In carrying out the acid Bessemer process, the converter, preheated to about 1200 0 C. by burning coke in it, is turned into the position shown in fig.
Gjers did this by setting the partly solidified ingot in a well-closed " pit " of brickwork, preheated by the excess heat of previous lots of ingots.
Prick the pastry lightly with a fork and bake in a preheated 350 degree Fahrenheit oven for 10 to 12 minutes before filling.
equilibrates with preheated incoming air entering the combustion chamber.
It is preheated in a high capacity heat exchanger by the combustion products.