Production of materials with alumina and ashes from incineration of chromium tanned leather shavings: environmental and technical aspects.
J Hazard Mater
; 137(2): 1156-64, 2006 Sep 21.
Article
en En
| MEDLINE
| ID: mdl-16704896
ABSTRACT
The leather tannery industry produces a significant amount of solid and hazardous wastes. Chromium-containing wastes like tanned shavings used to be incinerated in order to recover energy. The incineration process generates ashes that must be disposed of. This paper is a report on the results of the evaluation of technological properties and environmental compatibility of products made of alumina and ashes from incinerated chrome tanned shavings. The raw materials, tannery ashes and alumina were mixed together in different proportions. The ceramic bodies were molded using a hydraulic press and fired with a heating rate of 100 K/h until 1400 degrees C for 4 h in a muffle furnace. The ceramic specimens were characterized regarding physical, mechanical and thermal properties. Leaching tests, according to Brazilian, German and Dutch regulations, were performed on ceramic bodies containing different additions of ash. Results show that the ceramic materials produced are acceptable for refractory applications.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Cromo
/
Incineración
/
Conservación de los Recursos Naturales
/
Óxido de Aluminio
Idioma:
En
Revista:
J Hazard Mater
Asunto de la revista:
SAUDE AMBIENTAL
Año:
2006
Tipo del documento:
Article
País de afiliación:
Brasil