Synchronous extractions of nickel, copper, and cobalt by selective chlorinating roasting and water leaching to low-grade nickel-copper matte

Cui, Fuhui; Mu, Wenning; Wang, Shuai; Xin, Haixia; Shen, Hongtao; Xu, Qian; Zhai, Yuchun; Luo, Shaohua

doi:10.1016/j.seppur.2017.11.071

Cited by 59 publications

(22 citation statements)

References 38 publications

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“…Processes 2020, 8,200 10 of 18 the increase of roasting temperature, the grade of cobalt increased, and the recovery of cobalt increased first and then decreased. When the temperature increased to 950 °C, the grade of cobalt increased to 7.63%, and the recovery rate of cobalt was 85.47%; when the temperature increased to 1000 °C, the grade of cobalt increased to 8.23%, but the recovery rate of cobalt decreased to 71.81%.…”

Section: Effect Of Roasting Timementioning

confidence: 99%

“…Processes 2020, 8,200 11 of 18 decomposition, chlorination, reduction, and other reactions are not only sequential chemical reactions, they are also complex phase changes. The segregation roasting time mainly affects the degree of chemical reaction in the process of segregation roasting.…”

Section: Effect Of Coke Dosagementioning

confidence: 99%

“…Processes 2020, 8,200 13 of 18 In the process of magnetic separation, the effect of external forces becomes more obvious. To improve the magnetic separation index, the field intensity of magnetic separation needs to be changed.…”

Section: Iron Extraction From Cobalt Magnetic Separation Tailings By mentioning

confidence: 99%

“…For example, the main disadvantage of direct sulfuric acid roasting in the Shandong Zibo cobalt plant is that the treatment capacity is low (3.0 t/m 2 ·d), and the SO 2 content in the flue gas is only 4-5%, which is not conducive to acid production. Aiming at the roasting leaching of cobalt sulfur concentrate with high cobalt content, low sulfur content, and a considerable amount of copper, the effects of roasting temperature, roasting Processes 2020, 8,200 3 of 18 time, additive dosage, leaching time, leaching temperature, and liquid-solid ratio were analyzed to investigate the influence of the leaching rates of copper and cobalt. After the cobalt-sulfur concentrate was mixed evenly, the temperature was raised to 620 • C at 2.7 • C/min, calcined for 3 h, and the calcine was leached at 80 • C with 33% slurry concentration of 30 g/L sulfuric acid for 2 h, the results showed leaching rates of Co and Cu of 91% and 90% respectively.…”

Section: Introductionmentioning

confidence: 99%

“…After the cobalt-sulfur concentrate was mixed evenly, the temperature was raised to 620 • C at 2.7 • C/min, calcined for 3 h, and the calcine was leached at 80 • C with 33% slurry concentration of 30 g/L sulfuric acid for 2 h, the results showed leaching rates of Co and Cu of 91% and 90% respectively. The cobalt sulfur concentrate was oxidized roasted at 850-900 • C, and the cinder was mixed with some cobalt sulfur concentrate and chlorinating agent to carry out medium-temperature chlorination sulfuric acid roasting at about 650 • C. This way had a high bed capacity (17-18 t/m 2 ·d), but the SO 2 concentration in the flue gas was only 1-2%, which is difficult for acid production, and there was a certain amount of hydrogen chloride gas in the flue gas, which will lead to serious corrosion of the equipment [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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

Xiao

Zhang

2020

Processes

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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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Section: Effect Of Roasting Timementioning

confidence: 99%

Section: Effect Of Coke Dosagementioning

confidence: 99%

Section: Iron Extraction From Cobalt Magnetic Separation Tailings By mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%