A method for reducing total cyanide concentration in tailings during gold ore beneficiation
A gold mining and concentration technology, applied in chemical instruments and methods, wet separation, process efficiency improvement, etc., can solve problems such as difficulty in meeting national environmental protection requirements, failure to meet emission standards, etc., achieve significant leaching effect, reduce The total cyanide concentration and the effect of reducing production cost
Active Publication Date: 2020-12-11
赤峰柴胡栏子黄金矿业有限公司
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In the prior art, the cyanide leaching of raw ore is directly used, and the total cyanide concentration of the leaching residue is 80ppm, which is much higher than the 0.5ppm stipulated by the environmental protection. Leaching can reduce the total cyanide concentration of the leaching residue to 5ppm, which is still not up to the discharge standard. Therefore, although the use of low-cyanide leaching gold can reduce the total cyanide concentration of the cyanide leaching tailings to a large extent, it is still difficult to achieve National Environmental Protection Requirements
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[0028] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention, and the described embodiments are only some of the embodiments of the present invention, not all of them.
[0029] Such as Figure 1 to Figure 3 As shown, a method for reducing the total cyanide concentration of tailings in a gold ore beneficiation process, the method specifically includes the following steps:
[0030] Step (1), raw ore grinding: mix the raw ore particles with water to make slurry, and then grind the ore until the fineness is -0.043mm and the content is 79%;
[0031] Step (2), re-election to obtain gold concentrate and tailings: mix the raw ore grinding product obtained in the above step (1) with fluidized water for slurry preparation, and separate the ore at a concentration of 50% and a separation gravity of 80G And under the reaction condition of fluidized water volu...
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The invention discloses a method for reducing the total cyanide concentration of tailings in a gold ore beneficiation process. The method for reducing the total cyanide concentration of the tailings comprises the following steps that raw ore grinding is carried out, the raw ore particles and the water are mixed, the ore is ground until the fineness is -0.043 mm and the content of the ore is 79%; the gold ore concentrate and the tailings are re-selected, the raw ore grinding products obtained in the raw ore grinding step with fluidized water are mixed, and the ore pulp is re-selected by a reselecting machine to obtain gold concentrate and reselection tailings; and the heavy tailings are leached to obtain pregnant solution and leaching residue, and carrying out low-cyanogen leaching on the reselection tailings obtained in the previous step by using a low-cyanogen leaching agent for 36 hours, and solid-liquid separation is carried out to obtain the pregnant solution and the leaching residue. According to the method for reducing the total cyanide concentration of tailings, gold in the gold ore can be effectively recovered, and the total cyanide concentration of the leaching slag is reduced to be below the environment-friendly standard; the low-cyanogen reagent DJX is used for leaching, so that the leaching effect is remarkable, the concentration of the total cyanogen in the tailings can be further reduced, so that the environment-friendly emission requirements of the tailings can be met.
Description
technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a method for reducing the total cyanide concentration of tailings in the gold ore beneficiation process. Background technique [0002] Cyanide leaching of gold is the most widely used method of gold ore treatment in the existing technology. In order to improve the leaching index of gold ore in production, metallurgical enterprises generally increase the amount of leaching chemicals, resulting in serious excess of total cyanide concentration in tailings. However, excessive free cyanide in the tailings will seriously pollute the surrounding environment and water quality. With the popularization of the concept of environmental protection and the improvement of national environmental protection policies, metallurgical enterprises have to consider the environmental protection of tailings in the process of processing gold ore, that is, they need to find ways to r...
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IPC IPC(8): B03B5/00C22B11/08
CPCY02P10/20
Inventor 杨新华王成韩跃新蒋旺徐广平李艳军吕良张文涛李春晖任彬彬鲍立伟王建伟张惠昱王增祥焦永刚
Owner 赤峰柴胡栏子黄金矿业有限公司