Carbon black is a light, loose and fine black powder with a very large specific surface area ranging from 10-3000m2/g. It is a product of incomplete combustion or thermal decomposition of organic compounds (natural gas, heavy oil, fuel oil, etc.) under conditions of insufficient air. Mainly used for reinforcement in the rubber industry, coloring in the field of plastics, coatings and inks, as well as special functional effects and conductivity. Carbon black is generally classified according to below production methods:

1： Furnace carbon black: In a closed reaction furnace, raw materials (liquid hydrocarbons, gaseous hydrocarbons or their mixtures) are mixted with an appropriate amount of air. By burning some of the raw materials with air to reach high temperature, the other part of the raw materials are cracked to produce carbon black. The manufacturing method mainly uses gaseous hydrocarbons as the main raw material is the gas furnace method, while the oil furnace method uses liquid hydrocarbons as the raw material. The characteristics of furnace method for producing carbon black are high production efficiency and low energy consumption of the product.

2： Channel carbon black: Raw materials natural gas or coal gas is incompletely burned with air through ceramic nozzles in a naturally ventilated fire room, forming a fish tail shaped flame. Through the contact between the flame reduction layer and the slowly reciprocating channel steel, the carbon black is produced by cracking, it is deposited on the surface of the channel steel. The surface of channel carbon black undergoes oxidation with many functional groups, which helps carbon black to have better dispersibility. 

3： Hot cracking carbon black: The hot cracking method is a discontinuous method for producing carbon black. Each production line is equipped with two reaction furnaces lined with refractory materials. During production, natural gas and air are first introduced into one reaction furnace and burned. After the reaction furnace reaches a certain temperature, the introduction of air is stopped, allowing the combustion gas to crack and produce carbon black under isolated air conditions. The carbon black produced by the hot cracking method has the characteristics of large particle size and high purity.

4： After treatment carbon black: After treatment carbon black is the process of improving the surface functional groups of carbon black by adding ozone, strong acid or additives, in order to enhance the dispersibility of carbon black, as well as the coloring and other properties of carbon black.