Here he carried out his first experiments to obtain steel from iron ores using a small shaft furnace equipped with two electrodes capable of heating the minerals thanks to a 95 kW indirect arc.
In the same year, in Darfo (BS), he carried out other tests on a similar furnace, equipped with three electrodes working at 370 kW.
[2] In 1898 Stassano patented the principles and technical solutions of his furnaces in Italy, Austria, Spain, Luxembourg, Belgium, Norway, England, Sweden, Germany and USA.
[2] Between 1906 and 1907 a number of Stassano furnaces were activated at the Bonner Faserfabrik plants in Bonn (Germany), in St. Polen (Austria), in Dunston-on-Tyne and Newcastle (UK), in Bridgeton and Redondo (USA).
[1] The indirect arc electric furnace of the Stassano type, in its final configuration, is made from a cast iron cylindrical structure lined internally with refractory bricks.
[2] On the upper part of the furnace side wall, in correspondence with the space that houses the three graphite electrodes, are the couplings of the latter, placed at 120° from one another.