花生壳还原提钒尾渣制备铬铁合金的试验研究  

Experimental research on preparation of ferrochrome by reducing vanadium tailings with peanut shell

作　　者：郭锐 周密 谢华清 唐文博 王征宇[1] 胡鹏 GUO Rui;ZHOU Mi;XIE Huaqing;TANG Wenbo;WANG Zhengyu;HU Peng(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China;Pangang Group Research Insiture Co.,Ltd.,Panzhihua 617000,Sichuan,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]攀钢集团研究院有限公司,四川攀枝花617000

出　　处：《烧结球团》2022年第6期116-122,共7页Sintering and Pelletizing

基　　金：国家自然科学基金资助项目(52074081);中央高校基本科研业务费资助项目(N2225043)。

摘　　要：为解决目前提钒尾渣堆积造成的环境污染及资源浪费问题,实现固废资源化利用,本文将两种提钒尾渣按比例混合并添加花生壳作为还原剂在高温下进行还原,对还原产物进行X射线衍射、扫描电镜和化学定量分析,并对还原产物进行熔化分离,测定熔分产物的物相组成和化学成分。结果表明:花生壳还原提钒尾渣的最佳工艺参数下,吸氧比为4,还原温度为1 550℃,还原时间为3 h;还原产物的物相组成主要为金属铁、金属铬、Cr_(2)O_(3)、碳化铬、铬铁合金、NaCrS_(2)、SiO_(2)、硅酸钙相;熔分所得铬铁合金中铬质量分数为61.51%,铁质量分数为31.05%,元素质量分数满足FeCr65C4.0牌号合金的国家标准要求。In order to solve the problems of environmental pollution and resource waste caused by vanadium extraction tailings accumulation,and realize solid waste resource utilization,in this paper,two vanadium extraction tailings are mixed proportionally,and peanut shells are added as reducing agents to reduce at high temperature.The reduction products are analyzed by X-ray diffraction,scanning electron microscope and chemical quantitative analysis,and then melted and separated,and the phase composition and chemical composition of the melted products are determined.The results show that under the optimum technological parameters of reducing vanadium extraction tailings with peanut shells,the oxygen absorption ratio is 4,the reduction temperature is 1 550 ℃,and the reduction time is 3 h;The phase composition of the reduction product is mainly metallic iron,metallic chromium,Cr_(2)O_(3),chromium carbide,ferrochrome,NaCrS_(2),SiO_(2) and calcium silicate phase.The mass fraction of chromium and iron in the melted ferrochrome is 61.51% and 31.05% respectively,and the element content meets the requirements of the national standard of FeCr65 C4.0 alloy.

关 键 词：提钒尾渣 生物质 还原 资源化利用 铬铁合金 

分 类 号：TF09[冶金工程—冶金物理化学] TF557