Estudo do efeito da quantidade de óxido de ferro em cinzas pesadas de carvão mineral na obtenção de vitrocerâmicos

Química Nova

Cláudia Terezinha Kniess²  Nivaldo Cabral Kuhnen²  Humberto Gracher Riella²  Etney Neves¹  Cristina Doneda Gomes De Borba¹ 

[1] ,Universidade Federal de Santa Catarina Departamento de Engenharia Química e Engenharia de Alimentos Florianópolis SC

关键词: bottom ash;    glass ceramic;    magnetic iron removing;   

DOI  :  10.1590/S0100-40422002000600008

来源: SciELO

【 摘 要 】

Bottom ash has been used as raw material to glass and glass ceramic production because it is a source of SiO2 and Al2O3. However, the high concentration of iron (about 10% wt.) difficulty the control of the nucleation and the crystallization processes. The iron content was reduced by magnetic process, where the magnetite phase was mainly removed. In order to compare glass ceramics obtained from original and low iron bottom ashes, microstructural and dilatometric characterizations were performed.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License