Magnesium bearing compositions for and method of steel desulfurization

An injectable pre-blended desulfurization composition for desulfurizing molten steel which excludes sodium carbonate as an added ingredient and provides a marked reduction in fuming with improved sulfur removal, particularly in low-carbon steels consisting essentially of a mixture of particulate lime and at least one member from the group consisting of particulate metallic magnesium and particulate magnesium alloys proportioned to provide effective desulfurization.

A method of ladle desulfurization of molten steel which excludes sodium carbonate as an added ingredient and provides a marked reduction in fuming with improved sulfur removal, particularly in low-carbon steels consisting of injecting about 4 to 10 lbs. of a pre-blended desulfurization mixture consisting essentially of particulate lime, particulate fluorspar and at least one member from the group consisting of particulate metallic magnesium and magnesium alloys proportioned to provide effective desulfurization, with a carrier gas or argon per ton of steel.

A method of ladle desulfurization of molten steel which excludes sodium carbonate as an added ingredient and provides a marked reduction in fuming with improved sulfur removal, particularly in low-carbon steels consisting of injecting about 4 to 10 lbs. of a pre-blended desulfurization mixture consisting essentially of particulate lime and at least one member from the group consisting of particulate metallic magnesium and particulate magnesium alloys proportioned to provide effective desulfurization, with a carrier gas of argon per ton of steel.