Clean and Efficient Recovery of Valuable Metals from Bismuth Sulfide Concentrate by Low-Temperature Alkaline Smelting

Release time:2026-04-10

Impact Factor:2.3

DOI number:10.1007/s11837-024-06466-w

Journal:JOM

Abstract:The traditional bismuth sulfide concentrate smelting process had the problems of low direct recovery rate of metallic bismuth, low extraction rate of associated valuable metal elements, and SO2 flue gas pollution. In this paper, alkaline smelting has been proposed to realize one-step extraction of metallic bismuth from bismuth sulfide concentrate and immobilization of sulfur in molten salt. The influences of smelting temperature, Na2CO3 addition, and reduced coke dosage on the direct recovery rate of metallic bismuth and sulfur-fixing rate have been investigated in detail. Under the optimum conditions (smelting temperature 900 degrees C, WNa2CO3:WConcentrate = 15%, WCoke:WConcentrate = 10%), the direct recovery rate of metallic bismuth was 95.98% and 99.16% sulfur was fixed in the molten salt. More than 99% Mo and W in the raw material entered into the molten salt, and dissolved in the leach solution in the form of Na2MoO4 and Na2WO4 after water leaching. 20% N235-40% sec-caprylic alcohol-40% sulfonated kerosene organic phase was used as extractant, and 94.48% Mo and 99.49% W were extracted from the organic phase by shaking at 25 degrees C for 10 min with O/A of 1:1. Ammonia was then used for stripping, and the stripping efficiencies of Mo and W reached 96.18% and 93.85%, respectively.

Indexed by:Journal paper

Discipline:Engineering

First-Level Discipline:Metallurgical Engineering

Document Type:J

Volume:76

Issue:7

Page Number:3385-3392

Translation or Not:no

Date of Publication:2024-07-01

Included Journals:SCI、EI、SSCI