Synthetic rutile production

Details Synthetic rutile production Synthetic rutile production

C - Chemistry, Metallurgy

22

B

C22B 34/12 (2006.01) C21B 13/00 (2006.01)

Patent

CA 2136426

ABSTRACT OF THE DISCLOSURE Hot metal is circulated by R-H unit in a closed loop path through first and second hearths and chambers. Titaniferous material containing iron oxide is introduced into 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 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. Coal ash slag is removed at chamber, whilst the hot metal containing the dissolved carbon is recirculated to the first hearth.

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