Carbon black production process and equipment selection

 About Carbon Black

Carbon black is a black powdered form of amorphous carbon. Carbon black is formed by the accumulation of spheroidal or chain particles with an average diameter of 2~3nm, and contains a microcrystalline structure with a diameter of 3~500nm, which can react with various free radical.

Formation And Morphology of Carbon Black

Formation:

 

Carbon black generally refers to carbon particles, generally due to the insufficient combustion of organic matter, wherein the hydrogen and oxygen elements are converted into water, and the carbon element is not fully burned, it will be separated from the molecule, forming carbon black.

Morphology:

Carbon black is composed of carbon, but is usually classified as an inorganic pigment. Carbon black is a black powdery substance produced by incomplete combustion of hydrocarbons in the gas phase or by warm hydrolysis. Due to the different production processes, various products with different properties can be obtained through different process conditions.

(1) Microstructure of carbon black

Carbon black particles have a microcrystalline structure, in carbon black, the arrangement of carbon atoms is similar to graphite, forming a hexagonal plane, usually 3 to 5 such layers to form a microcrystal, because of each graphite layer of carbon black microcrystal, the arrangement of carbon atoms is ordered, and the arrangement of carbon atoms between the adjacent layers is disordered, so it is also called quasi graphite crystal.

(2) Particle size of carbon black

The particle fineness of pigment carbon black can be as low as 5nm, and different production processes can obtain carbon black particles with a very wide particle size range, the products obtained by the lamp black production process are relatively rough, and the gas black production process can obtain fine products.

 

Development And Application

Carbon black is mainly used as a rubber reinforcing agent for the manufacture of automobile tires. Others are also used as pigments (inks, plastics, coatings), conductive agents for dry batteries, catalyst carriers, ultra-hard alloy materials. About 70% of the world's carbon black is used in the manufacture of tires, 20% is used in other rubber, and the remaining less than 10% is used in plastic additives, dyes, printing inks and other industries. 

Carbon Black Powder Grinding Mill

 

Processing carbon black We generally use a mill, in industrial applications, carbon black usually needs to be processed to more than 425 mesh. Between 425-2500 mesh belongs to fine powder, micro-powder category. It is usually necessary to use a Raymond mill or a superfine mill. 

Raymond Mill

 

The carbon black fineness that can be produced by Raymond mill is usually in the 80-325 purpose interval, and the powder in this interval can be applied to most industries that have low requirements for stone powder.

Capacity: 0.2-50 t/h

Max feeding size: 35mm

Processing ability: 0.2-50 t/h

Micro Powder Grinding Mill

 

The finished product processed by the micro-grinding machine is relatively delicate, and the particle size of the finished product is between 200-2500 mesh, and can be adjusted at will to meet the processing needs of carbon black.

Capacity: 0.5-45t/h

Max feeding size: 20 mm

Processing ability: 0.5-45t/h

Pulverizing Process

Stage 1：

The carbon blackis crushed by the crusher to the fineness (15mm-35mm) that can enter the mill.

Stage 2:

The crushed small pieces of carbon black are sent to the storage hopper through the elevator, and then sent to the grinding chamber of the mill evenly and quantitatively through the feeder for grinding.

Stage 3:

According to yourself choice of grinding equipment, the material after grinding is graded by the classification system, and the unqualified powder is graded by the classifier and returned to the host for re-grinding.

Stage 4:

The powder that meets the fineness enters the dust collector through the pipeline for separation and collection, and the collected finished powder is sent to the finished product silo by the conveying device through the discharge port, and then is uniformly packed with a powder tanker or an automatic baler.