Method for preparing conducting paint from waste glass in silver plating industry

Abstract

The invention relates to the fields of chemistry, environmental protection and material science, in particular to a method for preparing a conducting paint by cleaning and recycling waste glass in silver plating industry. The method comprises the following two steps: the recycling and the surface treatment of waste glass in silver plating industry, and the preparation of the conducting paint. Therecycling and the treatment of the waste glass in silver plating industry are realized in such a way that: using the glass discarded by factories in silver plating industry as the main raw material; after recycling, washing and pulverizing according to classifications, wetting with a surfactant, and meanwhile, coupling with a coupling agent. The preparation of the conducting paint is realized in such a way that: adding the main film forming material into a high-speed dispersion machine; adding a solvent, a dispersion assistant and the like; adding silver-plating glass powder; adding metal andnonmetal filling materials, a defoamer, a thixotropic agent, a thickening agent and other assistants, evenly dispersing and mixing, and filtering to obtain the conducting paint. The method reduces theprimary environmental pollution caused by waste glass in silver plating industry, prevents the more serious secondary environmental pollution caused by acid liquor in the process of recycling silverby a chemical method, and has the advantages of no corrosion on equipment and low energy consumption.

Description

technical field [0001] The invention relates to the fields of chemistry, environmental protection and material science, in particular to a method for preparing conductive paint based on cleaning and recycling waste glass in the silver-plating industry. technical background [0002] In the fields of manufacturing industries such as glass mirror making, thermos bottle production, architectural glass and Christmas stationery, a layer of metallic silver is usually plated on the glass surface by electroless plating, which is the so-called silver-coated glass. During the production and use of silver-coated glass, a large amount of silver-containing industrial waste glass will be produced. About 20,000-30,000 tons of silver-containing industrial waste glass are produced by related industries every year. On the one hand, these industrial solid wastes have attracted much attention because of the precious metal silver, and on the other hand, the loss of heavy metal silver has caused ...

AI Technical Summary

Problems solved by technology

In this process, due to the use of a large amount of strong acid solutions such as high-concentration nitric acid, and even the use of "aqua regia" with strong corrosive effects, it has caused more serious secondary environmental pollution and corroded equipment.

[0004] The silver chloride salt obtained by the above process needs to be decomposed and purified at a high temperature of 1000-1100°C to obtain silver with a purity of more than 99.9%, and the purification process consumes a lot of energy

[0005] The discharge of "three wastes" produced by chemical recovery of silver will seriously affect the ecological environment, induce geological disasters, cause changes in groundwater level and water quality, and even cause the accumulation of harmful components such as heavy metals, which will eventually threaten the human living environment

Chemical recovery of silver causes more serious environmental pollution, high energy consumption, corrosion of equipment, and low industrial profits