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Introduction of Spiral Classifier
Spiral classifier, working with ore mills to form close circulation in the concentrating plant, whose classification process depends on the sedimentation velocity of the particles. Its external appearance is a rectangular oblique chute, whose bottom is semi-circular; the inclination angle of the bottom of the chute is from 120 to 18.50.There is 1 or 2 vertical axles installed in the chute, spiral blades are installed along the axle one after another. With the help of the drive motor on the top, the whole machine can drive the screw shafts to rotate.
Application of Spiral Classifier Machine for Coal
Energy-saving Low Cost sand screw washer is widely used in mineral processing plant to match with the ball mill and form a closed-circuit circulation to process mining sand. or used in gravity mine-selection plant for classifying sand and mine mud, and grading sand according to the particle size, desliming, dewatering in the mine washing process. This machine has simple structure, reliable operation, convenient operation, etc.
Working Principle of Spiral Classifier
If there are two spiral axles in the chute, all of the spiral blades rotate outwards when the machine is viewed from the top. The slurry, fed from the flank of the chute, form classification of sedimentation at the bottom of the chute. Coarse particles dip into the bottom of the chute, and then they will be pushed to the top by the spiral and discharged. During the transportation process, the coarse particles dehydrate themselves. The fine particles, which do not have enough time to dip into the bottom of the chute, are carried by the ore pulp flow through the surface and discharged from the overflow weir. There is lifting equipment on the upper beam of the frame, which is used to adjust the distance between the spiral blades and the chute bottom and raise the spiral axle when the machine stops working, in case that the ores deposit and bury the spiral blades to damage the axles and blades when the machine starts working again.
Types of Spiral Classifier
According to the height of the surface of the liquid classification, the machines can be divided into high weir type and immersed weir type. The overflow weir of the high weir type spiral classifier is higher than the center of the spiral axle at the bottom and lower than the top of the spiral blades. As the surface of the liquid classification is not very long, the liquid surface can feel the mixing of the spiral blades, and then this kind of machine can be used for the classification of coarse particles, whose classification granule is more than 0.15MM. The whole spiral blades of the immersed weir type are immersed in the flooding level, the area of the classification is large and stable, which is suitable for the classification of the fine particles, the classification granule of which is less than 0.15mm. It has high productivity. Besides, there is one kind of low weir type of spiral classifier, whose surface of the liquid classification is lower than the spiral bearing. The area of the liquid surface is small,but the machine can mix strongly. It is mainly used in the washing of the ores with mud.
Technical Parameter of Spiral Classifier
Name |
Unit |
Specification |
|||||
FLG-300 |
FLG-500 |
FLG-750 |
FLG-1000 |
||||
Number of Spiral |
pc |
1 |
1 |
1 |
1 |
||
Diameter of Spiral |
mm |
300 |
500 |
750 |
1000 |
||
Spiral Distance |
mm |
160 |
250 |
380 |
500 |
||
Length of Spiral |
mm |
2880 |
4413 |
5340 |
6228 |
||
Head of Spirals |
Head |
2 |
2 |
2 |
2 |
||
Trough |
Length |
mm |
3000 |
4500 |
5500 |
6500 |
|
Width |
mm |
360 |
555 |
830 |
1112 |
||
Height |
mm |
280 |
373 |
547 |
700 |
||
Rotation speed of Spiral |
r/m |
8.3-22 |
8-15.5 |
2.4-9.9 |
1.6-7.4 |
||
Obliquity of Trough |
Degree/m |
14°-18°30’ |
14°-18°30’ |
14°-18°30’ |
14°-18°30’ |
||
|
Driving Device (Motor) |
Specification |
|
Y90L-6 |
Y90L-6 |
Y132S-6 |
Y132M2-6 |
|
Power |
KW |
1.1 |
1.1 |
3.0 |
5.5 |
||
Speed |
r/m |
930 |
930 |
960 |
960 |
||
|
Driving Device (Speed reducer) |
Specification |
|
WSJ-120-Ⅱ |
Specified |
WSJ-180-Ⅱ |
EQ400 |
|
Speed Ratio |
|
40 |
40 |
51 |
48.57 |
||
|
Lifting Device (Speed reducer) |
Specification |
|
Specified |
Specified |
Specified |
Specified |
|
Speed Ratio |
|
30 |
60 |
40 |
40 |
||
Weight |
KG |
668 |
1600 |
2900 |
4400 |
||
Height of overflow weir |
mm |
262 |
311 |
407 |
521 |
||
Shandong (Zhaoxin) Mining Machinery Group as Shandong (Zhaoxin) Heavy-Duty Mining Machinery Co., Ltd is located in No.66 Jinlong Road, Zhaoyuan Economic & Technological Development Zone, which is a national economic development zone in China . With 30 years manufacturing experience and scientific management and strong financial & technical strength, the company has become a large and leading manufacturer in mineral processing and smelting equipment for nonferrous metals and nonmetals in Shandong area. Zhaoxin machinery has exported to 20 and more countries. The company mainly manufactures mineral processing and smelting equipment with daily processing capacity of 50 to 5000 MT and automatic control equipment with 20 varieties and more than 200 items. Among processing equipment, there includes feeding, crushing, sieving, grinding, classification, stirring, floatation, magnetic separation and cold separation. Moreover, the company offers full service from mining, prospecting, mineral processing experiment, project technical design, machinery and equipment installing to technical conduction and operators training. The company has occupied a good reputation in this industry by first class of quality, reasonable price and durable operation life. The company is ISO 9001:2008 certificated. Mr. Wanxin Luan, Chairman and General Manager of the company, greet all friends from home and abroad. We are sure that our service from heart and soul will make all customers satisfied from head to toe.
Sincerely welcome you to visit our factory!
Our company has many other products for you reference as following:
1.Crushing Machinery
2.Grinding Machinery
3.Screening Machinery
4.Flotation Machinery
5.Magnetic Equipment
6.Thickening Equipment
7.Filtration Equipment
8.Gravity Separation Equipment
If you have any problems, please feel free to contact us. We would do our best to solve them as soon as possible. Welcome to negotiate the price, you can gain the maximum efficiency with the minimum investment.
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