Slag is a by-product that is a complex of oxides and silicates lighter than metal, accumulating on the surface due to density differences generated when metals or ores with metal content are melted.

Slag is formed on the steel due to the density becoming lower than the steel itself during refining and oxidation of metal melt in steel production furnaces and removed from the furnace at 1300 °C or higher temperatures.

Slags are produced in large amounts in pyrometallurgical processes, and they are a major source of waste if not properly recycled and utilized. Sanitary landfills are required for metallurgical slags and disposal costs also increase with increasing industrialization. Landfills filled with waste materials have become sources of pollution causing air, soil and water pollution. And these have impact on human health and plant growth. Slag recycling efforts have environmental and economic objectives. Reprocessed slag may be substituted for most of the other required high cost materials. Slag recycling reduces waste, disposal costs and energy consumption, and extends the service life of the furnace. In Tosyalı Harsco, slag is subjected to crushing-sieving-grinding and magnetic separation processes. Slag from which the metal is recovered is crushed, grinded, and sized based on its intended use.

Slag Usage Areas

• Road Construction

• Pathways

• Structural Fills

• Asphalt

• Fertilizer

• Building Insulation

• Retaining Wall

• Drainage

• Stabilized Material

• Cement Production

• Nonstructural Concretes

• FerroAlloy Production

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