混合酸浸法分离含钛高炉渣中的主要成分

Separation of the Main Components from Ti-bearing Blast Furnace Slag by Mixed Acid Leaching Method

根据含钛高炉渣的结构和组分的化学性质特点,采用低温盐酸硫酸混合酸浸法将高炉渣中的钛组分富集于滤渣中,钙、铝、镁、铁等酸溶性组分富集于滤液中,研究了混合酸浓度、盐酸/硫酸配比、反应温度等对组分分离效果的影响.结果表明,采用混合酸浓度为6mol/L、盐酸与硫酸体积比为3:1的混合酸、酸渣质量比为1.2:1条件下,混合酸与含钛高炉渣在80℃反应5h后,滤渣中TiO2含量可达30%以上.

Based on the structural and composition characteristics of titanium-bearing blast furnace slag,a low temperature mixed acid leaching method was used to separate acid-soluble components from the slag into the filtrate.So the titanium was enriched relatively,the resulting titanium-rich materials could be used for industrial production.The influences of the experimental factors（mixed acid concentration,hydrochloric acid/sulfuric acid ratio,reaction time,reaction temperature and mass ratio of slag to mixed acid） on separation of its components were investigated.The results showed that an enriched residue with over 30% TiO2 could be obtained by the mixed acid leaching method and the optimum conditions were mixed acid concentration 6 mol/L（volume ratio of HCl/H2SO4=3：1）,at 80℃ for 5 h,and mass ratio of acid to the slag at 1.2：1.