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What is the purpose of calcination?

May 21, 2019
The carbonaceous raw material is heat treated at a high temperature to discharge the moisture and volatile matter contained therein, and accordingly
The production process of the original cooking performance is called calcination. Generally, the carbonaceous raw material is calcined by using gas and its own volatiles as a heat source, and the maximum temperature is 1250-1350 °C.
Calcination makes profound changes in the structure and physicochemical properties of carbonaceous raw materials, mainly in improving the density, mechanical strength and electrical conductivity of coke, improving the chemical stability and oxidation resistance of coke, laying a foundation for the subsequent process. .
Calcined equipment mainly includes tank calciner, rotary kiln and electric calciner. The quality control index of calcination is that the true density of petroleum coke is not less than 2.07g/cm3, the resistivity is not more than 550μΩ.m, the true density of needle coke is not less than 2.12g/cm3, and the resistivity is not more than 500μΩ.m.

 
*source:http://www.adbrain.org/FAQ/20190506/45.html
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