不锈钢尾渣重金属回收工业实验与应用

Industrial experiment and application on heavy metal recovery of stainless steel tail slag

为降低堆存不锈钢尾渣重金属浸出危害和生产钢渣肥料,进行了重金属湿法回收工业实验。实验结果表明,金属品位和综合回收率可达到86%、95%;Cr、Ni平均回收率可达到90%。将研究成果运用到山西太钢不锈钢尾渣处理工程实践上,取得了良好的效果。通过对工艺流程和调试过程的介绍,从重金属矿物相组成和分选机理入手,分析了工艺特点和影响因素,为工艺推广应用提供了参考。

Industrial experiments on the hydrometallurgical recovery of heavy metals were carried out to identify ways to prevent heavy metal leaching from stainless steel tail slag and provide a scientific basis for producing steel slag fertilizers. The results showed that the comprehensive recovery percentages for metals could reach up to 86% to 95% with the process described in this paper. The average recovery percentages for Cr and Ni were about 90%. The process was applied to treat stainless steel tail slag at the Taiyuan Stainless Co. Ltd.,successfully. Based on mineralogical phase components of heavy metals and separation mechanisms,technological characteristics and influencing factors of the process were analyzed,and techniques for debugging are described herein. All the results should provide a good reference for widespread applications of the process.