dx.doi.org/10.2355/isijinternational.33.1211.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Prasad, Rakesh, Shatrughan Soren, L. A. Kumaraswamidhas, Chandan Pandey, and S. K. Pan. "Experimental Investigation of Different Fineness and Firing Temperatures on Pellets Properties of Different Iron Ore fines from Indian Mines." Materials 15, no. 12 (June 14, 2022): 4220. http://dx.doi.org/10.3390/ma15124220.

Full text

Abstract:

In India, during mining and ore processing, ore fine generation is a common phenomenon, in which more than 60% of process ore becomes discarded material. To explore the alternative of high-grade ores, mutual replacement with the utility of dump ore fines is the best way. With this perspective, Kiruburu iron ore mine (Iron Ore No.1) and Meghataburu iron ore mine (Iron Ore No.2) dumped fines were chosen for a Blaine no. investigation, in the connection of firing temperatures, to get optimum desirable physical properties, Cold Compression Strength (C.C.S.),and Apparent Porosity (A.P.), with physico-chemical properties, Reducibility Degradation Index (R.D.I.), and Reducibility Index (R.I.). To characterize pellet properties with input variables, a microstructure phase study has been conducted using a scanning electron microscope (S.E.M.), energy dispersive spectroscopy (EDS), and X-ray diffraction analysis (XRD). The Iron Ore No.1 and 2 fine pellets survey showed good, desirable properties, at the Blaine no., of 1678 cm2/g and 2311 cm2/g (corresponding to 200 mesh size), and the best results are attained at a firing temperature of 1300 °C. Thermal kinetic analysis of the heating of pellets has been done to knowthe activation energy of different ore characteristics. The results showed that Iron Ore No.2 pellets have high activation energy.

APA, Harvard, Vancouver, ISO, and other styles

41

Park, Junwoo, Eunju Kim, In-kook Suh, and Joonho Lee. "A Short Review of the Effect of Iron Ore Selection on Mineral Phases of Iron Ore Sinter." Minerals 12, no. 1 (December 25, 2021): 35. http://dx.doi.org/10.3390/min12010035.

Full text

Abstract:

The sintering process is a thermal agglomeration process, and it is accompanied by chemical reactions. In this process, a mixture of iron ore fines, flux, and coal particles is heated to about 1300 °C–1480 °C in a sinter bed. The strength and reducibility properties of iron ore sinter are obtained by liquid phase sintering. The silico-ferrite of calcium and aluminum (SFCA) is the main bonding phase found in modern iron ore sinters. Since the physicochemical and crystallographic properties of the SFCA are affected by the chemical composition and mineral phases of iron ores, a crystallographic understanding of iron ores and sintered ore is important to enhance the quality of iron ore sinter. Scrap and by-products from steel mills are expected to be used in the iron ore sintering process as recyclable resources, and in such a case, the crystallographic properties of iron ore sinter will be affected using these materials. The objective of this paper is to present a short review on research related to mineral phases and structural properties of iron ore and sintered ore.

APA, Harvard, Vancouver, ISO, and other styles

42

Pal, Jagannath, Satadal Ghorai, and T. Venugopalan. "Effect of high Blaine iron ore fines in hematite ore pelletization for blast furnace." Mineral Processing and Extractive Metallurgy 129, no. 3-4 (August 12, 2018): 299–307. http://dx.doi.org/10.1080/25726641.2018.1505208.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Li, Heping, Shengli Wu, Zhibin Hong, Weili Zhang, Heng Zhou, and Mingyin Kou. "The Mechanism of the Effect of Al2O3 Content on the Liquid Phase Fluidity of Iron Ore Fines." Processes 7, no. 12 (December 6, 2019): 931. http://dx.doi.org/10.3390/pr7120931.

Full text

Abstract:

The sintering process is significantly important for the ironmaking in China because of the large amount of sinter consumed. Al2O3 is an important element determining the quality and quantity of sinter. However, different conclusions have been made regarding the effects of Al2O3 on the amount and fluidity of the liquid phase formed in the sinter phase. Therefore, it is necessary to examine the effects of Al2O3 content on the amount and fluidity of the liquid phase. The present work investigated the effects of different Al2O3 contents of iron ore fines on the liquid phase formation, mineral composition, and consolidation strength. The results showed that a small amount of Al2O3 increased the amount of calcium ferrite, making the liquid phase formation easier. As the Al2O3 content in iron ore fines increased, the liquidity index decreased continuously, while the fluidity and the consolidation strength of the sintered body were directly related to the content squared. The quality of the sinter is optimal when the Al2O3 content of the iron ore fines is about 2 wt % (the SiO2 content is 4 wt %).

APA, Harvard, Vancouver, ISO, and other styles

44

Carmignano, Ottavio Raul Domenico Riberti, and Cornélio de Freitas Carvalho. "Comparison between bentonite and serpentinite in the production process of iron ore pellets." Rem: Revista Escola de Minas 67, no. 1 (March 2014): 47–53. http://dx.doi.org/10.1590/s0370-44672014000100007.

Full text

Abstract:

Pelletizing iron ore fines is an agglomeration process that through a thermal treatment converts the ultra-fines fraction thereof into small balls ranging in size from 8mm (0.31 in.) to 18mm (0.71 in.), with adequate characteristics for feeding steel reduction works. The binder more used to make pellets is bentonite, which is an item of significant cost in the process. The present paper aims at evaluating the use of serpentinite instead of bentonite. The results obtained show that the full substitution of bentonite for serpentinite is unfeasible. However a potential does exist for using serpentinite and bentonite together in the iron ore palletizing process in the proportion of 1:1.

APA, Harvard, Vancouver, ISO, and other styles

45

Raghukumar, C., Sunil Kumar Tripathy, and S. Mohanan. "Beneficiation of Indian High Alumina Iron Ore Fines – a Case Study." International Journal of Mining Engineering and Mineral Processing 1, no. 2 (August 31, 2012): 94–100. http://dx.doi.org/10.5923/j.mining.20120102.11.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Xu, J. Q., R. P. Zou, and A. B. Yu. "Quantification of the mechanisms governing the packing of iron ore fines." Powder Technology 169, no. 2 (October 2006): 99–107. http://dx.doi.org/10.1016/j.powtec.2006.08.004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Patra, A. S., D. Makhija, A. K. Mukherjee, R. Tiwari, C. R. Sahoo, and B. D. Mohanty. "Improved dewatering of iron ore fines by the use of surfactants." Powder Technology 287 (January 2016): 43–50. http://dx.doi.org/10.1016/j.powtec.2015.09.030.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Kapur, P. C., Pawan Kapur, and D. W. Fuerstenau. "An auto-layering model for the granulation of iron ore fines." International Journal of Mineral Processing 39, no. 3-4 (October 1993): 239–50. http://dx.doi.org/10.1016/0301-7516(93)90018-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Li, Xiaohang, and Jianwei Zhang. "Experimental Study on the Liquefaction Mechanism of Iron Ore Fines Cargoes." IOP Conference Series: Earth and Environmental Science 513 (July 8, 2020): 012065. http://dx.doi.org/10.1088/1755-1315/513/1/012065.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Kumasaka, A., K. Kondo, N. Sakamoto, O. Komatsu, H. Noda, and M. Shimiz. "Granulation characteristics of iron ore fines for hybrid pelletized sinter process." Revue de Métallurgie 89, no. 3 (March 1992): 225–32. http://dx.doi.org/10.1051/metal/199289030225.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Iron ore fines'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles