scholarly journals Recovery of iron from copper tailings via low-temperature direct reduction and magnetic separation: process optimization and mineralogical study

2017 ◽  
Vol 24 (9) ◽  
pp. 974-982 ◽  
Author(s):  
Rui-min Jiao ◽  
Peng Xing ◽  
Cheng-yan Wang ◽  
Bao-zhong Ma ◽  
Yong-Qiang Chen
Keyword(s):  
Low Temperature ◽  
Magnetic Separation ◽  
Process Optimization ◽  
Direct Reduction ◽  
Separation Process ◽  
Copper Tailings ◽  
Mineralogical Study

scholarly journals Iron Recovery from Discarded Copper Slag in a RHF Direct Reduction and Subsequent Grinding/Magnetic Separation Process

Minerals ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 119 ◽  
Author(s):  
Zhicheng Cao ◽  
Tichang Sun ◽  
Xun Xue ◽  
Zhanhua Liu
Keyword(s):  
Magnetic Separation ◽  
Direct Reduction ◽  
Copper Slag ◽  
Separation Process ◽  
Iron Recovery

Recovery of iron and copper from copper tailings by coal-based direct reduction and magnetic separation

2017 ◽  
Vol 24 (10) ◽  
pp. 991-997 ◽  
Author(s):  
Chao Geng ◽  
Hua-jun Wang ◽  
Wen-tao Hu ◽  
Li Li ◽  
Cheng-shuai Shi
Keyword(s):  
Magnetic Separation ◽  
Direct Reduction ◽  
Copper Tailings

Study on the Magnetic Separation Experiment of Vanadium and Titanium Iron Concentrate Pellets

2012 ◽  
Vol 549 ◽  
pp. 969-974
Author(s):  
Lan Ma ◽  
Shao Li Yang ◽  
Ya Ling Li
Keyword(s):  
Magnetic Separation ◽  
Process Parameters ◽  
Direct Reduction ◽  
Reduction Process ◽  
Separation Process ◽  
Raw Material ◽  
Iron Concentrate ◽  
Metallized Pellets ◽  
The Impact ◽  
Alloy Iron

Based on Vanadium and Titanium iron concentrate pellets as raw material produced by direct reduction process of coal rotary hearth furnace in an enterprise, the paper studies the impact of magnetic separation process parameters on magnetic separation effect. The results shows that: the use of magnetic separation process can successfully separate metallized pellets, and obtain vanadium titanium micro-alloy iron powder and ti-enriched slag; suitable magnetic separation process parameters are: excitation current of 4A (magnetic field strength 2250Oe), particle size -200 mesh (-74μm), mine concentration of 1:3, iron recovery 92.5% TiO2 recovery up to 55.5%.

scholarly journals Removal of Impurities from Shungite Via a Combination of Physical and Chemical Treatments

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 245
Author(s):  
Toyohisa Fujita ◽  
Taichi Aoki ◽  
Josiane Ponou ◽  
Gjergj Dodbiba ◽  
Chunlin He ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Sulfur Removal ◽  
Nitrilotriacetic Acid ◽  
Microwave Treatment ◽  
Magnetic Flux Density ◽  
High Gradient Magnetic Separation ◽  
Chemical Leaching ◽  
Inorganic Acids ◽  
Mineralogical Study ◽  
Physical And Chemical

This study investigated the removal of sulfur and iron from shungite rocks through different methods after fine grinding: flotation, magnetic separation, microwave treatment, and chemical leaching. In this work, first, a mineralogical study of shungite was conducted. The carbon, silica, iron, and sulfur compositions in the as-received shungite were 45.4%, 38.3%, 4.6%, and 2.4%, respectively. In flotation, a sulfur grade of 1.4% was obtained. In the wet high-gradient magnetic separation at a magnetic flux density of 1 tesla, the iron and sulfur grades in the nonmagnetic fraction were 2.8% and 1.9%, respectively. Furthermore, the sulfur reduced to 0.2% by the 9 min microwave irradiation. In addition, chemical leaching using chelating reagents and inorganic acids was utilized to remove iron and sulfur. Nitrilotriacetic acid (NTA) could reduce the iron and sulfur grades to 2.0% and 0.9%, respectively. For leaching using reverse aqua regia, the iron and sulfur grades were reduced to 0.9% and 0.23%, respectively. For leaching using a 6N HCl with H2O2 aqueous solution, the iron and sulfur grades were reduced to 0.8% and 0.34%, respectively. Overall, chemical leaching using HCl with H2O2 was the most effective for iron and sulfur removal from shungite.

scholarly journals Recovery of γ-Fe2O3 from copper ore tailings by magnetization roasting and magnetic separation

2021 ◽  
Vol 19 (1) ◽  
pp. 128-137
Author(s):  
Bing Luo ◽  
Tongjiang Peng ◽  
Hongjuan Sun
Keyword(s):  
Magnetic Separation ◽  
Magnetic Field Intensity ◽  
Sodium Dodecyl ◽  
Separation Process ◽  
Sodium Dodecyl Sulfonate ◽  
Copper Ore ◽  
Yield Rate ◽  
Optimum Parameters ◽  
Roasting Temperature ◽  
Mineralogical Phase

Abstract To comprehensively reuse copper ore tailings, the recovery of γ-Fe2O3 from magnetic roasted slag after sulfur release from copper ore tailings followed by magnetic separation is performed. In this work, after analysis of chemical composition and mineralogical phase composition, the effects of parameters in both magnetization roasting and magnetic separation process with respect to roasting temperature, residence time, airflow, particle size distribution, magnetic field intensity, and the ratio of sodium dodecyl sulfonate to roasted slag were investigated. Under optimum parameters, a great number of γ-Fe2O3 is recycled with a grade of 66.86% and a yield rate of 67.21%. Meanwhile, the microstructure, phase transformation and magnetic property of copper ore tailings, roasted slag, and magnetic concentrate are carried out.

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