Heidelberg Materials Commissions New Kiln Line at Airvault Plant

Why It Matters

The project showcases a large‑scale decarbonisation effort in cement, improving cost competitiveness while meeting tightening ESG and regulatory demands across Europe.

Key Takeaways

• New kiln line adds 1.25 Mta clinker capacity.
• €350 m (~$380 m) upgrade targets 30% CO₂ cut.
• Up to 90% energy from alternative fuels.
• Electricity use per tonne down ~10%.
• Supports 1 Mta CO₂ capture via Airvault GOCO₂.

Pulse Analysis

The cement sector accounts for roughly 8% of global CO₂ emissions, prompting manufacturers to seek technology that can slash its carbon intensity. Heidelberg Materials’ latest investment in Airvault replaces aging semi‑dry equipment with a state‑of‑the‑art dry‑process kiln, a configuration that extracts more heat from the raw mix and reduces fuel consumption. By integrating a pre‑calciner, the plant can achieve higher clinker throughput while maintaining tighter control over kiln temperature, a key factor in cutting both energy use and emissions.

Beyond the kiln, the €350 million overhaul emphasizes alternative fuels, allowing up to 90% of the plant’s heat to come from waste-derived or biomass sources. This shift not only curtails reliance on coal and natural gas but also drives a roughly 10% reduction in electricity per tonne of cement. The lower clinker factor, achieved by blending calcined clay, supports the launch of the low‑carbon “Q cement” portfolio, positioning Heidelberg to meet growing demand for greener building materials in Europe’s construction market.

The Airvault GOCO₂ initiative adds a forward‑looking carbon‑capture layer, targeting about 1 million tonnes of CO₂ removal each year. Coupled with the plant’s emissions cuts, the project illustrates how integrated decarbonisation—spanning process efficiency, fuel substitution, material innovation, and capture technology—can deliver both environmental and economic benefits. As EU climate policies tighten, such comprehensive upgrades are likely to become a benchmark for cement producers aiming to stay competitive while delivering on sustainability commitments.