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Electroplating sludge treatment method and device

A treatment method and technology for electroplating sludge, applied in chemical instruments and methods, phosphorus oxyacid, solid separation, etc., can solve the problems of low energy consumption, electroplating sludge pollution, short process flow, etc., and achieve low energy consumption, Solve the effect of descaling and effective separation

Active Publication Date: 2020-10-13
宝武集团环境资源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects existing in the prior art, the object of the present invention is to provide a treatment method and device for electroplating sludge, which utilizes a rotary hearth furnace to co-process electroplating sludge, which not only solves the pollution problem of electroplating sludge, but also realizes the cleanliness of electroplating sludge. Resource utilization, short technological process, low energy consumption, environmental friendliness and remarkable economic and environmental benefits

Method used

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  • Electroplating sludge treatment method and device
  • Electroplating sludge treatment method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0067] The electroplating sludge with a TFe content of 32.98%, a Zn content of 3%, a P content of 3.8%, and a water content of 53% and the reducing agent semi-coke were fully stirred in the slurry tank according to the ratio of 100:28 to obtain a slurry, semi-coke The particle size is 0.074mm-0.1mm, and the fixed carbon accounts for 80-85% of the total mass of semi-coke;

[0068] The slurry is filtered through a filter press to obtain a filter cake with a water content of 15.22%;

[0069] The filter cake enters the rotary hearth furnace through the feeding system, passes through the water volatilization area and the reduction magnetic selection area in turn, and after being discharged from the cooling discharge area, the magnetic separation filter cake and zinc oxide dust are obtained; the time for one revolution of the rotary hearth furnace is 55min, the filter cake stays in the feed zone for 1min; stays in the moisture volatilization zone for 10min, the O in the moisture vol...

Embodiment 2

[0073] The electroplating sludge with a TFe content of 31.56%, a Zn content of 3.6%, a P content of 4.2%, and a water content of 55.18% and the reducing agent semi-coke were fully stirred in the slurry tank according to the ratio of 100:30 to obtain a slurry, semi-coke The particle size is 0.074mm-0.1mm, and the fixed carbon accounts for 80-85% of the total mass of semi-coke;

[0074] The slurry is filtered through a filter press to obtain a filter cake with a water content of 13.12%;

[0075] The filter cake enters the rotary hearth furnace through the feeding system, passes through the water volatilization area and the reduction magnetic selection area in turn, and after being discharged from the cooling discharge area, the magnetic separation filter cake and zinc oxide dust are obtained; the time for one revolution of the rotary hearth furnace is 60min, the filter cake stays in the feed zone for 1min; stays in the moisture volatilization zone for 10min, the O 2 The concent...

Embodiment 3

[0079] The electroplating sludge with a TFe content of 33.55%, a Zn content of 3.7%, a P content of 5.23%, and a water content of 57.34% and the reducing agent semi-coke were fully stirred in the slurry tank according to the ratio of 100:30 to obtain a slurry, semi-coke The particle size is 0.074mm-0.1mm, and the fixed carbon accounts for 80-85% of the total mass of semi-coke;

[0080] The slurry is filtered through a filter press to obtain a filter cake with a water content of 15.22%;

[0081] The filter cake enters the rotary hearth furnace through the feeding system, passes through the water volatilization area and the reduction magnetic selection area in turn, and after being discharged from the cooling discharge area, the magnetic separation filter cake and zinc oxide dust are obtained; the time for one revolution of the rotary hearth furnace is 65min, the filter cake stays in the feed area for 2min; stays in the moisture volatilization zone for 12min, the O in the moistu...

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Abstract

The invention discloses an electroplating sludge treatment method and device. The treatment method comprises the following steps that firstly, a reducing agent is added into electroplating sludge andstirred, and then pulp is obtained; secondly, a filter cake is obtained by carrying out filter pressing on the pulp; thirdly, the filter cake is delivered into a rotary hearth furnace from a feeding area, passes through a moisture volatilizing area and a reduction magnetic separation area of the rotary hearth furnace and is discharged from a cooling discharging area, and then a magnetic separationfilter cake and zinc oxide powder are obtained; and fourthly, the magnetic separation filter cake is ground and then delivered into a magnetic separation system for magnetic separation, and magnetiteconcentrate and tails are obtained. According to the treatment method, the rotary hearth furnace is used for cooperatively treating the electroplating sludge, the problem of pollution of the electroplating sludge is solved, and resource utilization of the electroplating sludge is achieved; and besides, the technological process is short, energy consumption is low, environment protection is achieved, and the economical benefits and environment protection benefits are remarkable.

Description

technical field [0001] The invention relates to a technology for treating electroplating sludge in the field of metallurgy, in particular to a treatment method and device for electroplating sludge. Background technique [0002] Electroplating sludge mainly comes from the solid waste produced by various electroplating waste liquids and electrolytic baths through liquid-phase chemical treatment in the electroplating process. Due to the different production processes and treatment processes of various electroplating manufacturers, the chemical components of electroplating sludge are also different. There will be some differences, but in general, electroplating sludge mainly includes heavy metal compounds such as chromium, iron, nickel, copper, zinc, and soluble salts, especially chromium-containing compounds, which belong to the national first-class hazardous waste. There was no professional technology and special equipment at the time, resulting in incomplete treatment, large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B5/10C22B19/00C01B25/26B03C1/02
CPCC22B1/02C22B5/10C22B19/00C01B25/26B03C1/02Y02P10/20
Inventor 吴佩佩刘晓轩刘安治曹志成彭程刘长正李生忠崔慧君
Owner 宝武集团环境资源科技有限公司
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