Autoclave Leaching of Arsenic from Copper Concentrate and Matte

Neustroev, V. I.; Karimov, К. A.; Набойченко, С. С.; Kovyazin, A. A.

doi:10.1007/s11015-015-0080-y

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…In autoclave leaching copper and zinc are extracted into the solution, precipitating arsenic in the form of an insoluble compound -iron arsenate [20][21][22], according to the reactions:…”

Section: Resultsmentioning

confidence: 99%

Copper Smelting Fine Dust Autoclave Leaching

Kovyazin

Тимофеев

Krauhin³

2019

MSF

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At present, arsenic content in copper concentrates is increasing, which leads to an increase in its content in all smelting products, the largest amount of arsenic is transferred in fine dust (dust composition,%: 10-12 Zn, 11-13 Pb, 8-15 Cu , 12-14 Fe, 5-10 As). Autoclaved leaching of dusts (temperature 160-200 °C, oxygen pressure 0.4-0.8 MPa, molar ratio H2SO4 /(Cu + Zn) = 0.75-2.25) to obtain a copper-zinc solution and a cake containing arsenic, iron and lead was studied. Copper extraction in the solution reaches 92%, zinc 95%. Lead, arsenic and iron are concentrated in the cake. Lead from cake is extracted by leaching in sodium chloride solution (temperature 60-70 ° C, NaCl concentration 300 g / dm3). The extraction of lead into the solution is 95%, subsequently lead is precipitated as lead carbonate.

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“…In autoclave leaching copper and zinc are extracted into the solution, precipitating arsenic in the form of an insoluble compound -iron arsenate [20][21][22], according to the reactions:…”

Section: Resultsmentioning

confidence: 99%

Copper Smelting Fine Dust Autoclave Leaching

Kovyazin

Тимофеев

Krauhin³

2019

MSF

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“…(1) A good adaptability of raw materials and a high comprehensive utilization of resources. In the leaching kinetic conditions of high temperature and pressure, the pressure hydrometallurgy process has a fast leaching rate and is able to treat a variety of metal sulfide and oxide ores (see Figure 1) as well as complex low-grade materials, including low-grade minerals [2], arsenic-containing materials [3], multimetal-accompanying minerals, intermediate metallurgical materials, and secondary renewable resources. While extracting the main metal, it can also selectively leach and separate the accompanying rare metals or precious metals [4].…”

Section: Introductionmentioning

confidence: 99%

An Overview of Flashing Phenomena in Pressure Hydrometallurgy

Liu

Zhou

et al. 2023

Processes

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Pressure hydrometallurgy has attracted much attention for its characteristics, such as the high adaptability of raw materials and environmental friendliness. Flashing (flash boiling or flash evaporation) refers to the phase change phenomenon from liquid to gas triggered by depressurization, which is an important connection between high-pressure processes and atmospheric ones in pressure hydrometallurgy. This paper takes the flashing process in zinc leaching and alumina Bayer processes as examples, describes the flashing process in pressure hydrometallurgy in detail for the first time, and shows the importance of the flashing process in energy recovery, solution concentration, and liquid balance, as well as increasing equipment life. According to solid holdup (the volume percentage of solid), this paper proposes to divide the flashing process into solution flashing (low solid holdup) and slurry flashing (high solid holdup). A further focus is put on reviewing the state of the art of related studies. The results reveal that the research on the flashing process in pressure hydrometallurgy is scarce and often oversimplified, e.g., ignoring the BPE (boiling point elevation) and NEA (non-equilibrium allowance) in solution flashing and the effect of solid particles in slurry flashing. Computational fluid dynamic (CFD) simulation is a promising tool for investigating the flashing process. Based on the progress made in other fields, e.g., seawater desalination, nuclear safety analysis, and engine fuel atomization, we suggest that solution flashing can be studied using the CFD–PBM (population balance model) coupled two-fluid model, since a wide size range of bubbles will be generated. For slurry flashing, the effect of solid holdup on the bubble nucleation rate and mechanism as well as other bubble dynamics processes should be accounted for additionally, for which a quantitative description is still lacking. Meanwhile, data for validating the numerical method are scarce because of the harsh experimental conditions, and further research is needed. In summary, this work presents an overview of the flashing processes in pressure hydrometallurgy and some guidelines for future numerical studies.

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“…Impurities of lead, zinc, arsenic, and antimony sulfides significantly complicate the production of high-grade copper. In this regard, various methods were and still are being developed to remove the mentioned compounds from the matte melt [2][3][4][5][6][7][8][9][10][11][12]. One of them is a distillation of volatile compounds in a vacuum at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Distribution of Rare Elements in Distillation Processing of Polymetallic Matte

Volodin,

Nitsenko,

Linnik

et al. 2023

Metals

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The results of studies on the distribution of rare elements among the products of distillation processing of polymetallic mattes are present in this article. Schemes of the developed technological equipment for the implementation of the extraction processes of rare elements via the vacuum distillation of mattes are presented. Technological tests were performed with a matte of lead, copper, and antimony plants at 1100–1250 °C and a pressure of up to 700 Pa. It was established that As, Cd, Bi, In, and Ge, by more than 90% in total, are extracted into condensate and dust in the distillation process of volatile components from mattes of lead production. At the same time, antimony is distributed between the distillate residue and condensate. Antimony by 90.47%, arsenic by 78.83% and cadmium by 98.72% are distributed into sulfide condensate and dust in the distillation of copper production matte. From the matte of the antimony plant, Sb and Bi (90.76% and 89.78%, respectively) are transferred into the condensate and cyclone dust. Arsenic is distributed between the liquid and vapor phases. Based on calculations, Se and Te will be mainly concentrated in the distillation residue. High-grade copper mattes obtained in processing mattes from lead and copper plants can be further used to obtain metallic copper by converting. The condensate and dust can be processed separately or with the dust of the mainline production for rare metal extraction. Antimony matte processing condensate containing more than 70% Sb can be directed to the process of crude antimony refining.

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Autoclave Leaching of Arsenic from Copper Concentrate and Matte

Cited by 5 publications

References 1 publication

Copper Smelting Fine Dust Autoclave Leaching

Copper Smelting Fine Dust Autoclave Leaching

An Overview of Flashing Phenomena in Pressure Hydrometallurgy

Distribution of Rare Elements in Distillation Processing of Polymetallic Matte

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