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How is zinc dust produced?

How is zinc dust produced?

How is zinc dust produced?
Micron micro particles of zinc metal with a purity of over 99% and form a spherical, zinc dust. Since this product is produced from raw materials with the highest degree of purity and under controlled conditions, it contains zinc metal with very uniform grading.
Zinc dust production methods
In general, zinc dust is produced in two common ways, which are discussed below.
Production of zinc powder by distillation method: In order to convert zinc into steam, many types of jars are used. These jars include electro thermal jars, horizontal jars and New Jersey jars. Zinc is converted to steam from high-grade zinc ingots or scraps and slag from galvanizing workshop.
Depending on the steam condition, its density, and how the process is controlled, the size of the zinc may vary. In this method, energy is consumed about 1000 kilowatt hours per ton of dust. In addition, about 15 cubic meters of gas is used for melting and preheating per ton of zinc dust.
Production of zinc powder by atomization method: Converting liquids to powder is called atomization. In this method, zinc must first be molten and then the fine droplets of molten zinc are combined with a horizontal air stream. At this stage, air pressure leads to atomization of zinc droplets. In the final stage, the zinc dust produced by the bag filters is collected.
Of course, according to experts, this method leads to the production of zinc powder, and the distillation method is the main method of producing zinc dust. Because in the atomization method, the product produced is larger than the product of the previous method.
The difference between the production method of zinc dust and zinc powder
Zinc powder is produced in irregular geometric shapes, but zinc dust is completely spherical and has a higher specific surface area than zinc powder. High specific surface area increases zinc oxide and decreases metal zinc content. A thin layer of oxide forms on the metal, which reduces the content of the metal and needs to be felt again to solve this problem. In general, a high percentage of zinc oxide causes the product to return to the smelter.
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