| 摘要 |
<p>A process for smelting iron-containing source material in a reactor containing a slag bath, comprises generating heating and reducing conditions in at least one reducing region of the bath by injection of fuel/reductant and oxygen-containing gas by at least one top submerged lance. The source material is fed to the reactor together with additional reductant and with flux at or adjacent the at least one reducing region so as to be subjected to smelting reduction, using coal as the additional reductant. The rates of injection of oxygen and fuel/reductant are controlled to achieve required, sufficient reducing conditions by providing the injected gas with an oxygen content of from about 40 % to about 100 % sufficient for a degree of combustion of the fuel/reductant of from about 40 % to about 50 %; and wherein CO and H2 generated by the smelting operation, as well as carbon dust carried out of the bath by combustion gases, are subjected to post-combustion in the reactor, enabling efficient heating of the bath whilst preventing re-oxidisation of the bath contents.</p> |
