Blast Furnace Slag

Category: business

A non-metallic byproduct consisting of limestone flux combined with the silicates and aluminum impurities stripped from iron ore during smelting.

Slag serves a vital chemical protective function inside the furnace. Being less dense than liquid iron, it floats on top of the molten metal pool in the hearth, acting as an insulation blanket against heat loss and preventing re-oxidation. Liquid slag is continuously skimmed off through a separate slag notch and granulated with water to create a high-value precursor for industrial cement manufacturing.

Common Examples

• We cleared out our secondary storage pads by selling ten thousand tons of processed blast furnace slag to a local concrete manufacturing facility.
• Analyzing the chemical composition of the floating blast furnace slag allows foundry engineers to calculate the precise sulfur absorption rates of the melt.