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Why ball mill liner is easily damaged

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Why ball mill liner is easily damaged

July 15, 2023 nflg 0 Comments

The ball mill is basically used in mining processing, and clients form many countries may complain that the service life of ball mill liner plate is too short. Today, NFLG will explain why the ball mill liners is so easy to be damaged and tell about methods to prolong the service life of ball mill liner boards.

1.Influence of grinding medium

The ball mill often grind all kinds of raw materials, they are mining material s(copper,manganese ore, chrome ore, manganese ore), all kinds of non-metallic minerals ( limestone , granite, green stone) and coal used by electricity industry. The hardness index of medium decided the performance of ball mill liners, the higher hardness of lining board, the shorter of service life, on the contrary, the using cycle of the liner will grow.

2.Influence of operation
1)If there is defect, for example,bolt looseness and drops,individual liners falls,timely repair is needed. If the broken parts are not changed in time, defects will gradually spread to other section of the machine, making larger damages to other lining board and cylinder.

2)If situations that is with non-uniformly feeding, improper adjustment and empty cavity working appeared, the steel ball would directly rub and hit on th cylinder and other liner boards, this kind of circumstance would greatly increase the wear down opportunities of the liner plate and steel ball, even caused both destruction. Of cause, it is a very terrible operating style.

Influence of liner materials

According to the physical properties of the liner plate,the main parameters that affect anti-wear effect are matching rate between hardness and impact toughness, the higher the hardness of the material, the better anti-wear ability, and they may achieve a direct ratio,making the balls fall like waterfall and impact on the liner board in operation process.The impact strength is decided by the size of the steel balls and the cylinder.

Influence of design, manufacture and installation technology

Liner board had two function: the first one is cylinder protection, the other is to lift the steel ball to a demand height at a specific speed, making steel balls fall like a waterfall and achieve the ideal effect of grinding. If the quality of liner board is too poor and uneven, or is coarsely casted, when installation, misfit between liners and cylinders, substandard mechanical properties and chemical ingredients are all factors that affects the normal operation of the ball mill.

If operate and use our ball mill in a right methods, bad defects will be avoid and this will greatly extend the service life of theball mill liner board.

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