Methods for removing iron impurities from zinc oxide

2021-04-06

Zinc oxide is an inorganic compound with the chemical formula ZnO, an oxide of zinc. It is soluble in acids and strong alkalis, but insoluble in water. It is a commonly used chemical additive with a wide range of applications. Zinc oxide plays different roles in different industrial fields. For example, it acts as a colorant in synthetic rubber. In glass, it can improve transparency and brightness. In natural rubber, it can improve heat aging resistance. In addition, zinc oxide brings many conveniences to our lives. Adding zinc oxide products to shoe soles can continuously increase the hardness of the soles. It has many other uses.

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　　 Zinc oxide It is an inorganic substance, with the chemical formula ZnO, and is an oxide of zinc. It is soluble in acids and strong alkalis, but insoluble in water. It is a commonly used chemical additive with a wide range of applications.

　　Zinc oxide plays different roles in different industrial fields. For example, it acts as a colorant in synthetic rubber. In glass, it can improve transparency and brightness. In natural rubber, it can improve heat aging resistance. In addition, Zinc oxide it brings many conveniences to our lives. Adding zinc oxide products to shoe soles can continuously increase the hardness of the soles. It has many other uses, bringing us great convenience. However, what if there are impurities in zinc oxide during use? At this time, it is necessary to find ways to remove impurities. Below, we will specifically introduce the method of removing iron impurities contained in zinc oxide.

　　1. The first step in removing iron impurities is to filter, and it should be filtered while hot, otherwise zinc sulfate will crystallize and enter the filter cake, reducing yield.

　　2. Dry internally using a high-temperature oven, mainly to remove the water of crystallization in the compound.

　　3 Zinc oxide The reaction with sulfuric acid to produce zinc sulfate is necessary, so that no new impurities are introduced, and the impurities in zinc oxide can be better removed.

　　Using the above methods can better remove impurities in zinc oxide, improve Zinc oxide quality, better meet the needs of industrial production, achieve resource recycling, and improve economic efficiency.


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