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Preparing method for high-purity hercynite
The invention belongs to the technical field of refractory materials and particularly relates to a preparing method for high-purity hercynite approximate to theoretical formation. The content of Fe2+ in hercynite is larger than 99%. The preparing method comprises the steps that after a ferrum-containing compound and an aluminum-containing compound are mixed according to the molar ratio of FeO to AlO3:1:1, pressed and formed, a formed sample is embedded into metallic ferrum, temperature is raised to 1100 DEG C-1700 DEG C, and after heat preserving and cooling are carried out, hercynite approximate to theoretical formation is obtained. The preparing method has the advantages that redox reactions among iron oxides are utilized to generate ferrous oxide, and under the circumstance that zero-valent iron is enough, balanced ferrous oxide (wustite) can exist stably; weak reducing atmosphere does not need to be controlled, and the ferrous oxide and aluminum oxide react on the high-temperature condition to synthesize high-purity hercynite. By means of the preparing method, high-purity hercynite approximate to theoretical formation can be prepared, the technology is simple, and the yield is high.
Preparing method for high-purity hercynite
The invention belongs to the technical field of refractory materials and particularly relates to a preparing method for high-purity hercynite approximate to theoretical formation. The content of Fe2+ in hercynite is larger than 99%. The preparing method comprises the steps that after a ferrum-containing compound and an aluminum-containing compound are mixed according to the molar ratio of FeO to AlO3:1:1, pressed and formed, a formed sample is embedded into metallic ferrum, temperature is raised to 1100 DEG C-1700 DEG C, and after heat preserving and cooling are carried out, hercynite approximate to theoretical formation is obtained. The preparing method has the advantages that redox reactions among iron oxides are utilized to generate ferrous oxide, and under the circumstance that zero-valent iron is enough, balanced ferrous oxide (wustite) can exist stably; weak reducing atmosphere does not need to be controlled, and the ferrous oxide and aluminum oxide react on the high-temperature condition to synthesize high-purity hercynite. By means of the preparing method, high-purity hercynite approximate to theoretical formation can be prepared, the technology is simple, and the yield is high.
Preparing method for high-purity hercynite
CHEN JUNHONG (author) / LIU DONGFANG (author) / YAN MINGWEI (author) / SU JINDONG (author) / LI BIN (author) / MI WENJUN (author) / CHEN HAIYANG (author) / ZHAI FAMIN (author) / LI TONG (author) / LIU MENG (author)
2015-12-30
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
Artificial sintering synthesis method for low-heat conduction and high purity hercynite
| European Patent Office | 2015