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Hundreds of ceramic FLOX® burners fire an annealing furnace
© WS Wärmeprozesstechnik GmbH
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A beginning in the industry

The early 1990s saw the development of recuperative FLOX burners, with which the hot exhaust gases preheat the combustion air in the burner via a heat exchanger, and of regenerative burners, with which the waste heat is used via intermediate storage. Now, the user can choose from a broad range of mass-produced products for various applications.

Steel industry

The steel industry is a pioneer in the implementation of FLOX burners. Most burners are implemented here, in the metal industry, and in heat treatment furnaces. A decisive breakthrough came with the development of ceramic recuperative burners, which are considerably more temperature-resistant than burners made of chrome-nickel steels, and which have a long service live. With these burners, high temperature processes which previously required electricity can also be fuelled economically with natural gas. The ceramic burners not only have advantages at high temperatures, but also when it comes to using as much waste heat as possible at lower temperatures. To date, several thousand ceramic burners have been installed.

Glass and ceramics industry

In glass production and processing, significant nitrogen oxide emissions arise, which entail high costs for secondary exhaust gas purification. Therefore, there is considerable interest in low-emission production processes. Yet at the same time, there are reservations with regard to deviation from proven production methods. Many production details are based on empirical experience, which upon alterations must be reacquired, entailing considerable effort. Similar hurdles must be crossed in the ceramics industry. Here too, there is considerable potential for implementation, but simultaneously there are reservations when it comes to altering highly integrated processes. In both cases, a great deal of effort must be invested in research and persuasion in order to depart from the beaten track.

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