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[Chemical Knowledge]：Manufacturing method and process flow of zinc powder

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The manufacturing method
of zinc powder
1. Introduction

Zinc powder has important application value in the field of raw materials for chemical production, especially in the fields of rust prevention, coatings, plastics and so on. In order to meet the needs of different fields for the performance of zinc powder, it is very important to study the manufacturing method of zinc powder. This paper will introduce the manufacturing methods of zinc powder in detail, including physical method, chemical method and physical chemical method, and analyze the advantages and disadvantages of various methods, in order to provide theoretical guidance for the production of zinc powder.
The physical manufacturing method of
2. zinc powder

1. Ball milling method: The zinc ingot is added to the ball mill, and the zinc ingot is crushed into zinc powder through the rotation of the ball mill and the impact of the ball milling medium. The advantages of this method are simple process and low cost, but the product has a wide particle size distribution and the fineness is difficult to control.
2. Gas atomization method: the molten zinc is sprayed into the high-speed gas flow through the nozzle, so that the zinc is broken into small droplets by the shear force and cooling effect of the gas flow, and the rapid solidification in the air into zinc powder. The advantage of this method is that the product has fine particle size and uniform distribution, but the equipment investment is large and the energy consumption is high.

3. zinc powder chemical manufacturing method

1. reduction method: zinc salt solution is added to the reducing agent (such as sodium hydroxide, calcium hydroxide, etc.), the zinc ion is reduced to metal zinc, and precipitation. The advantage of this method is that the product purity is high, but the process conditions are difficult to control, and it is easy to produce waste residue wastewater.
2. Electrolysis method: zinc salt solution is used as electrolyte, and zinc metal is precipitated on the cathode by electrolysis. The advantages of this method are high product purity and fine particle size, but high energy consumption and high equipment maintenance costs.

4. zinc powder physical and chemical manufacturing method

1. Plasma method: the use of plasma high energy density and high temperature characteristics, the zinc atoms in the gas are ionized and deposited on the collection plate, the formation of zinc powder. The advantages of this method are fine particle size and high purity of the product, but the equipment investment is large and the operating cost is high.
2. Laser method: the high energy density of the laser beam is used to irradiate the zinc target, so that the surface of the zinc target is rapidly melted and evaporated, and at the same time, it is condensed into zinc powder under the protection of inert gas. The advantages of this method are narrow particle size distribution and high purity, but the equipment cost is high and the production efficiency is low.

5. the advantages and disadvantages of various manufacturing methods.

physical manufacturing methods have the advantages of simple process and low cost, but the product particle size distribution is wide and the fineness is difficult to control; chemical manufacturing methods can obtain high-purity products, but the process conditions are difficult to control, which may produce waste residue and wastewater; physical and chemical manufacturing methods can obtain high-purity, fine-grained products, but the equipment investment is large and the operating cost is high. Therefore, when selecting the manufacturing method of zinc powder, it is necessary to comprehensively consider the specific product requirements and production costs.

6. Conclusion There are many manufacturing methods for

zinc powder, including physical method, chemical method and physical chemical method. Various methods have their advantages and disadvantages, and need to be considered comprehensively according to specific product requirements and production costs. In the future, with the continuous progress of science and technology and the improvement of environmental protection requirements, the manufacturing method of zinc powder will continue to develop and optimize, providing more high-quality zinc powder products for the field of chemical production raw materials.

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