Low Temperature Reduction of Hematite in Red-Mud to Magnetite

被引：12

作者：

Gostu, Sumedh ^{[1
]}

Mishra, Brajendra ^{[1
]}

Martins, Gerard P. ^{[2
]}

机构：

[1] Worcester Polytech Inst, Dept Mat Sci & Engn, Worcester, MA 01609 USA

[2] Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 USA

来源：

LIGHT METALS 2017 | 2017年

基金：

美国国家科学基金会;

关键词：

Red-mud; Reduction; Magnetite; Bauxite residue; IRON; SEPARATION;

D O I：

10.1007/978-3-319-51541-0_10

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Red-mud, the residue generated from the Bayers processing of bauxite ore in Jamaica was subjected to a low temperature reduction process. Hematite (similar to 60 m%) was reduced to magnetite employing a gas based mixture of CO, CO2 and N-2 as a diluent. Extensive thermodynamic study was conducted to identify the stability region for magnetite. 'Optimal conditions' for the gas-phase reduction were determined to be: a processing temperature of 540 degrees C +/- 10 degrees C, partial pressures CO(g) and CO2(g) each of 0.070 atm (bar) +/- 0.001 atm (bar)/inert diluent-gas: N-2(g), for a conversion-time of 30 min. Mathematical model for reduction based on unidirectional diffusion is also formulated in this paper.

引用

页码：67 / 73

页数：7

共 14 条

[1]

Caupain R, 2004, THESIS

[2]

European aluminium association, 2013, BAUX RES MAN BEST PR

[3] Magnetic separation of Red Sand to produce value [J].

Jamieson, E. ;

Jones, A. ;

Cooling, D. ;

Stockton, N. .

MINERALS ENGINEERING, 2006, 19 (15) :1603-1605

[4] Production of pig iron from red mud waste fines using thermal plasma technology [J].

Jayasankar, K. ;

Ray, P. K. ;

Chaubey, A. K. ;

Padhi, A. ;

Satapathy, B. K. ;

Mukherjee, P. S. .

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS, 2012, 19 (08) :679-684

[5]

Kumar R., 1998, ENV WASTE MANAGEMENT, P108

[6] Stepwise extraction of valuable components from red mud based on reductive roasting with sodium salts [J].

Li, Guanghui ;

Liu, Mingxia ;

Rao, Mingjun ;

Jiang, Tao ;

Zhuang, Jinqiang ;

Zhang, Yuanbo .

JOURNAL OF HAZARDOUS MATERIALS, 2014, 280 :774-780

[7] Feasibility study of iron mineral separation from red mud by high gradient superconducting magnetic separation [J].

Li, Yiran ;

Wang, Jun ;

Wang, Xiaojun ;

Wang, Baoqiang ;

Luan, Zhaokun .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2011, 471 (3-4) :91-96

[8] Application of Bayer red mud for iron recovery and building material production from alumosilicate residues [J].

Liu, Wanchao ;

Yang, Jiakuan ;

Xiao, Bo .

JOURNAL OF HAZARDOUS MATERIALS, 2009, 161 (01) :474-478

[9] Recycling of iron from red mud by magnetic separation after co-roasting with pyrite [J].

Liu, Yanyan ;

Zhao, Bochao ;

Tang, Yang ;

Wan, Pingyu ;

Chen, Yongmei ;

Lv, Zijian .

THERMOCHIMICA ACTA, 2014, 588 :11-15

[10]

Martins G.P., 2015, COMMUNICATION

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