Experiment Study on the High-Phosphorus Hematite Carbothermal Reduction in Microwave Field

2011 ◽  
Vol 291-294 ◽  
pp. 1317-1320
Author(s):  
Zhi Jun He ◽  
Yong Long Jin ◽  
Hui Zhang
Keyword(s):  
Experimental Research ◽  
Iron Content ◽  
Carbothermal Reduction ◽  
Iron Ore ◽  
Microwave Field ◽  
Experiment Study ◽  
High Phosphorus ◽  
Reduction Of Iron ◽  
Speed Up ◽  
Dephosphorization Rate

In the paper, the experimental research on dephosphorization and iron yield for high-phosphorus oolitic hematite by coal-based carbothermal reduction was carried out. It indicated that microwave can speed up the rate of carbothermal reduction of iron ore and strengthen the effects of dephosphorization and increasing iron content. The dephosphorization rate and iron yield of high-phosphorus oolitic hematite exceeding 87.8% and 91.8% by the way of carbothermal reduction in the microwave field and a further fine-grinding and magnetic separation.

Mechanism Study on the High-Phosphorus Hematite Carbothermal Reduction in Microwave Field

2011 ◽  
Vol 291-294 ◽  
pp. 1358-1361 ◽  
Author(s):  
Zhi Jun He ◽  
Hui Zhang ◽  
Yong Long Jin
Keyword(s):  
Carbothermal Reduction ◽  
Iron Ore ◽  
Microwave Field ◽  
Reduction Rate ◽  
Lattice Energy ◽  
Reduction Reaction ◽  
Mechanism Study ◽  
High Phosphorus ◽  
Thermodynamics And Dynamics ◽  
Reaction Activation Energy

In the paper, the research on raising the grade of iron ore and dephosphorization for high-phosphorus oolitic hematite by coal-based carbothermal reduction in microwave field was carried out. The microwave action mechanism was analyzed by the aspects of ionic crystal lattice energy and thermodynamics and dynamics[1]. The possibility of the application of microwave in raising the grade of iron ore and dephosphorization for high-phosphorus hematite was discussed. The research indicated that the primary structure of the high-phosphorus hematite was changed by the high-phosphorus hematite carbothermal reduction in microwave field, meantime the carbothermal reduction reaction activation energy was decreased and the reduction rate was speeded up[2-4].

scholarly journals Carbothermal Reduction of Iron Ore in Its Concentrate-Agricultural Waste Pellets

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Zhulin Liu ◽  
Xuegong Bi ◽  
Zeping Gao ◽  
Wei Liu
Keyword(s):  
Carbothermal Reduction ◽  
Iron Ore ◽  
Loss Rate ◽  
Direct Reduction ◽  
Agricultural Waste ◽  
Weight Loss Rate ◽  
Iron Concentrate ◽  
High Speeds ◽  
Reduction Of Iron ◽  
Biomass Char

Carbon-containing pellets were prepared with the carbonized product of agricultural wastes and iron concentrate, and an experimental study on the direct reduction was carried out. The experimental results demonstrated that carbon-containing pellets could be rapidly reduced at 1200 to 1300°C in 15 minutes, and the proper holding time at high temperature was 15 to 20 min. The degree of reduction gradually increased with temperature rising, and the appropriate temperature of reducing pellets was 1200°C. The weight loss rate and reduction degree of pellets increased with the rise of carbon proportion, and the relatively reasonable mole ratio of carbon to oxygen was 0.9. A higher content of carbon and an appropriate content of volatile matters in biomass char were beneficial to the reduction of pellets. The carbon-containing pellets could be reduced at high speeds in the air, but there was some reoxidization phenomenon.

An Assessment of the Carbothermal Reduction of Malaysian Ilmenite by Statistical Design

2013 ◽  
Vol 858 ◽  
pp. 221-227 ◽  
Author(s):  
Hanizam Shah Saidin ◽  
S. Aishah Syed Salim ◽  
Norlia Baharun ◽  
S.A. Rezan ◽  
Hussin Hashim
Keyword(s):  
Experimental Design ◽  
Factorial Design ◽  
Strong Interaction ◽  
Carbothermal Reduction ◽  
Iron Ore ◽  
Statistical Design ◽  
Operating Parameters ◽  
Catalyst Amount ◽  
Reduction Time ◽  
Reduction Of Iron

Statistical design analysis (factorial design) was utilized to verify the significance and the interaction between the studied factors include temperature, reduction time and catalyst amount. Carbothermal reduction of iron ore sample was carried out at temperature between 1000°C to 1200°C. The effects of operating parameters studied were extent of reduction (X), carbon consumed (Cconsumed ) and nitridation (XN). Temperature was the most influential parameter that showed strong interaction with the operating parameters, meanwhile, reduction time and catalyst have showed the contrary results and had a very low percentage of contribution. The results of the experimental design showed that the extent of reduction reached up to 93% at 1200°C using 10 wt. % catalysts after 180 minutes reduction. The use of 0-10 wt % catalyst at 1200°C for 180 min reduction significantly affect the X but did not for Cconsumed and XN.Keywords: Carbothermal Reduction, Factorial Design, Malaysian Ilmenite, Nitridation.

Experimental Research on Influencing Factors of Melting Reduction for High-Phosphorus Titanomagnetite Pellets

2014 ◽  
Vol 962-965 ◽  
pp. 775-779
Author(s):  
Lin Li ◽  
Jun Yu Mu ◽  
Xiang Long Meng ◽  
Yong Qi Li ◽  
Jie Peng
Keyword(s):  
High Temperature ◽  
Influencing Factors ◽  
Experimental Research ◽  
Great Influence ◽  
Experimental Temperature ◽  
Hot Metal ◽  
Comprehensive Utilization ◽  
High Phosphorus ◽  
Oxygen Ratio ◽  
Dephosphorization Rate

Reduction of high-phosphorus titanomagnetite was studied for future comprehensive utilization of resource. Experimental temperature (T), burden alkalinity (CaO/SiO2) and carbon-oxygen ratio (C/O) had an influence on the content of [P] and [S] in hot metal. Highest dephosphorization rate in hot metal appeared at C/O=1, high temperature was beneficial to desulphurization, but not for dephosphorization. High CaO/SiO2may decrease the content of [P] and [S]. C/O and CaO/SiO2had great influence on the content of [P] and [S] in hot metal.

Carbothermal Reduction of Iron Ore Applying Microwave Energy

2012 ◽  
Vol 83 (2) ◽  
pp. 131-138 ◽  
Author(s):  
Edmilson Renato de Castro ◽  
Marcelo Breda Mourão ◽  
Luiz Alberto Jermolovicius ◽  
Cyro Takano ◽  
José Thomaz Senise
Keyword(s):  
Carbothermal Reduction ◽  
Iron Ore ◽  
Microwave Energy ◽  
Reduction Of Iron

Effects of reductant type on coal-based direct reduction of iron ore tailings

2018 ◽  
Vol 42 (3) ◽  
pp. 453-466
Author(s):  
Wei WANG ◽  
Pengfei YE ◽  
Xiaoli ZHOU ◽  
C WANG ◽  
Zekun HUO ◽  
...  
Keyword(s):  
Iron Ore ◽  
Direct Reduction ◽  
Iron Ore Tailings ◽  
Reduction Of Iron ◽  
Direct Reduction Of Iron

scholarly journals Conceptual basis of mining intensification by the geomechanical factor

2019 ◽  
Vol 109 ◽  
pp. 00089
Author(s):  
Serhii Skipochka
Keyword(s):  
Experimental Research ◽  
Iron Ore ◽  
Mineral Resources ◽  
Fixed Costs ◽  
Conceptual Basis ◽  
Mining Operations ◽  
Materials Analysis ◽  
Analysis And Synthesis ◽  
Protective Structures ◽  
Negative Phenomena

The goal of the work was to develop a concept of intensification of mining operations, taking into account geomechanical processes occurring in the “rock massif – mining workings – support and protective structures” system. The article is the result of theoretical and experimental research materials analysis and synthesis, carried out for the conditions of coal, non-metallic and iron-ore mines. Positive and negative geomechanical processes and phenomena, occurring during intensification of mining operations, have been substantiated. A set of technical and technological solutions to eliminate the negative phenomena associated with high mining rates development of mineral resources has been proposed. Recommendations, presented in this article, will significantly reduce the conditionally fixed costs of mining production and improve miner’s safety.

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