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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 high cost of standard treatment, unstable environmental protection, and the difficulty of direct treatment of cyanide-containing tailings slurry and other issues to achieve the effect of easy handling

Active Publication Date: 2013-05-08
SHAANXI TAIBAI GOLD MINING IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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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 the 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

[...

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Abstract

The invention discloses a harmless comprehensive treatment method for cyanide-containing tailing pulp. The method is composed of three steps including pulp concentration, cyanide-degradation pretreatment and oxidation, wherein the step of pulp concentration is implemented as follows: the concentration of pulp is increased to be 50% by using a thickener, and applyin liquid supernatant subjected to thickening is applied to a factory selection process, wherein a thickening principle is implemented as follows: solid-liquid separation is conducted by using gravity settling; the step of cyanide-degradation pretreatment is implemented as follows: a cyanide-degradation drug is put into the pulp subjected to concentration; and the step of oxidation is implemented as follows: oxidation is implemented by using a commonly used oxidation method, and meanwhile, activated carbon is put in the stage of oxidation. Useful cyanides are concentrated and recycled, so that the load of follow-up processing is reduced; through the step of cyanide-degradation pretreatment, the cyanide load of an oxidated part is reduced, cyanides such as ferric-cyanide which are difficult to oxidize are fixed, and an oxidant is saved; pulp can easily reach the standard in the process of oxidation treatment, and is stable; and tailing slag which reaches the standard through processing are common solid wastes.

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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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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