Silicon carbide abrasives usually use quartz and petroleum coke as the main raw materials. They are mechanically processed into appropriate particle sizes during the material preparation process, and then the silicon carbide manufacturer mixes them into furnace materials according to chemical calculations. The abrasive regulates the permeability of the furnace material, and an appropriate amount of wood chips should be added when mixing the furnace material. When refining green silicon carbide, an appropriate amount of salt should also be added to the furnace charge.
During the production of silicon carbide by silicon carbide manufacturers, various materials mentioned above are taken out during different operating stages of the electric furnace. The order of removal is sometimes inconsistent with the above order, and collection is not entirely based on the above classification. Usually, the classification of operations is to collect spent materials together with a portion of silicon carbide as spent materials; A portion of silicon oxycarbide, together with amorphous and secondary products, is collected and generally referred to as the return charge. The adhesive is sometimes collected in the furnace material, and sometimes a portion of it is selected to be larger and tightly bonded, while those containing significantly more impurities are discarded.