scholarly journals Transformation Behaviour of Sulfur from Gypsum Waste (CaSO4·2H2O) while Roasting with Tin-bearing Iron Concentrate for Tin Removal and Iron Recovery

2020 ◽  
Vol 60 (10) ◽  
pp. 2291-2300
Author(s):  
Yong Yu ◽  
Lei Li
Keyword(s):  
Iron Recovery ◽  
Transformation Behaviour ◽  
Iron Concentrate ◽  
Tin Removal

Mineral Processing Technology Study on a Lean Hematite Ore with Finely-Disseminated Minerals

2013 ◽  
Vol 303-306 ◽  
pp. 2473-2476
Author(s):  
Wei Zhi Wang ◽  
Li Hui Zhou ◽  
Chun Guang Yang
Keyword(s):  
Mineral Processing ◽  
Low Grade ◽  
Iron Recovery ◽  
Technology Study ◽  
Complex Composition ◽  
Flotation Process ◽  
Iron Concentrate ◽  
Second Stage ◽  
Fine Grain ◽  
Hematite Ore

The mineral processing experimental research was carried out on the hematite bearing characteristics of low grade, fine grain,complex composition. The results showed that using the technological flowsheet of “stage grinding- low intensity magnetic separation”, the iron concentrate with recovery of 36.56% and grade of 65.85% Fe can be obtained. And the iron concentrate with recovery of 17.23% and grade of 63.53% Fe can be obtained by “stage grinding-HIMS process-reverse flotation” process. The final iron concentrate with TFe grade of 65.10%,yield of 19.19% and total iron recovery of 53.79% from the raw ores with TFe grade of 23.41％ was obtained, with the first stage grinding size being 55% -0.074mm and the second stage,93% -0.074mm.

Process Mineralogy and Concentrating of Hematite-Limonite Ore in Southern China

2011 ◽  
Vol 201-203 ◽  
pp. 2749-2752
Author(s):  
Shu Xian Liu ◽  
Li Li Shen ◽  
Jin Xia Zhang
Keyword(s):  
Southern China ◽  
Close Association ◽  
Separation Process ◽  
Reverse Flotation ◽  
Iron Recovery ◽  
Flotation Process ◽  
Iron Concentrate ◽  
Process Mineralogy ◽  
Concentrate Grade ◽  
Reverse Floatation

The grade of the crude hematite-limonite ore is 39.79%. The main metallic minerals are hematite-limonite. Hematite has disseminated structure distributed in the gangue. Limonite was inlayed as stars in hematite. Due to their fine dissemination and close association with gangue minerals, the hematite and limonite particles are hard to be fully liberated, bringing difficulty in their separation. Staged grinding-separation process consisting of high intensity magnetic separation and reverse floatation wag adopted in the beneficiation test on the regionally representative hematite—limonite ore resource. At a grind of 70.0% -200 mesh for the primary grinding and 98.7% -200 mesh for the secondary grinding, the final iron concentrate grade 58.26% and having an iron recovery of 8.33% can be achieved after reverse flotation process test on magnetic concentrate.

Stepped-Flotation of Mixed Magnetic Concentrate Carbonates-Containing in Donganshan

2012 ◽  
Vol 454 ◽  
pp. 292-298
Author(s):  
An Lin Shao
Keyword(s):  
Negative Influence ◽  
Total Iron ◽  
Closed Circuit ◽  
Reverse Flotation ◽  
Iron Recovery ◽  
High Quality ◽  
Iron Concentrate ◽  
Iron Grade ◽  
Hematite Concentrate

There are nearly 500 million tons of hematite ores carbonate-containing in Donganshang, China. However, the flotation flowsheet previously of in that area was seriously affected by the siderite. Therefore, many ores could not be processed by ordinary methods. In this study, mixed magnetic concentrate in scene was beneficiated by stepped-flotation, in which siderite was separated in first direct flotation step to eliminate its negative influence on hematite flotation, and then the high quality hematite concentrate could be obtained by second reverse flotation step. When the feed was mixed magnetic concentrate in scene with total iron grade of 42.84% and siderite content of 4.04%, an iron concentrate with iron grade of 67.84% and iron recovery of 69.47% was obtained in closed circuit of stepped-flotation.

scholarly journals Technological research on converting iron ore tailings into a marketable product

2021 ◽  
Vol 121 (5) ◽  
Author(s):  
I. Mitov ◽  
A. Stoilova ◽  
B. Yordanov ◽  
D. Krastev
Keyword(s):  
Magnetic Separation ◽  
Iron Ore ◽  
Zinc Content ◽  
Mass Yield ◽  
Iron Recovery ◽  
Flotation Process ◽  
Iron Concentrate ◽  
Iron Ore Tailings ◽  
Lead And Zinc ◽  
Magnetizing Roasting

SYNOPSIS We present three technological scenarios for the recovery of valuable components from gangue, stored in the tailings dam at Kremikovtzi metallurgical plant in Bulgaria, into marketable iron-containing pellets. In the first approach the iron concentrate was recovered through a two-stage flotation process, desliming, and magnetic separation. In the second proposed process, the iron concentrate was subjected to four sequential stages of magnetic separation coupled with selective magnetic flocculation. The third route entails the not very common practice of magnetizing roasting, followed by selective magnetic flocculation, desliming, and magnetic separation. The iron concentrate was pelletized in a laboratory-scale pelletizer. Each technology has been assessed with regard to the mass yield of iron concentrate, the iron recovery. and the iron, lead, and zinc content in order to identify the most effective route. Keywords: tailings reprocessing, magnetizing roasting, pelletization.

Experimental Research on Comprehensive Recovery of Iron and Phosphorus from the Low Grade Vanadium-Titanium Magnetite Ore

2012 ◽  
Vol 549 ◽  
pp. 478-481 ◽  
Author(s):  
Wei Zhi Wang ◽  
Li Ping Chen ◽  
Chun Guang Yang
Keyword(s):  
Experimental Research ◽  
Mineral Resources ◽  
Low Grade ◽  
Iron Recovery ◽  
Iron Concentrate ◽  
Low Intensity ◽  
Magnetite Ore ◽  
Vanadium Titanium ◽  
Comprehensive Recovery ◽  
Titanium Magnetite

An experimental research on comprehensive recovery of iron and associated apatite from a low grade vanadiferous titanomagnetite ore with high phosphorus was carried out. The results showed that using the technological flowsheet of “low -intensity magnetic separation-flotation”, not only the magnetite can be effectively separated, but the associated apatite in the mineral resources can also be satisfactorily recovered. An iron concentrate with a TFe grade of 64.81% and iron recovery of 58.04% and a high-quality phosphorus concentrate of 33.50% P2O5 with a yield of 92.18% is obtained．

Research on the Middlings from Dong Anshan Iron Ore by Roasting-Magnetic Dressing

2013 ◽  
Vol 826 ◽  
pp. 102-105
Author(s):  
Ji Wei Lu ◽  
Nai Ling Wang ◽  
Wan Zhong Yin ◽  
Rui Chao Zhao ◽  
Chuang Yuan
Keyword(s):  
Magnetic Separation ◽  
Iron Ore ◽  
Reduction Roasting ◽  
Iron Recovery ◽  
Flotation Process ◽  
Iron Concentrate ◽  
Iron Grade

For the middlings (containing siderite) separated from Dong Anshan carbonaceous iron ore which was dressed by a two-step flotation process, using roasting-magnetic and regrinding-magnetic separation, the iron concentrate with iron grade and iron recovery of 60.31%, 87.49% was obtained. Mechanism of reduction-roasting was studied by means of XRD in the end.

Beneficiation Process Optimization Study on a Low-Grade Hematite Ore

2013 ◽  
Vol 303-306 ◽  
pp. 2461-2464
Author(s):  
Wei Zhi Wang ◽  
Qing Mei Jia ◽  
Chun Guang Yang
Keyword(s):  
Process Optimization ◽  
High Intensity ◽  
Iron Ore ◽  
Low Grade ◽  
Iron Recovery ◽  
Magnetic Separator ◽  
Iron Concentrate ◽  
Second Stage ◽  
Optimization Study ◽  
Hematite Ore

A hematite has low grade, fine disseminated size andcomplex disseminated relations, which are refractory iron ore. Using SLon pulsating high gradient magnetic separator, induction intensity 8500Oe, pulsating 20mm stroke, stroke of 120 beats / min), a crude iron ore concentrates a grade of 35.93.%, the recovery rate of 82.39% is obtained through high intensity magnetic separation.( The final iron concentrate with TFe grade of 64.83%,yield of 14.55% and iron recovery of 35.74% from the raw ores with TFe grade of 26.29％ was obtained, with the first stage grinding size being 50% -0.074mm and the second stage,95% -0.074mm.

Recovery of Iron from Cyanide Residues by Carbothermic Reduction-Magnetic Separation

2014 ◽  
Vol 692 ◽  
pp. 332-336 ◽  
Author(s):  
Liang Mou Yu
Keyword(s):  
Magnetic Separation ◽  
Steel Industry ◽  
Carbothermic Reduction ◽  
Industrial Wastes ◽  
Raw Material ◽  
Iron Recovery ◽  
Cyanide Leaching ◽  
Iron Concentrate ◽  
Chinese Steel Industry ◽  
Iron Bearing

A craft of carbothermic reduction-magnetic separation process is investigated for the recovery of iron from cyanide residues, a hazardous industrial wastes when produce gold with cyanide leaching method. The cyanide residues, containing 30.12% Fe was conducted for the craft. The results demonstrated that iron concentrate with 60.25% Fe and 79.85% of iron recovery was obtained under the optimal conditions (a reduction temperature of 950°C, a reduction duration of 60 min, a pulverized coal dosage of 10% and a potassium carbonate dosage of 4%).This craft can be used to utilize cyanide residues and produce qualified concentrate as iron-bearing feed for steel industry, which will help to solve the pollution of cyanide residues and extend raw material sourcing for Chinese steel industry.

Effect of microwave pre-treatment on the magnetic properties of Ludwigite and its implications on magnetic separation

2018 ◽  
Vol 116 (1) ◽  
pp. 107 ◽  
Author(s):  
Yajing Liu ◽  
Tao Jiang ◽  
Chenhui Liu ◽  
Weijun Huang ◽  
Junpeng Wang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Internal Stress ◽  
Magnetic Separation ◽  
Microwave Radiation ◽  
Energy Demand ◽  
Active Material ◽  
Microwave Treatment ◽  
Iron Recovery ◽  
Magnetic Minerals ◽  
Iron Concentrate

To improve magnetic separation and recovery for Ludwigite, the influences of microwave radiation on the heating characteristics, microstructure, magnetic properties and the magnetic separation of Ludwigite are investigated. The magnetizations of untreated and microwave-treated samples with various microwave powers are analyzed using vibrating sample magnetometer. It is found that magnetite is an active material, while ascharite and serpentine are inactive materials. The heating rate of magnetite is faster than those of ascharite and serpentine, resulting in temperature gradient and internal stress among different components in Ludwigite. The effect of microwave power on the internal stress for mineral phases is positive. The internal stress significantly induces intergranular fractures and facilitates mineral liberation. After microwave treatment from 0 to 4 kW exposed for 40 s, serpentine is dissociated and the crystallinity of magnetite is increased, which leads to the saturation magnetization of samples increasing from 12.39 to 24.51 emu/g. Compared with untreated ore, the energy demand for microwave-treated Ludwigite is only about 0.44 kWh/kg, the grade of iron concentrate of microwave-treated Ludwigite increases from 48.56% to 58.06% and iron recovery increases from 69.44% to 96.35%, respectively. It can be concluded that microwave radiation has a positive effect on magnetic properties of Ludwigite and is conducive to magnetic separation from non-magnetic minerals with low energy consumption, thereby obtaining high iron recovery.

scholarly journals Extraction of Cobalt and Iron from Refractory Co-Bearing Sulfur Concentrate

Processes ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 200 ◽  
Author(s):  
Junhui Xiao ◽  
Yushu Zhang
Keyword(s):  
Solid Solution ◽  
Iron Content ◽  
Cobalt Content ◽  
Iron Recovery ◽  
Mineral Phase ◽  
Iron Mineral ◽  
Iron Concentrate ◽  
Cobalt Recovery ◽  
Panxi Area ◽  
Iron Grade

In this study, oxidizing roasting, segregation roasting, and magnetic separation are used to extract cobalt and iron from refractory Co-bearing sulfur concentrate. The Co-bearing sulfur concentrate containing 0.68% Co, 33.26% Fe, and 36.58% S was obtained from V-Ti magnetite in the Panxi area of China by flotation. Cobalt pyrite and linneite were the Co-bearing minerals, and the gangue minerals were mica, chlorite, feldspar, and calcite in Co-bearing sulfur concentrate. The results show that cobalt is transformed from Co-pyrite and linneite to a Co2FeO4-dominated new cobalt mineral phase, and iron is transformed from pyrite to Fe2O3 and an Fe3O4-dominated new iron mineral phase after oxidizing roasting. Cobalt changed from CoFe2O4 to a new cobalt mineral phase dominated by [Co] Fe solid solution, and iron changed from Fe2O3 to a new iron mineral phase dominated by metal Fe and Fe3O4 after segregation roasting. Cobalt concentrate with a cobalt grade of 15.15%, iron content of 71.22%, and cobalt recovery of 90.81% as well as iron concentrate with iron grade of 60.06%, cobalt content of 0.11%, and iron recovery of 76.23% are obtained. The main minerals in the cobalt concentrate are Fe, [Co]Fe, Fe3O4, and SiO2, and the main minerals in the iron concentrate are Fe3O4, FeO, Ca2Si2O4, and Ca2Al2O4.

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