Abstract
The relation of blast quantity and combustion ratio on cupola operation has been studied. The experiments have revealed the following:
(1) From the blast quantity, cupola operation is divided in two groups which are: (1) the operation with air input below and (2) above the critical blast quantity.
(2) Under constant operating conditions except blast volume in the former case the iron temperature increases with an increasing blast input but the combustion ratio is held constant. In the latter case, however, with an increasing blast input there occurs the increase of combustion ratio and the drop in iron temperature.
(3) In the former case, blast volume has to be controlled at constant value, but must not be adjusted with the change of combustion ratio. In the latter case, blast volume may be adjusted with the change of combustion ratio.
