The spiral classifier is a highly efficient piece of equipment used in ore processing to classify solid particles based on their size and specific gravity. It operates by taking advantage of the different settling speeds of particles in a slurry. Fine particles float and overflow while coarse particles settle at the bottom and are pushed forward to the discharge outlet by the spiral blades. This spiral sand classifier is commonly paired with a ball mill to form a closed-loop grinding system, and is also widely used in gravity concentration plants and metal beneficiation operations.

Key Features

Available in high weir, submerged, and XL types, with single and double spiral designs.

Highly effective in separating fine mud, sand, and particles in a mineral processing circuit.

Improves grinding efficiency when used in closed-circuit with ball mills.

Simple structure and easy maintenance for industrial-scale applications.

Reliable operation for ore classification, dewatering, and desliming.

Technical Specifications

Model	Spiral Dia (mm)	Chute Length (mm)	Rotary Speed (r/min)	Capacity - Sand (t/d)	Capacity - Overflow (t/d)	Transmission Power (kW)	Lift Power (kW)	Length (mm)	Width (mm)	Height (mm)
FG-3	300	3000	12–30	80–150	20	1.1	-	3850	490	1140
FG-5	500	4500	8–12.5	135–210	32	1.1	-	5430	680	1480
FG-7	750	5500	6–10	340–570	65	3	-	6720	980	1820
FG-10	1000	6500	5–8	675–1080	110	5.5	-	7590	1240	2380
FG-10	1000	8400	-	675–1080	85	7.5	-	9600	1240	2680
FG-12	1200	6500	4–6	1170–1870	155	7.5	2.2	8180	1570	3110
FC-12	1200	8400	-	1170–1870	120	7.5	2.2	10370	1540	3920
2FG-12	1200	6500	-	2340–3740	310	15	4.4	8230	2790	3110
2FC-12	1200	8400	-	2340–3740	240	15	4.4	10370	2790	3920
FG-15	1500	8300	4–6	1830–2740	235	7.5	2.2	10410	1880	4080
FC-15	1500	10500	-	1830–2740	185	7.5	2.2	12670	1820	4890
FG-15	1500	8300	-	2280–5780	470	15	4.4	10410	3390	4080
2FC-15	1500	10500	-	2280–2480	370	15	4.4	12670	3370	4890
FG-20	2000	8400	3.6–5.5	3290–5940	400	11–15	3	10790	2530	4490
FC-20	2000	12900	-	3210–5940	320	11–15	3	15610	2530	5340
2FG-20	2000	8400	-	7780–11880	800	22–30	6	11000	4600	4490
2FC-20	2000	12900	-	7780–11880	640	22–30	6	15760	4600	5640
FG-24	2400	9130	3.67	6800	580	15	3	11650	2910	4970
FC-24	2400	14130	-	6800	490	18.5	4	16580	2930	7190
2FG-24	2400	9130	-	13600	1160	30	6	12710	5430	5690
2FC-24	2400	14130	-	13700	910	37	8	17710	5430	8000

Application Scenarios

The spiral classifier is available in several configurations: high weir, submerged, single spiral, and double spiral types. While low weir models are rarely used, the high weir and submerged types are widely employed in modern ore beneficiation plants. This equipment is essential for:

Forming closed-loop grinding circuits with ball mills.

Classifying ore sand and fine mud in gravity separation processes.

Grading ore pulp in metal ore dressing plants.

Performing desliming and dewatering in washing operations.

Due to its robust design and versatile performance, the spiral sand classifier is used in a wide range of mineral industries including gold, copper, iron ore, and coal beneficiation.

Shipping & Packaging

All spiral classifier machines are shipped with industrial-grade packaging to ensure safety during transit. Depending on model and configuration, dimensions and shipping weight vary. Please contact us for container planning and freight solutions.

After-Sales Service

Quality assurance for 1 year except for vulnerable parts, human factors and natural disasters.

Support engineers to provide on-site guidance for installation and commissioning;

7*24 hours online communication and guidance;

Product manuals and installation videos are provided;