Method for preparing zinc oxide from material recovered from zinc-containing anticorrosive paint waste

A technology of anti-corrosion paint and zinc oxide, which is applied in the direction of improving process efficiency, etc., can solve the problems of difficulty in extracting inorganic zinc, complex organic components, high recycling costs, etc., reduce the amount of acid solution and process water, simple operation, and improve leaching rate effect

Inactive Publication Date: 2020-03-13
安徽泰龙锌业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex organic components of the paint, it is difficult to extract inorganic zinc, the recovery rate is low, the recovery cost is high, and the impurity content is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for recovering and preparing zinc oxide from zinc-containing anti-corrosion paint waste, its preferred scheme is the process steps of recovering and preparing high-quality zinc oxide from zinc-containing anti-corrosion paint waste:

[0018] S1: Pretreatment of zinc-containing anti-corrosion paint waste: put the collected zinc-containing anti-corrosion paint waste in a blast drying oven at 40°C to dry to constant weight, and put the dried paint waste into a pulverizer to obtain a particle size of 100 - Paint slag between 120 mesh size, put the paint slag in the mixing cylinder, add 3.0 times the volume of the paint slag thinner, soak for 2 hours, then use a mixer to stir for 30 minutes, use a 200-mesh steel wire sieve to filter, use The polyethylene glycol aqueous solution with a mass concentration of 0.3% was washed twice to obtain a filter residue; the diluent was composed of the following components in terms of mass percentage: glycerol accounted for 10%, cety...

Embodiment 2

[0025] A method for reclaiming and preparing zinc oxide from zinc-containing anticorrosion paint waste, its preferred scheme is, first, reclaiming and preparing high-quality zinc oxide from zinc-containing anticorrosion paint waste:

[0026] S1: Pretreatment of zinc-containing anti-corrosion paint waste: put the collected zinc-containing anti-corrosion paint waste in a blast drying oven at 45°C to dry to constant weight, and put the dried paint waste into a pulverizer to obtain a particle size of 100 - Paint slag between the size of 120 mesh, put the paint slag in the mixing tube, add 3.1 times the volume of the paint slag thinner, soak for 2.5 hours, then use a mixer to stir for 35 minutes, use a 200-mesh steel wire sieve to filter, use The polyethylene glycol aqueous solution with a mass concentration of 0.35% was washed twice to obtain a filter residue; the diluent was composed of the following components in terms of mass percentage: glycerol accounted for 11%, cetyl alcohol...

Embodiment 3

[0033] A method for recovering and preparing zinc oxide from zinc-containing anti-corrosion paint waste, its preferred scheme is the process steps of recovering and preparing high-quality zinc oxide from zinc-containing anti-corrosion paint waste:

[0034] S1: Pretreatment of zinc-containing anti-corrosion paint waste: Put the collected zinc-containing anti-corrosion paint waste in a blast drying oven at 50°C to dry to constant weight, and put the dried paint waste into a pulverizer to obtain a particle size of 100 - Paint slag between 120 mesh size, put the paint slag in the mixing cylinder, add 3.3 times the volume of the paint slag thinner, soak for 3 hours, then use a mixer to stir for 40 minutes, use a 200 mesh wire sieve to filter, use The polyethylene glycol aqueous solution with a mass concentration of 0.4% was washed 3 times to obtain a filter residue; the diluent was composed of the following components in terms of mass percentage: glycerol accounted for 12%, cetyl al...

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Abstract

The invention relates to the technical field of novel material processing, and discloses a method for preparing zinc oxide from a material recovered from zinc-containing anticorrosive paint waste. Through pretreatment of the zinc-containing anticorrosive paint waste, the influence of hydrolysis of organic matter in paint on leaching extraction separation purification in a next step is reduced, theleaching rate is improved, the separation difficulty is reduced, the leaching time is shortened, the leaching temperature is reduced, and the acidity of a leaching solution can be selected at a lowerlevel range; in the extraction process, an extraction reagent and control conditions are selected to achieve high-efficiency low-energy consumption extraction results, finally the zinc oxide is prepared through recovery, the recovery rate is increased by 15-20%, the impurity content is less than 0.001%, and the purity reaches a class-I standard; and the method can significantly improve the quality of the zinc oxide prepared through recovery, reduce energy consumption and save costs, the recovery rate reaches 94% or more, the problems of a complex process, high energy consumption, a low yieldand low quality of current raw ore zinc pyrometallurgy can be solved, and the economic and social benefits are significantly improved.

Description

technical field [0001] The invention belongs to the technical field of new material processing, and in particular relates to a method for recovering and preparing zinc oxide from zinc-containing anticorrosion paint waste. Background technique [0002] Zinc is the fourth most "common" metal, after iron, aluminum and copper. However, it is not the most abundant element in the earth's crust (the top few are oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium). The appearance is silver-white, and it has an indelible position in battery manufacturing in modern industry (the surface of the battery is zinc skin), and it is a very important metal. It is slightly less dense than iron and has a hexagonal crystal structure. With the wide application of zinc, the consumption of zinc in the world market is gradually increasing, and the production and consumption of metal zinc and zinc oxide are growing extremely fast. [0003] With the development of industry, the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B19/34C22B3/10C22B3/38C22B1/00
CPCC22B1/005C22B3/10C22B7/007C22B19/34C22B3/3846Y02P10/20
Inventor 丁宝文
Owner 安徽泰龙锌业有限责任公司
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