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gravity destoner


Star Trace is a comprehensive high-tech enterprise, and specialized in the research and manufactures complete sets of de-stoner, grinding machines & blending machines that suit for different requirements of domestic and foreign market. The quality of products are reliable, all have passed the ISO9001 certification. They are well received in many countries of the world.

Star Trace De stoner is used to remove heavy foreign impurity like stone, metallic and glass pieces etc., on the principle of weight difference. This machine is widely used in the flour milling, rice milling, feed and food processing industries.

The material stream is stratified automatically on the working screen according to materials with different physical characteristics such as gravity, volumetric weight, coefficient of friction and suspension velocity etc. High density impurities such as stones can be reliable removal from a continuous material stream with high efficiency.


  • Advanced design and excellent fabricating.
  • Reliable and excellent stone separation and efficient cleaning.
  • High specific capacity.
  • Easy operation and maintenance.
  • Two options: with or without air-recycling system.
  • A fan is equipped on the air-recycling type and a special separator is installed ahead of the fan. The separator deflects the aspirated air through a lamellar system so that dust and chaff are separated from the air and discharged by an airlock valve while the cleaned air is recycled by the fan in the air return pipe to the de stoner.


Model Capacity(tone/hour) Power(kw) Weight(kg) Dimension(L×W×H)mm Type
STBD - 3 3 4.75 600 2200×1200×1600 Blowing type
STBD - 4 5 7 700 2500×1660×1600 Blowing type
STSD - 5 5 3.55 400 1300×1500×3200 Suction type
STSD -7 7.5 3.5 400 1450×1046×1800 Suction type
STSD -10 10 3.5 480 1450×1246×1920 Suction type


1. Technical data specification subject to change.

2. Customized Gravity De-Stoner can be made on request, Please send us Your's Technical data and application, required for our engineers to provide.