Carbothermal reduction process of the Fe-Cr-O system

Yan-ling Zhang, Yang Liu, Wen-jie Wei

分享

计量
  • 文章访问数:  300
  • HTML全文浏览量:  72
  • PDF下载量:  11
  • 被引次数: 0

目录

    Cite this article as:

    Yan-ling Zhang, Yang Liu, and Wen-jie Wei, Carbothermal reduction process of the Fe-Cr-O system, Int. J. Miner. Metall. Mater., 20(2013), No. 10, pp.931-940. https://dx.doi.org/10.1007/s12613-013-0817-1
    Yan-ling Zhang, Yang Liu, and Wen-jie Wei, Carbothermal reduction process of the Fe-Cr-O system, Int. J. Miner. Metall. Mater., 20(2013), No. 10, pp.931-940. https://dx.doi.org/10.1007/s12613-013-0817-1
    引用本文 PDF XML SpringerLink

    Carbothermal reduction process of the Fe-Cr-O system

    基金项目: 

    the Fundamental Research Funds for the Central Universities of China (No.FRF-SD-12-009A)

    supported by the National Natural Science Foundation of China (No.51074025)

    Understanding the reduction behaviors and characteristics of the end products of Fe-Cr-O systems is very important not only for maximizing the recovery of metals from stainless steel dust but also for the subsequent reuse in metallurgical process. The present work first predicted the possible products thermodynamically when FeCr2O4 was reduced by C. The reduction behaviors by graphite of three kinds of Fe-Cr-O systems, i.e., FeCr2O4, Fe2O3+Cr2O3, and Fe+Cr2O3, were then investigated in 1350–1550℃. Further, the microstructures of final products and element distribution conditions were examined. The results suggest that, thermodynamically, the mass of products for the carbothermal reduction of FeCr2O4 is a strong function of temperature, and the initial carbon content is used. More Fe-Cr-C solution and less residual carbon content are obtained at higher temperatures and lower nC:nO ratios (the initial molar ratio of C to O in the sample). Experimental data show that the sample amount tends to affect the reduction rate, and the residual carbon content strongly depends on nC:nO. With regard to the phases present in products during the reaction process, metal carbides tend to form in the initial stage, whereas Fe-Cr-C solution forms when the degree of reduction is sufficiently high.

     

    Carbothermal reduction process of the Fe-Cr-O system

    Author Affilications
    • Funds: 

      the Fundamental Research Funds for the Central Universities of China (No.FRF-SD-12-009A)

      supported by the National Natural Science Foundation of China (No.51074025)

    • Received: 03 December 2012; Revised: 16 February 2013; Accepted: 21 February 2013;
    Understanding the reduction behaviors and characteristics of the end products of Fe-Cr-O systems is very important not only for maximizing the recovery of metals from stainless steel dust but also for the subsequent reuse in metallurgical process. The present work first predicted the possible products thermodynamically when FeCr2O4 was reduced by C. The reduction behaviors by graphite of three kinds of Fe-Cr-O systems, i.e., FeCr2O4, Fe2O3+Cr2O3, and Fe+Cr2O3, were then investigated in 1350–1550℃. Further, the microstructures of final products and element distribution conditions were examined. The results suggest that, thermodynamically, the mass of products for the carbothermal reduction of FeCr2O4 is a strong function of temperature, and the initial carbon content is used. More Fe-Cr-C solution and less residual carbon content are obtained at higher temperatures and lower nC:nO ratios (the initial molar ratio of C to O in the sample). Experimental data show that the sample amount tends to affect the reduction rate, and the residual carbon content strongly depends on nC:nO. With regard to the phases present in products during the reaction process, metal carbides tend to form in the initial stage, whereas Fe-Cr-C solution forms when the degree of reduction is sufficiently high.

     

    Relative Articles

    Chun-ming Ai, Ping-ping Sun, Ai-xiang Wu, Xun Chen, Chao Liu. Accelerating leaching of copper ore with surfactant and the analysis of reaction kinetics [J]. 矿物冶金与材料学报(英文版). DOI: 10.1007/s12613-019-1735-7

    View details

    Eltefat Ahmadi, Ahmad Fauzi, Hashim Hussin, Norlia Baharun, Kamar Shah Ariffin, Sheikh Abdul Rezan. Synthesis of titanium oxycarbonitride by carbothermal reduction and nitridation of ilmenite with recycling of polyethylene terephthalate (PET) [J]. 矿物冶金与材料学报(英文版). DOI: 10.1007/s12613-017-1425-2

    View details

    Wen Yu, Qiong-yao Tang, Jiang-an Chen, Ti-chang Sun. Thermodynamic analysis of the carbothermic reduction of a high-phosphorus oolitic iron ore by FactSage [J]. 矿物冶金与材料学报(英文版). DOI: 10.1007/s12613-016-1331-z

    View details

    Tu Hu, Xue-wei Lü, Chen-guang Bai, Gui-bao Qiu. Isothermal reduction of titanomagnetite concentrates containing coal [J]. 矿物冶金与材料学报(英文版). DOI: 10.1007/s12613-014-0875-z

    View details

    Saikat Samanta, Manik Chandra Goswami, Tapan Kumar Baidya, Siddhartha Mukherjee, Rajib Dey. Mineralogy and carbothermal reduction behaviour of vanadium-bearing titaniferous magnetite ore in Eastern India [J]. 矿物冶金与材料学报(英文版). DOI: 10.1007/s12613-013-0815-3

    View details

    Ai-min Chu, Ming-li Qin, Bao-rui Jia, Hui-feng Lu, Xuan-hui Qu. Carbothermal synthesis of Si3N4 powders using a combustion synthesis precursor [J]. 矿物冶金与材料学报(英文版). DOI: 10.1007/s12613-013-0696-5

    View details

    Ali Rasooli, Mehdi Divandari, Hamid Reza Shahverdi, Mohammad Ali Boutorabi. Kinetics and mechanism of titanium hydride powder and aluminum melt reaction [J]. 矿物冶金与材料学报(英文版). DOI: 10.1007/s12613-012-0533-2

    View details

    Jinxiong Lu, Li Wang, Jiongming Zhang, Xinhua Wang. Computer recognition of slag property diagrams in ternary systems [J]. 矿物冶金与材料学报(英文版).

    View details

    Huiqing Tang, Zhancheng Guo, Xingmin Guo, Shengbi Zhang. Kinetics of Carbothermic Reduction of MnO2 and Catalytic Effect of La2O3 [J]. 矿物冶金与材料学报(英文版).

    View details

    /

    返回文章
    返回