Coal asphalt manufacturer Zhang Yu
1. Overview. Asphalt is a black viscous substance, which is obtained by physicochemical treatment. It is widely used in areas such as pavement, roofing, and groundwater protection. This article will introduce the production process of asphalt.
Second, the selection of raw materials.
The raw material of bitumen is the fraction of petroleum, which mainly includes light oil and heavy oil. The paraffin content in light oil is high, so it is not suitable as a raw material for asphalt. Heavy oil contains a certain amount of asphalt, but the temperature is too high to decompose and affect the quality of asphalt. Therefore, the production of asphalt requires the selection of the right ratio of light and heavy oil to achieve the best production effect.
3. Physical and chemical treatment.
1.Heating of raw materials.
Once the raw material has been selected, it needs to be heated to a certain temperature. Heating helps to break down impurities and moisture in the raw material and allows it to flow in preparation for subsequent processing.
2.Gas perturbation and distillation.
The heated raw material enters the still, where it is subjected to gas disturbance and begins distillation. During the distillation process, bitumen and other fractions are separated and collected separately by a separation plant. This step is mainly based on the physicochemical separation of various substances according to their different boiling points.
3.Vacuum separation.
Bitumen still contains a small amount of impurities during the distillation process, which needs to be removed by vacuum separation. Vacuum separation is the use of the principle that the boiling point of the substance changes with the change of pressure, and the asphalt is heated and vacuumed to volatilize the impurities in the asphalt, so as to purify the asphalt.
Fourth, the preparation of asphalt.
The asphalt after vacuum separation contains a certain amount of asphalt quality index, but its properties are not fully in line with the market demand. Therefore, it needs to be reprocessed, heated and refined to meet the standards required by the market, and finally prepared into asphalt products.
V. Conclusion. The production process of bitumen is a series of physical and chemical treatment steps, including the selection of raw materials, physicochemical treatment, and the preparation of the final product. This article covers the core words of several Q&A queries and gives you a detailed introduction to the asphalt production process.