Use of AFR In Cement Manufacturing Process - A Case Study of Dalmia Cement Bharat Limited Rajgangpur

The cement industry is one of the largest contributors to global CO₂ emissions, primarily due to its energy-intensive production processes and reliance on fossil fuels. As sustainability concerns intensify, the integration of Alternative Fuels and Raw Materials (AFR) has emerged as a viable strategy to reduce environmental impact, lower production costs, and promote circular economy principles. AFR encompasses a wide range of materials, including waste- derived fuels, biomass, used tires, plastics, and industrial by-products such as fly ash and slag, which can partially replace conventional fossil fuels in cement kilns. Extensive research indicates that incorporating AFR can significantly lower CO₂ emissions by reducing the clinker factor and substituting non-renewable resources. Additionally, the co-processing of industrial and municipal waste in cement kilns provides an effective waste management solution while conserving natural resources. Despite these advantages, challenges such as fuel variability, emissions control, material handling complexities, and regulatory compliance must be addressed to optimize AFR utilization. Advanced technological solutions, stringent monitoring systems, and policy frameworks are essential for ensuring the safe and efficient adoption of AFR in cement manufacturing. India, the second-largest cement producer globally, is responsible for approximately 7% of the country’s total CO₂ emissions. The Indian cement industry currently operates at an average Thermal Substitution Rate (TSR) of 2.5%, indicating significant potential for increasing AFR utilization. To achieve the targeted 5% TSR by 2020 and 20% TSR by 2030, an estimated 7,000 tonnes and 25,000 tonnes of alternative fuels must be co-processed per million tonnes of cement produced, respectively. To facilitate this transition, Indian cement manufacturers are investing in pre-processing infrastructure, advanced kiln technologies, and policy-driven initiatives to enhance AFR adoption. This thesis provides a comprehensive review of recent advancements, global best practices, case studies, and future prospects for integrating AFR in cement manufacturing. It explores innovative strategies for increasing TSR, overcoming operational challenges, and ensuring regulatory compliance while maintaining product quality and process efficiency. The findings highlight the crucial role of AFR in driving the cement industry toward a low-carbon, resource-efficient, and environmentally sustainable future.