Concrete

Rationalising cement plant design

Published

12 years ago

August 31, 2014

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If the capacities are more or less fixed and the variables in plant design lie in a narrow range, then why can?t we have standard modular cement plants?
In the recent past, very few cement projects have been announced and taken up for implementation. India?s investment growth, which was quite robust during the last decade, has fallen substantially in the last two years. Several reasons have been attributed for this present dearth of ongoing cement projects; policy uncertainty, delayed project approvals, land acquisition issues, economic slowdown leading to uncertain markets, high interest rates, supply side bottlenecks, et al. Irrespective of whether it is due to some or all of these reasons, the fact remains that the commencement of any and every cement project today, is considerably delayed from earlier times. It therefore becomes necessary to reduce and crash project implementation timelines to ensure that revenue flows start as soon as possible. Quite often, the viability of a project may hinge on this.
The design and engineering of a cement plant can play a significant role in reducing project times, but this can only be achieved with proactive cooperation and teamwork between the customer, technology supplier and the designer.

The typical cycle
In a typical project plan of a cement plant, it is generally accepted that the time between the placement of the first major purchase order and first excavation at site is at least six months, provided the customer places an EPC order on a major cement machinery supplier having adequate resources for carrying out simultaneous engineering on multiple streams. If, on the other hand, the customer opts to place individual equipment orders on OEMs, this time period could stretch to anywhere between eight to eleven months. In the equipment ordering mode, it is the customer who bears the responsibility of coordination between the OEMs, the consultant and the contractors at site.

The purpose of this article is to stimulate some out-of-the-box thinking to evaluate and check if even the accepted six months between the first purchase order and first excavation, can be reduced further. We shall not attempt this in the case of equipment ordering mode as the intense coordination, required between customer, OEMs and the consultant for even the first release of construction drawings, shall automatically ensure delays.

Common patterns
Let us start with the future sizes of cement plants. Today, most of the large limestone deposits in India have been either tied up or already exploited. The existing deposits are far away from urban centres, which are the large consumers of cement. It is therefore likely that the days of 10,000 tpd plus cement plants are over, and that the plants of the future are likely to be in the 5,000 to 7,000 tpd range. This size will help in exploiting smaller deposits, which are also likely to be more accessible from a logistics point of view. While this article does not rule out the large plants completely, it is our contention that the majority of the plants of the future are likely to be in the 5,000 to 7,000 tpd range.

With the need to cover the stockpiles, all the material storages will have to be either silos or longitudinal storages. The storage capacities of these stockpiles in terms of number of days for various materials like limestone, additives, clinker, coal and gypsum are also fairly standardised.

Most of the deposits today are located away from existing railway lines. Thus, the primary mode of transport of materials to and from the plant is likely to be road. Most plants are located on fairly flat ground and minor undulations in the ground are levelled off and the plinth levels of all the process buildings in the plant are usually considered at one level.

The systems ultimately selected by most customers are also fairly standard. Vertical roller mills for raw and coal grinding, reverse air bag houses for de-dusting of kiln gases, six stage pre-heaters, three support kilns, coolers, ESPs for cooler gases and clinker tanks for clinker storage, are the norm for most plants. The central portion of the plant, which is considered the heart of the cement plant stretching from the raw mill, through the blending silo, pre-heater, kiln, cooler up to the clinker silo, are usually laid out in a straight line.

Hence, one can see that the so-called ?variables? in a cement plant generally lie within a narrow band of values, and can therefore be frozen at an optimum value. And this brings us to the central question of this article. Why are all cement plants today designed from first principles, going through the motions of obtaining equipment drawings from the OEMs, preparing general arrangement drawings of the process buildings and designing the civil structures to finally produce construction drawings?

It is suggested for the technology suppliers and the EPC contractors to get together and pre-engineer the plants to be ready with at least the general arrangement drawings and a portion of the civil design of the main process buildings. If the 3D models of the buildings are made ready, the site conditions, which vary from site to site, can be factored in and the required analysis can be done expeditiously.

Standard solutions to save time
The idea is to standardise and modularise the heart of the cement plant such that the final general arrangement drawings are ready before the customer orders the plant. It can be seen that, for a particular plant size, at the most, three sizes of raw mills will be sufficient to handle the variations in the grindability of different types of limestone. An additional fourth size means that the next plant size can be catered to. Three sizes each of blending and clinker silos will suffice to fulfil most customer requirements, for two plant capacities, 5,000 and 7,000 tpd. The cyclone pre-heater, kiln, cooler and coal mill sizes are usually decided once the rated capacity of the plant is frozen. The layout of the modules can be prepared in such a manner that it is possible to remove a module of one size and plug in one of another size without affecting the rest of the layout.

Thus, most of the engineering related to layouts can be completed earlier and about four to six weeks can be saved from the six months for engineering as mentioned earlier. This is possible only in an EPC mode of ordering. When the customer chooses to order the plant as individual equipment or even as packages, there is a certain amount of sequencing that gets inherently built in to the project management process. In this case, the customer becomes the hub and the rest of the stakeholders, the spokes. Every major activity between the stakeholders needs to be ratified or approved by the customer, thus inserting points of delay in the entire process. In EPC mode, this coordination between receipt of equipment drawings, preparation of general arrangement drawings and civil design happens internally with the customer being kept in the loop at all times. While the customer can interject whenever necessary, the mandatory customer approval, that is required in the other modes, does not hinder or delay the process. The customer thus manages the project by exception.

Another area that frequently remains unaddressed is rationalisation or streamlining. When the plants are ordered in package mode, the customer attempts to bring together the OEMs, the consultant and the civil and mechanical contractors, and hopes that between them, they will put together the most cost-effective plant. But if one looks at the post-order value drivers for the stakeholders, none of them have a genuine interest in reducing wasteful civil quantities. The OEMs and consultant are interested in reducing the man-hours they spend on the project, to cut their costs. The contractors are paid per cubic metre of concrete or tonne of steel and do not have a say in rationalising the layouts or civil designs. That is why, at the end of a project, most customers have a nagging In an EPC mode, the EPC contractor is simultaneously responsible for layouts and civil design. He is in a better position to bring about rationalisation of the plant. An added advantage is that site queries that usually crop up during construction are handled more expeditiously because the civil design is in-house. But that advantage is not relevant here.

If pre-engineering, as suggested above, is also carried out, the EPC contractor has more time to rationalise and can therefore do a better job. The customer needs to play a significant role in this process. Tempting as it may be, he needs to curb the natural tendency to make changes in the pre-engineered layouts. Changes to be incorporated will set back the process several steps and squander away the time gains expected from this approach.

To summarise
If cement plant sizes can be standardised to some popular capacities, it is possible for EPC contractors to modularise the main process sections and pre-engineer some of the critical paths in the project in order to save valuable project implementation time.

Concrete

ACC To Expand Cement Capacity Amid Strong Infrastructure Demand

Chairman signals calibrated growth and sustainability focus

Published

15 hours ago

June 26, 2026

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 ago

June 22, 2026

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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.

Concrete

Powering Cement Through Intelligent Motion

Published

1 week ago

June 17, 2026

admin

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.