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Process for recycling precious metals

A precious metal and process technology, applied in the field of precious metal recycling and reuse technology, can solve problems such as waste, damage to ceramic packaging shells, and low efficiency of precious metal recycling and reuse, and achieve the effect of reducing costs and recycling time

Inactive Publication Date: 2020-11-13
FUJIAN MINHANG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing recovery and reuse efficiency of precious metals is very low. For example, gold plating is often required in the ceramic packaging shell, but the existing technology uses potassium cyanide to directly remove gold, and potassium cyanide is very toxic. Therefore, during the recycling process, employees are required to wear gas masks and protective clothing, and a closed space is required for recycling. After the gold recycling is completed, the remaining waste liquid is also very toxic. It can only be discharged after special treatment is required; and after the metal is recycled, the ceramic packaging shell is damaged; and it is only for the recovery of gold, and the nickel and silver in it are not recovered, resulting in huge waste

Method used

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  • Process for recycling precious metals

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The present embodiment is used for withdrawing gold or silver or nickel, and specifically includes the following steps:

[0024] Configure the recovery solution, take an appropriate amount of water, choose 60g of gold dressing agent per liter of water, and 30g of anti-staining salt, mix them and fully react, filter out insoluble substances, and move to the recovery tank for use. The pH of the recovery solution is 12 .

[0025] Place the items that need to be recycled into the rolling basket. The items that need to be recovered are ceramic packaging shells, and the ceramic packaging shells are plated with 2 micron thick gold;

[0026] Put the items that need to recover metal in the rolling basket, immerse the rolling basket in the recovery liquid, wait until the recovery liquid submerges the items that need to recover metal, roll slowly and fully contact the recovery liquid, after 3 to 10 minutes, you can After the gold recovery is completed, take out the items that nee...

Embodiment 2

[0029] The present embodiment is used for withdrawing gold or silver or nickel, and specifically includes the following steps:

[0030] Configure the recovery solution, take an appropriate amount of water, choose 75g of gold dressing agent per liter of water, and 37.5g of anti-staining salt, mix them and fully react, filter out the insoluble matter, and move to the recovery tank for use. The pH of the recovery solution is 12.

[0031] Place the items that need to be recycled into the rolling basket. The items that need to be recovered are ceramic packaging shells, and the ceramic packaging shells are plated with 2 micron thick gold;

[0032] Put the items that need to recover metal in the rolling basket, immerse the rolling basket in the recovery liquid, wait until the recovery liquid submerges the items that need to recover metal, roll slowly and fully contact the recovery liquid, after 3 to 10 minutes, you can After the gold recovery is completed, take out the items that ne...

Embodiment 3

[0035] The present embodiment is used for withdrawing gold or silver or nickel, and specifically includes the following steps:

[0036] Configure the recovery solution, take an appropriate amount of water, choose 90g of gold dressing agent per liter of water, and 45g of anti-staining salt, mix them and fully react, filter out insoluble substances, and move to the recovery tank for use. The pH of the recovery solution is 12 .

[0037] Place the items that need to be recycled into the rolling basket. The items that need to be recovered are ceramic packaging shells, and the ceramic packaging shells are plated with 2 micron thick gold;

[0038] Put the items that need to recover metal in the rolling basket, immerse the rolling basket in the recovery liquid, wait until the recovery liquid submerges the items that need to recover metal, roll slowly and fully contact the recovery liquid, after 3 to 10 minutes, you can After the gold recovery is completed, take out the items that nee...

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PUM

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Abstract

The invention provides a process for recycling precious metals. The process comprises the steps that a recycling solution is prepared, wherein the recycling solution comprises a gold ore dressing agent, anti-dyeing salt and water, and the ratio of the gold ore dressing agent to the anti-dyeing salt is 2:1; an object with metal to be recycled is placed into the recycling solution, and the object isvibrated; the object is taken out within a set time; and according to the prior art, required precious metals are recycled in waste liquid. The process can be used for gold withdraw, silver withdrawand nickel withdraw, the recycling solution has no strong toxicity, no specific room is needed, the cost of enterprises is greatly reduced, and recycling time is greatly reduced.

Description

technical field [0001] The invention relates to a recovery and reuse process of precious metals. Background technique [0002] The existing recovery and reuse efficiency of precious metals is very low. For example, gold plating is often required in the ceramic packaging shell, but the existing technology uses potassium cyanide to directly remove gold, and potassium cyanide is very toxic. Therefore, during the recycling process, employees are required to wear gas masks and protective clothing, and a closed space is required for recycling. After the gold recycling is completed, the remaining waste liquid is also very toxic. It can only be discharged after special treatment is required; and after the metal is recycled, the ceramic packaging shell is damaged; and it is only for the recovery of gold, and the nickel and silver in it are not recovered, resulting in Huge waste. Contents of the invention [0003] The technical problem to be solved by the present invention is to p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00C22B23/00
CPCC22B7/006C22B11/04C22B23/0407Y02P10/20
Inventor 张静罗丽强傅建树
Owner FUJIAN MINHANG ELECTRONICS
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