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METHOD FOR PRODUCING POROUS SINTERED MAGNESIA, A CHARGE FOR PRODUCING A COARSE-CERAMIC FIREPROOF PRODUCT WITH A GRANULAR MATERIAL FROM SINTERED MAGNESIA, SUCH PRODUCTS, AS WELL AS METHODS FOR PRODUCING THEM, LINING OF AN INDUSTRIAL FURNACE AND AN INDUSTRIAL FURNACE
METHOD FOR PRODUCING POROUS SINTERED MAGNESIA, A CHARGE FOR PRODUCING A COARSE-CERAMIC FIREPROOF PRODUCT WITH A GRANULAR MATERIAL FROM SINTERED MAGNESIA, SUCH PRODUCTS, AS WELL AS METHODS FOR PRODUCING THEM, LINING OF AN INDUSTRIAL FURNACE AND AN INDUSTRIAL FURNACE
FIELD: metallurgy.;SUBSTANCE: present invention relates to fireproof materials based on magnesium oxide. According to the method for producing granular material, sintered magnesia is produced by sintering pressed granules from MgO powder, preferably from caustic MgO powder, and by subsequent mechanical grinding of the pressed granules. Sintering is carried out at a temperature below 1600°C in such a way that the granular material has a total porosity according to DIN EN 993-1:1195-04 and DIN EN 993-18:1999-01 from 15 to 38 vol. %, preferably from 20 to 38 vol. %. The charge for producing a coarse-ceramic refractory molded or unmolded product contains the specified porous sintered material. Products obtained from the charge are used in the internal lining and/or masonry without facing a large-volume industrial furnace, for example, a furnace for firing magnesia and dolomite, a furnace in non-ferrous metallurgy, a cement furnace, a rotating furnace for firing lime, a steelmaking furnace. ;EFFECT: technical result of the invention is an increase in compressive strength for the charge when obtaining products with high porosity and low thermal conductivity with low alkali infiltration.;52 cl, 3 dwg, 13 tbl
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机译:田间:冶金。;物质:本发明涉及基于氧化镁的防火材料。根据生产颗粒材料的方法,通过从MgO粉末,优选苛性颗粒粉末烧结压制颗粒,并通过随后的压制颗粒的机械研磨来制备烧结氧化镁。烧结在低于1600℃的温度下,使得粒状材料具有根据DIN EN 993-1:1195-04和DIN EN 993-18:1999-01的总孔隙率,从15至38 Vol。 %,优选20至38体积。 %。制造粗陶瓷耐火模塑或未折叠产物的电荷含有指定的多孔烧结材料。从电荷中获得的产品用于内衬和/或砌体,而不面向大批量的工业炉,例如,用于烧制氧化镁和白云岩的炉,有色金属冶金,水泥炉,旋转炉中的炉子用于烧制石灰,炼钢炉。 ;效果:当获得具有高孔隙率和低碱性渗透的产品时,本发明的技术结果是电荷的抗压强度增加。; 52 Cl,3 dwg,13 tbl
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