Method of processing non-ferrous smelting intermediate...

C - Chemistry – Metallurgy – 01 – G

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C01G 28/00 (2006.01) B01D 9/02 (2006.01) C02F 1/70 (2006.01) C02F 1/72 (2006.01) C22B 3/44 (2006.01) C22B 7/00 (2006.01) C22B 30/04 (2006.01)

Patent

CA 2694793

Provided is a method of easily producing easily-filterable and stable scorodite that meets the leaching standard (conformance to Japanese Environmental Agency Notice 13) with excellent reproducibility and without using complex operations, when processing arsenic that is included in non-ferrous smelting intermediates, and particularly when processing arsenic in the form of a sulfide. Scorodite is produced by a leaching step of leaching arsenic from a non-ferrous melting intermediate containing arsenic in the weakly acid region, a solution adjusting step of oxidizing trivalent arsenic to pentavalent arsenic by adding an oxidizing agent to the leaching solution, and a crystallizing step of converting the arsenic in the adjusted solution to scorodite crystals.

L'invention concerne un procédé de traitement de l'arsenic contenu dans un produit intermédiaire de fusion non ferreux, en particulier un procédé de traitement de l'arsenic sous la forme d'un sulfure, lequel, tout en satisfaisant aux normes de lixiviation (conformément à la notice n° 13 de l'agence pour l'environnement), produit de la scorodite stable qui excelle en termes d'aptitude à la filtration facile sans opération lourde avec une reproductibilité élevée. Ledit procédé de production de scorodite comprend : une étape de lixiviation consistant à lixivier l'arsenic dans une région faiblement acide à partir d'un produit intermédiaire de fusion non ferreux contenant de l'arsenic ; une étape d'ajustement du liquide consistant à ajouter un agent oxydant au lixiviat pour effectuer de cette manière une oxydation de l'arsenic trivalent en arsenic pentavalent ; et une étape de cristallisation consistant à convertir l'arsenic contenu dans le liquide ajusté en cristaux de scorodite.

LandOfFree

Say what you really think

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

Rating

Method of processing non-ferrous smelting intermediate... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of processing non-ferrous smelting intermediate..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of processing non-ferrous smelting intermediate... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1614501

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