Do You Know the Working Principle of Sand Dryer

Topics: Portland cement, Cement, Concrete Pages: 2 (398 words) Published: July 1, 2014
According to different requirements on moisture content of dried materials in different industries, moisture content of dried materials can be lower than 0.5%. Sand dryer is mainly applied to drying river sand, dry-mixed mortar, yellow sand, cement clinker, clay, coal gangue, mixtures, coal ash, gypsum, iron powder and other raw materials, widely used in building materials, chemical industry, casting industry and other industries.

Sand dryer working principle:

Sand sent to the hopper by the belt conveyer and bucket elevator, and then through the hopper feeder into the feeding pipe, thereby entering the feeding end. The feeding pipe inclination is greater than the natural angle of materials, so that material flows into the sand dryer. Dryer cylinder is a rotating cylinder that have a certain inclination with horizontal line. Material from the high-end to join, heat carrier from the low-end entry, countercurrent contact with material, also have heat carrier and material flow into the cylinder together. With the rotating cylinder materials by gravity run to the lower end. Wet material in the cylinder body to move forward, heat by heat carrier directly or indirectly, so that the wet material to be dried, then at the discharge end through a belt or a screw conveyor send out. In sand dryer inner wall of the cylinder is provided with a copy board. Its role is to bring up material then down, increasing the contract surface of material and gas flow, in order to improve the drying rate and promote material progress. Heat carrier are generally divided into hot air, flue gas. Heat carrier through the dryer, then the material in the gas was collected by cyclone dust collector. If need to further reduce the exhaust gas dust content,also should dust by the bag dust collector.

Sand dryer also can be called quartz sand drying machine, river sand dryer or sand rotary dryer, is mainly used for drying particle materials with certain humidity, such as all kinds of sand in...
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