William Siemens first demonstrated the arc furnace in 1879 at the Paris Exposition by melting iron in crucibles; horizontally placed carbon electrodes produced an electric arc above the container of metal.

• 西门子首先于1879年在巴黎博览会展出在坩埚中熔化生铁的电弧炉,在电弧炉内,水平放置的炭质电极在金属容器上方发生电