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CZ Hydrocyclones

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CZ Hydrocyclones

  • CZ Hydrocyclones
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1.Operating Principle

A hydrocyclone is a device to classify, separate or sort particles in a liquid suspension based on the ratio of their centripetal force to fluid resistance. The feed is introduced under pressure through the tangential entry at a high speed. The motion of feed, mix of media and material particles forms centrifugal force field.

Under the force field, including centrifugal force, media viscosity resistance, buoyancy force, gravity, etc, the trajectories of particles (or liquid phase) are different due to their different sizes, densities. The coarse particles (or liquid phase) or particles (or liquid phase) with high density, motion to periphery, and will be discharged through apex of the vortex.

The fine particles (or liquid phase) or particles (or liquid phase) with low density, motion to the core, and will be discharged through vortex finder. Therefore, the separation of particles by the fineness and density is achieved.

2.Application field:

Combination with grinding mills in closed-circuit classification;

Combination with fine screens in closed-circuit multi-classification;

Desliming before tailings impoundment;

Degritting in non-metallic minerals processing;

Classification and desliming before gravity separation;

Thickening before tailings convey;

Oil-sand, oil-water separation operation in oil taping industry.

3.Features

The feed inlet is specially designed as to reduce the wearing and stabilize the feed flow.

The inner lining is made of the advanced CNU wear-resistance material co-developed with Ukraine.

The special design of the column and cone enable the enlargement classification space; reduce the particle size of spigot products, and mineral particles in qualified particles size fraction. CZ hydro cyclones’ application in industries has proved its higher efficiency (10~20% higher than conventional hydro cyclones).

4.Technical Data

ModelCZ75CZ100CZ125CZ150CZ200CZ250CZ300CZ350CZ500CZ660
Q2.5~36~88~1010~1220~3034~3940~4870~86175~212300~370
Do18±222±236±440±454±670±583±8100±10150±10205±20
Du8±110±216±218±418±434±442±555±580±10105±10
Overflow size10~3714~4019~4326~5330~6037~6240~7544~8874~15090~210

Notes:
Q: Throughput m3/h (under the condition that feeding pressure P=0.01Mpa)
D0: Overflow diameter mm
Dd: apex diameter mmOverflow size: m

5.Examples

In order to improve the throughput of secondary grinding mill, CZ 350 hydro cyclones are used in closed circuit in secondary grinding in Fankou Zinc-lead ore.

No.ItemPrevious dataAfter the use of CZ350 hydro cyclone
1Secondary mill throughput2050t/d2655.4t/d
2Secondary classifier overflow particle size88.0%-200 mesh85.4%-200 mesh
3Overflow density39.05%38.61%
4Classification efficiency35%42.20%
5Spigot product density74%
6Grinding mill q-200 mesh0.785t/m3h1.068t/m3h
The efficiency of CZ350 is 42.2%.

In order to reduce the particle size of grinding products, CZ500 hydro cyclones have been used to replace Krebs hydro cyclones in secondary grinding in Baotou iron ore-dressing plant.
The results indicate that the secondary ball mill q-200 mesh is 0.636t/m3h, increased by 15%; the overall overflow size -200 mesh 93.15%, increased by 6.09%; the classification efficiency increased by 14.26%.

The tailings separation in Fankou Zinc-Lead Ore.
The feed density is 22.53%, -19m 37.28%. The spigot product rate is 60.37%, density is 70.94%. -19m size fraction recovery rate is 88.90%. The classification efficiency is 76.07%. CZ hydro cyclones have solved the problems of sand in tailings, enabling the sustainable development of Fankou Zinc-Lead Ore.

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