BALL MILL LINER
What is a ball mill liner? The ball mill liner also called ball mill lining is installed in the ball mill cylinder, used to protect the cylinder wall from the impact and friction of materials and grinding media. It is an important ball mill spare part. Ball mill liners can be processed into different shapes by using different raw materials to adjust the movement of the grinding media. It helps to improve the grinding efficiency, increase the output, and reduce the metal consumption of the ball mill.
TYPES OF BALL MILL LINERS
To better protect the inner shell of the ball mill during the grinding process, liners are installed in different parts inside the ball mill and have specific callings, such as end cover liner, cylinder liner, trunnion liner, intermediate diaphragm, and discharge end grate plate. In addition, ball mill liners are available in a variety of shapes and materials to meet a wide range of applications.
Based on raw material, ball mill liners can be divided into high-manganese steel liners, high-chromium iron liners, alloy steel liners, and rubber liners.
High-manganese steel liner: it has a certain impact toughness. When impacted, the surface will produce cold hardening, tough and wear-resistant, with a hardness of HB300-350, an impact value of 700Nm/cm2, and a total life of about 5000-6000 hours. The high-manganese steel liner is commonly used in medium and small ball mills.
High-chromium iron liner: its wear resistance is more than 2 times higher than that of high-manganese steel liner, and it also has good resistance to high temperature and corrosion, which is a ball mill liner with a long life but a high price. High-chromium iron liners are mostly used in large ball mills and as coarse grinding bin liners in small and medium-sized ball mills.
Alloy steel liner: it has good physical properties, and excellent wear and impact resistance. The service life is more than twice that of high-manganese steel liners. The alloy steel liner can withstand even more significant impact forces. It can maintain the surface shape of the liner plate for a long time in operation to increase the ball mill output by more than 6%.
Rubber liner: the wear resistance is about 1.5-4 times higher than that of high-manganese steel liners, therefore, the service life is longer, which improves the operation rate of the ball mill and reduces the maintenance rate. In addition, the rubber liner mass is light, only 20kg, which reduces the overall energy consumption of the ball mill by 5%-10%. But it is not suitable for dry grinding and is mostly used in the wet ball mill and fine grinding chamber.
Based on shape, ball mill liners can be divided into smooth liners, step liners, wave liners, hemispheric liners, etc.
Primary-stage grinding: coarse grinding
Coarse grinding should use undulating liners, such as step liners and wave liners. This type of liner will lift the grinding media to a higher height, thus improving the impact capacity of the media and increasing the output of the ball mill.
Second-stage grinding: fine grinding
The smooth type liner makes grinding media easy to slide and roll, which enhances the grinding effect, therefore the fine grinding stage mostly uses smooth-shaped liners, such as smooth liners.
Smooth liner: the liner surface is flat or cast with patterns. It has a strong abrasive effect on the material, usually used with wave liners in a fine grinding chamber.
Step liner: the liner surface has stepped protrusions at a certain angle of inclination, which increases the thrust on the grinding media. It is suitable for coarse grinding.
Wave liner: it has a small crest and pitch and a small lifting coefficient. There are conical holes on the surface. It is mostly used in coal mills and rod mills for fine grinding.
Hemispheric liner: it is frequently applied in a coarse grinding chamber.
AGICO BALL MILL LINING FOR SALE
| Size | Hole Dia. (mm) | Ball Mill Liner Length (mm) | ||||
| Tolerance | ≤40 | ≥40 | ≤250 | ≥250 | ||
| +2 | +3 | +2 | +3 | |||
WHY CHOOSE AGICO
