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Indian Cement Industry Powers Green Transformation

Indian Cement Industry Powers Green Transformation

The Indian cement industry, the second largest globally, has embarked on a transformative journey that not only addresses the nation’s infrastructure needs but also actively contributes to sustainability goals. With an installed capacity of around 670 million tonnes per annum and a cement production output of 430 million tonnes in 2023-24, India’s cement sector is critical to its economic growth. However, the industry has set ambitious targets, aligning with the government’s vision of achieving Net Zero carbon emissions by 2070, underscoring its role in driving positive environmental change.

As one of the largest contributors to global greenhouse gas emissions, the cement industry is under increasing pressure to innovate and adopt more sustainable practices. This transformation goes beyond mere technological upgrades—it involves a fundamental shift in business models and processes. The traditional “take-make-dispose” model is being replaced with the regenerative principles of a circular economy, which emphasise recycling, material reuse, and waste reduction. This paradigm shift is pivotal not only for cement manufacturing but also for the broader industrial landscape. A key example of this transition is the industry’s efforts to improve energy efficiency and reduce carbon emissions. The thermal substitution rate in cement plants has already reached 7 percent, a sign of progress. Green hydrogen is being explored as a viable alternative to coal and natural gas in cement kilns.

While still in its early stages, the potential of green hydrogen to revolutionise cement production is immense, requiring further research and development to bring it into mainstream use. Blended cements, made using alternative raw materials like fly ash from thermal plants, slag from ferrous and non-ferrous industries, and waste from paper and mineral processing, have gained prominence. These sustainable practices reduce dependence on virgin resources and promote a circular economy. However, the industry has yet to fully tap into other waste streams, such as red mud from aluminium production and gypsum from thermal and fertiliser industries. A comprehensive national inventory of industrial by-products could unlock new opportunities for sustainable waste management and enhance the sector’s resource efficiency.

The cement industry has also made significant strides in energy conservation by adopting advanced kiln systems that optimise energy use. Furthermore, renewable energy adoption and the implementation of waste heat recovery systems (WHRS) are helping reduce the sector’s carbon footprint. WHRS captures waste heat generated during cement production and converts it into usable energy, further improving sustainability and reducing energy costs. Kiln electrification is an emerging concept with transformative potential. This innovative technology could drastically cut CO2 emissions by replacing fossil fuels with electricity derived from renewable sources. By achieving the extreme temperatures required for clinker production using renewable electricity, kiln electrification could address the 40% of emissions linked to thermal processes. However, challenges related to high infrastructure costs and intermittent renewable energy supply need to be overcome. Advanced energy storage solutions will play a crucial role in making kiln electrification a scalable solution.

Another important technology in the fight against cement-related emissions is Carbon Capture, Utilisation, and Storage (CCUS). While still in the development phase, CCUS could significantly mitigate the remaining 60% of emissions generated by clinker production. Government incentives, regulatory support, and investments in CCUS infrastructure will be essential to accelerate its adoption and bring about large-scale environmental benefits. Beyond production, logistics costs—accounting for nearly 30% of the total manufacturing expenses in cement—are also undergoing a shift. The industry is exploring environmentally friendly transport solutions, including CNG/LNG-powered trucks and electric vehicles, alongside an increased use of railways and waterways to reduce reliance on road transport.

The sustainability shift in the Indian cement industry highlights the sector’s ability to adapt and lead the way in achieving a greener, more resource-efficient future. As global expectations evolve, driven by government regulations and growing consumer demand, cement manufacturers are focusing on innovation, technological advancements, and the integration of renewable energy to meet sustainability goals. The road ahead is challenging, yet India’s cement industry stands at the forefront of driving positive change through greener manufacturing practices, energy-efficient technologies, and circular economy principles. By embracing these changes, the industry is setting the stage for a future where economic growth and environmental stewardship go hand in hand.

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