C - Chemistry – Metallurgy – 21 – B
Patent
C - Chemistry, Metallurgy
21
B
53/20
C21B 3/04 (2006.01) C04B 5/06 (2006.01) C04B 7/17 (2006.01) C21B 3/06 (2006.01)
Patent
CA 1101676
ABSTRACT OF THE DISCLOSURE The invention relates to a method for working-up a waste slag from the oxygen steel production (L.D.-slag), comprising reducing metal oxides being present in the slag to metal by means of a reducing agent with the addition of an Al2O3-containing additive and separating these from the slag, said method being characterized in that the L.D.-slag is mixed beforehand with an additive (additives) at least containing the oxides of aluminium and silicon said additive(s) being used in a ratio of 45 - 2? parts of additive to 55 - 97? parts of L.D.-slag and with carbon as a reducing agent and the reduction substantially takes place in the solid phase, whereafter between about 1250°C and 1500°C the iron is separated from the newly formed slag and is subsequently removed and furthermore the invention relates to portland cemont clinker produced from raw materials obtained from L.D.-slag treated according to the above-described method.
290269
Goessens Lambertus H.
Wolfs Andreas G.j.
C.b.r. Cementbedrijven N.v.
Eerste Nederlandse Cement Industrie (enci) N.v.
Swabey Ogilvy Renault
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