Evolution of Furnace Design and Operation

As indicated above, there has been progressive improvanent in the design and capability of the standard blast furnace and considerable expansion in its capacity. 

Typical Imperial Smelting Furnace slag composition. 

Component ratio Typical value Ranse in values 

2 - Original imperial smelting process furnace configuration water jackets in lower shaft. 

The formation of accretions in the shaft was a particularly serious problem with the early design, aggravated by water leaks from the jackets forming the lower shaft. This problem became more significant as attempts were made to increase the blast intensity and productivity of the furnace. It was 

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