Method for comprehensively recycling valuable metals from cyanidation tailings

A technology for cyanidation of tailings and valuable metals, applied in the direction of improving process efficiency, etc., can solve the problems of low grade of coarse gold powder, low gold and silver recovery rate, and high production cost, achieve high metal recovery rate and shorten the process flow. , the effect of improving the quality

Inactive Publication Date: 2018-01-09
BEIJING GENERAL RES INST OF MINING & METALLURGY
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Problems solved by technology

[0006] In order to solve the problem of low recovery rate of gold and silver, high production cost, low comprehensive recovery rate of valuable metals such as copper, lead and zinc, low grade of coarse gold powder, and easy secondary pollution and other technical problems, the present invention provides a method for comprehensive recovery of valuable metals from cyanidation tailings, which not only consumes less reagents, has low volatilization temperature, low production cost, and can realize comprehensive recovery of various valuable metals, but also has High recovery rate of valent metals, simple operation, environmental friendliness, easy to realize industrial production, and realize the harmless, reduction and resource utilization of cyanide tailings

Method used

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  • Method for comprehensively recycling valuable metals from cyanidation tailings

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Embodiment 1

[0057] like figure 1 As shown, a method for comprehensive recovery of valuable metals from cyanide tailings is used to treat a certain cyanide tailings. The main components of the cyanide tailings are: Au 6.43g / t, Ag 12.69g / t t, Fe 28.2wt%, S 1.0wt%, Cu0.064wt%, Pb 0.102wt%, Zn 0.153wt%, SiO 2 37.71wt%, As 0.55wt%, and the particle size of the cyanide tailings is -200 mesh, which accounts for 90%; the specific processing steps of the method for comprehensive recovery of valuable metals from the cyanide tailings are as follows figure 1 And described in above-mentioned step A to step I, thereby can reclaim multiple valuable metals such as gold, silver, copper, zinc, lead, and gold volatilization rate is 93.5%, silver volatilization rate is 68%, copper volatilization rate is 83.1%, The lead volatilization rate was 92.4%, the zinc volatilization rate was 78.6%, the gold recovery rate was 92.1%, the silver recovery rate was 66.6%, the copper recovery rate was 82.0%, the lead reco...

Embodiment 2

[0059] like figure 1 As shown, a method for comprehensive recovery of valuable metals from cyanide tailings is used to treat a certain cyanide tailings. The main components of the cyanide tailings are: Au 3.06g / t, Ag 19.2g / t t, Fe 22.19wt%, S 2.80wt%, Cu0.36wt%, Pb 0.26wt%, Zn 0.17wt%, As 0.99wt%, SiO 2 36.0wt%, and the particle size of the cyanide tailings is -200 mesh, accounting for 85%; the method for comprehensive recovery of valuable metals from the cyanide tailings, its specific processing steps are as follows figure 1 And described in above-mentioned step A to step I, thereby can reclaim multiple valuable metals such as gold, silver, copper, zinc, lead, and gold volatilization rate is 91.8%, silver volatilization rate is 63%, copper volatilization rate is 85.1%, The lead volatilization rate was 91.8%, the zinc volatilization rate was 76.6%, the gold recovery rate was 91.2%, the silver recovery rate was 60.6%, the copper recovery rate was 83.5%, the lead recovery rate...

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Abstract

The invention discloses a method for comprehensively recycling valuable metals from cyanidation tailings. The method comprises the following steps: fully mixing dried cyanidation tailings with a calcium chloride solution, wet grinding the mixed materials, granulating, drying and carrying out chlorination roasting in a rotary kiln to obtain high-temperature smoke containing valuable metals; washingthe high-temperature smoke to obtain a washing solution; carrying out concentration and pressure filtration of the washing solution to obtain gold chloride mud filter cake and filtrate containing valuable metals; adding iron powder into the filtrate containing valuable metals, and replacing to obtain iron powder gold mud and replaced filtrate; carrying out preneutralization, iron powder replacement and lime neutralization of the replaced filtrate to obtain gypsum residues, copper sponge and lead-zinc residues; carrying out chlorination and gold separation of the iron powder gold mud to obtaina chlorination and gold separation solution; carrying out ammonia water silver separation and hydrazine hydrate reduction of gold separation residues to obtain silver powder. The method is low in consumption of reagents low in production cost and is capable of comprehensively recycling multiple valuable metals; meanwhile, the method is high in recycling rate and simple to operate, and is environmentally friendly; the industrial production is easily achieved; harmlessness , reduction and reclamation of the cyanidation tailings are achieved.

Description

technical field [0001] The invention relates to the technical field of cyanide tailings treatment, in particular to a method for comprehensively recovering valuable metals from cyanide tailings. Background technique [0002] At present, most of my country's gold mining enterprises adopt the cyanide gold extraction process (the cyanide gold extraction process includes the whole mud cyanide gold extraction process, the flotation gold concentrate cyanide gold extraction process, and the low-grade gold ore heap leaching process) to produce Gold, and these cyanide gold extraction processes will produce a large amount of cyanide tailings every year. The storage and disposal of these cyanide tailings will not only make the gold, silver, copper, lead, zinc and other valuable metals contained in the cyanide tailings unable to be effectively recycled, but also occupy a large amount of land and cause serious harm to the environment. [0003] In recent years, people have tried many meth...

Claims

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Application Information

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IPC IPC(8): C22B1/08C22B7/00C22B11/06
CPCY02P10/20
Inventor 郭持皓袁朝新胡磊常耀超孙留根李大江徐晓辉黄海辉孙聪余群波韦其晋王为振梁东东孙彦文
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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