Active Member
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[China]
Address: Lane 5558, Chuansha Road, Pudong New Area, Shanghai
Contact name:Tian
Shanghai Banghuai Heavy Industry Machinery Co., Ltd. |
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Centrifugal concentrator has been used for decades in China, not only for separating tin and tungsten ore slime, but also for treating lean iron ore. The specifications of the centrifuge were changed from the original φ 800 mm × 600 mm to 600 mm φ 1600 mm × 900 mm, and is designing and manufacturing larger and continuous discharge centrifuges.
Centrifugal concentrator is also called
centrifugal chute. There are many kinds of centrifuges, but their
structures are basically the same. When the centrifuge rotates at
high speed, it produces great centrifugal force to strengthen the
gravity separation process, so that the fine ore particles can be
recovered more effectively. Its emergence successfully solves the
full recovery of fine particles. Therefore, it is widely used to
recover slimes such as tungsten, tin and iron.
The main advantages of centrifugal
concentrator are large processing capacity, low lower limit of
recovery particle size, stable operation and easy operation; But
its enrichment ratio is not high.
| Equipment model | STL 20 | STL 30 | STL 60 | STL 80 | STL 100 |
| Productive capacity(T/h) | 0.2-1 | ‘2-8 | 10-40 | 35-70 | 75-120 |
| Feed grain(mm) | 0-3 | 0-4 | 0-6 | 0-6 | 0-6 |
| Feed concentration(%) | 0-50% | 0-50% | 0-50% | 0-50% | 0-50% |
| Recoil water(T/h) | 1.5-2 | ,4-6 | ,10-15 | 17-25 | 40-60 |
| Concentrate production(kg/time) | ,2-3 | ,10-20 | 30-40 | 60-70 | 70-80 |
| The motor power(kw) | 0.75 | 1.5 | 4 | 11 | 18.5 |
| Cone rotational speed | 800 | 600 | 460 | 400 | 360 |
| The pressure of waterMpa | 0.04 | 0.12 | 0.25 | 0.35 | 0.4 |
| Overall dimensions(mm) | 790*785*790 | 1180*1140*1250 | 1970*1670*1750 | 2300*1800*2200 | 2500*2000*2400 |
The drum of the centrifugal
concentrator rotates at a high speed with a certain number of
revolutions, and the ore slurry is sent to the inner wall of the
drum through the ore feeding nozzle in two places. The slurry
rotates with the drum at a high speed. Under the action of
centrifugal force, heavy minerals are deposited on the inner wall
of the drum and rotate with the drum. The light mineral particles
in the slurry rotate with the drum at a certain differential speed.
In the process of rotation, they rotate and flow from the ore
feeding end to the ore discharge end along the slope direction of
the drum at a certain spiral angle, and are discharged through the
ore discharge separator at the end, which is tailings.
After 3min separation, the ore feeding separator will automatically turn to the concentrate discharge position and stop feeding into the drum. After the tailings are discharged, the ore discharging separator will automatically turn away from the original normal position to intercept the concentrate, and then the high-pressure flushing water valve will automatically open. The high-pressure flushing water will flush the concentrate deposited on the inner wall of the drum. After the concentrate is flushed, the high-pressure water valve will automatically close. After the concentrate is discharged, The ore discharge separator and ore feeding separator are reset automatically to start the next separation cycle.
The structural factors of centrifugal concentrator mainly include the diameter, length and half cone angle of the drum. Increasing the diameter of the drum can increase the production capacity of the equipment in direct proportion; Increasing the length of the drum can greatly improve the production capacity of the equipment, but unfortunately, the lower limit of the recycled particle size will also rise. Increasing the half cone angle of the drum can improve the quality of high-density products, but the recovery will be reduced accordingly. In order to solve this contradiction, centrifugal concentrators with double taper, three taper and even four taper have been developed successively.
The operation factors of centrifugal
concentrator mainly include feed concentration, feed volume, drum
speed, feed time and separation cycle. When the same material is
processed by centrifugal concentrators of different specifications,
the feed volume per unit drum wall area should be approximately
equal, and the feed concentration should increase with the increase
of drum length; When the same equipment is used to treat different
materials, the influence of feed concentration and volume is the
same as other chute equipment. The rotational speed of the drum is
approximately inversely proportional to the square root of the
product of the drum diameter and length. Increasing the rotating
speed in a certain range can improve the recovery, but the quality
of high-density products is reduced due to the poor stratification
effect.
Tag:
Centrifugal concentrator centrifugal separator
