Bismuth Ore Leaching

Dissolution Behaviors of Minerals in Tellurium–Bismuth

2021-11-9  The dissolution behaviors of various minerals in the tellurium–bismuth ore during oxidic–acidic leaching were investigated systematically in this work. The Te–Bi phase in the ore distributes in network shape, triangular shape, tree shape, strip shape, bulk shape, sparse granule, flake shape, crescent, etc., which are closely intercalated with FeS, FeS2, and CaCO3(Mg,Fe,Mn)CO3.

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Leaching of Tellurium and Bismuth from the Dashuigou ...

2019-2-16  Abstract. In order to recover the tellurium and bismuth resources within the Dashuigou tellurium deposit in Sichuan province, China, the leaching of these metals from the raw ore in H 2 SO 4 and FeCl 3 media was investigated in this work. The effect of H 2 SO 4 concentration, Fe 3+ concentration, liquid/solid ratio, leaching time and leaching temperature was studied.

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A novel and clean process for extracting tellurium and ...

2020-1-1  The leaching ratios of tellurium and bismuth at 20 min increase from 72.30% and 72.55% to 93.39% and 94.34%, respectively with the increase of leaching temperature from 25 °C to 90 °C. Further increase in leaching time gives no further obvious benefit for the leaching of tellurium and bismuth.

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Direct oxidative pressure leaching of bismuth sulfide ...

2020-6-1  It can be known from Fig. 7 and Table 2 that majority of bismuth was dissolved into leaching solution during the pressure leaching process in MSA medium, and bismuth concentration in leaching solution could reach 22.93 g/L with the average bismuth content in leaching residue reduced to 2.78%. Meanwhile, chalcopyrite, galena, and pyrite were ...

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(PDF) Processes for the recovery of bismuth from ores and ...

copper–bismuth ore (Cu, 2.35%; Bi, 0.26%) and ... 0.98% of bismuth, the leaching of a copper–bismuth. concentrate with 4% hydrochloric acid, and the. coprecipitation of

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Method for the treatment of bismuth-containing sulphide ...

The method is characterized by leaching the ore or the concentrate with sulfuric acid over a predetermined time period while supplying heat at a pH below 2, and thereafter separating from the leachate a leaching residue in the form of a product which is leaner in bismuth and more enriched with regard to its valuable metal content than the input ...

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Bismuth - USGS

2021-2-4  World reserves of bismuth are usually estimated based on the bismuth content of lead resources because bismuth production is most often a byproduct of processing lead ores. In China and Vietnam, bismuth production is a byproduct or coproduct of tungsten and other metal ore processing. Bismuth minerals rarely occur in

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PRESSURE LEACHING - RPMGlobal

2020-1-22  2) The increase in penalty elements in some ore bodies – the principal penalty element being found today is arsenic which is fixed through pressure oxidation, but other elements are sometimes found, depending on the ore body, including bismuth, etc. There are two principal copper concentrate pressure leaching

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Gold Metallurgy and Leaching Process

2015-6-24  Leaching, often gold, is the process of extracting a soluble constituent from a solid by means of a solvent. In extractive metallurgy, of gold, it is the process of dissolving a certain mineral (or minerals) from an ore or a concentrate, or dissolving certain constituents from materials such as a calcines, mattes, scrap alloys, anodic slimes, etc., to achieve either one or two purposes:

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Leaching of Tellurium and Bismuth from the Dashuigou ...

2019-2-16  Abstract. In order to recover the tellurium and bismuth resources within the Dashuigou tellurium deposit in Sichuan province, China, the leaching of these metals from the raw ore in H 2 SO 4 and FeCl 3 media was investigated in this work. The effect of H 2 SO 4 concentration, Fe 3+ concentration, liquid/solid ratio, leaching time and leaching temperature was studied.

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A method of processing bismuth concentrates

There is a method of extraction of bismuth sulfide ore comprising leaching the acidified restification process. There is also known a method of extraction of bismuth from sulphide ores, concentrates and dump intermediates, including leaching with dilute hydrochloric acid solutions in the presence of ferric chloride in which to increase the rate ...

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Bismuth - USGS

2021-2-4  World reserves of bismuth are usually estimated based on the bismuth content of lead resources because bismuth production is most often a byproduct of processing lead ores. In China and Vietnam, bismuth production is a byproduct or coproduct of tungsten and other metal ore processing. Bismuth minerals rarely occur in

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A novel and clean process for extracting tellurium and ...

2020-1-1  After leaching, tellurium and bismuth exist in the lixivium in the form of Te4+ or HTeO2+ and Bi3+, respectively. The effects of particle size, H2SO4 concentration, Fe3+ concentration, reaction temperature, reaction time and liquid-solid ratio on the leaching rate of tellurium and bismuth are discussed in detail.

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Study on Intensification Behavior of Bismuth Ions on Gold ...

Gold cyanide leaching is inefficient with conventional cyanidation. Bismuth ions can improve the efficiency of gold cyanidation by intensifying gold dissolution. The electrochemical behavior, structure information, and surface product of gold anodic dissolution were studied during the intensification of bismuth ions on gold cyanide leaching. The electrochemical analysis showed that the bismuth ...

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Using Taguchi Method to Optimize Recovery of Bismuth

The recovered bismuth was calculated by mass balance using the analysis of the concentrate and the leach residue. The leaching solution was recycled to leach fresh concentrate until the bismuth concentration in solution was enriched to more than 70 g/L (by reaction 1). Bi2S3+NaClO3+6HCl→2BiCl3+NaCl+3H2O+3S (1)

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Bioleaching - BioMineWiki

2009-8-31  Bioleaching is leaching where the extraction of metal from solid minerals into a solution is facilitated by the metabolism of certain microbes - bioleaching microbes.Bioleaching is a process described as "the use of microorganisms to

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Bismuth resources, reserves and production-Metalpedia

The world reserves of bismuth containing ore stands at 320,000 tonnes and the reserve base is estimated to be 680,000 tonnes. The mined bismuth content production in 2013 can be seen in the table below. In 2013, worldwide total bismuth mining production was 7,600 tonnes, falling 0.7% (600 tonnes) compared with last year’s figure of 8,200 tonnes.

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Dissolution Kinetics of Sphalerite in Acidic Ferric ...

After leaching, tellurium and bismuth exist in the lixivium in the form of Te⁴⁺ or HTeO2⁺ and Bi³⁺, respectively. ... is the primary ore mineral for copper, but leaching of this mineral ...

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Mission 2015: Bioleaching

2011-12-1  Some question the use of bioleaching by claiming that it is a time consuming process. However a study by Mujeeb-ur-Rehman shows that 75 percent of the copper in the ore studied was leached in 144 hours. Leaching can be carried out in two stages

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Bismuth resources, reserves and production-Metalpedia

The world reserves of bismuth containing ore stands at 320,000 tonnes and the reserve base is estimated to be 680,000 tonnes. The mined bismuth content production in 2013 can be seen in the table below. In 2013, worldwide total bismuth mining production was 7,600 tonnes, falling 0.7% (600 tonnes) compared with last year’s figure of 8,200 tonnes.

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A method of processing bismuth concentrates

There is a method of extraction of bismuth sulfide ore comprising leaching the acidified restification process. There is also known a method of extraction of bismuth from sulphide ores, concentrates and dump intermediates, including leaching with dilute hydrochloric acid solutions in the presence of ferric chloride in which to increase the rate ...

Read More
PRESSURE LEACHING - RPMGlobal

2020-1-22  2) The increase in penalty elements in some ore bodies – the principal penalty element being found today is arsenic which is fixed through pressure oxidation, but other elements are sometimes found, depending on the ore body, including bismuth, etc. There are two principal copper concentrate pressure leaching

Read More
Study on Intensification Behavior of Bismuth Ions on Gold ...

Gold cyanide leaching is inefficient with conventional cyanidation. Bismuth ions can improve the efficiency of gold cyanidation by intensifying gold dissolution. The electrochemical behavior, structure information, and surface product of gold anodic dissolution were studied during the intensification of bismuth ions on gold cyanide leaching. The electrochemical analysis showed that the bismuth ...

Read More
Using Taguchi Method to Optimize Recovery of Bismuth

The recovered bismuth was calculated by mass balance using the analysis of the concentrate and the leach residue. The leaching solution was recycled to leach fresh concentrate until the bismuth concentration in solution was enriched to more than 70 g/L (by reaction 1). Bi2S3+NaClO3+6HCl→2BiCl3+NaCl+3H2O+3S (1)

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Mission 2015: Bioleaching

2011-12-1  Some question the use of bioleaching by claiming that it is a time consuming process. However a study by Mujeeb-ur-Rehman shows that 75 percent of the copper in the ore studied was leached in 144 hours. Leaching can be carried out in two stages

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Uranium Mining in Eastern Germany: The WISMUT Legacy

2016-2-22  In the case of Königstein, a total of 100,000 tonnes of sulfuric acid was injected with the leaching liquid into the ore deposit. At present, 1.9 million m 3 of leaching liquid are still locked in the pores of the rock leached so far; a further 0.85 million m 3 are circulating between the leaching zone and the recovery plant. The liquid ...

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刁江-材料科学与工程学院 - 重庆大学 - cqu.edu.cn

2018-11-1  2 ) Lixiong Shao, Jiang Diao*, Chengqing Ji, Gang Li, A Novel and Clean Process for Extracting Tellurium and Bismuth from Dashuigou Tellurium Ore by Oxidizing Leaching, Hydrometallurgy, 2020, 191(1): 105205.

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Research progress of non-cyanide gold leaching in gold

2020-11-15  With the exhaustion of easy-to-treat gold ore resources, gold ores containing arsenic, carbon, high sulfur, and ultrafine particles have become the focus of gold mining. These difficult-to-treat gold ores have poor leaching effects through conventional cyanide leaching methods. The chemicals involved in the production process are highly toxic, which can endanger human health and seriously ...

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Selective Pre-leaching of Tellurium From Telluride-Type ...

2021-3-25  The H 2 SO 4 + FeCl 3 oxidative leaching process was applied to leach bismuth telluride ore and the leaching rate of tellurium and bismuth could reach 95.61 and 95.77% (Shao et al., 2020). A large number of flotation experiments were carried out on bismuth tellurium deposits and the tellurium grade and recovery rate of obtained concentrate ...

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