Business Scope

• Seed processing plant: 1~15 t/h
• Flour mill plant: 30~1000 t/d
• Customized Steel plate silo project: 50~10000 ton
• Manufacturer since 1976

Product Description

• Function: To remove stones from continuous granular grain flow by density.
• Application: Free-flowing grains and seeds.
• Capacity: 1~22 t/h (based on wheat).

The TQSF gravity grader & destoner is widely used to remove stones by density. Heavy impurities such as glass and metal can be removed efficiently due to the difference in density. Light impurities like grass seeds, slag, soil, and dust can be effectively extracted via air cleaning systems.

Working Principle

The material falls into the drip baffler in the feed box through the feed inlet, and the material is evenly covered throughout the width of the screen due to machine vibration. The upper sieve surface is automatically stratified according to the specific gravity and particle size of the material under the combined action of vibration and air flow. The light mass becomes the material on the upper sieve surface which is discharged out of the machine by the tail. Lighter hull, dust and other light impurities are drawn away by the suction vent.

Larger density of the material and the sandstone, clay pieces fall on the lower sieve surface. Because of the vibration and different density, the heavy material flows towards the tail of the sieve; Sand and stone and mud are discharged to the head of the sieve. Gravel and granule will be directly discharged out of the machine.

Specifications

Features

• Modular design, robust & compact structure, equipped with necessary control systems.
• Effectively separates stones and heavy impurities from grain. Destoning & grading processes integrated in one machine.
• Dual separating decks enable high capacity and superior cleaning results.
• Adjustable screen deck slopes integrated with variable air speed control for precise processing requirements.
• Screen deck designed with adjustable shaking strokes and angles for flexible process setups.
• Unique backflow-prevention design (Patent: ZL 201020577278.2) prevents grain leakage from the stone discharge port.
• Distinctive air blowback mechanism (Patent: ZL 201120180371.4) paired with a user-friendly air control board.
• Driven by a powerful dual-motor vibrators system.

The screens can be easily replaced to accommodate different materials.

Detailed Component Views

Adjustable Wind Door

This component is primarily used to adjust the air volume according to the impurity content and requirements of different grains.

Magnehelic Pressure Gauge

Proper air regulation is critical on a gravity destoner. This pressure gauge accurately displays both internal pressure and total air volume.

Vibratory Motor

Provides the necessary structural vibration to generate fluidizing friction, lifting grains and separating high-density elements like stones and sand.

Spring Assembly

Supports vibration control. The rotary cleaning mechanism can also support sorting/grading based on project demands.

Angle Indicator

Displays active screen angle adjustments, allowing fine-tuning to maximize separation efficiency for different materials.

Related Product

Company Profile

Our company was founded in 1976 and our main business includes grain cleaning equipment, wheat, corn, and soybean milling equipment, and seed cleaning and selection equipment. Our company currently has nearly a thousand experienced employees, a production workshop of 120,000 square meters, and multiple advanced raw material machining systems such as laser cutting machines, CNC cutting and bending machines, and fully automatic machining centers. In addition, the company has self-operated import and export rights and has passed international authoritative organization certifications such as ISO9001, SGS, and EU CE certifications. We have served various types of customers in over 40 countries and regions around the world, and have received high praise from our users!

• 48 years of manufacturing experience since 1976.
• Top 10 Grain Processing Machinery Manufacturing Company in China.
• Member of 13 China national standards drafters in grain processing industry.
• 110 patented technologies and products.
• 330,000 square meters big scale production area.
• Over 100 experienced engineers, research staff and technicians.
• State-of-the-art facilities with advanced imported CNC machines for functional parts.
• Full range of services, from single machines to turnkey systems in grain and flour industries.
• Machinery and equipment quality tested by domestic and global markets with extensive installation and troubleshooting experience.

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