Slag plug accurate fixed-point insert tapping hole is achievethe desired effect of the guarantee of slag furnace of the steelwave,  140 mm or so tapping hole inundated in the molten steelslag plug put under, the I developed by the company put on thedevice can slag plug will guide bar accurately insert in tappinghole, the percentage is 99% more, and slag layer thickness in ladleaverage less than 50 mm