Abstract:
The present invention relates to a porous aggregate, comprising Al 2 O 3 , SiO 2 and optionally Fe 2 O 3 , having a d 50 of equivalent pore diameter between 1 μm or more and 50 μm or below and a total porosity between 20% and 60%, for use in the formation of monolithic refractories. Also part of the invention is a method of formation for said aggregates, their use in the formation of monolithic refractories and monolithic refractories comprising such aggregates.
Abstract translation:本发明涉及一种多孔骨料,其包含Al 2 O 3,SiO 2和任选的Fe 2 O 3,其具有等效孔径在1μm以上至50μm以下的总孔隙率为20%至60%的d 50,用于形成 的单片耐火材料。 本发明的另一部分是所述聚集体的形成方法,它们在形成整体耐火材料中的用途以及包含这种聚集体的整体耐火材料。
Abstract:
The present invention relates to particulate compositions for use in alumina-magnesia spinel forming dry vibratable mixtures, the composition comprising, based on the total weight of the particulate composition, 95 to 99.9 wt.-% of a mixture of particulate Al 2 O 3 and particulate MgO; and 0.1 to 5 wt.-% binding agent; wherein at least a portion of the particles of said mixture of particulate Al 2 O 3 and particulate MgO is present in the particulate composition as a coating of particles on the surface of other particles. The invention further relates to methods of production of said compositions as well as their uses.
Abstract translation:本发明涉及用于氧化铝 - 氧化镁尖晶石形成干式可振动混合物的颗粒组合物,该组合物基于颗粒组合物的总重量包含95-99.9重量%的Al2O3和颗粒MgO的混合物; 和0.1至5重量%的粘合剂; 其中所述颗粒状Al 2 O 3和颗粒状MgO的所述混合物的至少一部分颗粒作为其它颗粒表面上的颗粒涂层存在于所述颗粒组合物中。 本发明还涉及所述组合物的生产方法及其用途。
Abstract:
The present invention relates to methods for forming monolithic refractory compositions, comprising the steps of providing a particulate refractory composition comprising 2 to 90 mass-% alumina, aluminosilicate or mixtures thereof, 2 to 70 mass-% silicon carbide, 2 to 10 mass-% carbon; 1 to 10 mass-% Si powder, 1 to 3 mass-% microsilica, up to 5 mass-% ferrosilicon, and optionally up to 5 mass-% cement, adding an appropriate amount of water to the particulate refractory composition to form a uniform mixture, installing said uniform mixture and allowing it to set in such location and arrangement where the monolithic refractory composition is required, and heat-treating said set mixture at a temperature no higher than 1200°C under normal atmospheric conditions to form a monolithic composition, as well as optionally heat-treating the obtained monolithic composition to form silicon carbide whiskers within the monolithic refractory composition. Also part of the present invention are compositions formed according to the method of the invention.