摘要
研究了盐酸浸出赤泥中杂质成分制备富钛渣的方法,考察了盐酸浓度、浸出温度、液固比和浸出时间对富钛渣中TiO_2品位的影响,通过ICP-AES和XRD检测手段分析了该酸浸过程的物相变化和作用机理。结果表明,在盐酸浓度30%、浸出温度80℃、液固比7∶1和浸出时间60min的条件下,富钛渣中TiO_2品位可达24%。随着盐酸浓度的提高,赤泥中方解石消失,赤铁矿、钙霞石和钙钛矿逐渐溶解,而板钛矿和石英基本没有溶解。
The preparation method of Ti-enriched slag was studied by hydrochloric acid leaching of impurities from red mud. The effects of hydrochloric acid concentration, leaching temperature, liquid-solid ratio and leaching time on titanium dioxide grade of Ti-enriched slag were investigated. Phase transformation and action mechanism of the acid leaching process were analyzed by ICP-AES and XRD. The results show that under the conditions of hydrochloric acid concentration of 30%,leaching temperature of 80 ℃,liquidsolid ratio of 7 ： 1 and leaching time of 60 min, the titanium dioxide grade of Ti-enriched slag can reach 24 %. With the increase of concentration of hydrochloric acid, calcite in the red mud disappears, the hema- tite,cancrinite and perovskite gradually dissolve, but the brookite and quartz haraly dissolved.
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2016年第4期25-27,72,共4页
Rare Metals and Cemented Carbides
基金
河南省高等学校重点科研项目(15A440014
16A530006)
河南省高校基本科研业务探索性项目(NSFRF140112
NSFRF140601)
关键词
赤泥
富钛渣
TIO2
化学选矿
盐酸浸出
物相变化
作用机理
red mud
Ti-enriched slag
TiO2
chemical beneficiation
hydrochloric acid leaching
phase transformation
action mechanism
