Abstract: Method of producing steel slag free from disintegration completed through the modification of slag in molten state by use of a small amount of modifier while increasing the temperature of slag, wherein the chemical composition of the steel slag and modifier to be charged is analyzed beforehand, a small amount of boron-containing compounds and the first modifier consisting of silicate-containing minerals, etc. by which the basicity of the steel slag after treated settles in the range between 1.6 and 1.9 are mixed to the slag and, further, the exothermic and powdery second modifier consisting of one or two and more among aluminum, aluminum dross, magnesium, and magnesium slag is charged together with agitating gas by bubbling.

Abstract: A process for making a binder from steelmaking slag. About 5-30 wt. % of a reforming agent selected from the group consisting of silicate rock, mineral, calamine, glass waste, foundry waste sand, waste brick, red mud, volcanic spouting matter, blast furnace slag, desilica slag, iron oxide and mixtures thereof is added to a molten steelmaking slag, causing a molten reaction forming a reacted steelmaking slag. The reacted steelmaking slag is rapidly cooled to form a powder. Iron is removed from the powder and the powder is then mixed with from about 3-5 wt. % of a powder selected from the group consisting of lime, plaster, cement and mixtures thereof, which can then be used as a binder for pellets or briquettes.

Abstract: A process for diminishing the collapsibility of steel slag by the addition of red mud obtained from the aluminum industry is disclosed.