沸腾氯化用高品质金红石的生产工艺

来源期刊:中国有色金属学报2010年第z1期(下册)

论文作者:熊雪良 杨智 欧阳红勇 王康海

文章页码:981 - 985

关键词:钛铁矿;氧化预处理;流态化浸出;人造金红石;沸腾氯化

Key words:ilmenite; oxidation-modified; fluidization leaching; synthetic rutile; fluidizing chlorination

摘    要:对原矿、氧化改性矿、还原改性矿3种矿物进行搅拌浸出、加压浸出和流态化浸出3种方式的浸出工艺研究。结果表明:采用搅拌浸出时,3种矿物浸出产品人造金红石中TiO2含量从大到小的次序为氧化改性矿、还原改性矿、原矿;3种浸出工艺得到人造金红石中TiO2含量从大到小的次序为流态化浸出、加压浸出、搅拌浸出;氧化改性矿的矿物表面生成了新的金红石相;钛铁矿采用氧化预处理—盐酸流态化浸出工艺,得到的产品人造金红石是金红石型TiO2,其中TiO2含量(质量分数)为92.96%,CaO+MgO含量为0.30%,粒度大于100 μm的占94%,产品人造金红石是沸腾氯化生产的理想原料。

Abstract: Three samples i.e. ilmenite, oxidation-modified ilmenite and reduction-modified ilmenite were leached by agitation leaching, pressure leaching and fluidization leaching. The results show that descending order of TiO2 content of products is oxidation-modified ilmenite, reduction-modified ilmenite and ilmenite when three samples are leached by agitation leaching. The maximum TiO2 content of product is obtained by fluidization leaching. The second is obtained by pressure leaching, and the minimum is obtained by agitation leaching. A new rutile phase appears on the surface of mineral by oxidation treating. The synthetic rutile produced from ilmenite by oxidation and fluidization acid leaching has characteristics as rutile-type titanium(IV) dioxide, with TiO2 content of 92.96%, CaO and MgO total content of 0.30%, 94% particle with size bigger than 100 μm, which is the ideal raw material of fluidizing chlorination process.

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