Zinc oxide three production processes:direct process zinc oxide , indirect process zinc oxide , Wet active zinc oxide
- Direct method of zinc oxide(direct process zinc oxide) production method is the use of zinc ore, zinc ash, zinc concentrate as raw material by removing equipment to remove impurities obtained by qualified zinc ash, and then qualified zinc ash added to coal, lime according to the technical requirements of ingredients, mixed broken, broken Material with briquettes ball pressure, the pressure of the zinc briquettes stacked well, dry; will dry the briquettes with zinc oxide furnace smelting, after reduction, oxidation and then collected to obtain zinc oxide products. The direct process of zinc oxide particles is coarse and the purity is between 75% and 99.5%.
- The indirect zinc oxide(indirect process zinc oxide) is produced by dissolving the zinc ingot prepared by the electrolysis method in a high temperature crucible and heating it at a temperature of 600 to 700 ° C to melt at a temperature higher than 907 ° C (usually about 1000 ° C) to form zinc Steam and steam are oxidized by oxygen in the air to produce zinc oxide. This oxidation process will emit shiny light along with a decrease in temperature. Subsequently, the zinc oxide particles are collected in a dust collecting chamber by means of a cooling tube, Will be fine particles with a bag to capture, that is made of zinc oxide products. The purity of zinc oxide products produced by indirect process is 99.5% – 99.7%.
- In these industries active zinc oxide than ordinary zinc oxide has a performance advantage. Active zinc oxide itself also has a certain cost advantage, in the case of zinc prices continue to rise, the active zinc oxide has a certain market competitiveness. Made by zinc carbonate calcination. Zinc oxide product purity is generally up to 96%.