Efficient enrichment of low-grade refractory rhodochrosite by preconcentration-neutral suspension roasting-magnetic separation process

2020 ◽  
Vol 361 ◽  
pp. 529-539 ◽  
Author(s):  
Shuai Yuan ◽  
Wentao Zhou ◽  
Yuexin Han ◽  
Yanjun Li
Keyword(s):  
Magnetic Separation ◽  
Separation Process ◽  
Low Grade

The Study on Microwave Magnetic Roasting Plus Magnetic Seperation and Acid Pickling to Enrich Nb of Low-Grade Niobium Minerals

2012 ◽  
Vol 182-183 ◽  
pp. 17-22 ◽  
Author(s):  
Jie Li ◽  
Jun Wang ◽  
Bao Wei Li ◽  
Lei Wang
Keyword(s):  
Particle Size ◽  
Magnetic Separation ◽  
Separation Process ◽  
Low Grade ◽  
Iron Recovery ◽  
Separation Effect ◽  
Acid Pickling ◽  
Low Intensity ◽  
Separation Result ◽  
Iron Grade

In present article, the low intensity magnetic separation process was studied for the low-grade niobium minerals by microwave magnetic roasting. The influence of magnetic density, particle size of grinding and dispersant addition on the magnetic separation effect of sinter ore with the best magnetisability was investigated emphatically. The results show that the iron recovery was decreased and the iron grade increased gradually with decreasing the magnetic density and particle size of grinding. The magnetic separation result of sinter ore was optimal under the magnetic density of 80KA / m and the grinding grain-size of 33 μm. Fine grinding can effectively make Fe separated from Nb, especially when the dispersant(industrial alcohol) was used in the process of magnetic separation , resulting in the improvement of the grade of iron from 57.2% to 60.5% and enrichment of Nb in the tailing ore(the grade of Nb was 5.01%). After the acid pickling of tailing ore containing Nb, the grade of Nb in the extract was improved to 12.36%, which was enriched four times more than that of low-grade niobium ore before microwave magnetic roasting.

Upgrading Natural Low-Grade Manganese Ore by Iron Oxide Elimination Using a Magnetic Separation Process

2017 ◽  
Vol 9 (7) ◽  
pp. 1151-1156
Author(s):  
Chan Wook Kim ◽  
Byung Su Kim ◽  
Han Gil Suk ◽  
Kee Hyeon Cho
Keyword(s):  
Iron Oxide ◽  
Magnetic Separation ◽  
Separation Process ◽  
Low Grade ◽  
Manganese Ore

Research on Separating Low-Grade K-Feldspar from Quartz without Hydrofluoric Acid

2013 ◽  
Vol 826 ◽  
pp. 97-101 ◽  
Author(s):  
Zhen Fu Lv ◽  
Hong Chao Li ◽  
Hong Xin Zhang ◽  
Min Tian
Keyword(s):  
Magnetic Separation ◽  
High Intensity ◽  
Hydrofluoric Acid ◽  
Separation Process ◽  
Closed Circuit ◽  
Low Grade ◽  
Feldspar Concentrate ◽  
Quartz Concentrate

Flotation technology without fluorite was studied to separate low-grade K-feldspar with quartz. It is shown in the results that qualified K-feldspar concentrate can be gained by grinding, desliming, flotation and high intensity Magnetic Separation process. Feldspar concentrate obtained in closed-circuit had a content of K2O and Na2O 12.12%, quartz concentrate with a yield of 19.94% containing 97.12% SiO2 was obtained in the same time.

scholarly journals Production of Ferronickel Concentrate from Low-Grade Nickel Laterite Ore by Non-Melting Reduction Magnetic Separation Process

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1340
Author(s):  
Guorui Qu ◽  
Shiwei Zhou ◽  
Huiyao Wang ◽  
Bo Li ◽  
Yonggang Wei
Keyword(s):  
Magnetic Separation ◽  
Separation Process ◽  
Phase Changes ◽  
Low Grade ◽  
Nickel Laterite ◽  
Nickel Laterite Ore ◽  
Roasting Temperature ◽  
Grinding Time ◽  
Optimal Reduction ◽  
Laterite Ore

The production of ferronickel concentrate from low-grade nickel laterite ore containing 1.31% nickel (Ni) was studied by the non-melting reduction magnetic separation process. The sodium chloride was used as additive and coal as a reductant. The effects of roasting temperature, roasting duration, reductant dosage, additive dosage, and grinding time on the grade and recovery were investigated. The optimal reduction conditions are a roasting temperature of 1250 °C, roasting duration of 80 min, reductant dosage of 10%, additive dosage of 5%, and a grinding time of 12 min. The grades of nickel and iron are improved from 2.13% and 51.12% to 8.15% and 64.28%, and the recovery of nickel is improved from 75.40% to 97.76%. The research results show that the additive in favor of the phase changes from lizardite phase to forsterite phase. The additive promotes agglomeration and separation of nickel and iron.

The Development of Preconcentration Technology in Low-Grade Magnetite’s Beneficiation

2011 ◽  
Vol 361-363 ◽  
pp. 324-327
Author(s):  
Chun Hong Xu
Keyword(s):  
Magnetic Separation ◽  
Steel Industry ◽  
Iron Ore ◽  
Separation Process ◽  
Low Grade ◽  
High Grade ◽  
Separation Technology ◽  
Great Progress ◽  
Dry Magnetic Separation ◽  
Production Practices

Exhaustion of high-grade magnetite resources and large demand for iron ore in the rapidly developing steel industry promotes the mining enterprises to exploit low-grade magnetite. Low-grade magnetite with a low content of valuable minerals is hard to be separated with the conventional separation process flow because of its high beneficiation costs. By preconcentration technology, enriching valuable minerals and discarding large amounts of gangue as soon as possible before grinding, low beneficiation costs can be achieved in low-grade magnetite’s beneficiation. After continuous researches and production practices and the development of relevant efficient crushing and separating equipments, preconcentration technology has made great progress: from crushing-dry magnetic separation technology to grinding-wet magnetic separation technology, then to ultrafine crushing-wet magnetic separation technology. Now preconcentration has become an indispensable stage in low-grade magnetite’s beneficiation.

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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