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Technology of producing high purity magnesium oxide from low-grade magnesite
The invention relates to a technology of producing magnesium oxide, and especially relates to a technology of producing high purity magnesium oxide from low-grade magnesite. The high purity magnesium oxide can be prepared from low-grade magnesite through steps of silicon removing by reverse floatation, burning by an ammonia process, leaching, and high temperature calcining. The technology has the following advantages: the quartz and silicates in ores are effectively removed through the reverse floatation; the calcium-containing mineral substances in ores are converted into soluble calcium salts through the ammonia process burning; in the leaching step, the mineral substances containing calcium, iron, and aluminum are removed; and after the high temperature calcining step, high purity magnesium oxide is obtained, wherein the magnesium oxide content is greater than 98%, and the density is larger than 3.4 g/cm3.
Technology of producing high purity magnesium oxide from low-grade magnesite
The invention relates to a technology of producing magnesium oxide, and especially relates to a technology of producing high purity magnesium oxide from low-grade magnesite. The high purity magnesium oxide can be prepared from low-grade magnesite through steps of silicon removing by reverse floatation, burning by an ammonia process, leaching, and high temperature calcining. The technology has the following advantages: the quartz and silicates in ores are effectively removed through the reverse floatation; the calcium-containing mineral substances in ores are converted into soluble calcium salts through the ammonia process burning; in the leaching step, the mineral substances containing calcium, iron, and aluminum are removed; and after the high temperature calcining step, high purity magnesium oxide is obtained, wherein the magnesium oxide content is greater than 98%, and the density is larger than 3.4 g/cm3.
Technology of producing high purity magnesium oxide from low-grade magnesite
WANG PENG (Autor:in) / CHEN GUOHUA (Autor:in)
15.04.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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