Current status and improvement opinions of silver ore beneficiation and processing technology in China

In recent years, a series of preferential policies to encourage the country, our country gradually strengthen Total, intergrown ore beneficiation recovery of silver, many mines and refineries attention to the recovery of silver. However, in general, there is no significant development in mineral processing technology equipment, and the recovery rate of silver is not high. The silver content in different mine tailings is very high (10~30g/t), but it is not recycled. The technicians of Zhengzhou Xinhai Machinery Manufacturing Co., Ltd. said that to improve the beneficiation efficiency of silver mines, we must pay attention to the improvement of process technology.

After silver ore selected from the group (or smelt), the product obtained silver-containing ore concentrates silver, silver, and various mud of non-ferrous metals. At present, the former two are usually subjected to pyrolysis (reverberation furnace, electric furnace, crucible, blast furnace, flash furnace), or by hydrometallurgical separation and extraction, and then electrolytic refining; the latter is mainly in the process of smelting non-ferrous metals. Semi-silver is enriched and integrated into the anode mud (mainly copper and lead anode mud). In China, 98% of silver is recovered from smelting anode mud of various non-ferrous metal mines.

In order to improve the recovery rate of independent silver mine flotation, it is recommended to adopt three measures: First, aiming at the thickness characteristics of silver mineral inlay grain size, fully dissociate silver minerals as much as possible, and improve the recovery rate of silver; second, choose neutral Or weakly alkaline flotation slurry alkalinity and the use of sodium carbonate as a flotation slurry adjuster to improve the floatability of silver; third, the use of xanthate and black medicine to enhance the ability to capture silver.

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