Effect of air preheating on blast furnace efficiency

For medium-sized foundries producing up to 2000 tonnes/month of good castings, the hot blast cupola is difficult to consider, in particular because of the large investment it requires. In these instances, the cold blast cupola prevails for some types of production. The hot blast cupola remains the most widely applied melting device for mass production foundries, e g. for parts for the automobile industry, centrifugal casting, road accessories. 

Hot blast cupolas are normally set up for long campaign operation, in order to minimise process switch overs and maintenance time and effort. 

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Figure 2.10 Effect of air preheating on blast furnace efficiency [44, ETSU, 1993]...

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