ELECTRODE MANAGEMENT Ã¢Â€Â“ INVESTIGATION INTO ... - Pyro.co.za

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744 INFACON XI over. A new casing in <strong>co</strong>nical shape was welded from the bottom for rebuilding of the electrode before restart of the furnace. It took total 06 days furnace shutdown to make ready for switching on. Relevant data for electrode operation in actual period and one day before of breakage is submitted along with Electrode model. 2.2 Critical data for electrode operation Table 1 Date Time E1 E2 E3 Time E1 Time E2 Time E3 slipping slipping slipping In hrs. kA kA kA In hrs. In mm In in mm In hrs in mm hrs. 10 th Sep'02 06.00am 94 95 94 6.15 20 7.00 94 95 95 7.15 20 7.30 20 7.00 20 8.00 94 96 96 8.30 20 8.45 20 9.00 96 96 96 9.45 20 9.00 20 10.00 96 95 96 10.00 20 11.00 94 94 96 11.00 20 11.15 20 11.00 20 12.00 94 92 96 12.15 20 12.30 20 12.30 20 13.00 94 92 94 13.30 20 13.45 20 14.00 94 92 90 14.45 20 14.00 20 15.00 92 95 91 15.00 20 15.15 20 16.00 88 93 94 16.00 20 16.15 20 16.30 20 17.00 95 92 96 17.15 20 17.30 20 17.45 20 18.00 93 92 94 18.30 20 18.45 20 19.00 90 95 88 19.45 20 19.00 20 20.00 95 95 93 20 20.00 20 20.15 20 21.00 94 94 94 21.00 20 21.15 20 21.30 20 22.00 95 96 93 22.15 20 22.30 20 22.45 20 23.00 95 93 93 23.30 20 23.45 20 24.00 87 95 90 24.45 20 24.00 20 1.00 95 96 79 2.10 20 1.00 20 1.15 20 2.00 84 96 96 2.30 20 2.15 20 2.30 20 3.00 90 92 96 3.15 20 3.30 20 3.45 20 4.00 92 79 78 4.30 20 4.45 20 5.00 94 84 78 5.45 20 5.00 20 6.00 90 84 80 6.00 20 11 th Sep'02 06.00am 90 84 80 6.15 20 7.00 88 80 70 7.00 20 7.15 20 7.30 20 8.00 92 93 93 8.15 20 8.30 50 8.45 50 9.00 88 88 80 9.30 20 9.45 20 10.00 92 88 92 10.45 20 10.00 20 11.00 96 80 86 11.00 20 11.15 50 12.00 96 84 88 12.00 40 12.15 20 12.30 20 Black fumes observed at E2 casing at 12.57hrs.
Electrode Management – Investigation into Soft Breaks At 48MVA FeCr Closed Furnace 745 2.3 Electrode Current and slip hours before breakage (fig-4) Figure 4 2.4 Calculated slip index “last 8 hours” (fig –5) Figure 5
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ELECTRODE MANAGEMENT Ã¢Â€Â“ INVESTIGATION INTO ... - Pyro.co.za

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