Distribution parameter simulation system for particle size distribution of lengthened type ball mill
A technology of particle size distribution and distribution parameters, applied in general control systems, control/regulation systems, comprehensive factory control, etc., can solve the problem of long material residence time, inability to accurately describe material residence and changes, and material properties The spatial distribution is difficult to ignore. and other problems, to achieve the effect of saving debugging costs, improving the level of grinding production operations, and avoiding a large number of industrial experiments
Active Publication Date: 2018-12-25
NORTHEASTERN UNIV
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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 particle size distribution of a lengthened type ball mill. The system comprises the steps of: setting various parameters; dividing the mill into J segments in a axial direction and into N particle size in a radial direction; calculating the trend function and the stepping time of each segment of sub-mill according to the number of particles of each particle size in each segment of mill, the proportion of material in the mill moving forward in unit time and the proportion of moving backwards; further determining the sub-mill corresponded to the event occurred; determining a particle size of the occurred event by adopting a lumped parameter simulation method; determining the reason why the event occurred; updating the number of particles of each particle size in each segment of sub-mill in the mill; repeatedly executing the above steps until the grinding total time is reached; obtaining the number of ore grinding particles of each particle size in each segment of the sub-mill after grinding by the ball mill; and calculating the particle size distribution after grinding by the ball mill. According to the distribution parameter simulation system for particle size distribution of a lengthened type ball mill, random crushing of particles in the axial direction of the mill can be simulated; the flow of particles in the radial direction is accurately characterized, so that model support is provided for control loops 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