D.C. arc furnace having electrically conductive hearth and metho

Details D.C. arc furnace having electrically conductive hearth and metho D.C. arc furnace having electrically conductive hearth and metho

1988-03-16

1989-08-01

Silbaugh, Jan H.

Industrial electric heating furnaces

Arc furnace device

Furnace body detail

264 291, 264 30, 264345, B29C 7102, F27D 104, F27D 116

Patent

active

048539414

ABSTRACT:
A new method of making an electrically conductive hearth in a d.c. furnace is effected by first heating bricks such as magnesite-graphite bricks and the like, from their new commercially available form to high temperatures decresing the normal resistivity of the bricks and thereafter laying the bricks to form the hearth from top to bottom with the heat treated bricks.

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patent: 4701427 (1987-10-01), Boecker et al.
patent: 4710480 (1987-12-01), Buschmann et al.

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