7 Types of Grinding Mill Liner Materials

These days, it is common to use liner-handling machines for large mills. This has led to a growth in the need for and use of large liner blocks. It is extremely advantageous and can reduce the time for relining. In smaller mills, one has to manually set up the lines. Naturally, the industry prefers smaller blocks that come with removal lifter bars. Find out about the 7 different types of materials used in grinding mill liners.

Ceramic Liners

An extremely hard product, ceramic is highly abrasion-resistant. High alumina ceramic is the commonest ceramic liner. High temperature applications, resistance to corrosion, low coefficient of thermal expansion, extended lifespan and high resistance to abrasion are some of the main advantages.

Ceramic Combination Composite

Composite mill liners were created to benefit with the ceramics high resistance power to abrasion as well as the elastomer’s energy absorbing features. There are the benefits of improved resistance to abrasion, noise reduction, urethane’s energy absorption, comparatively lower coefficient of thermal expansion and resistance to corrosion.

Magnetic Metal Liners

The China Metallurgical Mining Corporation has developed a new technology in order to prevent quick wearing down of the rubber liners. The magnets allow the lining to stay ‘in touch’ with the end plates and the steel shell without the use of bolts. Some of the main benefits include longer life, reduced consumption of power and higher effective mill volume. These are lighter and thinner than steel.

Grid Type Liners

It is similar to magnetic metal liners, with only a grid type structure distinguishing it. These were created in South Africa and the liners are extremely low-cost for highly abrasive ores. These are light in weight. The inside of the liners are filled with balls, and these work as a perfect wear material. These are made out of manganese steel that can make removal tough, and spreads often.

Rubber Liners

Lifters have been constructed for decades out of strong abrasion resistant rubber to ensure good use in field, which ensures the capacity of the lifters to resist persistent pounding during milling operations. Some of the main advantages of rubber mill liners include no leakage, reduced weight, reduced noise level, less maintenance requirements, lower cost and longer operation life. These are easier and lighter to handle, and can reduce the consumption of power. The lifespan of pinion or bearing is longer.

Abrasion Resistant (AR) Steel

AR steel classifies alloy and carbon steels that are designed especially for better resistance against abrasion. The main benefits include comparatively lower co-efficient of thermal expansion, ease of installation, workability, wide variance in alloy composition and hardness to custom-fit the application, medium cost and more.

Ultra High Molecular Weight (UHMW)

A polyethylene plastic, HMW can be found in different formulations. It is usually agreed that either chemical cross-linking or natural cross-linking at the time of UHMW manufacture can increase abrasion resistance. Some of the prime advantages include resistance to corrosion, low weight per square foot, low co-efficient of friction, easy installation, workability, low cost and reduced water absorption that lowers the possibility of liner material being frozen.