Oxyfuel application for steel production
A portfolio of approaches tailored to different furnace and application requirements
Looking at the value chain of steel production, the reheating process step is a key success factor in the drive for optimisation. From combination of knowledge and experience of gas and combustion experts, furnace specialists and engineers who learned their trade within the steel and metallurgical industries. Linde has developed two leading technologies to optimise reheating furnaces. If you would like to maximum benefits with minimum changes to your existing operation, we recommend increasing the oxygen content using high velocity lances. Alternatively, for customers who want to maximise the benefits of oxygen and are willing to replace the combustion system, we have developed flameless oxyfuel.
Conventional oxyfuel combustion
Using oxygen instead of or in addition to air offers a number of advantages.
- For instance, oxygen eliminates the nitrogen ballast of air and thus increases the energy efficiency of the furnace.
- It also raises the concentration of CO₂ and H₂O in the furnace atmosphere. And since these gases are mainly responsible for thermal radiation, oxyfuel significantly increases thermal efficiency and heat transfer.
Flameless oxyfuel combustion
Flameless oxyfuel shares the same benefits as conventional oxyfuel but incorporates several important advantages. As the technology utilises high velocity oxygen lances, flue gases are recirculated, creating a diluted combustion zone. This results in lower peak temperatures and lower thermal NOx. At the same time, the flame has a high momentum and a large volume, which ensures proper mixing of radiating gases and greater temperature uniformity inside the furnace.
REBOX® is not a ”one size fits all” solution but a portfolio of approaches tailored to different furnace and application requirements. REBOX® solutions can be incorporated into new and existing furnaces without increasing the existing footprint. They are compatible with all conventional fuels and most types of furnace, from large pushers and walking beams through rotary hearths to various batch furnaces.
In close interaction with you, our team assesses each new potential REBOX® installation and draws up the design and the guaranteed performance improvements that will be achieved. Today, over 140 REBOX® installations have been delivered successfully.
Customer are welcomed to reach out to the below contact for more information:
Linde Gas Vietnam
Phone: +84 254 3 923 431
Email: info.vn@linde.com