Cyanogen-containing tailing slag treatment method

A technology of tailings slag and ore pulp, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of no advanced and mature cyanide-containing waste slag treatment methods, and achieve industrial application , The effect of stable system operation and high processing efficiency

Inactive Publication Date: 2015-09-23
CHANGCHUN GOLD RES INST
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Problems solved by technology

Judging from the current treatment of cyanide-containing waste residues in the domestic gold industry, there is no advanced and mature treatment method for cyanide-containing waste residues

Method used

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  • Cyanogen-containing tailing slag treatment method
  • Cyanogen-containing tailing slag treatment method

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[0038] Cyanide tailings slag from a gold mine, CN T 413.47mg / kg, Cu 2+ It is 82.56mg / kg, COD is 187.25mg / kg, and also contains trace amounts of other heavy metal ions. Take 1kg of tailings slag and put it in the stirring tank, add 1kg of water, stir and adjust the slurry for 30 minutes, then place the evenly adjusted slurry in the ozone oxidation tank, pass through ozone for oxidation reaction for 1 hour, the amount of ozone introduced is 1.46g, and then Put the ozonated pulp in a stirring tank, add dilute sulfuric acid to adjust the pH value of the pulp to 8.0, then 6mL of 35% hydrogen peroxide, filter after 30min, pass the slurry into the biological decyanide treatment reactor, and connect it to the For cyanogen bacteria, air is introduced, the gas-liquid ratio is 3:1, and the treatment is 2 hours. The treated slurry is pumped into the upflow biofilter with a gas-liquid ratio of 3:1, and the treatment is 1 hour. The filtered tailings slag was analyzed by toxicity leaching ...

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Abstract

The invention discloses a cyanogen-containing tailing slag treatment method. The method comprises five steps of slurry mixing, ozone oxidation, chemical catalytic oxidation, solid-liquid separation and deep up-to-standard treatment. During treatment of cyanogen-containing tailing slag, firstly, pollutants in ore slurry are removed with an ozone oxidation method and a chemical catalytic oxidation method, then, solid-liquid separation is performed, harmless stockpiling of the tailing slag is performed, and a slurry fluid is continuously subjected to slurry mixing of the tailing slag or further up-to-standard treatment for discharge. Due to the characteristics of complexity of the pollutants contained in cyanogen-containing tailing slag of a gold mine and difficulty in treatment, mixed slurry is subjected to solid-liquid separation after oxidation treatment, solids and liquids are treated respectively, accordingly, harmless treatment of the tailing slag and cyclic utilization or up-to-standard discharge of the mixed slurry fluid are realized, and the method has the advantages of good treatment effect, high treatment efficiency, stable system operation, simple and practical technological process, convenience in industrial application and the like.

Description

technical field [0001] The invention relates to a method for treating pollutants in the field of environmental protection, in particular to a method for treating cyanide-containing tailings. Background technique [0002] Since most gold mines in my country have been using the cyanidation gold extraction process, a large amount of cyanide-containing waste residue is accumulated in the tailings pond during the gold production process. With the expansion of gold production scale and the extension of mining history, the accumulation of cyanide-containing waste residue It is increasing year by year and takes up a lot of land. Because these waste residues contain cyanide and heavy metals, they become dangerous wastes that are common in gold mining enterprises. The surrounding environment and groundwater will be polluted due to rain infiltration. With the promulgation and implementation of the new environmental protection law, the gold mining enterprises of the domestic cyanide proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14B09B3/00B09B5/00
Inventor 李哲浩刘强杨飞莹王莹
Owner CHANGCHUN GOLD RES INST
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