Existence Forms of Magnesium Oxide in Steel Slag by Chemical Phase Separation

摘要：

Magnesium oxide solid dissolved in silicate phase, mesophase and RO-phase which are the major constituents of steel slag. The MgO exists in the steel slag with complex forms,which results in the bad soundness of the steel slag. In this paper,the silicate phase and mesophase were separated by salicylic acid methanol solution and potassium hydroxidesucrose solution respectively and were studied combining with the XRD and SEM. The results show that the silicate phase and mesophase can be fully dissolved,however,the RO phase is not influenced by the two solutions in this process. The content of magnesium oxide existed in different minerals can be detected by chemical analysis. It can be found that the magnesium oxide mainly exists as RO-phase in steel slag,and some of them exist as free state, while only a small quantity of solid dissolve in the silicate phase and mesophase.

关键词： Salicylic acid methanol solution Potassium hydroxide-sucrose solution Steel slag

作者: Li Zhaofeng Zhou Zonghui Shan Lifu

作者单位: Engineering Research Center of Advanced Building Materials,Ministry of Education,University of Jinan,Jinan 250022,China

会议类型: 国际会议

会议名称: Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)

会议地点: 南昌

会议语种:英文

页码: 481-484

在线出版日期: 2010-04-28（万方平台首次上网日期，不代表论文的发表时间）