Machine to Remove Stones from Milled Rice

If you need a machine to remove stones from milled rice, a rice destoner can be considered as a downstream cleaning machine when the finished or partially processed rice contains stones, sand or other heavy impurities.

Why Can Milled Rice Still Contain Stones?

Stone contamination can enter the process with harvested paddy, during transportation or storage, or through handling and processing equipment. A pre-cleaning stage reduces this risk, but some operations may still require additional cleaning later in the line.

How Does a Rice Stone Remover Work?

A gravity vibrating destoner uses vibration, airflow and the density difference between grain and heavy impurities. Rice moves differently from denser stones, allowing the machine to separate the materials and discharge them through different outlets.

Remove Stones from Rice After Milling

A possible arrangement is:

Paddy → Rice Milling → Rice Destoner → Final Grading/Packaging

This arrangement is useful when the objective is final removal of heavy impurities from milled rice. The correct position depends on the existing line and the material being processed.

Remove Sand from Rice

Customers sometimes use the phrase rice sand remover when looking for equipment to separate sand and stones from rice. A destoner is designed for heavy impurities and should be selected according to the size, density and quantity of the contamination.

Should You Deston Before or After Milling?

These are not necessarily competing applications. Pre-milling destoning focuses on protecting the huller and milling equipment. Post-milling destoning focuses on final cleaning of the processed rice. Some processing systems can benefit from cleaning at more than one stage.

Questions to Ask Before Buying

• Is the material paddy, brown rice or white/milled rice?
• What is the required hourly capacity?
• What type of stones or heavy impurities are present?
• What is the existing rice milling process?
• What power supply is available?

Conclusion

A rice stone remover can be used as part of a final cleaning stage when heavy impurities remain in milled rice. For many rice mills, however, removing stones before hulling remains important because it addresses the problem before the stones reach the machinery.