摘要:
Provided is an aluminum oxycarbide composition production method capable of increasing a yield of Al4O4C while reducing a content rate of Al4C3 and achieving high productivity, and an aluminum oxycarbide composition. The method comprises: preparing a blend substantially consisting of a carbon-raw material having a mean particle diameter of 0.5 mm or less and an alumina-raw material having a mean particle diameter of 350 μm or less, wherein a mole ratio of the carbon-raw material to the alumina-raw material (C/Al2O3) is in a range of 0.8 to 2.0; homogeneously mixing the blend to allow a variation in C component to fall within ±10%; and melting the obtained mixture in an arc furnace at 1850° C. or more.
摘要翻译:本发明提供一种能够提高Al 4 O 4的收率,同时降低Al 4 C 3的含有率,实现高生产率的碳酸氢铝组合物的制造方法以及碳酸氢铝组合物。 该方法包括:制备基本上由平均粒径为0.5mm以下的碳原料和平均粒径为350μm以下的氧化铝 - 原料组成的混合物,其中,碳 - 氧化铝 - 原料(C / Al 2 O 3)的原料在0.8〜2.0的范围内; 均匀混合共混物以使C成分的变化降至±10%以内; 并在1850℃或更高的电弧炉中熔化获得的混合物。
摘要:
Disclosed is a method of producing a plate brick, which comprises: adding an organic binder to a refractory raw material mixture containing aluminum and/or an aluminum alloy; kneading them; forming the kneaded mixture into a shaped body; and burning the shaped body in a nitrogen gas atmosphere at a temperature of 1000 to 1400° C., wherein: when a temperature of a furnace atmosphere is 300° C. or more, the atmosphere is set to a nitrogen gas atmosphere; and when the temperature of the furnace atmosphere is 1000° C. or more, an oxygen gas concentration in the atmosphere is maintained at 100 volume ppm or less, and a sum of a carbon monoxide gas concentration and a carbon dioxide gas concentration is maintained at 1.0 volume % or less. This makes it possible to form a large amount of fine and uniform aluminum nitride in a plate brick to prevent microstructural degradation due to hydration caused by formation of aluminum carbide and suppress oxidation of a carbon bond so as to improve surface-roughening resistance.
摘要:
It is an object to provide an aluminum oxycarbide composition capable of suppressing oxidation of Al4O4C during use to maintain advantageous effects of Al4O4C for a long time. In an aluminum oxycarbide composition comprising Al4O4C crystals, the Al4O4C crystals have an average diameter of 20 μm or more, based on an assumption that a cross-sectional area of each Al4O4C crystal during observation of the aluminum oxycarbide composition in an arbitrary cross-section thereof is converted into a diameter of a circle having the same area as the cross-sectional area. This aluminum oxycarbide composition can be produced by subjecting a carbon-based raw material and an alumina-based raw material to melting in an arc furnace and then cooling within the arc furnace.
摘要翻译:本发明的目的是提供一种能够在使用过程中抑制Al 4 O 4 C氧化的碳酸氢铝组合物,以长期保持Al 4 O 4 C的有利效果。 在包含Al 4 O 4 C晶体的碳酸氢铝组合物中,Al 4 O 4 C晶体的平均直径为20μm以上,基于在任意横截面观察碳酸氢铝组合物期间每个Al 4 O 4 C晶体的横截面面积 被转换为具有与横截面积相同的面积的圆的直径。 该碳酸氢铝组合物可以通过使碳类原料和氧化铝类原料在电弧炉中熔融,然后在电弧炉内冷却来制造。
摘要:
Provided is an aluminum oxycarbide composition production method capable of increasing a yield of Al4O4C while reducing a content rate of Al4C3 and achieving high productivity, and an aluminum oxycarbide composition. The method comprises: preparing a blend substantially consisting of a carbon-raw material having a mean particle diameter of 0.5 mm or less and an alumina-raw material having a mean particle diameter of 350 μm or less, wherein a mole ratio of the carbon-raw material to the alumina-raw material (C/Al2O3) is in a range of 0.8 to 2.0; homogeneously mixing the blend to allow a variation in C component to fall within ±10%; and melting the obtained mixture in an arc furnace at 1850° C. or more.
摘要翻译:本发明提供一种能够提高Al 4 O 4的收率,同时降低Al 4 C 3的含有率,实现高生产率的碳酸氢铝组合物的制造方法以及碳酸氢铝组合物。 该方法包括:制备基本上由平均粒径为0.5mm以下的碳原料和平均粒径为350μm以下的氧化铝 - 原料组成的混合物,其中, 氧化铝 - 原料(C / Al 2 O 3)的原料在0.8〜2.0的范围内; 均匀混合共混物以使C成分的变化降至±10%以内; 并在1850℃或更高的电弧炉中熔化获得的混合物。
摘要:
It is an object to provide an aluminum oxycarbide composition capable of suppressing oxidation of Al4O4C during use to maintain advantageous effects of Al4O4C for a long time. In an aluminum oxycarbide composition comprising Al4O4C crystals, the Al4O4C crystals have an average diameter of 20 μm or more, based on an assumption that a cross-sectional area of each Al4O4C crystal during observation of the aluminum oxycarbide composition in an arbitrary cross-section thereof is converted into a diameter of a circle having the same area as the cross-sectional area. This aluminum oxycarbide composition can be produced by subjecting a carbon-based raw material and an alumina-based raw material to melting in an arc furnace and then cooling within the arc furnace.
摘要翻译:本发明的目的是提供一种能够在使用过程中抑制Al 4 O 4 C氧化的碳酸氢铝组合物,以长期保持Al 4 O 4 C的有利效果。 在包含Al 4 O 4 C晶体的碳氧化铝组合物中,Al 4 O 4 C晶体的平均直径为20μm以上,基于在任意截面观察碳酸氢铝组合物期间每个Al 4 O 4 C晶体的横截面面积 被转换为具有与横截面积相同的面积的圆的直径。 该碳酸氢铝组合物可以通过使碳类原料和氧化铝类原料在电弧炉中熔融,然后在电弧炉内冷却来制造。
摘要:
Provided is a zirconia-mullite refractory raw material which is less likely to undergo alternation and microstructural degradation under high-temperature conditions, and low in thermal expansion rate, so as to have thermal shock resistance and corrosion resistance. The zirconia-mullite refractory raw material comprises crystalline zirconia and mullite as primary components, with the remainder being corundum and/or a matrix glass, wherein the crystalline zirconia includes a eutectic zirconia crystal having a grain size of 1.0 μm or less, and has a maximum grain size of 30 μm or less, and the matrix glass is contained in an amount of 5 mass % or less. The zirconia-mullite refractory raw material has a chemical composition comprising 30 to 55 mass % of ZrO2, 30 to 55 mass % of Al2O3 and 10 to 25 mass % of SiO2, wherein each of the chemical components falls within a primary phase region of ZrO2 in an Al2O3—ZrO2—SiO2 system phase diagram.
摘要:
Disclosed is a method of producing a plate brick, which comprises: adding an organic binder to a refractory raw material mixture containing aluminum and/or an aluminum alloy; kneading them; forming the kneaded mixture into a shaped body; and burning the shaped body in a nitrogen gas atmosphere at a temperature of 1000 to 1400° C., wherein: when a temperature of a furnace atmosphere is 300° C. or more, the atmosphere is set to a nitrogen gas atmosphere; and when the temperature of the furnace atmosphere is 1000° C. or more, an oxygen gas concentration in the atmosphere is maintained at 100 volume ppm or less, and a sum of a carbon monoxide gas concentration and a carbon dioxide gas concentration is maintained at 1.0 volume % or less. This makes it possible to form a large amount of fine and uniform aluminum nitride in a plate brick to prevent microstructural degradation due to hydration caused by formation of aluminum carbide and suppress oxidation of a carbon bond so as to improve surface-roughening resistance.
摘要:
Provided is a zirconia-mullite refractory raw material which is less likely to undergo alternation and microstructural degradation under high-temperature conditions, and low in thermal expansion rate, so as to have thermal shock resistance and corrosion resistance. The zirconia-mullite refractory raw material comprises crystalline zirconia and mullite as primary components, with the remainder being corundum and/or a matrix glass, wherein the crystalline zirconia includes a eutectic zirconia crystal having a grain size of 1.0 μm or less, and has a maximum grain size of 30 μm or less, and the matrix glass is contained in an amount of 5 mass % or less. The zirconia-mullite refractory raw material has a chemical composition comprising 30 to 55 mass % of ZrO2, 30 to 55 mass % of Al2O3 and 10 to 25 mass % of SiO2, wherein each of the chemical components falls within a primary phase region of ZrO2 in an Al2O3—ZrO2—SiO2 system phase diagram.