碳酸盐法测定钢渣中活性氧化镁含量  

Determination of Active MgO in Steel Slag by Carbonate Method

作　　者：杜君[1] 刘家祥[1] 柳倩[1] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室材料电化学过程与技术北京市重点实验室,北京100029

出　　处：《理化检验（化学分册）》2015年第3期281-285,共5页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国家自然科学基金(51174011)

摘　　要：采用碳酸盐法测定钢渣中活性氧化镁含量。研究了碳酸盐法测定钢渣中活性氧化镁反应的可行性和测定的准确性。结果表明:二氧化碳在水中可以将氧化镁和氢氧化镁转化成可溶性镁离子,然后用EDTA标准溶液滴定其含量,氧化镁、氢氧化镁与二氧化碳的反应率均达到97%以上;二氧化碳与钢渣反应时间应大于105min,新余热焖钢渣中活性氧化镁质量分数为1.44%;压蒸后钢渣中氢氧化镁质量分数为1.86%,与原钢渣中活性氧化镁测定结果保持一致,相对误差小于1%。Carbonate method was applied to the determination of active MgO in steel slag.The feasibility and accuracy of this mehod was studied.It was found that MgO and Mg(OH)2 were converted to magnesium ion by reacting with CO2 in water,and then the magnesium ion was detected using EDTA standard solution.The reaction yields were higher than 97%.The reaction time of CO2 with raw steel slag should be more than 105 min,and the mass fraction of active MgO of Xinyu steel slag was 1.44%.The mass fraction of Mg(OH)2 of steel slag after autoclave test was 1.86%,which was in agreement with the value of active MgO in raw steel slag,and the relative error was lower than 1%.

关 键 词：碳酸盐法 钢渣 活性氧化镁 游离氧化镁 

分 类 号：O652[理学—分析化学] TQ172.44[理学—化学]