Desulfurized lead-containing wastewater recycling processing method

A treatment method and waste water recycling technology, applied in the field of lead ore smelting, can solve problems such as hazardous waste and secondary pollution

Inactive Publication Date: 2012-04-25
JIESHOU CITY JUNMA IND & TRADE
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  • Abstract
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Problems solved by technology

[0002] At present, secondary lead production enterprises use lime to treat and desulfurize wastewater. The gypsum produced contains heavy metals such as lead, which is hazardous waste and will cause secondary pollution.

Method used

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Embodiment Construction

[0008] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0009] Such as figure 1 Shown, a kind of desulfurization lead-containing waste water recycling processing method, described processing method is,

[0010] First, according to the heavy metal content in the waste water, at room temperature, add a solution containing 20%--50% sodium sulfide by the weight required for the theoretical reaction to purify, stir and wait for a full reaction, then take a quantitative solution and add sodium sulfide solution dropwise to check until there is no Precipitation means that the reaction is complete, and then filter the fully reacted sodium sulfide solution, and the filtered residue is sent to the smelting process for re-smelting, and then the filtered sodium sulfide solution is slowly added to a theoretical amou...

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Abstract

The invention which discloses a desulfurized lead-containing wastewater recycling processing method relates to the technical field of lead ore smelting. The method is characterized in that the method comprises the following steps: adding a 20-50% sodium sulfide solution with the weight required by a theoretical reaction at normal temperature according to the content of heavy metals in the wastewater, stirring to fully react, taking a quantitative amount of the obtained solution, adding the sodium sulfide solution drop by drop to inspect until no deposition appears, that is, the reaction is completed, filtering out filter residues, slowly adding the filtered solution to a theoretic amount of barium hydroxide, reacting for 20-60min under stirring, and filtering to obtain barium sulfate which can be applied to the storage battery manufacturing operation and a sodium hydroxide solution which returns to a desulfurization system. According to the method of the invention, the heavy metals of lead, copper, cadmium and the like can be removed from the desulfurized lead-containing wastewater, and the wastewater is regenerated into the sodium hydroxide solution which returns to the desulphurization operation with above barium salt, so a problem of secondary pollution of traditional technologies is fundamentally and scientifically avoided, no pollutants are discharged, and energy saving and environmental protection are realized.

Description

technical field [0001] The invention relates to the technical field of lead ore smelting, in particular to a recycling treatment method for desulfurization lead-containing wastewater. Background technique [0002] At present, secondary lead production enterprises use lime to treat and desulfurize wastewater. The gypsum produced contains heavy metals such as lead, which is hazardous waste and will cause secondary pollution. Therefore, for the recycled lead industrial park, the present invention not only has obvious economic benefits, but also can embody huge social and ecological benefits. For example, Tianying National Circular Economy Industrial Zone in Jieshou City (approved as a national urban mining demonstration base in April 2011) recycles 600,000 tons of waste batteries annually, produces 30 million sets of polar plates annually, and uses more than 300 tons of daily water (Does not include domestic water), if the lead-containing wastewater produced in the process of ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/52C02F101/20C02F103/16
Inventor 张保兴
Owner JIESHOU CITY JUNMA IND & TRADE
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