Asbestos cement pipes, asbestos cement tiles and asbestos cement sheets and various kinds of asbestos composite panels, etc..
The amount of asbestos used in these products accounts for more than 75% of the total consumption of asbestos. With the development of the coating industry, various kinds of colored asbestos tiles and colored asbestos boards will provide better quality materials for the construction industry. Asbestos sheets are used for thermal and acoustic insulation wall panels of buildings. The production of asbestos cement products is generally used in the hard structure of the needle cotton, the level requirements are not very high, 4 to 5 levels of cotton can meet the use of requirements.
The production methods of asbestos-cement products are round net copying method, Maniani molding method, extrusion method, injection method and dry method.
1, round net copying method (Hatschek process) is a more widely used method. The process is asbestos cement slurry diluted with water to become a certain concentration of suspension, filtered by the circular mesh cylinder dehydration and transferred to a non-terminated cloth to form a thin layer of material, and then through the vacuum dewatering and pressurized compact, so that the thin layer of material adhesion to become a certain thickness of the material billet for processing into a variety of products such as corrugated tiles, flat panels and tubes, etc..
2, Magnani molding method (Magnani process) is a thicker asbestos cement slurry or asbestos cement suspension directly into the molding machine on the burlap, vacuum dewatering and pressure compaction, made of asbestos cement tiles or pressure pipe. The asbestos utilization rate of asbestos cement products manufactured by Maniani molding method, extrusion method, injection method or dry method is not as high as that of circular net copying method.
Expanded Information
Advantages:
1, asbestos cement products have high flexural and tensile strength, and can be made into thin-walled products;
2, but also corrosion-resistant, impermeable to water, good frost and heat resistance, as well as easy to mechanical processing.
Disadvantage: is the impact strength is low.
Baidu Encyclopedia - Asbestos