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Magnesia-spinel bricks are raising the bar

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India’s cement sector is in the midst of a structural growth phase. Performance of every production asset carries greater commercial consequence than before.

Total installed capacity of cement reached approximately 690 million tonnes per year by early 2026, with production touching 453 million tonnes in 2025 — a 6.3% year-on-year increase. According to CRISIL Ratings, Indian cement producers are expected to invest nearly ?1.2 lakh crore in capacity expansion between 2026 and 2028, with 160–170 million tonnes of new grinding capacity forecast to come online. Demand is projected to rise from 445 MMT in 2024 to 670 MMT by 2030, underpinned by government infrastructure programmes, affordable housing schemes and rapid urbanisation.
Among the most critical assets of a cement plant is the refractory lining of the rotary kiln. In the burning zone, where temperatures regularly exceed 1,450°C, the right choice of brick can mean longer campaigns, reduced maintenance cycles, and more consistent output.

Rotary kiln: A demanding environment
The rotary kiln is the core thermal unit in cement clinker production. Raw meal enters at one end at a few hundred degrees Celsius and is progressively heated to around 1,450°C at the burning zone, where clinker nodules form. The steel kiln shell must be continuously protected from this extreme environment, which is the job of the refractory lining.
Refractory bricks serve multiple simultaneous functions: insulating the shell from heat, resisting chemical erosion from clinker melt, alkali vapours, sulphur compounds and chlorine, and withstanding the mechanical stresses of a continuously
rotating system.

CALDE® MAG bricks: Engineered for critical zones
Calderys’ CALDE® MAG bricks range comprises a family of magnesia-spinel bricks engineered specifically for the transition and burning zones of cement and lime rotary kilns.
The bricks are made from a blend of high-purity magnesia (MgO) and active spinel, a crystalline compound formed from magnesia and alumina, which offers thermochemical stability, mechanical toughness, and controlled coating behaviour. The range features low thermal conductivity and controlled expansion.

Why brick quality matters commercially
The economic argument for high-quality refractory bricks is often underweighted when procurement decisions are driven by initial unit cost. For a cement plant operating at the scale typical of India’s major producers, an unplanned kiln outage carries significant costs: lost production, fuel to bring the kiln back to temperature, relining labour, and potential mechanical damage to the shell.
Many plants increasingly use alternative fuels and locally sourced raw materials, which can alter the alkali-sulphur balance within the kiln atmosphere and accelerate lining corrosion. Magnesia-spinel bricks of the hercynite type address this directly, with reduced alumina content limiting the formation of low-melting calcium aluminates that would otherwise compromise brick integrity.

Local manufacturing as a strategic advantage
A brick ordered from an overseas supplier may meet technical specifications on paper, but a six-to-eight-week lead time following an unplanned outage becomes part of the total cost of failure. Local manufacture provides shorter lead times, ready inventory of fast-moving grades, and faster emergency response.
Bricks manufactured and tested in India, against data from Indian kiln operations, can be more precisely calibrated to local raw material chemistry, fuel types, and operating practices. Looking ahead, Calderys is expanding its Indian footprint through the CAPES facility in Odisha — a new plant housing multiple production lines for both monolithic refractories and shaped bricks, strategically located within one of India’s most active industrial belts.

Sources: IBEF Cement Industry Report; Mordor Intelligence India Cement Market; CRISIL/S&P Global, November 2025; CemNet, November 2025; calderys.com

(Communication by the management of the company)

Concrete

Cement Makers Reaffirm Commitment to Sustainable Growth

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World Environment Day spotlight on innovation and circularity

On World Environment Day, the Indian cement industry reiterated its commitment to supporting India’s climate ambitions through sustainable manufacturing, resource efficiency and the adoption of cleaner technologies.

The Cement Manufacturers’ Association (CMA) said the sector remains aligned with the Government of India’s Net Zero commitments and is accelerating efforts to reduce its environmental footprint while supporting the country’s infrastructure and development agenda.

Parth Jindal, President, CMA and Managing Director, JSW Cement, said the industry is increasingly adopting cleaner technologies, improving energy efficiency and expanding the use of alternative fuels and raw materials. He also highlighted the growing importance of circular economy practices, where industrial by-products and waste streams from one sector are utilised as resources in another.

“The Indian Cement Industry is aligned to the Government’s commitments on carbon mitigation and is accelerating the adoption of cleaner technologies, resource efficiency and circular economy practices while actively exploring the potential of Carbon Capture, Utilisation and Storage (CCUS) as a critical pathway for deep decarbonisation,” said Jindal.

He added that coprocessing industrial waste and by-products helps conserve natural resources, reduce disposal requirements and lower the environmental footprint across multiple sectors.

According to Jindal, sustainability is no longer limited to manufacturing processes but is increasingly influencing investment decisions, innovation strategies and long-term growth plans within the industry.

Echoing similar views, Dr Raghavpat Singhania, Vice President, CMA and Managing Director, JK Cement, said sustainable development extends beyond emissions reduction and must also focus on responsible resource utilisation and waste minimisation.

“Sustainability in the built environment cannot be measured by emissions alone. It is equally about how efficiently we use resources, how effectively we minimise waste and how responsibly we create the infrastructure that will serve future generations,” said Singhania.

He noted that the cement industry is advancing its sustainability agenda through greater resource efficiency, increased circularity, technological innovation and continuous improvements in manufacturing practices. As a key contributor to India’s infrastructure development, the sector has a critical role to play in balancing economic growth with environmental responsibility.

On the occasion of World Environment Day, industry leaders reaffirmed their commitment to supporting India’s climate goals while delivering the materials required for resilient, durable and sustainable infrastructure.

 

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Concrete

Building a Greener Future Together

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Environmental sustainability requires immediate action, not just long-term commitments and discussions. Recycling, circular economy practices, and technology-driven waste management can help industries reduce environmental impact while supporting sustainable growth.

Author: Jignesh Kundaria, Director and CEO, Fornnax Technology

World Environment Day serves as an important reminder that environmental sustainability can no longer remain confined to discussions, reports, or long-term commitments. The environmental challenges facing the world today demand immediate, measurable, and collective action. Across industries and communities, waste generation continues to outpace our ability to process it responsibly, placing increasing pressure on ecosystems, natural resources, public health, and the well-being of future generations.

One of the most significant shifts required today is a change in how society perceives waste. Rather than being viewed as a material to be discarded, waste must be recognised as a valuable resource that can contribute to both economic growth and environmental protection when managed through the right technologies and systems. This mindset forms the foundation of the circular economy model that countries across the world are increasingly adopting to reduce landfill dependence, recover valuable materials, and create more sustainable industrial ecosystems.

India has made meaningful progress in strengthening awareness around sustainability, recycling, and environmental responsibility over the past decade. Significant efforts are being made to formalise the recycling sector through improved infrastructure, technology adoption, policy implementation, and broader stakeholder participation. These developments are creating a stronger foundation for responsible waste management and resource recovery across the country.

However, achieving long-term environmental impact requires collaboration from all stakeholders. Industries, policymakers, technology providers, and communities must work together with greater accountability to strengthen recycling ecosystems, encourage responsible waste management practices, and create sustainable outcomes through consistent execution rather than temporary interventions.

As someone closely associated with the recycling industry, I firmly believe that technology will play a decisive role in addressing future environmental challenges. Advanced recycling systems have the potential to recover valuable resources, reduce pollution, minimise landfill burdens, and conserve energy, creating a more sustainable future for generations to come. This belief is deeply reflected in Fornnax’s motto, “Committed to Create a Green Future,” which embodies our commitment to building long-term environmental value through innovation and responsible action.

At the same time, technology alone cannot deliver meaningful change. Real progress requires intent, awareness, participation, and a shared sense of responsibility. Sustainable development can only be achieved when innovation is supported by collective action and a genuine commitment to environmental stewardship.

On this World Environment Day, let us move beyond conversations and take meaningful steps towards creating a cleaner, greener, and more sustainable planet. By embracing innovation, strengthening recycling ecosystems, and acting responsibly today, we can create lasting environmental impact and secure a better future for generations to come.

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Concrete

JK Lakshmi Advances LC3 Cement Expansion

Company highlights commercial production and research partnerships

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The meeting reviewed progress in limestone calcined clay cement (LC3) technology and its commercial adoption in India’s cement sector, focusing on low-carbon alternatives to conventional binders. JK Lakshmi Cement noted that limestone calcined clay cement can reduce carbon dioxide emissions by up to 40 per cent compared with conventional cement and said this reduction supports industry decarbonisation. The company highlighted that it was among the first two cement manufacturers in India to move LC3 into commercial production after the Bureau of Indian Standards approved the technology as a cement standard.

Vinita Singhania said the transition of LC3 from research to commercial production reflected collaboration between industry, academia and international institutions. Maya Tissafi acknowledged JK Lakshmi Cement’s role in advancing LC3 adoption in India and its contribution in taking the technology from laboratory trials to commercial implementation. Both representatives underlined the growing relevance of sustainable construction materials as India expands infrastructure and urban development.

The meeting explored continued collaboration with Swiss research institutions such as EPFL, EMPA and ETH Zurich alongside Indian academic partners and development organisations. JK Lakshmi Cement has been associated with the LC3 initiative since 2014 and worked with EPFL, IIT Delhi, IIT Madras, Development Alternatives and Technology and Action for Rural Advancement. The company conducted one of the earliest industrial trials of LC3 and recently announced commercial production of Green Pro LC3 cement from its Jaykaypuram plant in Rajasthan.

India remains the world’s second-largest cement producer and expansion of infrastructure, urbanisation and housing demand continue to support long-term sector growth, increasing interest in low-carbon technologies. The company reported an annual turnover of more than Rupees (Rs) 60 bn and current cement capacity of about 18 million (mn) tonnes (t) per annum, with a target of reaching 30 million (mn) tonnes (t) by 2030. Apart from grey cement, the company also makes ready-mix concrete, gypsum plaster, wall putty, primers, adhesives and fly ash blocks, and both sides concluded on the need for continued collaboration to develop sustainable construction solutions.

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