Spiral Chute

Advantages

• Stable, easy control, wide range of concentration

• Large capacity, enrichment ratio, high recovery rate

• Small cover space, less water consumption, simple structure, no need of power

• Simple installation, convenient operation,less investment, quick return

Work Principle

Ore pulps are uniformly fed into machine and form different layers as they pass across chute. Heavy minerals precipitate to bottom and are moved toward inner edge by the comprehensive action of various forces; light minerals are moved toward outer inner due to the speedy rotation. As a result, mineral particles with different density are divided into three zones------concentrate, middling and tailing.

Spiral chute is suitable for treatment of 0.6-0.03mm lode and placer, but high mud content is bad for separation. At present, spiral chute has been widely used in the treatment of iron ore, tungsten, tin ore, niobium tantalum ore, coastal and riverside placer and gold ore.

Technical Parameters

Model		BLL-2000	BLL-1500	BLL-1200	BLL-900	BLL-600	BLL-400
Outside Diameter (mm)		2000	1500	1200	900	600	400
Screw Pitch (mm)		1200	900, 675	900, 720, 540	675, 540, 405	450, 360, 270	240, 180
Pitch Diameter Ratio		0.6	0.48, 0.36	0.75, 0.6, 0.45	0.75, 0.6, 0.45	0.75, 0.6, 0.45	0.6, 0.45
Lateral Dip Angle (degree)		9°	9°	9°	9°	9°	9°
Max. Screw Numbers Per Set		3	4	4	4	2	2
Feed Size (mm)		2.00~0.04	0.8 ~0.037	0.3~0.03	0.3 ~0.03	0.2~0.02	0.2 ~0.02
Feed Density (%)		30 ~55	30 ~55	25 ~55	25 ~55	25 ~55	25 ~55
Capacity (t/h)		7~10	6~8	4~6	2~3	0.8~1.2	0.15~0.2
Overall Dimension	Length (mm)	2120	1600	1360	1060	700	460
	Width (mm)	2120	1600	1360	1060	700	460
	Height (mm)	5600	5300	5230	4000	2600	1500
Weight (kg)		900	850/800	700/650/600	450/400/350	120/100/80	50

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