Abstract: Provided is a concrete composition containing atomized steelmaking slag balls (also referred to as PS balls). More specifically, the present invention provides a concrete composition containing sand wherein the sand is partially or completely replaced with atomized steelmaking slag balls. The concrete composition of the present invention is comprised of water, cement, coarse aggregates having a particle size of more than 5 mm, fine aggregates having a particle size of less than 5 mm, optional additives, and the balance of other inevitable impurities, wherein the fine aggregates include more than 30% by volume of atomized slag balls.

Abstract: Provided are ASCON utilizing atomized slag as fine aggregates and a method for producing the same. More particularly, provided are ASCON composition that is improved in strength by substituting all or part of fine aggregates for atomized slag and a method for producing the same. ASCON composition includes coarse aggregates, fine aggregates, fillers, and asphalt. When the fine aggregates is 100 parts by weight, the fine aggregates include 0-70 parts by weight of atomized slag balls having a diameter of less than 5mm. Accordingly, it is possible to obtain the ASCON composition that has large strength and can greatly reduce a heating temperature in the mixing operation.

Abstract: A method for recovering useful metal included in slag generated from steel-making process in a convertor. The method comprises the steps of atomizing the slag in water, screening the atomized slag so as to be classified by sizes, dropping the classified slag of similar sizes into a flow of blowing air to sort it into a high-weight group and a low-weight group, and transferring the high-weight group into a furnace to recovering useful metal therefrom. The useful metal can be recovered at a low cost. In addition, since the inventive method does not accompany with the pulverization, polluting factor such as noise and dust is eliminated and thus, the working conditions become more comfortable. Moreover, the inventive method is advantageous in a view of reuse because the low-weight slag is used as useful materials such as short balls, grits, fluxes and aggregates.