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Integrative recovering and reusing of heavy metals in wire board plating wastewater treatment sludge

A technology for electroplating wastewater and circuit boards, which is used in energy wastewater treatment, metallurgical wastewater treatment, water/sludge/sewage treatment, etc.

Inactive Publication Date: 2007-09-19
苏州市环境工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a method for comprehensive recycling of heavy metals in circuit board electroplating wastewater treatment sludge. Environmental pollution, saving heavy metal resources

Method used

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  • Integrative recovering and reusing of heavy metals in wire board plating wastewater treatment sludge
  • Integrative recovering and reusing of heavy metals in wire board plating wastewater treatment sludge
  • Integrative recovering and reusing of heavy metals in wire board plating wastewater treatment sludge

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Embodiment

[0046] Embodiment: A kind of comprehensive recycling method of heavy metals in the circuit board electroplating wastewater treatment sludge, using the sludge produced by the circuit board electroplating wastewater treatment as raw material, comprises the following steps in turn:

[0047] (1), recovery gold

[0048] Gold is one of the earliest metals recognized and used by humans, and it is also a symbol of wealth that humans have been pursuing for thousands of years. With the weakening of the currency function and decorative function of gold, the industrial use of gold has become one of the main functions of gold. Electronic sludge contains gold. According to experimental analysis, its content is 10-200 mg / kg. When the content reaches 50 mg / kg or more, it can be recycled. With the development of industry, the demand for gold is also increasing. Making full use of the "secondary mineral" resources of precious metals in these sludges is of great significance to the realization ...

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Abstract

The invention relates to a method of recovering gold and copper heavy metal from the sludge generated from plating waste water by dealing with circuit board and of producing waste water treating-agent. The method is provided with steps of: absorbing the gold in solution by active carbon; deoxidizing gold by zineum; substituting the scrap iron by the copper in filtrate; further treating the residual irons solution to get a good waste water treating-agent. The pureness of the achieved gold and copper is above 98%. The waste water treating-agent is used for treating printing and dyeing waste water and has an obvious decolorizing effects and a high COD removal rate. The invention invests few, takes effects quickly, wins more, handles simply, is with a percent products recovery and a good quality.

Description

technical field [0001] The invention relates to a comprehensive recycling method for heavy metals in industrial sludge, in particular to a method for recovering gold and copper heavy metals from sludge produced by treating circuit board electroplating wastewater and preparing wastewater treatment agents. Background technique [0002] Comprehensive utilization is one of the most important means to realize solid waste recycling and reduction. The Chinese government has always attached great importance to the comprehensive utilization of solid waste. According to statistics, the comprehensive utilization rate of industrial solid waste in my country has reached 78.67%. However, judging from the status quo of comprehensive utilization technologies, most of them remain at a lower level as fuel, road construction, backfill, and production of building materials, lacking value-added and deep-processed products, and the comprehensive utilization of waste with a wide range of issues is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F1/52C22B11/00C22B15/00C02F101/20C02F103/16
CPCY02P10/20Y02W10/37
Inventor 李金荣陈土根章文华郁宏
Owner 苏州市环境工程有限责任公司
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