Batch for production of a refractory product, a process for the production of a refractory product, a refractory product as well as the use of a refractory product

Abstract

The invention concerns a batch for the production of a refractory product, a process for the production of a refractory product, a refractory product as well as the use of a refractory product.

1 . A batch for the production of a refractory product, comprising the following components:
 1.1 a base component based on alumina;   1.2 at least one of the following silicate components: at least one silicate component based on aluminium silicate or at least one silicate component based on zirconium silicate;   1.3 a carbon component.   
     
     
         2 . The batch as claimed in  claim 1 , with a base component in the form of calcined silica. 
     
     
         3 . The batch as claimed in one of the preceding claims, with at least one of the following silicate components: kaolin, metakaolin, fireclay, pyrophyllite, calcined bauxite, mullite or zircon. 
     
     
         4 . The batch as claimed in at least one of the preceding claims, with a carbon component in the form of graphite. 
     
     
         5 . A process for the production of a refractory product, comprising the following steps:
 5.1 providing a batch in accordance with at least one of the preceding claims;   5.2 melting the batch;   5.3 cooling the melt.   
     
     
         6 . A refractory product produced by a process as claimed in  claim 5 . 
     
     
         7 . A refractory product comprising the following phases in the following proportions:
 7.1 corundum: 64% to 99.5% by weight; and   7.2 total weight of SiC, Al 4 O 4 C, SiAlON, SiCAlON, Al oxynitride: 0.5% to 36% by weight.   
     
     
         8 . The refractory product as claimed in at least one of  claim 6  or  7 , with a proportion of carbon in the product of less than 2.4% by weight. 
     
     
         9 . The refractory product as claimed in at least one of  claims 6  to  8 , in the form of a solidified melt. 
     
     
         10 . Use of a refractory product as claimed in at least one of  claims 6  to  9 , as a raw material for the production of a refractory product.