摘要
酸洗污泥产量大、污染严重且难处理,常规固化填埋占用土地且浪费资源,将酸洗污泥配入电炉作为造渣剂使用,在生产中回收其中金属铁、铬和镍,并发挥CaO、CaF2等辅料功能,可实现污泥在冶金过程的资源化利用。通过FactSage热力学软件计算发现酸洗污泥中的金属铁、铬和镍绝大部分可回收进入金属液中,且金属液硫质量分数最高为0.014%,不会使金属液增硫。在此基础上,将酸洗污泥制成混合造渣剂,通过静态试验与吹氧熔炼试验发现,当造渣剂与酸洗污泥质量比为1∶1时,硫质量分数能够满足钢液要求,铬、镍回收率分别为66.04%和97.90%。
The stainless steel pickling sludge has the characteristics of large yield,serious pollution and difficult disposal. Conventional solidified landfills occupy land and waste resources. The stainless steel pickling sludge is recycled in the steelmaking process as the slagging flux so as to recycle valuable metals of Fe,Cr,and Ni and play the functions of CaO and CaF2. Finally it will achieve the utilization of sludge resources. Thermodynamics calculation by FactSage showed that most valuable elements including Fe,Cr and Ni in the pickling sludge could be recycled into the molten metal,and the sulfur mass percent of the molten metal was up to 0.014%,which would not increase the sulfur mass percent in the molten steel. On this basis,the pickling sludge was made into a mixed slag-forming agent,and static experiments and oxygen blown experiments indicated that the sulfur mass percent could meet the requirement of molten steel,and the recovery rate of valuable metals such as Cr and Ni could reach 66.04% and 97.90% respectively when the ratio of the slagging agent and the pickling sludge was 1∶1.
作者
李小明
王建立
吕明
尹卫东
崔雅茹
赵俊学
LI Xiao-ming;WANG Jian-li;LU Ming;YIN Wei-dong;CUI Ya-ru;ZHAO Jun-xue(School of Metallurgical Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,Shaanxi,China)
出处
《钢铁》
CAS
CSCD
北大核心
2019年第3期96-101,共6页
Iron and Steel
基金
国家自然科学基金资助项目(51574189
51774224
51604210)
关键词
不锈钢酸洗污泥
炼钢
造渣剂
stainless steel pickling sludge
steelmaking
slagging flux
