Graphite has good chemical stability. Specially process […]
Graphite has good chemical stability. Specially processed graphite, which has the characteristics of corrosion resistance, good thermal conductivity and low permeability, is widely used in the manufacture of heat exchangers, reaction tanks, condensers, combustion towers, absorption towers, coolers, heaters, filters. , pump equipment. Widely used in petrochemical, hydrometallurgy, acid and alkali production, synthetic fiber, paper and other industrial sectors, can save a lot of metal materials.
Graphite electrode calcination process
The carbonaceous raw material is heat-treated at a high temperature to discharge the moisture and volatile matter contained therein, and the production process corresponding to the improvement 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.
(1) Calcination causes profound changes in the microstructure 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, and is a post-order process. Foundation.
(2) 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.