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Bean Cleaning Line
TQSF/TQSFB De-stoner
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The TQSF/TQSFB Series De-stoner is a gravity separator for removing stones, glass, and metal from grain. It combines vibration and upward airflow: heavy contaminants sink, clean grain floats and discharges separately. Achieves removal of even small, kernel-sized stones. Available in 11 models with capacities from 1 to 22 t/h for wheat. Offers air-recycling option—self-contained unit or connection to central aspiration.
This machine protects downstream equipment (mills, packaging) and enhances product purity. Positioned in cleaning sections, it serves operations of all scales. Flexible configuration based on facility infrastructure makes it ideal for grain processors requiring reliable, high-efficiency de-stoning.
Key Features
High-Efficiency Removal of Stones, Glass, and Dense Contaminants
This De-stoner removes stones, glass, metal, and even small kernel-sized stones through combined vibration and upward airflow. Heavy contaminants sink, clean grain floats. Protects downstream mills and packaging from damage while enhancing final product purity. Ideal for wheat, rice, corn, and coffee processing where rigorous contaminant removal is essential.
Dual Principle Operation: Gravity Separation With Airflow Classification
Vibration stratifies material by density; upward airflow fluidizes the grain bed, lifting clean grain away from heavy impurities. This synergistic density separator achieves higher efficiency than either principle alone. Dual vibration motors and adjustable airflow ensure precise control, delivering consistent separation across varying grain types, moisture levels, and contamination loads.
Air-Recycling Option for Flexible Installation
Choose between self-contained air-recycling (TQSFB models) for stand-alone operation without central aspiration, or standard models for connection to existing dust collection systems. Both deliver the same high efficiency. This stone removal machine adapts to facility infrastructure, reducing installation costs and simplifying integration—ideal for plants without centralized air systems.
Comprehensive Downstream Equipment Protection
By removing hard contaminants upstream, the De-stoner extends the life of roller mills, hammer mills, and pulverizers, preventing costly damage and unplanned downtime. Particularly effective against small, kernel-sized stones that cause progressive roll wear. This protective function also improves food safety by eliminating hazardous materials from finished grain products.
Wide Capacity Range Across 11 Scalable Models
Available in 11 models (TQSF43–TQSF250) with capacities from 1 to 22 t/h for common wheat. TQSFB models offer additional air-recycling options. Match exact throughput requirements—from small specialty mills to large industrial plants. Modular design allows easy expansion. All models maintain validated high separation efficiency across the full capacity range.
Adjustable Parameters, Versatile Application, and Durable Build
Adjust vibration amplitude and airflow volume externally to optimize for different grains, moisture, or contamination levels. Handles wheat, rice, corn, beans, sesame, coffee, and more. Heavy-duty carbon steel with anti-corrosion coating (stainless steel optional). This heavy impurity separator provides low total cost of ownership through durable bearings, sealed motors, and reliable continuous operation.
Technical Specifications
| Model | Sieve（cm） | Capacity（t/h） | Air Pressure（pa） | Air Volume（m3/h） | Power（kg） | Weight（kg） | Dimension（mm） |
| TQSF43 | 43 | 1-1.5 | ﹤980 | 3000 | 2×0.25 | 215 | 1270×700×1600 |
| TQSF50 | 50 | 2-4 | ﹤980 | 4000 | 2×0.25 | 230 | 1420×780×1800 |
| TQSF60 | 60 | 3-5 | ﹤980 | 4500 | 2×0.25 | 280 | 1450×876×1800 |
| TQSF80 | 80 | 5-7 | ﹤980 | 6000 | 2×0.25 | 340 | 1450×1046×1800 |
| TQSF100 | 100 | 7-9 | ﹤980 | 8000 | 2×0.25 | 400 | 1500×1246×1900 |
| TQSF125 | 125 | 9-11 | ﹤980 | 10200 | 2×0.25 | 500 | 1470×1496×1900 |
| TQSFB125 | 125 | 15-18 | ﹤980 | 12000 | 2×0.55 | 650 | 1649×1714×2083 |
| TQSF150 | 150 | 11-14 | ﹤980 | 12000 | 2×0.25 | 600 | 1580×1746×1900 |
| TQSFB150 | 150 | 18-20 | ﹤980 | 15000 | 2×0.55 | 760 | 1649×1964×2083 |
| TQSF175 | 175 | 14-18 | ﹤980 | 15000 | 2×0.25 | 750 | 1470×1990×1900 |
| TQSF200 | 200 | 16-20 | ﹤980 | 17000 | 2×0.25 | 1000 | 1470×2292×1900 |
| TQSF250 | 250 | 20-22 | ﹤980 | 20400 | 2×0.25 | 1050 | 1470×2835×1900 |
Note: Capacities based on common wheat with standard contamination levels. TQSFB models feature integrated air-recycling system.
FAQ
What is a de-stoner used for in grain processing?
A de-stoner removes stones, glass, metal, and other high-density contaminants from grain to protect downstream equipment and ensure final product purity.
How does the TQSF grain de-stoner work?
It combines vibration and airflow: material flows across a vibrating screen while upward air fluidizes the grain bed; heavier stones settle downward while lighter grain floats upward for separation.
What is the difference between TQSF and TQSFB models?
TQSFB models feature an integrated air-recycling system, allowing stand-alone operation without connection to facility aspiration. Standard TQSF models connect to centralized dust collection systems.
Can a de-stoner remove stones the same size as grain?
Yes. The TQSF de-stoner effectively removes small, lighter stones roughly the size of a grain kernel—a key advantage over simpler separation equipment.
What crops can be processed with this de-stoner?
The TQSF series handles wheat, rice, corn, beans, sesame, coffee, barley, oats, and other granular materials requiring stone removal.
How do I adjust the machine for different materials?
Vibration amplitude can be adjusted via eccentric weight positioning on the dual motors; airflow volume is also adjustable to match material characteristics.
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