Channel: Furnace technology
S.I.G.MA.: mullite for the critical areas of regenerator chambers

2013-08-09 | Furnace technology

Furnaces are a critical part of glassworks, and each furnace also has its own critical areas. In this article, S.I.G.MA. shows how choosing the correct type of refractory material cannot only improve products, but also increase furnace life considerably.

Over the last 50 years, the progress of science and technology has completely transformed glass furnaces
Introduction
The main discussion of this article is to establish the most suitable types of refractory material to install in the upper part of regenerator chambers, which, today, is a critical area of glass furnaces. The article looks into the change in types of refractory material that have taken place, in almost all areas of the glass furnace, due to the change in position of the critical areas.
In order to increase specific pull, design criteria have also changed, modifying operating conditions (temperature, chemical reactions, high temperature loading, etc.), which have become more stringent. Moreover, regenerator chambers have undergone changes in operating conditions, thus requiring new and better refractory materials that can withstand higher physical-chemical stresses.

General information on critical areas of glass furnaces

Over the last 50 years, the progress of science and technology has completely transformed glass furnaces, continuously improving glass quality and increasing daily production. In the 1960s, for example, glass furnaces were poorly insulated, sillimanite blocks were used in the melting tank sidewalls, crowns were much closer to the glass and there were no bubblers or electrodes in the bottom.
In parallel with continuous design changes, the less resistant areas, which were often responsible for furnace breakdown (and for this reason they were called critical areas), have repeatedly changed position.
The availability of new types of refractory material...






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Article taken from Glass Machinery Plants & Accessories bi-monthly magazine (6 issues per year)
Year: 2013 number: 4
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