Ammonia autoclave technology for the processing of low-grade concentrates generated in flotation concentration of cupriferous sandstones

Boduen, A. Ya.; Фокина, С. Б.; Петров, Г. В.; Andreev, Yu. V.

doi:10.17580/or.2019.02.06

Cited by 4 publications

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“…Such laboratory tests consume much labor and need special and expensive equipment. Despite the labor intensity, these tests yet remain irreplaceable in modeling, design and upgrade of concentration factories for ferrous metal ore [20,21], nonferrous metals [22][23][24][25][26][27], noble metals [28,29] and nonmetallic minerals [30,31].…”

Section: Introductionmentioning

confidence: 99%

Ore hardness properties evaluation based on industrial comminution circuits surveys

Lvov¹,

Chitalov²,

Lagov³

2022

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The paper addresses determination of ore hardness and grindability parameters using the data obtained from the industrial comminutions circuits survey campaigns. The calculations use the earlier obtained relations between the high-energy impact fracture parameters A and b from JK DWT and SMC tests and the energy efficiency indices used in the Morrell method for the conventional grinding, coarse grinding and high pressure grinding roll milling. Using the simulation modeling of comminution circuits for two types of sulfide copper-nickel ore and one type of apatite-nepheline ore, it is shown that the relative error of the theoretical determination of the JK DWT and SMC testing data is never higher than 16.1%. The calculation method is recommended for application in design and optimization studies of process plants for various genesis minerals, including iron ore.

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Section: Introductionmentioning

confidence: 99%

Ore hardness properties evaluation based on industrial comminution circuits surveys

Lvov¹,

Chitalov²,

Lagov³

2022

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“…Few studies, however, have focused on the kinetics of simultaneous copper and silver recovery by ammonia leaching from low-grade concentrates or ores under pressure [22,24,37]. Therefore, the aim of this work is to investigate the kinetics and mechanisms of the ammonia pressure leaching of low-grade sulfide raw materials containing copper and silver, in order to study the effects of Si-containing minerals on the kinetics of Cu and Ag leaching.…”

Section: Introductionmentioning

confidence: 99%

Effect of Preliminary Alkali Desilication on Ammonia Pressure Leaching of Low-Grade Copper–Silver Concentrate

Karimov

Shoppert

Rogozhnikov

et al. 2020

Metals

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Ammonia leaching is a promising method for processing low-grade copper ores, especially those containing large amounts of oxidized copper. In this paper, we study the effect of Si-containing minerals on the kinetics of Cu and Ag leaching from low-grade copper concentrates. The results of experiments on the pressure leaching of the initial copper concentrate in an ammonium/ammonium-carbonate solution with oxygen as an oxidizing agent are in good agreement with the shrinking core model in the intra-diffusion mode: in this case, the activation energies were 53.50 kJ/mol for Cu and 90.35 kJ/mol for Ag. Energy-dispersive X-ray spectroscopy analysis (EDX) analysis showed that reagent diffusion to Cu-bearing minerals can be limited by aluminosilicate minerals of the gangue. The recovery rate for copper and silver increases significantly after a preliminary alkaline desilication of the concentrate, and the new shrinking core model is the most adequate, showing that the process is limited by diffusion through the product layer and interfacial diffusion. The activation energy of the process increases to 86.76 kJ/mol for Cu and 92.15 kJ/mol for Ag. Using the time-to-a-given-fraction method, it has been shown that a high activation energy is required in the later stages of the process, when the most resistant sulfide minerals of copper and silver apparently remain.

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“…Despite the prevalence of pyrometallurgical processes, the global copper production by implementing hydrometallurgical approach increases (Fedoseev et al, 2018;Boduen et al, 2019). Amongst current technologies, an alkaline sulphide hydrometallurgical process has been demonstrated successful results in selective dissolution of arsenic and antimony from a copper concentrate containing enargite and tennantite (Prada et al, 2014;Tongamp et al, 2009;Baláž et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Advances in Raw Material Industries for Sustainable Development Goals

Litvinenko¹

2020

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Ammonia autoclave technology for the processing of low-grade concentrates generated in flotation concentration of cupriferous sandstones

Cited by 4 publications

References 0 publications

Ore hardness properties evaluation based on industrial comminution circuits surveys

Ore hardness properties evaluation based on industrial comminution circuits surveys

Effect of Preliminary Alkali Desilication on Ammonia Pressure Leaching of Low-Grade Copper–Silver Concentrate

Advances in Raw Material Industries for Sustainable Development Goals

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