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Method for realizing resource recovery of electroplating sludge

A technology for electroplating sludge and recycling, applied in the fields of chemistry and resources and environment, can solve problems such as secondary pollution, and achieve the effects of low investment and operating costs, high economic and environmental benefits, and simple process

Inactive Publication Date: 2009-12-23
OCEAN UNIV OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

At present, the treatment methods of electroplating sludge mainly focus on harmless treatment, including stacking, landfill, incineration, reclamation, etc., but these treatment methods are easy to cause secondary pollution due to improper treatment

Method used

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  • Method for realizing resource recovery of electroplating sludge
  • Method for realizing resource recovery of electroplating sludge
  • Method for realizing resource recovery of electroplating sludge

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Embodiment Construction

[0012] Combine below figure 1 The present invention is further described with embodiment, and purpose is to investigate the processing effect of the inventive method to actual electroplating sludge, and concrete implementation steps are as follows:

[0013] 1. Take 80g of dry electroplating sludge (1) in the acid leaching reactor (2), add 400mL of sulfuric acid with a concentration of 10%, shake and pickle for half an hour at room temperature, filter to obtain the acid leaching solution (5) and acid leaching residue (4). The pickling slag (4) is solidified, and the pickling solution (5) is added to the electrolytic cell (6).

[0014] 2. In the electrolytic cell (6), a stainless steel cathode and a titanium-coated ruthenium-iridium anode are selected, and the cell voltage is selected to be 2.7V to obtain electrolytic copper (7).

[0015] 3. The acid leaching solution (8) after copper removal was adjusted to pH 1.6 with sodium hydroxide in the precipitation reactor (9), and th...

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Abstract

The invention relates to a treatment method for realizing resource recovery of electroplating sludge, which comprises the following steps: firstly, valuable metals in electroplating sludge are leached out by acid at normal temperature; secondly, filtered acid immersion liquid is poured into a copper electrolytic bath to recover and obtain electrolytic copper; thirdly, ferrum and chromium in copper acid immersion liquid are removed by ammonium jarosite through sedimentation, and iron-chromium residue and acid immersion liquid containing nickel are separated through filtration; and finally, the acid immersion liquid containing nickel is poured into an electrolytic bath of nickel to recover part of electrolytic nickel, and the rest nickel vitriol solution is taken as material for plating solution to be reused by a plating workshop. The method adopts a step-processing technique of acid dipping, electrolysis, sedimentation and electrolysis, so that electrolytic copper with high purity, iron-chromium residue and electrolytic nickel can be obtained. In addition, the method has simple process, low investment and operation cost, and higher economic benefit and environmental benefit.

Description

technical field [0001] The invention relates to a method for recycling electroplating sludge, which belongs to the fields of chemistry, resources and environment. Background technique [0002] A large amount of electroplating sludge produced after electroplating wastewater is treated by chemical precipitation belongs to industrial hazardous waste. At present, the treatment methods of electroplating sludge mainly focus on harmless treatment, including stacking, landfill, incineration, reclamation, etc., but these treatment methods are easy to cause secondary pollution due to improper treatment. Electroplating sludge contains a large amount of heavy metals such as copper, nickel, chromium, iron, etc. It is a potential renewable resource. If it can be recycled, it will not only solve the problem of environmental pollution, but also obtain considerable economic benefits. To a certain extent, solve the problem of resource shortage. Contents of the invention [0003] Aiming at...

Claims

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Application Information

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IPC IPC(8): C25D21/16
Inventor 彭昌盛李盼盼
Owner OCEAN UNIV OF CHINA
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