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Silver component-containing waste recovery treatment method

A technology of recycling and waste, which is applied in the field of waste recycling and processing, can solve problems such as easy pollution and danger, and achieve the effect of streamlining steps

Inactive Publication Date: 2015-07-08
陈怡雯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Since the currently used method of recovering silver needs to use a high temperature exceeding 100°C or a high-concentration strong alkali or strong acid solution, it is not only dangerous but also easy to cause pollution.

Method used

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  • Silver component-containing waste recovery treatment method
  • Silver component-containing waste recovery treatment method

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Embodiment Construction

[0023] figure 1 It is a flow chart showing the waste recovery treatment method of silver-containing components of the present invention.

[0024] Please refer to figure 1 The steps of the silver-containing waste recovery treatment method of the present invention may include an acid solution preparation and reaction step, a stabilization step and a precipitation reduction step.

[0025] The acid solution preparation and reaction step S1 is to prepare an acid solution first, and perform a first reaction step with at least one silver-containing waste and the acid solution to produce a recycled acid solution mixture containing silver components. The at least one silver-containing waste can be computer parts, silver products, semi-finished silver products, silver-containing chemical raw materials or silver-containing minerals, but is not limited thereto.

[0026] In the acid solution preparation and reaction steps, the acid solution can be nitric acid / hydrochloric acid mixed acid...

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Abstract

A method for recycling and processing waste containing a silver component comprises: a step of preparing an acid liquid and performing a first reaction between waste containing a silver component and the acid liquid, so as to produce an acid liquid mixture containing the silver component; a step of preparing an alcohol liquid, and performing a second reaction between the acid liquid mixture containing the silver component and the alcohol liquid, so as to produce a stabilized acid liquid mixture; a step of preforming a third reaction among the stabilized acid liquid mixture, an alkaline compound and ionized water with the resistivity of 18.2MΩ•cm, so as to produce a silver semi-finished product; and performing further processing to obtain a silver finished product or a product made of silver.

Description

technical field [0001] The present invention relates to a related field of waste recycling and processing, in particular to a method for recycling and processing waste containing silver components. Background technique [0002] The recovery of metallic silver from silver-containing waste has very high economic value; and at present, the methods for recovering silver from silver-containing waste mainly include fire method and wet method. [0003] Because the fire method consumes a lot of energy, and requires a high temperature of more than 100 ° C, and produces pollution at the same time, the recovery rate is not high; while the wet method is used more often, an appropriate method is generally used to dissolve the silver in advance and transfer the solid silver to the solution. After extraction, the dissolution methods include concentrated sulfuric acid dissolution method, nitric acid dissolution method, strong alkali dissolution method, thiourea dissolution method, etc. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00
CPCC22B3/06C22B11/042Y02P10/20
Inventor 吕芳贤
Owner 陈怡雯