钒钛磁铁矿钙化焙烧-酸浸提钒过程中钒铁元素的损失

doi:10.11949/j.issn.0438-1157.20140658

化工学报 ›› 2015, Vol. 66 ›› Issue (3): 1019-1025.DOI: 10.11949/j.issn.0438-1157.20140658

钒钛磁铁矿钙化焙烧-酸浸提钒过程中钒铁元素的损失

郑海燕¹, 孙瑜¹, 董越¹, 沈峰满¹, 谷健²

1 东北大学材料与冶金学院, 辽宁沈阳 110819;
2 太原钢铁(集团)有限公司, 山西太原 030003

收稿日期:2014-04-24 修回日期:2014-12-11 出版日期:2015-03-05 发布日期:2015-03-05
通讯作者: 郑海燕
基金资助:
国家自然科学基金项目(51074040,51374061);辽宁省自然科学基金项目(201202064);中央高校基本科研业务费项目(N120402004)。

Loss of vanadium and iron in calcified roasting and acid leaching of vanadium-bearing titanomagnetite

ZHENG Haiyan¹, SUN Yu¹, DONG Yue¹, SHEN Fengman¹, GU Jian²

1 School of Material & Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China;
2 Taiyuan Iron and Steel (Group) Company Limited, Taiyuan 030003, Shanxi, China

Received:2014-04-24 Revised:2014-12-11 Online:2015-03-05 Published:2015-03-05
Supported by:
supported by the National Natural Science Foundation of China (51074040, 51374061), the Natural Science Foundation of Liaoning Province (201202064) and the Fundamental Research Funds for the Central Universities (N120402004).

摘要/Abstract

摘要：

在理论分析的基础上,以钒钛磁铁矿为原料,硫酸钙为钙化剂,系统研究了钙化焙烧和硫酸酸浸过程的钒、铁等有价组元的损失。研究结果表明:钙化焙烧-酸浸提钒工艺在理论上是可行的;焙烧过程中,烧结产物中的钒损失率随温度的升高而升高;尽管焙烧过程损失了部分钒元素,但焙烧后钒元素更易于溶解浸出;钒浸出率随焙烧温度的升高先升高后降低且1450 K时达到最大值;当硫酸浓度增加时,钒浸出率变化不大;当焙烧温度高于1450 K时,浸出渣中铁的损失率快速上升,硫酸浓度增加时,其值随之增大;控制适当条件可强化钒的有效迁移,目前实验室研究条件下,钒的浸出率最大可达79.08 %,而此时铁的损失率为3.32%。

关键词: 钒钛磁铁矿, 钙化焙烧, 浸取, 损失率, 溶解性, 分离

Abstract:

Based on the principle of calcified roasting and E-pH diagram of acid leaching, the loss of vanadium and iron in calcified roasting and acid leaching were investigated with vanadium-bearing titanomagnetite as raw material and calcium sulfate as calcification agent. The vanadium extraction process combining calcified roasting and acid leaching was feasible in theory. The loss ratio of vanadium in pellets increased with increasing temperature in the calcified roasting process. Despite some loss of vanadium the calcified roasting process was favorable to the subsequent acid leaching of vanadium. The leaching ratio of vanadium increased with increasing roasting temperature below 1450 K. The leaching ratio reached a maximum at 1450 K, and then it decreased. The leaching ratio of vanadium had no obvious change with increasing sulfuric acid concentration. At the same time, the loss ratio of iron in the leaching process increased rapidly when roasting temperature was higher than 1450 K, and it also increased with increasing concentration of sulfuric acid. By controlling experimental conditions, the leaching ratio of vanadium in vanadium-bearing titanomagnetite could reach 79.08% but the loss ratio of iron was 3.32%.

Key words: vanadium-bearing titanomagnetite, calcified roasting, leaching, loss ratio, solubility, separation

中图分类号:

TF841.3

郑海燕, 孙瑜, 董越, 沈峰满, 谷健. 钒钛磁铁矿钙化焙烧-酸浸提钒过程中钒铁元素的损失[J]. 化工学报, 2015, 66(3): 1019-1025.

ZHENG Haiyan, SUN Yu, DONG Yue, SHEN Fengman, GU Jian. Loss of vanadium and iron in calcified roasting and acid leaching of vanadium-bearing titanomagnetite[J]. CIESC Journal, 2015, 66(3): 1019-1025.

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钒钛磁铁矿钙化焙烧-酸浸提钒过程中钒铁元素的损失

Loss of vanadium and iron in calcified roasting and acid leaching of vanadium-bearing titanomagnetite

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