Technological process for extracting gold, silver and palladium from electronic industry waste

A process method, a technology of the electronics industry, applied in the direction of improving process efficiency, etc., can solve problems such as poor operating environment, and achieve high-efficiency extraction and good economic benefits

Inactive Publication Date: 2005-04-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the operating environment of many metallurgical technologies is poor, and there is a lack of combi

Method used

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  • Technological process for extracting gold, silver and palladium from electronic industry waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Dry the solid slag such as the solid slag produced by the display production line, the solid slag produced by the mobile phone, computer and other circuit board production lines at a temperature of 105 ° C, and crush it with a ball mill after drying, and sieve to remove impurities.

[0027] (2) Using an X-ray fluorescence spectrometer (XRF) to analyze the content of each element to determine the specific parameters of the process.

[0028] (3) The solid slag contains organic matter, and the organic matter will consume the oxidant during the extraction process and will adsorb precious metals, resulting in additional loss of precious metals. Therefore, the pulverized solid slag is burned in a muffle furnace, and the temperature is controlled between 450 and 500 ° C. Because the temperature is too low, the burning is not sufficient, and the temperature is too high, which will cause the metal palladium Pd to oxidize into palladium oxide PdO. Palladium oxide is difficult...

Embodiment 2

[0046] Other conditions remain unchanged, the firing temperature in the muffle furnace in (3) of Example 1 is controlled between 400-450° C., and the firing time can be about 11 hours.

Embodiment 3

[0048] With other conditions unchanged, the hydrochloric acid in (4) of Example 1 was replaced with sulfuric acid with a volume ratio of 1:6, and the weight ratio of sulfuric acid to solid slag was 5:1.

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Abstract

The invention discloses a kind withdraws golden, the silver, the arrowhead used in ancient times technique from the electronics industry waste residue, he solved the organic matter to withdraw the process to the precious metal the disturbance, realized the minute using the hydrometallurgy technology step to withdraw golden, the silver, the arrowhead used in ancient times goal. The technique has the operating environment well, the cost is inexpensive, the precious metal first experience higher merit which withdraws.

Description

technical field [0001] The invention relates to a hydrometallurgical technology for extracting gold, silver and palladium from an electronic industry waste residue. Background technique [0002] Electronic industrial waste is the solid waste produced on the production line of electronic industrial enterprises. The manufacturer has not done any treatment and discarded it at will, polluting the environment. After analysis, the waste contains precious metals such as gold, silver, and palladium, and has extremely high utilization value. At present, many metallurgical technologies operate in a poor environment, and there is a lack of combined metallurgical technologies for extracting gold, silver, and palladium from such waste residues at one time. Contents of the invention [0003] In order to extract gold, silver and palladium from the solid slag containing organic matter at one time, the present invention provides a combined hydrometallurgy technology, which realizes the ex...

Claims

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Application Information

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IPC IPC(8): C22B11/00C22B11/06
CPCY02P10/20
Inventor 周培国郑正帖靖玺罗兴章唐登勇江芳袁守军牟艳艳
Owner NANJING UNIV
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