Initial situation:

Fine-grained process residues (eg filter dust or dried sludge) often contain considerable amounts of metals, alloying components and carbon. By injection these valuable substances are used in metallurgical processes to reduce the primary energy input or are recovered via the product. The injection is carried out, for example, in shaft furnaces or in the molten bath of electric arc furnaces or induction furnaces.

Objectives:

• Recovery of iron, valuable alloying elements (eg Cr, Ni), as well as non-ferrous metals (eg Zn)
• Saving primary energy and high-quality coke
• Use of cost-effective secondary reducing agents (eg Al), thereby saving more expensive, primary alloying agents for high-alloy steel (eg FeCr)
• Improvement of product slag properties (eg with regard to chromium elution)
• Productivity increase by chemical heating (eg in the electric arc furnace)

Our portfolio:

• Design of injection lances and manifolds
• Energy and material balancing as well as monitoring of the product quality and optimization of the process efficiency
• Operational tests for melt bath and shaft injection with BFI injection systems