The company uses state-of-the-art technology (vertical shaft furnaces to convert crude oil coke into calcined coke, and first-class raw materials, under the supervision of the company’s technical experts) after separating the impurities the process calcination is done. Energy consumption in these furnaces is far less than rotary and horizontal furnaces, and therefore the process of production is quite economical. The production capacity of this furnace is about 35 tons in 24 hours. High precision control in temperature changes, as well as stable temperature during all stages of heat treatment and maintaining a uniform temperature with a temperature accuracy of ± 5 ° C are the advantages of the precision technology of this furnace. This makes the calcination process work well and facilitates the automatic heat treatment process.