Carbon black production process and process, what is the process flow of silica production?

Carbon black production process.

The main raw materials for the production of carbon black: coal tar, ethylene tar, anthracene oil, natural gas, blast furnace gas, etc.

The production principle of carbon black: carbon black generally refers to carbon elemental particles, which are generally due to insufficient combustion of organic matter, and the hydrogen element in them.

and oxygen is converted into water, while carbon is converted.

If the combustion is not sufficient, it will break away from the molecule and form carbon black. Carbon black is a black powdery substance formed by incomplete combustion or thermal cracking of hydrocarbons in the gas phase. Due to the different production processes, various products with different properties can be obtained through different process conditions.

Common production processes are: furnace method, spray method, lamp smoke method, tank method, drum method, gas mixing method, hot cracking method, acetylene.

method and plasma method, of which furnace method, spray method, lamp smoke method, tank method, drum method, gas mixing method are incomplete combustion methods, and thermal cracking method, acetylene method and plasma method are thermal cracking methods.

1) Furnace method: carbon black is generated by incomplete combustion or pyrolysis of natural gas or high aromatic hydrocarbon oil in the reaction furnace, which is called furnace black, which is the largest and most diverse type of carbon black. The significant difference between furnace black and groove black and hot cracking black is that the degree of melting or coalescence of its particles can be adjusted according to different uses.

2) Groove method: natural gas is used as the main raw material and channel steel is used as the flame contact surface to produce carbon black, which is called groove black. Compared with furnace black and hot cracking black, its particles are finer and have a specific surface area.

Larger. At the same time, due to the adoption of a specific mode of production.

Its surface is oxidized and contains more oxygen-containing functional groups.

and acidic. These carbon black particles have a low degree of coalescence. Because it contains more oxygen-containing functional groups, it can delay the vulcanization rate of rubber and increase the polyolefin.

It also gives the ink good fluidity and printability.

3) Thermal cracking method: using natural gas, coke oven gas or heavy liquid hydrocarbons as raw materials, under the condition of no oxygen and no flame, carbon black is generated by high-temperature pyrolysis, which is called hot cracking black. It is the lowest specific surface area of carbon black varieties, which basically exists as a single spherical particle, does not melt or coalesce into aggregates, and has very little oxygen content on its surface.

CABOT's production process is a furnace process.

Non-metallic ores and their extensions are mainly used as silicon sources, and silica is prepared by precipitation method. The key to its technology is to crystallize the silica.

and silicates into amorphous silica. The main raw materials are wollastonite, opal, halloysite and olivine.

Snake mosquito stone, kaolin.

Hard kaolin, coal gangue, fly ash, etc.

1. Kaolin or hard kaolin is used as raw material.

First crush kaolin or hard kaolin to 50 60 mesh, then roast at 500 600 high temperature for 2 hours, and then roast the roasted soil and industrial hydrochloric acid with a concentration of 30% by weight) batching, acid leaching at about 90 for 7 hours, neutralization, filtration, washing, drying to obtain silica, product quality in line with GB10507-89 standard; At the same time, the high-efficiency water purifier polyaluminum chloride is obtained.

2. Coal gangue or fly ash is used as raw material.

First crush the coal gangue or fly ash to a particle size of less than 120 mesh, and then in two steps:

Production of sodium silicate.

The crushed gangue or fly ash is mixed with soda ash.

Mix evenly according to the weight ratio of 1:50, and obtain sodium silicate after high temperature melting (1400 1500, 1 hour), water extraction and leaching (more than 100, 4 5 hours), filtration to remove impurities, and concentrate the filtrate to 45 46 Baumé.

To produce silica: sodium silicate is first formulated into sodium silicate.

solution (modulus, silica content of 4 10%), then acid leaching in 5 20% sulfuric acid (28 32, 8 16 hours), then heated to 80, stirred, adjusted pH value to 5 7, cured for 20 minutes, and then filtered and washed, dried, sorted, to obtain silica. The silica is active and has high purity.

Use. Due to a series of advantages of silica products, it can be widely used in many fields.

Silica is used in colored rubber products to replace carbon black for reinforcement to meet the needs of white or translucent products. At the same time, silica has super adhesion, tear resistance and heat resistance and anti-aging properties, so it can also replace part of carbon black in black rubber products to obtain high-quality rubber products, such as off-road tires, engineering tires, radial tires, etc.

In agricultural chemicals, such as pesticides, high-efficiency spraying fertilizers, etc., silica is used as a carrier or diluent, disintegrant, and the use of disintegrant in water-dispersible granules WDG can improve the suspension rate, and it is recommended to use the content of about 10%. Retains long-lasting effectiveness due to its ultra-high surface area.

It has extremely high adsorption power, easy to suspension, good affinity and chemical stability. Even in rain, washdown, and hot conditions, it remains unchanged for a long time.

1. Calcium carbide. Most of the carbon blacks produced as raw materials are conductive acetylene.

Carbon black, acetylene deficiency conductive carbon black. 2. Most of the carbon black produced from coal tar and anthracene oil is pigment carbon black and rubber carbon black. 3. The carbon black produced by heavy oil as raw material is mostly conductive carbon black, superconductive carbon black and special conductive carbon black.

4. The main purpose of natural gas is as fuel, which can make carbon black, chemicals and liquefied petroleum gas.

Propane produced from natural volbota.

Butane is an important raw material for modern industry. <

1. The carbon black produced by calcium carbide as raw material is mostly conductive acetylene carbon black and acetylene conductive carbon black.

2. Most of the carbon black produced from coal tar and anthracene oil is pigment carbon black and rubber carbon black.

3. The carbon black produced by heavy oil as raw material is mostly conductive carbon black and superconductive carbon black.

and special conductive carbon black.

4. The main use of natural gas is as fuel, which can be used to make carbon black, chemical silver and liquefied petroleum gas, and propane and butane produced by natural gas are important raw materials for modern industry.

5. Anthracene oil, with large viscosity and solid washing out at room temperature, is the raw material for the manufacture of coatings, electrodes, asphalt coke, carbon black, wood preservative oil and pesticides, etc., mainly used for extracting crude anthracene, acenaphthene, fluorene, phenanthrene and carbazole.

and other chemical raw materials.

The manufacturing method of fumed silica uses silicon tetrachloride, hydrogen, and air (in terms of oxygen) as raw materials, and continuously puts them into the hydrolysis furnace for hydrolysis reaction with a certain volume ratio, the reaction temperature is 1000 1100, and the reaction generates a primary granular type of silica Xiangzi; The reactants are aggregated into aggregated particles through the aggregator, and the finished product is separated by cyclone, two-stage air jet deacidification, boiling bed screening, and vacuum compression packaging. Kamiriku.

Carbon black, also known as carbon black, is an amorphous type of carbon. Light, loose and very fine black powder, with a very large surface area ranging from 10 3000 m2 g, is the product of incomplete combustion or thermal decomposition of carbon-containing substances (coal, natural gas, heavy oil, fuel oil, etc.) under the condition of insufficient air. Specific gravity.

Those made of natural gas are called "gas black", those made of oil are called "lamp black", and those made of acetylene are called "acetylene black". In addition, there are "groove black" and "furnace black". According to the performance of carbon black, there are "reinforcing carbon black", "conductive carbon black", "wear-resistant carbon black" and so on.

It can be used as a black dye for the manufacture of Chinese ink, ink, paint, etc., and is also used as a reinforcing agent for rubber.

In ancient times, people burned vegetable and vegetable oils, pine branches, and collected black ash from fire smoke to prepare ink and black pigments. This black ash, known as "Qi", is the earliest form of carbon black.

Blackness refers to the intensity of black presentation that carbon black has. When carbon black is colored, the blackness is mainly based on the absorption of light, and for a specific concentration of carbon black, the finer the carbon black, the higher the light absorption. In addition to the light absorption inside the carbon black, the blackness is also affected by the scattering of light with a brightening effect due to the geometry of the particle surface, which reduces the blackness.

As the particle size decreases, the degree of light scattering decreases. Only for very fine carbon black, increasing the concentration of carbon black can increase the blackness, and for coarse carbon black, the degree of light scattering with the dominant factor increases due to the increase of the number of carbon black, and the blackness decreases accordingly.

Carbon black can be used as pigment coloring, conductive filler, (wear-resistant, tensile resistant, reinforcing, tear-resistant, anti-oxidation filler), anti-static filler and other functions. The appearance is black powder or granules, with light specific gravity and no water absorption on the surface.

Carbon Black Industry" describes a lot of carbon black knowledge, applications, functions, characteristics and industry information, I hope to help you!

Thanks for adopting!

Hello answer, I have seen your question and am sorting out the answer, please wait a while Hello! Carbon black includes reinforcing carbon black, super wear-resistant black, pigmented carbon black, white carbon black, black carbon black, etc., and the specific uses are as follows:

1. According to the production process, there are wet carbon black, dry carbon black, and spray carbon black.

2. According to the production of raw materials, there are coal tar carbon black, natural gas carbon black, etc.

3. Rubber for slippers is used as raw material, and carbon black is added to the formula, and the functions of carbon black are mainly reinforcing, wear-resistant, filling, and pigmenting.

4. Used in the rubber tire industry, the main role of carbon black for special purposes is coloring, which is used in ink and coating industries.

Carbon black (also known as carbon black) is a quasi-graphite structural substance similar to a sphere colloidal particles formed by incomplete combustion or thermal cracking of hydrocarbon compounds (mainly petroleum derivatives), which exists in the form of aggregates, and is pure black powder or granular in appearance. The particle size, structure and surface activity of products vary greatly depending on the raw material and production process.

Carbon black is a state in which wood is heated and baked at high temperatures, removing some of the moisture and impurities, and retaining the form of organic matter with carbon. It has the burning properties of wood, but the heat released will be more concentrated and higher. The color is black, so it is called carbon black.

Used as a reinforcing agent and filler for rubber, its consumption is about half of rubber consumption, and carbon black for rubber accounts for 94 of the total carbon black, of which about 60 is used in tire manufacturing. It is also used as a colorant for inks, coatings and plastics, as well as an ultraviolet shielding agent for plastic products. It is also an important additive in many other products, such as electrodes, dry batteries, resistors, explosives, cosmetics and polishing pastes.

Summary. Carbon black is a black powder made from carbonaceous raw materials such as pyrolytic bituminous coal, petroleum coke, natural gas, etc. Here are the general steps for carbon black making:

1.Raw material preparation: choose the appropriate carbonaceous raw materials, such as bituminous coal, oil, natural gas, etc.

2.Pyrolysis: The raw material is put into a pyrolysis furnace and heated to a high temperature to decompose the raw material into carbon black and other gases.

3.Collection: After the gas produced is cooled, purified, etc., the carbon black is collected.

4.Refining: The collected carbon black is refined to remove impurities and unpyrolyzed raw material residues.

5.Drying: The refined carbon black is dried to achieve the desired moisture content.

6.Packaging: The dried carbon black is packaged for storage and transportation.

Carbon black is a black powder made from carbonaceous raw materials such as pyrolytic bituminous coal, petroleum coke, natural gas, etc. The following are the general steps for carbon black making:1

Raw material preparation: choose the appropriate carbonaceous raw materials, such as bituminous coal, oil, natural gas, etc. 2.

Pyrolysis: Put the raw materials into a cooking or pyrolysis furnace and heat them to high temperatures to decompose the raw materials into carbon black and other gases. 3.

Collection: After the gas produced is cooled, purified, etc., the carbon black is collected. 4.

Refining: The collected carbon black wheel tank is refined to remove impurities and unpyrolyzed raw material residues. 5.

Drying: The refined carbon black pure tung wu is dried to achieve the required moisture content. 6.

Packaging: The dried carbon black is packaged for storage and transportation.

It should be noted that the production process of carbon black needs to strictly control the temperature, atmosphere and other conditions to ensure product quality. At the same time, the production of carbon black will also produce a large amount of waste gas and wastewater, which needs to be treated and utilized to reduce the impact on the environment.