LF精炼废渣中硫赋存形式的研究

以CaO，SiO2和A12O3为主要原料，分别制备了CaO-A12O3二元和CaO-SiO2-A12O3三元渣样，分析了炉渣通过水冷及随炉冷却时渣中硫的赋存形式.研究结果表明:在12CaO·7A12O3为基体的CaO-A12O3二元渣中，硫在水冷及随炉冷却时主要以11CaO·7A12O3·CaS固溶体的形式存在；在CaO-SiO2-A12O3三元渣中，当A12O3的含量较低时，硫在水冷及随炉冷却时均以CaS的形式存在；当A12O3的含量较高时，硫在水冷时以CaS的形式存在，但在随炉冷却时则以11CaO·7A12O3·CaS固溶体的形式存在.通过改变成分和冷却方式可以控制精炼废渣中硫的赋存形式.

Research on the Occurrence Form of Sulfur in LF Refining Slag

(CaO A12O3)slag and(CaO SiO2 A12O3)slag were synthesized with CaO， SiO2 and A12O3 as main raw materials. The occurrence form of the sulfur in the slag under different cooling methods such as water cooling and furnace cooling was investigated. The results showed that 11CaO·7A12O3·CaS solid solution is the main occurrence form of sulfur in the CaO A12O3 slag with the substrate of 12CaO·7A12O3. However，in the CaO SiO2 A12O3 slag， when the A12O3 content was low， sulfur existed in the form of CaS single phase in both water and furnace cooling processes， while the A12O3 content was high， sulfur existed in the form of CaS single phase when the slag was water cooled， while when the slag was furnace cooled， the sulfur existed in the form of 11CaO·7A12O3·CaS solid solution. The occurrence form of sulfur in LF refining slags can be controlled by changing the cooling method and the composition of the slag.