What is the difference between the indirect method Zinc Oxide and the direct law Zinc Oxide?
Indirect material method of Zinc Oxide is obtained through smelting metal ingots or zinc. Zinc in high temperature graphite crucible at 1000 DEG C converted to zinc vapor, air oxidation of Zinc Oxide before being fed into, and Zinc Oxide collected particles in the cooling pipe. The indirect method is in 1844 by the French scientist Leclair (LeClaire) promotion, also known as the French law. Indirect technology produced by Zinc Oxide is simple and the cost is impacted by raw materials greatly. Zinc Oxide particle indirect method of production with a diameter of 0.1-10 microns, the purity of 99.5%-99.7%. According to the total volume, the indirect method is the main method of production of Zinc Oxide.
Zinc Oxide direct method generally used for ceramics, glaze, glass frit, and pigment industry.Zinc Oxide: the indirect method can be used in rubber, varistors, paint, phosphating solution, film, conductive materials and other industries. The direct effect of heavy metal impurity content of the products of the heavy metal content of zinc or zinc, low heavy metal content of the products, but also can be used for livestock feed, medicine, health care and other industries.
The direct method of Zinc Oxide in a variety of zinc ore or debris as raw material. Zinc Oxide and coke in the reaction when heating is reduced into metallic zinc by the steam, and then oxidation by oxygen in the air for Zinc Oxide, Zinc Oxide to remove most of the impurities. The direct method to obtain coarse particles, the product purity was 75%-99.5%.
Zinc Oxide direct process with a variety of zinc minerals or impurities as raw material;Indirect material method is obtained through Zinc Oxide metal zinc or zinc smelting.
