攀枝花钛精矿中CaO赋存状态及对人造金红石品质的影响

Occurrence State of CaO in Panzhihua Ilmenite and Its Influence on the Quality of Synthetic Rutile

采用XRD、扫描电镜对攀枝花钛精矿、攀枝花钛精矿制备人造金红石进行深度剖析,得出CaO在攀枝花钛精矿中主要与SiO2、MgO、FeO、TiO2等物质固溶于钛铁矿伴生相硅酸盐中。在生产人造金红石工艺中通过高温强氧化还原改性,盐酸浸出等方法均不能有效打破其结构,导致CaO在人造金红石产品中富集,影响产品质量。提出通过深度解粒,调整钛精矿选别工艺参数,可有效降低钛精矿中CaO含量,生产出高品质的人造金红石。也可通过高梯度磁选处理富钛料去除CaO杂质元素,生产满足国际大型沸腾氯化炉需要的人造金红石产品。

The phase structure and morphology of Panzhihua ilmenite and the synthetic rutile produced by Panzhihua ilmenite were deeply analyzed by XRD and SEM.It shows that CaO mainly dissolves with SiO2, MgO, FeO and TiO2 in silicate accompanying phase of the ilmenite. During the production of synthetic rutile,the silicate cannot be destructed by high-temperature redox modification and hydrochloric acid leaching, which leads to the enrichment of CaO in synthetic rutile and further influence on the quality of synthetic rutile.lt is proposed that CaO in the ilmenite can be effectively removed and high-quality synthetic rutile can be produced by deeply grinding and adjusting the beneficiation parameters for the ilmenite.Cao component can also be separated by high gradient magnetic concentration of titanium-rich material to produce synthetic rutile satisfying the requirements for international large-scale boiling chlorination furnace.