提高不锈钢粉尘铬还原回收效率研究  

Study of improving of chromium recovery in stainless steel dust

作　　者：贾昕磊 张延玲[1] 郭文明[1] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083

出　　处：《炼钢》2016年第2期69-73,共5页Steelmaking

基　　金：国家自然科学基金资助项目(51074025)

摘　　要：为高效回收不锈钢粉尘中的铬元素,进行不锈钢粉尘块中配加碳、硅铁和铝作为还原剂的实验室研究。研究结果表明:用单一碳作还原剂,碳氧物质的量比为1.0时能获得较好的渣金分离效果,碱度为1.17时残渣中铬含量最小。在配碳的基础上添加硅铁,铬的收得率可达96.39%,且渣中铬残余含量低于0.48%;配碳的基础上添加铝,铬收得率为93.36%。For exploring a efficient way to separate and recycle the chromium metallic resources in stainless steel dust,laboratory research by adding carbon, ferrosilicon and aluminum as reductants to stainless steel dust pellets were carried out. The results show that when only using carbon as reductant, the separation of alloy and slag in the reduction products is good at nc： no = 1.0, and chromium content in slag develops to its minimum at slag basicity of 1.17. The recovery ratio of chromium reach as high as 96.39 % and residual mass fraction of chromium in the slag was reduced to 0.48 % by adding ferrosilicon on the basis of the dust with carbon. The recovery ratio of chromium was enhanced to 93.36 % when adding carbon and aluminum to dust.

关 键 词：不锈钢粉尘 铬 分离效果 回收率 

分 类 号：X757[环境科学与工程—环境工程]