The Recovery of Bismuth from Bismuthinite Concentrate Through Membrane Electrolysis

Peng, Si-Yao; Yang, Jian-Guang; Yang, Jianying; Liu, Jie

doi:10.1007/978-3-319-51085-9_30

Cited by 2 publications

(2 citation statements)

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“…Using FeCl 3 , Cl 2 , NaClO 3 , and MnO 2 as oxidizers, bismuthinite concentrate is first oxidatively leached in hydrochloric acid, nitric acid, or chloride solutions so that bismuth, iron, and copper are dissolved in the solution through the formation of metal-chloride ligands. After impurities are removed from the leaching solution, bismuth products are produced by cementation, neutralizing hydrolysis, and diaphragm electrowinning . Slurry electrolysis anodically oxidatively leaches bismuthinite concentrate, cathodically electrodeposits metallic bismuth, and regenerates the leaching agent in one device, which greatly simplifies the hydrometallurgical process.…”

Section: Introductionmentioning

confidence: 99%

“…After impurities are removed from the leaching solution, bismuth products are produced by cementation, 12 neutralizing hydrolysis, 13 and diaphragm electrowinning. 14 Slurry electrolysis anodically oxidatively leaches bismuthinite concentrate, cathodically electrodeposits metallic bismuth, and regenerates the leaching agent in one device, which greatly simplifies the hydrometallurgical process. To avoid the high volatility and severe occupational health hazards of the hydrochloric acid, nitric acid, and chloride solutions, Wang et al 15 fonic acid (MSA) as a leaching reagent to extract bismuth from bismuthinite concentrate by oxidative pressure leaching.…”

Section: ■ Introductionmentioning

confidence: 99%

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Reaction Mechanism and Technical Application of Metallic Bismuth Extraction from Bismuthinite Concentrate by Low-Temperature Alkaline Smelting

Jin

Yang

Tang

et al. 2023

ACS Sustainable Chem. Eng.

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Traditional bismuthinite concentrate precipitation smelting has problems of low recovery of valuable metals (e.g., Bi, Cu, Mo, and Ag), high fuel consumption, and high cost of SO 2 flue gas treatment. Therefore, in this study, an eco-friendly alkaline smelting process was proposed to extract metallic bismuth and recover valuable metals. The phase equilibrium composition of the Bi 2 S 3 -Na 2 CO 3 -C system was revealed by thermodynamic simulations at different temperatures and reductant contents. Based on reaction product characterizations and thermodynamic simulations, the following reaction mechanism and suitable bismuth extraction path were confirmed: Bi 2 S 3 first reacted with Na 2 CO 3 to form Bi 2 O 3 and Na 2 S, and the intermediate (Bi 2 O 3 ) was then reduced to metallic Bi by both C and CO. Under optimized conditions (W bismuthinite /W Na2CO3 /W coke = 200:300:20, 900 °C, 150 min), up to 96.56% Bi, 75.07% Pb, and 85.11% Ag were enriched in crude bismuth, respectively, while 93.57% Cu, 70.23% Fe, 96.63% Mo, and 94.34% W entered the salt slag. More than 99.9% W and Mo were recovered as Na 2 WO 4 and Na 2 MoO 4 , respectively, from the salt slag by water leaching. In the leaching residue, chalcopyrite, pyrite, and elemental sulfur could be recovered by flotation.

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