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Method for recycling lead in lead-containing waste water

A wastewater and lead oxide technology, applied in metallurgical wastewater treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of resource waste, pollution, damage to human and other biological health, etc., to avoid resource waste and purify wastewater. Effect

Inactive Publication Date: 2016-03-23
永兴县灿阳贵金属有限责任公司
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  • Claims
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Problems solved by technology

[0002] During the heavy metal smelting process, a large amount of wastewater containing heavy metals will be produced, and the direct discharge of wastewater will cause irreversible pollution to the environment, and will also cause serious health damage to humans and other organisms, and lead is a common heavy metal in wastewater. Discharge between them will cause serious pollution and waste of resources

Method used

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the examples, but not limited to the examples.

[0016] The method for waste water recovery lead of the present invention, its steps are:

[0017] (1) wastewater acidification treatment, the wastewater is divided into multiple acidification pools with the same volume, and nitric acid solution is added to make the pH value in the wastewater between 5.5 and 6;

[0018] (2) Precipitation solution is configured, and the concentration of configuration is a sodium hydroxide solution of 500g / L;

[0019] (3) Calculation of the proportion of sedimentation, adding the sodium hydroxide solution configured in step (2) to the acidic wastewater in step (1), so that the pH value after mixing is between 9.2 and 9.5, and calculates each acidification The volume of sodium hydroxide solution that needs to add in the pond;

[0020] (4) Precipitation treatment, according to the acidification pond in the proportionin...

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PUM

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Abstract

The invention discloses a method for recycling lead in lead-containing waste water. The method comprises the following steps: (1) performing waste water acidizing treatment and causing the pH of the waste water to be between 5.5 and 6; (2) preparing precipitation solution, and preparing sodium hydroxide solution with a concentration of 500 g / L; (3) calculating precipitation capacity ratio; (4) performing precipitation treatment, and performing batch precipitation treatment of acidification pools according to the ratio calculated in the step (3); (5) taking out precipitation; (6) drying the precipitation; (7) performing calcination treatment to decompose lead hydroxide, and obtaining lead oxide; (8) performing reduction treatment, performing reduction treatment on lead oxide in the step (7), and heating charcoal in lead oxide to obtain metal lead through reduction. The recycling method is simple and good in effect.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for recovering lead from waste water containing lead. Background technique [0002] During the heavy metal smelting process, a large amount of wastewater containing heavy metals will be produced, and the direct discharge of wastewater will cause irreversible pollution to the environment, and will also cause serious health damage to humans and other organisms, and lead is a common heavy metal in wastewater. Discharge between them will cause very serious pollution and waste of resources. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of the prior art and provide a method for recovering lead from lead-containing wastewater. A method for reclaiming lead in lead-containing wastewater, the steps of which are: [0004] (1) wastewater acidification treatment, the wastewater is divided into multiple ac...

Claims

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Application Information

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IPC IPC(8): C02F9/04C22B13/02C22B7/00C02F103/16
CPCC02F1/5236C02F1/66C02F9/00C02F2103/16C22B13/025Y02P10/20
Inventor 李灿李万顺李世林
Owner 永兴县灿阳贵金属有限责任公司
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