Concrete
Maximising AFR in Cement Manufacturing
Published
2 years agoon
By
Roshna
Shreesh A Khadilkar, Consultant and Advisor, and Former Director Quality and Product Development, ACC Ltd Thane, discusses the importance of optimising the use of alternative fuel and raw materials (TSR percentage) in cement production without affecting clinker quality.
We all know that in the calciner the CaCO3 undergoes calcination producing CaO, part of this CaO reacts with Al2O3, Fe2O3 SiO2 to form aluminates, ferrites, Belite and some CaO remain as uncombined CaO in the material that enters the kiln, this uncombined CaO further reacts, as the material passes through the kiln to form clinker of desired phase composition with at desired levels of free lime. If this uncombined CaO is less, the resultant clinker would have lower free CaO.
Due to fluctuations of moisture in the SAFR feed, the calciner outlet temperature tends to decrease/fluctuate although the calcination is complete, some of the above post calcination reactions of the CaO are decreased, as a result the uncombined CaO is higher, in the material entering the kiln. The reactions in the kiln are affected for the same throughput and either the clinker free lime is high or the clinker shows lesser C3S percentage (depending on the burnability of the kiln feed).
In plants equipped with XRD it would be possible to monitor the uncombined CaO in Hot meal and optimise the Calciner outlet temperatures so as to achieve the desired uncombined percentage of lime as explained above. If the value is much lower than the desired level it would indicate subsequent lower LSF in the clinker, so addition of lime sludge or limestone powder as explained above would maintain the desired clinker specs. These actions, if affected during the day, would help maintain the day’s average clinker quality.
Besides the variability of the moisture percentage, the ash percentage and its composition in SAFR could change the composition of calcining material and finally depending on these changes, the post calcination reactions would be affected, depending on the uncombined percentage of lime value (monitored by XRD of hot meal), the corrections as explained above would help correct the composition and maintain the burning zone performance and the resultant clinker quality. Thus, if the calciner outlet temperature / kiln inlet material / C6 material temp. (as the case may be) is maintained higher and necessary corrections are made through SAFR or through the kiln feed. We can maintain the uncombined CaO at desired level where we could get good kiln performance as well as a good/improved clinker quality even at a higher percentage of AFR/TSR.
In many plants there is a tendency to increase the clinker Fe2O3 as and when there is an excessive dust generation and dusty kiln performance, this attempt to increase Clinker Fe2O3 would not actually help in improving the kiln conditions and maintaining clinker quality. In another plant equipped with XRD, the limestone had higher Fe2O3 content and to compensate for the effect of the varying moisture of SAFR the Calciner outlet temperature was maintained at around 920oC so that the desired post calcination reactions could be achieved and the uncombined CaO (monitored by XRD of hot meal) was maintained at desired levels.
The clinker LSF also could be maintained but the Free CaO tended to be high. The hot meal XRD indicated that the belite formations were lower in hot meal as and when the clinker free lime was high. Although the Silica was contributed from the Solid AFR as this silica was sand/silt, which did not react, the clinker IR also was observed to increase by around 0.4 per cent use of pondash (having reactive silica) along with the solid AFR up to 1 per cent was observed to increase the Belite content of hot meal and the resultant clinker had desired phase formations with lower free lime. For calculation of PSF/Potential phase composition a correction was given to the clinker silica contents (by subtracting the change in IR of clinker).
Thus, it needs to be noted here that in RDF/MSW, SAFR the ash content may have coarse sand grains, which cannot at the calcination stage and it the burnability is sensitive to silica contents, such corrections of use of wet fly ash with the SAFR could be advantageous to maintain clinker quality. However, these corrections have to be affected during the day through XRD monitoring of Hot meal and subsequent Clinker (say after 40 minutes) so that at the end of the day the clinker is of desired quality specs.
Thus, in plants coprocessing higher levels of AFR it is recommended to have a ‘bi-hourly dashboard’ and the day average clinker consistency in Quality Monitored by ‘compliance percentage to clinker specs’ as shown in Tables 1 and 2.
Such a dashboard helps having the entire plant operations involved in taking bi hourly actions so as to maintain the quality and process targets with increase in SAFR/LQAFR thus, achieving a higher compliance percentage to clinker quality specs. This has enabled not only to maintain clinker quality but it also showed improvements in clinker quality.
Actions: In plant with high TSR percentage without XRD
The hot meal samples at different kiln inlet material temperatures were collected at 870,900n and 930oC along with corresponding clinker samples (after say 40 minutes) and the XRD analysis was carried out at external labs. Through the bi-hourly dashboard actions the clinker compositions were maintained as per desired target. The XRD Mineralogy of Hot Meal and clinker XRD are tabulated in Table 3.
Although the plant maintains 95 per cent DOC, the XRD however indicates >99.5 per cent calcination. Thus, even in the absence of XRD using the bi-hourly dashboard optimisation of clinker quality can be made possible, however having an XRD (even a low watts XRD) would always be advantageous, especially if the kiln feed shows moderate burnability.
Other important considerations
- As discussed above bi-hourly corrections made to clinker composition could be through the SAFR/RDF mix, in one plant it could be use of waste lime sludge/ in another plant use of wet pond ash/ in another use of limestone crusher dust/ high grade limestone powder depending on the corrections desired.
- In case such materials are not available in the plant for corrections, the necessary actions bi-hourly, to adjust the clinker LSF, could be by changes in proportion of high ash coal + coal Petcoke mix in calciner or it could be even be targeting an appropriate kiln deed composition to accommodate the ash percentage of SAFR/RDF or bihourly changing the feed rate (TPH) of SAFR, as per the bi-hourly clinker composition requirements.
- Reducing conditions can have substantial effects on clinker quality like problems with sulfur integration, Alite decomposition (strength reduction), conversion from C4AF to C3A (acceleration of setting), change in color of cement (from greenish grey to brownish), the detection of reducing conditions could be done using ‘Magotteaux Test’, it is important to assess the reducing conditions whether internal or peripheral, would indicate possible reasons.
- Internal reducing conditions indicate that due to changes in liquid viscosity the larger clinker nodules are black from outside but yellow to brownish in the internal core. Such clinker nodules roll down from the transition zone with an unburnt core which disintegrates on cooling due to gamma C2S. Such nodules have high free lime, delocalised or peripheral reducing conditions due to larger size of solid AFR component (shredded size) showing CO peaks.
- The Hot meal (2Cl+SO3) needs to be reliably monitored using XRF standards of Hot Meal. Every plant would have a threshold value of (2Cl+SO3), value >3.5 is reported to cause severe depositions at kiln inlet/riser duct/cyclones.
- The kiln system should be able to handle the higher gas volumes (calciner , inlet and preheater).
Increased percentage of AFR /TSR is associated with increase in limestone pile LSF which is linked to life of mines (Fig:2). This increase in limestone pile LSF would be more plant specific. - To lessen the impact on limestone Pile LSF/Mines life the plant would have to use, sweetener limestone (availability/cost), reduce the percentage use of high silica correctives with purer correctives, use petcoke or low ash coal (imported), use of waste lime sludges available from chemical industries.
- As discussed earlier the plant could use a mix fuel (petcoke + high ash coal), or (mix of petcoke + high ash wastes like Dolochar/spent carbon etc.) in the calciner, the mix ratio could be changed so as to improve clinker LSF during the day (as a bi-hourly actions).
High ash (high iron/high silica) wastes should not be fired through the kiln fuel; these wastes should be put through calciner fuel if feasible or along with solid wastes. It is always beneficial to have low ash coal (fuel) / petcoke in kilns. - It is recommended to use 4 per cent to 5 per cent high LSF Limestone in petcoke grinding (especially for kiln fuel). It improves the efficiency of petcoke grinding and would help to bind the sulphur during combustion in kiln, thus decreasing the SO3 of the hot meal. Using limestone decreases the SO3 fluctuations in the clinker and the excess of CaCO3 forms C3S clusters in the clinker, thus, improving clinker grindability.
- Petcoke grinding is usually controlled at 1 per cent to 2 per cent on 90 microns. However in certain grinding systems, the 45 microns residue is observed to be as high as 26 per cent to 28 per cent which could create reducing conditions and initiate some coating formation in pre pre-transition zone in kilns.
- Large storage yards to stock different types of solid AFR would help to mix the waste in certain proportions so as to achieve relative consistency in ash percentage or even chloride contents.
- An auto-sampler with shredder on the solid AFR conveyor would be useful. However, the analysis time would be around 4 to 5 hours which is too high.
- If the plant is reaching >25 per cent TSR, from a futuristics angle, having an online Cross Belt analyser like ‘Spectra Flow’ could help analyse moisture percentage, ash percentage and its constituents in real time, enabling rapid corrections to clinker compositions with necessary modifications to the kiln system even much higher TSR levels could be achievable.
- Higher TSR levels invariably are associated with increase in Hot meal alkalis, chlorides and sulphates and would necessitate chloride bypass.
- The procurement has a high responsibility of providing appropriate SAFR/RDF fuel of different ash percentage and of different chloride percentage (screened to remove sand/mud/stones).
- Wastes having CaO rich ash would always be advantageous for the same TPH of solid AFR, the TSR percentage would be higher if the NCY of the sold AFR is higher.
Conclusion
The paper indicates and discusses in some details the avenues for increased TSR percentage without affecting clinker quality. However, depending on calciner retention time and air volume availability there would be a certain maximum TSR percentage that can be achieved. It may be noted here that the kiln system would necessitate suitable upgradation for achieving a much higher TSR percentage. It is needless to mention that XRF Models with standardless software for elemental analysis of solid/liquid AFR would be advantageous and as discussed having an XRD would be a necessity to maintain clinker quality at higher TSR percentage.
Clinkers with High MgO (>4.5 per cent) would be a challenge and optimising the CaO/SiO2 ratio would be a key to improve clinker quality use of XRD in such clinkers would be an asset.
Futuristically, ‘Torrefaction Process’ (the process of degrading organic materials in a nitrogen or inert environment within a temperature range of 200oC to 300oC) of bio wastes if extended suitably to MSW wastes and other solid AFR to produce a bio coal, could become an excellent opportunity for increased TSR for cement plants.
In this paper I have tried to share some observations in a generalised manner made at different plants with different AFR/TSR percentage which could be useful for other plants for their future road map on maximising TSR percentage.
About the author:
Shreesh Khadilkar, Consultant and Advisor brings over 37 years of experience in cement manufacturing, having held leadership roles in R&D and product development at ACC Ltd. With deep expertise in innovative cement concepts, he is dedicated to sharing his knowledge and improving the performance of cement plants globally.




Concrete
ABB Extends Drive Lifespan at ACC Cement Plant Without Production Shutdown
Published
5 hours agoon
November 12, 2026By
admin
ABB reconditions 25 drives at ACC’s Jamul cement plant, avoiding 16 tonnes of CO₂ emissions while improving reliability through predictive maintenance.
Chhattisgarh
ABB has signed a multi-year Motion OneCare service agreement with ACC Limited, part of the Adani Group, to modernise ageing industrial drives at its Jamul cement plant in Chhattisgarh, improving operational reliability while avoiding approximately 16 tonnes of carbon dioxide (CO₂) emissions without disrupting production.
Announced on 27 October 2026, the agreement combines scheduled drive reconditioning, digital condition monitoring and energy appraisals to extend equipment lifespan, improve plant uptime and optimise maintenance costs. The initiative marks a shift from conventional equipment replacement towards a more resource-efficient approach to industrial asset management.
The first phase, completed in April 2026, involved the on-site reconditioning of 25 ABB ACS800 variable speed drives without a major plant shutdown. By retaining the existing cabinets and restoring the drive modules rather than replacing entire panels, ABB helped ACC preserve capital investment, minimise material consumption and avoid approximately 16 tonnes of CO₂ emissions.
A second phase, covering an additional 25 ACS800 drive modules, is scheduled for the fourth quarter of 2026. The programme is designed to improve long-term equipment reliability while allowing maintenance activities to be aligned with the plant’s operational schedules.
The ACS800 drives, installed at Jamul in 2010, had delivered more than a decade of near-continuous service in demanding cement manufacturing conditions. However, ageing electrical components and changing fault patterns had begun to affect their ability to meet the plant’s reliability requirements.
Rather than opting for complete equipment replacement, ACC engaged ABB’s certified engineers to conduct a comprehensive asset health assessment. The evaluation found that the existing cabinets and enclosures remained structurally sound, making targeted reconditioning a technically viable and cost-effective alternative to full replacement.
Drawing on nearly two decades of experience with ACC’s equipment and operating requirements, ABB developed a maintenance framework tailored to the plant’s shutdown windows, budget cycles and production priorities.
The Motion OneCare agreement incorporates planned equipment restoration, condition-based monitoring and energy assessments, enabling ACC to adopt a more systematic approach to maintaining critical electrical infrastructure.
As part of the programme, ACC has implemented ABB Ability™ Digital Powertrain Insights to monitor drive performance and identify emerging operational issues before they result in equipment failures.
The digital platform provides continuous visibility into parameters such as temperature, current, vibration and fault patterns. These insights allow maintenance teams to detect early signs of equipment deterioration, schedule interventions more effectively and reduce the likelihood of unexpected downtime.
Amit Gupta, Local Division Manager, Motion Services, ABB India, said: “We know what unchecked wear costs over time: a small inefficiency that eats away at ROI for years. At Jamul, the evidence pointed clearly to assets with productive life still in them.”
“Our job was to restore them properly and give the team the tools to stay ahead of the next problem. At ABB, we don’t just fix what fails. We want to protect what works.”
The initiative also demonstrates the growing relevance of circular economy principles in cement manufacturing, where extending the service life of existing industrial equipment can reduce capital expenditure, material consumption and the environmental impact associated with manufacturing replacement components.
According to ABB, drive reconditioning can reduce lifecycle emissions by 50 to 80 per cent compared with complete equipment replacement. By preserving functional components and restoring critical modules, the process helps retain the economic and material value of existing industrial assets.
The addition of energy appraisals in subsequent phases will further expand the programme beyond equipment restoration, enabling ACC to assess drive performance, identify energy-saving opportunities and improve operating efficiency.
For cement manufacturers, variable speed drives play an important role in controlling motors and optimising energy consumption across production processes. Maintaining their reliability and efficiency is essential for minimising operational disruptions and managing electricity costs.
Vinod Bahety, CEO – Cement Business, Adani Group, said: “Moving from reactive firefighting to a structured maintenance plan was exactly what this operation needed. That kind of peace of mind doesn’t come easily. It comes from a partner that understands how your business runs.”
“We didn’t need a full system overhaul; we needed expert support, actionable insights, and a plan we could execute around our schedule. That’s what we got.”
The project supports ACC’s broader strategy to improve manufacturing efficiency through digital transformation, preventive maintenance and sustainable asset management.
ACC, a subsidiary of Ambuja Cements and part of the Adani Group, operates 20 cement manufacturing facilities and 119 ready-mix concrete plants across India. The company has been advancing initiatives focused on renewable energy, circular economy practices and technology-driven operational improvements.
Alongside Ambuja Cements, ACC is part of a large-scale building materials business committed to achieving net-zero emissions by 2050, with near-term and net-zero targets validated by the Science Based Targets initiative (SBTi).
The Jamul initiative aligns with these sustainability objectives by demonstrating how equipment life extension and digital monitoring can contribute to resource efficiency without requiring large-scale replacement of existing infrastructure.
ABB, a global technology company specialising in electrification and automation, brings more than 140 years of industrial expertise and employs approximately 110,000 people worldwide. Its Motion Services business supports industrial customers through equipment maintenance, modernisation, digital monitoring and lifecycle management solutions.
The agreement also reflects a wider shift in industrial maintenance practices, with manufacturers increasingly adopting predictive technologies to improve equipment availability, manage costs and reduce unplanned shutdowns.
With 25 drives already reconditioned and another 25 scheduled for restoration, ABB’s collaboration with ACC illustrates how targeted modernisation, digital monitoring and circular maintenance practices can extend the operational life of critical equipment while supporting more efficient and sustainable cement production.
Concrete
ABB Drives Digital Transformation at TCI MAX Cement Plant in J&K
Published
5 hours agoon
November 12, 2026By
admin
ABB deploys advanced process control at TCI MAX’s Srinagar cement plant to improve clinker quality, energy efficiency and sustainable manufacturing.
Kashmir
ABB has deployed its advanced process control technology at TCI MAX Cement’s Srinagar facility in Jammu and Kashmir, marking the region’s first reported implementation of advanced process control (APC) in cement manufacturing and strengthening efforts towards more efficient, digitally enabled production.
Announced on 5 November 2026, the deployment of ABB Ability™ Expert Optimizer at the facility, operated by Trumboo Industries Pvt. Ltd., aims to improve process stability, clinker quality, energy efficiency and overall plant productivity. The implementation forms part of TCI MAX’s strategy to modernise its manufacturing operations through automation and digital technologies.
Following the integration of ABB’s advanced process control solution and supporting IT infrastructure, TCI MAX has reported improvements in operational productivity, product quality and sustainability-related performance indicators. The technology focuses on optimising the cement pyro process, a critical stage of production involving high-temperature processing and clinker formation.
Waseem Ahmed Trumboo, Director, Trumboo Industries Pvt. Ltd., said: “Introducing advanced process control at TCI MAX is an important step in how we are evolving our operations. Our focus is on improving the stability and efficiency of our processes while maintaining consistent clinker quality. We have been encouraged by the performance of the solution during commissioning and by the support from the ABB team, and we look forward to realizing its full potential.”
ABB Ability™ Expert Optimizer combines advanced process control, model predictive control (MPC) and artificial intelligence (AI) to continuously monitor and optimise manufacturing operations. By analysing process conditions, predicting operational behaviour and automatically adjusting key parameters, the system enables more consistent production while reducing process variability.
In cement manufacturing, maintaining stable pyro-processing conditions is essential for achieving uniform clinker quality and optimising thermal energy consumption. Fluctuations in operating parameters can affect fuel efficiency, production output and product consistency.
The deployment is designed to address these challenges through real-time process optimisation, helping operators maintain more stable kiln operations while improving the utilisation of fuel, electricity and raw materials.
Kapil Agarwal, Senior Vice President and Local Division Manager, Process Industries Division, ABB India, said: “Cement producers are increasingly looking to adopt digital technologies to achieve greater consistency and efficiency while addressing their sustainability priorities. ABB Ability™ Expert Optimizer brings advanced process control and deep cement process expertise together to help operators make their processes more stable and efficient. We are pleased to support TCI MAX as it takes this important step in its digital transformation.”
The technology also supports sustainability objectives by optimising fuel consumption, improving electrical energy efficiency and minimising process waste. More stable operations can contribute to lower energy intensity and reduced emissions associated with cement production.
For TCI MAX, the investment represents a move towards data-driven manufacturing, where automated control systems complement operator expertise to improve production performance and operational reliability.
The implementation is particularly significant for Jammu and Kashmir’s cement industry, as it introduces advanced process optimisation technology to a regional manufacturing facility. Its deployment could demonstrate the potential for wider adoption of digital automation across cement plants seeking to modernise their operations.
The project builds on ABB’s experience in delivering advanced process control solutions to cement manufacturers worldwide. Through the integration of industrial automation, predictive technologies and process engineering expertise, the company supports manufacturers in improving resource efficiency and maintaining consistent production quality.
As cement producers face increasing pressure to manage energy costs, improve productivity and reduce their environmental footprint, technologies such as AI-enabled process control and predictive optimisation are becoming important components of plant modernisation strategies.
ABB’s Expert Optimizer provides a platform for addressing these priorities by enabling automated adjustments based on changing process conditions, reducing reliance on manual intervention and supporting more efficient plant operation.
ABB, a global technology company specialising in electrification and automation, has more than 140 years of industrial experience and approximately 110,000 employees worldwide. Its Automation business employs around 26,000 people and provides technologies and services across process, hybrid and maritime industries.
The TCI MAX deployment reinforces ABB’s growing role in the digital transformation of cement manufacturing in India, where improving process efficiency and reducing energy consumption remain critical to the industry’s long-term sustainability.
With the advanced process control system now implemented at its Srinagar facility, TCI MAX aims to build on the initial operational improvements and further optimise production efficiency, clinker consistency and environmental performance.
Concrete
Ramco Cements’ Hard Worker Wins Eight Awards at ‘Love of Advertising Awards 2026’
Published
6 hours agoon
November 12, 2026By
admin
Ramco Cements’ Hard Worker brand wins eight awards for excellence in advertising, packaging and brand identity at the Love of Advertising Awards 2026.
Hyderabad
The Ramco Cements Limited’s construction chemicals brand, Hard Worker, has secured eight awards at the Love of Advertising Awards 2026, recognising its creative excellence across television, digital advertising, packaging design and brand identity.
Organised by the Advertising Club of Trivandrum, the awards were presented at a ceremony held at The Leela Raviz, Kovalam, on 24 October 2026. The recognition highlights Hard Worker’s integrated marketing strategy and its efforts to establish a distinctive presence in India’s competitive construction chemicals market.
The eight awards span multiple creative categories, reflecting the brand’s approach to combining product-focused communication with engaging storytelling, humour and innovative design. Through its campaigns, Hard Worker has sought to simplify technical product benefits and make construction chemicals more accessible and relatable to consumers and construction professionals.
Built around the philosophy of “Hard-working products for hardworking people”, the brand focuses on communicating practical product advantages through memorable advertising narratives while maintaining a consistent identity across different marketing platforms.
Its campaigns for Ramco Hard Worker Eco Plaster and Tile Fix have been central to this approach. The Eco Plaster campaign highlights water conservation through the product’s self-curing properties, positioning it as a solution that supports more efficient construction practices. Meanwhile, Tile Fix promotes specialised tile-fixing solutions by presenting their practical benefits through relatable situations and creative storytelling.
Beyond advertising, Hard Worker has invested in distinctive packaging and brand identity development to improve product recognition and maintain consistency across customer touchpoints. This integrated approach has helped the brand differentiate itself in a category where marketing communication has traditionally focused on technical specifications and functional performance.
A V Dharmakrishnan, CEO, Ramco Cements, said, “Winning eight awards at the Love of Advertising Awards is a proud moment for Ramco Cements and the Hard Worker team. We believe that building a strong brand requires not only quality products but also the ability to communicate their value in a compelling and differentiated manner. Hard Worker’s journey reflects our commitment to combining product performance with innovative marketing to create meaningful connections with our customers and strengthen our presence in the construction chemicals market.”
The recognition comes as building materials manufacturers increasingly focus on brand differentiation, product awareness and customer engagement to strengthen their position in the construction chemicals segment.
By using humour and storytelling to explain product applications and benefits, Hard Worker aims to bridge the communication gap between technical construction solutions and the practical requirements of contractors, applicators and end-users.
Balaji K. Moorthy, Executive Director – Marketing, Ramco Cements, said, “Hard Worker was conceived to bring a fresh perspective to the construction chemicals category, where product communication has traditionally been functional and technical. Our endeavour has been to break through the clutter with distinctive ideas, humour and storytelling, while keeping the product proposition at the heart of every campaign. The recognition across TV and digital advertising, packaging design and brand identity design demonstrates our integrated approach to building the brand. These eight awards are an encouraging recognition of the creative thinking and collaborative effort behind Hard Worker’s marketing initiatives.”
The awards add to Hard Worker’s growing portfolio of creative recognitions and reinforce Ramco Cements’ emphasis on integrating product innovation with strategic marketing.
The brand’s communication initiatives also reflect a wider shift in the construction materials industry, where manufacturers are increasingly adopting consumer-focused marketing strategies to improve product understanding and strengthen relationships with construction professionals.
With its portfolio of construction chemicals, Hard Worker aims to address evolving requirements for durability, application efficiency and construction quality. Its marketing efforts seek to complement these product attributes by building stronger awareness and encouraging the adoption of specialised construction solutions.
Ramco Cements, one of India’s established cement manufacturers, operates across cement and allied building solutions. Through Hard Worker, the company is expanding its presence in the construction chemicals segment with products designed to enhance performance, quality and durability in modern construction applications.
The latest recognition strengthens Hard Worker’s brand visibility and underscores the growing importance of creative communication in promoting technical building materials. Ramco Cements intends to continue combining product development with distinctive marketing initiatives to support the brand’s growth in India’s construction chemicals market.
ABB Extends Drive Lifespan at ACC Cement Plant Without Production Shutdown
ABB Drives Digital Transformation at TCI MAX Cement Plant in J&K
Ramco Cements’ Hard Worker Wins Eight Awards at ‘Love of Advertising Awards 2026’
Shree Cement Expands Bangur Concrete Network with Patna Plant
Ambuja Plans 2.9 MTPA Godda Cement Unit
ABB Extends Drive Lifespan at ACC Cement Plant Without Production Shutdown
ABB Drives Digital Transformation at TCI MAX Cement Plant in J&K
Ramco Cements’ Hard Worker Wins Eight Awards at ‘Love of Advertising Awards 2026’
Shree Cement Expands Bangur Concrete Network with Patna Plant
Ambuja Plans 2.9 MTPA Godda Cement Unit
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