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1. Brief Introduction of spiral sand classifier
Our company produce four types of classifier which are high weir single screw, high weir double screw, submerged single screw and submerged double scrw. The classifier is widely used in mineral beneficiation plant to work together with ball mill, forming a closed circuit to recycle distributary sands. And it is also used for grading mineral sand and fine silt in gravity separation, classifying in metal processing, desliming and dehydration in ore washing process. It is featured by simple structure, reliable working and easy operation.
 
2.Working Principle of spiral sand classifier  
Classifier is mainly consists of driver, screw, trough, lifting device, bottom-support (bearing bush) and the discharging valve. The base adopts channel steel material, and the frame is welded with steel plate. Besides, the water input and spindle head of the screwing shaft ues cast iron, making them durable and wear-resisting. Moreover, the lifting device has two types: motor-driven and hand-driven.
Classifier is a kind of mechanical classification equipment, which adopts this principle: different size of solid particle determines different specific weight, so in the liquid, the fall velocity of them is different too. The fine ore particle will float over the water, and then be overflowed out. On the contrary, the coarse ore particle will sink in the trough ,and then be pushed to the upper by the screw. Moreover, it can classify the materials been grinded in the mill, and then filter them, use the flight to screw the coarse ore particle into the feeding opening and overflow the fine material out from the tube.

a. Pre-sale services
 
1. Select proper equipment model;
2. Design and manufacture products according to clients' special requirement;
3. Arrange for visiting our factory, assist them to handle relative procedure, such as vis.
 
b. Services during the sale
 
1. Make sure goods prepared within delivery time;
2. Pre-check and accept products ahead of delivery;
3. Prepare documents required to help customer pass customs clearance.
4. Help clients to make Project evaluation and feasibility analysis and draft solving plans.
 
c. After-sale services
 
1. Assist clients to prepare for the first construction scheme;
2. Install, debug and examine the equipment;
3. Train technical personnel the first-line operators;
4. Provide technical exchanging
5. Offer spare parts at a best price for long term.