Coal asphalt manufacturer Shen Min
Today I will take you to understand the knowledge of coal asphalt.
1. Definitions and Characteristics.
Coal pitch, also known as coal tar pitch, is a complex mixture that is refined from coal tar. It is an intermediate product obtained during the processing of coal tar and usually appears as a solid or viscous liquid of black or dark brown. The properties of coal pitch vary depending on their specific chemical composition and molecular structure. Its melting point, viscosity, softening point, volatility, thermal stability and other properties are different due to the different production methods and processing conditions of coal tar.
2. Production and processing.
The production of coal pitch is mainly obtained by treating coal tar at high temperatures. This process typically includes steps such as dehydration, deslagging, and fractionation. During processing, the coal tar is heated to high temperatures, and then through condensation and fractionation, the coal pitch is separated from the other components. The resulting coal pitch is further processed and modulated and can be used for a variety of different purposes.
Third, the field of application.
Coal pitch has a wide range of applications in many fields. For example, in the construction industry, it can be used to make roofing waterproofing materials, anti-corrosion coatings, and asphalt concrete, among others. In the chemical industry, it can be used to produce a variety of chemicals such as benzene, toluene, xylene, etc. In addition, coal pitch can also be used to produce carbon black, electrode paste and graphite, among others.
Fourth, environmental impact.
The production and use of coal asphalt may have a certain impact on the environment. For example, some harmful substances in coal tar and coal pitch may be emitted into the atmosphere and water, causing certain harm to the environment and human health. Therefore, appropriate environmental protection measures need to be taken to reduce their impact on the environment.
5. Storage and transportation.
Coal pitch is a flammable substance, so special attention needs to be paid to safety when storing and transporting it. When storing, coal pitch should be stored in a cool, dry place, away from direct sunlight and high temperatures. When transporting, it is necessary to use special vehicles and containers, and ensure that the containers are well sealed to prevent leakage and fire accidents.
6. Chemical composition of coal pitch.
The chemical composition of coal pitch is very complex, mainly containing compounds such as polycyclic aromatic hydrocarbons, aliphatic compounds, phenols, and mercaptans. Among them, polycyclic aromatic hydrocarbons are the most important components of coal pitch, accounting for more than 60% of the total, and the content and proportion of these chemical components depend on the production method and processing conditions of coal tar.
7. Physical properties of coal pitch.
The physical properties of coal pitch mainly include color, state, melting point, viscosity, density, flash point, etc. Due to their complex composition, these properties are influenced by a variety of factors. For example, the color can vary from black to reddish-brown, the state can be solid or liquid, and the melting point and viscosity depend on conditions such as temperature and pressure. Understanding these physical properties is very important for the use and processing of coal pitch.
8. The use of coal pitch.
Coal pitch has a wide range of uses, mainly divided into two categories: industrial use and construction use. In terms of industrial use, it can be used to produce a variety of chemicals such as benzene, toluene, xylene, etc. In addition, it can also be used in the production of graphite electrodes, carbon black and various ceramic products. In terms of construction use, it can be used to make waterproofing materials, anti-corrosion coatings and asphalt concrete, etc. These uses make full use of the special properties and advantages of coal pitch.
9. Classification of coal asphalt.
According to different classification standards, coal pitch can be divided into different types. According to the different softening points, it can be divided into low-temperature coal asphalt, medium-temperature coal asphalt and high-temperature coal asphalt. In addition, it can also be divided into several other types depending on the production method and chemical composition. Different types of coal pitch have different properties and uses.