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Method for recycling metals in sludge from wire rope production

A steel wire rope and recycling technology, applied in the field of environmental engineering, can solve problems such as high cost, secondary pollution, complex components, etc., and achieve the effect of reducing the processing burden

Active Publication Date: 2017-08-29
江苏荣信环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The sludge and waste acid from steel wire rope enterprises contain heavy metals (iron, zinc, lead, etc.), oxides and salts. The composition is quite complex. Some people use resin adsorption to treat them, but the cost is too high for enterprises to accept.
Using the alkali neutralization method, the obtained mixed slag will cause the second pollution. Seeking an economical and feasible method to treat sludge and waste acid has been the direction of efforts for many years.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment relates to a method for recycling metal from sludge in steel wire rope production, which includes the following steps:

[0023] For steel wire mill sludge (on a dry basis) w / %, iron: 26%, lead: 0.5%, zinc: 7.5%, copper: 0.01%, phosphorus: 0.1%, waste acid (calculated as HCl) w / %: 7.9%, iron: 13%, lead: 0.25%, zinc: 0.1%, phosphorus: 0.1%, copper: 0.01%, the solid-liquid ratio is 1:3.5 for the reaction, the solid-liquid separation after the reaction, the pH of the solution is 1.9.

[0024] Send the obtained solution into the electrolytic cell, the anode is an iron plate, the cathode is an aluminum plate, and the current is 2000A / m 2 , the voltage is 0.8V, after electrolysis, the mixture of metal lead and copper (a small amount of copper) is obtained at the cathode, which can be commercially available.

[0025] Refined sodium sulfide (0.1005 mol / L) is added to the electrolyte, the pH is adjusted to 1.5 with hydrochloric acid, and the solid and liquid ar...

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PUM

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Abstract

The invention belongs to environmental protection and resource recycling projects and relates to a method for recycling metals in sludge from wire rope production; sludge and acid waste from wire rope manufacturers have a high content of heavy metal lead (2000 ppm and above), which usually does not meet the economic requirement of industrial extraction, and are unable to be treated by the wire rope manufacturers. By using mixing reaction of sludge with the acid waste and electrochemical methods, the problem that the sludge and acid waste are difficult to treat is well solved.

Description

technical field [0001] The invention relates to a method for recycling metal from sludge in steel wire rope production, and belongs to the technical field of environmental engineering. Background technique [0002] The sludge and waste acid from steel wire rope enterprises contain heavy metals (iron, zinc, lead, etc.), oxides and salts. The composition is quite complex. Some people use resin adsorption to treat them, but the cost is too high for enterprises to accept. Using the alkali neutralization method, the obtained mixed slag will cause the second pollution. Seeking an economical and feasible method to deal with sludge and waste acid has been the direction of efforts for many years. Contents of the invention [0003] Aiming at the defects in the prior art, the object of the present invention is to provide a method for recycling metal from sludge in steel wire rope production. [0004] The present invention is achieved through the following technical solutions: [00...

Claims

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Application Information

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IPC IPC(8): C02F11/00C01G9/04C01G49/10C02F103/16
CPCC01G9/04C01G49/10C02F11/00C02F11/006C02F2103/16
Inventor 邓超群
Owner 江苏荣信环保科技有限公司
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