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Harmless treatment method of gold cyanidation tailings highly containing arsenic

A technology of harmless treatment and cyanidation of tailings, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve problems such as low recovery rate, environmental pollution, and inability to obtain qualified products

Active Publication Date: 2014-06-04
湖南黄金洞矿业有限责任公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is, aiming at the low recovery rate of cyanidation tailings treatment in the prior art, qualified products cannot be obtained, and it contains highly toxic cyanide ions and heavy metal ions, which seriously pollutes the environment. The present invention provides a A harmless treatment method for highly arsenic-containing gold cyanide tailings, which can reduce the arsenic content in the tailings, make the cyanide tailings transition from Class II general industrial solid waste to Class I general industrial solid waste, and simultaneously recover Among them gold mine

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  • Harmless treatment method of gold cyanidation tailings highly containing arsenic

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Embodiment Construction

[0017] Such as figure 1 Shown, a kind of high arsenic-containing gold cyanide tailings harmless treatment method of the present invention comprises the following steps:

[0018] 1) Crushing: crush the gold cyanide tailings twice with a crusher, so that the particle size of the gold cyanide tailings is not greater than 10mm;

[0019] 2) Grinding: Send the crushed gold cyanide tailings into a ball mill, and add sodium carbonate, sodium sulfide, water glass and an appropriate amount of water into the ball mill for grinding, wherein the amount of sodium carbonate added is 1000g / t, sodium sulfide The addition amount of water glass is 200g / t, the addition amount of water glass is 100g / t, and the addition amount of water should make the grinding concentration reach 70%;

[0020] 3) Classification: The ground cyanide tailings are sent to the classifier for classification, and the coarse particles at the back end of the classifier are returned to the ball mill for regrinding. When th...

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Abstract

A harmless treatment method of gold cyanidation tailings highly containing arsenic mainly includes the steps that the gold cyanidation tailings are crushed twice and then fed into a ball mill for ore grinding, sodium carbonate, sodium sulphide and soluble glass are added in the ball-milling process, ores are made to be fully dispersed and vulcanized, the ph value of ore pulp is adjusted to be 8 to 9, after classification, coarse sand returns to the ball mill for second-time grinding, fine sand qualified in overflow enters a mixing tank for pulp mixing, after xanthate and copper sulfate are added to the fine sand for pulp mixing, the floatation technology including one time of roughing, two times of concentration and two times of scavenging is used for making concentrated products serve as ores to be sold, after bleaching powder is added to the scavenged tailings, the scavenged tailings are fed to a tailing pond in a winnowing mode, and after being clarified, overflow water of the tailing pond is fed back to a dressing plant for cyclic utilization. After the tailings are treated through the method, the content of arsenic in the tailings is greatly reduced, and a large number of useful ores are recycled.

Description

technical field [0001] The invention relates to a harmless treatment method for gold cyanide tailings, in particular to a harmless treatment method for gold cyanide tailings with high arsenic content. Background technique [0002] Cyanide tailings are terminal polymetallic wastes of acidic, alkaline, highly toxic cyanide ions and heavy metal components produced after gold ore is extracted by cyanidation heap leaching process, and are generally stored as tailings solid waste. The dumping of cyanidation tailings occupies a large amount of land, wastes mineral resources, highly toxic cyanide ions and heavy metal ions seriously pollute the environment, and can also cause major safety accidents such as landslides and mudslides. [0003] Due to the long heap leaching time, a large amount of waste slag left over from gold panning in and around the Huangjindong mining area in Yueyang, Hunan Province has been cemented, oxidized, and passivated, and the cyanided waste slag has been se...

Claims

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Application Information

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IPC IPC(8): B03B7/00B07C5/04B03D1/012B03D1/08B03D101/02B03D101/04
Inventor 邹尚陈俊彭竣刘方求胡飞跃徐卫明
Owner 湖南黄金洞矿业有限责任公司
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