Coal pitch binder is a special material made from coal tar asphalt that has been processed. It has high adhesion and adhesion, is able to bond various materials together, and has good sealing properties and corrosion resistance. In this paper, the composition, characteristics, preparation methods and application fields of coal asphalt binder will be introduced in detail.
1. Ingredients. The main component of coal pitch binder is coal tar asphalt, which is generated by coal tar through oxidation, condensation, pyrolysis and other reaction processes. Coal tar bitumen contains a variety of chemicals, the most important of which are organic compounds such as phenols, naphthalene, anthracene, benzopyrene, etc. These compounds play a vital role in the preparation of coal pitch binders.
2. Features. Coal asphalt binder has the following characteristics:
1.High adhesion: Ability to bond a variety of materials together with strong adhesion.
2.Good sealing performance: It can effectively seal various materials and prevent the leakage of gases and liquids.
3.Corrosion resistance: It has good corrosion resistance and can resist the corrosion of various chemicals.
4.Abrasion resistance: It has good wear resistance and can resist friction and wear.
5.Low temperature performance: It can still maintain good performance in low temperature environment.
3. Preparation method.
The preparation method of coal asphalt binder mainly includes the following steps:
1.Oxidation: Coal tar is oxidized at a certain temperature and pressure to generate oxidized asphalt.
2.Condensation: A catalyst is added to oxidized bitumen to cause it to undergo a condensation reaction to produce low molecular weight bitumen.
3.Pyrolysis: Pyrolysis of low-molecular-weight bitumen to generate coal asphalt.
4.Add additives: Various additives are added to coal pitch to improve its performance.
5.Grinding: The additives and coal pitch mixture are ground to improve their viscosity and adhesion.
Fourth, the field of application.
Coal asphalt binders are widely used in the following fields:
1.Construction engineering: It is used for the bonding and sealing of concrete structural parts, which can effectively improve the waterproof performance and durability of buildings.
2.Automobile manufacturing: It is used for bonding and sealing of automotive parts, which can improve the safety and comfort of automobiles.
3.Pipeline anti-corrosion: anti-corrosion coating and insulation layer for pipelines, which can improve the service life and safety of pipelines.
4.Machinery manufacturing: It is used for the bonding and sealing of various mechanical parts, which can improve the accuracy and service life of machinery.
5.Electronics industry: used for bonding and sealing electronic components, which can improve the quality and stability of electronic products.
6.Petrochemical: It is used for bonding and sealing petrochemical equipment, pipelines and containers to improve the safety and reliability of equipment.
7.Aerospace: It is used for bonding and sealing aerospace parts and components, which can improve the performance and service life of aerospace vehicles.
8.Other fields: such as shipbuilding, railway transportation, agricultural machinery and other fields are also widely used.
In a word, as a special material, coal asphalt binder has a wide range of application fields and good performance characteristics. Although its preparation method is relatively complex, with the continuous progress of technology and the continuous expansion of application fields, it is believed that its production cost will gradually decrease, and its application range will become more and more extensive.