Complete process lines for powder and bulk material

General installation engineering

For 90 years, the POITTEMILL Group has been developing, designing, and manufacturing equipment and turnkey systems for powder and bulk material processing. Our reputation as a value engineering partner is built on delivering solutions with added value, leveraging our in-depth materials expertise and visionary engineering. POITTEMILL takes pride in offering extensive experience and superior competence in powder processing technology and engineering


Design and revamping of production and storage units for powders


Design and development of process equipment


Piping, fluids, and isometrics studies

Engineering missions

  • Flow-sheet
  • Estimation, budget, batch breakdown
  • P&ID and UID diagrams
  • Lists and specifications of materials
  • Tender specifications, technical and economic comparisons
  • Piping, pressure equipment, and metal structures calculations
  • Planning, dashboards, and budget monitoring
  • Site plans
  • 3D layout plans
  • Structural plans
  • Civil engineering guide plans
  • Load calculations
  • Boilermaking plans
  • Piping plans
  • Isometrics
  • Operating instructions
  • Functional analysis
  • Technical documentation

We master the entirety of the processes

Optimization of raw materials for maximum efficiency

Pre-grinding plays a crucial role in the processing of raw materials. Its primary function is to prepare materials by reducing them to an initial, more manageable size. This initial dimensional reduction has a significant impact on the entire process, improving energy efficiency and optimizing the quality of particles to be further processed.

Once the materials are fed, our pre-grinding unit comes into action. Equipped with robust grinding devices tailored to the specific characteristics of the processed raw materials, the goal is to effectively reduce particle size while minimizing the generation of undesirable fines. This initial fragmentation stage greatly facilitates subsequent process steps by creating homogeneous particles tailored to the specific requirements of the final product.

Poittemill’s distinctive expertise is fully evident in the design of our pre-grinding units. We understand the importance of a customized approach to address the unique characteristics of each raw material. Our engineers implement advanced technologies to ensure precise and efficient fragmentation while minimizing energy consumption.

Furthermore, the design of our pre-grinding devices incorporates advanced control mechanisms that allow for adjusting particle size according to the precise specifications of the final product. This flexibility is essential to adapt to variations in raw materials and ensure consistency in the quality of the final product.

The Art of Transforming Materials into Superior Quality Particles

Fine and ultra-fine grinding represents a crucial stage in our process, where previously prepared materials reach the desired particle size. This delicate phase, at the core of our process engineering, aims to transform raw materials into fine and homogeneous particles that meet the precise specifications of the final product.

The process starts after pre-grinding, with materials now reduced to a manageable initial size. These particles enter our grinding units, equipped with advanced grinding technologies. These fine and ultra-fine grinding mechanisms are precisely designed to ensure optimal reduction of particle size without compromising quality.

The careful selection of grinding devices is a distinctive feature of our expertise at Poittemill. We tailor our technologies based on the specific properties of raw materials, ensuring optimal process performance. The grinding devices are calibrated with particular attention to minimize the generation of undesirable fines, thereby optimizing efficiency while enhancing the quality of the final product.

Poittemill’s expertise extends beyond size reduction; it is a commitment to the quality of the resulting particles. Our grinding units are designed to minimize wear, ensuring increased durability and reduced maintenance costs. Efficient management of the heat generated during grinding is also considered, contributing to maintaining the stability of the properties of the processed materials.

In every finely ground particle lies the signature of Poittemill’s process engineering. Our meticulous approach, combining cutting-edge technology and extensive experience, ensures that each stage of the grinding process significantly contributes to the overall quality of the final product.

Precision and Discernment at the Heart of the Process

The separation technique, a crucial step in our process, embodies the precision and discernment required to isolate different fractions of the processed materials. This phase plays a determining role in the final product’s quality by ensuring that only the desired particles progress through the subsequent stages.

The process begins after grinding, when the materials consist of different particle sizes. Separation units come into action to sort and classify particles based on their size, specific weight, or other physical characteristics.

Various separation techniques are implemented, such as vibrating screens, cyclones, or our high-classification separators, depending on the specific properties of the materials and the requirements of the final product. These devices act selectively, allowing each fraction to follow a determined path while eliminating undesirable particles.

The precision of this step is essential to ensure the homogeneous quality of the final product. Poittemill engineers optimize the configuration of separation devices based on the unique properties of the processed materials, minimizing losses and maximizing the overall process yield.

Cutting-edge technology is integrated into our separation units to ensure optimal performance. Advanced control systems dynamically adjust separation parameters based on variations in raw materials, ensuring adaptability to changing production conditions.

Air Purification and Quality Assurance

The crucial stage of aspiration and filtration in our transformation process is dedicated to air purification and ensuring the quality of the finished products. This phase ensures a safe working environment while eliminating undesirable particles that could compromise the quality of the final product.

Aspiration: The process begins with strategically positioned aspiration systems. These devices are designed to capture and suction fine particles and dust generated throughout the previous stages of the process. Aspiration is meticulously calibrated to maintain a clean working environment, promoting operational safety and the well-being of workers.

Filtration: The aspirated particles then pass through advanced filtration systems. These filters are specifically chosen for their ability to retain different sizes of particles, ensuring that only the desired fine and ultra-fine particles progress in the process. Filtration is a critical element for the quality of the final product, eliminating contaminants and ensuring strict purity standards.

We integrate high-efficiency filters, optimized for selective particle retention, while minimizing the loss of valuable material. Filtration systems are precisely sized based on air flow and particle characteristics, ensuring maximum performance.

In summary, aspiration and filtration at Poittemill are not just safety measures; it is a commitment to the quality of the final product. Each particle that progresses after this stage is the result of meticulous air purification, underscoring our dedication to quality, safety, and the overall excellence of our transformation process.

Strategic Storage for Continuous and Optimized Flow

Once the materials are processed, they are directed to specially designed storage silos. These silos function to temporarily receive raw materials awaiting further processing. The design of the silos is tailored to the specific properties of the materials, ensuring sufficient capacity while avoiding risks of contamination or deterioration.

Transport through the Silos: Silos are not just storage points; they are also integrated into a transport system that guides materials to different phases of the process. The strategic design of these silos facilitates a continuous and regulated flow, optimizing the transition of materials between different treatment stages.

At Poittemill, we consider not only the required storage capacity but also the ease of loading and unloading, minimizing downtime and maximizing operational efficiency.

Advanced Logistic Management: Advanced control systems can be integrated to monitor and regulate the flow of materials through the silos, ensuring optimal synchronization with other process stages. This meticulous approach ensures consistency and predictability, contributing to the constant quality of the final product.

Silos are not just storage containers; they are active elements in the logistical management of the transformation process, ensuring smooth transportation of raw materials and thereby contributing to the optimal performance and consistent quality of our overall process.

Customized Optimization for Your Grinding Process

To ensure that our grinding facilities optimally meet the specific requirements of various industries and products, precision in the control system is essential. We emphasize a precise control system with an intuitive user interface, allowing for efficient and personalized control of the load.

In our approach, all crucial measuring and adjustment devices are integrated as standard equipment, operating synergistically with the grinding module through a dedicated controller. This synchronization ensures optimal performance and maximum responsiveness when adjusting process parameters.

We acknowledge that each grinding facility may require specific adjustments to optimize its performance. That’s why we offer the flexibility to easily integrate other products from our manufacturing into superior automation solutions. Our team enthusiastically supports the necessary individual adaptations to ensure a seamless synergy between our equipment and the unique requirements of your grinding process.

For us, sensor technology and control systems are not just standard components but rather customizable elements that harmoniously adapt to your specific configuration. Our commitment to innovation and customization is reflected in our ability to adjust the software according to your needs, ensuring maximum efficiency and optimal management of your grinding process

Preventive Safety and Regulatory Compliance

Risk Assessment: Before implementing ATEX explosion protection, a thorough risk assessment is conducted. This includes identifying potentially explosive zones, characterizing present substances, and evaluating sources of ignition. This rigorous analysis provides the basis for designing and implementing appropriate protective measures.

Design and Isolation: Equipment and at-risk zones are equipped with protective devices such as isolation systems, bursting devices, and specific ATEX-certified equipment. These devices are designed to minimize the effects of a potential explosion, limiting flame propagation and generated pressure.

Real-Time Monitoring: Real-time monitoring systems are installed to detect any precursor signs of an explosive atmosphere. These devices include gas sensors, spark detection systems, and other specialized equipment. In case of detection, preventive measures, such as automatic process shutdown, can be activated to minimize risks.

Training and Awareness: Operator and staff training is an essential component of our ATEX explosion protection approach. Awareness of emergency procedures, safety equipment, and best practices contributes to creating a proactive safety culture within our company.

At Poittemill, the implementation of ATEX explosion protection goes beyond mere regulatory compliance. It is a commitment to the comprehensive safety of our employees, equipment, and work environment. Our proactive approach, combining thorough risk assessment with advanced technology, ensures that each step of our transformation process is carried out in accordance with the strictest safety standards, preserving operational integrity and team safety.

Complete process line

Crushing and Grinding Plant in Algeria

Technical Specifications

Product: Calcium Bentonite

Input Product Size: 0-150 mm

Output Product Size: 98% <74µm

Capacity: 23 tons/hour

Complete process line

Grinding and drying Plant in Peru

Technical specifications

Product : Limestone

Input Product Size : 0-20 mm

Output Product Size : 90%<20µm

Capacity : 6000 kg/h

Sustainable processing systems

In the context of the climate emergency, the environment is the strategic priority for the POITTEMILL Group. The Group approaches it with the ambition to offer processing technologies that maximize production efficiency while minimizing your carbon footprint. Furthermore, our dry powder processing technologies at the POITTEMILL Group are developed to support and integrate a more sustainable lifecycle


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At the forefront of innovation, the POITTEMILL Group has been designing its own equipment for over 90 years, offering customized turnkey solutions.