Process and equipment for treating and reusing waste water from lead-zinc ore beneficiation

A mineral processing wastewater and treatment process technology, applied in mining wastewater treatment, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc., can solve the problem that lead-zinc sulfide mineral processing wastewater is rarely used, and it is impossible to remove organic matter in lead-zinc wastewater, Difficulty in reusing lead-zinc beneficiation wastewater and other issues to achieve the effect of eliminating negative impacts, strengthening biological treatment effects, and solving environmental risks

Active Publication Date: 2021-08-06
广东中金岭南环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is rarely used in the treatment of lead-zinc sulfide beneficiation wastewater
The difficulty in the reuse of lead-zinc beneficiation wastewater is that there are heterocyclic organic substances with good foaming properties in the wastewater, and these organic substances are difficult to separate and eliminate. It is impossible to completely remove the lead-zinc wastewater from the lead-zinc wastewater by single advanced oxidation treatment and biochemical treatment. The organic matter makes the foaming of the effluent still strong, thus affecting the beneficiation index

Method used

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  • Process and equipment for treating and reusing waste water from lead-zinc ore beneficiation
  • Process and equipment for treating and reusing waste water from lead-zinc ore beneficiation
  • Process and equipment for treating and reusing waste water from lead-zinc ore beneficiation

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Effect test

Embodiment 1

[0050] The mineral processing wastewater of a large-scale lead-zinc mine in northern Guangdong is selected. The sources of wastewater are divided into three sources: lead-zinc mineral processing wastewater (including concentrate overflow), sulfur concentrate overflow water, and sulfur tail water (including trench water). The wastewater ratio is 70% :14:16, see Table 1 for wastewater quality analysis, the test water volume is 60L / d, and the operation mode is continuous operation.

[0051] Table 1 Analysis of wastewater quality (mg / L, except pH)

[0052] pH Ca Fe Cu Zn Pb CODcr NH 3 -N

TP SS 12.3 820 3.85 2.04 0.85 1.73 418 23.4 1.50 371

[0053] The technical process of the embodiment of the present invention 1 can be specifically expressed as follows:

[0054] 1) After the wastewater is collected and treated by primary sedimentation, it undergoes two-stage ozone oxidation to eliminate the reducing substances in the mineral proc...

Embodiment 2

[0070] The beneficiation wastewater of a large-scale lead-zinc mine in Tieling area, Liaoning Province was selected. The source of the wastewater is lead-zinc beneficiation wastewater. The water quality analysis of the wastewater is shown in Table 4. The test water volume is 60L / d, and the operation mode is continuous operation.

[0071] Table 4 Waste water quality analysis (mg / L, except pH)

[0072] pH Ca Fe Cu Zn Pb CODcr NH 3 -N

TP SS 11.4 460 0.55 1.02 1.20 0.85 368 50.1 0.88 519

[0073] See Table 5 for the effluent water quality after the reaction according to this technological process and the comparative 1 and comparative 2 processes.

[0074] Table 5 Analysis of effluent water quality (mg / L, except pH)

[0075] out of water pH Ca Fe Cu Zn Pb CODcr NH3-N TP SS This craft 7.05 317 0.52 0.68 0.44 0.71 28.5 25.3 0.31 31.6 Contrast 1 6.12 385 0.43 0.79 0.65 0.49 44.1 ...

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Abstract

The invention discloses a process method and equipment for the treatment and reuse of lead-zinc mine beneficiation wastewater. The present invention is a typical reuse treatment process for lead-zinc beneficiation wastewater, and its process flow is: oxidation of reducing substances in beneficiation wastewater and destruction of refractory organic matter - stirring aeration - adjusting alkalinity - adding bacteria and N, P - anaerobic filter - aerobic filter - effluent. Aiming at the characteristics that foaming organic matter in waste water is difficult to degrade, the invention uses anatase-scandium metal to catalyze ozone oxidation to change the material structure, oxidize part of its carbon ends to hydroxyl, and strengthen waste water through anaerobic and aerobic biological filters Biological treatment effect, reduce effluent COD. It can solve the current problem of strong foaming after the treatment of lead-zinc beneficiation wastewater, realize the purpose of not changing the fixed beneficiation agent system, using the treated water for beneficiation, and not affecting the beneficiation index.

Description

technical field [0001] The invention relates to the recycling of mineral processing wastewater, in particular to a process method for processing and recycling typical lead-zinc ore mineral processing wastewater. Background technique [0002] The beneficiation process of lead-zinc ore mainly includes grinding and grading, flotation beneficiation, concentrate concentration and filtration, etc., and the processing of each ton of ore generally requires 4 to 6 m of water. 3 , Excluding the amount of recycled water, most of the water is discharged to the tailings pond along with the tailings in the form of tailings slurry, stays in the tailings pond for a certain period of time, and is discharged after natural degradation. Due to the organic flotation agents such as xanthate and black medicine added in the mineral processing process, heavy metal salt inhibitory activators such as zinc sulfate and copper sulfate, polymer organic foaming agents such as No. 2 oil, and mineral pulp su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/30C02F103/10
CPCC02F1/001C02F1/78C02F3/30C02F9/00C02F2001/007C02F2101/30C02F2103/10
Inventor 陈涛晏波
Owner 广东中金岭南环保工程有限公司
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