Product category:
Metals heat treatment, mechanical stress relieving
News Release from: Linde Gas | Subject: Carbojet system at TUBE 2008
Edited by the Manufacturingtalk Editorial
Team on 27 March 2008
Furnace heat and carbon transfer rates
improved
High Speed Gas Injection alters the furnace atmosphere and create gas circulation, which improves convection and increases the heat and carbon transfer rates.
The Gases Division of The Linde Group will launch a new version of its Carbojet system at TUBE 2008 in Dusseldorf, Germany With high speed gas injection, Carbojet alters a furnace atmosphere and engenders gas circulation, which improves convection and increases the heat and carbon transfer rates
This article was originally published on Manufacturingtalk on 16 Feb 2007 at 8.00am (UK)
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The patented Carbojet high speed nozzles use only 1m3 of gas to alter 30m3 of furnace atmosphere.
Companies like Sennestahl in Bielefeld, Germany have achieved remarkable cost savings with Carbojet, said Linde.
Carbojet can eliminate a major disadvantage of regular furnaces, because the system enables a stable atmosphere in furnaces that have no ventilators.
Further reading
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Linde Gas will demonstrate its range of proven and viable solutions for the iron, steel and metals industries at the parallel GIFA, METEC and THERMPROCESS fairs in Germany, 12-16 June 2007.
Gas burners for the metals industry demonstrated
Gas burners for the iron, steel and metals industries offer improved yield and quality, enhanced throughput and reduced costs, as well as limited environmental impact.
Flameless oxy-fuel rotary hearth furnace delivered
A flameless oxy-fuel rotary hearth furnace, delivered to a speciality steels company, provides 35% increased heating capacity and 35% reduction in fuel consumption.
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, customised systems provide better quality of products and increase productivity through faster carburisation processes.
* Carbojet experience at Sennestahl - at Sennestahl 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 at 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".
Product manager of the Heat Treatment Department, Linde Gas, told manufacturingtalk: "With Carbojet we are able to offer a unique solution to the market, that differentiates us from competing gas companies or furnace manufacturers.
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 system has many advantages for product quality as follows.
* 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, said Linde.
Since the first Carbojet system 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.
* About the 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 around 50,000 employees working in about 100 countries and achieved sales in the 2007 financial year of EUR 12.3 billion.
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.
* Linde Gases Division at Tube 2008 International, Dusseldorf, Germany, March 31-April 4 April, Hall 8a, Stand B17.
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