1. What is the principle of the selection of the spiral concentrator ?

The spiral concentrator is made up of 4-6 turns of spiral chutes. It is surrounded by a rubber tire with a cast iron or grooves, groove ceramics production. When a certain concentration of slurry is fed into the upper part of the spiral concentrator, the slurry language spiral groove rotates downward under the action of gravity and centrifugal force. The larger ore particles first sink to the bottom of the tank, and the smaller specific gravity particles flow in the upper layer of the slurry. The large-volume ore particles that sink at the bottom of the trough have small frictional force and large frictional force. Therefore, the velocity along the trough is small, the centrifugal force is also small, and the inner edge of the trough is close during the movement. The small-weight ore particles moving in the upper layer of the slurry have a large flow velocity in the upper layer, so the velocity along the groove is large, and the centrifugal force is large, so that it is close to the outer edge of the groove. In this way, it is possible to intercept the ore particles with different specific gravity at different positions of the spiral to achieve the purpose of selection.

2. What are the main factors affecting the operation of the spiral concentrator?

There are many operational factors affecting the spiral concentrator, among which there are adjustable ore supply, ore concentration and flushing water volume. The ore amount is related to the diameter of the spiral concentrator, the helix angle, the shape of the spiral groove section and the nature of the ore. The productivity increases as the diameter of the helix and the helix angle increase. The finer the particle size of the ore and the grain size of the heavy product, the higher the mud content, the lower the productivity. The concentration of the ore concentration should be lower than that of the rough selection. The concentration of the ore concentrate is not high, generally 11-14%. Flushing water should also be properly controlled, and its main function can improve the quality of heavy products.

3. What are the advantages and disadvantages of the spiral concentrator and what kind of minerals and operations?

The machine has the advantages of simple structure, easy operation and maintenance, high productivity and large adaptability. Especially when the ore concentration and the ore concentration change within a certain range, the influence on the concentrate quality and recovery rate is not obvious. The disadvantage is that the selection of the flaky ore is not good.

Spiral concentrator is mainly used for sorting of sands, such as iron ore, ore, tin, tantalum and niobium ore.

The machine is generally used for roughing operations, and can also be used to treat magnetic separation and flotation tailings, from which heavy minerals are recovered. The most suitable treatment ore particle size upper limit is 3-4 mm, the lower limit is 0.07 mm.

Downhole motor is composed of five assemblies: by-pass valve, motor, anti-drop, cardan shaft and drive shaft.