ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2007, Vol. 28 ›› Issue (2): 7-9.

• 试验研究 • 上一篇    下一篇

碳、硅铁及碳化硅对白钨矿还原动力学的影响

郭培民,赵沛,李正邦   

  1. 钢铁研究总院先进钢铁流程及材料国家重点实验室 北京 100081
  • 收稿日期:2006-08-31 出版日期:2007-04-01 发布日期:2023-03-09
  • 作者简介:郭培民(1975-),男,博士,高级工程师,从事低温冶金、直接合金化及钒钛磁铁矿等资源综合利用研究。
  • 基金资助:
    国家自然科学基金资助项目(编号:50474006)

Effect of Carbon, Ferrosilicon and Silicon Carbide on Scheelite Reduction Kinetics

Guo Peimin, Zhao Pei , Li Zhengbang   

  1. The State Key Laboratory for Advanced Iron and Steel Process and Products, Central Iron and Steel Research Institute, Beijing 100081
  • Received:2006-08-31 Published:2007-04-01 Online:2023-03-09

摘要: 在实验室用15 kW碳管炉进行碳粉、硅铁粉(75%Si)、碳化硅粉对白钨矿粉(67.25%WO3)还原动力学影响的研究。结果表明,碳还原白钨矿的反应级数为二级,反应表观活化能为234.6 kJ/mol;碳在较低温度下,反应性能差,当温度达到1 400℃时,反应剧烈;随温度升高,硅铁的还原性能比较平稳,反应产生SiO2,使渣量增加;碳化硅高温反应性能好(≥1 400℃);碳和硅铁适合较低合金化率(3%W),碳化硅适宜用于较高的合金化率(≥5%W)。

关键词: 白钨矿, 碳, 硅铁, 碳化硅, 还原动力学 

Abstract: The research of effect of carbon powder, ferrosilicon (75% Si) powder and silicon carbide powder on scheelite (67. 25% W03) powder reduction kinetics has been carried out by 15 kW carbon tube furnace in laboratory. The results showed that scheelite reduced by carbon was second order reaction and the apparent activation energy was 234. 6 kj/mol; the reactivity of carbon was poor at low temperature, but its reaction rate increased obviously at temperature up to 1 400 ℃. The reactivity of ferrosilicon was steady with increasing temperature, and reaction product was SiO2 to increase slag amount. The reactivity o£ silicon carbide was good at temperature N1 400 ℃. Carbon and ferrosilicon are available for low alloying ratio (3%W) and silicon carbide is suitable for higher alloying ratio (N5%W).