Heavy metal pollution risk for beneficial reuse of stainless steel slag

摘要：

The feasibility of beneficial reuse of two kinds of stainless steel slag (EAF slag and AOD slag)and their heavy metal contamination were studied.The results indicate that the main elements (＞1%)in the EAF slag were Ca,Si,Mg,Al,Fe,O,and Cr,existing as Ca2 SiO4 and Ca3 Mg (SiO4)2,while the AOD slag was mainly composed of Ca,Si,Mg,C,and O,and the main minerals were Ca2 SiO4,CaCO3,and Ca(OH)2.The slags were suitable for beneficial reuse.The leaching concentrations of heavy metals by the leaching tests (GB5085.6-2007 and TCLP)were far lower than the related limit values for hazardous waste,and most of the heavy metals existed as stable speciation.The availability leaching test result shows that Cr could possibly leach out at the worst scenario,but mainly as the less hazardous Cr(Ⅲ),which was confirmed by the XRD analysis result.Therefore,the heavy metals in the stainless steel slags posed little pollution risk.

关键词： stainless steel slag heavy metals leaching pollution risk

作者: Zhang Hua He Pinjing Zhang Xiangyu Shao Liming Wang Ruyi Chen Ronghuan

作者单位: State Key Laboratory of Pollution Control & Resources Reuse,College of Environmental Science and Eng Baosteel Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China

会议类型: 国际会议

会议名称: 第三届宝钢学术年会(Baosteel BAC 2008)

会议地点: 上海

会议语种:英文

页码: 1240-1243

在线出版日期: 2008-09-26（万方平台首次上网日期，不代表论文的发表时间）