Xie Ying, a manufacturer of modified coal asphalt
I. Introduction. Coal pitch, as a by-product of coal tar processing, is a complex mixture. It has a variety of uses, including fields such as construction, road construction, industrial binders, and waterproofing. Understanding and correctly classifying coal pitch is essential for its application and production process. This article will introduce in detail the classification standards, common types, characteristics, uses, processing and treatment methods, as well as environmental protection and safety issues of coal asphalt.
Second, the concept, ** and use of coal asphalt.
Coal pitch is a residue after distillation of coal tar and is mainly composed of polycyclic aromatic hydrocarbons. It has a dark brown to black viscous liquid or semi-solid form with a peculiar odor. The ** of coal pitch is mainly the coking process of coal. In the coking process, coal undergoes high temperature and pressure to produce coke and coal tar. After further processing of coal tar, coal pitch with different properties can be obtained.
3. Classification criteria.
The classification of coal pitch is mainly based on its chemical composition, and coal pitch can be divided into acidic, neutral and alkaline coal pitch. According to viscosity and hardness, coal pitch can be divided into liquid, semi-solid, and solid coal pitch. According to the use, coal asphalt can be divided into road asphalt, industrial asphalt, waterproof asphalt, etc.
Fourth, common classifications.
1.Coarse coal asphalt: mainly used in the manufacture of waterproof materials, the sparseness in road engineering and the production of thermoelectric materials. Coarse coal pitch has a high viscosity, high hardness, and good wear resistance and durability.
2.Refined coal asphalt: Coal asphalt that has undergone further processing has lower viscosity and hardness, and is more suitable for the manufacture of chemical products such as coatings and dyes. The chemical composition of refined coal pitch is relatively pure and has high added value.
Fifth, the characteristics of each type.
1.Coarse coal asphalt: Due to its high viscosity and hardness, coarse coal asphalt has good wear resistance and durability. In road construction, it can be used as a pavement material to improve the service life of the pavement. However, coarse coal asphalt may face some challenges in the production and use process, such as difficult processing and high environmental protection requirements.
2.Refined coal asphalt: After further processing, the refined asphalt has lower viscosity and hardness, and is more suitable for the manufacture of coatings, dyes and other chemical products. Due to its pure chemical composition, refined coal pitch has high added value and market competitiveness. However, in the production and use of refined coal asphalt, Tongyan faces some challenges, such as high environmental protection requirements and high production costs.
6. Processing and processing methods.
Coarse coal pitch: In the production process, coarse coal pitch is usually separated from coal tar by high-temperature distillation. In order to improve its properties and increase its added value, coarse coal asphalt can be further treated and processed, such as desulfurization, denitrification and other operations. Refined coal asphalt: In order to obtain pure chemical composition and high value-added refined coal asphalt, more advanced separation technology and fine chemical methods can be used for processing. These methods include solvent extraction, distillation, etc. 7. Environmental protection and safety issues.
With the improvement of environmental awareness and the progress of technology, the environmental protection and safety issues of coal asphalt have attracted more and more attention. In the process of production and use, effective measures should be taken to reduce the generation and discharge of waste gas, waste water and waste residue. At the same time, safety supervision and standardized use should be strengthened to ensure that the safety and environmental protection requirements in the production and use process are met.
8. Development trends.
With the change of market demand and the development of technological innovation, the coal asphalt industry will develop in the direction of high efficiency and environmental protection in the future. On the one hand, improve product quality and added value through technological innovation and product upgrading;On the other hand, strengthen the integration and integrated development of the industrial chain to improve the overall competitiveness of the industry. At the same time, with the strengthening of environmental protection policies and the improvement of environmental awareness, sweat will pay more attention to the research and development and application of environmental protection and sustainable development related technologies in the future, which will also become one of the important trends of development.
9. Conclusion. This article introduces in detail the classification standards, common types, characteristics, uses, processing and treatment methods, environmental protection and safety issues, development trends, etc., hoping to help readers better understand and master the knowledge and technical requirements of coal asphalt, so as to provide reference and help for practical applications.
10. Coal asphalt field manufacturers.
Coal asphalt indicators are customized in Hebei Yaocarbon Chemical Technology Co., Ltd. for 15 years, focusing on the research and development of various index performance, national logistics lightning delivery, respect for quality, respect for the future!