Calculation of the raw materials required to obtain 45 ferrosilicon:
(1) Amount of Silica
Added The amount of silica added for 45 ferrosilicon is basically the same as the calculation method for 75 ferrosilicon, except that the silicon recovery rate is calculated as 96%.
The amount of silicon entering ferrosilicon from 100 kilograms of silica is:
100×98%×28/60×96%=43.7kg
Amount of 45% ferrosilicon that can be smelted:
43.7÷45%=97 kg
The amount of silica required to produce one ton of 45% ferrosilicon is:
100/97×1000=1040 kg
(2) Adding the amount of coke and steel chips
For 100 kg of silica, 52 kg of coke and 54 kg of steel chips are required (see page 25).
The amount of coke required to produce one ton of 45 ferrosilicon is
1040×52/100=550 kg
The amount of steel chips is:
1040×54/100=560 kg
The above calculation shows that 1040 kg of silica, 550 kg of coke and 560 kg of steel scraps are required to smelt one ton of 45th ferrosilicon.