Preparation of Ti-rich material from titanium slag by activation roasting followed by acid leaching  

钛渣活化焙烧酸浸制备富钛料(英文)

作　　者：刘水石[1] 郭宇峰[1] 邱冠周[1] 姜涛[1] 陈凤[1] 

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第4期1174-1178,共5页中国有色金属学报（英文版）

基　　金：Project(NCET-10-0834) supported by the Program for New Century Excellent Talents in University,China

摘　　要：A method of activation roasting followed by acid leaching using titanium slag was introduced to prepare Ti-rich material. The effects of HaPO4 dosage, roasting temperature, and roasting time on TiO2 grade were investigated. A Ti-rich material containing 88.54% TiO2, 0.42% （CaO＋MgO） was obtained when finely ground titanium slag was roasted with 7.5% H3PO4 at 1000 ℃ for 2 h, followed by a two-stage leaching in boiling dilute sulfuric acid for 2 h. The XRD patterns show that the product is titanium dioxide with a rutile structure. Mechanism studies show that structures of anosovite solid solution and silicate minerals are destroyed in the roasting process. As a result, titanium components in titanium slag are transformed into TiO2 （futile） while impurities are transformed into acid-soluble phosphate and quartz.提出了一种钛渣活化焙烧酸浸制备富钛料的方法,对磷酸用量、焙烧温度和焙烧时间对富钛料TiO_2品位的影响进行研究。将细磨钛渣与7.5%磷酸在1000℃下焙烧2h,再将焙烧产物经过两段硫酸沸腾浸出,可获得TiO_2品位为88.54%,CaO与MgO总量为0.42%的富钛料。经XRD鉴定,该富钛料主要物相为金红石结构的TiO_2。机理研究表明,钛渣添加磷酸后焙烧,黑钛石固溶体结构和硅酸盐矿物结构遭到破坏,从而使钛渣中的钛组分转变为金红石物相,杂质组分转变为可酸溶的磷酸盐和石英。

关 键 词：titanium slag activation roasting acid leaching Ti-rich material futile 

分 类 号：TF823[冶金工程—有色金属冶金]