The Operation of Sand Washer

Manufactured sand has a variety of uses. Construction industry is the biggest customer of manufactured sand, closely followed by glass making industry and chemical companies.

The raw materials are generally excavated from underground or dunes and beaches using hauling machines. Then sand is roughly prepared through primary crushing, washing and selecting. The selecting procedures include the removal of heavy mineral impurities and electrostatic screen. After initial preparation, the sand is poured into a cone crusher to be processed into smaller particles. Marked by high durability and excellent crushing performance, cone crushers are well adapted to meet a number of requirements. Generally speaking, a cone crusher consists of a fixed crushing jaw and a moveable jaw. Driven by a toggle plate system, the two jaws constitute a wedge-shaped crushing zone so that sand and other tiny impurities can be crushed in the zone in a centrifugal way.

Then the semi-product is transferred to a sand washer. A sand washer is typically composed of a chassis, motors, sedimentation tanks, rotary bucket elevators, and gears. The chassis guarantees high strength and flexibility and can withstand great pressures while the rotary bucket elevators are used as storage areas for the washed sand. After sand has been separated, it is transferred by gear-controlled impellers into sedimentation tanks. Some popular sand washers are equipped with an adjustable wedge system which is maintenance-free and powerful. Toggle plates exert forces on all sides and adapt to the movement of sand. A special lubrication mechanism ensures that the machine can work efficiently all the time. Thus the maintenance cost is drastically reduced and the time for sand processing is significantly shortened.

If operated in a correct way, a sand washer can turn low-value dust into quality products that can be used in the making of concrete and asphalt. In this way sand manufacturers can boost their profits easily and ensure that the customers will get high-quality sand with a stable grading curve. Therefore, the operation of sand washer requires professional personnel and training in order to reduce production costs and eliminate possible hazards to both workers and the surrounding environment. However, it is noted that operation of sand washers varies according to different grades and specifications of the produces as well as the exact requirements of customers.

There are several aspects in operating a sand washer that should be paid attention to. Firstly, the height of sand poured into a sand washer should not exceed eight percent of its processing capacity or the washer chamber. And the diameters of sand should be less than sixty percent of the inlet width so as to ensure that the sand washer will not break down while processing sand. Secondly, tiny yet sharp metal pieces might cause damage to sand washers so they should be avoided by appropriately screening in the preparation stage.

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