Process of treating sulfide ores containing gold and/or...

C - Chemistry – Metallurgy – 22 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C22B 1/02 (2006.01) C22B 1/06 (2006.01) C22B 1/10 (2006.01) C22B 11/00 (2006.01)

Patent

CA 2199529

The ore which contains gold and/or silver and as accompanying metal at least iron is calcined at temperatures in the range from 500 to 900°C with the addition of oxygen-containing gas. There is obtained a metal-oxide-containing solids mixture and a SO2-containing exhaust gas. The solids mixture from the calcination is cooled, the temperature being reduced by at least 50°C. The cooled solids mixture is added to a fluidized-bed reactor, and SO2-containing exhaust gas is introduced into the fluidized-bed reactor. In the reactor, metal sulfate is produced in the solids mixture, so that at least 10 % of the sulfur content are bound in the exhaust gas. Solids mixture containing metal sulfate is withdrawn from the fluidized-bed reactor, is stirred up with an aqueous acid solution, thereby dissolving metal sulfate. The remaining solids are supplied to a recovery of gold and/or silver.

Un minerai qui renferme de l'or et (ou) de l'argent avec, comme métal d'accompagnement, au moins du fer, est calciné à des températures se situant dans une plage de 500 à 900 °C, avec addition de gaz renfermant de l'oxygène. On obtient un mélange de solides contenant des oxydes métalliques et un gaz d'échappement renfermant du SO2. Le mélange de solides provenant de la calcination est refroidi, la température étant abaissée d'au moins 50 °C. Le mélange de solides provenant de la calcination est chargé dans un réacteur à lit fluidisé, dans lequel on introduit également le gaz d'échappement renfermant du SO2. € l'intérieur du réacteur, il y a production de sulfate de métal dans le mélange de solides, de telle façon qu'au moins 10 % de la teneur en soufre soit liée au gaz d'échappement. Le mélange de solides renfermant le sulfate métallique est retiré du réacteur à lit fluidisé et brassé avec une solution aqueuse acide, ce qui entraîne la dissolution du sulfate métallique. Les matières solides restantes sont dirigées vers une installation de récupération d'or et (ou) d'argent.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Process of treating sulfide ores containing gold and/or... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process of treating sulfide ores containing gold and/or..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process of treating sulfide ores containing gold and/or... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1981650

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.