Process for the treatment of electric arc furnace dust

C - Chemistry – Metallurgy – 22 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C22B 7/02 (2006.01) C22B 3/10 (2006.01) C22B 3/26 (2006.01) C22B 13/10 (2006.01)

Patent

CA 2156295

In a process for the treatment of electric arc furnace (EAF) dust, the dust is first subjected to atmospheric leaching with a ferric chloride solution and thereafter subjected to treatment in an autoclave at an elevated temperature and pressure for conversion of low temperature stable goethite (FeO.OH) to a filterable crystalline hematite (Fe2O3) in an acidic chloride solution. Zinc is recovered from the solution by solvent extraction using a solvating extractant followed by stripping and zinc recovery by electrolysis of zinc chloride or zinc sulphate solution. Load is separated from the solution by cooling to precipitate lead chloride.

Dans un procédé de traitement de la poussière d'un four à arc électrique, la poussière est d'abord soumise à un lessivage à l'air par une solution de chlorure ferrique, puis elle est soumise à un traitement dans un autoclave, à température et à pression élevées, pour la conversion de la goethite (FeO.OH) stable à basse température en hématite (Fe2O3) cristalline filtrable, dans une solution acide de chlorure. Le zinc est récupéré de la solution par une extraction par solvant faisant appel à un agent de solvation, suivie par un stripage et une récupération du zinc par électrolyse de la solution de chlorure de zinc ou de sulfate de zinc. Le plomb est séparé de la solution par refroidissement pour précipiter le chlorure de plomb.

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 for the treatment of electric arc furnace dust 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 for the treatment of electric arc furnace dust, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the treatment of electric arc furnace dust will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1343065

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