First, the main method of flotation recovery of silver
From the multi-metal ores associated silver recovery, silver is often concentrated in the flotation concentrate, to be recovered in the smelting silver.
For silver-based ores, silver minerals are often enriched by a re-floating combined process or a single flotation process, and the silver concentrate is then chemically extracted.
Second, the flotation example
A silver mine in China is a low-temperature hydrothermal multi-metallic silver deposit. The metal minerals in the ore are mainly silver-silver or spiro-silver-silver ore, followed by natural silver. Associated with a small amount of copper, lead, zinc, sulfur, sulfides and oxides, metallic minerals accounted for 1.16%, the major gangue of quartz, feldspar and small amounts, sericite, etc., accounting for 98.84% of all minerals, ores of copper, Lead, zinc and sulfur minerals have a coarser grain size, while silver minerals have a finer grain size, generally between 0.074 and 0.005 mm. They are closely related to sulfide minerals and gangues, and good silver flotation is required. The index must be finely ground to recover silver by the combined process of flotation-flotation concentrate. The flotation process is simple, and a grinding process with controlled grading is adopted to control the graded overflow fineness of -200 mesh to 70%-80. %, flotation is a coarse and fine second sweep operation, flotation concentrate is removed from the drug and then sent to the leaching.
Flotation agent: xanthate 50 ~ 70g / t; black medicine 60 ~ 80g / t; 2nd oil 10 ~ 20g / t
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