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Activated carbon is an indispensable material in the fields of industry and agriculture, defense, transportation, medicine and health, environmental protection and cutting-edge science. It is widely used in the fields of water treatment, gas and liquid refining, separation and air purification. The
Activated carbon is obtained by physical and chemical processing of plants, coal or other carbon-containing industrial wastes as raw materials. Can be used for the preparation of activated carbon source of raw materials, generally as long as the carbon-rich substances can be used as raw materials for the preparation of activated carbon. Raw materials according to the source can be divided into two major categories of plants and minerals. Among them, the plant can be used raw materials include: wood, coconut shell, walnut shell, apricot, olive kernel, rice husk, etc .; mineral raw materials include: anthracite, asphalt, petroleum coke and so on.
Activated carbon physical production is divided into two processes:
The first step is carbonization
The raw material is dried at a temperature of 170 ° C to 600 ° C, and 80% of its organic constituents are carbonized to obtain a carbonized material
The second step is activated
The carbonized material is fed into the reaction furnace and reacts with the activator and water vapor. During the endothermic reaction, the CO and H2 combined gases are mainly used to heat the carbonized material to the appropriate temperature (800 to 1200 ° C), remove all of its decomposable substances, produce abundant pore structure and huge specific surface area, So that activated carbon has a strong adsorption, thus the activation process is completed, the activated carbon products.
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