Explanation of common terms in carbon black industry

collection of carbon black

The process of separating carbon black from carbon black flue gas for reprocessing into products. Furnace carbon black is usually collected by cyclone separator in series with bag filter. Contact method carbon black is to deposit the carbon black in the flame reduction layer on the surface of metal (such as channel steel), and then scrape it off and collect it through screw conveyor or pneumatic conveying. Hot cracking carbon black is generally collected by cyclone separator.

refinement of carbon black

In the process of carbon black production, the process of removing inclusions such as iron filings and coke particles in carbon black before powdered carbon black is fed into the granulator. Equipment such as air separation, magnetic separation, screening or particle crusher can be used to remove inclusions or grind them into fine powder to ensure product quality.

conveying of carbon black

In the process of carbon black production, the collected powdered carbon black is transported to the granulator by pneumatic (pneumatic) or screw conveyor for granulation, and the granulated carbon black is sent to the storage bin by bucket elevator.

shipment of carbon black


It refers to the transportation of carbon black from the manufacturer to the user. Domestic rubber carbon black is mostly packed in bags and then transported to users by car or train. Bulk transportation is to send carbon black to users by railway tank car or box dump truck, which is suitable for wet granulation carbon black transportation. Bulk transportation has low cost and little pollution, which is suitable for mechanized and automated production in rubber plants. It is the development direction of carbon black transportation.

hard carbon black

A customary classification of carbon black for rubber. It refers to the carbon black with reinforcement as the main role in rubber products, which is relatively soft carbon black. The standard average particle size is in the range of 11 ~ 30 nm. Carbon black produced by contact method and most carbon black produced by oil furnace method are also hard carbon black.

soft carbon black

A customary classification of carbon black for rubber. It refers to carbon black that has poor reinforcement effect in rubber products and plays a filling role to a large extent, which is relatively hard carbon black. The standard average particle size is in the range of 31 ~ 500 nm. Carbon black produced by gas furnace method and hot cracking method and a small part of carbon black produced by oil furnace method also belong to soft carbon black.

super abrasion furnace black; SAF

The particle size of carbon black for rubber is 11 ~ 19 nm. When used in rubber products, its wear resistance is better than other kinds of carbon black. It is mainly produced by oil furnace method. However, due to low yield, high cost, large heat generation, short scorch time, and difficult processing, the amount used in rubber products is small.

intermediate super abrasion furnace black; ISAF

A main variety of hard carbon black, produced by oil furnace method, with particle size of 20 ~ 25 nm. Structurally, it can be divided into high structure, standard structure and low structure derivatives. It can endow rubber with high tensile strength, tear strength, wear resistance and aging performance. It can significantly improve the wear resistance and puncture resistance of tires when used in tire tread.

high abrasion furnace black; HAF

The most commonly used variety of hard carbon black is produced by oil furnace method, with particle size of 26 ~ 30 nm

。 From the structure, there are high structure, standard structure and low structure. The tensile strength, tear strength, wear resistance and aging properties of rubber products are second only to those of CSL wear-resistant carbon black. When used in tire tread, it can improve the wear resistance and puncture resistance.

fast extruding furnace black; FEF

Also known as easy pressing furnace black. A variety of soft carbon black, produced by oil furnace method, with particle size of 40 ~ 48nm. Due to the large particle size and high structure, it can give the rubber good processability and high constant elongation stress, low elongation and hardness, small heat generation and good thermal conductivity, and superior high temperature resistance. Applicable to NR and Sr.

general purpose furnace black; GPF

An important variety of soft carbon black, produced by oil furnace method, with particle size of 49 ~ 60 nm. The particle size is slightly smaller, which can give the compound higher constant elongation stress, good processability, high resilience and flexion flexibility. It is suitable for NR and Sr. It is mainly used in tire ply, lower tread, sidewall and inner tube.

semi-reinforcing purpose furnace black; SRF

One of the main varieties of soft carbon black is divided into gas furnace method and oil furnace method. The particle size is 61 ~ 100nm. Give the compound high elongation, low heat generation, high elasticity and good aging resistance. It is applicable to NR and Sr, and has both reinforcing and filling effects on NBR and Cr. It is mainly used in various rubber products for carcass buffer rubber and cord rubber.

carbon black for special applications

Carbon black that can give products special performance requirements. Carbon black has a wide range of uses, in addition to rubber products, there are other uses, so it is divided into rubber carbon black and special carbon black. Special carbon black can be obtained by post-treatment of disposable carbon black. After treatment, mechanical grinding, chemical gas-phase and liquid-phase surface oxidation treatment are often used. Oxidants include nitrogen dioxide, ozone, oxygen, air and nitric acid, ammonium nitrate, potassium permanganate, hypochlorite, etc., which can change the properties of raw carbon black to meet different requirements. Special carbon black is used for coloring and conducting materials, such as paint, ink, resin, black film, toner, film, magnetic tape, optical disc, etc.

standard reference carbon black

A kind of rubber carbon black with typical physical and chemical properties, uniform quality and stable performance. It is mainly used as a reference material for carbon black manufacturers and rubber products factories to verify the reproducibility and reproducibility of tests.

industrial standard reference black

It is a kind of carbon black with uniform and stable quality, which is produced by a designated manufacturer, has been determined by several laboratories with standard methods, and has been confirmed by the legal department, and is used to verify instruments and methods in the laboratory and improve the reproducibility between laboratories.

color black

Carbon black used as coloring pigment in inks, paints, coatings and other products. According to the coloring intensity (or blackness) and particle size, it is generally divided into high pigment carbon black, medium pigment carbon black, ordinary pigment carbon black and low pigment carbon black. It is mainly produced by contact method and oil furnace method.

high color black

A kind of pigmented carbon black. The particle size range is 9 ~ 17 nm, and the blackness reaches or exceeds the No. 1 standard sample. Fine particles and high blackness. It is mainly used for coloring paint, ink, etc.

medium color black

A kind of pigmented carbon black. The particle size range is 18 ~ 25nm, and the blackness reaches or exceeds the No. 3 standard sample. The particles are small and the blackness is moderate. It is mainly used for coloring paint, ink, etc.

regular color black

A kind of pigmented carbon black. The particle size range is 26 ~ 37 nm, and the blackness reaches or exceeds standard sample No. 6. The particles are larger and the blackness is smaller. It is mainly used for coloring paint, ink, etc.

low color black

A kind of pigmented carbon black. The particle size is greater than 37 nm, and the blackness is lower than that of standard sample No. 6. Large particles and low blackness. It is mainly used for coloring paint, ink, etc.

conductive carbon black

Carbon black with low or high resistance. It can give products conductive or antistatic effect. It is characterized by small particle size, large and rough specific surface area, high structure, clean surface (less compounds), etc. It can be applied to different products, such as conductive rubber, conductive plastic, radio components, etc. The main varieties are acetylene carbon black used in battery industry.

burning gas containing carbon black

It refers to the mixture of reaction gas and carbon black before carbon black is collected in the production of carbon black. It mainly contains carbon black, carbon monoxide, carbon dioxide, steam and other reactive gases. Carbon black can be obtained after separation.