NEWS INFORMATION

The grading effect of the hydrocyclone is influenced by a variety of factors, which are interrelated, and the following is a detailed analysis from different:

The grading effect of the hydrocyclone is influenced by a variety of factors, which are interrelated, and the following is a detailed analysis from different:

Feed characteristics

Concentration

The solid concentration of the feed directly affects the processing capacity and grading efficiency of the hydrocyclone. A concentration that is too high may causeage or excessive wear, making the equipment unable to operate normally and also reducing the grading efficiency; conversely, a concentration that is too low may reduce the grading accuracy. For, the higher the concentration of the incoming slurry, the greater the chance that the movement of solid particles is affected by collisions, which hinders the radial movement of a large number grading particles, reduces their speed drastically, and greatly reduces the grading efficiency. When the particle size of the grading particles being processed is 0.074mm, the mass of the feed should be between 10-20%, and when the particle size is 0.019mm, the concentration should be between 5-0%, and in general, the feed concentration should not exceed 30%.

Particle size distribution

The size of particles in the feed and its distribution range significantly affect the classification effect. A wider particle size distribution increases the difficulty of because particles of different sizes have quite different trajectories in the cyclone, making it difficult to achieve precise classification; while a uniform particle size distribution is conducive to obtaining better results.

Density

Particles of different densities have different trajectories in the hydrocyclone, so the density of the feed also affects the classification results. Particles with higher are more likely to move towards the outer wall of the cyclone under the action of centrifugal force, while particles with lower density are more likely to be discharged with overflow。

Operating parameters

Feed pressure

Feed pressure determines the velocity at which the fluid enters the hydrocyclone, which in turn affects the generation of central force. Appropriate feed pressure helps to improve classification efficiency and processing capacity. Increasing the inlet pressure increases the flow rate of the pulp, reduces the effect of viscosity, and improve the classification effect, and the sand concentration will also increase, but it can easily intensify the wear at the sand discharge port. The feed pressure range is generally (0.04 - 0.35MPa), and it must be ensured within a certain range to ensure that the overflow particle size of the hydrocyclone is within a range.

Flow rate

Changes in flow rate will affect the flow field distribution inside the hydrocyclone, thereby affecting the classification effect. Excessive flow rate may result in-circuit flow, where some pulp is discharged without effective classification, while too low a flow rate may reduce processing capacity.

Structural factors

Cone angle of the cyclone

The size of the cone angle affects the flow path and residence time of the fluid inside the cyclone, which in turn affects the classification effect. A smaller cone angle allows the fluid to stay longer inside the cyclone, which is beneficial for the separation of fine particles, but processing capacity may be reduced; a larger cone angle has the opposite effect, with improved processing capacity but potentially reduced classification accuracy.

Shape and size of the inlet

The shape and of the inlet have a significant impact on the velocity and direction of the fluid entering the cyclone, which in turn affects the classification effect. A reasonable inlet design can improve the classification and stability. For example, an appropriate inlet shape can allow the pulp to enter the cyclone more evenly, reducing the generation of turbulent flow.