Method for producing high-purity magnesium oxide from waste refractory material through eco-friendly hydrometallurgical application process and magnesium oxide produced thereby

Abstract

The present invention relates to a method for producing high-purity magnesium oxide from a waste refractory material through an eco-friendly hydrometallurgical application process and magnesium oxide produced thereby, wherein the method comprises: a step of subjecting a magnesium-containing waste refractory material to leaching, and separating a leachate and residues through solid-liquid separation (S10); an impurity purification and leaching step for the leachate (S20); a step of powdering the leachate subjected to the impurity purification and leaching step to prepare a magnesium-containing powder (S30); a step of heat-treating the magnesium-containing powder to prepare magnesium oxide (S40); and a step of washing the heat-treated magnesium oxide to obtain high-purity magnesium oxide (S50).

Dependencies are inferred from the claim text.