Back to Search
Start Over
Investigation into Oxygen-Enriched Bottom-Blown Stibnite and Direct Reduction.
- Source :
- Metallurgical & Materials Transactions. Part B; Aug2014, Vol. 45B Issue 4, p1281-1290, 10p
- Publication Year :
- 2014
-
Abstract
- The direct oxidation of stibnite (SbS) using a gas mixture of nitrogen-oxygen was investigated in a pilot plant. Steady-state pilot operation of 5 and 10 t/d was normally observed during the pilot test of 100 days, and a cleaning experiment of high-antimony molten slag from oxygen-enriched bottom-blown was tested by direct reduction in a laboratory-scale electric furnace. Autogenous smelting was achieved without adding any other fuel, which guaranteed the feasibility and advantage of oxygen-enriched bottom-blown stibnite. Through analysis and calculation, the sulfur dioxide concentration in offgas was more than 8 pct, which meets the requirement for the preparation of sulfuric acid. In the reduction experiment, the effects of added CaO, the ratio of coal ( ω = actual weight of coal/theoretical weight of coal), and the slag type on the reduction procedure were considered. The residual slag obtained after reduction averaged less than 1 g/ton Au and less than 1 wt pct Sb. The metal phase contained iron less than 3 wt pct, and the recoveries of Au in the metal phase were more than 98 pct. This process shows significant environmental and economic benefits compared with previous processes. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10735615
- Volume :
- 45B
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Metallurgical & Materials Transactions. Part B
- Publication Type :
- Academic Journal
- Accession number :
- 97332189
- Full Text :
- https://doi.org/10.1007/s11663-014-0055-6