Gypsum is an evaporite mineral most commonly found in layered sedimentary deposits in association with halite, anhydrite, sulfur, calcite, and dolomite. Gypsum (CaSO4.2H2O) is very similar to Anhydrite (CaSO4). The chemical difference is that gypsum contains two waters and anhydrite is without water. Gypsum is the most common sulfate mineral.
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Uses of Gypsum
Gypsum uses include: manufacture of wallboard, cement, plaster of Paris, soil conditioning, a hardening retarder in portland cement. Varieties of gypsum known as "satin spar" and "alabaster" are used for a variety of ornamental purposes; however, their low hardness limits their durability. However, different fineness gypsum powder has different use range.
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1. less than 250 mesh: the gypsum powder can be used for a variety of feed additives.
2. 250 mesh to 300 mesh: It can be used as raw materials for plastic, rubber factory, paint factory, the factory's and exterior paint coating.
3. 300 mesh to 400 mesh: the gypsum powder can be used in the manufacture, drainage pipes, and chemicals.
4. 400 mesh to 600 mesh: can be used for toothpaste paste, soap. It is worth to say that, if the gypsum powder is used in daily supplies, the health requirements for the gypsum grinding mill are more stringent.
5. 600 mesh to 800 mesh gypsum powder'It can be used for Rubber, plastic, cable, PVC.
6. 800 mesh to mesh: the gypsum powder can be used in PVC, PE, paint, paint, paper coating, and paper coating.
7.gypsum powder which have high purity and whiteness, non-toxic, odorless, fine oil low, low hardness and other characteristics, it can be used as calcium supplements.
Gypsum Powder Making Line Equipment with High Capacity
1)Controlling part: Full Automatic2)Annual capacity: 20,000 t~300,000t3) Fuel: Natural gas, coal, diesel, heavy oil4)Raw material: Natural gypsum rock (if adding some equipments, industrial by-product--desulfurization gypsum can be used), and in conformity with requirement of gypsum rock of over Grade 3 for making cementing material in JC/T 700-: Content of CaSO4·2H2O in raw material >70%.Gypsum Powder Quality Standard: GB/T -Gypsum Powder: 80-200meshComposition: Content of β-CaSO4·1/2H2O (mass fraction) in calcined gypsum should be not less than 75%.The Initial Setting Time: Shall Not Be Less Than 3 Minutes,The Final Setting Time: Shall Not Be More Than 20 MinutesGypsum Powder Plant(Nature Gypsum Rock)Gypsum Mine -0-210mm gypsum rock' Crushing 'bucket elevator 'silo ' Raymond mill 'screw conveyor ' bucket elevator 'material stablization silo 'electronic belt scale 'bucket elevator 'boiling kiln 'bucket elevator 'FU chain conveyor 'clinker silo 'packingGrinding systemAutomatic measuring systemCalcining systemOrganic heat carrier boilerAging &packing systemAutomatic control systemamong them,the Gypsum powder ebullition furnace used in the calcining system has following advantages:a; Small volume, large capacityb; Simple structure, un-damageablec; Compact structure, less land occupation, good de-dusting effectd; Less energy consumptione; Convenient to operate, easy to controlf; Good product quality, relatively ideal calcined gypsum phase composition, stable physical propertiesg; Low capital construction investment& operation costAnd the This furnace uses electric energy or chemical energy generated by solid, liquid or gaseous fuels as main heat source and heat conductive oil as heat transfer medium. It adopts pipeline to connect boiler and thermal equipment into closed system. It also adopts new saving type heating way--- adopting forced circulation to heat thermal equipment. Compared with other heating equipment, it has the following obvious advantages:a; Under low working pressure, it can obtain higher heating temperature. As a result, equipment investment cost is reduced and safety factor is intensified.b; Heat uniformly and stably, accurately control heating temperature to avoid part heating to heated product, effectively improving product quality.c; The heat conductive oil has no corrosion and scale, so investment for water treatment equipment which is necessary for heat transfer medium such as water or steam and pharmaceutical treatment cost is reduced.d; The freezing point of heat conductive oil is relatively low and can be used in cold winter. Even if it is solidified, there is no expansion and no danger for cracking equipment.e; One organic heat carrier boiler can supply heat for several users simultaneously with different temperatures. Thus the equipment investment for many heating equipments for many users is reduced.f; Compared with steam boiler, organic heat carrier furnace can save over 40% energy, for it adopts liquid transmission to transfer energy, and circulated heating, without condensation emission to loss heat. It is the ideal energy-saving and environment-protecting products, easy to operate, safe and reliable.
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