Mar 21 2008
The Gases Division of The Linde Group today announced that it will launch a new version of its CARBOJET® solution at TUBE 2008 in Dusseldorf, Germany.
With high speed gas injection, CARBOJET® makes it possible to alter the furnace atmosphere and create gas circulation, which improves convection and increases both the heat and carbon transfer rates. The patented CARBOJET® high speed nozzles utilise only 1m3 of gas to alter 30m3 of furnace atmosphere. Companies like Sennestahl GmbH in Bielefeld, Germany have achieved remarkable cost savings with CARBOJET®.
CARBOJET® can eliminate a major disadvantage of regular furnaces, because the solution enables a stable atmosphere in furnaces that have no ventilators. It consists of one or several CARBOJET® high speed nozzles with piping and flow train. The number of nozzles corresponds to the furnace size and existing gas consumption. Gas flows can be controlled manually or through a CARBOFLEX® atmosphere control system. As a result, tailor-made solutions provide better quality of products and increase productivity through faster carburisation processes.
CARBOJET in practice
At Sennestahl GmbH in Bielefeld, Germany, CARBOJET® was installed with two pit furnaces in August 2006 and in January 2007. Though the CARBOTHAN® control system was already installed, the greatest benefit of using CARBOJET® was being able to operate the pit furnace without fans, which resulted in significant savings on maintenance costs. Dietmar Holzenbecher, Production Manager, Sennestahl explained: “Broken ventilators are now history. I am absolutely convinced that this technology is a success in our rugged, non-stop operation. We’ve already seen a noticeable reduction in maintenance costs, which wouldn’t have been possible without the introduction of CARBOJET®.”
“With CARBOJET® we are able to offer a unique solution to the market, that differentiates us from competing gas companies or furnace manufacturers,” added Sami Ahonen, Product Manager of the Heat Treatment Department, Linde Gas. “We are proud of the high satisfaction expressed by our clients with Linde’s new heat treatment solution.”
Higher product quality and optimised heat treatment with CARBOJET®
The CARBOJET® solution has many advantages for product quality
It homogenises product quality in tube annealing and other heat treatment processes
It increases the utilisation of carburising gases and reduces the soot formation
It optimises the physical and thermodynamic process of heat treatment
It provides better control of the overall process enabling a marked improvement in product quality
CARBOJET® technology can be used in various heat treatment processes (annealing, carburising, carbonitriding etc.) and has proven to be a success in roller hearth, belt, rotary retort, and pit furnaces. Since the first CARBOJET® solution was developed three years ago, Linde Gas has implemented over 20 installations at 15 European heat treatment companies. These include some leading tube manufacturers who have been able to anneal steel tubes with higher and more homogeneous quality after the installation of CARBOJET®.
Posted March 21st,2008