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炉渣材料代替水泥是一个很好的选择。特别是电弧炉(EAF)熔融过程中产生的炉渣,可作为填埋道路场地和生产混凝土的材料。但是炉渣中含有污染性的化学元素,如铬、钡、钒、钼等,使其应用受到限制。本文对两个生产钢筋的意大利炼钢厂的炉渣进行了测试。结果表明,炉渣的化学成分在一个范围内,且在此范围内炉渣显示了一个释放行为;基本组分(如CaO、SiO2、Al2O3、MgO等)的比例对炉渣的释放行为有着显著影响。采用光学碱度法表征了材料的化学成分;并采用扫描电子显微镜研究了炉渣的显微结构,确认了炉渣中存在的主要物相、化学成分和溶解在每一物相中的污染元素。对化学分析、显微结构分析和释放性试验结果进行综合分析,确定了具体的化学成分范围来预防危险的化学释放,这种分析方法为确定正确处理炉渣的程序具有重要的指导意义。
Slag material instead of cement is a good choice. In particular, slag produced in the EAF melting process can be used as a landfill site and in the production of concrete. But the slag contains contaminative chemical elements, such as chromium, barium, vanadium, molybdenum, etc., which make its application is limited. This article tested the slag from two steelmaking plants in Italy. The results show that the chemical composition of the slag is in a range, and within this range the slag shows a release behavior; the proportion of basic components (such as CaO, SiO2, Al2O3, MgO, etc.) has a significant impact on the release behavior of the slag. The chemical composition of the material was characterized by optical basicity method. The microstructure of slag was studied by scanning electron microscope. The main phase, chemical composition and the dissolved elements dissolved in each phase were confirmed. Comprehensive analysis of chemical analysis, microstructure analysis and release test results to determine the scope of the specific chemical composition to prevent dangerous chemical release, this analysis method for determining the correct treatment of slag procedures of great significance.