The sand dryer is mainly used for drying granular materials within a certain humidity range, such as yellow sand used in the dry powder mortar industry, and various specifications of sand used in the foundry industry. Blast furnace slag for building materials and the cement industry. Small particle size clay, used in the chemical industry for small particle materials that do not undergo chemical changes, is not afraid of high temperature and dust pollution. According to the requirements of different industries for the final moisture content of dried materials, the moisture content of dried materials can reach below 0.5%. The sand dryer can dry river sand, dry-mixed mortar, yellow sand, cement plant slag, clay, coal gangue, mixture, fly ash, gypsum, iron powder, and other raw materials. It is widely used in building materials, the chemical industry, casting, etc., and other industries.

Working principle of sand dryer

The sand is sent to the hopper by the belt conveyor or bucket elevator, and then enters the feeding end through the feeding pipe of the feeding machine of the hopper. The inclination of the feeding pipe should be greater than the natural inclination of the material so that the material can flow into the sand dryer (yellow sand dryer) smoothly. The drum of the dryer is a rotating drum that is slightly inclined to the horizontal line. The material is fed from the higher end, and the heat carrier enters from the lower end, and contacts with the material in countercurrent, or the heat carrier and the material flow into the cylinder together. With the rotation of the cylinder, the material moves to the lower end under the action of gravity. When the wet material moves forward in the barrel, it receives heat from the heat carrier directly or indirectly, so that the wet material can be dried, and is sent out from the discharge end through a belt conveyor or a screw conveyor. There is a lifting plate on the inner wall of the sand dryer (yellow sand dryer), its function is to lift up the material and scatter it down, so as to increase the contact surface between the material and the airflow, and to improve the drying rate and promote the material to advance. The heat carrier is generally divided into hot air, flue gas, etc. After the heat carrier passes through the dryer, a cyclone dust collector is generally required to capture the material in the gas. If you need to further reduce the dust load in the end gas, it should pass through the bag filter or wet dust collector and then discharge it.

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