公开(公告)号：US08834600B2

公开(公告)日：2014-09-16

申请号：US10560515

申请日：2004-06-11

Applicant: Animesh Jha ,  Pailo Antony Malpan ,  Vilas Dattatray Tathavadkar

Inventor： Animesh Jha ,  Pailo Antony Malpan ,  Vilas Dattatray Tathavadkar

IPC: C22B9/00 ,  B22D11/10 ,  C21B7/14 ,  C21B15/00 ,  C21B3/04 ,  C22B5/20 ,  C22B11/10 ,  C21B11/10 ,  C01G49/02 ,  C01F7/02 ,  C01G15/00 ,  C01F3/00 ,  C01G23/047 ,  C01G27/02 ,  C01G25/02 ,  C01B13/14 ,  C01B33/12 ,  C01B33/20 ,  C01B15/14 ,  C01B33/00 ,  C22B21/00 ,  C22B34/12 ,  C01G49/06 ,  C22B7/04 ,  C22B1/02 ,  C01F7/38 ,  C01F7/14 ,  C22B5/10

CPC classification number: 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

Abstract: The present invention relates to a zero-waste process for extraction of alumina from different 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 Al 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 C02. The residue from water leaching is treated with sulphuric acid and Ti02 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 Ti02-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 Ti02 under controlled condition below pH=4.

Abstract translation: 本发明涉及从不同类型的铝土矿和赤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化而沉淀。 来自水浸的残渣用硫酸处理，TiO 2通过水解路线沉淀。 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Ti02氧化物的方法，接着浸出焙烧物料并在低于pH的控制条件下选择性沉淀TiO 2 = 4。

公开(公告)号：US07771679B2

公开(公告)日：2010-08-10

申请号：US10571038

申请日：2004-09-14

Applicant: Animesh Jha ,  Vilas Dattatray Tathavadkar

Inventor： Animesh Jha ,  Vilas Dattatray Tathavadkar

IPC: C01G23/00

CPC classification number: C01G23/0475 ,  C01G23/047 ,  C01P2002/85 ,  C01P2006/60 ,  C22B1/02 ,  C22B34/1209 ,  C22B34/1213 ,  C22B34/1222 ,  Y02P10/23

Abstract: The present invention seeks to improve beneficiation of a titanium oxide-containing composition (such as a low-grade or highly radioactive TiO2 ore) by combining a roasting and selective leaching steps.

Abstract translation: 本发明旨在通过组合焙烧和选择性浸出步骤来改善含氧化钛的组合物（例如低品位或高放射性TiO 2矿石）的选矿。

公开(公告)号：US20090311154A1

公开(公告)日：2009-12-17

申请号：US10560515

申请日：2004-06-11

Applicant: Animesh Jha ,  Pailo Antony Malpan ,  Vilas Dattatray Tathavadkar

Inventor： Animesh Jha ,  Pailo Antony Malpan ,  Vilas Dattatray Tathavadkar

IPC: C01G23/047 ,  C01F7/02 ,  C01G49/06 ,  C01B33/12

CPC classification number: 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

Abstract: The present invention relates to a zero-waste process for extraction of alumina from different 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 Al 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 CO2. The residue from water leaching is treated with sulphuric acid and TiO2 is precipitated via a hydrolysis route. The process recovers most of the metal values and generates only small quantities of silicious residues at pH4-5 which can be used for soil conditioning. The present also relates to a method for selective separation of TiO2-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 TiO2 under controlled condition below pH=4.

Abstract translation: 本发明涉及从不同类型的铝土矿和赤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二氧化碳沉淀。 来自水浸的残渣用硫酸处理，并通过水解途径沉淀出TiO 2。 该过程回收大部分金属值，并在pH4-5下仅产生少量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二氧化钛的氧化物的方法，接着浸出焙烧物料并在低于pH的控制条件下选择性沉淀TiO 2 = 4。