Semi-autogenous mill lining plate shape optimization method based on discrete element method

Abstract

The invention relates to a semi-autogenous mill lining plate shape optimization method based on a discrete element method, and belongs to the technical field of mineral processing equipment. The method includes: carrying out multi-point sample collection and parameter measurement on characteristic parameters of physical and mechanical properties of ore to be ground, steel ball dielectric materialcharacteristics, material characteristics of a semi-autogenous mill cylinder lining plate and structural characteristics of the ore to be ground entering the semi-autogenous mill; establishing an irregular ore model and a medium particle model, and establishing a discrete element simulation contact model; establishing a semi-autogenous mill cylinder three-dimensional solid model, and establishinga discrete element simulation model; adopting a discrete element simulation model to carry out different semi-autogenous mill lining plate shape analog simulation experiments, and obtaining collisionenergy loss, collision probability and motion conditions of a semi-autogenous mill load under different lining plate shape conditions; and determining proper shape parameters of the lining plate of the semi-autogenous mill. An effective technical means is provided for large-scale application of semi-autogenous mill lining plate shape optimization and discrete element simulation in the industrial field.

Description

technical field [0001] The invention relates to a method for optimizing the shape of a liner of a semi-autogenous mill based on a discrete element method, and belongs to the technical field of mineral processing equipment. Background technique [0002] The function of the semi-autogenous mill liner includes two aspects. One is to protect the mill cylinder from the direct impact of ore and steel balls. Throwing or cascading to achieve crushing and grinding of materials. [0003] According to the statistics of Sar Cheshmeh Concentrator in Iran, the liner replacement time accounts for 13% of the total downtime. The change of the shape of the liner of the mill will affect the movement state of the media and materials in the semi-autogenous mill, which will cause the liner to break due to impact, and then affect the service life of the liner of the semi-autogenous mill. [0004] At home and abroad, a lot of research has been done on the shape design of the semi-autogenous mill ...

AI Technical Summary

Problems solved by technology

At the same time, the discrete element method can analyze the collision energy loss, collision probability and particle movement state results inside the mill, which can solve the situation that although the particle movement in the mill is complex, the movement state of the particles inside the equipment cannot be obtained theoretically, and realize Through visual simulation analysis, experimental parameters that are difficult to measure under realistic conditions are obtained, and an optimization plan is provided for improving the service life of semi-autogenous mill liners

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