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Today, there is a greater focus not only on optimising fuel/ energy efficiency during various processes of cement manufacturing, storage and its distribution, but there is a renewed focus on making the cement industry ‘greener and more sustainable. The Indian cement industry is probably one of the most energy efficient in the world today. Some of the plants have thermal and electrical specific energy consumption (SEC’s) comparable to the best cement plants in the world resulting in low emission intensities. The industry which is on the top in the Certified Emission Reductions Projects list registered with the Clean Development Mechanism (CDM) of the Kyoto Protocol has contributed significantly to the eco-friendly use of industrial wastes and thereby has succeeded in reducing its carbon footprint. INDIAN CEMENT REVIEW trains a spotlight on the efforts by the cement manufacturers to make the industry more sustainable.

TAKING a holistic view on sustainability Edward Schwarz, General Manager, Holcim Foundation for Sustainable Construction, had this to say: ‘Holcim Foundation stands for sustainable construction and this is financed and sponsored completely by Holcim, which is one of the big international producers of cement. The goal of the foundation is to promote sustainable construction and now of course, if you think of sustainable construction, especially from the cement industry, you think of durable concrete or things like that or less energy in production. That’s true, of course, but that is not the full picture. So the full picture of sustainability is much boarder. It touches every element of our life. So it has to do with energy saving, using fewer resources, recycling. It has to do with economics because somebody has to pay for it all and it has to pay for itself. And it has to do with people because whatever we do with nature or with products it is always impacting people."

Says Sandeep Shrivastava, Head, Environment, Ambuja Cement, Being in the business of cement manufacturing, climate change mitigation and low carbon growth has always been integral to our sustainability strategy. Being carbon smart is our aspiration. At ACL, we have had a climate change mitigation policy since January, 2008. The policy describes our approach to reduce, engage and influence. This is through the involvement of our employees and business partners, like suppliers. Our strategy takes into account several levers available for the reduction of our carbon footprint, such as reduction in clinker factor, improving thermal energy efficiency and process technology, optimising fuel composition, including the use of waste as fuel, waste heat recovery, and renewable energy. Each of these levers has specific initiatives and road maps for the next three years and beyond to reduce the organisational carbon footprint."

Sandeep further adds, ‘As a part of its sustainability initiatives and climate change policy, Ambuja Cement has estimated the enterprise level carbon footprint and offsets for the year 2010. The scope of the footprint estimation covered all our manufacturing facilities, bulk cement terminals and the corporate offices as well as plantation activities within our plant premises for determining the carbon offsets. The results of the carbon footprint estimation have been externally verified in accordance with the international standard ISO 14064-1:2006 by Bureau Veritas India. Ambuja Cement is India’s first cement company to have achieved this milestone. With this, we have clearly taken a leadership position in climate conscious growth." ‘We are also disclosing our carbon emissions as part of the Carbon Disclosure project (CDP) initiative of CII & WWF. Ambuja is also an active member of Cement Sustainability Initiative (CSI)’s India- specific Low Carbon Technology Road Map project and also participating in the Phase II of this project. Our sustainability performance including the climate change mitigation strategy, plan and results are disclosed through our sustainability report issued every year. This is as per the Global Reporting Initiative (GRI) guidelines and attains the highest A+ rating," Sandeep says.

According to BK Singh, Sr. Exec Director-Group Marketing & Corporate Communication, Dalmia Bharat, awareness of sustainability in the cement industry has picked up momentum in recent years. Several efforts are on to integrate sustainability issues (essentially in energy conservation, resource optimisation and environment) with business planning and reviews. Major focus areas for sustainability by the cement industry are energy conservation, waste heat recovery, clinker to cement factor, alternate fuel and blended cements. ‘Dalmia Cement is a member of CSI (Cement Sustainability Initiative, under the aegis of the WBCSD, Geneva). Consequently, it is bound by the CSI’s Charter on Sustainability. We adhere to the exacting and very comprehensive standards of the CSI. As a part of our commitment, we are in the process of publishing the Sustainability Report from the financial year 2013-14. In Specific Energy Consumption, we are carrying out energy audit to identify energy saving potential. Internally, an exclusive energy conservation team focuses on the critical areas of raw and coal mill, captive power plant, compressors, pumps, packing plants and ball mill. Monitoring energy consumption daily on several metrics and taking corrective measures wherever necessary," says Singh. Says Sumit Banerjee, Vice- Chairman, Reliance Cement, ‘CO2 emissions on account of cement are expected to go up to 488 million tonnes from about 145 million tonnes in 2010 if no action is taken on carbon emission levers. The industry need to focus on five broad categories of carbon emission reduction levers: thermal and electrical energy efficiency, co-processing of alternate fuels and raw materials, clinker substitution, waste heat recovery for power generation and adoption of new technologies like CCS (Carbon Capture and Storage), algal growth promotion and use of bio-fuels." According to Banerjee technological improvement is a key pillar in the cement industry’s drive to reduce emissions levels and energy consumption. Banerjee says, ‘Research and development investments have enabled cement producers worldwide to install modern, energy-efficient technology in new, and to some extent, in existing, cement plants. New technologies have enabled increased use of clinker substitutes and alternative fuels in cement production, leading to significant direct (e.g. from limestone decarbonisation and fuel burning) CO2 emissions reductions. Technology developments have also enabled significant indirect emissions reductions (e.g. from electricity use). The Indian cement industry have comparatively better technology as most of the plants are new and they are equipped with latest technologies. Indian cement industry has taken various measures to upgrade their old plants and to achieve higher energy efficiency."

‘KCP has designed the road map with milestones to achieve the CO2 emissions reductions required for future. We are also putting all efforts for shifting from OPC to blended cements. It was targeted to increase blended cement percentage from the present 35 to 55 per cent by this year- end and one hundred percent by 2015, says Dr GVK Prasad, Executive President -Operations, KCP. Speaking about the importance of high efficiency pollution control equipment used for cement kilns, raw mills, coal mills and power plants Prasad had this to say, ‘KCP designed and operating all their pollution control equipments with emission levels less than 25 mg/Nm3 as against PCB norm of 50 mg/Nm3. KCP is the first cement company installed bag filter for de-dusting of cooler gases in their cement unit-I and working successfully for last 15 years. In our cement unit-II, all bag filters are provided stand by chambers where in we can attend maintenance job during operation without affecting the performance. In addition, one additional chamber provided in cooler ESP to take care of emission level whenever problem in one of the chambers. In our CPP, KCP is first time in installing hybrid bag filter consist of ESP and bag filter to ensure the emission levels less than 25 mgs/Nm3 even change in fuel properties."

According to Suman Mukherjee, Managing Director and CEO, SDCC -India, though the Indian cement industry is one of the most efficient in the world, it still produced 137 mt of CO2 in 2010 -approximately 7 per cent of India’s total man-made CO2 emissions. Mukherjee adds, ‘The Indian cement industry has made strong efforts to reduce its carbon footprint. It has successfully reduced CO2 emission from 1.12 T CO2 per tonne cement in 1996 to 0.719 T CO2/T cement in 2010. Key levers to reduce emission in the Indian cement industry are increased rates of blending leading to a reduction in clinker to cement ratio, increased use of AFR, widespread implementation of WHR, transportation of raw materials through conveyor belt instead of road transport, installation of various VFD/high energy- efficient equipment to reduce SPC."

Says Schwarz, ‘The production of cement in the US and India is exactly the same. Of course, 20 years ago, one started to install filters and before that, nobody had filters; then you started to improve the system, then you started to reuse heat. There was and are two triggers. The trigger on the one hand, is the environment and on the other hand, it is economics. With the filter you lose less material, so you can sell more. If you use less energy, you pay less for the energy. If you have less dust, you do not have to clean it and you can use it as a product."

He sums it up: ‘Sustainability is something we all have to live up to, for ourselves and for the generations after us. If the world were to continue living and consuming as we did in the 80s, in few years there would not be anything left for anyone anymore. So, we have to make resources last for more people, for a longer time. That is a challenge and I think it is one of the basics of sustainable thinking, remembering that we are not the last on this planet."

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Concrete

We engineer smarter systems to reduce waste

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Naveen Kumar Sharma, AVP – Sales and Marketing, Toshniwal Industries, talks about redefining instrumentation with customised, digitally enabled solutions engineered for harsh plant environments.

For over six decades, Toshniwal Industries has played a pioneering role in advancing process instrumentation for Indian manufacturing. In this exclusive conversation with Kanika Mathur, Naveen Kumar Sharma, AVP – Sales & Marketing, explains how the company designs kiln and grinding plant solutions tailored to the unique demands of the cement industry. As plants transition to higher AFR use and smarter automation, Toshniwal’s technologies offer greater reliability, accuracy and predictive insight.

Tell us how are your process instruments and condition monitoring system customised for cement kilns and grinding plant operations?
Toshniwal is a company with a legacy of over 65 years, and our experience has taught us that cement kilns and grinding units are fundamentally different in their operational demands. As an Indian company, we understand the unique requirements of Indian cement manufacturers. We work closely with our customers, engage deeply with their technical teams, and study operational challenges in real-time.
Based on these insights, we customise our solutions for both kiln and grinding applications. This tailoring is not just at a product level, but at a solution level—engineering design, instrumentation logic, and process optimisation. Our primary objective, for both the industry and our customers, is to reduce yield loss. Every customisation we implement is driven by this goal. We engineer smarter systems to reduce waste, improve consistency and increase plant reliability.
Ultimately, our solutions are built on an understanding that cement manufacturers require robust, practical and maintainable instruments. We design with this mindset so plants can operate more efficiently, with better control and higher profitability.

With the rising use of AFR, how do your solutions support thermal zone reliability and process time?
Our solutions are built around four core parameters: energy efficiency, yield loss reduction, product quality and environmental responsibility. These pillars drive our engineering decisions and define how our technologies support cement plants, especially as they adopt alternative fuels and raw materials (AFR).
We strongly believe in energy conservation. Every product we offer—whether for thermal monitoring, kiln control or flame optimisation—is engineered to improve energy performance. Reducing yield loss is another principle deeply embedded in our solutions, because production interruptions and material losses directly affect plant profitability and clinker quality.
We are also highly conscious of the end-product quality delivered by our customers to their markets. Consistency in burning, heat transfer, and thermal profiling directly influences clinker characteristics, and our instruments help maintain this stability.
Lastly, and most importantly, we care about the environment. We want to leave a greener world for the next generation. This mindset aligns with India’s digitalisation movement, advocated by our Prime Minister. Digital technologies are crucial for optimising AFR use, process stability, emissions and kiln efficiency. We are proud to contribute to this transition.
By optimising flame patterns, energy use, and pollution, our solutions deliver direct and indirect savings. Plants benefit from lower operational losses, reduced maintenance, and improved reliability, especially in pyroprocessing zones.

Tell us how do you address harsh environment challenges in cement plants, say dust, temperature, etc. with your sensor and monitoring?
This is a very important question because cement plants, steel plants, and power plants operate in extremely harsh environments. There are two major categories of specifications that we must respect while designing solutions: technical specifications and environmental specifications. Technical specifications relate to performance accuracy, measurement integrity, responsiveness and process safety. Environmental specifications, on the other hand, relate to high temperatures, heavy dust, humidity, vibrations and corrosive atmospheres. Our solutions are engineered to withstand both. We customise sensors, housings, mounting mechanisms and protective systems so that our instruments operate at 100 per cent functionality in harsh conditions. We ensure that the plant experiences minimal downtime from our systems. That is our engineering philosophy—solutions must work reliably in real-world environments, not just in ideal laboratory conditions.

What retrofit pathways do you offer for older cement lines to upgrade measurement and monitoring systems and how is the Indian market responding?
Every solution we provide is scalable and digitally adaptable. Technology evolves rapidly, and our offerings evolve with it. When we upgrade instruments or monitoring systems, we design them to integrate with existing plant infrastructure, so customers do not have to rebuild everything from scratch. Once our solution is installed, software upgrades or performance improvements can often be deployed without major cost. This ensures that customers continue to benefit from ongoing technological advancements. The Indian market has responded positively to this approach. Plant operators appreciate solutions that are future-ready and dynamic rather than static. Scalability helps them maintain competitiveness, extend asset life, and move toward smart manufacturing with confidence.

So how is your organisation leveraging digital technologies in your instrumentation portfolio for cement plants?
Digitalisation is at the core of every product we manufacture. We stand firmly behind the digital movement, not only because it represents efficiency, but because it is the direction in which the Indian industrial ecosystem is evolving. We deploy machine-vision technologies, advanced inline monitoring systems, and solutions capable of visualising the
inside of the furnace. These systems help reduce downtime, enable predictive asset management and provide actionable analytics to customers. All our technologies communicate seamlessly with Level 1, Level 2, and Level 3 automation. This allows integration across SCADA, DCS, ERP, and cloud ecosystems. Digitalisation for us is not an add-on—it is foundational to how our instrumentation is built.

What are your key innovation priorities to help Indian cement plant producers hit harder, higher substitution rates, lower emissions and smarter processing?
Sustainability is a national priority, and we are committed to supporting it. Our current portfolio already helps improve efficiency, reduce emissions, and support alternative fuel integration. But our innovation roadmap goes further. We are now developing specialised productivity-oriented software modules that will provide proactive alerts—not just alarms triggered after a fault has occurred. These modules will leverage artificial intelligence and machine learning to detect patterns early. The intention is to help plant teams take corrective actions ahead of time, reducing yield loss and environmental impact. Instead of informing the plant that a disruption has happened, the system will indicate that a disruption will happen, giving operators time to prevent it. We believe that within the next 12 to 18 months, we will launch these predictive solutions in combination with our instrumentation. When implemented, they will significantly improve decision-making, process stability and environmental performance across the Indian cement sector.

– Kanika Mathur

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Concrete

India donates 225t of cement for Myanmar earthquake relief

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On 23 May 2025, the Indian Navy ship UMS Myitkyina arrived at Thilawa (MITT) port carrying 225 tonnes of cement provided by the Indian government to aid post-earthquake rebuilding efforts in Myanmar. As reported by the Global Light of Myanmar, a formal handover of 4500 50kg cement bags took place that afternoon. The Yangon Region authorities managed the loading of the cement onto trucks for distribution to the earthquake-affected zones.

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Concrete

Reclamation of Used Oil for a Greener Future

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In this insightful article, KB Mathur, Founder and Director, Global Technical Services, explores how reclaiming used lubricants through advanced filtration and on-site testing can drive cost savings, enhance productivity, and support a greener industrial future. Read on to discover how oil regeneration is revolutionising sustainability in cement and core industries.

The core principle of the circular economy is to redefine the life cycle of materials and products. Unlike traditional linear models where waste from industrial production is dumped/discarded into the environment causing immense harm to the environment;the circular model seeks to keep materials literally in continuous circulation. This is achievedthrough processes cycle of reduction, regeneration, validating (testing) and reuse. Product once
validated as fit, this model ensures that products and materials are reintroduced into the production system, minimising waste. The result? Cleaner and greener manufacturing that fosters a more sustainable planet for future generations.

The current landscape of lubricants
Modern lubricants, typically derived from refined hydrocarbons, made from highly refined petroleum base stocks from crude oil. These play a critical role in maintaining the performance of machinery by reducing friction, enabling smooth operation, preventing damage and wear. However, most of these lubricants; derived from finite petroleum resources pose an environmental challenge once used and disposed of. As industries become increasingly conscious of their environmental impact, the paramount importance or focus is shifting towards reducing the carbon footprint and maximising the lifespan of lubricants; not just for environmental reasons but also to optimise operational costs.
During operations, lubricants often lose their efficacy and performance due to contamination and depletion of additives. When these oils reach their rejection limits (as they will now offer poor or bad lubrication) determined through laboratory testing, they are typically discarded contributing to environmental contamination and pollution.
But here lies an opportunity: Used lubricants can be regenerated and recharged, restoring them to their original performance level. This not only mitigates environmental pollution but also supports a circular economy by reducing waste and conserving resources.

Circular economy in lubricants
In the world of industrial machinery, lubricating oils while essential; are often misunderstood in terms of their life cycle. When oils are used in machinery, they don’t simply ‘DIE’. Instead, they become contaminated with moisture (water) and solid contaminants like dust, dirt, and wear debris. These contaminants degrade the oil’s effectiveness but do not render it completely unusable. Used lubricants can be regenerated via advanced filtration processes/systems and recharged with the use of performance enhancing additives hence restoring them. These oils are brought back to ‘As-New’ levels. This new fresher lubricating oil is formulated to carry out its specific job providing heightened lubrication and reliable performance of the assets with a view of improved machine condition. Hence, contributing to not just cost savings but leading to magnified productivity, and diminished environmental stress.

Save oil, save environment
At Global Technical Services (GTS), we specialise in the regeneration of hydraulic oils and gear oils used in plant operations. While we don’t recommend the regeneration of engine oils due to the complexity of contaminants and additives, our process ensures the continued utility of oils in other applications, offering both cost-saving and environmental benefits.

Regeneration process
Our regeneration plant employs state-of-the-art advanced contamination removal systems including fine and depth filters designed to remove dirt, wear particles, sludge, varnish, and water. Once contaminants are removed, the oil undergoes comprehensive testing to assess its physico-chemical properties and contamination levels. The test results indicate the status of the regenerated oil as compared to the fresh oil.
Depending upon the status the oil is further supplemented with high performance additives to bring it back to the desired specifications, under the guidance of an experienced lubrication technologist.
Contamination Removal ? Testing ? Additive Addition
(to be determined after testing in oil test laboratory)

The steps involved in this process are as follows:
1. Contamination removal: Using advanced filtration techniques to remove contaminants.
2. Testing: Assessing the oil’s properties to determine if it meets the required performance standards.
3. Additive addition: Based on testing results, performance-enhancing additives are added to restore the oil’s original characteristics.

On-site oil testing laboratories
The used oil from the machine passes through 5th generation fine filtration to be reclaimed as ‘New Oil’ and fit to use as per stringent industry standards.
To effectively implement circular economy principles in oil reclamation from used oil, establishing an on-site oil testing laboratory is crucial at any large plants or sites. Scientific testing methods ensure that regenerated oil meets the specifications required for optimal machine performance, making it suitable for reuse as ‘New Oil’ (within specified tolerances). Hence, it can be reused safely by reintroducing it in the machines.
The key parameters to be tested for regenerated hydraulic, gear and transmission oils (except Engine oils) include both physical and chemical characteristics of the lubricant:

  • Kinematic Viscosity
  • Flash Point
  • Total Acid Number
  • Moisture / Water Content
  • Oil Cleanliness
  • Elemental Analysis (Particulates, Additives and Contaminants)
  • Insoluble

The presence of an on-site laboratory is essential for making quick decisions; ensuring that test reports are available within 36 to 48 hours and this prevents potential mechanical issues/ failures from arising due to poor lubrication. This symbiotic and cyclic process helps not only reduce waste and conserve oil, but also contributes in achieving cost savings and playing a big role in green economy.

Conclusion
The future of industrial operations depends on sustainability, and reclaiming used lubricating oils plays a critical role in this transformation. Through 5th Generation Filtration processes, lubricants can be regenerated and restored to their original levels, contributing to both environmental preservation and economic efficiency.
What would happen if we didn’t recycle our lubricants? Let’s review the quadruple impacts as mentioned below:
1. Oil Conservation and Environmental Impact: Used lubricating oils after usage are normally burnt or sold to a vendor which can be misused leading to pollution. Regenerating oils rather than discarding prevents unnecessary waste and reduces the environmental footprint of the industry. It helps save invaluable resources, aligning with the principles of sustainability and the circular economy. All lubricating oils (except engine oils) can be regenerated and brought to the level of ‘As New Oils’.
2. Cost Reduction Impact: By extending the life of lubricants, industries can significantly cut down on operating costs associated with frequent oil changes, leading to considerable savings over time. Lubricating oils are expensive and saving of lubricants by the process of regeneration will overall be a game changer and highly economical to the core industries.
3. Timely Decisions Impact: Having an oil testing laboratory at site is of prime importance for getting test reports within 36 to 48 hours enabling quick decisions in critical matters that may
lead to complete shutdown of the invaluable asset/equipment.
4. Green Economy Impact: Oil Regeneration is a fundamental part of the green economy. Supporting industries in their efforts to reduce waste, conserve resources, and minimise pollution is ‘The Need of Our Times’.

About the author:
KB Mathur, Founder & Director, Global Technical Services, is a seasoned mechanical engineer with 56 years of experience in India’s oil industry and industrial reliability. He pioneered ‘Total Lubrication Management’ and has been serving the mining and cement sectors since 1999.

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