| 摘要 |
<p>PURPOSE:To easily modify slag having high basicity such as converter slag into one having low basicity, therefore to reutilize it and to recover valuable metals by blowing oxygen into a converter while slag having high basicity is charged thereto together with a carbonaceous material and the source of SiO2. CONSTITUTION:Oxygen is blown into a converter stored with a suitable amt. of molten metals in a furnace while slag having high basicity such as converter slag, dephosphorized slag and desulfurized slag are charged thereto together with a carbonaceous material such as coke and coal and the source of SiO2 such as quartz sand. In this way, the basicity of the above slag is regulated to <=1.5, and, at the same time, (T, Fe), (MnO), (P2O5) or the like in the slag are reduced and recovered into the molten metals. In this way, valuable metals such as Fe, Mn and P in the slag can be recovered, and the slag having high basicity such as converter slag or the like can be used as a roadbed material in the same manner as a blast furnace slag.</p> |
