Titre : |
Using ashes from incineration of chromium sulphate tanned leather scrap - Part 1 : Characterization of ashes and chromium extraction |
Type de document : |
texte imprimé |
Année de publication : |
2000 |
Article en page(s) : |
p. 271-275 |
Note générale : |
Bibliogr. |
Langues : |
Anglais (eng) |
Catégories : |
Caractérisation Cendres -- Teneur en chrome Chrome hexavalent Cuirs et peaux -- Déchets -- Recyclage Extraction (chimie) Incinération Récupération (Déchets, etc.)
|
Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
Résumé : |
Chromium is the basis of leather manufacture and its extractable reserves are limited in distribution, mainly in South Africa, Zimbabwe and ex-USSR countries. Almost 20% of the metal is used by the chemical industry where one third of it goes into leather production as chromium sulphate tanning agent.
The European Union depends on chromium imports.
After burning leather scrap—tanned with chromium sulphate-the resulting very rich chromium ashes may present chromium (VI) in such a concentration that it becomes a hazardous waste and needs careful handling.
Thus, both economic and environmental reasons suggest the use of these ashes. This paper mainly summarizes some of the conclusions of the research carried out during the execution of CRAFT project BRST-CT96-5085, where leather incineration ashes generated by two different pilot combustion systems, respectively a fixed grill incinerator (FGI) and a fluidized bed incinerator (FBI) were characterized and chromium was leached using a mixed pyrometallurgical and hydrometallurgical route as well as a full hydrometallurgical route. |
Note de contenu : |
- EXPERIMENTAL PROCEDURES : Methods and procedure
- RESULTS AND DISCUSSION : Characteristics of ashes - Chromium extraction from ashes by a hydrometallurgical route - Chromium extraction from ashes by a pyrometallurgical and hydrometallurgical route - Silica leaching from the ashes
- Table 1 : XRF results of the FGI and FBI ash analyses
- Table 2 : Influence of acid concentration, grinding, temperature and time on chromium recovered from FGI ashes |
En ligne : |
https://drive.google.com/file/d/1CbRiDpse_L8eNNFYuP0Qvf6_lsRNlsmM/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40818 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 84, N° 6 (11-12/2000) . - p. 271-275