Bulk Material Handling:
Industry Sectors and Applications

The processing of dry bulk solids relies heavily on effective bulk material handling systems. Our deep experience in bulk handling system design enables us to develop smart and sustainable solutions that respond to our customers' specific processes and performance goals.

Our cutting-edge systems are utilized across a wide range of industries—including cement, food and beverage, chemicals, mining, plastics, and agriculture—for applications such as conveying, storing, dosing, mixing, and dust collection. Whether it's a complex integrated system or a single piece of equipment, we have the expertise to engineer solutions that optimize material flow, enhance operational safety, and improve overall productivity.

The agriculture industry greatly benefits from the use of bulk material handling systems in the processing, transportation, and storage of agricultural bulk materials such as soybeans, corn, wheat, rice, and a wide range of other related products. To efficiently move these dry bulk solids within processing lines, various conveying systems (including pneumatic conveyors, screw conveyors, and belt conveyors) are commonly used. In agricultural processing, silos are the primary component of bulk solids storage systems, used extensively to store dry grains and related materials.

A diverse array of agricultural bulk materials can be handled using modern bulk solids handling equipment and systems. These products include wheat, flour, semolina, barley, oats, rye, bran, chaff, animal feed, seeds, corn, chickpeas, beans, lentils, peas, soybeans, sesame, rice, rice flour, dried fruits, hazelnuts, peanuts, almonds, sunflower seeds, cottonseeds, grain cereals, and chestnuts.

Whether for conveying, storing, batching, or mixing, bulk material handling solutions are essential for improving efficiency, minimizing product loss, and maintaining the quality and safety of agricultural goods throughout the production process.

Food processing and manufacturing for both human and animal consumption is a major global industry that continues to grow rapidly. Bulk material handling systems play a crucial role in various stages of food production, including processes such as corn milling, sugar refining, coffee processing, flour production, and starch handling. These systems ensure efficient, hygienic, and automated movement of materials throughout the production line.

Polimak’s food-grade bulk material handling systems are specifically designed for such applications. Constructed from high-quality stainless steel and engineered without contamination-prone surfaces, these systems meet strict hygiene standards and are ideal for handling sensitive food products.

A wide range of food-grade bulk materials including coffee beans, ground coffee, sugar, salt, flour, milk powder, corn, starch, spices, and other dry ingredients can be conveyed, stored, loaded, and fed using bulk solids handling systems. In food production environments, it is essential to use equipment that meet food safety regulations, such as food-grade conveyors, silos, feeders, and dust collection systems. These systems help maintain product integrity, ensure sanitary processing conditions, and increase operational efficiency.

Raw materials such as limestone, quartz, and other minerals extracted from the Earth’s crust must undergo processing before they can be used in consumer or industrial applications. In the mining industry, including sectors such as cement production, calcium carbonate (commonly known as calcite, with the chemical formula CaCO₃), and lime manufacturing, grinding plays a key role in preparing these raw materials for further use.

Grinders are employed to reduce the size of feed materials, which helps liberate valuable minerals from the surrounding waste rock, also known as gangue. Among the various grinding technologies available, ball mills are the most widely used machines in modern mining operations thanks to their efficiency and versatility. These mills rely on precise and consistent feeding to ensure optimal performance.

Feeding systems such as screw feeders are commonly used to introduce raw materials, for example ores, into the ball mill at controlled and continuous rates. As the grinding process proceeds, the material is progressively reduced in size. Once the desired fineness is achieved, the ground material is discharged through the outlet of the mill.

Steady and controlled discharge is critical for maintaining process efficiency and avoiding blockages or fluctuations in downstream operations. Bulk material discharge systems such as rotary valves, slide gates, or vibrating feeders can be installed at the outlet point to ensure smooth and controlled material flow. These systems help ensure smooth, accurate, and dust-controlled discharge of the processed material, supporting consistent workflow and improving overall plant performance.

Electricity generation from fossil fuels such as coal, oil, or natural gas typically relies on internal combustion engines, combustion turbines, or conventional steam turbine technologies. These systems produce energy through the combustion of fuel, which in turn drives generators to produce electricity.

In coal-fired power plants, fly ash is one of the main by-products of the combustion process. It is a fine particulate material that is captured by pollution control devices such as baghouse filters or electrostatic precipitators (ESPs). Once collected, fly ash is transported to bulk material storage systems, generally silos, where it is safely contained and prepared for further handling.

Controlling the flow of fly ash from storage to subsequent processing or transport is achieved by bulk material discharging systems such as rotary valves, slide gates, and screw dischargers. The discharged ash can then be loaded into bulk transport vehicles, or it can be conveyed directly to downstream processing facilities using mechanical or pneumatic conveying systems.

Fly ash is commonly used in various industrial applications, most notably in cement and concrete manufacturing, where it serves as a supplementary material. By integrating reliable bulk handling solutions, power plants can manage fly ash efficiently, reduce environmental impact, and support sustainable material reuse in construction and manufacturing sectors.

In the plastics industry, bulk material handling systems are widely used for the storage, discharging, loading, and feeding of plastic materials. Examples of plastics commonly handled in bulk form include polyvinyl chloride (PVC), polyethylene, polypropylene (PP), acrylonitrile butadiene styrene (ABS), as well as many other thermoplastic and thermosetting polymers. These materials are typically processed in powdered or granular form.

These bulk solids in powdered or granular form are generally transferred between equipment such as silos, mixers, blenders, and batching units through a variety of mechanical and pneumatic conveying systems. Once processed or measured, the materials are fed into injection molding or extrusion machines using specialized feeding systems designed to ensure precise, consistent flow and to minimize material loss or contamination.

Efficient handling of bulk plastics is essential to maintain product quality, optimize production speed, and ensure safe, dust-free operation. Different equipment, including screw conveyors, rotary valves, and vacuum conveyors, may be used based on material characteristics and operational needs.

By integrating advanced bulk material handling solutions, plastic manufacturing facilities can achieve greater automation, reduce manual labor, and ensure the smooth, continuous flow of raw materials throughout the production process.

Bulk solids handling systems are essential for conveying, processing, and managing dry materials in the chemical industry. These systems are critical in maintaining efficiency and safety across various chemical production and transport operations.

Dry bulk solids such as aluminum oxide, titanium dioxide (TiO₂), urea, paint additives, and many other powdered or granular chemicals are handled in large volumes. These materials are transferred by pneumatic conveying systems during processes (such as ship and barge unloading), where equipment like roots blowers is used to transfer bulk solids from vessels to silos, storage units, or production lines.

Polimak designs and manufactures bulk material handling systems tailored to the specific requirements of the chemical sector, ensuring seamless integration with existing operations. These systems are used for conveying, metering, feeding, and discharging bulk materials with a focus on precision, contamination control, and operational reliability. Our solutions include pneumatic conveying systems, rotary valves, screw conveyors, dust collectors, and dosing equipment, all engineered to handle the demanding conditions and safety standards of chemical processing environments.