Method for treating and recycling lead-zinc sulfide ore dressing wastewater

A lead-zinc sulfide and mineral processing wastewater technology, applied in mining wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. problems, to achieve the effect of eliminating the impact and prolonging the service life

Active Publication Date: 2010-12-15
HUNAN HERMES SAFE ENVIRONMENT PROTECTION SCI
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Problems solved by technology

[0008] At present, the recycling rate of mineral processing wastewater in the domestic lead-zinc mineral processing industry is relatively low, and the degree of resource utilization is not high. According to incomplete statistics, the wastewater reuse rate of domestic large and medium-sized lead-zinc mineral processing enterprises is lower than 75%. The main problem is: the backwater system is complicated, and the operation and management cannot keep up with it, which often leads to abnormal system backwater and unstable water quality, making it dif

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  • Method for treating and recycling lead-zinc sulfide ore dressing wastewater
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  • Method for treating and recycling lead-zinc sulfide ore dressing wastewater

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[0036] Example 1: Regarding the treatment of the beneficiation wastewater produced by the lead-zinc sulfide mine of Hunan Baoshan Nonferrous Metal Mining Co., Ltd. by using the combined application technology of potential control flotation and environmental collectors. The quality of the wastewater is shown in Table 1. First, use 10% sulfuric acid to adjust the wastewater PH value to PH=10.24, then add a certain concentration of ferrous sulfate and flocculant polyacrylamide, stir, let stand for 60 minutes and then sample for analysis. When the dosage of ferrous sulfate is 50-200mg / l, add the flocculant When the amount is 1.0 mg / l, the concentration of heavy metal ions, CODcr, and petroleum in the treated water have reached a relatively low level, and the water quality is relatively clear. The treatment results are shown in Table 2.

[0037] Table 1 Composition of beneficiation wastewater Unit: mg / l

[0038] project

[0039] Table 2 Oxidation-flocculation treatment results of min...

Example Embodiment

[0041] Example 2: Regarding the beneficiation wastewater produced by the lead-zinc sulfide mine of Hunan Baoshan Nonferrous Metals Mining Co., Ltd., adjust the PH value to PH=9.5, then add a certain concentration of ferrous sulfate and flocculant, stir, stand for 60 minutes and take it Clear liquid, add chlorine dioxide to the treated water, and sample and analyze after 60 minutes of oxidation. When the dosage of ferrous sulfate is 100mg / l, when the dosage of 3# flocculant (polyacrylamide) is 1.0mg / l , When the dosage of chlorine dioxide is 10-20mg / l, the concentration of heavy metal ions, phenol, CODcr, etc. in the treated water will reach a low level, and the water quality will be relatively clean, which can meet the comprehensive sewage discharge standards of relevant countries. The treatment results are shown in the table. 3.

[0042] Table 3 Oxidation treatment results after flocculation treatment of beneficiation wastewater Unit: mg / l

[0043] Chlorine dioxide (mg / l)

Example Embodiment

[0044] Example 3: Add a certain concentration of ferrous sulfate and flocculant (polyacrylamide) to the beneficiation wastewater whose pH value is adjusted to PH=9.5, stir, let stand for 60 minutes, take the supernatant liquid, and add dioxide to the treated water Chlorine 20mg / l, after oxidation for 30 minutes, it is treated with a reaction bed using activated carbon as the medium, activated carbon bed device (see figure 2 ) Device size: φ18×20cm; activated carbon filling height: 16cm, when ferrous sulfate dosage is 100mg / l, 3# flocculant dosage is 1.0mg / l, chlorine dioxide is 20mg / l, adsorption device When the residence time is 30 minutes, the phenol, petroleum, and CODcr in the treated water reach a lower level, and the water quality is clearer. The analysis results of the treated water are shown in Table 4.

[0045] Table 3 Catalytic oxidation adsorption treatment results after flocculation oxidation treatment of mineral processing wastewater unit mg / l

[0046] Catalytic ...

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Abstract

The invention provides a technique for treating and recycling lead-zinc ore dressing wastewater and aims to solve the problems of influence on the ore dressing index due to the recycling of the ore dressing wastewater for production and environmental pollution caused by drainage. The novel technique for treating and recycling the lead-zinc sulfide ore dressing wastewater comprises the steps of: adjusting the pH value of the total wastewater of an ore dressing plant; adding ferrous sulfate and flocculant into the wastewater to perform oxidation-coagulation treatment; and oxidizing the treated water by using chlorine dioxide, and performing catalytic oxidation and adsorption by using an active carbon bed, so that the treated water reaches the relevant discharge standard of China; and totally recycling the treated water by adopting the combined application of potential-controlled flotation and an environmental-protection collector. Compared with the field process technique, the method saves the cyanide flotation process and improves the recovery rates of lead, zinc and gold. The method provides whole technical integration of the combined application technique of the potential-controlled flotation and the environmental-protection collector and the wastewater treatment technique for the treatment and recycling of the lead-zinc ore dressing wastewater, and realizes recycling of the ore dressing wastewater.

Description

technical field [0001] The invention relates to a method for treating and reusing mine beneficiation wastewater, in particular to a technology for treating and reusing lead-zinc ore beneficiation wastewater. Background technique [0002] my country is rich in lead-zinc ore resources, mainly sulfide ore. With the development of my country's lead-zinc mineral processing industry, lead-zinc mines are one of the main sources of heavy metal pollution, and the environmental pollution caused by the discharge of mineral processing wastewater is becoming increasingly serious, especially for water. damage of environment. Implement mineral processing wastewater treatment and reuse, realize zero discharge of mineral processing wastewater, increase industrial water reuse rate, not only save water resources, but also reduce the discharge of heavy metal pollutants, thereby achieving clean production. [0003] In the beneficiation process of lead sulfide ore, a large number of flotation age...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/10
Inventor 彭新平陈伟陈代雄刘锡桂吴兆清王仁芳
Owner HUNAN HERMES SAFE ENVIRONMENT PROTECTION SCI
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