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2022
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Sharing of industrial production practice of indirect zinc oxide
The preparation technology and application research of zinc oxide have been highly valued by most scientific and technological workers, and many related research work has been carried out, and great achievements have been made. As long as the zinc oxide industry can seize the opportunity, actively forge ahead, blaze new trails, and rely on science and technology to improve the industry level, it can be predicted that the preparation method of zinc oxide will continue to improve under the impetus of the industry development, and the research will enter a comprehensive development stage.
The raw material of indirect zinc oxide is zinc ingot or zinc slag obtained from smelting. Zinc is converted into zinc vapor in a graphite crucible at a high temperature of 1000C, and then the blown air is oxidized to produce zinc oxide. After the tube is cooled, zinc oxide particles are collected, with a purity of 99.5% - 99.7%.
Zinc oxide is a special material used for motors, electrical appliances and wires, which can insulate conductors from each other. Therefore, indirect zinc oxide not only has the properties of general materials, but also has the following characteristics.
High resistance coefficient and dielectric strength; Indirect method has high zinc oxide content, low viscosity, high permeability and easy impregnation. Fast drying speed and uniform film thickness; And good stability, moisture resistance and aging resistance; It is resistant to acid and alkali, oil stain and various corrosive gases.
Specializing in the production of calcined zinc oxide and rubber zinc oxide, with good softness, strong adhesion, moderate hardness, high-speed operation, no paint splashing. Low acid value, no adverse effect on conductor and insulator. Simple indirect zinc oxide method can not meet the requirements. Generally, some characteristics of the product are highlighted according to different uses of zinc oxide. In the production process of zinc oxide, the following substances should be controlled to improve the product quality: metal, lead free, water-soluble copper oxide, hydrochloric acid insoluble substances, manganese oxide, sieve residue and loss on ignition. When cadmium free zinc is heated, zinc and cadmium are in the boiling and steam state. Due to the low steam pressure of tin, lead, iron and copper, the zinc liquid meets the rising zinc vapor at the lower part of the production unit, and the zinc vapor is washed by the zinc liquid to remove volatile lead, tin and other impurities.
Indirect zinc oxide is mainly used in rubber manufacturing, silicate industry, medicine and health, coloring materials, electronics and other fields. The specific analysis is as follows:
1. In terms of rubber manufacturing
50% of zinc oxide produced by industrial indirect method flows to rubber industry. As an important reactant of rubber vulcanization, this product and stearic acid are one of the raw materials for rubber manufacturing. The mixture with stearic acid enhances the hardness of rubber.
2. Silicate industry
It is an additive of cement, which can shorten the hardening time of cement and improve the waterproof performance of cement. In the production of glass and ceramics, it can be used as a flux to reduce the sintering temperature of glass and ceramics. The transparency of indirect zinc oxide containing aluminum, gallium and nitrogen is 90%, which can be used as a glass coating to allow visible light to pass through and reflect infrared. Paint can be applied on the inside or outside of the window glass to achieve the effect of thermal insulation.
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Luoyang Danke Zinc Industry Co., Ltd.
Add：Huayang Industrial Cluster, Mengjin County, Luoyang, Henan
Tel：+86-0379-67862286
Mobile：+86-13525964944
+86-15837919773
Email：lydkxy@163.com