11

C—ls

Electrical Measurements. — Heat 12. Date: 27th August, 1921.

Total length of run . . . . .. .. . . . . 8 hr. 32 mm. Effective length of run . . . . . . . . .. 7 hr. 5 mm. Mean volts . .- .. .. .. .. .. .. 135 Mean amps .. . . . . . . .. .. . . 2,322 Mean watts . . .. . . . . . . .. . . 309 Watts (= volts x amps) .. . . .. . . . . . . 313 X.V.A. (= watts X time) .. .. .. .. .. ..2.215 Total units (K.W.H.) consumed x 1-25 .. .. .. .. 2,304 Steel produced .. . . .. .. . . .. (lb.) 460 Units (K.W.H.) per ton of steel .. .. .. .. .. 11,219 Slag made (mostly lining and dolomite used in patching) . . (lb.) 2,471 „i. Slag 2471 . , Ratl "lnrn 460- 5 4 Iron charged in form of sands . . .. . . . . (lb.) 743 Iron charged as ferro-silicon, ferro-manganese, and haematite ore .. (lb.) 100 Yield of iron in form of steel (per cent.) .. . . .. .. 54-6 The analysis of the steel was as follows : — Per Cent. Carbon t»v combustion .. .. .. . . 0-532 Silicon .. .. .. .. .. .. 0-143 Sulphur . . . . . . . . . . . . 0-035 Phosphorus .. .. . . .. . . 0.034 Manganese . . .. . . .. . . 0-582 Arsenic .. . . . . .. . . . . 0-016 Titanium .. .. . . .. . . . . Trace

Time. Volts. Amps. Watts. Ui lits. No. 2. Remarks, No. 1. r 8-15 9-50 10-00 10-15 10-30 10-45 11-00 11-15 11 -20 11-32 11-45 12-00 12-15 12-30 12-45 1-00 1-03 1-05 1-30 1-48 2-00 2-20 2-29 3-00 3-19 3-25 3-47 3-58 4-08 4-20 4-33 5-00 5-20 5-30 5-45 6-00 6-22 144 2.500 160 2,750 160 2,500 ..178 2.200 .. ! 150 2,600 166 2,300 .. ' 148 2.650 .. 168 2.100 170 2.100 180 2,000 151 2,500 .. 136 2,700 150 2,400 100 2,200 97 2,100 100 2,000 100 2.000 95 2,200 146 2.300 140 2,600 .. j 150 2,300 .. i 160 , 2,100 89 2,300 I 128 2,600 :. 90 2,300 .. 92 2,400 104 2.000 Off Metal teemed 373 375 375 380 386 370 375 364 358 370 365 375 375 225 200 200 200 220 495,525 495,572 495,781 505,790 505,855 506,074 Lining temporarily patched. First charge. Second charge ; off for 7 minutes. Off 1 minute for electrode. Half tap. 320 337 496,175 506,493 Off for 23 minutes, first slag. 320 320 I Off for 17 minutes, second slag. 215 496.301 506,619 Half tap. 340 215 215 200 496,345 506,664 Off for 15 minutes, third slag. Off for 1 minute. Off for 1 minute. 496,416 506,742 Off for 22 minutes.