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Magnesium-base composite refractory raw material and preparation method thereof
The invention discloses a magnesium-base composite refractory raw material and a preparation method thereof. The technical scheme is as follows: the preparation method comprises the following steps: preparing light-burned magnesite from 83-86% of low-grade magnesite or tailings, adding 1-3% of additive, 1-2% of metal aluminum powder, 3-5% of metal silicon powder, 3-5% of alpha-Al2O3 fine powder and 3-4% of composite binder, co-grinding, mixing, compression-moulding, baking and carrying out high-temperature nitridation firing to obtain the magnesium-base composite refractory raw material. Compared with the common high-purity magnesite refractory raw material, the magnesium-base composite refractory raw material has favorable thermal shock resistance, favorable erosion resistance and other high-temperature service properties. The composite additive is added on the basis of the existing impurity components of the low-grade magnesite and tailings, and a self-diffusion high-temperature nitrizing treatment process is utilized to change the matrix composition and liquid-phase distribution, thereby enhancing the comprehensive utilization ratio of the low-grade magnesite and tailings.
Magnesium-base composite refractory raw material and preparation method thereof
The invention discloses a magnesium-base composite refractory raw material and a preparation method thereof. The technical scheme is as follows: the preparation method comprises the following steps: preparing light-burned magnesite from 83-86% of low-grade magnesite or tailings, adding 1-3% of additive, 1-2% of metal aluminum powder, 3-5% of metal silicon powder, 3-5% of alpha-Al2O3 fine powder and 3-4% of composite binder, co-grinding, mixing, compression-moulding, baking and carrying out high-temperature nitridation firing to obtain the magnesium-base composite refractory raw material. Compared with the common high-purity magnesite refractory raw material, the magnesium-base composite refractory raw material has favorable thermal shock resistance, favorable erosion resistance and other high-temperature service properties. The composite additive is added on the basis of the existing impurity components of the low-grade magnesite and tailings, and a self-diffusion high-temperature nitrizing treatment process is utilized to change the matrix composition and liquid-phase distribution, thereby enhancing the comprehensive utilization ratio of the low-grade magnesite and tailings.
Magnesium-base composite refractory raw material and preparation method thereof
LIU XIN (Autor:in) / QU DIANLI (Autor:in) / WANG LIN (Autor:in) / ZHENG JICHUN (Autor:in) / PENG XIAOWEN (Autor:in) / ZHANG SHENGNAN (Autor:in) / JIANG JINFENG (Autor:in)
16.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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