Bujao to close cavities to Barros of anodios in blocks of anodios

摘要

A stopper 1 is provided for obturating holes provided for receiving anode rods in anode blocks 3 used for the electrolytic extraction of base metals during the calcination treatment of the anode blocks. The proposed stopper 1 is notable for the fact that it is designed as a moulding of cellulose-containing material. This makes an exact-fit obturation of the anode holes 2 possible. Granular coke introduced as bulk material for the purpose of oxygen displacement between the anode blocks 3 arranged several at a time in the calcining furnace cannot penetrate the anode holes 2. Undesirable bonded material in the anode holes 2 and burn-out in the anode blocks 3 as a consequence of residual oxygen which cannot be completely avoided during the calcination process can no longer occur. The high strength of the stoppers 1 prevents the deformation of the holes 2 by anode blocks 3 arranged in the lower tier of the calcining furnace. At the end of the calcining process when the anode holes 2 have hardened, the cellulose-containing stoppers 1 are carburised and the carbon or ash remaining in the anode holes 2 can be sucked off without difficulty in a subsequent operational step. …IMAGE…