A Green and Pollution-free Circular Comprehensive Recovery Method for Nickel-nickel Plated Materials
A recycling method and a non-polluting technology, applied in the direction of improving process efficiency, etc., can solve the problems of complex recycling methods, copper, tin, and nickel in scraps that cannot be fully separated and recycled, and achieve the effect of simple recycling methods
Active Publication Date: 2018-06-08
JIANGXI UNIV OF SCI & TECH +1
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Problems solved by technology
[0004] The purpose of the present invention is to provide a green and pollution-free circular comprehensive recycling method for cupronickel-plated materials, which solves the problem that the existing recycling methods for cupronickel-plated materials are complicated, and the copper, tin and nickel of waste materials cannot be fully separated and recycled.
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Embodiment 1
[0026] Embodiment 1: 200 kilograms of white copper plating materials: Pour 200 kilograms of industrial concentrated sulfuric acid into 400 kilograms of water, stir continuously, add 15 kilograms of white copper plating materials that have been peeled off in an appropriate amount, add 20 kilograms of 30% hydrogen peroxide, and add white copper plating while it is hot The material is 200 kg, the reaction time is 30 minutes, and the copper material must be stripped. Take out the copper material, add 10 kg of 30% hydrogen peroxide to the solution for dissolving the plating layer, produce tin hydrolysis precipitate, press filter, wash to obtain the tin hydroxide product. Filtrate reclaims nickel, adds 2 kilograms of 30% sodium hydroxide, produces the hydrolysis precipitation of nickel, adds until no precipitation is formed, presses filter, washes, and obtains nickel hydroxide product. The filtrate is returned to the batching step for recycling.
[0027] Analysis of the products ob...
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The invention discloses a novel green and pollution-free comprehensive recovery technology for a white-copper-coated material. The novel green and pollution-free comprehensive recovery technology comprises the following steps: pouring industrial sulfuric acid into water to prepare sulfuric acid liquor, adding a white-copper-coated material, adding hydrogen peroxide to react, fishing out the unreacted white-copper-coated material, adding sulfuric acid, continuously adding the white-copper-coated material in the liquor, getting out the white-copper-coated material with a coating dissolved after the reaction to obtain a stripped copper material, and recycling tin; adding hydrogen peroxide into the liquor to carry out hydrolytic precipitation until no precipitates are formed, carrying out filter pressing by virtue of a filter press, and washing to obtain a tin hydroxide product and recycling the tin hydroxide product; recycling nickel; adding sodium hydroxide into the liquor to carry out hydrolytic precipitation until no precipitates are formed, carrying out filter pressing by virtue of the filter press, washing to obtain a nickel hydroxide product and recycling the nickel hydroxide product; and recycling the recycled filtrate as liquor in the step. The novel green and pollution-free comprehensive recovery technology has the beneficial effect that the recovery method is simple, the waste materials copper, tin and nickel can be sufficiently separated and recycled.
Description
technical field [0001] The invention belongs to the technical field of recycling of cupronickel-plated materials, and relates to a green and pollution-free circular comprehensive recycling method of cupronickel-plated materials. Background technique [0002] Copper is one of the most commonly used materials in industry due to its good electrical conductivity. In order to prevent discoloration and oxidation of copper, tin or nickel is plated on the surface of copper to make it have good welding performance and anti-oxidation protective layer. During production and after application, waste will be generated, and renewable resources are collectively referred to as nickel-plated copper materials. Considering the requirements of environmental protection and the full utilization of resources, the separation and recycling of tin white material and copper are of great significance. [0003] It is very important to choose a suitable tin-nickel removal process to achieve less invest...
Claims
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IPC IPC(8): C22B7/00C22B15/00C22B23/00C22B25/06
CPCY02P10/20
Inventor 吴伟明杜海燕施力刘建生
Owner JIANGXI UNIV OF SCI & TECH