Copper slag is a by-product of copper extraction by smelting. During smelting, impurities become slag which floats on the molten metal. Slag that is quenched in water produces angular granules which are disposed of as waste or utilized as discussed below. Copper slag is mainly used for surface blast-cleaning. Abrasive blasting is used toclean and shape the surface of metal, stone, concrete and other materials.
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