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Treatment method for mineral processing wastewater of lead zinc ores

A technology for mineral processing wastewater and treatment methods, which is applied in mining wastewater treatment, energy wastewater treatment, water/sewage multi-stage treatment, etc., can solve various problems, complex water quality, and re-generation of pollutants, and achieve good results, simple operation, cost safe non-toxic effect

Inactive Publication Date: 2016-01-06
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: In view of the complex water quality of the current mineral processing wastewater, various components, containing a variety of heavy metals, mineral processing agents and other pollutants, in the traditional adsorption process, although the adsorbent can effectively treat the heavy metal wastewater, the adsorbent is regenerated. The problem that the pollutants will be re-generated, the present invention provides a treatment method for lead-zinc mine beneficiation wastewater. The present invention firstly performs pretreatment through aeration in the sedimentation tank to remove part of the impurities, and then the pretreated The lead-zinc mine beneficiation wastewater is mixed with polyferric sulfate to remove some metal impurities, and then introduced into the biological purification tank, treated through the prepared biological sludge, and finally oxidized to obtain a kind of waste that meets the national discharge standard. Treatment method of beneficiation wastewater from lead-zinc ore

Method used

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preparation example Construction

[0020] The preparation method of the biological sludge is as follows: take the river sludge and carry out natural drying, when the water content is 30-40%, put it into the fermentation tank, and add 10-15% of the river sludge to it. Vetiver, centipede grass with 20-24% of river sludge mass and Carex scutellaria with 8-17% river sludge mass, stirred evenly;

[0021] In terms of mass percentage, select 20-65 parts of agar, 5-15 parts of peptone, 15-20 parts of 10% sodium chloride solution and 20-45 parts of glucose, and stir evenly to obtain nutrition Add nutrients to the fermentation tank, the amount added is 5-8% of the river sludge mass, stir evenly, keep the temperature at 28-35°C, seal and ferment for 10-15 days, and then ventilate for 1-3 days.

example 1

[0023] Introduce lead-zinc ore dressing wastewater into the sedimentation tank, add lime milk to it according to the volume ratio of 1:3 to the wastewater, stir at a speed of 200r / min for 20min, and then use carbon dioxide to aerate it from the bottom of the sedimentation tank. 25m 3 / min, aerated for 40min, then add hydrochloric acid solution with a mass fraction of 35% to it, adjust the pH to 7.0, and filter after standing for 30min; introduce the above-mentioned filtered filtrate into the purification tank, add 100 mesh clay powder to it, add The amount is 200g / L, stir until the chroma is lower than 25 times, stop stirring, then add polyferric sulfate to it, the addition amount is 4g / t, stir evenly, and energize it to make the current amount 60mA; When the above-mentioned no precipitation occurs, stop the electric filtration, and then introduce the filtrate into the biological purification tank, lay biological sludge with a thickness of 20cm at the bottom of the biological ...

example 2

[0028] Introduce lead-zinc ore dressing wastewater into the sedimentation tank, add lime milk to it according to the volume ratio of 1:3 to the wastewater, stir at a speed of 500r / min for 30 minutes, and then use carbon dioxide to aerate it from the bottom of the sedimentation tank. 30m 3 / min, aerate for 50min, then add hydrochloric acid solution with a mass fraction of 35% to it, adjust the pH to 7.5, and filter after standing for 50min; introduce the above-mentioned filtered filtrate into the purification tank, add 120 mesh clay powder to it, add The amount is 400g / L, stir until the chroma is lower than 25 times, stop stirring, and then add polyferric sulfate to it, the addition amount is 6g / t, stir evenly, and energize it to make the current amount 80mA; When the above-mentioned no precipitation occurs, stop the electric filtration, then introduce the filtrate into the biological purification tank, lay biological sludge with a thickness of 40cm at the bottom of the biologic...

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Abstract

The invention discloses a treatment method for mineral processing wastewater of lead zinc ores, belonging to the technical field of wastewater treatment. The invention provides the treatment method for mineral processing wastewater of lead zinc ores in order to solve the problems that the current mineral processing wastewater is complex in water quality, has more components and contains various heavy metals, mineral processing reagents and other pollution substances, and pollutants can be regenerated when an adsorbent is regenerated although the heavy metal wastewater is effectively treated by using the adsorbent in the process of treating the wastewater by using the traditional adsorption method. The treatment method comprises the steps of firstly, carrying out pretreatment such as aeration in a sedimentation tank to remove parts of impurities; then, mixing the pretreated mineral processing wastewater of the lead zinc ores and polyferric sulfate to remove parts of metal impurities; next, introducing the wastewater to a biological purification tank, and treating the wastewater by using the prepared biological sludge; and finally, oxidizing and carrying out other treatment to obtain the mineral processing wastewater of the lead zinc ores, which conforms to the national discharge standard.

Description

technical field [0001] The invention discloses a method for treating lead-zinc mine beneficiation wastewater, which belongs to the technical field of wastewater treatment. Background technique [0002] The world today is facing three major problems of population, resources and the environment. The worldwide environmental crisis is making mankind face unprecedented severe challenges, such as environmental pollution, ozone layer destruction, acid rain hazards, global warming, and sharp decline in biodiversity. It threatens the development of the world economy, human health and social stability. Water resources are an irreplaceable and important resource among all kinds of resources. Water resources are closely related to the environment and human development. Due to the rapid development of modern industry, industrial water pollution has become an important cause of environmental deterioration, so the problem of water resources has become one of the important issues that have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/20C02F103/10
CPCY02W10/37
Inventor 梅庆波宋国
Owner CHINA UNIV OF MINING & TECH
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