Use of gypsum and technical and economic indicators
Gypsum In China's modern industry, 93% of annual production is used as a cement retarder. The addition of gypsum to the cement can make the setting time reasonable, avoid the phenomenon of rapid setting, increase the strength and frost resistance, and reduce the shrinkage rate, but the amount of the mixture generally does not exceed 3.5%. The construction products such as plates and wall members made of gypsum have become a fast-developing one with light weight, shock resistance, sound insulation, heat insulation, flame retardant, good decorative performance, convenient and mechanized production, and improved construction speed. Demand for new building materials is growing. Gypsum is used as building cementing material for building mortar and insulating concrete, making roofing, tiles and ceilings. Gypsum is used as a filler in the paper, paint, rubber, chemical, plastic, and textile industries. Sulfur-deficient areas can be used to make sulfuric acid, but it is not economical. The use of gypsum for calcium and sulphur nutrients in agriculture can increase crop yields. In addition, gypsum is widely used in medicine, food, production models and art.
Building materials industry As a cement setting agent and composite mineralizer, it is especially suitable for the production of concrete expansion agent, low alkalinity special cement, anhydrite cementing material and its products.
The chemical industry can produce cement in parallel with sulfuric acid for the production of rubber, plastics and coatings.
Agricultural application: It can improve soil and adjust pH; as a feed additive, it can supplement sulfur and calcium nutrients.
Different uses have different requirements on the type and content of gypsum. The classification and use of gypsum are shown in the following table. Different uses have different restrictions on impurities in gypsum ore, such as K, Na, Cl content of gypsum board; content of As, S, Se, Cr, F, Cl, MgCl 2 by medical and food gypsum; , medical and food have restrictions on the content of radioactive elements in gypsum, which can be determined in specific indicators.
Vertical type air handling unit
Air flow 1,000m3/h-50,000m3/h,Coil type 4rows/6rows/8rows
AMRTA air handling unit mainly constructed with filter, heat exchanger, fan motor, fan blower and other main components.
Characteristics:
1.Air handing unit applies colorful steel and galvanized panel as its interior and exterior panel. Inner stuff is the high density polyurethane foam,double pillar and tenon structure that ensures the strength of the unit and low air leakage.
2.High efficiency and low resistance nylon filter that reduce the power consumption obviously. Easy cleaning and simple operation; at the same time, higher level panel filter is optional too.
3.Coil applies pure and seamless copper tube and hydrophilic aluminum fin. Copper tube is under 12MPa water pressure expanding that can adapt to all kind of high pressure and no leakage, as well as ensure the lowest contact thermal resistance and highest heat transfer efficiency.
4.All fans in the unit are selected by professional software to ensure the best condition. Minimize the air volume and air pressure loose after meeting with the customer's requirements. Also ensure the good airflow and reduce the air duct noise.
Vertical Type Air Handling Unit
Vertical Type Air Handling Unit,Air Handling Unit Size Calculation,Air Handling Unit Catalogue Carrier,Horizontal Vertical Type Air Handling Unit
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