| 摘要 |
<p>Hot metal is circulated by R-H unit (28) in a closed loop path through first and second hearths (10 and 11) and chambers (12, 14, 16 and 18). Titaniferous material containing iron oxide is introduced into first hearth (10) and the iron oxide therein is reduced in a heating zone in the first hearth (10) to iron to produce titania slag having a reduced iron content which is removed in chamber (12) before the hot metal passes via an underflow weir (22) into chamber (14) at which coal is added and a proportion of the hot metal is removed. The addition of coal is such that more than 2 % by weight of carbon dissolves in the hot metal in the second hearth (11). Coal ash slag is removed at chamber (16), whilst the hot metal containing the dissolved carbon is recirculated to the first hearth (10).</p> |
