... 50-150mm 4.Steel making, iron maki High Quality RE Ferro Silicon alloy is mainly applied to steel making, iron making, exhausting, purifying ... molten steel etc.Application: High Quality RE Ferro Silicon alloy is mainly applied to steel making, iron making, exhausting, purifying ... .0Allowance19504139.0~<42.0≥4637.02.04.01.0Allowance RE Ferro Silicon alloy