Spiral Chute

Overview of Spiral Chute (Spiral Concentrator)

Glass-steel spiral chute is a combination of benefits of a spiral concentrator, a spiral chute, a table concentrator, and a centrifugal ore separator. In 1977, China invented this new-style equipment which is particularly adapted in mining and beneficiation. Practice has proved that spiral chute is a useful tool for mineral processing, especially on strands, riversides, beaches and river-ways. It has some incomparable advantages, such as reasonable structure, easy installation, small space, convenient operation. When processing minerals, it features high stability, enhancive resolution, high capacity, excellent efficiency, superior recovery, and reliable operation. What is more, it comes with light weight, low noise, super moisture and corrosion resistance. In addition, it can be fully applicable to materials of different density, feeding granularity, and grade.


Features and advantages of Spiral Chute

Low-cost but high-efficiency spiral concentrator It has been proved that spiral concentrator works efficiently in a coal separating plant. This useful equipment combines with traditional system of slack-coal and coal-slurry. Compared with the system of water-only cyclone, the investment and operation cost of spiral concentrator is much lower. Unlike the other separation equipment, spiral concentrator takes up small space, because its main parts, such as pump pond, pipeline cover a small area. If you have a spiral concentrator, you can save much budget for your factory buildings, and need not worry about the large expense on heating or ventilation.

Application of Spiral Chute

Spiral chute is suitable for fine minerals of 0.3-0.02 mm granularities, such as iron ore, ilmenite, chromite, pyretic, zirconite, rutile, monazite, xenotime, tungsten ore, tin ore, tantalum ore, colombite ore as well as other nonferrous metal, rare metal and nonmetal minerals of different proportions.

It comes with advantages of high capacity, excellent efficiency, superior recovery, and reliable operation. Undoubtedly, spiral chute is ideal equipment for investing in mining industry.

Working Principle of Spiral Chute

Gravity separators have been used in coal industry for several decades. Generally, the technologies of separation can be divided into four kinds: dense-media separation, bed separation, mobile-layer separation, and centrifugal separation. The technology adopted by spiral concentrator is the combination of bed separation, mobile-layer separation and centrifugal separation.

Spiral chute applies to sorting size 0.3-0.02mm fine materials of coal, however, in many cases; this range can be expanded into 3-0.074mms. When the sorting coefficient ranges from 1.70 to 2.00, the EP number is 0.10-0.15. To research the coal wash-ability, operators need to expand test for fine granularity. The aim of test is to make an exact prediction on the separation efficiency of coal, which is just like the evaluation on the floatability. The granularity size for the test should be divided into five grades, which are 3-1.68mm, 1.68-1.00mm, 1.00-0.59mm, 0.59-0.15mm, and 0.15-0.074mm respectively. The ratio of these float-and-sink tests is 1.3~ 2.2, and the disparity ratio is o.10.

Operation of Spiral Chute

The main parts of a spiral concentrator include feeder, frame, Spiral Chute and output chute etc. Spiral concentrator is fixed by a piece of timber or hob in place. The mineral sand is sent by pump to the two material entrances at the top of spiral. And then operators add enough water and accommodate the density of mash, which flows from the top to the bottom naturally. A centrifugal force of inertia was produced on the slope in the velocity of rotation.

According to the different proportions, granularities, shapes of the mineral sand, mineral sand will be divided by the effect of gravity and centrifugal force. Concentrated ore flow into ore bucket. Tailings are pumped to the tailing pond where a draw-off pump works. The above is the whole process of material separation.