Polymeric ore agglomeration aids

Details Polymeric ore agglomeration aids Polymeric ore agglomeration aids

C - Chemistry, Metallurgy

22

B

53/13, 53/229

C22B 11/00 (2006.01) C22B 1/244 (2006.01) C22B 3/04 (2006.01) C22B 11/08 (2006.01)

Patent

CA 1341274

Low grade gold and silver ores are leached by spray- ing barren cyanide solution onto a large heap of ore. As the solution percolates through the heap, the precious metal is dissolved out of the ore. The resulting pregnant solution is then collected for further processing. A major problem is segregation of fines in building the heap and migration of fines during percolation which results in channeling and/or blinding. To overcome the problem, the heap of ore is treated with an agglomerating agent which is a water-soluble vinyl polymer having a molecular weight of at least 500,000.

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