Common calcination technology of gypsum calcination equipment

Common calcination technology of gypsum calcination equipment?

Internally heated tubular cement rotary kiln: the rotary kiln is equipped with many connecting pipes, which are filled with hot steam or high temperature heat transfer oil. The raw materials are exposed to heat in the furnace. The materials stay in the furnace of the gypsum calcination equipment for a long time, which belongs to ultra-low temperature calcination. The product quality is balanced and stable.

Continuous frying pan: it is a straight round pan with a cross fire tube. The pan surface, bottom pan and fire tube transfer heat to the dihydrate gypsum in the pan, and it displays the air flow transmission by mixing the steam formed by mechanical mixing and gypsum dehydration and mixing the hot exhaust gas of the circulation system. In this case, dihydrate gypsum is dehydrated to become semi hydrate gypsum, and the continuous feeding depends on the basic principle of overflow. The temperature of raw materials in the pot is about 150 ℃, and the raw materials are calcined for 1~1.5 hours.

It belongs to ultra-low temperature slow speed forging method. Continuous cooking pot calcined plaster is a key technology all over the world, with stable production and manufacturing, easy practical operation, and guaranteed product quality balance. It is suitable for calcining powdered gypsum. If it is used for industrial production of gypsum, a cyclone dryer is required to remove more than 10% of the dispersed water.

Fluidized bed furnace: a column type straight cylindrical vessel is equipped with a steam blanket at the bottom. During the operation, the cyclone is fed into the material layer from the bottom in a uniform manner. The bed layer is equipped with many heating tubes. The substances in the tubes are saturated water vapor or high-temperature heat transfer oil. After the gypsum particles enter the furnace, they are heated in a flowing state. At the same time, the heat output is transmitted to the caulking gypsum in the tubes in accordance with the wall thickness, so that it can be burned, dried and dissolved

Cyclone calcination means that the hot air directly contacts with the granular material, and the dihydrate gypsum is quickly dehydrated to form hemihydrate gypsum. This kind of method is effective in hot application, with compact machinery and equipment, simple application and high effect. It is suitable for pure natural gypsum and gypsum calcination equipment

Direct heating cement rotary kiln: the thermal medium directly contacts with the raw materials of gypsum to make it dehydrated and become semi hydrated gypsum or anhydrite. Gypsum rotates and moves forward in a small angle of view slanted cylinder. The hot material is in the same direction or opposite direction of exercise. During the whole operation process, the gypsum is dehydrated. Continuous feeding and feeding means continuous work. Because direct firing is more efficient than external firing cement rotary kiln, and natural materials can use gas, oil and coal.