Abstract
Abstract Pure magnesia (>96% MgO) was recovered from marine brine of high MgCl2 content using calcined dolomitic magnesite as alkali precipitating agent. High quality chrome-bearing refractories were obtained from clinkers produced by joint fine grinding and firing at 1550°C of the dried Mg(OH)2 paste with different amounts (10, 20, 35 wt. %) of common chrome ore and chemically enriched ore. The technical characteristics of the basic refractories were improved as the chrome content is increased up to 20% common ore and 35% chemically enriched ore. On substituting the common ore by the chemically enriched one the properties of the refractories were remarkably improved due to lower silicate level (about 2%) and higher chrome spinellide content. The properties of the basic refractories were correlated with their different constituent phases.
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