Manufacturing method of furnace carbon black

Carbon black is produced by incomplete combustion or pyrolysis of natural gas or high aromatic hydrocarbon oil in a reactor. The significant difference between furnace black and slot black and thermal black is that the degree of fusion or coalescence of its particles can be adjusted according to different uses. Therefore, the furnace black with the same particle size range is divided into several derivative varieties with different structures. In addition, the oxygen content of furnace black is usually lower than that of groove black (less than 1%), and the surface is neutral or weakly alkaline. Furnace black production is characterized by the combustion of the fuel in the reactor to provide the heat required for the cracking of the feedstock. Combustion and cracking processes occur simultaneously. According to the different forms of raw materials used, furnace black production can be divided into two types: gas furnace method and oil furnace method. The raw material and fuel used in the gas furnace method are both natural gas. The fuel of the oil furnace method can be natural gas, coke oven gas, or liquid hydrocarbon, and the raw material is high aromatic oil, such as ethylene tar and anthracene oil. In the furnace black production process, the reactor is the core equipment. The production of different types of furnace black requires the use of reactors with different structural sizes. Air and fuel are burned in the reaction furnace, the raw materials are atomized and sprayed into the burning flame, and carbon black is generated by high temperature pyrolysis. Carbon black is suspended in the combustion residual gas to form flue gas. After the flue gas is quenched, it is sent to the air preheater and the oil preheater for further cooling, and finally sent to the bag filter. The separated carbon black is sent to the granulator for granulation, and then dried in the dryer.