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1. 发明申请

WO2004113230A1 EXTRACTION PROCESS FOR REACTIVE METAL OXIDES 审中-公开
标题翻译：反应性金属氧化物的萃取方法
公开(公告)号：WO2004113230A1
公开(公告)日：2004-12-29
申请号：PCT/GB2004/002543
申请日：2004-06-11
申请人： THE UNIVERSITY OF LEEDS , JHA, Animesh , MALPAN, Pailo, Antony , TATHAVADKAR, Vilas, Dattatray
发明人： JHA, Animesh , MALPAN, Pailo, Antony , TATHAVADKAR, Vilas, Dattatray
IPC分类号： C01G23/047
CPC分类号： C22B34/1236 , C01F7/142 , C01F7/38 , C01G23/047 , C01G49/06 , C22B1/02 , C22B5/10 , C22B7/04 , C22B21/0038 , C22B34/1209 , C22B34/1259 , Y02P10/214 , Y02P10/218 , Y02P10/224 , Y02P10/23
摘要： The present invention relates to a zero-waste process for extraction of alumina from différent types of bauxite ores and red mud residues and of titanium dioxide from ilmenite. Iron oxide is first reduced to metallic iron above the melting point of C-saturated cast iron alloy which yields a high-C iron alloy and an AI and Ti metal oxide rich slag which is then treated with alkali carbonate to form alkali aluminates and titanates. The alkali aluminates are separated by water leaching from which the hydroxide of alumina is precipitated by bubbling C0 2 . The residue from water leaching is treated with sulphuric acid and Ti0 2 is precipitated via a hydrolysis route. The process recovers most of the metal values and generates only small quantities of silicious residues at pH 4-5 which can be used for soil conditioning. The present also relates to a method for selective separation of Ti0 2 -rich oxides from titaniferrous ore/residue materials via oxidative roasting in the presence of alkali carbonate or carbonates followed by aqueous leaching of the roasted material and selective precipitation of Ti0 2 under controlled condition below pH=4.
摘要翻译：本发明涉及从不同类型的铝土矿和红泥渣以及来自钛铁矿的二氧化钛提取氧化铝的零废弃方法。首先将氧化铁还原成高于C饱和铸铁合金的熔点的金属铁，其产生高C铁合金和富含Al和Ti的富含金属氧化物的炉渣，然后用碱金属碳酸盐处理以形成碱金属铝酸盐和钛酸盐。碱金属铝酸盐通过水浸出分离，氧化铝的氢氧化物通过鼓泡形成CO 2沉淀。用硫酸处理来自水浸的残渣，经水解路线沉淀出TiO 2。该过程恢复大部分金属值，并在pH 4-5下仅产生少量的可用于土壤调理的硅残余物。本发明还涉及一种通过在碱金属碳酸盐或碳酸盐存在下通过氧化焙烧从钛铁矿/残渣物质中选择性分离富含TiO 2的氧化物的方法，然后将焙烧物料进行含水浸出并在低于pH的控制条件下选择性沉淀TiO 2 = 4。

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