. Transactions. <i 71 4 5 6 7 Ra+io of Mn tq Fe Rcguirsd fn Ore Chorge Fig. 11.—Charge calculation curve, manganese-iron ratio. Fc Diff<3rQnce,Percent7 8 9. ~/V/7%. I I Mixfure of Two Ores = 1000lb. Wet Weighf- High Mn Low Fe LowMn HighFe(Mn27% Fc fojo Wet Weight) lOOO900800700GOO500400300200100 5 6 T 8 9 Fe Differenc<?,Percent Fig. 12.—Charge calculation curve, ore proportions. developed, which aid in quick charge calculation. The curves shownin Fig. 11 provide a quick means of determining the ratio of manganese ROBERT M. KEENEY AND JAY LONERGAN 573 to iron required in the
. Transactions. <i 71 4 5 6 7 Ra+io of Mn tq Fe Rcguirsd fn Ore Chorge Fig. 11.—Charge calculation curve, manganese-iron ratio. Fc Diff<3rQnce,Percent7 8 9. ~/V/7%. I I Mixfure of Two Ores = 1000lb. Wet Weighf- High Mn Low Fe LowMn HighFe(Mn27% Fc fojo Wet Weight) lOOO900800700GOO500400300200100 5 6 T 8 9 Fe Differenc<?,Percent Fig. 12.—Charge calculation curve, ore proportions. developed, which aid in quick charge calculation. The curves shownin Fig. 11 provide a quick means of determining the ratio of manganese ROBERT M. KEENEY AND JAY LONERGAN 573 to iron required in the charge for production of ferromanganese of acertain grade, considering the approximate recovery of manganese beingmade at the time. Having determined the ratio of manganese to iron, the proportionsof any two ores required to give the desired grade of ferromanganese canbe determined from the curves shown in Fig. 12 where No. 1 ore is ahigh-grade manganese ore with low iron content, and No 2 ore is a low-manganese high-iron ore. Or the proportions can be found from thefollowing formulas in which the total weight of the mixture is 1000 lb.( kg.). Weig
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
