Basic theory and optimization of gold containing antimony concentrate leaching by alkaline sulfide

• Autorzy: Wu Hao , Feng Yali , Li Haoran , Liao Shengde , Wang Hongjun

Identyfikatory

DOI

10.5277/ppmp18126

• Języki publikacji: EN

Abstrakty

EN

As sodium sulfide is easily oxidized to polysulfide and thiosulfate which have a gold leaching effect, gold would dissolve in leaching solution when extracting stibium from gold containing antimony concentrate by alkaline sulfide. Through leaching test and kinetics analysis, the decomposition regularity of sodium sulfide and leaching rate were studied under different leaching conditions. The results indicated that the gold content in antimony concentrate was 28.41g/Mg, and the content of antimony and sulfur was 36.01% and 14.04%, respectively. The main metallic minerals were native gold, arsenopyrite, stibnite, and the gangue minerals were mainly quartz. Anodic polarization curve shows reduced iron powder can increase the peak potential of the oxidation of the leaching solution and it can effectively prevent the decomposition of sodium sulfide and the dissolution of gold. Optimized stibium-extraction efficiency was achieved under the following conditions: a concentration of sodium sulfide and sodium hydroxide at 110g/dm³ and 20g/dm³, respectively; a ratio of iron powder to concentrate of 1:30; a ratio of liquid to solid of 5:1; agitation speed of 600rad/min; reaction temperature of 353.15K; and a reaction time of 3 h. Under the optimized conditions, high antimony recovery (97.35%) and low gold dissolution (1.32%) were achieved.

Słowa kluczowe

EN

antimony concentrate; leaching process; alkaline leaching; kinetics

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 1
• Strony: 248--257
• Opis fizyczny: Bibliogr. 24 poz., rys., tab.

Twórcy

autor

Wu Hao

• School of Civil and Resource Engineering, University of Science and Technology Beijing China
• State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China)

autor

Feng Yali

• School of Civil and Resource Engineering, University of Science and Technology Beijing, China

autor

Li Haoran

• State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China)

autor

Liao Shengde

• School of Civil and Resource Engineering, University of Science and Technology Beijing, China

autor

Wang Hongjun

• School of Civil and Resource Engineering, University of Science and Technology Beijing, China

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).