Channel: Furnace technology
Landglass: air convection at its best

2010-01-01 | Furnace technology

Furnace manufactures must continuously update and improve their furnaces to deal with the ever changing types of glass on the market. The present global climate has obliged glassmakers to look for a way of saving energy, while protecting the internal areas of buildings at the same time, resulting in increased use of low-E glass. In this article, we take a look at how Landglass has responded to this situation with its Jet Heating Furnaces.

Landglass: air convection at its best
Thanks to its features of low emissivity and energy-saving, low-E glass is becoming more popular and more widely used in buildings. However, conventional radiation furnaces are facing difficulties in tempering soft-coated low-E glass because of its disadvantages, namely low emissivity. In response to market demand, Landglass has researched and developed a jet heating convection furnace. In this Jet Heating Furnace, the air at high temperature is blown onto the glass surfaces forcefully, so that the glass sheets can be heated quickly and higher temperature settings, which are needed for conventional radiation heating furnaces for quick heating, are not necessary for jet heating furnaces, which therefore enables to overcome the difficulties in low-E glass tempering. Furthermore, with high temperature zone control technology, the furnace is able to work for a much longer lifespan. After continuous improvements made by its engineers, Landglass technology in convection heating has become the most advanced in the world, making Landglass the pioneer in convection furnace building. On 20 August 2008, Landglass successfully delivered the first 3 x 10 metre jet heating furnace, attracting much attention in the glass industry.
The advantages of jet heating furnace can be listed as follows:
1. shortening of heating time to 26-30 seconds per millimetre, and lowering of waviness to 0.1 millimetres per 300 millimetres;
2. unique direct connection of hot air blower and air guiding...


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Article taken from Glass-Technology International bi-monthly magazine (6 issues per year)
Year: 2010 number: 1
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