Key Conclusion: The core of destoning for cleaning sesame seeds lies in separating sesame seeds from sand and gravel based on their specific gravity difference. The process can be summarized as “pretreatment → feeding → gravity separation → graded discharge → equipment cleaning”.
1. Pretreatment Stage: Remove large impurities by manually picking or filtering large particles such as straw and clods of soil from the sesame seeds.
Control the moisture content of the sesame seeds to ensure a suitable level of moisture and prevent clumping that could affect the separation effect.
2. Feeding Operation: Start the destoner and run it idle to preheat, checking for stable operation and any damage to the screen surface.
Feed the sesame seeds evenly through the hopper, controlling the feed rate to avoid overloading and incomplete separation.
3. Core Step of Gravity Separation: Sesame seeds and sand/gravel enter the separation screen. The equipment uses vibration or airflow to generate force.
The heavier sand/gravel (pebbles, clods of mud) adheres to the screen surface and moves towards the sand/gravel outlet.
The lighter sesame seeds float above the screen surface and flow towards the sesame seed outlet, completing the separation.
4. Grading and Inspection: Sesame seeds and gravel are collected separately. Samples are taken to check for residual gravel in the sesame seeds. Seeds that fail to meet standards are returned for reprocessing.
Qualified sesame seeds proceed to the next processing step. Gravel is collected and disposed of centrally.
5. Equipment Cleaning and Maintenance: After operation, the feed is shut off, and the equipment is allowed to idle for a short time to discharge any remaining material.
The screen surface and discharge port are cleaned, and components such as the screen mesh and vibrating motor are inspected to ensure proper operation for the next use.
Post time: Nov-18-2025
