Economy & Market
Cooler Market Heats Up!
Published
4 years agoon
By
admin
Cement being a continuous industry, the pyro section that runs 24/7 is the process part which is a non-stop operation. Though the cooler appears to be fairly simple but the operational part is more difficult when the capacity of a plant goes up.
It is a common practice in the industry to enhance the capacity of the kiln after a certain period of time when the plant stabilises. The problem arises when the engineers try to augment the capacity of a cooler with that of enhanced capacity of a kiln. The job becomes even more difficult when the space is limited. However with the support from cooler suppliers and after the selection of a right consultant, the job can be done. Retrofitting of cooler is quite often undertaken at a number of plants. (Refer to the article by ERCOM Engineers in this feature) Few leading manufacturers of coolers are FLSmidth, IKN (Ingenieurbnro Knhlerbau Neustadt), CemProTec, Claudius Peters, KHD Humboldt Wedag, ThyssenKrupp Polysius AG and FONS Technology. Major differences lie in the manner in which material is conveyed over the grates, the mode of aeration and the solid-gas heat exchange, the type and presence of self-regulating valves for airflow and the hydraulic system for moving parts.
Jayant Saha, a consultant having a vast experience with coolers, says, "The clinker cooler becomes a major bottleneck to support capacity upgradation. Almost all capacity upgradation projects involve increment in the capacity of existing coolers. Even with some extent of compromise with clinker temperature increase at cooler outlet, extra grate area requirement comes out to approximately 50-60 per cent for upgradation in existing calciner kiln system. For upgradation of older SP plants, the cooler grate area increment goes to even 150 per cent. Grate area can be increased only if free area is available within the cooler itself or by extending cooler longitudinally or by both methods. In most of the cases, the existing layout limits the cooler expansion and thus limits the upgradation scope. It is always advisable to keep a provision in the layout for cooler expansion, by keeping a little longer horizontal length for clinker pan conveyor."
Saha further says that though there are many types of coolers for cooling the clinker, the state-of-the-art coolers are either grate coolers or cross bar coolers. As cooling is a heat-transmission process, cooling efficiency is greatly dependent on the temperature difference between the two media, i.e., air and clinker.
In the course of rapid development in coolers in recent years, new generations of grate coolers have come into the market. In fact, it is little difficult to keep a track of the current cooler generation. However, little improvements have been made with regards to cooler efficiency and the cooling principle. At the same time, the grate load has typically been increased from approximately 40 to 50 t/d clinker per m2, considering the same clinker temperature, though the widely accepted value is about 45.
However good choice you make to erect a good cooler, the way in which it is operated is equally important. Here a process engineer plays a very important role. Snow man, Red River and jamming are some of the problems faced in cooler operation. These are process-related issues for which a good process engineering knowledge is necessary. The raw meal design has its impact on cooler operation.
Cooler optimisation can be carried out by maintaining:
-Maximum possible clinker residence time in the cooler to achieve the best possible distribution of clinker and cooling air. The clinker retention time in the cooler is determined by the grate surface loading and clinker bed depth;
-Proper cooling air flow distribution;
-Proper tuned PID controller (grate speed vis-a-vis under grate pressure) plays an important role.
Suchismita of ERCOM says that the efficiency of the cooler depends on its ability to recover the heat from the clinker entering the cooler, and cooling the clinker. The cooler also fulfills the key role of transporting the clinker away from the kiln in a reliable manner.
Saha writes, the cooler also provides hot air to be used in waste heat recovery system (WHRS). The steam turbine-based waste heat recovery boilers (WHRB) are placed between the cooler and the de-dusting system. Depending on situations/requirements, various configurations are considered. If no modification is made to the cooler and the excess gas is ducted from the cooler exit to the WHRB, then the vent fan should have enough margins to take care of the pressure drop in the heat recovery boiler.
The upgradation of cooler is a purely an engineering job requiring correct inputs about the existing status and the expected results.
You may like
Concrete
Our strategy is to establish reliable local partnerships
Published
6 hours agoon
February 19, 2026By
admin
Jean-Jacques Bois, President, Nanolike, discusses how real-time data is reshaping cement delivery planning and fleet performance.
As cement producers look to extract efficiency gains beyond the plant gate, real-time visibility and data-driven logistics are becoming critical levers of competitiveness. In this interview with Jean-Jacques Bois, President, Nanolike, we discover how the company is helping cement brands optimise delivery planning by digitally connecting RMC silos, improving fleet utilisation and reducing overall logistics costs.
How does SiloConnect enable cement plants to optimise delivery planning and logistics in real time?
In simple terms, SiloConnect is a solution developed to help cement suppliers optimise their logistics by connecting RMC silos in real time, ensuring that the right cement is delivered at the right time and to the right location. The core objective is to provide real-time visibility of silo levels at RMC plants, allowing cement producers to better plan deliveries.
SiloConnect connects all the silos of RMC plants in real time and transmits this data remotely to the logistics teams of cement suppliers. With this information, they can decide when to dispatch trucks, how to prioritise customers, and how to optimise fleet utilisation. The biggest savings we see today are in logistics efficiency. Our customers are able to sell and ship more cement using the same fleet. This is achieved by increasing truck rotation, optimising delivery routes, and ultimately delivering the same volumes at a lower overall logistics cost.
Additionally, SiloConnect is designed as an open platform. It offers multiple connectors that allow data to be transmitted directly to third-party ERP systems. For example, it can integrate seamlessly with SAP or other major ERP platforms, enabling automatic order creation whenever replenishment is required.
How does your non-exclusive sensor design perform in the dusty, high-temperature, and harsh operating conditions typical of cement plants?
Harsh operating conditions such as high temperatures, heavy dust, extreme cold in some regions, and even heavy rainfall are all factored into the product design. These environmental challenges are considered from the very beginning of the development process.
Today, we have thousands of sensors operating reliably across a wide range of geographies, from northern Canada to Latin America, as well as in regions with heavy rainfall and extremely high temperatures, such as southern Europe. This extensive field experience demonstrates that, by design, the SiloConnect solution is highly robust and well-suited for demanding cement plant environments.
Have you initiated any pilot projects in India, and what outcomes do you expect from them?
We are at the very early stages of introducing SiloConnect in India. Recently, we installed our
first sensor at an RMC plant in collaboration with FDC Concrete, marking our initial entry into the Indian market.
In parallel, we are in discussions with a leading cement producer in India to potentially launch a pilot project within the next three months. The goal of these pilots is to demonstrate real-time visibility, logistics optimisation and measurable efficiency gains, paving the way for broader adoption across the industry.
What are your long-term plans and strategic approach for working with Indian cement manufacturers?
For India, our strategy is to establish strong and reliable local partnerships, which will allow us to scale the technology effectively. We believe that on-site service, local presence, and customer support are critical to delivering long-term value to cement producers.
Ideally, our plan is to establish an Indian entity within the next 24 months. This will enable us to serve customers more closely, provide faster support and contribute meaningfully to the digital transformation of logistics and supply chain management in the Indian cement industry.
A deep dive into Core Gear Series of products M, C, F and K, by Power Build, and how they represent precision in motion.
At the heart of every high-performance industrial system lies the need for robust, reliable, and efficient power transmission. Power Build answers this need with its flagship geared motor series: M, C, F and K. Each series is meticulously engineered to serve specific operational demands while maintaining the universal promise of durability, efficiency, and performance.
Series M – Helical Inline Geared Motors
Compact and powerful, the Series M delivers exceptional drive solutions for a broad range of applications. With power handling up to 160kW and torque capacity reaching 20,000 Nm, it is the trusted solution for industries requiring quiet operation, high efficiency, and space-saving design. Series M is available with multiple mounting and motor options, making it a versatile choice for manufacturers and OEMs globally.
Series C – Right Angled Heli-Worm Geared Motors
Combining the benefits of helical and worm gearing, the Series C is designed for right-angled power transmission. With gear ratios of up to 16,000:1 and torque capacities of up to 10,000 Nm, this series is optimal for applications demanding precision in compact spaces. Industries looking for a smooth, low-noise operation with maximum torque efficiency rely on Series C for dependable performance.
Series F – Parallel Shaft Mounted Geared Motors
Built for endurance in the most demanding environments, Series F is widely adopted in steel plants, hoists, cranes and heavy-duty conveyors. Offering torque up to 10,000 Nm and high gear ratios up to 20,000:1, this product features an integral torque arm and diverse output configurations to meet industry-specific challenges head-on.
Series K – Right Angle Helical Bevel Geared Motors
For industries seeking high efficiency and torque-heavy performance, Series K is the answer. This right-angled geared motor series delivers torque up to 50,000 Nm, making it a preferred choice in core infrastructure sectors such as cement, power, mining and material handling. Its flexibility in mounting and broad motor options offer engineers the freedom in design and reliability in execution.
Together, these four series reflect Power Build’s commitment to excellence in mechanical power transmission. From compact inline designs to robust right-angle drives, each geared motor is a result of decades of engineering innovation, customer-focused design and field-tested reliability. Whether the requirement is speed control, torque multiplication or space efficiency, Radicon’s Series M, C, F and K stand as trusted powerhouses for global industries.
http://www.powerbuild.in
Call: +919727719344
Pankaj Kejriwal, Whole Time Director and COO, Star Cement, on driving efficiency today and designing sustainability for tomorrow.
In an era where the cement industry is under growing pressure to decarbonise while scaling capacity, Star Cement is charting a pragmatic yet forward-looking path. In this conversation, Pankaj Kejriwal, Whole Time Director and COO, Star Cement, shares how the company is leveraging waste heat recovery, alternative fuels, low-carbon products and clean energy innovations to balance operational efficiency with long-term sustainability.
How has your Lumshnong plant implemented the 24.8 MW Waste Heat Recovery System (WHRS), and what impact has it had on thermal substitution and energy costs?
Earlier, the cost of coal in the Northeast was quite reasonable, but over the past few years, global price increases have also impacted the region. We implemented the WHRS project about five years ago, and it has resulted in significant savings by reducing our overall power costs.
That is why we first installed WHRS in our older kilns, and now it has also been incorporated into our new projects. Going forward, WHRS will be essential for any cement plant. We are also working on utilising the waste gases exiting the WHRS, which are still at around 100 degrees Celsius. To harness this residual heat, we are exploring systems based on the Organic Rankine Cycle, which will allow us to extract additional power from the same process.
With the launch of Star Smart Building Solutions and AAC blocks, how are you positioning yourself in the low-carbon construction materials segment?
We are actively working on low-carbon cement products and are currently evaluating LC3 cement. The introduction of autoclaved aerated concrete (AAC) blocks provided us with an effective entry into the consumer-facing segment of the industry. Since we already share a strong dealer network across products, this segment fits well into our overall strategy.
This move is clearly supporting our transition towards products with lower carbon intensity and aligns with our broader sustainability roadmap.
With a diverse product portfolio, what are the key USPs that enable you to support India’s ongoing infrastructure projects across sectors?
Cement requirements vary depending on application. There is OPC, PPC and PSC cement, and each serves different infrastructure needs. We manufacture blended cements as well, which allows us to supply products according to specific project requirements.
For instance, hydroelectric projects, including those with NHPC, have their own technical norms, which we are able to meet. From individual home builders to road infrastructure, dam projects, and regions with heavy monsoon exposure, where weather-shield cement is required, we are equipped to serve all segments. Our ability to tailor cement solutions across diverse climatic and infrastructure conditions is a key strength.
How are you managing biomass usage, circularity, and waste reduction across
your operations?
The Northeast has been fortunate in terms of biomass availability, particularly bamboo. Earlier, much of this bamboo was supplied to paper plants, but many of those facilities have since shut down. As a result, large quantities of bamboo biomass are now available, which we utilise in our thermal power plants, achieving a Thermal Substitution Rate (TSR) of nearly 60 per cent.
We have also started using bamboo as a fuel in our cement kilns, where the TSR is currently around 10 per cent to 12 per cent and is expected to increase further. From a circularity perspective, we extensively use fly ash, which allows us to reuse a major industrial waste product. Additionally, waste generated from HDPE bags is now being processed through our alternative fuel and raw material (AFR) systems. These initiatives collectively support our circular economy objectives.
As Star Cement expands, what are the key logistical and raw material challenges you face in scaling operations?
Fly ash availability in the Northeast is a constraint, as there are no major thermal power plants in the region. We currently source fly ash from Bihar and West Bengal, which adds significant logistics costs. However, supportive railway policies have helped us manage this challenge effectively.
Beyond the Northeast, we are also expanding into other regions, including the western region, to cater to northern markets. We have secured limestone mines through auctions and are now in the process of identifying and securing other critical raw material resources to support this expansion.
With increasing carbon regulations alongside capacity expansion, how do you balance compliance while sustaining growth?
Compliance and growth go hand in hand for us. On the product side, we are working on LC3 cement and other low-carbon formulations. Within our existing product portfolio, we are optimising operations by increasing the use of green fuels and improving energy efficiency to reduce our carbon footprint.
We are also optimising thermal energy consumption and reducing electrical power usage. Notably, we are the first cement company in the Northeast to deploy EV tippers at scale for limestone transportation from mines to plants. Additionally, we have installed belt conveyors for limestone transfer, which further reduces emissions. All these initiatives together help us achieve regulatory compliance while supporting expansion.
Looking ahead to 2030 and 2050, what are the key innovation and sustainability priorities for Star Cement?
Across the cement industry, carbon capture is emerging as a major focus area, and we are also planning to work actively in this space. In parallel, we see strong potential in green hydrogen and are investing in solar power plants to support this transition.
With the rapid adoption of solar energy, power costs have reduced dramatically – from 10–12 per unit to around2.5 per unit. This reduction will enable the production of green hydrogen at scale. Once available, green hydrogen can be used for electricity generation, to power EV fleets, and even as a fuel in cement kilns.
Burning green hydrogen produces only water and oxygen, eliminating carbon emissions from that part of the process. While process-related CO2 emissions from limestone calcination remain a challenge, carbon capture technologies will help address this. Ultimately, while becoming a carbon-negative industry is challenging, it is a goal we must continue to work towards.
Our strategy is to establish reliable local partnerships
Power Build’s Core Gear Series
Compliance and growth go hand in h and
Turning Downtime into Actionable Intelligence
FORNNAX Appoints Dieter Jerschl as Sales Partner for Central Europe
Our strategy is to establish reliable local partnerships
Power Build’s Core Gear Series
Compliance and growth go hand in h and
Turning Downtime into Actionable Intelligence


