Magnesite-rich mining tailings as a raw material for refractory ceramics – microstructural and thermal analysis

Estonian Academy of Sciences. Proceedings

Marjaana Karhu¹ 

关键词: mining tailings;    refractory ceramics;    magnesium aluminate spinel;    value from waste.;   

DOI  :  10.3176/proc.2019.2.05

学科分类：化学（综合）

来源: Teaduste Akadeemia Kirjastus

【 摘 要 】

In this paper, we present results of a study about the possibilities of utilizing talc ore mining tailings as a refractory rawmaterial aiming at magnesium aluminate MgAl2O4 spinel composition. The mine tailings are rich in magnesite but contain alsoother minerals such as talc, chlorite, dolomite, and iron sulphides. As alumina source for spinel synthesis, we studied also anothersecondary raw material, an aluminium hydroxide precipitate, a by-product generated from the pickling process of aluminiumanodizing. The goal of this paper is to study and compare a pure Mg–Al–O system and the corresponding Mg–Al–O system withsome impurities. The formed phase and microstructures were examined by XRD, FESEM, and EDS studies. The thermalbehaviour was studied using thermogravimetric analysis.

【 授权许可】

CC BY-NC