Underflow concentration of hydrocyclone
Writer： admin Time：2020-08-21 10:41 Browse：℃
During the operation of the hydrocyclone, the underflow discharge status of the hydrocyclone should be frequently observed, and the underflow concentration and fineness of the cyclone should be checked regularly. When the hydrocyclone has underflow concentration fluctuations or underflow pinching, it should be adjusted in time. Under normal working conditions of the hydrocyclone, the underflow discharge should be umbrella-shaped. If the concentration of the underflow in the cyclone is too large, the underflow will be discharged in a columnar or intermittent block shape.
The working principle of cyclone is to realize the classification of coarse and fine particles under the action of centrifugal force according to the size of the particles in the slurry. The solid content of the underflow slurry is relatively high, generally between 30%-50%, the overflow solid content is low, the solid particles are small, and the solid content is generally about 8%.
The adjustment method is as follows: the high concentration of the underflow in the cyclone may be caused by the concentration of the feed slurry being too large or the underflow is too small. At this time, you can add an appropriate amount of water to the feed first. If the underflow concentration is still large, you need Replace with a larger underflow port. If the underflow is discharged in an umbrella shape, but the underflow concentration is less than the concentration required for production, it may be caused by the low feed concentration. At this time, the feed concentration should be increased. The reason for the thin underflow clamp of the hydrocyclone may be that the underflow diameter is too large, the overflow pipe diameter is too small, the pressure is too high or too low, you can adjust the pressure first, and then replace a smaller underflow port, and gradually debug to reach the hydraulic power The cyclone is in normal production state.
The underflow concentration of the hydrocyclone reflects the effect of its classification. If the underflow concentration of the hydrocyclone is insufficient, the classification is not accurate, and there will be fine particles in the underflow, resulting in flow loss. If the underflow concentration of the hydrocyclone is too large, it will also cause abnormal discharge of large solid particles in the slurry. Therefore, pay special attention to the underflow concentration when operating the hydrocyclone.
Determinants of underflow concentration of hydrocyclones
The underflow concentration of the hydrocyclone is determined by two factors, namely the diameter of the underflow nozzle of the hydrocyclone and the flow condition of the slurry in the cylinder of the hydrocyclone. Therefore, the use of the underflow nozzle of the hydrocyclone will directly affect The result of slurry classification requires the operator to adjust the nozzle in time according to the working condition of the hydrocyclone.
The adjustment of the underflow nozzle of the hydrocyclone
The design and structure of hydrocyclones are different, and the adjustment methods of the underflow nozzles are also different. If the hydrocyclone can be equipped with a nozzle that can adjust the diameter of the cone tube, then directly adjust the cross-sectional area of ??the cone tube nozzle of the cyclone to change the underflow concentration to the required level. If the underflow concentration exceeds the adjustment range, Replace the large size cone tube or increase the diameter of the cone tube end.
If the hydrocyclone is not equipped with a nozzle that can adjust the diameter of the cone tube, the underflow nozzle of different sizes can be replaced when adjusting the underflow concentration. If the diameter of the cone and the nozzle are the same, the increased nozzle length will enhance the compression of the slurry. Similarly, the diameter of the nozzle can be reduced to achieve this effect.
The underflow nozzle of the hydrocyclone should be installed at the bottom of the cone and fixed with a suitable clamp. If the nozzle is not pushed to the bottom of the cone, the slurry will be compressed in two steps, which is beneficial to the high pressure of the hydrocyclone. run.
