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Comprehensive utilization method of copper-containing acidic wastewater from mine

A technology for acid wastewater and mines, applied in the fields of metallurgical wastewater treatment, chemical instruments and methods, copper sulfide, etc., can solve the problems of high wastewater treatment cost, large wastewater volume, and small treatment capacity, and achieve low wastewater treatment cost and reduced treatment. Cost, effect of low iron acid concentration

Inactive Publication Date: 2019-08-16
ZIJIN MINING GROUP
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  • Abstract
  • Description
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Problems solved by technology

[0004] Because the composition of copper-containing acidic wastewater in mines is complex and the properties are quite different, even the properties of copper-containing acidic wastewater in different areas of the same mine are quite different. Therefore, the above three treatment methods have the disadvantages of poor wastewater treatment effect and high wastewater treatment costs. High and low comprehensive utilization of copper
Specifically, the lime neutralization method cannot comprehensively recover copper, and the sulfide precipitation method is suitable for treating low-concentration copper-containing acidic wastewater. The ion exchange method has problems such as poor resin selectivity and large wastewater volume, and the operating cost of membrane treatment technology High, the treatment capacity of the biological method is small and the technology is not yet mature, so far there is no previous literature report on similar differential treatment

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  • Comprehensive utilization method of copper-containing acidic wastewater from mine

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Effect test

Embodiment 1

[0033] A mine produces 8 million m3 of copper-containing acidic wastewater every year 3 , with an average copper concentration of 0.66g / L. According to the classification of wastewater properties, 3 million m 3 Copper-containing acidic wastewater with a copper concentration of 1.3g / L, 3 million m 3 Copper-containing acid wastewater with a copper concentration of 0.46g / L and 2 million m 3 Copper-containing acidic wastewater with a copper concentration of 0.06g / L. Copper-containing acidic wastewater with a copper concentration of 1.3g / L is treated by the "extraction-electrowinning" process, 2 million m 3 Copper-containing acid wastewater with a copper concentration of 0.46g / L is used to prepare the spray solution for copper ore bioheap leaching, 1 million m 3 Copper-containing acid wastewater with a copper concentration of 0.46g / L is treated with a sulfidation precipitation process, and copper-containing acid wastewater with a copper concentration of 0.06g / L, raffinate, and ...

Embodiment 2

[0035] A mine produces 8 million m3 of copper-containing acidic wastewater every year 3 , with an average copper concentration of 0.71g / L. According to the classification of wastewater properties, 3 million m 3 Copper-containing acidic wastewater with a copper concentration of 1.5g / L, 3 million m 3 Copper-containing acid wastewater with a copper concentration of 0.40g / L and 2 million m 3 Copper-containing acidic wastewater with a copper concentration of 0.05g / L. Copper-containing acidic wastewater with a copper concentration of 1.5g / L is treated by the "extraction-electrowinning" process, 2 million m 3 Copper-containing acid wastewater with a copper concentration of 0.40g / L is used to prepare the spray solution for copper ore bioheap leaching, 1 million m 3 Copper-containing acid wastewater with a copper concentration of 0.40g / L is treated with a sulfidation precipitation process, and copper-containing acid wastewater with a copper concentration of 0.05g / L, raffinate, and ...

Embodiment 3

[0037] A mine produces 8 million m3 of copper-containing acidic wastewater every year 3 , with an average copper concentration of 0.54g / L. According to the classification of wastewater properties, 3 million m 3 Copper-containing acidic wastewater with a copper concentration of 0.95g / L, 3 million m 3 Copper-containing acid wastewater with a copper concentration of 0.48g / L and 2 million m 3 Copper-containing acidic wastewater with a copper concentration of 0.05g / L. Copper-containing acidic wastewater with a copper concentration of 0.95g / L is treated by the "extraction-electrowinning" process, 2 million m 3 Copper-containing acid wastewater with a copper concentration of 0.48g / L is used to prepare the spray solution for copper ore bioheap leaching, 1 million m 3 Copper-containing acid wastewater with a copper concentration of 0.48g / L is treated with a sulfidation precipitation process, and copper-containing acid wastewater with a copper concentration of 0.05g / L, raffinate, an...

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Abstract

The invention relates to a comprehensive utilization method of a copper-containing acidic wastewater from a mine. The comprehensive utilization method comprises the following steps: firstly performingclassified storage: according to the properties of the copper-containing acidic wastewater from the mine, dividing the copper-containing acidic wastewater from the mine into three classes, i.e. A, Band C, and storing the three classes of acidic wastewater separately; then, after mixing the class A acidic wastewater with the solution of a copper-ore bio-heap leaching, performing extraction-electrodeposition to obtain a raffinate and a product of cathode copper; preparing a spray solution: using a portion of the class B wastewater to prepare the spray solution of the copper-ore bio-heap leaching, after controlling the redox potential, the iron concentration and the sulfuric acid concentration, spraying the portion of the class B wastewater to the bio-heap leaching to obtain a leaching solution, and subjecting the leaching solution to extraction-electrodeposition; sulfide precipitation: subjecting the remaining class B wastewater to sulfide precipitation, and controlling the electric potential at the end point of the sulfide precipitation reaction to obtain a solution after the precipitation of the copper sulphide and a product of copper sulphide slag; and neutralization: subjectingthe class C acidic wastewater, the solution obtained after the precipitation of the copper sulphide and the raffinate to neutralization, and discharging the wastewater to the external environment after meeting the standard. The comprehensive utilization method has the advantages of classification and differentiation of the wastewater, maximum recovery of copper, low processing cost, turning of the waste into treasure, significant economic and social benefits and so on, and is suitable for application in the mining and metallurgy industries.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of copper-containing acidic wastewater in mines, which is suitable for application in the mining and metallurgy industry. Background technique [0002] During the mining process of copper ore, under the joint action of air, water and microorganisms, the sulfide in the ore is oxidized, decomposed and leached to produce sulfuric acid and metal sulfate, forming acidic wastewater containing metal ions such as copper, iron and zinc. , the industry is collectively referred to as "copper-containing acid wastewater from mines". Although the copper concentration of copper-containing acid wastewater from mines is not high, due to its large amount of water, the total amount of copper metal contained is indeed very considerable, so the treatment and utilization of copper-containing acid wastewater is very important. Common problems common in copper mines. [0003] At present, there are three main met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/12C22B3/26C22B7/00C22B15/00C01G3/12C02F9/04C02F103/16C02F101/20
CPCC01G3/12C02F1/5236C02F1/66C02F2101/20C02F2103/16C22B7/007C22B15/0069C25C1/12C22B3/26Y02P10/20
Inventor 陈景河蓝碧波江城黄怀国范红春张玲文熊明熊明瑜谭希发彭钦华黄中省罗增鑫沈镇馨丘晓斌刘晓英
Owner ZIJIN MINING GROUP