Based on data of 150 t converter steelmaking at Anyang Steel

the calculation of charging material balance and heat balance have been carried out and a calculation model is established. With optimum scheme

the multi - cycles calculation on the charging material and heat balance has been carried out to get a reasonable ratio of charging structure

the physical heat of heat balance of liquid and slag making up 75% of total heat expenditure

the physical heat of scrap making up 6% ~ 7% of total heat expenditure

and with the crap ratio being 7% ~ 10%

the consumption of iron and steel charging material decreases by 5. 9 kg per ton of steel and the production cost reduces about 26. 14 Yuan per ton of steel.