Judging the use of coal asphalt based on the test results requires a comprehensive analysis of multiple indicators.
Here are some of the main criteria:
1.Chemical composition: The chemical composition of coal pitch is complex, including a variety of aromatic hydrocarbons, aliphatic hydrocarbons, carbohydrates, proteins, and inorganic substances. Different chemical compositions determine the specific properties and uses of coal pitch. For example, coal pitch containing a certain amount of aliphatic cyclic hydrocarbons and aromatic hydrocarbons has good anti-corrosion properties and is suitable for anti-corrosion treatment of pipelines, storage tanks, bridges and other facilities.
2.Viscosity: Coal pitch has a certain viscosity at room temperature, and the viscosity will gradually decrease as the temperature increases. According to the viscosity index of coal asphalt, its fluidity, consistency and other characteristics can be judged, so as to determine whether it is suitable for road construction materials, anti-corrosion materials, insulation materials, etc.
3.Softening point: The softening point is the temperature at which the coal pitch loses its fluidity under specific conditions. Different types of coal pitch have different softening points. By measuring the softening point, it is possible to judge the heat resistance, weather resistance and other characteristics of coal pitch, so as to determine whether it is suitable for high-temperature processing and casting. For example, coal pitch with a high softening point can be used to make sealing materials for roads, such as asphalt concrete, asphalt mortar, etc.
4.Ash and volatile: Ash is the non-combustible part of coal pitch, mainly including minerals, ash and other inorganic substances. Volatiles are the total amount of water vapor, organic matter, and other volatile substances produced during the heating process of coal pitch. By measuring the ash and volatile content, it is possible to understand the purity, impurity content, thermal and chemical stability and other characteristics of coal pitch, so as to determine whether it is suitable for a specific application.
In summary, judging the use of coal pitch based on the test results requires a comprehensive consideration of multiple indicators. By analyzing the chemical composition, viscosity, softening point, ash and volatile matter, the properties and uses of coal pitch can be understood, which provides an important basis for production and use. It should be noted that the specific judgment method also needs to be comprehensively considered in combination with the actual situation and application field.