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Treatment method capable of achieving stabilization and curing of electroplating sludge

A technology of electroplating sludge and treatment methods, which is applied in the direction of sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., and can solve problems such as random stacking, environmental pollution, and many factories

Inactive Publication Date: 2012-06-27
YANCHENG INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

At present, due to many problems in my country's electroplating industry, such as many factories, small scale, low level of equipment and low level of pollution control, most of the electroplating sludge is still simply landfilled or even piled up randomly, causing serious pollution to the environment.

Method used

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Embodiment Construction

[0007] The present invention is achieved like this: a kind of treatment method that realizes the stabilization of electroplating sludge, immobilization, this method comprises the steps of following order:

[0008] ①Under the temperature condition of 105°C, after the electroplating sludge is dehydrated and dried, it is ground and crushed and passed through a 60-mesh sieve for later use;

[0009] ②In the temperature range of 25-50°C, mix the following components by weight percentage: 30-55% of electroplating sludge, 40-60% of curing agent, and 5-10% of stabilizer. After adding water in a proportion of 10-20% of the total mixture, stir vigorously in the mixer for 1.5-2 hours;

[0010] ③The above mixture is molded and solidified into blocks;

[0011] ④ Block maintenance and air drying

[0012] The stabilizer used in the above step ② is a biochar stabilizer. The biochar stabilizer is a high-temperature pyrolysis product of corn stalks and reeds at 400-500°C in the absence of oxy...

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Abstract

The invention relates to a treatment method capable of achieving stabilization and curing of electroplating sludge, which belongs to the technical field of environmental engineering. The treatment method comprises the following steps of (1) dewatering and drying the electroplating sludge at the temperature of 105 DEG C, grinding, crushing and screening the electroplating sludge for standby application; (2) mixing the electroplating sludge, stabilizer and curing agents according to a certain weight percentage at the temperature within a range of 25-50 DEG C, adding water with a certain proportion into the mixture, and strongly blending the mixture through a blender; (3) moulding the mixture and curing the mixture into building blocks; and (4) conserving and drying the building blocks through air. A toxic leaching test is carried out on a building block sample according to GB 5085.3 2007, the building block sample accords with state environmental protection requirements, and physical properties of the building block sample accord with national building materials secondary standards.

Description

Technical field: [0001] The invention belongs to the technical field of environmental protection engineering. Background technique: [0002] Electroplating sludge is the discharge produced in the process of electroplating wastewater treatment, which contains a large amount of toxic heavy metals such as chromium, cadmium, nickel, zinc, etc., and its composition is very complex, which belongs to hazardous solid waste. At present, due to many problems in my country's electroplating industry, such as many factories, small scale, low level of equipment and low level of pollution control, most of the electroplating sludge is still simply landfilled or even piled up randomly, causing serious pollution to the environment. . Therefore, how to adopt effective technology to treat and dispose of electroplating sludge, and realize its stabilization, harmlessness and resource utilization have always been the focus of research at home and abroad. [0003] Among the many treatment methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/00C04B28/04C02F11/00
Inventor 严金龙全桂香丁成
Owner YANCHENG INST OF TECH
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