Ball mill lining board function and choice
Grinding ball wear resistance than making the intrinsic qualities of grinding ball material. Although its wear resistance associated with grinding ball original nature, but with the mill types, specifications, ball mill liner, dry or wet grinding, ore properties, material composition, particle size, pulp concentration and acidity, and index of final product requirements is close. Therefore, according to the principle of "hardness, wearability is good" select grinding ball is clearly one-sided, so must be combined with the working condition of grinding ball and replenish onr's stock (grinding ball) by synthetically considering all kinds of channels, reasonably choose pay a minimum medium grinding ball processing tons of material. Choice of grinding ball countermeasures are the following: high manganese steel material and the traditional form of ball mill liner is not appropriate, combination of solid plate epochal design has great superiority, completely solve the problem of broken bolt, powder leakage, reduce maintenance quantity more than 98%; Composite plate can give full play to all kinds of high hardness material quenching hardness, make it play the best anti-wear performance. In the dry process, power plants, cement plants should give preference to double medium quenching medium and low chrome alloy steel ball mill lining board or high chromium cast iron, high chromium cast steel lining board, choose high hardness of high chromium cast iron grinding ball. Double medium quenching medium and low chromium alloy steel has good economic benefit; In mine, in wet process from an economic point of view, using high priority, medium carbon alloy steel plate or Cr10 ~ Cr20 series low carbon content of cast iron plate and high hardness, low chromium alloy grinding ball. But more than 110 mm diameter of grinding ball with high carbon alloy steel forged balls should be taken into account. Ball mill lining board and grinding ball match should be "substrate" point of view, and in the service life of the lining board under the premise of guarantee the two overhaul time, should choose the best antiwear properties of grinding balls. The hardness of ball mill liner should be greater than HRC50, chromium molybdenum alloy casting grinding ball hardness should be greater than HRC52, forged steel grinding ball hardness should be greater than HRC55. Generally the best grinding ball as far as possible choose anti-wear performance. 1, improve grinding media - ball and section, 2, grinding effect, 3, protect grinding cylinder. Choose a variety of lining board main consideration is effect to the promotion of grinding media, media products. Have the liner material in chromium molybdenum alloy steel, alloy steel, high chromium cast iron, manganese steel, rubber, polyurethane, etc. Shape with ribbed, corrugated, spiral Angle and so on. When is given priority to with crushing requirements recommended lining surface grinding body ability is stronger, the lining at the same time should have good shock resistance, high manganese steel ZGMn13 have enough resistance to impact toughness, but don't wear resistance and easy deformation, now most is to switch to double in the quenching process of medium alloy steel or chromium molybdenum alloy steel plate. Comparing several kinds of wear resistant material, with the double medium quenching process of alloy steel, the optimal performance and using life expectancy, its advantages are more obvious in large and medium-sized ball mill and the highest cost performance.