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碳镁球团复合脱氧脱硫剂中CaO、MgO、SiO_2的测定

Shandong Metallurgy(2013)

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Abstract
试样用碱熔剂熔融,稀盐酸浸取酸化、定容。移取部分试液,通过调节控制分析时各元素的酸度,利用钙镁与EGTA络合常数的对数相差5.8,在镁存在的情况下,用EGTA直接滴定钙,以EGTA掩蔽钙后,用CyDTA直接滴定镁,再用硅钼蓝光度法测定SiO2量,实现了CaO、MgO、SiO2同一母液联合快速分析。应用本法对碳镁球团中的MgO、CaO、SiO2进行测定,结果满意,RSD分别≤0.24%、2.82%和2.93%。
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Key words
MgO,compleximetry,photometry,CaO,SiO2,carbon-magnesia pellet
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