A method of activation roasting followed by acid leaching using titanium slag was introduced to prepare Ti-rich material.The effects of H3PO4 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 (rutile) 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TiO2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TiO2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TiO2.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.
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机译：A method of activation roasting followed by acid leaching using titanium slag was introduced to prepare Ti-rich material.The effects of H3PO4 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 (rutile) 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TiO2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TiO2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TiO2.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.
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