{"id":6988,"date":"2024-07-17T05:58:45","date_gmt":"2024-07-17T02:58:45","guid":{"rendered":"https:\/\/kopar.fi\/?p=6988"},"modified":"2026-05-27T10:01:00","modified_gmt":"2026-05-27T07:01:00","slug":"what-is-a-screw-conveyor-and-how-it-works","status":"publish","type":"article","link":"https:\/\/kopar.fi\/en\/mika-on-ruuvikuljetin-ja-miten-se-toimii\/","title":{"rendered":"What is a screw conveyor and how does it work?"},"content":{"rendered":"

What is a screw conveyor?<\/h2>\n\n\n\n

A screw conveyor is a mechanical device that transports materials using a rotating screw inside a tube or trough. Its operating principle is based on Archimedes' screw: as the screw rotates, its threads push the material forward in the direction of the shaft. This simple yet effective mechanism is suitable for a wide range of industrial applications \u2013 from mining to the chemical industry, and from waste management to biogas plants. In this article, we will cover the operating principle of the screw conveyor, the most common types, selection criteria, structural features, as well as maintenance and design principles.<\/p>\n\n\n\n

Screw conveyors are particularly valued for their versatility: the same basic structure can be adapted to handle a wide variety of materials and process conditions. A correctly sized and designed system is an energy-efficient, reliable, and long-lasting investment.<\/p>\n\n\n\n

Screw conveyor working principle<\/h2>\n\n\n\n

The screw conveyor is based on the Archimedes screw, one of the oldest known mechanical devices. As the screw rotates, it moves material forward inside a pipe or chute. This movement is caused by friction between the threads of the screw and the walls of the pipe.<\/p>\n\n\n\n

The speed and capacity of a screw conveyor depend on several factors, such as the diameter of the screw, the pitch of the threads and the rotation speed. These parameters can be adjusted as needed to achieve the desired transfer power and speed.<\/p>\n\n\n\n

Screw conveyor types and their suitability for different applications<\/h2>\n\n\n\n

Screw conveyors are not a one-size-fits-all solution \u2013 different applications require different structural solutions. The type of screw conveyor is primarily chosen based on the properties of the material to be conveyed, the installation environment, and process requirements. The following describes the most common types and their typical applications.<\/p>\n\n\n\n

Grain conveyor<\/h3>\n\n\n\n

A trough screw conveyor is a screw conveyor based on an open trough structure, where the screw rotates inside a U-shaped trough. It is best suited for dry, free-flowing materials such as grain, sand, ash, or granular chemicals. The open structure facilitates cleaning and allows material to be added or removed from multiple points along the conveying path. A limitation of the trough screw conveyor is its unsuitability for dusty, moist, or hazardous materials that require a closed system for handling.<\/p>\n\n\n\n

Pipe conveyor<\/h3>\n\n\n\n

The tubular conveyor is a screw conveyor based on a closed tubular structure, where material is transported completely isolated from external conditions. This type of screw conveyor is particularly well-suited for dusty, damp, hazardous, or easily perishable materials. The closed structure prevents the material from spreading into the environment and simultaneously protects it from external moisture and contaminants. The tubular conveyor is a common choice in the chemical industry and in processes with strict environmental requirements.<\/p>\n\n\n\n

Horizontal screw conveyor<\/h3>\n\n\n\n

A horizontal screw conveyor is a basic solution for flat material transfer between two points. It is simple in construction, easy to size, and suitable for a wide range of materials and industries. Due to its horizontal installation, the conveyor's capacity is typically at its maximum, and energy consumption remains controlled. It is often the starting point against which other conveyor solutions are compared.<\/p>\n\n\n\n

Inclined and vertical screw conveyor<\/h3>\n\n\n\n

An inclined screw conveyor allows material to be moved between different heights without a separate lifting device, making it an efficient solution for space-saving or processes involving height differences. As the installation angle increases, the conveyor's capacity typically decreases, and the risk of material flowing backwards must be considered in the design. A vertical screw conveyor takes up the least floor space and is particularly suitable for silo filling and multi-level plant structures. The flow characteristics of the material play a particularly key role in the dimensioning of these conveyor types.<\/p>\n\n\n\n

Flexible screw conveyor<\/h3>\n\n\n\n

A flexible screw conveyor consists of a flexible tube and a flexible screw rotating within it, allowing material to be transported through winding or tight routes. It is particularly suitable for situations where a fixed structure is not possible or where the transport route changes during the process. The limitation of a flexible screw conveyor is typically its lower capacity and shorter maximum conveying distance compared to fixed-structure alternatives.<\/p>\n\n\n\n \n

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Hello! I see you're looking into screw conveyors. Many in industrial process management face similar challenges with material handling \u2013 particularly in demanding conditions where wear and downtime eat into productivity. What best describes your situation right now?<\/div>\n <\/div>\n
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\n I am evaluating a new conveyor solution for our process<\/button>\n The current conveyor is causing problems \u2013 I'm looking for a better alternative<\/button>\n I explore options and compare solutions<\/button>\n <\/div>\n <\/div>\n
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Right \u2013 it sounds like your need is a tangible one. Kopar designs and manufactures bespoke material handling solutions, even for the most demanding process conditions, such as high temperatures and abrasive materials. In which industry or process is the conveyor needed?<\/div>\n <\/div>\n
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\n Metallurgy or furnace environment<\/button>\n Energy, waste heat or boiler plant<\/button>\n Mining, chemistry or other industry<\/button>\n <\/div>\n <\/div>\n
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A good starting point \u2013 the right conveyor solution is always found based on process requirements. Kopar's experts have been helping industrial customers design and tailor conveyor systems for decades. What is the most important factor you want to clarify?<\/div>\n <\/div>\n
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\n How to choose the right conveyor type for our process?<\/button>\n How to extend the service life of conveyor equipment<\/button>\n How to reduce maintenance and downtime costs?<\/button>\n <\/div>\n <\/div>\n
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Thank you \u2013 this helps us to better understand your situation. The Kopari team can assess your process requirements and tell you what kind of solution would be best suited for your specific use. Please leave your contact details and our expert will get in touch with you.<\/div>\n <\/div>\n
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