Distribution parameter simulation system of lengthened ball mill particle size distribution
A particle size distribution and simulation system technology, applied in the general control system, control/regulation system, comprehensive factory control, etc., can solve the problem that the spatial distribution of material properties is difficult to ignore, the material residence time is long, and the residence and change of materials cannot be accurately described and other issues, to achieve the effect of improving the grinding production operation level, saving commissioning costs, and avoiding a large number of industrial experiments
Active Publication Date: 2020-12-25
NORTHEASTERN UNIV LIAONING
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Problems solved by technology
However, in actual industrial production, the size of industrial mills is becoming larger and larger, the residence time of materials in the mill is longer, the spatial distribution of material properties is difficult to ignore, and the lumped parameter simulation method can no longer accurately describe the material in the mill cavity. residency and change
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[0052] Aiming at the lack of high-precision simulation of the grinding process at present, the invention proposes a distribution parameter simulation system for the particle size distribution of the extended ball mill. The main idea is: on the basis of discrete difference, carry out axial segmentation of the ball mill, and then use the lumped parameter simulation method to conduct random analysis on each segment of the sub-mill, so as to establish a probability model of the grinding process, and finally complete the process by sampling Simulation of the grinding process. Simulation results prove that this method has high accuracy and can reflect the randomness of the grinding process.
[0053] Such as figure 1 As shown, it is a block diagram of the overall structure of the distribution parameter simulation system of the particle size distribution of the extended ball mill of the present invention, including four modules:
[0054] Parameter setting module: set the length and ...
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The invention relates to a distribution parameter simulation system for the particle size distribution of an elongated ball mill. The steps are: setting various parameters; dividing the mill into J sections axially and N particle grades radially; according to the size of each section of the mill. The number of particles in each particle size, the forward movement proportion and the backward movement proportion of materials in the mill per unit time, calculate the tendency function and step time of each sub-mill, and further determine the sub-mill where the corresponding event occurs; use lumped summing The parameter simulation method determines the particle size of the event; determines the cause of the event, and updates the number of particles of each particle size of each sub-mill in the mill; repeat the above steps until the total grinding time is reached, and obtain the particle size of each sub-section after grinding by the ball mill. The number of grinding particles for each particle size in the mill; calculate the particle size distribution after grinding by the ball mill. The invention can simulate the random crushing of particles in the axial direction of the mill, accurately depict the flow of particles in the radial direction, and provide model support for the control loop of mineral particle size distribution.
Description
technical field [0001] The invention relates to the simulation and simulation technology of the grinding process of a ball mill, in particular to a distribution parameter simulation system for the particle size distribution of an elongated ball mill. Background technique [0002] The ore grinding process is an important part of the industrial beneficiation process. It is widely used in the production of raw materials in industries such as steel, cement, and electric power. It is mainly responsible for grinding the mineral raw materials with impurities, so that the minerals and gangue phases are separated. , so as to provide suitable mineral processing raw materials for mineral processing operations, so the quality of grinding products directly affects the quality of mineral processing operations. The particle size distribution of materials is an important index to measure the quality of grinding products, and it can reflect the degree of grinding of materials. If the grindi...
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IPC IPC(8): G05B19/418
CPCG05B19/41885G05B2219/32339Y02P90/02
Inventor 蔚润琴卢绍文刘鑫
Owner NORTHEASTERN UNIV LIAONING