Engineered for premium cleaning efficiency and compliant with the stringent mechanical demands of United Kingdom grain mills and agricultural processing plants.
In the United Kingdom, agricultural standards are among the most stringent in the world, governed by strict oversight from the Food Standards Agency (FSA). The UK arable crop market focuses heavily on high-yield, high-purity grain production, covering vast farming landscapes across East Anglia, Yorkshire, and the Scottish Lowlands. Wheat, barley, and oats form the cornerstone of UK agriculture, serving both human consumption sectors (baking, breakfast cereals) and the internationally renowned brewing and distilling industries.
Harvesting grains with modern high-capacity combine harvesters inevitably introduces foreign materials, especially stones, soil clods, and heavy impurities. Without highly efficient gravity-based separation systems, these contaminants pose catastrophic risks. Even small mineral fragments can destroy downstream rollers, hammermills, and extrusion machinery, causing expensive downtime and introducing physical hazards into food products. Our high-precision destoners are designed specifically to meet the high quality, throughput, and safety expectations of UK processors.
The fundamental physics of our gravity destoners rest on the difference in specific gravity and aerodynamic behavior between the organic grain kernel and inorganic materials (stones, glass, metal). Dry grains, when fluidised over an inclined sieve bed under controlled suction, form a stratified layer.
The lighter grains float on a cushion of rising air and slide down the inclination toward the discharge gate. Concurrently, the heavier stones sink to the woven screen surface and are driven upward by the reciprocating linear vibration of the sieve deck, eventually discharging through a dedicated stone-gate.
By integrating variable frequency drives (VFD) and adjustable screen decks, our machines can be precisely calibrated to handle diverse agricultural commodities: from small-seeded grains like rape and mustard seed to larger pulses, wheat, and premium green coffee beans.
| Grain Variant | Density Range (kg/m³) | Optimal Air Velocity (m/s) |
|---|---|---|
| Milling Wheat | 750 - 820 | 3.2 - 4.0 |
| Malting Barley | 600 - 680 | 2.8 - 3.5 |
| Artisan Coffee Beans | 550 - 700 | 2.5 - 3.2 |
| Heavy Pulses / Beans | 800 - 900 | 4.2 - 5.0 |
We build our machines with the regulatory security you need to seamlessly integrate our systems into commercial facilities in England, Scotland, Wales, and Northern Ireland.
Flour mills and seed processing areas are classified as explosive dust zones. Our machines feature optional ATEX-certified explosive-proof motors, antistatic belts, and sealed bearings to eliminate ignition risks in accordance with UK health and safety regulations (DSEAR).
Every component, from the structural chassis to the specialized screen meshes, is produced in facilities certified under ISO 9001:2015 quality management, guaranteeing durability and consistent performance across production runs.
We provide full CE declarations and UKCA certifications for all machinery exports, making it simple to complete import clearance and health and safety inspections for commercial operation in Great Britain.
Discover how we adapt our grain destoners to match the technical needs of specific agricultural and industrial sectors across the UK.
Today's consumers and regulatory bodies demand clean-label products free from physical hazards. For grain suppliers, this requires implementing reliable mechanical separation systems early in the processing line. Traditional wet-cleaning methods, while effective at washing away soil, create wastewater treatment challenges and promote mold or bacterial growth.
Our dry gravity separation technology solves this problem. It uses adjustable air suction to fluidize the grain bed, separating contaminants without requiring water. This keeps the grain dry, ready for milling or storage, and protects the organic status of the crop by avoiding heat or chemical washes.
Excellence in Engineering & Manufacturing for Global Agricultural Operations.
Henan Jiujie Machine Co., Ltd. is a professional supplier of complete equipment and engineering services for the food production and grain processing industries. Our business covers a wide range of applications, including wheat flour milling plants, feed processing factories, and rice processing plants. Our product portfolio includes conveying equipment, cleaning equipment, flour milling equipment, and other related machinery. Over the years, our products have been widely recognized by customers both in domestic and international markets.
Since its establishment, Henan Jiujie Machine Co., Ltd. has been dedicated to the research and development of grain processing technology and machinery. With extensive industry experience, we are able to provide integrated solutions across the entire grain and food processing industrial chain. Our solutions cover multiple stages, including raw material collection, storage, cleaning, grading, sieving, grinding, mixing, shaping, production, and packaging.
We use modern manufacturing technology and equipment to ensure every destoner meets our high standards for reliability.
Henan Jiujie Machine Co., Ltd. places strong emphasis on technological innovation and continuous improvement of manufacturing capability and product quality. We have introduced a series of advanced processing equipment, including CNC laser cutting machines, CNC bending machines, and CNC lathes. In addition, we are equipped with CNC machining centers, CNC boring machines, surface grinding machines, planers, and other high-precision manufacturing equipment. We have also established an electrostatic spraying production line to further enhance product surface quality and durability.
Our manufacturing processes include steel plate laser cutting, CNC bending, CO₂ arc welding, argon arc welding, robotic welding, and electrostatic surface treatment. These advanced production technologies ensure consistent product quality and continuous innovation.
We deliver complete production solutions designed to support your operations from design through to long-term maintenance.
As a professional industrial solution provider, Henan Jiujie Machine Co., Ltd. delivers not only equipment but also comprehensive production solutions that enhance the overall value chain for our customers. By utilizing AutoCAD-based engineering design systems and advanced machining centers, we are able to provide high-precision, durable products at competitive prices. We are committed to offering complete pre-sales consultation, technical support, and reliable after-sales service.
Customer satisfaction is always our top priority. We sincerely welcome partners and friends from all over the world to contact us and cooperate for mutual success.
Select from our complete range of grain milling, cleaning, grinding, and destoning machinery configurations.
Detailed technical information addressing common queries about installing and operating our equipment in the UK.
Jiujie Machine
