The Selection and Design of Mill Liners
Selection of the composition and type of materials for the production of liners is very important. Often, according to the type of application of the liners, the best materials for the construction of these liners should be selected, in order to obtain the maximum efficiency from them. For this reason, often made of handmade materials, castings or ready-made molds for liner production.
Ball mill is one of the industrial devices that needs to use the best and most quality liners. Due to the type of ball mill operation, as well as the amount of materials or rocks that are to be crushed, the mill size and mill strength, the degree of corrosion and erosion of the mill, the ball size, the speed of the mill and other types of factors, The ball mill liner is chosen and instruction, but it is very important to make ball mill liners, they are made seamlessly and with single-handed materials without any type of connector. For this reason, the design of the ball mill liners must be integrated and the use of separators is wrong.
In order to manufacture a variety of ball mill liners, today steel is one of the best materials for making a variety of primary applications or secondary uses for not only liner but also most other parts of the ball mill, which, of course, use traditional roots steel and year It has been proven as one of the best materials, and it can be claimed that there are still no better materials than steel for making these types of parts that guarantee high quality and durability and have a good performance in machines such as ball mill liner.
But any steel, however, is not suitable for producing mill liners, and according to the type of milling, and considering the strengths of any steel sheet, it is necessary to choose the best type of steel for making these liners. For this purpose, the most important steel sheets with excellent durability and excellent performance are:
Austenitic Manganese steel (AMS):
Typically, this type of steel is used to make lighter mills with smaller dimensions, which are used in smaller factories and production lines, and do not require grinding large and heavy pieces. This type of steel is extremely resistant to extreme stress and pressure, and is able to maintain its hardness and ability in hard conditions, without breaking or fractures it, which, in the face of using them to produce ball mills can easily be used for difficult conditions.
This type of steel expands with the help of a blow that makes the solid layers extremely hard, and therefore can not be easily removed, and can cause damage to the crust of the mill by creating a superficial stress and it can be dangerous.
Low Carbon Chrome Moly Steel (300 to 370BHN):
It is often used to produce AG, SAG or Ball liners, of this kind of sheet that is made before upgrading to higher carbon content steel.
This type of steel plate is also very durable against the impact and is also the best type of coating that has excellent resistance and durability. Mainly in this case, this type of sheet is used to produce discharge terminals because their impact strength is higher than high-carbon crystalline steel or cross-section thin sheets.
High Carbon Chrome Moly Steel (325 to 380BHN):
For the SAG ball mill, there is no doubt that there is no better steel than this type of steel. However, to produce a ball mill, depending on the type of use and the use of the ball mill, a change in the content of carbon or chromium should be made.
Most changes in the chromium and carbon content of this type of steel are in order to improve the resistance to the size of the liners and the thickness of the parts. Although there is still a lot of research and experimentation to create more resistance and tolerance to this type of steel, so that the size of the liners is more standard than the standards for Chrome steel.