Cyanide leaching device for gold ore

Abstract

The invention discloses a cyanide leaching device for gold ore. For overcoming the defects of small aeration quantity, dead zone existence, low leaching rate and high energy consumption in the currently-used agitation leaching groove, a leaching column is novel leaching equipment for combining cyclone separation with pipe flow strengthened leaching and achieving dual goals of grading and leaching in one equipment. According to the cyanide leaching device disclosed by the invention, the inspiratory capacity is increased and the turbulence level of gas, liquid and solid phases is improved by a bubble generator adopting a jet principle, so that the full air amount can be ensured and enough stirring strength is ensured. According to the pipe flow cycle intensifying leaching mode for a coarse fraction refractory leaching gold grain intergrowth body, strong pertinence is realized, the leaching rate of gold ore can be effectively increased and the cyanide leaching process of the gold ore is intensified.

Description

technical field [0001] The invention belongs to the technical field of mining and metallurgical engineering, and relates to equipment used in chemical mineral dressing and hydrometallurgy, in particular to a gold ore cyanide leaching device. Background technique [0002] Cyanidation is the most widely used production process in gold mines. At present, most of the cyanide leaching operations in my country's gold mines use mechanical agitation leaching tanks, and only a few enterprises use air agitation leaching tanks and combined air and mechanical agitation leaching tanks. [0003] The mechanical stirring leaching tank can only generate negative pressure and suck air when the stirring paddle rotates at high speed, so the suction volume will be limited by the rotating speed. Practice has shown that the air intake of the mechanically stirred leaching tank cannot meet the oxygen consumption of the electrochemical reaction and adsorption of gold, and the leaching process is alw...

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Problems solved by technology

[0003] The mechanical stirring leaching tank can only generate negative pressure and suction when the stirring paddle rotates at high speed, so the suction volume will be limited by the speed

Practice has shown that the air intake of the mechanically stirred leaching tank cannot meet the oxygen consumption of the electrochemical reaction and adsorption of gold, and the leaching process is always in a state of oxygen supply starvation.

[0004] In the mechanical stirring leaching tank, the rotation of the impeller and the shape of the bottom of the leaching tank also have a certain influence on the optimal oxygen supply mode. The bottom of the traditional stirring leaching tank is easy to form a dead zone, which is not conducive to cyanide leaching

[0005] Although the air-stirred leaching tank can make the oxygen content in the pulp close to the saturation value, it takes up a lot of space, requires a lot of investment, and consumes a lot of power. It is suitable for cyanide leaching that requires strong stirring and a large amount of aeration.

[0006] The filling of air in the stirring tank changes the specific gravity of local pulp, increases the power consumption of mechanical stirring, and makes a lot of power loss in the formation of pulp vortex and mechanical wear, so the energy efficiency is low

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