US 12,486,201 B2
Dry material mixture for a backfill, preferably a refractory concrete backfill, for producing a heavy-clay refractory non-basic product, refractory concrete backfill and such a product, method for producing same, lining, and industrial furnace, channel transport system or mobile transport vessel
Steffen Rollmann, Plaidt (DE); Bertram Kesselheim, Bad Hönningen (DE); and Jasper Neese, Göttingen (DE)
Assigned to Refratechnik Holding GmbH, Munich (DE)
Appl. No. 18/012,249
Filed by Refratechnik Holding GmbH, Munich (DE)
PCT Filed Jul. 1, 2021, PCT No. PCT/EP2021/068257
§ 371(c)(1), (2) Date Dec. 22, 2022,
PCT Pub. No. WO2022/003132, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 10 2020 208 242.1 (DE), filed on Jul. 1, 2020.
Prior Publication US 2023/0312418 A1, Oct. 5, 2023
Int. Cl. C04B 22/16 (2006.01); C04B 14/30 (2006.01); C04B 28/24 (2006.01); C04B 40/00 (2006.01); C04B 103/61 (2006.01); C04B 111/00 (2006.01); C04B 111/28 (2006.01); F27D 1/00 (2006.01)
CPC C04B 22/16 (2013.01) [C04B 14/303 (2013.01); C04B 28/24 (2013.01); C04B 40/0042 (2013.01); F27D 1/0006 (2013.01); C04B 2103/61 (2013.01); C04B 2111/00879 (2013.01); C04B 2111/28 (2013.01)] 30 Claims
 
1. A dry substance mixture for a batch batch for the production of a coarse ceramic, refractory, unfired, shaped or unshaped, non-basic product, the dry substance mixture comprising:
a) coarse- and fine-grained aggregate including a coarse-grain fraction and a fine-grain fraction of at least one refractory, non-basic aggregate material, the coarse-grain fraction and the fine-grain fraction having a grain size >200 μm,
b) meal-grained aggregate of at least one refractory, non-basic aggregate with a grain size ≤200 μm, wherein the meal-grained aggregate comprise an Al2O3 granular material, and
c) at least one anti-corrosion agent to improve corrosion resistance to molten aluminum,
wherein the anticorrosive agent comprises at least one first dry, meal-grained phosphate having a softening point, determined by heating microscopy according to DIN ISO 540:2008, of 600 to 1400° C., and at least a second dry, meal-grained phosphate having a softening point, determined by heating microscopy according to DIN ISO 540:2008, of >1600° C., the two phosphates each having a solubility in water at 20° C. according to DIN EN 15216:2008-1 of <50 g/l, and
wherein the at least one first phosphate is calcium dihydrogen phosphate (Ca(H2PO4)2), magnesium dihydrogen phosphate (Mg(H2PO4)2), calcium hydrogen phosphate (CaHPO4) or magnesium hydrogen phosphate (MgHPO4) or calcium hydrogen phosphate dihydrate (CaHPO4·2 H2O) or magnesium hydrogen phosphate trihydrate (MgHPO4·3 H2O), and
wherein the at least one second phosphate is aluminum phosphate (AlPO4).