Use of a batch to produce a granulated-SiC-based refractory product, ceramically fired in a nitrogen atmosphere, the granules of which are sintered together by way of a sinter phase containing at least one silicon nitride and at least one boron compound and additionally SiAlON, characterised in that the batch comprises at least the following constituents: - 60 to 89.4, in particular 78 to 81 wt.% granulated SiC with a conventional range of particle sizes of between 0 and 5 mm, in particular between 0 and 3 mm, - 10 to 25, in particular 14 to 16 wt.% Si powder, - 0.1 to 2, in particular 0.3 to 0.4 wt.% boron component, calculated as boron from the at least one boron compound or the boron compounds, - 0.5 to 13, in particular 4.7 to 5.6 wt.% SiAlON-forming Al component, calculated as Al 2 O 3 from an Al and/or Al 2 O 3 and/or Al 2 O 3 /SiO 2 product, wherein a shaped article is shaped from the batch and the shaped article is ceramically fired at temperatures between 1300 °C and 1500 °C, in particular between 1400 °C and 1450 °C, in a nitrogen-containing atmosphere in such a way that a sinter phase is formed, sintering the SiC granules together, said sinter phase containing, in addition to at least one boron compound, silicon nitride or silicon nitride and silicon oxynitride, formed from the Si powder, and SiAlON,formed from the Si powder and the Al component, and in the sinter phase, irrespective of the boron compound, SiAION and/or Si 3 N 4 or Si 3 N 4 plus SiAION predominates quantitatively over Si 2 ON 2. the batch comprises at least the following constituents: - 60 to 89.4, in particular 78 to 81 wt.% granulated SiC with a conventional range of particle sizes of between 0 and 5 mm, in particular between 0 and 3 mm, - 10 to 25, in particular 14 to 16 wt.% Si powder, - 0.1 to 2, in particular 0.3 to 0.4 wt.% boron component, calculated as boron from the at least one boron compound or the boron compounds, - 0.5 to 13, in particular 4.7 to 5.6 wt.% SiAlON-forming Al component, calculated as Al 2 O 3 from an Al and/or Al 2 O 3 and/or Al 2 O 3 /SiO 2 product, - 60 to 89.4, in particular 78 to 81 wt.% granulated SiC with a conventional range of particle sizes of between 0 and 5 mm, in particular between 0 and 3 mm, - 10 to 25, in particular 14 to 16 wt.% Si powder, - 0.1 to 2, in particular 0.3 to 0.4 wt.% boron component, calculated as boron from the at least one boron compound or the boron compounds, - 0.5 to 13, in particular 4.7 to 5.6 wt.% SiAlON-forming Al component, calculated as Al 2 O 3 from an Al and/or Al 2 O 3 and/or Al 2 O 3 /SiO 2 product, wherein a shaped article is shaped from the batch and the shaped article is ceramically fired at temperatures between 1300 °C and 1500 °C, in particular between 1400 °C and 1450 °C, in a nitrogen-containing atmosphere in such a way that a sinter phase is formed, sintering the SiC granules together, said sinter phase containing, in addition to at least one boron compound, silicon nitride or silicon nitride and silicon oxynitride, formed from the Si powder, and SiAlON,formed from the Si powder and the Al component, and in the sinter phase, irrespective of the boron compound, SiAION and/or Si 3 N 4 or Si 3 N 4 plus SiAION predominates quantitatively over Si 2 ON 2.