| 摘要 |
PCT No. PCT/GB93/01054 Sec. 371 Date Feb. 19, 1997 Sec. 102(e) Date Feb. 19, 1997 PCT Filed May 21, 1993 PCT Pub. No. WO93/24668 PCT Pub. Date Dec. 9, 1993Hot metal is circulated by an R-H unit in a closed loop path through first and second hearths and chambers. Titaniferous material containing iron oxide is introduced into the first hearth and the iron oxide therein is reduced in a heating zone in the first hearth to iron to produce titania slag having a reduced iron content which is removed in chamber before the hot metal passes via an underflow weir into chamber at which coal is added and a proportion of 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. Coal ash slag is removed at chamber, while the hot metal containing the dissolved carbon is recirculated to the first hearth. |
