C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 23/00 (2006.01) C22B 3/04 (2006.01) C22B 3/08 (2006.01)
Patent
CA 2360704
The starting material is lateritic ore which contains nickel oxide and/or cobalt oxide. From water and comminuted ore, of which at least 80 wt-% have grain sizes of not more than 0.5 mm, a pumpable suspension is formed. The ore-containing sus- pension is passed through an indirectly heated preheating tube, the suspension being heated to 150 to 250°C. The heated suspension is passed through a mixing line in which an acid in a minimum amount of 10 kg per 100 kg ore, calculated anhy- drous, is admixed to the suspension, and the acid-containing suspension is passed through a dwell time tube in which the dwell time of the suspension is at least 0.1 minutes. Pref- erably, sulfuric acid is introduced into the mixing line.
Anastasijevic Nicola
Heibel Hans-Jurgen
Schimo Siegfried
Schmidt Hans Werner
Mg Technologies Ag
Robic
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