Coal asphalt manufacturer Chaisha
First, the concept of coal asphalt and **.
Coal pitch, also known as coal tar asphalt, is a component separated from the coal tar processing process and is the main component of coal tar. Coal pitch ** is used in the high-temperature dry distillation of coal, the specific process is to heat the coal to about 900, after pyrolysis and a series of complex chemical reactions, to obtain the liquid product - coal tar. Further processing and processing separates various components from coal tar, and finally three major categories of products are obtained: coal gas, medium temperature asphalt and coal tar.
2. Classification standards and methods of coal asphalt.
According to different classification standards, coal pitch can be divided into many types. Common classification methods are as follows:
1. Classification according to softening point: According to different softening points, coal asphalt can be divided into low-temperature asphalt, medium-temperature asphalt and high-temperature asphalt. The softening point of low-temperature asphalt is low, generally below 45;The softening point of medium-temperature asphalt is between 45 -115, and the softening point of high-temperature asphalt is above 115.
2. Classification by use: According to different uses, coal asphalt can be divided into road asphalt, construction asphalt, anticorrosive asphalt, etc. Road asphalt is mainly used for road paving;Construction asphalt is used for building waterproofing, anti-corrosion, etc.;Anticorrosive asphalt is used for metal anticorrosive treatment.
3. Classification according to processing methods: According to different processing methods, coal asphalt can be divided into solvent deoiled asphalt, oxidized asphalt, distilled asphalt, etc. Solvent deoiling asphalt is to separate some components of coal tar through solvent to obtain purer asphalt;Oxidized asphalt is to react coal asphalt with oxidant to oxidize and decompose some components and improve the quality of asphaltDistilled bitumen separates the light components in the coal tar through the distillation method, leaving the heavy components, that is, coal pitch.
3. Characteristics and application fields of different types of coal asphalt.
Different types of coal pitch have different characteristics and application fields due to their different chemical composition and properties. For example:
1. Low-temperature asphalt: It has the characteristics of low viscosity, good fluidity and strong permeability, and is mainly used for anti-corrosion coatings, inks and other products.
2. Medium temperature asphalt: It has good heat resistance, water resistance and corrosion resistance, and is mainly used in road paving, building waterproofing and other fields.
3. High-temperature asphalt: It has a high softening point and heat resistance, and is mainly used for anti-corrosion coatings, sealing materials and other products in high-temperature environments.
4. Solvent deoiled asphalt: It has good adhesion and water resistance, and is mainly used to make adhesives, waterproof materials and other products.
5. Oxidized asphalt: It has a high degree of oxidation and cohesiveness, and is mainly used to make anticorrosive coatings, adhesives and other products.
6. Distilled asphalt: It has good heat resistance and stability, and is mainly used to make waterproof materials, sealing materials and other products.