I-Ferrosilicon iwuhlobo lwe-ferroalloy olwakhiwa ngokuncishiswa kwe-silica noma isihlabathi nge-coke lapho kukhona insimbi.Imithombo ejwayelekile ye-iron insimbi eyi-scrap noma i-millscale.Ama-Ferrosilicons anokuqukethwe kwe-silicon afika cishe ku-15% enziwa ezithandweni eziqhumayo ezifakwe izitini zomlilo ezine-asidi.