东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (12): 1738-1741.DOI: -

• 论著 • 上一篇    下一篇

稀酸浸出还原焙烧红土矿时铁还原度对浸出的影响

畅永锋;翟秀静;符岩;张廷安;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-12-15 发布日期:2013-06-22
  • 通讯作者: Chang, Y.-F.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50774020)

Effect of iron reduction degree on leaching results of pre-reduced laterite ores with thin acid

Chang, Yong-Feng (1); Zhai, Xiu-Jing (1); Fu, Yan (1); Zhang, Ting-An (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-12-15 Published:2013-06-22
  • Contact: Chang, Y.-F.
  • About author:-
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摘要： 对含镍的红土矿进行了微波加热还原焙烧-稀硫酸浸出的实验研究,考察了活性炭粉加入量、微波功率和加热时间对铁还原程度的影响,并分析了铁还原度对浸出过程中镍和铁浸出率的影响.结果表明红土矿中铁的还原程度随碳粉加入量、微波功率和加热时间的增加而增大,在800 W的微波功率下加热约12.5 min即可完成还原反应.镍的浸出率与铁的还原度近似呈线性关系,但铁的浸出率在铁还原度超过60%后增长迅速.因此铁还原度控制在60%为宜,相应的镍浸出率约为85%,而铁的浸出率不超过30%.

关键词: 红土矿, 氧化矿, 镍, 还原焙烧, 浸出

Abstract: The Ni-bearing laterite ores were investigated experimentally by reducing roasting through microwave heating then leaching out in thin sulfuric acid. The effects of the amount of active carbon powder added in, microwave power and heating time on the reduction degree of iron oxide in the ores were tested, as well as the effect of iron oxide reduction degree on the leaching rates of nickel and iron. The results showed that the iron reduction degree in the ores increases with the added amount of active carbon powder, microwave power and heating time. For example, the reduction reaction process can be completed under 800 W for 12.5 min. The relationship between leaching rate of nickel and iron reduction degree is nearly linear, but the leaching rate of iron will rapidly increase if the iron reduction degree exceeds 60%. So, it is better to control the iron reduction degree to be 60%. Correspondingly, the leaching rate of nickel and iron is about 85% and not over 30%, respectively.

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