Method for recovering copper from waste version rollers used for printing to prepare copper oxide powder

Abstract

The invention discloses a method for recovering copper from waste version rollers used for printing to prepare copper oxide powder. The waste version rollers used for printing are treated by acid to dissolve chrome on the surfaces of the waste version rollers, and waste version rollers without chrome on the surfaces are prepared; the waste version rollers without chrome on the surfaces are placedin an ammonia solution, copper on the surfaces of the waste version rollers is dissolved by introduced air, and an ammonia copper carbonate solution is obtained; the ammonia copper carbonate solutionis transferred into a heating kettle and slowly heated to 100 DEG C within 1-2 h, the temperature is preserved for 1 h, after ammonia gas is completely released, copper hydroxide is prepared, and thereleased ammonia gas is absorbed by an absorbing device for recycling; copper hydroxide mixed liquid is transferred into a sedimentation pond and separated from water through sedimentation, and solidsare aired to obtain copper hydroxide powder; the copper hydroxide is subjected to calcining at the high temperature to prepare the copper oxide powder. The method is simple in method, the operation is easy, there are fewer reaction by-products, the productive rate of the copper oxide powder reaches 95%, and the purity reaches 98% or above.

Description

technical field [0001] The invention belongs to the technical field of recycling waste copper resources, and in particular relates to a method for preparing copper oxide powder by recovering copper from waste plate rollers for printing. Background technique [0002] Waste plate kun is the waste produced by large printing factories, which produces about hundreds of thousands of tons every year. The main component of waste plate kun is iron, containing 0.3% to 1.0% chromium and 2.5% to 5% copper. The inner layer of the waste plate kun is iron, and the iron surface is plated with copper and chromium in turn. [0003] As an important inorganic chemical raw material, copper oxide powder is mainly used in fireworks, ceramic and glass colorants, organic synthesis catalysts, oil desulfurizers, magnetic materials, circuit board electroplating electronics industry, artificial silk and gas analysis industries. . The production methods of copper oxide powder mainly include the oxidati...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of method that reclaims copper and prepares copper oxide powder from printing useless plate roller, aims to solve the existing raw material that the method for preparing copper oxide is high-purity red copper wire, red copper rod, copper plate, copper acetate, Problems with copper nitrate or copper sulfate, etc.

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