C—ls

7

Electrical Measurements. — Heat 9. Date: 26th August, 1921.

Total length of run . . .. .. . . .. .. 6 hr. 14 mm. Effective length of run .. .. .. .. .. 4 hr. 49 mm. Mean volts on furnace ... .. .. .. . . .. 136 Mean amperes .. .. .. .. .. .. .. 2,316 Mean watts .. .. .. .. .. .. .. 309 Watts (= volts X amps) .. .. .. .. .. .. 315 X.V.A. (= watts x time) .. .. .. .. .. ..1,496 Total units (K.W.H.) consumed x I-25 .. .. .. ..1,664 Pig iron produced .. .. .. .. .. .. (lb.) 651 Units (K.W.H.) per ton of pig .. .. .. .. ..5,715 Slag made .. .. .. .. . . .. .. (lb.) 54] Rat i o flag = 541 = Iron 651 Metallic iron charged in form of sands .. .. .. (lb.) 743 Metallic iron as ferro-silicon, &c. .. .. .. .. (lb.) 61 Lime charged .. .. .. .. . . , . (lb.) 126 Coke-breeze charged .. .. .. .. .. (lb) 260 Lime per ton of iron produced .. . . .. . . (lb.) 4§3 Coke per ton of iron produced .. .. .. .. (lb.) 894 Yield of pig iron per cent, of iron charged .. .. .. .. 80-97 The analyses of the products obtained were as follows : — Pig Iron (before addition of Ferro-silieon). Per Cent. Total carbon .. .. .. .. 4-137 Silicon .. .. .. .. .. 0-255 Sulphur .. .. .. .. .. 0-011 Pig Iron (as Cast). Graphitic carbon .. .. .. .. 2-937) mj. i i oa a i Combined carbon 0404 f Total carbon, 3-341. Silicon .. . . .. .. . . 2-763 Sulphur .. .. .. .. .. 0-010 Phosphorus .. .. .. . 0-313 Manganese .. . . .. .. . . 0-345 Titanium .. ~ .. . • .. 0-078

Time. Volts. Watts. Ui iits. Amps. Remarks. No. 1. No. 2. 11-33 . . Ll-45 .. [2-00 .. L2-15 .. 12-30 .. L2-45 .. 12-50 .. P00 .. 1-15 .. 1-30 .. 1-45 .. 2-00 .. 2-15 .. 2-30 .. 2-45 .. 2-55 .. 3-05 .. 315 .. 333 .. 3-46 .. 4-06 .. 4-22 .. 4-46 .. 5-00 .. 5-30 .. 5-40 .. 5-47 .. 140 150 160 148 164 162 160 150 156 155 174 150 156 160 102 104 Off 105 100 96 98 90 115 98 2,650 2,200 2,350 2.400 2,300 2,450 375 375 otTK 375 375 375 375 375 375 390 493,405 503,544 Commence. 375 390 370 405 370 360 350 360 364 358 210 210 493.598 503,747 I Off for 10 minutes. 2,500 2.650 2.550 2,500 2,200 2,500 2,500 2,300 2,000 2,000 370 405 350 360 OCA 493,819 503,976 I 364 358 493,914 504,070 2,000 2,100 2,1.00 2,200 2,500 2,000 1,800 210 180 OAK 180 205 200 200 210 190 180 493,944 493,948 504.104 504,119 Off 20 minutes for slagging. Off for 19 minutes. Off for 7 minutes. Off for 10 minutes. Off for 4 minutes. 180 494,053 504,227 Off for 1.5 minutes. Run terminated.