Supporting your environmental performance
Meeting environmental standards requires reliable, high-efficiency treatment solutions. We support you in reducing emissions, improving raw material efficiency and advancing safer, more sustainable steel production.
Cost effective compliance with environmental legislation
As regulations become more stringent, we help you meet emission and treatment requirements efficiently and economically.
Our solutions support compliant operations in:
- Flue gas treatment
- Water treatment
- Steel by-product management and valorization
We help you turn compliance into value by enabling dust inertization and slag reuse in other applications.
Iron sludge deoiling
Stricter environmental regulations and rising raw material costs increase the importance of recovering iron from metallurgical residues. In partnership with Paul Wurth, we have developed a low-temperature pyrometallurgical deoiling process that recovers high-quality iron while integrating into existing steelmaking flowsheets.
Benefits for your operation:
- Easy integration into standard steelmaking processes
- No specific residue pretreatment required
- Adaptability to varying sludge compositions
- Production of high-quality deoiled iron oxide
- Material suitable for reuse in sinter plants
- No impact on other steelmaking processes
Flue gas treatment
Stricter limits on acid gases, dioxins, furans and heavy metals require treatment solutions that perform reliably and integrate smoothly into your existing systems. For dry sorption, our hydrated lime neutralizes SO₂ and other acid gases while helping reduce residue disposal costs. We also offer tailor-made lime blends combining lime with activated carbon, lignite coke or specialty minerals to capture micropollutants - without the drawbacks of pure activated carbon. For spray sorption and wet scrubbing, Sorbacal® reagents deliver reliable acid gas neutralization across a wide range of steelmaking applications.
Neutralization of acidic water
Our milk of lime neutralizes acidic water from pickling, rinsing and flue gas scrubbing operations. It enables stable pH control and effective heavy metal precipitation. After sedimentation, treated water can be recycled into your process or safely discharged - supporting efficient and compliant water management.
Sludge stabilization
Effective sludge management is essential for smooth and compliant operations. Milk of lime improves sludge filterability, enhancing downstream filtration performance. Quicklime conditioning produces filter cakes and centrifuge sludge that are easier to handle and dispose of. In converter flue gas cleaning, lime treatment enables recovery of iron-rich material for reuse in steelmaking. When recycling is not feasible, milled quicklime supports safe drying and solidification, simplifying handling, transport and storage.
Your partner for high-performance and sustainable steelmaking
Calexor® and Flucal® solutions help you improve productivity while meeting environmental and regulatory requirements.
At Lhoist, we go beyond supplying products. We bring:
- High-performance lime, dolime and mineral solutions
- Deep steelmaking process expertise
- On-site technical support
- Reliable logistics and a strong local presence
Your partner for high-performance and sustainable steelmaking
