The Pinggui Smelter Refinery Workshop is a selection plant that combines re-election, magnetic separation and flotation, with complete mineral processing equipment and flexible mineral processing technology. With the depletion of Pinggui tin mining and mineral resources, selected works most of the time in a shutdown state, the production number two economic efficiency of enterprises seriously affected. In order to make full use of mineral resources, comprehensive recovery of a variety of useful metals, full use of existing idle equipment, increase the economic efficiency of enterprises, selected works of cassiterite - sulphide ore tailings were featured multi-metal comprehensive recovery of production.
The tailings are a reverse-flotation process of the cassiterite-sulfurized ore fine concentrate, and the sulfide product floated by the yellow medicine in the acidic pulp, which is accumulated for a long time, and the oxidation and agglomeration are more serious. Wherein the metal minerals are mainly cassiterite, arsenopyrite (arsenic pyrite), pyrrhotite, pyrite, sphalerite followed by a yellow and a small amount of copper ore Jamesonite lead ore, and gangue quartz sulfate Salt. The cassiterite is mainly in the form of continuum, closely related to gangue minerals, and is associated with pyrite. The finer the grain size, the higher the grade of tin, the higher the arsenic content and the higher the sulfur content.
According to the experimental research situation, the tailings are finally recovered by the principle of re-election-flotation-re-election, that is, firstly crushed, ground, and then enriched with tin and arsenic by spiral chute and shaker to obtain mixed concentrate. A large amount of tailings is discarded, and then flotation is carried out with sulfuric acid and butyl yellow box pine oil, and arsenic concentrate is selected, and the tailings are floated and then shaken to obtain tin concentrate and tin rich ore.
Through production, a tin concentrate of 35.4%, a recovery rate of 35.2% of tin concentrate and tin 2.6%, a recovery rate of 15.6% of tin rich ore and arsenic grade of 28%, a recovery rate of 65% of arsenic concentrate Good indicators have achieved the purpose of comprehensive utilization of mineral resources and increasing tin smelting raw materials, and achieved good economic and social benefits.
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