Abstract
In the 2nd report, we informed that the blast was unable to penetrate deeply into the cnpola installed with ordinary tuyéres. In this paper, we will report the results of the study on the penetration of the blast into the furnace installed with the prcjecting water-cooled tuyéres.
The gist of the results obtained are as follows :
(1) When the projecting tuyére is used in place of the ordinary one, the blast pressure required to blow the same quantity of blast into the furnace is lowered, and also the tendency of clogging up the tuyére with slag is decreased.
(2) From the distribution of temperature and CO2% in the furnace, it is justly said that the penetration of the blast is considerably improved by using the projecting tuyére.
(3) In this experiment, melting rate, tapping temperature and the chemical components of the metal were not affected mostly by projecting the tuyére.
