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High-Efficiency Single Spiral Classifier for Mineral Size Grading

High-Efficiency Spiral Classifier for Mineral Grading


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【Capacity】21-1785 T/D
【Spiral Diameter】500-3000 mm
【Type】High weir type single & double screw, the sinking type with single &double screw

Single Spiral Classifier Double Spiral Classifier Spiral Sand Washer FG Spiral Classifier Acid-Resistant Spiral Classifier

Work Principle

Advantages

Parameters

Successful Cases

FAQ

Work Principle

The High-Efficiency Spiral Classifier excels in separating ore particles by size and density, serving as a critical tool in mineral processing lines. Widely used in conjunction with ball mills, it ensures precise grading of sands, slimes, and concentrates, with a processing capacity of 50-300 t/h.

Gravity-Driven Separation

Material enters the spiral trough as a slurry. Under gravity, centrifugal force, and water flow, particles stratify vertically: high-density particles settle to the bottom, while low-density ones rise to the surface .

Three-Stage Classification

• Stratification: Particles separate by density, with heavy minerals descending.

• Lateral Segregation: High-density particles migrate to the trough’s inner edge, low-density ones to the outer edge.

• Equilibrium Separation: Particles stabilize at distinct radii, with overflows (fines) and underflows (coarses) collected separately .

Spiral Rotation

A slow-rotating spiral (5-15 RPM) agitates the slurry, preventing clogging and ensuring uniform particle distribution across the trough’s parabolic cross-section.

Product Advantages

Precise Particle Control

Achieves grading accuracy of ±5 mesh, critical for optimizing downstream processes like flotation and filtration. Its adjustable overflow weir allows fine-tuning of particle size.

Energy & Water Efficiency

Consumes 40% less power than conventional classifiers, thanks to its gravity-based design. Water recycling systems reduce consumption to 5-8 m³/t of ore processed.

Low Maintenance

The spiral shaft and trough are lined with wear-resistant rubber, extending service life to 15,000+ hours. Sealed bearings eliminate lubrication needs in dusty environments.

Technical Parameters

Spiral Classifier
Type	Model	Spiral Diameter	Spiral Rotation Speed	Tank		Inclination Angle	Capacity		Power (Kw)		Weight kg
Type	Model	(mm)	(r/min)	L (mm)	W (mm)	（°'）	Overflow (m3)	Sand Return (m3)	Driving Motor	Lifting Motor	Weight kg
High Weir Type Single Spiral	FLG-5	500	8.5-11.5	4500	555	14°-18°30'	32	143-261	1.1	/	1600
	FLG-7	750	4.5-9.9	5500	830	14°-18°30'	65	256-564	3	/	2900
	FLG-10	1000	3.5-7.6	6500	1112	14°-18°30'	85	473-1026	5.5	/	4400
	FLG-12	1200	6	6500	1372	14°-18°30'	155	1170-1600	5.5	1.5	8800
	FLG-15	1500	2.5-6	8265	1664	14°-18°30'	235	1140-2740	7.5	2.2	11680
	FLG-20	2000	3.6-5.5	8400	2200	14°-18°30'	400	3890-5940	11/15	3	20450
	FLG-24	2400	3.64	9130	2600	14°-18°30'	580	6800	15	3	25650
	FLG-30	3000	3.2	12500	3200	14°-18°30'	890	11650	22	4	37000
High Weir Type Double Spiral	2FLG-12	1200	6	6500	2600	14°-18°30'	310	2340-3200	5.5×2	1.5×2	15840
	2FLG-15	1500	2.5-6	8250	3200	14°-18°30'	470	2280-5480	7.2×2	2.2×2	22100
	2FLG-20	2000	3.6-5.5	8400	4280	14°-18°30'	800	7780-11880	11×2	3×2	36400
	2FLG-20	2000	3.6-5.5	8400	4280	14°-18°30'	800	7780-11880	15×2	3×2	36400
	2FLG-24	2400	3.67	9130	5100	14°-18°30'	1160	13600	30	3×2	45874
	2FLG-30	3000	3.2	12500	6300	14°-18°30'	1785	23300	45	4×2	73030
The technical parameters provided are for reference only. Final product performance shall be subject to the official technical specifications.

Spiral Classifier
Type	Model	Spiral Diameter	Spiral Rotation Speed	Tank		Inclination Angle	Capacity		Power (Kw)		Weight kg
Type	Model	(mm)	(r/min)	L (mm)	W (mm)	（°'）	Overflow (m3)	Sand Return (m3)	Driving Motor	Lifting Motor	Weight kg
Submersion Type Single Spiral	FLG-10	1000	6-7.4	8400	1112	14°-18°30'	75	473-1026	5.5	--	6000
	FLG-12	1200	5-7	8400	1372	14°-18°30'	120	1170-1630	7.5	2.2	11020
	FLG-15	1500	2.5-6	10500	1664	14°-18°30'	185	1140-2740	7.5	2.2	15340
	FLG-20	2000	3.6-5.5	12900	2220	14°-18°30'	320	3890-5940	45976	3	29060
	FLG-24	2400	3.64	11130	2600	14°-18°30'	455	6800	18.5	4	37267
	FLG-30	3000	3.2	14300	3200	14°-18°30'	705	11650	30	4	43500
Submersion Type Double Spiral	2FLG-12	1200	6	8400	2600	14°-18°30'	240	1770-2800	7.5×2	1.5×2	19610
	2FLG-15	1500	2.5-6	10500	3200	14°-18°30'	370	2280-5480	7.5×2	2.2×2	27450
	2FLG-20	2000	3.6-5.5	12900	4280	14°-18°30'	640	7780-11880	11×2	3×2	50000
	2FLG-20	2000	3.6-5.5	12900	4280	14°-18°30'	640	7780-11880	15×2	3×2	50000
	2FLG-24	2400	3.67	11130	5100	14°-18°30'	910	13700	37	4×2	65283
	2FLG-30	3000	3.2	14300	6300	14°-18°30'	1410	23300	45	4×2	84870
The technical parameters provided are for reference only. Final product performance shall be subject to the official technical specifications.

Successful Cases

Rock Gold Mine - South Sudan

Placer Gold Mines - Zimbabwe

Chromite - South Africa

Alluvial Chrome Ore - Zimbabwe

Alluvial Tin Mines - Bolivia

Rock Tin Mines - Indonesia

Copper Oxide - Russia

Tantalum Niobium Ore - Nigeria

Lithium Mines - Brazil

Kaolin Mine - Uganda

Lead Zinc Mine - Morocco

Manganese Ore - Kenya

Hematite - South America

FAQ

What minerals can it process?

It efficiently grades gold, copper, iron, and phosphate ores, as well as industrial minerals like limestone and silica sand.

How to adjust product fineness?

Modify the overflow weir height or spiral rotation speed. Lower weirs increase fines output, while higher speeds enhance separation efficiency for coarse particles.

Can it handle high-clay ores?

Yes, optional spray nozzles wash clay deposits from particles, preventing agglomeration and ensuring consistent classification.

High-Efficiency Spiral Classifier for Mineral Grading

Work Principle

Gravity-Driven Separation

Three-Stage Classification

Spiral Rotation

Product Advantages

Precise Particle Control

Energy & Water Efficiency

Low Maintenance

Technical Parameters

Successful Cases

FAQ

What minerals can it process?

How to adjust product fineness?

Can it handle high-clay ores?

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