FIRE-PROOF SOLDIER BLOCKS FOR COVERING TUBE OF GLASS MELTING FURNACE AND METHOD TO MAKE THE GLASS MELTING TUBE WORK

摘要

PCT No. PCT/EP91/02260 Sec. 371 Date May 13, 1993 Sec. 102(e) Date May 13, 1993 PCT Filed Nov. 29, 1991 PCT Pub. No. WO92/10434 PCT Pub. Date Jun. 25, 1992.In a glass melting furnace, a combination includes a tank having an end chamber for containing a glass melt, the tank having soldier blocks arranged side-by-side which are of a refractory, mineral material and form a wall of the end chamber. The soldier blocks have an inner side facing the end chamber and an outer side facing away from the end chamber. The soldier blocks have a rectangular cross-section at least in a bottom region thereof and the soldier blocks reach upwardly above an established level line of the glass melt. The combination includes a plurality of cooling air nozzles which are directed at the outer side of a plurality of the soldier blocks. The soldier blocks individually have on their outer side recesses diminishing a thickness cross section in thickness direction. As corrosion of the soldier blocks progresses, refractory supplementary elements are insertable into the recesses. Each recess is disposed at an upper end of each soldier block. Each soldier block is step shaped with at least two steps by which the cross section of the soldier blocks is reduced abruptly in an upwardly direction. The combination includes supplementary elements for steps of the soldier blocks. The supplementary elements are complimentary to the recesses. The supplementary elements are insertable successively in the recesses and the supplementary elements are a material corrosion-resistant to glass.