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A combined treatment method for beneficiation wastewater containing xanthate residues

A technology of mineral processing wastewater and combined treatment, which is applied in the direction of mining wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc. It can solve the problems of incomplete treatment, complicated treatment process, and return of no liquid to tailings obtained from mineral processing, etc.

Active Publication Date: 2020-09-29
CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method has the disadvantages of incomplete treatment in practical application, easy to cause secondary pollution to the environment, complicated treatment process, and high cost.
[0004] So far, there is no relevant record of using alum slurry as raw material combined with biological method to treat mineral processing wastewater containing xanthate residues, and there is no related technical report about returning the liquid treated by biological method to the tailings obtained from mineral processing

Method used

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  • A combined treatment method for beneficiation wastewater containing xanthate residues
  • A combined treatment method for beneficiation wastewater containing xanthate residues
  • A combined treatment method for beneficiation wastewater containing xanthate residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The mineral processing wastewater containing xanthate residues from a copper ore dressing plant in Kunming City, Yunnan Province was taken, and the concentration of residual xanthate in the wastewater was 50 mg L -1 , wastewater pH=9.3, mineral fine mud content, particle size and particle size distribution in wastewater: 1.5%, -400 mesh 97%.

[0045] The processing method is as follows:

[0046] (1) Preparation of modified alum slurry: crush the alum slurry and pass it through a 200-mesh sieve, take the sieved material and 0.5mol / L sulfuric acid solution and mix evenly at a solid-liquid mass ratio of 1:2, heat to 75°C, Insulated for 2 hours to obtain the sulfuric acid treatment mixture of the alum slurry. Then add an appropriate amount of lime to the sulfuric acid treatment mixture of the alum slurry to adjust the pH to 4.5, and cool to 25°C, age for 1.0h and then filter to obtain a semi-solid to solid modified alum slurry;

[0047] The median particle size of the mod...

Embodiment 2

[0063] Take the mineral processing wastewater containing xanthate residues from a lead-zinc ore dressing plant in Luoyang City, Henan Province. The concentration of residual xanthate in the wastewater is 165 mg L -1 , wastewater pH=8.0, mineral fine mud content, particle size and particle size distribution in wastewater: 0.1%, -400 mesh 95%.

[0064] The processing method is as follows:

[0065] (1) Preparation of modified alum slurry: crush the alum slurry and pass it through a 200-mesh sieve, take the sieved material and 1mol / L sulfuric acid solution and mix evenly at a solid-liquid mass ratio of 1:3, heat to 85°C, and keep warm 3h, the sulfuric acid treatment mixed solution of the alum slurry was obtained. Next, add an appropriate amount of limestone to the sulfuric acid-treated mixed solution of the alum slurry to adjust the pH to 5.0, cool to 30° C., and centrifuge after aging for 1.5 hours to obtain a semi-solid to solid modified alum slurry;

[0066] The median partic...

Embodiment 3

[0082] The mineral processing wastewater containing xanthate residues from a copper ore dressing plant in Baoding City, Hebei Province, the concentration of residual xanthate in the wastewater was 233mg L -1 , Wastewater pH=11.0. The mineral fine mud content, particle size and particle size distribution in the mineral processing wastewater containing xanthate residues are: 3.7%, -400 mesh 98%.

[0083] The processing method is as follows:

[0084] (1) Preparation of alum slurry additives: crush the alum slurry and pass it through a 200-mesh sieve, take the sieved material and 1.5mol / L sulfuric acid solution and mix evenly at a solid-liquid mass ratio of 1:4, heat to 85°C, Insulated for 3 hours to obtain the sulfuric acid treatment mixture of the alum slurry. Then add an appropriate amount of dolomite and calcium carbide slag to the sulfuric acid treatment mixture of the alum slurry to adjust the pH to 5.5, and cool it to 35°C, and centrifuge after aging for 2 hours to obtain...

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Abstract

The invention relates to the field of sewage treatment and particularly relates to a combined processing method for xanthate residue-containing beneficiation wastewater. The method comprises: firstly, adding modified alum plasma into the wastewater, and after stirring, obtaining a primary processed solution; then according to 3% to 10% of a volume of the primary processed solution, preparing a bacterial culture solution containing pseudomonas aeruginosa; adding the prepared bacterial culture solution containing the pseudomonas aeruginosa into the primary processed solution, and under the stirring aeration condition, processing for at least 10 hours to obtain beneficiation wastewater subjected to bacterial processing; next, introducing the obtained beneficiation wastewater subjected to bacterial processing into a tailings reservoir to carry out natural purification for at least 3d, so that the xanthate residue-containing beneficiation wastewater can reach the discharge standard or the recycling standard. The combined processing method is short in flow, high in efficiency and low in cost, cannot generate secondary pollution, has excellent economic benefits and is convenient for large-scale application.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a combined treatment method for beneficiation wastewater containing xanthate residues. Background technique [0002] Xanthate, also known as xanthate, is the most commonly used collector in the flotation production of pyrite and non-ferrous metal ores. After flotation, a large amount of beneficiation wastewater containing xanthate residues will be produced. Residues of xanthate make the COD of the wastewater from the concentrator exceed the standard, and xanthate can form water-insoluble chelates with some heavy metal ions, which is easy to cause heavy metal enrichment, is generally poisonous to aquatic organisms, and has teratogenicity. Xanthate has a foul smell, even if the remaining amount is very small, it can make the water smell bad and seriously affect the ecological balance of the nearby waters. In addition, beneficiation wastewater usually contains mineral fine mud with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/10
CPCC02F1/281C02F1/5236C02F3/34C02F2103/10
Inventor 王丽唐鸿鹄纪斌孙伟胡岳华张烨刘润清
Owner CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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