Electric Arc Furnace (EAF)

Carmeuse offers a variety of lime-based products, including high calcium quicklime and dolomitic quicklime, and provides advanced lime handling and lime injection systems to meet the needs of EAF steelmakers.

Image
EAF - Carmeuse

What is Lime Injection for EAF?

Lime injection is a method of adding lime and dolime directly into the molten steel bath of an electric arc furnace (EAF) via a powerful pneumatic injector through the side-wall of the furnace.

Historically, steelmakers have used various methods for adding lime and dolime to the electric arc furnace (EAF), including scrap bucket discharge and fifth-hole addition through the roof (via conveyor belt). 

Lime injection systems are becoming increasingly popular as a more efficient means to transfer lime into molten steel. Maintaining a foamy slag in the EAF is essential but fundamentally challenging. Modern sidewall lime injection systems allow lime to be introduced into the EAF in a more controlled process, enabling slag foaminess throughout the heat cycle. Lime injection technology also provides a closed-loop environment, which enables nearly 100% of lime to be used in-process. This results in a cleaner and safer working environment with less dust in the air and on the shop floor, and a reduction in overall lime usage, which lowers your CO2 emissions. Other advantages of lime injection include better control of slag chemistry, energy savings, improved steel processing performance, and extended refractory life.

Lime Injection and Lime Handling Systems for EAF Steelmaking

An evaluation of your lime handling equipment is essential in ensuring lime is transferred from silo to furnace in the most effective and reliable way, as over time this will be impacted through normal wear and tear. From offloading and flow promotion to pneumatic conveying and lime injection, Carmeuse is committed to providing quality equipment solutions to EAF steelmakers to help optimize your operations.

Carmeuse supplies our advanced equipment solutions for lime storage, handling, and lime injection through our wholly owned subsidiary, Storage & Transfer Technologies (STT). Our expert engineers can design the right solution to keep your steelmaking operation running smoothly, from new lime handling or injection systems, to retrofits and upgrades for your existing equipment. Experienced technicians are also available for onsite diagnosis of current problem areas, recommendations for potential solutions, and help with system implementation and startup. For additional information related to our lime handling and lime injection expertise, visit the STT website.

View Our Solutions