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Converted billet heater boosts tube mill output
A
Linde Gas product story
Edited by the Manufacturingtalk editorial team
Feb 25, 2008
Gas company converted a rotary hearth furnace to oxy-fuel firing for billet reheating at a tube mill and provided 25% more capacity and 50% less fuel consumption.
ArcelorMittal Shelby - Tubular Products, Shelby, Ohio, USA, is a North American market leader for seamless and welded tubular products.
The mill supplies the automotive, oil and gas and construction markets.
The company needed to boost the seamless tube mill output for larger billet dimensions while minimising energy and maintenance costs.
In the second half of 2007, The Linde Group converted a rotary hearth furnace for billet reheating, on a turnkey basis.
A compressed project timeline of four months from contract signing to commissioning was necessary to meet the objectives and time constraints of this project plan.
The formerly air fuel fired furnace was equipped with a Rebox oxy-fuel system that including flameless technology.
The conversion was made in two steps, first using oxygen-enrichment for a short period of time before implementing of the flameless oxy-fuel operation.
Excellent results have been achieved, said Linde, including a 25% increase in reheating capacity and a 50% reduction in fuel consumption, fulfilling the performance guarantees.
Moreover, the temperature uniformity improved, producing better piercing results.
The scale formation was reduced by 50%, and the emission levels of NOX and CO2 were also significantly minimised, said Linde.
Rebox oxy-fuel solutions are employed in over 110 reheating and annealing furnaces worldwide.
The use of oxy-fuel will further improve important parameters such as fuel consumption, throughput capacity and emission levels.
Compared to air fuel solutions, oxy-fuel can boost production throughput up to 50% as well as reducing fuel consumption and CO2 emission by 50%.
The first installation of this kind took place at Timken in the US in 1990.
* About Linde Gases Division - the Gases Division of The Linde Group is a leading supplier of industrial and medical gases and related services.
The Linde Group is a world leading gases and engineering company with more than 50,000 employees working in around 100 countries worldwide.
Following the acquisition of The BOC Group plc, the company has gases and engineering sales of approximately EUR 12 billion per annum.
The strategy of The Linde Group is geared towards earnings-based growth and focuses on the expansion of its international business with forward-looking products and services.
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