MIXTURE FOR REFRACTORY PURPOSES

• Main Authors: SEVCIK VACLAV, SKVARA FRANTISEK DOC. RNDRSC
• Format: Patent
• Language: Czech; English
• Published: 15.04.1998
• Edition: 6
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF NATURAL STONE

Směs pro žáruvzdorné účely obsahující 22 až 94,999 % hmotn. mletého křemičitanového slínku portlandského a/nebo bílého cementu, vztaženo na hmotnost směsi a 5 až 77 % hmotn. další látky pro přípravu žáruvzdorných hmot, vztaženo na hmotnost směsi, vybrané ze skupiny tvořené jemně mletou metalurgickou struskou, vysokopecní granulovanou struskou, popílkem, produkty kalcinace alumosilikátů, pucolány, žáruvzdorným ostřivem a/nebo jemně mletým plnivem vybraným ze skupiny látek tvořené šamotem, dinasem, páleným lupkem a korundem, a dále 1 až 10 % hm., vztaženo na hmotnost směsi, látek na bázi Al.sub.2.n.O.sub.3.n., spočívá v tom, že portlandský slínek a/nebo bílý cement je prostý sádrovce a směs obsahuje reaktivní látky na bázi AL.sub.2.n.O.sub.3.n., tvořené Al.sub.2.n.O.sub.3.n., hxdratovaným Al.sub.2.n.O.sub.3.n..nH.sub.2.n.O, a/nebo bauxitem, a/nebo lateritem s velikostí částic menší než 150 .mi.m v množství 1 až 30 % hm., vztaženo na hmotnost směsi slínku portlandského cementu a/nebo bíléŕ This mixture for refractory purposes containing 22 to 93.6% by weight of milled silicate Portland clinker and/or white cement according to the weight of the mixture, and 5 to 77% by weight, according to the weight of the mixture and other substances for preparing refractory materials selected from the group consisting of finely ground metallurgical clinker, blast-furnace granulated clinker, ash, products of the calcination of aluminosilicates, pozzolans, refractory grog and/or a finely ground filling selected from the group of substances consisting of burnt clay, Dinas clay, burnt mud rock and corundum, and also 1 to 10% by weight, according to the weight of a mixture of substances based on Al2O3, is based on the fact that Portland clinker and/or white cement is free of plaster stone and the mixture contains 1 to 30% by weight of reactive substances based on Al2O3 consisting of Al2O3, hydrated Al2O3.nH2O and/or bauxite and/or laterite with a particle size below 150 micrometers according to the weight of the mixture of the Portland clinker and/or white cement with reactive substances based on Al2O3, and 0.001 to 2% by weight of milling ingredients according to the weight of the mixture of Portland clinker and/or white cement with reactive substances based on Al2O3. In addition, it may contain 0.1 to 5% by weight, according to the total mixture, of the hydrolysable salt of an alkaline metal selected from the group consisting of carbonates, hydrogen carbonates and silicates of alkaline metals, and 0.1 to 5% by weight, according to the total mixture, of a plasticizing additive based on anionic a tenzide stable in a medium with a pH greater than 7 selected from the group of substances consisting of ligninsulphonates of alkaline metals, sulphonated lignin, sulphonated polyphenolate, naphthalene sulphonate, the sulphonated product of the condensation of melamine with formaldehyde, and/or 0.1 to 20% by weight of SiO2 fly ash from metallurgical production, and/or 0.1 to 5% by weight of the setting regulators of gypsum-free cements selected from the group of substances consisting of organic hydroxyacids, boric acid, organosilicon compounds or phosphates.