矿产综合利用Issue(5)：70-75,6.DOI:10.3969/j.issn.1000-6532.2017.05.015
钢渣中游离氧化镁含量的测定及其减量控制措施
Determination and Reduction of Free Periclase in Steel Slag
摘要
Abstract
The poor stability derives from the hydration expansion of free periclase,which hinders the recycled utilization of steel slag as a partial replacement of cement.In the study,ammonium chloride-glycol extraction method has been optimized to determine precisely f-MgO content in steel slag.The results indicate that MgO component existing as RO and MgFe2O4 phase as well as other compositions in BOF slag show no influence on extraction and titration process,demonstrating the high accuracy of the method.Moreover,the mixture of iron tailings and limestone were used to modify the slag at high temperature.Under the modification at 1350℃ and water-cooling treatment,the free periclase content was decreased by 55.94％,from 2.02％ to 0.89％.The results indicate that high temperature modification is a promising way to reduce significantly the content of f-MgO and improve the stability of BOF slag.关键词
钢渣/安定性/游离氧化镁/滴定/高温改性Key words
Steel slag/Stability/Free periclase/Extraction/High temperature modification分类
矿业与冶金引用本文复制引用
马来君,连芳,王瀚霄,张作顺..钢渣中游离氧化镁含量的测定及其减量控制措施[J].矿产综合利用,2017,(5):70-75,6.基金项目
国家“十二五”科技支撑计划(2011BAB03B05)资助 （2011BAB03B05）
