by clicking the arrows at the side of the page, or by using the toolbar.
by clicking anywhere on the page.
by dragging the page around when zoomed in.
by clicking anywhere on the page when zoomed in.
web sites or send emails by clicking on hyperlinks.
Email this page to a friend
Search this issue
Index - jump to page or section
Archive - view past issues
button in toolbar for more information.
Metal Casting Technologies : September 2008
TECHNICAL FEATURE Figure 9. Design of a 900 kW Oxipyr®-Flex for short drum furnace for lead recycling Design of the Oxipyr®-Flex The idea was a longitudinal adjustable burner head with a resulting change in cross-section between the wall and burner head. The staged natural gas supply enables the exact adjustment of the flame parameters for every furnace type. A control range of at least 1:20 in flameless mode of operation was the targeted value, which was reached successfully. The fuel gas velocities can be kept low for high dust concentrations and high for dust free feed. The ceramic burner block or outer metal tube is available in metal or ceramic design in order to allow a maximum of flexibility of the furnace system. An example for the field of application in the recycling industry is shown in Figure 9 by means of a 900 kW Oxipyr®-Flex burner. The length and the mounting of the burner can be shaped according to the needs of the customer, if necessary also water cooled. Conclusion In this paper, the state of the art of burner technologies has been displayed. The usage of oxygen in the combustion process leads to many benefits, especially concerning the reduction of energy costs. Every furnace is different, and without the experience and knowledge of the process, the furnace and the knowledge of the burner technology no economic solution can be achieved. The Oxipyr®-Flex combines the controllability of many Oxipyr®-P burners, including the flameless combustion, has a significant influence on the economics of melting processes in the light and non-ferrous metal industry. The increased flexibility is gained because of the possibility to operate at different power levels. This shortens melting times while 88 www.metals.rala.com.au REFERENCES 1 Wieck, D.: Sauerstoff für Hochtemperaturprozesse, Messer Sonderdruck Ausgabe 9037, 1998 2 Holleis, B., Spoljaric, D., Adendorff, M.: Einsatz von technischen Gasen in Giessereien Sauerstoff bei Schmelzprozessen, Giesserei-Rundschau 52, 2005 3 Milani et. al.: Flameless Technologies: Industrial Applications and R & D projects in Italy 5th Int. Symposium in Hight Temperature Air Combustion and Gasification, Tokyo, 2002 4 Schuster, F.: Verbrennungslehre, Oldenbourgverlag, (1970) 5 www.maerz-gautschi.com, (retrieved on the 2.3.2007) 6 Spoljaric D.; Wieck D.: EP1402078 - Method for melting down aluminum, 2004-03-31 reducing melting loss and refractory wear. The mixing burner Oxipyr®-Air combines the positive features of air burners with those of oxygen burners including the flameless combustion. The increased flexibility results from the possibility to use different air oxygen mixtures. This leads to faster melting times. The broad control range of oxygen (21 – 60 and 100%) for temperature holding, melting or simply for saving fuel and the good power control range keeping the pollutant emission levels low have to be highlighted. The combination of the oxyfuel burner with the external off gas recirculation leads to highest production improvements . The Messer Group has experienced technical staff and will cooperate with you in an effort to optimize every furnace type. ¦