TQSF Gravity Grading Stoner Sand Soil High Density Impurity Cleaning Machine

The TQSF Gravity Grading Stoner is mainly used for cleaning up the light mixed sand, soil and high density impurities that remain in grain after the first cleaning stages. It works by gravity grading: the grain is fluidised on a vibrating, air supported deck so that particles of different density and suspension speed stratify, and the heavier sand, soil and stone are separated from the lighter grain. Clean grain is essential before husking, milling or storage, because residual sand and stone damage downstream machines and reduce flour and rice quality.

The stoner is a compact machine that fits easily into an existing grain cleaning line. A vibrating screen or deck carried on elastic supports is combined with a suction fan that draws air up through the deck, so the material bed behaves like a fluid and separates by density. The heavier impurities discharge at one outlet while the graded grain leaves at another, and the air volume and deck angle can be adjusted to match different grains, moisture contents and throughputs so that the separation stays sharp through the season.

• Gravity grading: clean up light mixed sand, soil and high density impurities by fluidised bed separation.
• High density separation: particles are split by density and suspension speed on a vibrating deck.
• Suction air support: a fan draws air through the deck so the bed behaves like a fluid.
• Adjustable setting: air volume and deck angle can be tuned to different grains and throughputs.
• Compact and durable: a compact machine that integrates into an existing cleaning line.
• Protects the line: removes abrasive sand and stone before husking, milling or storage.

The gravity grading stoner is applied in the cleaning section of grain and rice mills, and it is also used in seed cleaning plants. It sits after the primary cleaning and destoning stages and before husking, whitening or milling, removing the last of the sand, soil and heavy impurities from paddy, wheat, corn and other grains so that the downstream machines run reliably and the finished product keeps a clean appearance and low ash or sand content.

The stoner is shipped as a compact unit with the deck, fan and drive protected and braced for sea transport. We provide an installation and adjustment guide and an operating manual, together with a twelve month warranty on the frame, deck and fan.