Treatment and reuse method for wastewater containing copper-cyanogen complex

A technology for wastewater treatment and complexes, which is applied in metallurgical wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc. It can solve the problem of high cost, achieve low cost, no secondary pollution, and high copper recovery rate Effect

Inactive Publication Date: 2012-10-17
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The recycling method is in line with my country's current energy-saving and emission-reduction policies, but the cost is usually higher

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0013] The initial conditions of wastewater are: total cyanide concentration, 3200mg / L; pH value, 10.5; copper ion concentration, 1800mg / L. The operation method is as follows: take 1000 mL of the waste water, add 1 g of elemental aluminum powder, fully stir the waste water and the aluminum powder, react for 2 hours, and perform centrifugation. The content of copper ions in the supernatant was measured to be 212mg / L, and the removal rate of copper ions was 88.2%.

Embodiment 2

[0015] The initial conditions of wastewater are: total cyanide concentration, 3800mg / L; pH value, 10.0; copper ion concentration, 2100mg / L. The operation method is as follows: take 1000mL of the waste water, add 2g of elemental aluminum flakes, stir the waste water for 2.5 hours, transfer the waste water to another beaker, add 2mL of coagulant for coagulation and precipitation for 30 minutes. The content of copper ions in the supernatant was measured to be 393mg / L, and the removal rate of copper ions was 81.3%. The coagulant is polyaluminum chloride with a concentration of 10g / L.

Embodiment 3

[0017] The initial conditions of wastewater are: total cyanide concentration, 3500mg / L; pH value, 11.5; copper ion concentration, 2050mg / L. The operation method is as follows: take 1000 mL of the waste water, add 2 g of elemental phosphorus powder, fully stir the waste water and phosphorus powder, react for 3 hours, and filter and separate. The content of copper ions in the filtrate was measured to be 228 mg / L, and the removal rate of copper ions was 88.9%.

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Abstract

The invention discloses a treatment and reuse method for wastewater containing a high-concentrate copper-cyanogen complex, and the method comprises the following steps: adding a reducing agent into the wastewater containing copper-cyanogen complex; reacting for 1 to 5 hours while stirring; and performing solid-liquid separation on the wastewater, wherein the treated cyanogen-containing wastewatercan be recycled to realize zero discharge of the wastewater, and the reducing agent is elementary substance aluminum or elementary substance phosphorus. The treatment and reuse method for the wastewater containing the copper-cyanogen complex is simple in operation, and has the advantages of low cost, no secondary pollution and high copper yield.

Description

technical field [0001] The invention relates to a wastewater treatment and reuse method containing copper cyanide complex. Background technique [0002] Cyanide gold extraction has a history of 100 years, and it has been one of the most important methods of gold extraction in gold mines. Many gold deposits are often associated with other metal deposits, such as chalcopyrite. In the process of cyanide gold extraction, copper ions in chalcopyrite can also form complexes with cyanide. Because cyanide is usually recycled many times in the gold extraction process, a large amount of cyanide in the barren solution is complexed with copper ions, and the high concentration of copper-cyanide complex greatly affects the gold extraction effect. At present, the wastewater treatment methods containing copper cyanide complexes are mainly divided into two categories, one is destructive treatment methods, which mainly destroy cyanide through oxidation methods, such as sulfur dioxide-air me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/62C02F103/16
Inventor 饶品华苏磊柴露鸿余欣烨孙冬雪
Owner SHANGHAI UNIV OF ENG SCI
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