The following is a detailed introduction about grinding rollers and grinding rings:
1.Grinding Roller
The grinding roller is the main grinding component of Raymond mill, usually distributed in pairs or groups, rotating around the central axis to compact and grind materials.
Function
Rolling material: The grinding roller presses against the grinding ring under centrifugal force, crushing the material.
Power transmission: The grinding operation is achieved by driving the grinding roller to rotate through the main shaft.
Adjust fineness: Control the discharge fineness by adjusting the gap between the grinding roller and the grinding ring.
Structural characteristics
Material: High manganese steel, alloy steel or other wear-resistant materials are usually used to extend the service life.
Shape: The grinding roller is cylindrical or conical in shape, with a smooth surface or grooves to enhance the grinding effect.
Installation method: The grinding roller is installed on the plum blossom frame through bearings, and its position can be flexibly adjusted.
Maintenance and replacement
Regularly check the wear of the grinding rollers and replace severely worn ones in a timely manner.
Maintain lubrication and reduce bearing wear.
2、 Grinding Ring
The grinding ring is a ring-shaped component fixed inside the Raymond grinding machine, which cooperates with the grinding roller to complete the grinding of materials.
Function
Cooperate with the grinding roller for grinding: The grinding roller is pressed against the grinding ring under centrifugal force, and the material is crushed between the two.
Supporting material: The grinding ring provides a supporting surface for the material, ensuring a stable grinding process.
Structural characteristics
Material: High manganese steel or wear-resistant alloy is usually used to improve durability.
Shape: The grinding ring has a circular structure with a smooth or toothed inner surface to enhance grinding efficiency.
Installation method: The grinding ring is fixed inside the host and cannot be moved.
Maintenance and replacement
Regularly check the wear of the grinding ring and replace severely worn ones in a timely manner.
Clean the surface of the grinding ring to prevent material accumulation from affecting the grinding effect.
3.The coordination between grinding roller and grinding ring
Working principle: The material enters the Raymond mill from the feeding port and falls onto the grinding ring. The grinding roller presses against the grinding ring under centrifugal force, crushing the material. The fine powder after grinding enters the classifier with the airflow, while the coarse powder returns to continue grinding.
Gap adjustment: By adjusting the gap between the grinding roller and the grinding ring, the discharge fineness can be controlled. The smaller the gap, the finer the discharge.
4.Common problems and solutions
Severe wear and tear
Reason: The material has high hardness or the grinding time is too long.
Solution: Choose materials with higher wear resistance, regularly inspect and replace worn parts.
Decreased grinding efficiency
Reason: The gap between the grinding roller and the grinding ring is too large or the surface wear is uneven.
Solution: Adjust the gap, repair or replace worn parts.
High equipment vibration
Reason: The installation of the grinding roller or ring is unbalanced or severely worn.
Solution: Check and reinstall the grinding roller and grinding ring to ensure balance.
5. Application Fields
Raymond mill is widely used for grinding non-metallic minerals, such as:
Limestone: used for the production of cement, coatings, etc.
Barite: used as a weighting agent for petroleum drilling.
Bentonite: used in industries such as casting and drilling.
Gypsum: used in building materials, chemical industry and other fields.
6.Summary
The grinding roller and grinding ring are the core components of Raymond mill, and their performance directly affects the grinding efficiency and finished product quality of the equipment. Reasonable selection of materials, regular maintenance, and timely replacement of worn parts are key to ensuring the efficient operation of Raymond mills.
