Harmless comprehensive treatment method for cyanide-containing tailing pulp

A comprehensive treatment and harmless technology, applied in mining wastewater treatment, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problem of high standard treatment cost, difficulty in direct treatment of cyanide-containing tailings slurry, unstable environmental protection treatment and other problems to achieve the effect of easy handling

Active Publication Date: 2014-04-02
SHAANXI TAIBAI GOLD MINING IND CO LTD
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Problems solved by technology

[0054] The purpose of the present invention is to provide a new harmless comprehensive treatment method for cyanide-containing tailings pulp used in the gold industry. The present invention solves the current environmental protection treatment that is difficult to directly treat cyanide-containing tailings pulp, high-standard treatment costs, and unstable. question

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  • Harmless comprehensive treatment method for cyanide-containing tailing pulp
  • Harmless comprehensive treatment method for cyanide-containing tailing pulp
  • Harmless comprehensive treatment method for cyanide-containing tailing pulp

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Embodiment

[0080] Using the present invention to carry out comprehensive treatment expansion test of "slurry concentration + cyanide reduction pretreatment + Inco method oxidation" on the cyanide-containing tailings pulp produced in the actual production process of a gold mine, the processing capacity is 240m 3 / d, see Table 1 for the treatment results of cyanide-containing tailings pulp, and Tables 2, 3 and 4 for the toxic leaching results of cyanide-containing tailings pulp.

[0081] Table 1 Water quality results after treatment of cyanide-containing tailings slurry Unit: mg / L

[0082]

[0083] Table 2 Overturn oscillation method Unit: mg / L

[0084] sample number

Parallel 1

Parallel 2

[0085] Analysis results CN T

0.23

0.29

Leaching toxicity identification standard value CN T

5

5

[0086] Table 3 Sulfuric acid nitric acid method Unit: mg / L

[0087]

[0088] Table 4 Horizontal shaking method Unit: mg / L

[0089...

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Abstract

A harmless comprehensive treatment method for a cyanide tailing pulp, consisting of three steps: pulp concentration, a cyanide-reducing pre-treatment and oxidation; for the pulp concentration: a concentration of the pulp is increased to 50% by using a thickening device, the thickened supernatant is reused in concentration plant technology, wherein in the thickening device a solid-liquid separation is performed by gravitational sedimentation; for the cyanide-reducing pre-treatment: a cyanide-reducing agent is added into the concentrated pulp; for the oxidation: the oxidation is implemented by a commonly used oxidation method, and meanwhile, activated carbon is added at the oxidation stage. Useful cyanides are recovered using the concentrating treatment, reducing the load of a subsequent treatment; the cyanide-reducing pre-treatment reduces the cyanide load for the oxidation, fixes cyanides which are difficult to oxidize, such as iron cyanide and so on, thus saving the oxidant; the pulp can easily reach the standard during the oxidation treatment, and is stable; and the tailing slag which reaches the standard by processing is a common solid waste.

Description

technical field [0001] The invention relates to a treatment method for cyanide-containing tailings pulp, in particular to a harmless comprehensive treatment method for cyanide-containing tailings pulp. Background technique [0002] Sodium cyanide gold leaching and activated carbon adsorption are the current mainstream gold extraction processes in gold mines. The cyanide-containing tailings slurry produced by it is harmful to the natural environment during the stacking process and needs to be harmlessly treated. [0003] 1. Current status and development trend of harmless treatment technology of cyanide-containing tailings pulp [0004] In recent years, the harmless treatment of cyanide-containing tailings slurry has been gradually paid attention to. There are two types of treatment methods. One is to carry out comprehensive treatment of tailings slurry by pressure filtration, dry stacking of filter residue, and filtrate, and reuse or discharge after treatment; One is the di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F103/16
CPCC02F1/72C02F1/78C02F1/722C02F2101/18C02F2103/10
Inventor 李哲浩范亚锋龙振坤左玉明申波
Owner SHAANXI TAIBAI GOLD MINING IND CO LTD
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