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There are many different types of cupola furnaces: cold blast, hot blast, with and without oxygen, conventional and long campaigns. The quality of the melting process with the oxidation and reduction reaction taking place makes the cupola less sensitive to low quality charge materials and contaminants than other electric melting furnaces: Highly oxidised and low quality scrap materials as well as low grade alloys can be used. The cupola capacities vary from a few tons to 100 tons per hour
The introduction of the melt zone cooling has allowed for the extension of the campaign lengths from one day (daily cupola), to a few weeks (medium campaign cupola) and up to several months (long campaign cupola) depending on the cupola design, its size and the operating practice.
The majority of foundries producing high volumes of iron for applications such as the automobile and water distribution industries is using mainly medium and long campaign cupolas.
The three main types of water cooled cupolas/cupola furnaces are:
- liningless melting zone with pressurised siphon box
- liningless melting zone with atmospheric siphon box
- fully lined cupola with atmospheric siphon box.
The CALDERYS Group provides a full range of solutions for all the parts of the cupola including the siphon box, the well area, the melting zone, the stack and the gas offtakes. The ongoing trend has shown that most of the long campaign cupolas have made the transition from graphitic ramming mixes to graphitic ultra-low cement castables for the lining of the melting zone, well and siphon box.
For further information please mail.
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