eLCC – electrified Linear Calcination Conveyor

An innovative and energy efficient solution for the production of calcined clay

Building on more than two decades of expertise in conveying hot materials – including proven solutions like the KZB-S (up to 1,000°C), BZB-H-I (up to 850°C), and FPB-K (up to 850°C) – together with Holcim, AUMUND has developed the electrified Linear Calcination Conveyor, in short eLCC. The eLCC is a patented, energy-efficient solution for the production of calcined clay.

The eLCC technology addresses the critical challenge of clay calcination, which requires precise temperature control at 750-800 °C – significantly lower than traditional clinker production temperatures. This temperature reduction, combined with the eLCC‘s energyefficient design, contributes substantially to the overall carbon footprint reduction achieved by LC³ cement.

The cement industry faces unprecedented pressure to decarbonize, accounting for approximately 8% of global CO₂ emissions. LC³ (limestone calcined clay cement) presents a transformative opportunity to reduce emissions and unlock economic benefits within existing industry infrastructure. LC³ is a blend approximately 50% clinker (compared to 95 % in ordinary Portland cement), 30% calcined clay, 15% limestone, and 5% gypsum which reduces carbon emissions in the cement production process by up to 40% compared to ordinary Portland cement.

The synergy between calcined clay and limestone creates complex pozzolanic reactions, with calcined clay providing additional alumina that reacts with limestone to form carboaluminate phases, contributing significantly to strength and durability while maintaining comparable or superior performance characteristics to conventional cement.

Based on AUMUND‘s robust pan conveyor technology, the eLCC benefi ts from decades of fi eld-proven reliability. The
modular design architecture allows production capacities to be expanded seamlessly by adding additional modules, providing exceptional fl exibility for system expansion and long-term scalability as market demand for LC³ cement grows. The system off ers simplicity in operation while enabling fine-tuning through precise control of temperature and speed.

The eLCC‘s specifi c energy requirement is signifi cantly lower compared to alternative solutions due to its completely enclosed and insulated design. The compact heating chamber volume reduces heat losses substantially and enables rapid system startup, providing unprecedented operational fl exibility for plant operators. This design philosophy aligns with the cement industry‘s need for responsive, effi cient production systems.

While the eLCC can accommodate various heating systems including ceramic gas burners, its elecric heating elements can be powered entirely by renewable energy sources such as wind or solar power. This capability enables completely carbon-neutral calcination processes with zero direct CO2 emissions, thus representing a fully sustainable cement production technology approach.

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