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Beneficiation wastewater treatment method circularly used for ceramic filter

A technology of ceramic filter and beneficiation wastewater, which is applied in the directions of water/sewage multi-stage treatment, neutralized water/sewage treatment, water/sludge/sewage treatment, etc. Capillary clogging, affecting the filtering effect and other problems, to achieve the effect of reducing the amount of fresh water, good water quality, and normal filtering effect

Active Publication Date: 2009-11-18
南京银茂铅锌矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are many mines using ceramic filters at home and abroad, because ceramic filters need water with better water quality to clean and regenerate ceramic plates, and mine wastewater contains A large number of solid particles, heavy metal ions, calcium and magnesium ions, and bacterial microorganisms, directly reused in ceramic filtration will cause the capillary pores of the filter plate to be blocked and affect the filtration effect. Therefore, mines can only meet the needs of ceramic filters by consuming a large amount of fresh water every year. To varying degrees, the amount of wastewater and discharge from the concentrator has increased, wasting precious water resources

Method used

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  • Beneficiation wastewater treatment method circularly used for ceramic filter
  • Beneficiation wastewater treatment method circularly used for ceramic filter

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Based on each liter of wastewater, 10 mg of anionic flocculant PAM, 60 mg of aluminum sulfate and a certain amount of sodium carbonate were added to the above mineral processing wastewater. When the amount of sodium carbonate per liter of wastewater is 1250-1500 mg, the calcium, magnesium ions and heavy metal ions in the wastewater are greatly reduced, and the water quality is also relatively clear.

[0022] Table 1:

[0023] Na 2 CO 3 (mg / L)

Embodiment 2

[0025] Based on each liter of wastewater, add 1500mg of sodium carbonate to the above mineral processing wastewater, mix well, and let stand for 20 minutes, then add a certain amount of aluminum sulfate and 10mg of anionic flocculant PAM, mix evenly, let stand for 20 minutes After sampling and analysis, the processing results are shown in Table 2. It can be seen from Table 2 that aluminum sulfate has no effect on the removal of Ca ions and Mg ions in wastewater, but it can remove a large amount of heavy metal ions. When the amount of aluminum sulfate per liter of wastewater is 30 mg, the effect is the best, and the effluent becomes clear transparent.

[0026] Table 2:

[0027] Aluminum sulfate

Embodiment 3

[0029] Based on each liter of waste water, add 1500mg of sodium carbonate to the above mineral processing waste water, mix well and let it stand for 20 minutes, then add 30mg of aluminum sulfate and a certain amount of anionic flocculant PAM, mix well and let stand for 20 minutes Sampling analysis, processing results are shown in Table 3. It can be seen from Table 3 that the effect of flocculant PAM on Ca in wastewater 2+ , Mg 2+ , Pb 2+ , Zn 2+ Both have a certain reduction effect, mainly to accelerate the precipitation of particles that are not compatible with water, and at the same time make heavy metal ions flocculate and precipitate. The best effect is when the amount of PAM per liter of wastewater is 10mg.

[0030] Flocculant (mg / L)

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Abstract

The invention relates to a beneficiation wastewater treatment method circularly used for a ceramic filter, which comprises the following steps: evenly mixing beneficiation wastewater, and adjusting the pH value of the wastewater; adding sodium carbonate to generate sediments of calcium and magnesium ions; adding aluminum sulfate and an anionic flocculant to remove solid particles and ion sediments of heavy metals of copper, lead, zinc and the like in the wastewater through chemical coagulation reaction; adding sodium hypochlorite to kill algae and microorganisms in the wastewater; and performing concentration-precipitation, sand leach and ultrafiltration to finally obtain treatment reuse water which is clean and unblocks pores of the ceramic filter. The water obtained after the treatment of the beneficiation wastewater of a mine by using the method has good water quality, and has the effect that the pores of the ceramic filter are not calcified and blocked and the filter effect is normal after the water is reused by the ceramic filter; and the water after the treatment is applicable to ceramic filters with high water quality requirement and can be used as other production water in the mine, and is particularly applicable to mines using the ceramic filters. The method has obvious effect of achieving wastewater complete utilization and zero discharge and reducing fresh water consumption for concentration plants.

Description

technical field [0001] The invention relates to a method for treating and reusing mine ore dressing wastewater, in particular to a method for treating ore dressing wastewater that can be recycled for a ceramic filter. Background technique [0002] At present, there are many mines using ceramic filters at home and abroad. Because ceramic filters need water with good water quality to clean and regenerate ceramic plates, and mine wastewater contains a large amount of solid particles, heavy metal ions, calcium and magnesium ions and bacterial microorganisms. Directly reusing it for ceramic filtration will cause the capillary pores of the filter plate to be blocked, which will affect the filtration effect. Therefore, the mine has to consume a large amount of fresh water every year to meet the needs of the ceramic filter, which increases the amount of wastewater and discharge of the concentrator to varying degrees. Waste precious water resources. Contents of the invention [00...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/66C02F1/52C02F1/50
Inventor 缪建成孙水裕宋卫锋马斌刘亚龙汤成龙董宗良周长银
Owner 南京银茂铅锌矿业有限公司
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