| 摘要 |
<p>PURPOSE:To decrease the content of phosphorus in steel at a low cost by a simple method by impressing a DC voltage between the melt of pig iron or steel and a molten flux and electrolyzing the melt. CONSTITUTION:A molten flux 3 of >=1 kind among salts of alkaline earth metals such as Ca, Ba, Mg or the like is added onto the molten metal 2 in a ladle 1. A cathode plate 4 of pure iron or the like is mounted on the bottom of the ladle 1, and an anode plate 5 of artificial graphite or the like is suspended into the flux 3. The forward end of the anode plate is dipped in the flux 3. When the molten metal is electrolyzed by impressing a DC voltage between the plate 4 and the plate 5, the salts of Ca, Ba and Mg in the flux 3 are reduced to metallic Ca, metallic Ba and metallic Mg, which accumulate at the boundary of the metal 2 and the flux 3. These metals react with the phosphorus in the metal 2 and the molten metal is dephosphorized. The steel which is improved in both mechanical strength and cleanliness is obtained by the above-mentioned dephosphorizing method.</p> |
