Impact ball mill liner wear failure analysis of key factors

Ball mill mine processing equipment is an essential part of many users complained that the ball mill ball mill liner life is short, high production costs. Impact ball mill liner life of the main factors, to the ball mill for reference, in production to avoid a similar situation to improve ball mill liner life.http://www.prmindustry.com/Abstract...Articles section     1, the impact of media

    The media have often broken ball: various mining materials (manganese, copper, tungsten ore, chrome ore, etc.), various types of stone (limestone, granite, gneiss, basalt, gray rock, etc.), used in power industry of coal. Medium hardness index is an important decision based on failure of liner wear, the higher the hardness, the shorter the life of the liner, on the contrary, the use of cyclical growth. Coal fuel thermal power plants is the main rolling mill grinding media, the coal around the country can wear coefficient is generally 0.8 to 2.0, if mixed with too much coal gangue, sand, stone, not only the lack of heat, and can grind the poor, will inevitably lead to premature failure of liner.

    2, the impact of operating conditions

    ⑴ eliminate defects not timely. For example, loose bolts fall, break off individual liner, if no timely replacement of the defect gradually extended, will bring disaster to the other cylinder liner and cause distortion.

    ⑵ the rate is not normal, adjusted properly, there short positions running, hit some balls and direct friction cylinder liner, the formation of two-body wear, liner and the ball of this fragmentation, a significant increase in opportunities to wear, is a very bad mode of operation.

    3, the impact of liner material

    From the liner on the analysis of physical properties of materials, the effect of the main parameters affecting wear hardness and impact toughness is the matching of the two indicators, high hardness, its wear resistance, and is basically a proportional relationship, the ball running them, the ball is falling the state was the waterfall, and the lining of the material will have a impact energy, impact energy depends on the size of the ball diameter and the diameter of the size of the grinding tube.

    4, the design and manufacture and installation of quality of

    Lining the role of roughly two, one is to protect the cylinder, followed by the speed of the ball in a specific upgrade to the required height, the ball was falling like waterfalls, rolling mill to achieve the desired effect.

    Liner made of poor quality, such as uneven, tube wall deformation, when the liner and the liner installation, liner and the cylinder wall and fit between their own casting defects, mechanical properties, chemical composition does not meet eligibility requirements, etc., affect the normal operation of the mill direct factor.

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 Peter  Huang