How to ensure finished product fineness of Raymond mill

To ensure the fineness of the finished product when using the Gypsum Mill Raymond Mill YGM95, the following measures can be taken:

1. Control of Material Input

1-1.Uniform Feeding: Ensure that the gypsum is fed into the mill in a uniform and continuous manner. Irregular feeding can lead to fluctuations in the grinding process and result in inconsistent fineness. Automatic feeding devices can be employed to maintain a steady feed rate, allowing the mill to operate under stable conditions and better control the grinding outcome.
1-2. Pre-treatment of Material: As mentioned before, check the material's properties before feeding. Remove large lumps or impurities through screening processes. If there are oversized particles entering the mill, they may not be ground thoroughly, affecting the overall fineness of the final product. For example, using a vibrating screen to sift the gypsum can help in getting a more consistent particle size for input.

2. Optimization of Equipment Operation

2-1.Proper Adjustment of the Classifier: The classifier is a crucial component in determining the fineness of the output.
--Rotation Speed: Increasing the rotation speed of the classifier will make it more selective in retaining larger particles, forcing them to be further ground, and thus resulting in a finer product. For instance, if the current rotation speed is set at a certain value and the product fineness is coarser than desired, gradually increasing the speed while observing the product quality can help achieve the right fineness.
--Blade Clearance: Adjusting the blade clearance also impacts the classification effect. A smaller blade clearance will allow for finer separation of particles. Operators can make small adjustments to the blade clearance based on the actual fineness requirements and test runs to find the optimal setting.

2-2.Airflow Regulation:
-Wind Speed: The airflow within the mill is responsible for carrying the ground powder and influencing the classification process. By adjusting the wind speed of the blower, the carrying capacity and the separation of different particle sizes can be controlled. A higher wind speed can carry away finer particles more effectively, but if it's too high, it may also cause excessive loss of fine powder. Conversely, a lower wind speed may lead to insufficient powder removal and affect the grinding efficiency and fineness. Experimenting with different wind speed settings and observing the product quality is key to getting the right balance.
-- Air Duct Valve Adjustment: Manipulating the opening of the air duct valve can direct and regulate the airflow path and intensity. Closing or opening the valve to an appropriate degree can help optimize the flow of air within the mill to ensure that the ground particles are properly classified and the desired fineness is achieved.

3. Regular Equipment Maintenance

3-1.Grinding Component Inspection: Regularly check the condition of the grinding rollers and grinding rings. Worn or damaged grinding components will not be able to grind the gypsum effectively to the required fineness. Replace these parts when excessive wear is detected to maintain the grinding performance. For example, if the grinding surfaces of the rollers or rings become uneven due to wear, it can lead to inconsistent grinding and coarser output.

3-2.Sealing Maintenance: Ensure good sealing of the equipment to prevent air leakage. Air leakage can disrupt the designed airflow patterns inside the mill, which in turn affects the powder carrying and classification processes. Check and replace aging or damaged sealing rings at pipe joints and other key areas regularly to maintain the proper internal environment for grinding and achieving the correct fineness.

4. Quality Monitoring and Feedback

4-1.Sampling and Testing: Frequently take samples of the finished product during the production process. Use appropriate testing equipment like particle size analyzers to measure the fineness of the samples accurately. Compare the measured results with the target fineness specification. Based on the comparison, make timely adjustments to the operation parameters of the mill, such as the classifier settings or airflow parameters.

4-2. Record Keeping and Analysis: Keep detailed records of the production parameters (like feeding rate, classifier speed, wind speed, etc.) and the corresponding fineness results of the samples. Analyze these records over time to identify trends and patterns. This way, it becomes easier to predict and control the fineness of the product more precisely and make proactive adjustments to the production process before significant deviations occur.

By implementing these strategies comprehensively, the fineness of the finished product from the Gypsum Mill Raymond Mill YGM95 can be effectively ensured to meet the specific requirements of different applications.