微波硅热还原铬铁矿粉制备低碳铬铁

李磊; 朱红波; 彭金辉; 张利波; 代林晴; 吴奎霖

doi:10.7513/j.issn.1004-7638.2015.04.024

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微波硅热还原铬铁矿粉制备低碳铬铁

doi: 10.7513/j.issn.1004-7638.2015.04.024

云南省特种冶金重点实验室, 微波能工程应用及装备技术国家地方联合工程实验室, 省部共建复杂有色金属资源清洁利用国家重点实验室, 昆明理工大学冶金与能源工程学院, 云南昆明 650093

基金项目:

云南科技创新人才计划-科技领军人才(NO.2013HA002)资助。

详细信息

作者简介:
李磊(1990-),江苏泰兴人,硕士研究生,主要从事微波冶金研究工作。

中图分类号: TF641,TM924.76
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- 被引次数: 0
出版历程
- 收稿日期: 2015-05-13

Preparation of Low-carbon Ferrochromium from Chromite Fines by Microwave Silicothermic Reduction

Yunnan Provincial Key Laboratory of Intensification Metallurgy, National Local Joint Engineering Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China

摘要

摘要: 为高效利用铬铁矿粉,提出微波硅热还原铬铁矿粉冶炼低碳铬铁新工艺。采用FactSage软件对三元渣系(SiO₂-CaO-Cr₂O₃)和二元渣系(SiO₂-CaO)进行模拟,在模拟值基础上通过试验找出最佳工艺条件。结果表明:终点温度1 450℃,渣系二元碱度1.64条件下,反应过程中渣金可以实现良好分离,铬回收率达到81.03%。对产物物相和化学成分进行XRD、XRF分析可知,合金中不含渣相,其化学成分满足FeCr55C25 Ⅱ牌号的要求。通过合金典型区域SEM图和X-射线能谱分析发现晶粒中含有少量Si杂质,碳主要存在于晶界上。
- 铬铁矿 /
- 微波加热 /
- 硅热法 /
- 熔渣 /
- 低碳铬铁
Abstract: To achieve chromite fines resources utilization effectively,the new process of preparation of low-carbon ferrochromium from chromite fines by microwave silicothermic reduction was investigated.FactSage software was used to simulate the ternary slag （SiO₂-CaO-Cr₂O₃） and the binary slag （SiO₂-CaO）,in order to generate the optimum technological conditions in combination with experimental data.The results show that with combining parameters of final temperature at 1 450 ℃ and binary basicity of 1.64,ferrochrome and slag can be entirely separated during the reaction and the recovery of chromium reach to 81.03%. XRD and XRF analysis on the phase and chemical composition of the products indicate that ferrochrome does not contain the slag and its chemical composition meet the standard of FeCr55C25 Ⅱ. SEM observation and EDX analysis show that crystalline grain contains tiny amounts of Si and C mainly distribute in the grain boundary.
- chromite /
- microwave heating /
- silicothermic reduction /
- melts slag /
- low-carbon ferrochromium