PURPOSE: To improve the energy efficiently of temp. rising in a secondary refining furnace and to reduce the cost in a melting and secondary refining method for steel by tapping the molten steel into a primary ladle after melting the steel with an electric furnace, and successively, pouring into the secondary refining furnace and heating to rise the temp. and flowing into a secondary ladle in which gas bubbling is executed.

CONSTITUTION: The secondary refining furnace 2 is formed as a trough type, and storing basin parts 4a, 4b are arranged in both ends and iron-made electrodes 5 are arranged at these both storing basin parts 4a, 4b and the molten steel flows down into the one side of the storing basin part 4a from the primary ladle, and further when the molten steel flows down into the secondary ladle 3 from the other storing basin part 4b, by conducting the electric powder from both electrodes 5 dipped into the molten steel, the molten steel is heated by resistance heating.