1. 贵州某氰化尾渣金回收试验研究.
- Author
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黄裕卿, 李 广, 纪婉颖, 周利华, and 刘 鹏
- Subjects
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GOLD , *FLOTATION , *CYANIDES , *CYCLONES , *LEACHING - Abstract
Certain cyanide leaching tailings in Guizhou contain 1.66 g/t of gold, primarily existing in the forms of exposed gold and sulfide-encapsulated gold. The tailings have a high fineness, with particles of 0.038 mm accounting for over 80%. Given the high slime content of the cyanidation tailings, a sand-slime separation process was employed. Cyclones are used for grading and flotation is performed for the recovery of the underflow and overflow separately. A closed-circuit test with roughing once, scavenging twice, and cleaning three times was conducted, with process parameters and reagent regimes tailored to the characteristics of the underflow and overflow. The sand-slime separation process achieved a concentrate with a gold grade of 12.42 g/t and a gold recovery rate of 50.13%, while the ungraded flotation process of the cyanidation tailings produced a gold concentrate with a grade of 9.49 g/t and a recovery rate of 38. 10%. The results indicate that the sand-slime separation process improved the gold grade by approximately 2.9 g/t and the gold recovery rate by about 12 percentage points, effectively recovering gold from the cyanidation tailings. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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