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Processing method for generating highly copper containing sewage sludge with copper containing wastewater or waste liquor

A treatment method and technology for copper sludge, applied in the field of treatment of copper-containing wastewater or copper-containing waste liquid to produce high copper-containing sludge, can solve problems such as expensive treatment costs and no recycling value.

Inactive Publication Date: 2008-10-29
UNITECH PRINTED CIRCUIT BOARD CORP
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Problems solved by technology

[0006] Such a treatment method is mainly to separate out the copper ions in the waste liquid to form solid copper hydroxide sludge (Cu(OH) 2 ), but the copper content is only 7-15%. This method not only has no recovery value, but also needs to pay expensive treatment costs

Method used

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  • Processing method for generating highly copper containing sewage sludge with copper containing wastewater or waste liquor
  • Processing method for generating highly copper containing sewage sludge with copper containing wastewater or waste liquor
  • Processing method for generating highly copper containing sewage sludge with copper containing wastewater or waste liquor

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Embodiment approach

[0024] Please refer to shown in Fig. 3, as steps S01~S03, it is the second kind of embodiment of the present invention, and it is mainly the copper hydroxide sludge (as shown in step S01) that the step S01 reaction of the first kind of embodiment is generated ) after mixing with oxidizing acidic high-concentration copper-containing waste liquid, and adjusting the pH value to PH0.5-2.0 (as shown in step S02); then mixing with strong alkali (such as sodium hydroxide) , and adjust the pH value to more than PH10 to react to form copper oxide (CuO) sludge (shown in step S03);

[0025] Please refer to shown in Fig. 4, it is the third kind of embodiment of the present invention, and this method is after the copper-containing waste liquid with high concentration of oxidative acidity is mixed with strong base (such as sodium hydroxide), and the pH value Adjust to react above PH10 to form copper oxide (CuO) sludge;

[0026] Please refer to Figure 5, which is the fourth embodiment of th...

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Abstract

The invention provides a processing method for producing high copper sludge from copper-containing wastewater or waste cupric liquor, which includes the following steps: the invention mainly recycles and treats the copper-containing wastewater or waste cupric liquor which is produced after a printed circuit board is made, so as to precipitate copper sludge with higher copper content; the copper-containing wastewater or waste cupric liquor which is produced after a printed circuit board is made is firstly classified into acid copper-containing wastewater with low concentration, acid copper cupric liquor with high concentration and copper cupric liquor with oxidizability and high concentration and then is mixed and react with strong base to generate copper oxide sludge and then water is removed from the copper oxide sludge by a dehydration / drying device, so as to obtain the copper sludge with higher copper content. The method can transform cupric hydroxide to copper oxide without adding other transforming agents and can convert the low copper sludge in valueless copper-containing wastewater or waste cupric liquor into high copper sludge with recovery value.

Description

technical field [0001] The invention provides a treatment method for high copper-containing sludge produced by copper-containing wastewater (liquid), especially a method for classifying copper-containing wastewater or copper-containing waste liquid after making printed circuit boards into acidic low-concentration copper-containing wastewater , high-acidity and high-concentration copper-containing waste liquid with oxidative acidity, and mix it with strong alkali to increase the copper content in copper sludge, thereby increasing the economic value of recovery. Background technique [0002] With the development and popularization of electronic information products, the output value of circuit boards has exceeded hundreds of billions of yuan. The chemicals and special raw materials used in its manufacturing process make wastewater, waste liquid and waste not only contain a variety of organic pollutants, but also It also contains a large amount of toxic heavy metals such as cop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C01G3/02
Inventor 传政豪
Owner UNITECH PRINTED CIRCUIT BOARD CORP
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