Production process of contact carbon black
Contact carbon black refers to carbon black produced by contact method. The flame of raw material gas combustion is in direct contact with the lower temperature collection surface, so that the carbon black generated by cracking is cooled and attached to the collection surface to produce carbon black. The contact method carbon black has small particles, good dispersion and good reinforcing performance, but the production cost is high and the output is low. It belongs to hard carbon black, mainly used in rubber tire tread.
Production process of oil furnace carbon black
Oil furnace black (oil furnace black) is a carbon black produced by burning and cracking liquid hydrocarbons such as coal tar or petroleum oil in a reaction furnace at 1200-1650°C. Referred to as oil furnace black. According to the structure and form of the reaction furnace, it can be divided into hard carbon black furnace and soft carbon black furnace. The hard carbon black furnace is used to produce super wear-resistant furnace black, super wear-resistant furnace black and high wear-resistant furnace black. The soft carbon black furnace can produce fast extrusion furnace black, general furnace black and semi-reinforcing furnace black, etc.
Performance comparison of oil furnace carbon black and contact carbon black
Compared with other carbon black manufacturing methods, the oil furnace method can manufacture carbon black varieties with different properties, and has the characteristics of many process adjustment methods, high unit production capacity and heat energy utilization rate, low raw material consumption and comprehensive energy consumption, and low cost. Therefore, it has become the leading method of carbon black manufacturing. At present, more than 95% of the carbon black in the world is manufactured by the oil furnace method. That is to say, the furnace method is characterized by a wide range of raw materials to choose from, and the carbon black produced has many properties. various. . Due to the high cost and low output of carbon black produced by the contact method, few people now use the contact method to produce carbon black again, but the performance of contact method carbon black is also better than that of some other production processes, such as particle Small, good dispersion, good reinforcement performance.