In mineral processing process, classification is an important part of the preparation process, classification work, and the results will affect the subsequent work of concentrator.Spiral classifier as a kind of classification equipment, is widely used in the concentrator. However, do you know the development history of spiral calssifier?

The development history of spiral calssifier is as follows:

From study out of the first grading machine, classifier with the development of the society to keep pace with The Times.Later, spiral classifier gradually replaced the old classifier, become the market to be bestowed favor on newly.Traditional spiral classifier classification efficiency is generally low, between 35% ~ 50%, some even less than 30%, and the classification efficiency is too low will directly cause cyclic load increases, reducing mill processing capabilities, mineral crushing serious, worsening operation, reduce the metal recovery, the sand inclusion has a large number of qualified grade.In order to overcome the shortcoming of traditional spiral classifier, beneficiation technology workers at home and abroad to do a lot of research work, such as changing the speed of the screw, the change of pitch of varying pitch, such as in the sand conveying section adding flushing water pulp flow and so on.Although these measures to a certain extent changed the spiral classifier classification effect, but in general, the classification efficiency are not substantial.

Humans, however, the pace of innovation will not stop, a series of new type, high efficiency, energy saving of the spiral classifier is popular in the line of sight.Much new period of conical spiral classifier, the larger change traditional screw machine structure, with conical spiral and taper surface shape of tub structure, constitute a multiple classifying chamber, produce multiple classification, can undertake multiple classification, raise the efficiency of classification.Composite round sieve spiral classifier, use the upper space of the original spiral classifier, it into the spiral screen inside, according to a new type of composite classification technology of solid particles in the requirements under the condition of the granularity of the separation, significantly reduces the effect of ore crushing, improve the ore dressing recovery rate.Magnetic spiral classifier, it is mainly by using the water particles in a gravitational field of the settlement for grading, above the class to add a magnetic system, make the magnetic mineral grains received two force field, the particles in strict accordance with the particle size grading, improve the classification efficiency, increase the ability of the mill.

Hierachial sieving machine is in the rear of the original spiral classifier (http://www.chinaquarry.com/products_show/pro30.html) has increased a synchronization with spiral vane rotating cylindrical sieve and matched with the water pipe, on the feeder and screen.Inside the sieve, equipped with internal screw blade, tub at the back of the modified into undersize chute, used to access the undersize.Hierachial sieving machine will interfere in sedimentation classification principle and sieving classification theory organically, to strengthen the degree of sizing, effectively improve the classification efficiency.

The development history of spiral calssifier: http://www.chinaquarry.com/products_show/pro30.html

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Because our PYB series cone crushers possesses greater superiority than ordinary ones. Those unique advantages of PYB series cone crusher are as follows:

1. Rational construction, advanced crushing principle and technical data, reliable operation and low cost.

All components of crusher are protected by wear resistant materials, which reduces the maintenance cost and increace service life by almost 30%.

2. Shorter down time

Our cone crusher adopts hydraulic bolt and overload protecting system, which release the impact force gently when uncrushable material is fed into the cavity and revert to original position after material discharged. The brand-new hydraulic cylinders can discharge the material when the machine stops with load. Hydraulic cone crusher has the advantages of safer, more convenient and shorter down time compared with traditional spring type cone crusher.

3. Various crushing cavities meet wide range of product size requirements.

By replacing the mantle and concave plate, the crushing cavity is adjustable, from standard coarse type to short-headed fine type, which meets large range of size requirements.

4. .Padding free in mantle and concave changing.

Our hydraulic cone crusher adopts new fixing method of mantle and concave, which is padding free and less time consuming.

5. .Easy maintenance and operation.

All parts of PYB Series Cone Crushers (http://www.chinaquarry.com/news_show/n117.html) can be assembled, disassembled and repaired from the top and side part, including the fixed cone and movable cone. It is no need to disassemble and install the frame, and fasten bolts, so SMH cone crusher is much more convenient and fast for replacing liner plates. The crusher production efficiency will be much better by using the hydraulic motor.

6. Thin oil lubricating: reliable, advanced and increases its service life.

Unique oil lubricating system increases the longevity of machine. Non-contact labyrinth sealing element is of high performance, which improves the reliability of dust resisting and fundamentally eliminates the problems caused by oil water mixture appeared in spring type cone crusher.

7. Lamination crushing principle, excellent product shape:

A prominent increase in fine material ratio and cubic product content, and massive decrease of elongated flaky particle are achieved through selective crushing of material, which results from the replacement of single-particle crushing chamber by special inter-particle-grinding crushing cavity.

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