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Method for treating antimony ore beneficiation wastewater with modified coal ash

A technology for mineral processing wastewater and fly ash, which is applied in the fields of solid waste removal, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of no patented technology and unseen mineral processing wastewater, and achieve simple equipment and improved The effect of environmental quality and low cost

Inactive Publication Date: 2010-10-27
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no reports of using fly ash to treat mineral processing wastewater, and there is no related patented technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0018] Take fly ash, a by-product of coal combustion in a thermal power plant, as raw material, acidify the fly ash with 1mol / L sulfuric acid, then heat it to 300°C for a period of time, cool and dry it for later use.

[0019] The concentration of antimony discharged from the tailings dam of an antimony mining area in Hunan Province is 28.611mg L -1 At room temperature, adjust the pH of the wastewater to 3, directly add 0.5 g of acidic modified fly ash, stir evenly and let it stand for 3 hours, take the supernatant, and measure the concentration of Sb and butyl xanthate. The result is: the remaining concentration of antimony is 0.0274mg·L -1 , the removal rate is 99.025%, and it has reached the discharge standard of tin, antimony and mercury industrial pollutants proposed by the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China in 2008 (draft for comments); the remaining conce...

Embodiment example 2

[0021] Take fly ash, a by-product of coal combustion in a thermal power plant, as raw material, acidify the fly ash with 1mol / L sulfuric acid, then heat it to 300°C for a period of time, cool and dry it for later use.

[0022] The concentration of antimony discharged from the tailings dam of an antimony mining area in Hunan Province is 28.611mg L -1 The beneficiation wastewater was 100mL, the pH of the wastewater was adjusted to 3, and 1.5g of acidic modified fly ash was directly added, stirred evenly and allowed to stand for 3h, and the supernatant was taken to measure the concentration of Sb and butyl xanthate. The result is: the remaining concentration of antimony is 0.0015mg·L -1 , the removal rate is 99.99%, and the result is lower than the standard limit of 0.005mg L for antimony in centralized drinking water and surface water sources in the national standard surface water environmental quality standard (GB3838-2002) -1 ; The remaining concentration of butyl xanthate is...

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PUM

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Abstract

The invention discloses a method for treating wastewater from antimony ore dressing with modified fly ash, which comprises the following steps of: firstly, modifying the fly ash, namely, the fly ash is first acidified, then heated and finally cooled and dried for later use; secondly, adjusting the pH value of the wastewater from antimony ore dressing; and finally, stirring the wastewater from antimony ore dressing at a dosage of 0.5 to 2 grams of fly ash per 100 milliliters of wastewater, allowing the wastewater to stand, and discharging the wastewater passing tests. The method carries out the absorption treatment of the wastewater from antimony ore dressing by using waste, solves the problem that the antimony content and the sodium n-butyl-xanthate content of the wastewater from antimonyore dressing far exceed standards, can remove more than 99 percent of antimony from the wastewater from antimony ore dressing and reduce the concentration of antimony in treated water to less than 0.3mg / L, and can remove more than 95 percent of sodium n-butyl-xanthate and reduce the concentration of the sodium n-butyl-xanthate in the treated water to less than 0.02 mg / L, thereby realizing up-to-standard discharge and improving environmental quality. The method has the advantages of low cost and simple equipment and operation and is applicable to antimony ore dressing plants.

Description

technical field [0001] The present invention relates to the treatment of waste water or sewage, and furthermore, relates to a method for treating waste water by using an adsorption method, and specifically, relates to a method for treating mineral processing waste water with fly ash. Background technique [0002] As we all know, antimony ore is mainly beneficiated by flotation, and each ton of ore needs about 5 tons of water. The discharged mineral processing wastewater often contains more low-grade antimony ore powders and higher concentrations of soluble antimony salts. If left untreated, more and more antimony will pollute the environment and cause harm to human health: a large amount of antimony inhaled into the body will irritate the respiratory tract, esophageal mucous membrane and skin, leading to pulmonary edema, hepatomegaly, and even cancer . Some animal experiments also confirmed the toxicity of antimony. Therefore, antimony is listed as a priority pollutant by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F101/20C02F101/30B09B3/00C02F1/28
Inventor 吴丰昌朱静
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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