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Magnesium spinel refractory material high in thermal shock resistance and manufacturing method thereof
The invention relates to a magnesium spinel refractory material high in thermal shock resistance. According to the physical and chemical indicators of the magnesium spinel refractory material high in thermal shock resistance, MgO>=83%, Al2O3=12%-14%, Fe2O3<=1.0%, and SiO2<=1.2%; the volume density is 2.90-3.00g/cm<3>, the apparent porosity is smaller than or equal to 18%, the cold compressive strength is equal to or higher than 60MPa, the refractoriness under loads is equal to or higher than 1700 DEG C, and the thermal shock stability is equal to or higher than 16 times. The magnesium spinel refractory material high in thermal shock resistance is composed of, by weight, 20-30 parts of high-purity magnesia with the particle size being equal to or larger than 2mm and smaller than 4 mm, 8-12 parts of high-purity magnesia with the particle size being equal to or larger than 1 mm and smaller than 2 mm, 11-15 parts of high-purity magnesia with the particle size being equal to or larger than 0 mm and smaller than 1 mm, 17-21 parts of 200-mesh high-purity magnesia, 6-9 parts of fused magnesia with the particle size being equal to or larger than 0 mm and smaller than 1 mm, 6-9 parts of 200-mesh fused magnesia, 3-7 parts of fused magnesium aluminate spinel with the particle size being equal to or larger than 2 mm and smaller than 4 mm, 3-7 parts of fused magnesium aluminate spinel with the particle size being equal to or larger than 1 mm and smaller than 2 mm, 3-7 parts of fused magnesium aluminate spinel with the particle size being equal to or larger than 0 mm and smaller than 1 mm, 2-5 parts of 200-mesh alpha-Al2O3 powder and 2-5 parts of binding agent. The service life of the refractory material made of the composite materials reaches the expected service life which is over five years when the refractory material is used on lime kilns, and the service life reaches 1000 times when the refractory material is used for grooves in the middle and upper portion of an HR furnace.
Magnesium spinel refractory material high in thermal shock resistance and manufacturing method thereof
The invention relates to a magnesium spinel refractory material high in thermal shock resistance. According to the physical and chemical indicators of the magnesium spinel refractory material high in thermal shock resistance, MgO>=83%, Al2O3=12%-14%, Fe2O3<=1.0%, and SiO2<=1.2%; the volume density is 2.90-3.00g/cm<3>, the apparent porosity is smaller than or equal to 18%, the cold compressive strength is equal to or higher than 60MPa, the refractoriness under loads is equal to or higher than 1700 DEG C, and the thermal shock stability is equal to or higher than 16 times. The magnesium spinel refractory material high in thermal shock resistance is composed of, by weight, 20-30 parts of high-purity magnesia with the particle size being equal to or larger than 2mm and smaller than 4 mm, 8-12 parts of high-purity magnesia with the particle size being equal to or larger than 1 mm and smaller than 2 mm, 11-15 parts of high-purity magnesia with the particle size being equal to or larger than 0 mm and smaller than 1 mm, 17-21 parts of 200-mesh high-purity magnesia, 6-9 parts of fused magnesia with the particle size being equal to or larger than 0 mm and smaller than 1 mm, 6-9 parts of 200-mesh fused magnesia, 3-7 parts of fused magnesium aluminate spinel with the particle size being equal to or larger than 2 mm and smaller than 4 mm, 3-7 parts of fused magnesium aluminate spinel with the particle size being equal to or larger than 1 mm and smaller than 2 mm, 3-7 parts of fused magnesium aluminate spinel with the particle size being equal to or larger than 0 mm and smaller than 1 mm, 2-5 parts of 200-mesh alpha-Al2O3 powder and 2-5 parts of binding agent. The service life of the refractory material made of the composite materials reaches the expected service life which is over five years when the refractory material is used on lime kilns, and the service life reaches 1000 times when the refractory material is used for grooves in the middle and upper portion of an HR furnace.
Magnesium spinel refractory material high in thermal shock resistance and manufacturing method thereof
WANG XINJIE (author) / WANG YONG (author) / CHEN DONGMING (author) / ZHANG YIXIAN (author) / WANG XU (author) / YIN BIN (author) / YANG JINGBIAO (author) / YUAN GUANGXIN (author) / LI YANLI (author) / GONG HUAZE (author)
2015-10-07
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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