Patent ID: 6887551

Claim:
A system for lining a surface of a substrate material, comprising: at least one tile having a refractory wear resistant face; said at least one tile comprising a top tile part and a bottom tile part; wherein said top tile part comprises the wear resistant face and said top tile part and said bottom tile part are selectively engaged with one another by means of at least one protrusion located on one of the top tile part and the bottom tile part and which is selectively engagable with at least one receptacle located on the other of the top tile part and the bottom tile part, the protrusion comprising (i) a neck portion (ii) a laterally extensive enlarged portion and (iii) a latching surface, the receptacle comprising (i) a throat portion capable of receiving the enlarged portion of the protrusion, (ii) an enlarged cavity portion capable of receiving the enlarged portion of the protrusion and (iii) a latching surface engagable with the latching surface or the protrusion to hold the top tile portion and the bottom tile portion in engagement.