Method for determining separation size of hydrocyclone

A hydrocyclone and particle size separation technology, which is applied in the field of determining the separation particle size of hydrocyclones and grading hydrocyclones in mineral processing, can solve the problems of poor accuracy and breadth of use, improve accuracy, save manpower and material resources, Effects of Applicability and Reliability Enhancement

Inactive Publication Date: 2015-03-25
ANSTEEL GRP MINING CO LTD
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AI-Extracted Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method that can accurately determine the separation particle size of a hydrocyclone under any working condition, fundamentally solve the problem that the existing separa...
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Abstract

The invention relates to a method for determining separation size of a hydrocyclone. The method includes steps of 1, determining structural parameters of a target hydrocyclone, operation parameters of a target working condition and physical parameters of materials to be separated; 2, establishing a flow field domain calculating model according to the above parameters and dissociating the model, and determining boundary conditions and initial conditions for calculation at the same time; 3, performing analog calculation to solve by means of computation fluid mechanics business software and discrete element business software; 4, generating a size distribution curve of the materials to be separated in overflow and sand settling products according to the analog calculation results, and accordingly determining the separation size d50 of the hydrocyclone under the target working conditions. The problem that existing separation size calculation formulas or curves are poor in using accuracy and range is thoroughly solved. The method has the advantages of low cost, high result accuracy, wide application range and the like and is more convenient and quick and labor and material saving as compared with actual separation test.

Application Domain

Special data processing applications

Technology Topic

Computational modelSoftware +4

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  • Method for determining separation size of hydrocyclone
  • Method for determining separation size of hydrocyclone
  • Method for determining separation size of hydrocyclone

Examples

  • Experimental program(1)

Example Embodiment

[0022] The following is an example of separating quartz and hematite particles with a Φ50mm hydrocyclone to illustrate the application effect of the present invention.
[0023] 1. Determine the parameter conditions of the hydrocyclone (including structural parameters and operating parameters) as shown in Table 1.
[0024] Table 1 Parameter list of Φ50mm hydrocyclone
[0025]
[0026] 2. Determine the operating parameters of the target working condition as follows: feed pressure 0.1MPa and feed concentration 10%.
[0027] 3. Determine the physical parameters of the material to be separated: the separation medium is water, and the air column of the hydrocyclone is also considered. The density of water is 998.2kg/m 3 , The dynamic viscosity is 1.003×10 -3 Pa·s; the density of air is 1.225kg/m 3 , The dynamic viscosity is 1.7894×10 -5 Pa·s; the density of quartz is 2673kg/m 3; Hematite density is 4858kg/m 3; The particle size composition of the quartz and hematite to be separated is shown in Table 2.
[0028] Table 2 Grain size composition of quartz and hematite.
[0029]
[0030] 4. See figure 2 Establish the calculation model of the flow field based on the above parameters (3D model creation software such as ANSYS Design modeler and Solidworks can be used) and discretize it (meshing software such as ANSYS Meshing and ICEM CFD can be used). The instantaneous velocity vi of the fluid at the inlet of the hydrocyclone is measured repeatedly for 20 times, and the details are shown in the following table, and the average velocity can be obtained =6.08m/s, so the turbulence intensity at the entrance boundary I=4.51%. The initial conditions of the simulation calculation refer to the actual situation, that is, the hydrocyclone is filled with air at the beginning.
[0031]
[0032] 5. Respectively use computational fluid dynamics (CFD) commercial software Fluent and discrete element (DEM) commercial software EDEM to simulate and calculate the solution. During the solution process, check the longitudinal section distribution of the material particles to be separated in the hydrocyclone, such as image 3 Shown.
[0033] 6. According to the simulation calculation results, the particle size distribution curves of the quartz and hematite particles in the overflow and grit products are obtained, such as Figure 4 , Figure 5 As shown, it can be obtained that under the selected hydrocyclone and working conditions, the separation particle size of quartz is about 3.1μm, and the separation particle size of hematite is about 2.1μm. After comparing with the physical test results and some empirical formulas, It can be verified that this method has high accuracy.
[0034]

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