Hydrocyclones Classifier
PTMS Electromagnetic Separation
What Is Electromagnetic Separation?

Hydrocyclones classifier

Operation parameter
1.Feeding pressure: The feed pressure is an important parameter for the work of a cyclone. Improve the feed pressure, can increase the pulp flow, material by centrifugal force increases, can improve the classification efficiency and underflow concentration, but by increasing the pressure to reduce the size of coal has little effect, energy consumption has increased significantly, especially the whole hydrocyclone underflow mouth wear more serious. Low pressure (0.05 ~ 0.1MPa) operation for coarse material handling and high pressure (0.1 ~ 0.3MPa) operation for fine and muddy materials
2.Feeding volume: Increasing the feed volume, the grading size becomes coarser, reducing the amount of feed and the finer size of the grade
3.Concentration: When the size and pressure of the cyclone are certain, the feed concentration has an important influence on the overflow size and the classification efficiency. The concentration of feed is high, the viscosity resistance of the fluid is increased, the grading size becomes coarser and the classification efficiency is reduced. The practice shows that when the grading size is 0.074mm, the feeding concentration is 10% to 20%.
4.Feeding size: The change of feed grain size will obviously affect the classification effect of hydrocyclone. When keeping other parameters unchanged, the material content of feed is less than the size grading is less when the fine content in the underflow is less, and the high concentration, the content of coarse particles in the overflow increase, decrease the classification efficiency of hydrocyclone; when the material close to the size grading materials in a long time, is in the bottom of fine material. The coarse material in the overflow, the grading effect decreased.

Structural parameters
1.Hydrocyclone diameter: The diameter of the hydrocyclone mainly affects the production capacity and the size of the separation granularity. In general, the production capacity and separation size increase with the increase of the diameter of the hydrocyclone.
2.Pipe diameter: The size of the inlet has a certain effect on the processing capacity, the grading granularity and the efficiency of the classification. The diameter of the feeding tube is increased, the size of the grade is thickened, and the diameter of the pipe is proportional to the diameter of the cyclone, Di= (0.2- 0.26) D
3.cone angle: When the cone angle is increased, the size of the grading is coarser and the cone angle is reduced, and the size of the grading is finer. General of fine materials using a cyclone classification, the cone angle is small, usually 10 ~ 15 degrees; coarse classification and concentrated hydrocyclone by large cone angle, usually between 20 and 45 degrees. The fluid resistance in a hydrocyclone increases with the increase of the cone angle. Under the same inlet pressure, the production capacity should be reduced because of the increase of fluid resistance. With the increasing size separation cone angle increases, reducing the total separation efficiency, and underflow mixed with fine particles less
4.Overflow pipe diameter: Increasing the diameter of the overflow pipe, overflow overflow flow increases, the grain size, the underflow of fine particles is reduced, the underflow concentration increased. According to the diameter of the cylinder, the diameter of the overflow pipe is determined. The range of the value is Do= (0.2- 0.4) D. The inner diameter of the overflow pipe is the most important dimension affecting the performance of the hydrocyclone, and its change will affect all the technological indexes of the hydrocyclone. When the inlet pressure is constant, in a certain range, the production capacity of the cyclone is approximately proportional to the diameter of the overflow pipe.
5.Insertion depth of overflow pipe: The insertion depth of the overflow pipe is the length of the overflow pipe inserted into the cyclone, which refers to the distance from the bottom of the overflow pipe to the top of the cyclone. The insertion depth of the overflow tube is reduced, the size of the classification is finer, the insertion depth of the overflow tube is increased and the size of the classification is coarser; the depth of the overflow pipe is usually inserted in the depth of h= (0.3-0.7) D
6.Overflow tube wall thickness: The research shows that the increase of the wall thickness of the overflow pipe can improve the separation efficiency of the hydrocyclone to a certain extent, and reduce its internal energy loss, and also improve the productivity of hydrocyclone.
7.Section size of inlet: The shape and size of the feed inlet have an important influence on its production capacity, separation efficiency and other industrial indicators. The main function of the inlet is to change the liquid flow of the linear motion to the circular motion at the inlet of the column. The intake port can be divided into two types: round and rectangular in accordance with the shape of the section.
8.Underflow diameter: The underflow diameter increases, the size of coal fine, underflow diameter decreases, the grain size grading. According to determine the diameter of hydrocyclone underflow diameter, the range of d= (0.15- 0.25) D, underflow is the most easy to wear parts in the cyclone
9.Inner surface roughness and assembly precision: Influence of hydrocyclone in surface roughness and assembly accuracy of its production capacity, separation efficiency and other performance parameters, but found in the production practice and Study on the internal surface of the lining, Xinhai wear rubber, hydrocyclone wear and corrosion resistance, relatively smooth, will increase the flow resistance, and the separation efficiency was also increased, at the same time the rough inner wall of the hydrocyclone, the flow resistance will be reduced, and the increase of the flow rate of bottom
10.Feed viscosity: The separation particle size is proportional to the square root of the feed viscosity, that is, the increase of the feed viscosity will lead to the increase of the separation particle size. The production capacity and the split ratio of the hydrocyclone will increase with the increase of the viscosity.
11.Cone ratio: cone ratio is the ratio of cone apex diameter and the diameter of the overflow hole ratio is the main parameter in the design of the cyclone, it is also an important factor in the operation adjustment of classification index. Cone ratio, small size grading, the cone ratio is small, large size grading; cone ratio ranges from 0.35 to 0.65), because the overflow hole diameter is not adjustable parameters, so in production mainly by changing different underflow to select the suitable ratio of cone

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