The calculation of the addition of the adjusted elements of the molten metal in the induction melting furnace:

gt=Gz(Xa-Xb)/Cd(kg)

gt－Adding amount of C-increasing agent or other alloys (kg)

Gz－Total weight of molten iron in furnace (kg)

Xa-target value of molten iron composition (%)

Xb－Analysis value of molten iron composition in the furnace (%)

C-C-increasing agent or other alloy content (%)

d-Absorption rate of active ingredients (100% is 1)

The molten iron C and SI exceed the target composition, add scrap to reduce C, SI calculation gt=Gz(Xb-Xa)/b

b-the content of the adjusted element in the scrap

The empirical data is: add 34kg scrap iron/t, reduce 0.1% C and reduce 0.05% Si