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Method for treating and recycling copper-zinc sulphide ore separation waste water

A technology for beneficiation wastewater and sulfide ore, which is applied in mining wastewater treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of less research on the treatment process of copper-zinc sulfide ore beneficiation wastewater, and save the consumption of flotation reagents , The process is simple and the effect of less slag

Pending Publication Date: 2019-04-12
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, more attention has been paid to the treatment process of metal sulfide ore beneficiation wastewater, but there are few studies on the treatment process of copper-zinc sulfide ore beneficiation wastewater.

Method used

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  • Method for treating and recycling copper-zinc sulphide ore separation waste water
  • Method for treating and recycling copper-zinc sulphide ore separation waste water
  • Method for treating and recycling copper-zinc sulphide ore separation waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Table 1 shows the water quality of copper-zinc sulfide ore dressing wastewater before and after comprehensive treatment by sulfide precipitation method and coagulation sedimentation method.

[0025] Table 1 Water quality status of beneficiation wastewater

[0026]

[0027] Note: The discharge standard refers to the primary sewage discharge standard in GB8978-1996

[0028] The integrated process such as figure 1 As shown, that is to add a certain amount of precipitant to the copper-zinc mineral processing wastewater, so that the soluble heavy metal ions in the wastewater are precipitated in the form of sulfide; destabilization; then continue to add flocculant to the destabilized wastewater, stir, and carry out coagulation and precipitation reaction; after the coagulation and precipitation reaction is completed, settle naturally, and take the supernatant for copper-zinc flotation separation test.

[0029] Table 1 shows that after the precipitant sodium sulfide, coagu...

Embodiment 2

[0031] The comparison test of the flotation closed-circuit process of the direct reuse of mineral processing wastewater and the reuse of mineral processing wastewater after treatment with sodium sulfide, coagulant PAC and flocculant CH2710 was carried out. The impact of the indicators is shown in Table 2.

[0032] Table 2 Comparison of flotation closed-circuit test results

[0033]

[0034] Table 2 shows that the mineral processing wastewater is directly reused without treatment, and the copper concentrate grade, recovery rate and zinc concentrate grade and recovery rate are not as good as the mineral processing index obtained after the mineral processing wastewater is reused, indicating that the suspended solids in the mineral processing wastewater , heavy metal ions and other toxic and harmful substances do have adverse effects on the beneficiation process, and coagulation and sedimentation of wastewater by adding sodium sulfide, coagulant PAC and flocculant CH2710 can ef...

Embodiment 3

[0036] Select a copper-zinc mine in Xinjiang in July, August, and September of 2017 in the normal production stage of using fresh water, in April 2018 in the stage of direct reuse of mineral processing wastewater without treatment, in May and June of 2018 in the stage of wastewater treatment and reuse of the dressing plant And in July and August 2018, the production indicators and chemical consumption of the wastewater treatment and reuse in the normal production stage of the dressing plant are compared as follows, see Tables 3 and 4.

[0037] Table 3 Concentrator using different water beneficiation production indicators

[0038]

[0039]

[0040] Table 4 Comparison of chemical consumption in dressing plants

[0041]

[0042] Comparing the beneficiation production indicators in July, August, September 2017 and April 2018 in Table 3, it can be seen that the direct reuse of wastewater without treatment has a serious impact on the grade of copper concentrate, zinc concen...

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Abstract

The invention relates to a method for treating and recycling copper-zinc sulphide ore separation waste water. Aiming at the copper-zinc sulphide ore separation waste water, the mode of combining a vulcanization sedimentation method and a coagulating sedimentation method is adopted, that is, the waste water is fast stirring through a precipitator sodium sulphide and a flocculant PAC, then a flocculant CH2710 is added, slow stirring is carried out, after coagulating sedimentation is carried out, toxic and harmful substances in the ore separation waste water are greatly reduced, and on the contrary, the zinc concentrate recycling rate can be increased, and the zinc content in copper concentrate can be reduced. Meanwhile, consumption of part of flotation reagents can be reduced, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of beneficiation wastewater treatment and reuse, in particular to a copper-zinc sulfide ore beneficiation wastewater treatment and reuse method. Background technique [0002] The discharge of mineral processing wastewater in my country is huge. It is estimated that the annual discharge of mineral processing wastewater is about 200 million tons, accounting for 30% of the total wastewater discharged by the ferrous metal industry. The treatment rate of this part of wastewater is only 4.23%, and the rest of mineral processing wastewater is was directly expelled. The random discharge of mineral processing wastewater not only greatly harms the natural environment, but also causes a lot of waste of water resources. [0003] In recent years, the state has continuously increased environmental protection efforts, requiring tailings to be changed from wet discharge to dry discharge, so as to avoid the disadvantages of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F101/20C02F103/10
CPCC02F1/5236C02F1/56C02F2101/20C02F2103/10
Inventor 杨玮李明寅龙涛曹欢张凯
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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