Hydrocyclone grading overview

The water cyclone is shown in Fig. 9: the upper end is formed into a cylindrical shape, and the lower part is formed into a cone shape. The slurry is injected into the hydrocyclone along the tangential direction by the pump or by the head pressure.

The slurry entering the cyclone rotates at a large speed, so the solid particles are subjected to centrifugal force exceeding tens to hundreds of times the gravity. Since the slurry rotates at a large speed, there are two types of slurry flow in the cyclone: ​​one is an outflow that rotates downward near the wall of the cone; and the other is an inflow that is rotated in the middle of the cone. The coarse sand in the ore is subjected to a large centrifugal force into the outer stream, sinks along the swirling wall, and is discharged by the grit port, while the fine particles and most of the water in the ore are ascended in the form of inflow, and overflow The flow tube is discharged as an overflow to complete the extension operation.

2. How to adjust the operation of the hydrocyclone? What is the general hydraulic cyclone applied to?

The adjustment of the hydrocyclone can be adjusted by the pressure of the slurry pressure, or by changing the diameter of the discharge port, the concentration of the slurry, the angle of the cone, the size of the feed pipe and the overflow pipe, and the particle size composition of the material.

In addition to the classification work used in the grinding cycle, the hydrocyclone can also be used for deliming, dewatering and flotation of pesticides. In addition, it can also be used as a re-suspension beneficiation , which can be sorted to a particle size of about 0.1 mm.

3. What are the advantages and disadvantages of the hydrocyclone? How is the specification expressed?

The hydrocyclone has many advantages: simple structure, no moving parts; large processing capacity per unit volume; high classification accuracy; low equipment cost; less occupied space, convenient maintenance;

The hydrocyclone also has the disadvantages: the sand pump used for transporting the slurry consumes a large amount of power; the sand pump has a sharp wear at the inlet and outlet, so the repair is frequent; the range of the ore size, the slurry concentration and the pressure variation is required to be small, and the classification quality fluctuation is easily caused. However, measures such as cast stone bushings at the inlet and outlet can greatly reduce wear. Strictly strengthen the operating system, most of the shortcomings of the cyclone affecting quality can be avoided and reduced.

The size of the cyclone is indicated by the diameter of its barrel portion. For example, the 350 hydrocyclone has a cylinder diameter of 350 mm.

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