A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
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 (author) / CHEN GUOHUA (author)
2015-04-15
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2021
Method for producing high-volume-density high-purity sintered magnesia from low-grade magnesite
| European Patent Office | 2020
Method for preparing high-activity magnesium oxide based on low-grade magnesite
| European Patent Office | 2022
Method for preparing high-purity flaky magnesium hydroxide by hydrating microcrystalline magnesite
| European Patent Office | 2023
| European Patent Office | 2024