3rd International Symposium on High Temperature by Tao Jiang,Jiann-Yang Hwang,Patrick Masset, et al.John Wiley
By Tao Jiang,Jiann-Yang Hwang,Patrick Masset, et al.John Wiley & Sons, Inc.|Wiley||Wiley-TMSAdult NonfictionTechnologyLanguage(s): EnglishOn sale date: 02.08.2012Street date: 09.05.2012Preview
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It is also possible to stop for a short while the copper flow and restart casting without any problems. Figure 6. Slide Gate with Heat Protection Shield in O Operation. The limiting factor for the lifetime of the installed refractories is the oxygen lancing in cases where the copper freezes in the tap hole. With the help of the above described nitrogen purging via the lower plate the tap hole can be kept open or during sporadic heats leaves only a thin layer to be lanced. Thus the wear of the inner nozzle is significantly reduced and a life time of more than six weeks was obtained.
With the help of the above described nitrogen purging via the lower plate the tap hole can be kept open or during sporadic heats leaves only a thin layer to be lanced. Thus the wear of the inner nozzle is significantly reduced and a life time of more than six weeks was obtained. The plates show a lifetime of up to 16 heats and the well block hasn't to be changed during the two years life time of the anode furnace. Only small gunning repairs were necessary. Summary of Benefits • Improved safety for operators due to remote controlled opening and closing procedure.
Results Some of the results from furnace operation are summarized in Table I Table I: A summary of metal produced, dust produced, and effect spent. kWhpr Time Metal Furnace Dust Tapnr Real time hours produced produced production effect period kW kg kg 12 1 15:00 4,65 1742 145 1,59 2 214 1,5 4,5 170 0,02 16:30 18:17 3,6 1,75 3 253 170 0,09 20:11 4 3,52 2 254 0,01 147 22:02 2 5 261 3,97 160 0,01 2 2,37 24:09 5,44* 172 6 308 8,4 2 26:15 7 306 15,43 168 0,85 28:00 8 3,35 1,75 140 280 9 30:34 2,5 7,32 311 150 4,0 18,2 33:00 10 2,5 0,70 305 164 1,2 2,5 302 15,22 164 11 35:28 12 3,25 164 27,3 38:45 398 12,39 41:41 3 162 1,0 379 4,5 13 164 14,36 381 0 3 14 44:27 1 38 kWh/kg Si 374,62 47,55 70,28 72,16 65,74 129,95 36,43 83,58 42,49 16,76 19,84 32,12 84,22 - The temperature and off gas analysis was measured close to the furnace surface.