Comprehensive recovery processing method for waste hybrid copper chloride etching liquid

A technology for waste etching solution and recycling treatment, which is applied in the field of comprehensive recovery and treatment of mixed copper chloride waste etching solution, and achieves the effects of remarkable economic benefits, simple process operation and reasonable design.

Active Publication Date: 2014-02-05
浙江科菲科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has strong requirements on the waste etching solution itself. Compared with the waste etching solution formed by a large number of various channels, the PCB waste etching solution is only a part of it.
Therefore, recycling technology has its great limitations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Mix 5L of the above acidic etching waste solution with 1L of alkaline etching waste solution (this ratio is equivalent to the two etching waste solutions currently on the market), and the pH value after mixing is about 1.2;

[0039] 2) The mixed etching solution is concentrated to a nearly saturated cupric chloride solution, the content of which is 336g / L of copper ions and 875g / L of chloride ions;

[0040] 3) The concentrated copper chloride solution enters the spray pyrolysis device through a peristaltic pump. The device includes four parts: a carrier gas device, an ultrasonic atomization device, a tubular heating furnace and a collection device. The carrier gas device uses compressed air as the carrier gas The ultrasonic atomization device is equipped with 6 ultrasonic transducers with a frequency of 1.75 MHz; the quartz reaction tube (diameter 55 mm, length 1000 mm) controls the temperature in the quartz tube to be 800 ° C; the spray droplets pass through the enti...

Embodiment 2

[0046] 1) Take 4L of the above acidic etching waste liquid and mix with 2L of alkaline etching waste liquid;

[0047] 2) Concentrate the mixed etching solution to a saturated solution close to copper chloride, the content of which is 328g / L of copper ions and 869g / L of chloride ions;

[0048] 3) The concentrated copper chloride solution enters the spray pyrolysis device through a peristaltic pump. The device includes four parts: a carrier gas device, an ultrasonic atomization device, a tubular heating furnace and a collection device. The carrier gas device uses compressed air as the carrier gas The ultrasonic atomization device is equipped with 6 ultrasonic transducers with a frequency of 1.75 MHz; the quartz reaction tube (diameter 55 mm, length 1000 mm) controls the temperature in the quartz tube to be 800 ° C; the spray droplets pass through the entire quartz tube The time is about 0.6s, and the pushing force of the peristaltic pump is 1.5MPa;

[0049] The specific process...

Embodiment 3

[0054] 1) Mix 6L of the above acidic etching waste solution;

[0055] 2) Concentrate the mixed etching solution to a saturated solution close to copper chloride, the content of which is 350g / L of copper ions and 950g / L of chloride ions;

[0056] 3) The concentrated copper chloride solution enters the spray pyrolysis device through a peristaltic pump. The device includes four parts: a carrier gas device, an ultrasonic atomization device, a tubular heating furnace and a collection device. The carrier gas device uses compressed air as the carrier gas The ultrasonic atomization device is equipped with 6 ultrasonic transducers with a frequency of 1.75MHz; the quartz reaction tube (diameter 55 mm, length 1000 mm) controls the temperature in the quartz tube to be 785 °C; the spray droplets pass through the entire quartz tube. The time is about 0.6s, and the pushing strength of the peristaltic pump is 2.5MPa;

[0057] The specific process of spray pyrolysis: add the concentrated high...

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Abstract

The invention discloses a comprehensive recovery processing method for waste hybrid copper chloride etching liquid, which belongs to the field of non-ferrous metal and metallurgical valuable metal recover. The technological process of the method mainly comprises the following steps: (1) concentrating copper chloride etching liquid; (2) carrying out spray pyrolysis on a concentrated copper chloride solution so as to form copper oxide composite powder; (3) recovering chlorine so as to prepare a refined hydrochloric acid; (4) leaching the copper oxide composite powder by using a sulfuric acid; and (5) carrying out selective electrodeposition on copper sulfate leaching liquid by using a rotational flow electrolysis system so as to obtain a cathode copper product which of chemical compositions reach 1# copper product standards. The method disclosed by the invention is simple in process, short in flow, environment-friendly, and simple and feasible in operation, can effectively implement the comprehensive recovery of acidic and alkaline copper chloride etching liquid and the direct production of high-quality copper products, and effectively converts chlorine ions in waste liquid into refined hydrochloric acid products, thereby achieving the efficient and comprehensive utilization of resources.

Description

technical field [0001] The invention belongs to the technical field of recovery of valuable metals in hydrometallurgy of non-ferrous metals, and in particular relates to a method for comprehensive recovery and treatment of mixed copper chloride waste etching solution. Background technique [0002] In recent years, the rapid development of the copper products industry has brought about the generation of a large amount of copper-containing waste liquid. At the same time, the country's environmental protection requirements are increasing day by day. Therefore, the treatment and discharge of copper-containing waste has become a major problem for enterprises. Technically, the removal of free divalent copper ions is relatively mature, and the mass concentration of residual copper ions in the solution after treatment can be reduced to below 1mg / L. However, in the copper-containing wastewater of dyestuff, electroplating, circuit board (PCB) and other industries, copper ions often e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/46
Inventor 邓涛门海芬佟永明沈李奇林元吉
Owner 浙江科菲科技股份有限公司
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