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Dissertations / Theses on the topic 'Smelting reduction'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Pichestapong, Pipat. "Non-coke smelting reduction of iron ores : process modelling /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/10560.

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2

Mitchell, Andrew R. "The reduction of tin concentrate by solid carbon." Thesis, Open University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278401.

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3

Parra, Figueroa Roberto. "Étude expérimentale de la fusion réductrice du Cu2O dans le système Cu2O-FeOx-SiO2." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0118.

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La fusion reductrice de cu#2o contenu dans un laitier cu#2o-feo#x-sio#2 est a la base d'un nouveau procede non polluant pour la production du cuivre a partir de minerais a forte teneur en as et s. La physico-chimie de la reaction est analogue a celle des nouveaux procedes de reduction directe des minerais de fer qui servent de reference a la presente etude. Une premiere partie fait le point sur la thermodynamique du systeme cu#2o-cuo-feo-fe#2o#3-sio#2. Des essais montrent qu'une reduction de cu#2o par feo est possible avec production de cuivre metal et des ferrites de cuivre. Le reste est cons

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4

Yu-Ching, Shih, and 石玉清. "Axisymmetric Thermal Stress Analysis of Smelting Reduction Vessel." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/95219670031380817051.

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碩士<br>國立臺灣大學<br>應用力學研究所<br>88<br>The Objective of this thesis is to create a 2D axisymmetry Finite Element Method (FEM) model based on FEM software ABAQUS to simulate the steady state and transient heat transfer problem and thermal stress problem of Experimental Smelting Reduction Vessel (ESRV). With that, we discuss the temperature distribution and stress distribution of the lining of ESRV which is operated under 1750℃.

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5

Jao, Pang-Yian, and 饒邦彥. "Parametric Study on the Post Combustion in a Smelting Reduction Furnace." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/06170067185726111819.

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碩士<br>國立成功大學<br>航空太空工程學系<br>89<br>The objectives of this smelting reduction furnace study are to understand the heat transfer, fluid mechanics and combustion process inside a smelting reduction furnace, to develop the parametric control for the combustion optimization and to minimum energy consumption for the smelting reduction. A cold flow analysis with k-e turbulence model was used to investigate the velocity and pressure profiles inside the testing furnace, which provide the initial information for the combustion analysis. Coal combustion with the finite rate/eddy-brea

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6

Chen, XiangQuan, and 陳相銓. "Recycling Metals from Stainless Steel Dust with Electric Smelting Reduction Furnace." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/zra55q.

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碩士<br>國立中央大學<br>環境工程研究所在職專班<br>106<br>With the advancement of technology, more stringent regulation in environmental protection and the trend of implementing circular economy policies, how to recycle valuable metals from fly ash has become a big challenge. The aim of this study is to evaluate the effectiveness of electric smelting reduction furnace (ESRF) to recover valuable metals from the fly ash collected from stainless steel industry. Analysis of the compositions of stainless steel fly ash indicates that four elements including iron, chromium, nickel, and zinc, are of the most recovery val

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7

Hsu, Te-Hsun, and 徐德弦. "Recovering Cr and Ni from EAF Dust by Electric Smelting Reduction Furnace." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/nvhh6z.

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碩士<br>國立中央大學<br>環境工程研究所<br>103<br>The yield of EAF dust collected is around 180k to 220k tons annually in Taiwan, including 60k tons of stainless steel dusts. However, relevant research shows that the amounts of Pb, Cd, and Cr(VI) leached form the EAF dust have exceeded the limits. Taiwan EPA has characterized EAF dust as hazardous industrial waste. If the waste is not treated properly, it will bring harms to the environment, biological system, and human beings. To avoid those harms, the EAF dusts should be properly recycled and treated to reduce the adverse impact. At present, the EAF dust re

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8

Su, Chau-Jeng, and 蘇朝正. "Physical Simulation of Bottom Blowing Stirring inside Smelting Reduction Vessel by Water Modeling." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/97449745232137483531.

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博士<br>義守大學<br>材料科學與工程學系博士班<br>98<br>In order to increase the productivity, the gas bottom blowing technique has been applied to mix molten iron/slag inside the ironmaking smelter. The main function of the technique is to increase the interface area between slag and iron, then to enhance the rate of the smelting reduction. Dimensional analysis technique was used to intensify the similarity between the water model and the experimental smelting reduction vessel. Then, the water model experiments were conducted to investigate both the mixing time of the molten iron phase and the erosion of the bot

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9

Huang, Yu-Chun, and 黃昱淳. "Effect of Operating Conditions on Refractory Erosion of Smelting Reduction Furnace by Water Modeling." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/48375558284542765229.

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碩士<br>義守大學<br>材料科學與工程學系<br>88<br>This research was performed under different operating conditions with the water mold of smelt reduction vessel provided by China Steel Corporation to find out the best stirring effect of bottom blowing gas injection. In the meanwhile, the boric acid (H3BO3) disks were also chosen to simulate the erosion of refractory under different operating conditions. During the experiments of assessment of stirring effect under gas injection in the smelt reduction water mold, we fixed the focusing point of tuyere at the center of bath surface and arranged tuyere

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10

吳鉉忠. "The Application of Two Phase Flow Simulation Technology in an Iron Smelting Reduction Furnace." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/06525841541652447702.

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11

chao, hsin-lung, and 趙信隆. "steady state thermal stress analysis of three dimention smelting reduction vessel finite element model." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/50798383072284516228.

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碩士<br>國立臺灣大學<br>應用力學研究所<br>88<br>Iron ore smelting reduction is one of new iron smelting processes. Because it emissions fewer pollution products, such as CO2, NOX, and SOX, etc. Besides it needs lower cost in raw material and economize the use of energy. The advantage of this process is that the constituents of carbon will all be transfer to carbon dioxide. The utility rate of coal can reach 100% in the theory. So all the advanced country of iron and steel industry are actively participate in exploiting the whole new iron smelting process. In order to adapt to the different region that bear t

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12

Sekhukhune, Lehlogonolo Mokgadi. "Acidified ferric chloride leaching behaviour of a complex Ni – Cu matte at atmospheric pressure." Thesis, 2013. http://hdl.handle.net/10210/8303.

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13

Guan-JhouChen and 陳冠州. "Study on Nickel Enrichment in Nickel Pig Iron during Reduction and Smelting of Limonite Laterite." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/b6qsc3.

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博士<br>國立成功大學<br>材料科學及工程學系<br>104<br>This research is divided into three parts, which include in calcination process, calcining temperatures and high temperature melting for limonite laterite. First, compared with reduced uncalcined laterite, when calcined limonite pellets were reduced at 1100oC for 30 min and carbon-oxygen ratio=1, the Nickel grade increased from 4.7% to 11.4% and the recovery of Nickel decreased from 84.5% to 57.1%. Second, 400oC-calcined limonite ore possesses a higher specific surface area of 48.84m2/g, and an average pore size of 29.68 Å, which provide better activity for

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14

Liu, Jin. "Study of the kinetics of carbon reduction of matte/oxysulfide/slag in nickel/copper flash smelting." 2004. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=94754&T=F.

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15

Wu, Shiu-Chia, and 吳秀佳. "Flow Simulation in the Liquid Bath of a Iron Smelting Reduction and Its Water Model Experiments." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/11419529040302629609.

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碩士<br>國立成功大學<br>材料科學(工程)學系<br>86<br>In this thesis study, a mathematical model has been developed tosimulate the flow phenomena for gas stirring in the iron bath of the smelter for direct iron ore smelting reduction process. A corresponding water model has also been constructed to observe the flow pattern in the liquid bath system. The flow phenomena of concerns includes flow pattern and mixing time at various rate of gas injection for liquids of different viscosity. To assure the accuracy

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16

Tzuwei, Huang, and 黃子瑋. "Effect of Operation Conditions on Fluid Flow and Mass Transfer in Smelting Reduction Furnace by Water Modeling." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/93170564329787919769.

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碩士<br>義守大學<br>材料科學與工程學系<br>88<br>This study was performed with the water mold to physically simulate the mass transfer effect between iron and slag in DIOS process. The operating conditions include bottom blowing gas flow rate (240 NL/min ~ 600 NL/min), tuyere size (7.5mm ~ 15.0mm), the simulators of iron and slag bath height (460/100 mm ~ 500/60mm), and tuyere number (3, 4, and 5 tuyeres) to find out the mass transfer effect between iron and slag under different operating conditions in the smelt reduction vessel . During the experiments of assignment of stirring effect under gas in

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17

Huang, Chien-Chia, and 黃建家. "Fluid Flow and Thermal Similarity Study for the Formation of Solid Mushroom in Iron Ore Smelting Reduction Process." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/31396164958833699299.

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碩士<br>國立成功大學<br>材料科學及工程學系碩博士班<br>92<br>This research is divided into two parts mainly; one part of this research discusses the heat conducting effect of the mushroom-shaped solid near the bottom-blown tuyere for conditions of smelting reduction iron-making proccess, and derives the dimensionless groups and heat conduction dimensionless equation by considering the physical parameters of formation of mushroom-shaped solid. At the same time, this research uses the numerical simulation to simulate the shape of mushroon-shaped solid, and compares with water model experimental results. Another part

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18

Tsai, Ying ling, and 蔡映麟. "Mathematical Modeling of the Fluid Flow Phenomena Induced by Bottom Gas Injection in an Iron Smelting Reduction Furnace." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/11629686277234486528.

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碩士<br>國立成功大學<br>材料科學及工程學系<br>87<br>A mathematical model has been developed to simulate the fluid flow phenomena induced by bottom gas injection in the smelter for direct iron ore smelting reduction process. The concerned fluid flow phenomena include how molten iron is induced to flow by the flotation of gas bubbles and how the motions of gas bubbles are affected by the liquid flow. The effects of design and operating conditions such as gas flow rate, liquid surface height, and inclined injection from off-center tuyeres on the fluid flow phenomena are also investigated in this research.

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19

Hwang, Y. P., and 黃昱斌. "Study of the Formation of Solid Mushroom in the Direct Iron Ore Smelting Reduction Process by a Low Temperature Water Model." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/51808795986660972356.

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碩士<br>國立成功大學<br>材料科學及工程學系<br>89<br>In direct iron smelting reduction (Iron making furnace) process, molten iron near the bottom-blown gas tuyere is cooled by the low temperature/endothermic gas and form a mushroom-shaped solid on top of the tuyere. The formation of an appropriate solid mushroom, which covers the tuyere, can protect the tuyere and the surrounding refractory. In this study, a water model with low temperature gas system is established to investigate the formation of the solid mushroom and the effects of operating conditions on the shape and dimension of the solid mushroom.

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20

Tseng, Wen-Hung, and 曾文宏. "Study of the Accretion Formation in the Iron Smelting Reduction Furnace by Using Low-temperature Water Simulation Model with Single Pipe Tuyere." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/19858738517287852333.

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碩士<br>國立成功大學<br>材料科學及工程學系<br>87<br>A water tank equipped with a submerged low-temperature air blowing system was built to simulate the formation of accretion on the bottom of the smelting reduction furnace. The mechanism of the ice accretion formation was studied in detail. A systematic study on the shape and size of the ice accretion formed on the bottom of water tank as a function of the processing parameters, which include the diameters of single-pipe tuyere, water temperatures, and time, were conducted. It is observed that the temperature of wa

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21

蔣承學. "The Study of the Effect of Bottom Blowing Conditions on Mixing of Molten Iron and Refractory Erosion in the Smelting Reduction Vessel by Water Modeling." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/61417048340304732307.

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碩士<br>義守大學<br>材料科學與工程學系<br>92<br>In order to provide for bottom-blowing gas to obtain the most effectively using of ESRV, the experiment get up influence of iron phase mixing time by stirring gas bottom-blowing . This research is composed of two major sections. The first section is experiments concerning analysis of mixed irons. The second section is experiments concerning analysis of refractory erosion. Mixing time simulation work is carried out utilizing an acrylic water model sized 60% of a typical ESRV. Media used to simulate liquid iron this model is water, and compressed air f

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22

Liao, Chih-Chiang, and 廖志強. "Study of the Formation of Solid Mushroom in the Direct Iron Ore Smelting Reduction Process With Double-Bore Bottom Blowing Tuyere by a Low Temperature Water Model." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/50426009460771394830.

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碩士<br>國立成功大學<br>材料科學及工程學系<br>87<br>In this research a low temperature water model has been established to study the formation of solid mushroom in the direct iron ore smelting reduction (DIOS) process. In DIOS process, double pore tuyeres are used to inject gases into the liquid bath. Argon gas is injected through inner pore for the stirring of molten iron and slag. Hydro- carbon gases are injected through the outer pore to react with molten iron. The reaction is endothermic and thus form a solid mushroom. The formation of the solid mushroom can cover the bottom tuyere and protect the refract

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23

Καραμούτσος, Σπυρίδων-Διονύσιος. "Ανάπτυξη μεθόδου εξουδετέρωσης επικίνδυνων στερεών κατάλοιπων πετρελαϊκών μονάδων ηλεκτροπαραγωγής με ανάκτηση πολύτιμων κραματικών μετάλλων". 2004. http://nemertes.lis.upatras.gr/jspui/handle/10889/243.

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Το ηλεκτροπαραγωγικό δυναμικό της ΔΕΗ περιλαμβάνει άνω των 40 πετρελαϊκών σταθμών συνολικής ισχύος 2100MW και οι μεγαλύτεροι είναι του διασυνδεδεμένου συστήματος και λειτουργούν στο Λαύριο και το Αλιβέρι. Οι υπόλοιποι λειτουργούν στο αυτόνομο σύστημα των νησιών του Αιγαίου και Κρήτης. Κατά τους καθαρισμούς των προθερμαντών αέρος και των δεξαμενών μαζούτ των μονάδων αυτών παράγονται σήμερα άνω των 500t στερεών καταλοίπων ετησίως με αυξητική τάση. Τα κατάλοιπα αυτά χαρακτηρίζονται σύμφωνα με την Ευρωπαϊκή οδηγία ως επικίνδυνα. Σύμφωνα με τους κανονισμούς της Ε.Ε. είναι υποχρεωτική η αδρανοποίησή

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24

Τζεβελέκος, Θεοφανής. "Ανάπτυξη μεθόδου ανακύκλωσης και παραγωγής νέων υλικών με αναγωγική τήξη κόνεων συστημάτων αντιρρύπανσης βιομηχανίας παραγωγής σιδηρονικελίου". 2004. http://nemertes.lis.upatras.gr/jspui/handle/10889/253.

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Η επεξεργασία των νικελιούχων λατεριτικών μεταλλευμάτων της χώρας μας για την παραγωγή σιδηρονικέλιου στη Λάρυμνα συνοδεύεται με την εκπομπή 200000t/y λεπτομερούς σκόνης που συλλέγεται στα συστήματα αντιρρύπανσης των περιστροφικών κάμινων (Π/Κ), μέσης περιεκτικότητας 1.2-1.5% σε Ni και 4-5% σε C. Η διατριβή αυτή συνέβαλε στην ανάπτυξη μεθόδου ανακύκλωσης της σκόνης αυτής με απευθείας αναγωγική της τήξη σε ηλεκτρική κάμινο συννεχούς ρεύματος (DC-HEP) με εμφυσησή της μέσω του κεντρικού διάτρητου γραφιτικού ηλκετρόδιου. Την προκαταρκτική θεωρητική διερεύνηση και τις εργαστηριακές προδοκιμές ακολο

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