Concrete
Waste Heat Utilisation is now a proven technology
Published
4 years agoon
By
admin
Sanjay Kumar Khandelwal, Head – Power Plants, JK Cement, shares details about the working of waste heat recovery systems (WHRS) and its benefits, while elaborating on the efforts undertaken by his company to become energy-efficient.
What are the alternative or renewable sources of energy used by your organisation for the process of cement manufacturing?
At JK Cement, we are at the forefront of our sustainability journey. To achieve our clean energy targets, the alternative renewable energy sources used by our organisation are solar plants, wind energy, hydel energy, biomass and waste heat recovery systems (WHRS). The use of alternative fuels and raw material (AFR) to substitute fossil fuels has also been initiated.
We have installed WHRS with all the kilns except one kiln which we are planning to install in FY 22-23. In FY21 our Green Power Mix was 25 per cent and we are working to increase it to 75 per cent by FY 2030.
We started our AFR journey in FY 2013-14 with a very small quantity and now we have achieved a TSR of 6.5 per cent in FY 2020-21. We are proud to share that we have achieved a TSR of 20 per cent at one of our plants. To achieve the TSR target of 35 per cent we have made huge investments for installation of shredder, covered storage shed and feeding arrangement for both solid and liquid waste, refuse derived fuel (RDF), plastic waste etc. Further, to overcome the operational challenges we are installing chlorine bypass, an outside burning system and more shredders are also in the pipeline. For the supply side, we have recently signed a MoU with PRESPL for the supply of biofuel and biomass to achieve the proposed TSR target of 35 per cent
When did your organisation install the WHRS in cement plants and what were the key considerations taken into account while doing the same?
The first WHRS with a capacity of 13.2 MW was commissioned in 2008 at JK Cement Works, Nimbahera. Recently in our plant at Mangrol, we upgraded the capacity to 29.1 MW from 10 MW after the installation of Kiln-3. Our objective was to generate power without any additional fuels, maximise utilisation of waste heat generated from kiln operations, minimise heat losses into the environment and finally minimise water consumption.
What was the energy consumption of the plant prior to the system and how has that changed post installation?
Installation of WHRS plays a major role in not only reducing the overall energy consumption cost but also the requirement of other available non-renewable energy resources. This has resulted in minimising the Grid and CPP as a result of implementing WHRS to meet our energy requirements. Apart from that, regular monitoring of WHRS parameters and process optimisation is being done on a regular basis to recuperate maximum heat from the system so as to generate maximum power and to keep the WHRS system efficient.
How does the process of waste heat recovery work? What is the technology used by your organisation for its functionality and monitoring?
WHRS works on the thermal Rankine Cycle concept. Steam (hot gases) emitted from the preheater exit as well as clinker cooler from the Kiln operations, enters into the WHRS system. The steam then passes through the turbine to further the power generation process.
In order to ensure that our power generation is as efficient as possible, we have adopted the best operating and maintenance practices. This includes operating from a central control room using a state-of-the-art PLC-based operating system while keeping manual intervention to a minimum. We also compare the actual results with the design and the best data on a daily basis, making any adjustments necessary in real-time besides conducting regular system audits to ensure the efficiency of our WHRS.
On an average, energy cost is around 40 per cent of the production cost for cement manufacturing. What is the impact of the waste heat recovery system on the energy cost of the cement plant?
WHRS utilises hot gases emitted both from preheater as well as clinker cooler to generate power without the usage of any additional fuel. In other words, we are able to generate power without utilising any fossil fuels; which not only reduces overall carbon footprints but also restricts hot gases from entering into the atmosphere. This system results in reducing the overall cost of production by reducing overall power consumption cost followed by a reduction in cost through optimum power mix (maximum usage of WHRS and renewable power sources and least usage of grid and CPP power) through effective power management.
The WHRS is a major contributor towards reducing the carbon footprint. Tell us about its impact and support in achieving the decarbonising goals of the cement industry.
WHRS utilises hot gases emitted both from preheater as well as clinker cooler to generate power without the usage of any additional fuel. In other words, we are able to generate power without utilising any fossil fuels; which not only reduces the overall carbon footprint but also restricts hot gases from entering into the atmosphere.
This system results in reducing the overall cost of production by reducing our power consumption cost followed by a reduction in cost through optimum power mix and through effective power management.
What other technological or automation advancements can contribute towards making the process of cement manufacturing energy optimised?
To name a few: VFD installation, PID-based automation, low DP control valve installation, high energy efficient fans, high efficient motors, PF improvement system, cross country belt conveyors for material conveying, installation of horizontal roller press (HRP) mills with lower specific energy consumption, high efficiency cooler, lower pressure drop preheater, high efficiency latest motors, mechanical conveying in place of pneumatic conveying, replacement of reciprocating compressors with screw compressors, automation of compressed air pressure as per requirement with installation of controller, adopting drip irrigations to conserve water, regular audits etc, can all go a long way in improving and optimising cement manufacturing process.
Are there any specific researches taken in the direction of finding more alternative sources of energy that have a lower impact on the environment?
At a global level, to extract heat at a low temperature range, Organic Rankine Cycle based power generation, Vapour Absorption Machine, water heating and the use of CPP are some of the latest developments, which contribute a lot in reducing the carbon footprint. However, this requires very high capital investments.
The use of green hydrogen as an alternative fuel, electrification of clinkering process, use of concentrated solar energy for producing clinker are the fields that can be explored that has the potential to lower environmental impact
How do you foresee the future of energy consumption in the cement manufacturing process and its impact on the end product cost?
World energy demand is expected to increase by 35 per cent by 2030 as developing nations have to modernise and expand their economic output. This creates a near impossible scenario for secure, low carbon energy supplies to keep pace with this demand. So, the need of the hour is to be 3 times more energy efficient!
In today’s scenario, the cement industry is becoming more and more energy efficient not only through its process optimisation but also by adopting newer technologies. Waste Heat Utilisation is now a proven technology and has become an integral part of the cement manufacturing process. AFR is another viable option that has the potential to reduce the consumption of fossil fuels. This can not only help in reducing carbon footprint but also improve cost economics besides reducing environmental impact. Other industry wastes like slag, red-mud, zinc waste etc. and hazardous wastes along with biomass are also being used.
Chemical gypsum and similar alternative raw materials are also being used in the cement process. This has not only made the manufacturing process energy efficient but has also optimised the end product cost. However, other factors like increasing fuel and raw materials cost, manpower, overheads, logistics and mining cost etc. are major concerns that can increase the end-product cost, therefore, nullifying the effect of optimisation and energy efficiency.
With a strong focus on AFR usage, the challenge that we face is in terms of its availability, utilisation, economic and technical feasibility. This also requires creating an ecosystem that supports its adoption. Therefore, regulatory authorities need to come forward and help take this to the level that has been achieved by developed countries.
-Kanika Mathur
Concrete
ACC To Expand Cement Capacity Amid Strong Infrastructure Demand
Chairman signals calibrated growth and sustainability focus
Published
16 hours agoon
June 26, 2026By
admin
ACC will continue to expand its cement capacity in a calibrated manner, deepen its ready-mix concrete (RMC) footprint and accelerate the adoption of low-carbon technologies, the company chairman conveyed in the latest annual report. The note emphasised a balanced and disciplined approach as the business pursues growth while maintaining environmental safeguards.
He argued that the long-term growth outlook for the Indian economy remains strong but that demand conditions in the near term were likely to stay moderate, necessitating cautious expansion. He pointed to India’s relatively low per capita cement consumption compared with global averages as an indicator of significant long-term potential and highlighted the rise in public capital expenditure to Rs 12 trillion (Rs 12 tn), which he said accounted for about four point four per cent of the GDP.
Against this backdrop, ACC and the wider Adani Cement business are positioning themselves as integrated building materials solution providers rather than traditional commodity suppliers, prioritising capability creation over consolidation. The chairman framed cement as the ingredient and concrete as the performance and said that infrastructure and real estate development increasingly demand engineered solutions delivered at site.
He described how deeper integration across energy, logistics and digital systems is intended to improve responsiveness and efficiency across manufacturing, transport and market operations. The company intends to strengthen technical engagement, mix optimisation and application support to improve project timelines, reduce wastage and enhance structural durability while embedding data analytics and predictive systems.
On sustainability, ACC affirmed its commitment to reducing its environmental footprint through greater use of blended cement, renewable energy, alternative fuels and improved thermal efficiency, presenting industrial growth and environmental responsibility as parallel objectives. The message positioned the group to supply engineered concrete solutions at the point of application as it scales capacity and service offerings.
Concrete
Ambuja Sees Cement Demand Easing To Around Five Per Cent In FY27
Company Cites Housing, Infrastructure And Government Capex
Published
5 days agoon
June 22, 2026By
admin
Ambuja Cements has said in its latest annual report that cement demand in India is likely to moderate to around five per cent in fiscal year twenty seven, marking a slowdown from the estimated six point five to seven point five per cent growth anticipated for fiscal year twenty six. The company described this as a transition to a more measured pace of expansion after several years of strong momentum in the sector.
It said that underlying demand drivers such as housing, infrastructure development, urbanisation and government capital expenditure remain intact and are expected to sustain cement consumption across regions. The report noted that global geopolitical uncertainties and weather risks, including forecasts of a below normal monsoon, could influence near term demand, while emphasising that the longer term infrastructure story for India continues to provide a solid foundation for the sector.
Industry observers have said that the sector may move towards mid single digit growth rates in fiscal year twenty seven after stronger performances in recent years. The company outlined a calibrated expansion strategy with capacity additions phased to match project pipelines, regional demand patterns and market absorption, seeking to avoid oversupply and pressure on pricing.
Ambuja has crossed the 100 million tonnes per annum capacity milestone (100 mn t per annum) following acquisitions and organic expansion, strengthening its position in the competitive market. The outlook in the report broadly aligns with other market assessments that placed demand at around five per cent in fiscal year twenty five, a recovery to six point five to seven point five per cent in fiscal year twenty six and an easing in fiscal year twenty seven as capacity increases. Executives remain focused on long term demand fundamentals driven by infrastructure and housing.
Gears, drives, and motors have evolved from essential mechanical components into strategic enablers of reliability, efficiency, and sustainability in modern cement plants. ICR explores how advanced motion technologies, predictive maintenance, digitalisation, and intelligent drive systems are helping cement manufacturers reduce downtime, optimise energy use, and build future-ready operations.
As the Indian cement industry prepares for another phase of capacity expansion, the focus is shifting from merely increasing production volumes to improving operational efficiency, reliability, and sustainability. According to industry estimates, India is expected to add nearly 160–170 million tonnes of cement capacity between FY26 and FY28, driven by infrastructure investments, urbanisation, and housing demand. In this environment, gears, drives, and motors have emerged as critical enablers of productivity, forming the backbone of every major process from raw material extraction and grinding to clinker production and cement dispatch.
Motors alone account for nearly 60 per cent to 70 per cent of industrial electricity consumption globally, according to the International Energy Agency (IEA), while rotating equipment failures remain among the leading causes of unplanned downtime across heavy industries. In cement plants, where equipment operates under high loads, extreme dust conditions, elevated temperatures, and continuous-duty cycles, the performance of gears, drives, and motors directly influences energy consumption, maintenance costs, plant availability, and overall profitability. As digitalisation and Industry
4.0 technologies gain momentum, these systems are evolving from passive mechanical components into intelligent assets capable of delivering real-time operational insights.
Why gears, drives, and motors are the backbone of cement plant operations
Every major process in a cement plant depends on the seamless operation of gears, drives, and motors. Raw mills, vertical roller mills, crushers, kiln drives, conveyor systems, fans, and clinker coolers all rely on rotating equipment to maintain continuous production. A failure in any one of these systems can disrupt entire process chains, highlighting their strategic importance.
Modern cement plants process thousands of tonnes of material daily, requiring equipment capable of transmitting enormous torque while maintaining precision and reliability. Kiln drives and grinding systems, in particular, operate under some of the highest mechanical loads found in industrial manufacturing. The ability of gears and motors to withstand these conditions directly impacts plant throughput and production stability.
Satish Maheshwari, Chief Manufacturing Officer, Shree Cement says, “Effective lubrication management remains one of the most critical factors in extending the lifespan of cement plant drive systems. Proper lubrication, supported by regular oil analysis, vibration diagnostics, and condition monitoring, helps minimise wear, prevent unexpected failures, and maintain the integrity of critical components such as gearboxes, motors, and drive assemblies. By identifying potential issues at an early stage, plants can move from reactive maintenance to a more proactive and reliability-focused approach.”
“Smart motors, intelligent drives, and next-generation gearboxes are set to redefine cement plant maintenance and performance. Equipped with embedded sensors, IoT connectivity, digital twins, and AI-driven diagnostics, these technologies enable real-time condition monitoring, predictive maintenance, and seamless digital integration. As the industry embraces Industry 4.0, smart drive systems will play a pivotal role in improving energy efficiency, reducing downtime, and optimising asset performance across the cement manufacturing value chain” he adds.
Industry studies suggest that rotating equipment accounts for a significant proportion of maintenance expenditure in process industries. Effective design, selection, and maintenance of gears, drives, and motors therefore have a direct influence on asset utilisation, operational efficiency, and total cost of ownership.
The cost of downtime: reliability challenges in rotating equipment
Unplanned downtime remains one of the most expensive challenges facing cement manufacturers. Industry estimates indicate that a major failure involving a critical gearbox, kiln drive, or grinding mill can result in production losses running into lakhs of rupees per hour, depending on plant capacity and operating conditions.
Sanjeev Arora, President – Motion Business & IEC LV Motors Division, ABB India says, “One of the most significant shifts taking place in industrial decision-making today is moving away from evaluating equipment based solely on upfront capital cost toward understanding total cost of ownership (TCO). In a typical motor system, the purchase price often represents only a small fraction of the total lifecycle cost however energy consumption, maintenance requirements, downtime and operating efficiency account for the vast majority of long-term operational expenses. For cement manufacturers operating in highly competitive markets, this distinction is critical.”
“A high efficiency motor paired with an appropriately configured variable speed drive may require a higher initial investment, but the long-term benefits are substantial. Reduced electricity consumption, lower maintenance needs, longer service intervals and improved process stability can deliver faster payback and stronger profitability over time” he adds.
Cement plants present a particularly challenging environment for rotating equipment. Dust ingress, thermal fluctuations, shock loads, vibration, shaft misalignment, and lubrication contamination contribute significantly to equipment degradation. Studies by SKF indicate that nearly 50 per cent of bearing failures are linked to lubrication issues and contamination, while improper alignment and vibration-related problems remain leading causes of gearbox and motor failures.
Energy-efficient motors and drives: unlocking operational savings
Energy is one of the largest operating expenses for cement manufacturers, often accounting for 25 per cent to 35 per cent of total production costs. Grinding operations alone can consume nearly 60 per cent to 70 per cent of a plant’s electrical energy, making energy-efficient motors and drives a strategic investment.
According to the International Energy Agency, high-efficiency motors combined with Variable Frequency Drives (VFDs) can reduce energy consumption by 20 per cent to 30 per cent in suitable applications. By matching motor speed and torque to actual process requirements, VFDs minimise unnecessary power consumption while reducing mechanical stress on equipment, improving both efficiency and reliability.
Advances in gearbox design and power transmission technologies
Modern gearbox technology has evolved significantly in response to the increasing demands of cement manufacturing. Advanced materials, case-hardened gears, optimised tooth profiles, improved surface finishing, and enhanced lubrication systems are helping reduce friction, wear, and thermal loading.
Girish Hanchate, Director – Industrial Market, India SKF India (Industrial) says, “Smart diagnostics are significantly improving the lifecycle of gears, motors, and other rotating equipment by enabling a shift from reactive maintenance to condition-based asset management. Hidden issues such as vibration anomalies, bearing defects, misalignment, and temperature fluctuations can quietly reduce plant throughput by 10 per cent to 20 per cent while increasing energy consumption long before a breakdown occurs. By leveraging advanced sensors, predictive analytics, machine learning, and real-time monitoring of vibration, temperature, and motor current, cement manufacturers can detect developing faults early, optimise maintenance schedules, and prevent costly secondary damage. This not only improves reliability but also supports energy efficiency and sustainability objectives.”
“The next major evolution in drive and bearing technology lies in the development of fully integrated smart mechanical ecosystems that combine high-performance bearings, advanced lubrication management, and digital intelligence. Sensor-enabled condition monitoring embedded directly within bearings and drive systems allows operators to capture critical operational data at the source, enabling predictive maintenance and real-time performance optimisation. Innovations such as SKF’s VA9A1 Spherical Roller Bearing series, engineered specifically for demanding cement applications such as crushers and kilns, demonstrate this trend. By increasing internal bearing space and optimising lubricant flow, these designs improve grease retention, reduce wear, minimise downtime, and create more resilient, energy-efficient rotating equipment systems for the future of cement manufacturing” he adds.
Manufacturers are increasingly focusing on compact, high-torque gearbox designs capable of delivering higher power density while maintaining service life. Innovations such as condition-monitored gear systems, improved sealing technologies, and modular gearbox architectures are simplifying maintenance while enhancing operational reliability.
Predictive maintenance, condition monitoring, and asset health management
The shift from reactive to predictive maintenance is transforming asset management across the cement industry. Technologies such as vibration monitoring, thermography, oil analysis, ultrasound testing, and motor current signature analysis are enabling operators to identify potential failures before they occur.
Research by Deloitte suggests that predictive maintenance can reduce breakdowns by up to 70 per cent and lower maintenance costs by 25 per cent. In cement plants, where shutdown windows are limited and equipment operates continuously, predictive maintenance offers a powerful tool for improving reliability and extending asset life.
Digitalisation, industry 4.0, and the rise of intelligent drive systems
Industry 4.0 technologies are redefining the role of gears, drives, and motors. Smart sensors embedded within motors, bearings, and gear systems can continuously monitor temperature, vibration, load, lubrication condition, and energy consumption.
Girish Hanchate says, “As the industry embraces automation, sustainability, and digital transformation, the importance of intelligent motion technologies will continue to grow. The convergence of advanced engineering, predictive maintenance, and Industry 4.0 solutions is creating a new generation of cement plants where reliability, efficiency, and sustainability work together to deliver long-term value. For cement manufacturers navigating increasing production demands and environmental expectations, investing in smarter gears, drives, and motors is no longer optional—it is a business imperative.”
Cloud-based monitoring platforms and Industrial Internet of Things (IIoT) architectures enable maintenance teams to access equipment health data remotely, improving visibility across geographically dispersed operations. Advanced analytics and
artificial intelligence are further enhancing fault detection capabilities, enabling more accurate maintenance planning.
The emergence of digital twins represents another significant development. By creating virtual replicas of physical assets, operators can simulate operating conditions, predict failures, optimise maintenance schedules, and improve lifecycle management decisions. These technologies are helping transform rotating equipment into intelligent assets that actively contribute to operational decision-making.
Building future-ready cement plants through smart motion technologies
The future of cement manufacturing will depend heavily on the ability to integrate mechanical reliability with digital intelligence. Smart motion technologies combine high-efficiency motors,
intelligent drives, condition monitoring systems, and automation platforms to create more responsive and efficient operations.
Sustainability goals are also accelerating investment in advanced motion technologies. Reduced energy consumption, improved equipment efficiency, and extended asset life contribute directly to lower carbon emissions and reduced resource consumption.
These benefits align closely with the industry’s decarbonisation objectives.
As capacity expansions continue across India, future-ready cement plants will increasingly prioritise reliability, flexibility, and data-driven decision-making. Organisations that successfully integrate smart motion technologies into their operations will be better positioned to reduce costs, improve productivity, and maintain a competitive advantage in a rapidly evolving market.
Conclusion
Gears, drives, and motors are no longer viewed solely as mechanical components; they have become strategic assets that influence every aspect of cement plant performance. Their reliability affects production continuity, their efficiency impacts operating costs, and their digital capabilities increasingly shape maintenance and operational strategies.
- –Kanika Mathur
ACC To Expand Cement Capacity Amid Strong Infrastructure Demand
Ambuja Sees Cement Demand Easing To Around Five Per Cent In FY27
Powering Cement Through Intelligent Motion
Liquid Intelligence
The Logistics Imperative
ACC To Expand Cement Capacity Amid Strong Infrastructure Demand
Ambuja Sees Cement Demand Easing To Around Five Per Cent In FY27
Powering Cement Through Intelligent Motion
Liquid Intelligence

