22/11/2025
Improvement of fans for cement industry
Cement manufacturing is one of the most fundamental industries in the world. Currently, cement and the concrete and reinforced concrete made from it are the main building materials in almost every factory, office or infrastructure project. Operating conditions such as abrasives, dust and high temperatures cause uneven wear on the blades of industrial fan. Dust can build up inside the impeller, add weight and lead to imbalance. Canada Blower engineering department investigated the trajectory and energy of solid particles, their sizes and their chemical composition, and also developed deflectors that change the structure of the flow, allowing to minimize negative consequences. But this industry also poses quite complex challenges for industrial equipment. Dust, abrasive wear, extreme temperatures, these are all essential attributes in the production of cement under harsh conditions and around the clock.
Large and special fans are often subject to the effects of wear. Abrasive environment, which saturates the pumped air settle on the material. The sucked particles fall on all structures of the fan - impeller blades, housing, inlet cone and bearings.
The damage caused leads to a decrease in the thickness of the material and thus a shortened fan life, as well as a decrease in performance or imbalance, which will prevent further operation. From an economic point of view, it is more profitable to invest in preventive protective measures.
Pic.1 - backward curved fan with heavier
structural material and re-enforcement Main causes of wear on the fan blades:
- due to dust load
- due to sticking
Measures to reduce wear on the fan blades due to dust load:
- Using the optimal backward curved steel flat blades
- Wear protection assembly (abrasive-resistant fan blades)
Actions to reduce sticking:
- Using backward curved steel flat blades with low bending
- Use of blowing devices for cleaning blades
- Reducing of rotation speed
- Lower relative speed of impact of dust particles with fan blades
- Increasing the hardness of the material
Pic.2 shows single thickness die formed curved rigid blades in a wheel with a spun shroud that is coupled with an aerodynamically spun inlet cone
Fan manufacturers use materials specially designed for abrasion resistance, and added plates and bushings in places of maximum wear.
The content of abrasive or aggressive materials requires mandatory determination of optimal wear protection and its placement is vibration. Fan engineers increase the rigidity of the rotor, while fan speed by 30% less than the first critical speed, which avoids resonance and minimizes vibration.
High quality cement depends on accurate gas flow and fan speed control. This applies to the preheater, cooling devices and gases generated during the cement production process.
Pic. 3 – custom heavy duty industrial fan
More end users prefer to use low and high voltage variable frequency drives that provide the following benefits:
- Precise control of the fan motor speed according to the characteristics of the production process
- Longer fan life
- Low fan noise
- High quality cement
- Saving maintenance costs
- Elimination of high inrush currents and reduction of mechanical stress during starting
- Eliminating too high or low pressure
- Reducing of energy consumption, environmental friendliness
- Flying start
- Speeds causing mechanical resonance are automatically skipped.
Correct ex*****on of the system is of great importance wear protection. First, this system must match exactly various parameters of the technological process. For example, not every wear protection system can be used at higher temperatures. Secondly, the choice of performance has a significant impact on costs.
Direct combinations of different wear protection systems reduce costs without sacrificing durability - a solution with an excellent price-performance ratio.
The geometry of the wear protection and the technology of applying the protective layer on the fan blades depend on the correct surface character of the individual protective materials. In order to minimize the washout of cracks in the protective layer, which are inevitable due to the high hardness of some protective materials, with fine dust, the location of the deposited beads opposite to the flow direction or zigzags is chosen.
Pic. 4 - carbide liners on fan blades
Companies in the global cement industry face significant challenges. To increase productivity and at the same time reduce costs, they must produce high-tech products, and the production process itself must be energy efficient, as flexible and reliable as possible. These products must also comply with environmental requirements and be as safe as possible for employees, equipment and structures.
One of the most important parts of manufacturer’s support for cement engineers and mechanics is the ability to improve the productivity and energy efficiency of an existing plant without cost, downtime, or disruption. The manufacturer can design and install a new rotor assembly for any existing fan housing, keeping the foundations, drive, static parts, inlets and outlets, and control equipment intact. This can significantly improve productivity and reduce energy costs. Reduce capital costs by replacing the rotor, and not the entire fan. This is a service that some manufacturers can provide for any type of centrifugal fan. Businesses can move from problem-solving to preventative maintenance, improving the cost-effectiveness of the manufacturing process.
Taking into account the specific properties of abrasive materials, it is possible to calculate, for example, the load on the leading edges of the blades, which can be determined mechanically only by high costs or even impossible ventilating.com fanblower.com highpressureblower.net industrialblowerfan.com industrialfanblower.net industrialfanblower.com pressureblower.net northernindustrialsupplycompany.com industrialpressureblower.com tenderall.com chicagoblowercanada.com cbblower.com buffaloblower.com buffalofan.com nis-co.com canadianblower.com olegsystems.com canadablower.com abbblower.com acmefan.net industrialblower.net fansandblowers.net americanblower.net barryfan.com cincinnatifan.net canadafans.com barryfan.net. To ensure long equipment life and minimum downtime, it is important to have a proper wear reduction maintenance plan that covers all equipment. An aerodynamic impeller and the case allow to create durable fans with high efficiency for cement industry.
