Magnetic lining plate for large ball mill
A magnetic liner and ball mill technology, applied in grain processing and other directions, can solve the problems of reduced reliability, high cost, and self-heavy weight, and achieve the effects of improving magnetic field gradient changes, reducing direct contact, and prolonging service life.
Pending Publication Date: 2022-08-02
YUXI DAHONGSHAN MINING
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Problems solved by technology
However, the existing metal magnetic liner changes the distribution of the magnetic field "peaks" and "troughs" on the surface of the liner only by adjusting the shape and different arrangement of the permanent magnets in it, in order to improve the friction on the surface of the liner. To maintain the long service life of the liner and improve the grinding capacity of the ball mill; but due to the structural limitations of the metal magnetic liner, it is difficult to have a large change in the shape and arrangement of the permanent magnets in the ordinary thin liner, so It is difficult to greatly improve the field strength change on the surface, which makes it difficult to significantly improve the grinding capacity of the ball mill; and although some liners change the structure or increase the thickness, the permanent magnets in it can form a horizontally and vertically poor Arrangement, so as to increase the change of field strength on the surface to improve the grinding capacity, but it will lead to a more complex structure of the lining plate, resulting in higher cost, and a thicker lining plate will also lead to excessive self-weight and reduce the capacity of the cylinder. The reliability of bulk adsorption, and the larger thickness will reduce the mineral loading capacity of the cylinder, thereby offsetting part of the grinding capacity, so it is still only used for industrial experiments on large ball mills, and has not been popularized so far.
Although the metal-rubber magnetic liner has a simple and reasonable structure, but its magnetic induction is low, it is only suitable for the second-stage ball mill liner with the grinding medium diameter ≤Ф60mm steel ball
Method used
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[0035] like figure 1 , 2 As shown in and 3, taking the iron series MQY6095 ball mill as an example, the metal protective shell of the magnetic liner of the φ6m ball mill is made of high-alloy non-magnetic steel with a hardness of 300~320HB. Up to not less than 2000GS. At the same time, press image 3 and 4 Design the top structures of the trapezoid unit 1 and the first plane unit 2 so that the width and length of the trapezoid unit 1 and the first plane unit 2 are the same, and at the same time, the widths of the plane groove I101, the inclined plane groove 102 and the plane groove II201 are equal, And inside it, frustum-shaped wear parts 4 are fixedly arranged at intervals along the length direction. Then, the trapezoidal units 1 are arranged back-to-back on the inner wall surface of the cylindrical body 3 of the ball mill, and then the first flat unit 2 is closely attached to the outside of the back-to-back trapezoidal unit 1, and the top of the first flat unit 2 is lowe...
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The magnetic lining plate comprises a trapezoidal unit provided with a protective shell and a permanent magnet, and a first plane unit, the upper end of the protective shell of the trapezoidal unit is provided with a plane groove I and an inclined plane groove, and the upper end of the protective shell of the first plane unit is provided with a plane groove II; the top surfaces of the plane grooves I and II are planes or cambered surfaces coaxial with the inner wall surface of the cylinder body; the top surface of the inclined surface groove is an inclined surface inclined downwards from the top end of the plane groove I; the trapezoid units form a splayed structure in the cylinder in a back-to-back mode, and the first plane units are arranged on the outer sides of the back-to-back trapezoid units. According to the invention, a small closed magnetic circuit is formed by the cylinder body, the lining plate and the protective layer through the structure and cooperation of the trapezoid and plane units, and a large closed curved magnetic circuit is formed by the cylinder body after integral installation, so that the magnetic circuit is not easy to fall off, the thicker protective layer is formed, and the ore grinding efficiency is not reduced and the magnetic field is not changed due to the property of ore; and the device has the characteristics of convenience in installation, long service life, energy conservation, consumption reduction and high ore grinding efficiency.
Description
technical field [0001] The invention belongs to the technical field of grinding equipment, and in particular relates to a magnetic lining plate for a large-scale ball mill with convenient installation, long service life, energy saving and consumption reduction, and high grinding efficiency. Background technique [0002] In recent years, with the continuous development of grinding technology, wet grinding has become the mainstream process, and overflow ball mills are widely used as the main equipment in wet grinding. The overflow type ball mill is mainly used for wet grinding of various ores. In the grinding process, while feeding the mill continuously, a certain amount of water is also continuously fed, so that the ground fine materials and water form a mixed fluid. The pulp is discharged from the mill in an artesian way to complete the grinding operation. However, in the continuous grinding process, a large amount of grinding media (steel balls) and materials are installed...
Claims
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IPC IPC(8): B02C17/22B02C17/10
CPCB02C17/22B02C17/10
Inventor岳金龙邵重阳唐国栋饶荣军刘壮福吴绍荣范远仁李泽志范帅庭王琛
OwnerYUXI DAHONGSHAN MINING