"AND THERMIT WELDING.
THERMIT - Thermit is a mixture of aluminium powder and iron oxide.
This steel represents about one-half of the original thermit by weight and one-third by volume.
Thermit was discovered by Dr. Hans Goldschmidt of Essen, Germany, in 1895, while trying to reduce chromium and manganese.
Thermit is now used considerably in the foundry for purifying iron and steel in the ladle.
For this purpose the thermit is placed in a can on the end of a rod and plunged to the bottom of the molten metal.
Thermit Welding-Two >>
B - Gap cut out for entrance of Thermit Steel.
C - Thermit weld before removing riser and pouring gate.