The purpose of calcination:
1) raw materials out of the volatile and water. After calcination volatile below 0.5%, moisture below 0.3%.
Calcined coke volatile matter and water represents the degree of calcination, not up to the requirements in the roasting will appear when the two contraction, the formation of cracks.
2) increase the density and mechanical strength of materials. True density more than 2.00g/cm3.
Influence of coke true density of final product real density of calcined, poor mechanical strength bulk density low, influence of molding mainly molding difficult, within the required time block height not up to the requirements, the influence of aluminum electrolytic tank operation, main show is falling.
3) enhancing the conductivity of materials.
Calcined coke resistance influence the final product resistivity.
4) improve the chemical stability of raw materials. Improve antioxidant properties.
Panjin Liao Shuo Carbon Co. Ltd.
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