Introduction

Introduction to Spiral concentrator

Spiral classifier or spiral concentrator is one mining machine used for ore dressing production, which precipitated in the liquid at different speeds by means of the proportion of solid particles and which is a device of the mechanical grading.

The screw classifier can grind the material into the powder level in the filter, and then the coarse material can be discharged from the overflow tube of the spiral concentrator. The spiral classifiers is also referred as grader.

The Working Principle of Classifier

The screw classifier is relying on the different sizes, various specific gravity in order to reach the different theory of settling velocity in the liquid, which can cause the fine mineral particles floating in the water into over flow, and the coarse ore particles sinking into the bottom.

The base of the machine is made up of channel steel body made of welded steel plate. The main features of this machine is that the head is taking spiral shaft and the main part pieces of it is mainly using wear resistant and durable material, and there are two type of the listing devices including device electric and manual.

The features of screw classifier

1. To sort of the separation of excessive powder separation mechanism in sand dry production process.

2. This screw classifier is used for the big or medium production line with dry type.

3. The powder percentage between 0.00--0.75mm can be adjusted of 2%-15%.

4. The powder quality can be easily controlled, and the granularity adjustment is easy, flexible and credible.

5. Lower maintenance ratio with the plate of tile.

6. Inverter control technology, operating more concise.

Technical data

Model	Spiral  Diameter (mm)	Trough  Length (mm)	Spiral  rotate  speed (r/min)	Processing  capacity（t/d）		Motor  Power （kw ≤）		Dimensions （mm≤）			Total  weight （t）
				Sand -return	Overflow	For  driving	For  lifting	Length	Width	Height	≤
FG-3	300	3000	12-30	80-150	20	1.1	----	3850	490	1140	0.7
FG-5	500	4500	8-12.5	135-210	32	1.1	----	5430	680	1480	1.9
FG-7	750	5500	6-10	340-570	65	3	----	6720	980	1820	3.1
FG-10	1000	6500	5-8	675-1080	110	5.5	----	7590	1240	2380	4.9
FC-10		8400		675-1080	85	7.5	----	9600	1240	2680	6.2
FG-12	1200	6500	4-6	1170-1870	155	7.5	2.2	8180	1570	3110	8.5
FC-12		8400		1170-1870	120	7.5	2.2	10370	1540	3920	11.0
2FG-12		6500		2340-3740	310	15	4.4	8230	2790	3110	15.8
2FC-12		8400		2340-3740	240	15	4.4	10370	2790	3920	17.6
FG-15	1500	8300	4-6	1830-2740	235	7.5	2.2	10410	1880	4080	12.5
FC-15		10500		1830-2740	185	7.5	2.2	12670	1820	4890	16.8
2FG-15		8300		2280-5480	470	15	4.4	10410	3390	4080	22.1
2FC-15		10500		2280-5480	370	15	4.4	12670	3370	4890	30.7
FG-20	2000	8400	3.6-5.5	3290-5940	400	11-15	3	10790	2530	4490	20.5
FC-20		12900		3210-5940	320	11-15	3	15610	2530	5340	28.5
2FG-20		8400		7780-11880	800	22-30	6	11000	4600	4490	35.5
2FC-20		12900		7780-11880	640	22-30	6	15760	4600	5640	48.7
FG-24	2400	9130	3.67	6800	580	15	3	11650	2910	4970	26.8
FC-24		14130		6800	490	18.5	4	16580	2930	7190	41.0
2FG-24		9130		13600	1160	30	6	12710	5430	5690	45.8
2FC-24		14130		13700	910	37	8	17710	5430	8000	67.9
2FG-30	3000	12500	3.2	23300	1785	40	8	16020	6640	6350	73.0
2FC-30		14300		23300	1410	----	----	17091	----	8680	84.8