Reasons and solutions for low output and coarse fineness of Raymond mill

Raymond mill plays a key role in the crushing and grinding process of materials. However, in actual operation, it often faces difficult problems such as low output and coarse particle size. These problems are not caused by a single factor, but the result of the influence of multiple factors. In order to effectively overcome these problems, it is necessary to conduct in-depth analysis from all aspects, accurately find the crux of the problem, and then “prescribe the right medicine”. Next, we will explain in detail the reasons for the low output and coarse particle size of the Raymond mill and the corresponding solutions.

If the feeding amount is too little, the grinding medium cannot fully play its role, resulting in a waste of resources; if the feeding amount is too much, it may cause saturation, making the grinding capacity of the equipment unable to be normally exerted.

Make sure to ensure uniform and continuous feeding, and operate strictly in accordance with the feeding standards specified by the equipment to ensure stable and efficient operation of the equipment.

Particle size is too large: When the material particles are too large, grinding in the Raymond mill will take more time and energy, which will undoubtedly lead to a decline in production. ​

Moisture content is too high: After the material with excessive moisture content enters the Raymond mill, it is very easy to form agglomeration, which not only affects the flow of materials in the equipment, but also greatly reduces the grinding efficiency. ​
Temperature is too high: When the material with too high temperature enters the equipment, it is easy to stick inside the Raymond mill, which greatly reduces the operating efficiency of the equipment. ​

Strictly control the particle size of the material entering the mill, and use pre-treatment methods such as crushing to reduce the particle size of the material to a suitable range; for high-moisture materials, add drying devices to ensure that the moisture content of the material is maintained in an appropriate range; for high-temperature materials, they must be cooled first, and then sent to the Raymond mill after the temperature drops to a reasonable level.

Causes and solutions for coarse product fineness

With the increase of usage time, grinding rollers and grinding rings will inevitably wear out. Once the wear is serious, the grinding effect will be greatly reduced, which will lead to the coarsening of the finished product. ​

Solution: Regularly and carefully check the wear of grinding rollers and grinding rings. If the wear exceeds the normal range, they should be replaced or repaired in time to maintain good grinding performance of the equipment.

If the main machine speed is too high, the coarse powder will be discharged prematurely without being fully ground, which will directly affect the fineness of the finished product. ​

Solution: By adjusting the motor current, the main machine speed of the Raymond mill can be accurately controlled within the appropriate range to ensure that the material has sufficient grinding time, thereby improving the fineness of the finished product.

Once debris enters the air lock valve, it may cause blockage, allowing coarse powder to enter the fine powder area, affecting the final fineness of the finished product.

Solution: Check the working status of the air lock valve regularly to ensure its normal operation. Once blockage is found, it needs to be cleaned in time to prevent adverse effects on the fineness of the finished product.

If the blade is made of poor material or has problems during installation, it may break or fall off during operation, which has a significant impact on the fineness of the finished product.

Solution: Choose high-quality blades and perform regular inspections and maintenance. Once a blade is damaged, replace it in time and ensure that it is installed correctly.

If you have any needs related to Raymond grinding, please feel free to contact CRONUS, we will serve you wholeheartedly.