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China Spiral Classifier for Ore Washing - Reliable Sieving & Grading Machine from Leading Suppliers and Factory

The spiral classifier is a highly efficient sieving and grading machine widely utilized in China's mineral beneficiation processes. It functions effectively in the grinding circuit for pre-classification and inspection classification, as well as in ore washing and desliming operations. Available in four variants—high weir single screw, high weir double screw, submerged single screw, and submerged double screw—this classifier offers several advantages, including a simple structure, reliable operation, and user-friendly maintenance. Our factory specializes in manufacturing high-quality spiral classifiers tailored to the needs of various industries. The classifier comprises key components such as a transmission device, screw body, tank body, lifting mechanism, lower support or bearing bush, and an ore discharge valve. Partner with trusted suppliers in China to enhance your mineral processing efficiency with our premium spiral classifiers

Product Detail

Working Principle

The spiral classifier is based on the principle that solid particles have different sizes and specific gravity, therefore they have different settling speeds in the liquid. Fine ore particles float in the water and overflow, while coarse ore particles sink to the bottom of the tank. It is a kind of mechanical classification equipment that push stuff to the upper part by a spiral and discharge materials. It can grade the material and powder ground out of the mill to filtration, and then screw the coarse material into the mill feed port by using the spiral slice spiral disc to discharge the filtered fine material from the overflow pipe.

The base of the machine is made of channel steel and the body is welded with steel plate. The water head, shaft head of screw shaft adopt pig iron sleeve which is wear-resistant and durable. The lifting devices has two types, manual control and electric control.

Main Technical Parameters

Model		FLG-508	FLG-750	FLG-915	FLG-1200	FLG-1500		FLG-2000		2FLG-1200	2FLG-1500	2FLG-2000
Diameter of screw (mm)		508	750	915	1200	1500		2000		1200	1500	2000
Speed of screw (r/min)		8-12	6-10	5-8	5-7		2.5-6		3.5-5.5	5-7	4-6	3.6-4.5
Capacity (t/d)	Returned	140-260	250-570	415-1000	1165-630		1830-2195		3890-5940	2340-3200	2280-5480	7780-11880
Capacity (t/d)	Overflow	32	65	110	155		235		400	310	470	800
Slop(º)		14-18	14-18	14-18	17		17		17	12	12	12
Driving motor	Model	Y90L-6	Y132S-6	Y132M2-6	Y132M2-6		Y160M-6		Y160L-4	Y132M2-6	Y160M-6	Y160L-6
Driving motor	Power (kw)	4	5.5	7.5	7.5		11		15	7.5x2	11x2	15x2
Lifting motor	Model	/	/	/	Y90L-4		Y100L-4		Y132S-6	Y100L-4	Y100L-4	Y100L-4
Lifting motor	Power (kw)	/	/	/	1.5		2.2		3	2.2	2.2	3
Dimension (LxWxH)		5340 x 934 x 1274	6270 x 1267 x 1584	7561 x 1560 x 2250	7600 x 1560 x 2250		10200 x 1976 x 4080		10788 x 2524 x 4486	8230 x 2728 x 3110	10410 x 3392 x 4070	10788 x 4595 x 4486
Weight (t)		2.8	3.8	4.5	7.0		9.5		16.9	15.8	21.1	36.4

Frequently Asked Questions

What is the working principle of the spiral classifier?

It operates on the principle that solid particles of different sizes and specific gravities have different settling velocities in a liquid. Fine particles float and overflow, while coarse particles sink to the bottom and are pushed to the upper end by a spiral for discharge.

What materials are used to construct the machine body and parts?

The base of the machine is constructed from channel steel, and the body is welded with robust steel plate. Additionally, the water head and shaft head of the screw shaft are fitted with durable, wear-resistant pig iron sleeves.

What types of lifting devices are available for the spiral classifier?

The machine features two options for lifting devices: manual control for simple adjustments and electric control for automated, effortless operation.

How does the spiral classifier return coarse materials for re-grinding?

It utilizes its integrated spiral slice and spiral disc to screw the filtered, heavy coarse materials directly back into the feed port of the grinding mill.

Where are the filtered fine materials discharged from?

The filtered, fine ore particles float to the top of the water and are automatically discharged from the machine's integrated overflow pipe.