C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/10 (2006.01) C22B 3/06 (2006.01) C22B 34/10 (2006.01)
Patent
CA 2513309
A process for leaching a value metal from a titanium-bearing ore material comprising the step of leaching the ore material at atmospheric pressure with a lixiviant comprising a chloride and hydrochloric acid is disclosed. The leaching conditions are such that titanium is leached and remains in solution. The temperature is maintained at less that 85~C, and the concentration of hydrochloric acid is preferably less than 20% (mass ratio). The preferred chloride is magnesium chloride. The lixiviant may contain oxidant e.g. sodium chlorate or chlorine.
L'invention concerne un procédé de lixiviation d'un métal précieux à partir d'un minerai contenant du titane, consistant à lixivier le minerai à la pression atmosphérique à l'aide d'un lixiviant comprenant un chlorure et de l'acide hydrochlorique. Les conditions de lixiviation permettent de lixivier le titane qui reste en solution. La température est maintenue à moins de 85 ·C, et la concentration d'acide hydrochlorique est, de préférence, inférieure à 20 % (rapport de masse). Le chlorure préféré est le chlorure de magnésium. Le lixiviant peut contenir un oxydant, par exemple du chlorate de sodium ou du chlore.
Chan Benjamin Chun Pong
Harris G. Bryn
Lakshmanan Vaikuntam I.
Puvvada George
Sridhar Ramamritham
Canadian Titanium Limited
Process Research Ortech Inc.
Sim & Mcburney
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