By means of analyzing the characteristics of TISCO stainless steel raw materials such as chromium-nickel crude iron

high-carbon ferrochrome and molten iron

studying the optimal use of Si and C elements in the raw materials

and using of various combinations of intermediate frequency furnace

electric arc furnace

converter

AOD and other processes

the several different combinations of stainless steel process routes for 300 series and 400 series stainless steel has been developed

and a multi-in-one process stainless steel production process is formed. Production practice shows that as 400 series stainless steel is smelted by mixing molten iron dephosphorized by 180 t converter and pre-melted of high carbon ferrochrome by 50 t medium frequency furnace charging to AOD process

the chromium yield increases by 2.47%

ferrosilicon consumption reduces by 5.5 kg/t

and lime consumption reduces by 10 kg/t

as 300 series stainless steel is produced by mixing the pre-melt melted by 160 t electric arc furnace + 2 x 50 t intermediate frequency furnace charging to AOD process

chromium yield increases by 2. 2%

electrode consumption is reduced by 1.8Kg/t

and smelting cost is greatly reduction.