中文摘要：

以攀钢含钛高炉渣为研究对象，探讨了盐酸浸出过程中Ti、A1、Mg、Ca、Si等各元素行为。考察了盐酸浓度、反应温度、液固比、粒度等因素对钛富集率及杂质去除率的影响。X射线衍射图显示，含钛高炉渣主要由钙钛矿、镁钙及铝钙复杂硅酸盐物相组成。浸出过程中，硅酸盐中的活性硅逐渐溶解并析出形成H2Si03，H2Si03可与水解形成的钛水合物发生共沉淀。试验结果表明：盐酸浓度、温度以及液固比等对钛在渣中的富集有显著影响，共沉淀可促进钛渣水解，提高钛在渣中的富集率。在液固比20：1、温度80℃的条件下，采用5mol／L的盐酸,反应90min后，可将粒度150／75μm的高炉渣中96％左右的钛富集到渣中，获得钛含量超过37％的酸浸渣。

英文摘要：

The some element behaviors in blast - furnace slag with Ti from Panzhihua Iron and Steel Corporation during in hydrochloric acid leaching was discussed such as Ti, Al, Mg, Ca, Si and so on, the influence of hydrochloric acid concentration, reaction temperature, liquid -solid ratio and particle size on enrichment ratio of titanium and removal efficiencies were investigated. The XRD patterns showed that blast - furnace slag with Ti mainly consisted of CaTiO3 , Ca2 Mg （ Si2O7 ） and Ca2 Al （AlSi） O7. In the leaching process, the active silicon in mineral gradually dissolved and then precipitated in the form of H2SiO3 ,H2SiO3 could coprecipitate with hydrolyzed titanium hydrate. The results showed that hydrochloric acid concentration, reaction tempera- ture and liquid - solid ratio had significant influence on enrichment of titanium in slag. Coprecipitation contributed to the hydrolysis of slag with Ti and in- creased enrichment ratio of titanium in slag. The maximum recovery yield of titanium about 96% was obtained and the content of titanium in acid leaching residue exceeded 37% using 150/75μm particle size at a reaction temperature of 80℃ and liquid - solid ratio of 20：1 for 90min reaction time with 5tool/ L hydrochloric acid concentration.