Blast furnace slag can be used a variety of processes with multiple applications processed into a valuable material. Processed into slag aggregates can replace the natural sand and gravel, as a concrete, reinforced concrete and prestressed concrete under No. 500 aggregate, the working temperature of 700 ℃ below the heat-resistant concrete aggregate, require abrasion resistance, non-slip of the highway, the car field, runway and other support materials, railway ballast, fill the trenches and in the foundation cushion fillers, sewage treatment and other media. Blast furnace slag with plenty of water quenching, the vitreous can be made with water-based fine-grained slag, the water potential performance of a hard gel, in the cement clinker, lime, gypsum, etc. under the action of stimulating agents, indicating water PS coagulation performance, and high quality raw material for concrete. China's cement production 70% a 80% mixed with different amounts of water residue. Slag can also be subjects for insulation material, wet grinding and wet grinding slag, concrete, and road works of fine aggregate; soil improvement materials.
Hot-melt expansion of slag can be processed into a porous slag by crushing, screening became concrete light orthopedics, but also includes processed into porous smooth surface, particles of varying sizes - expandable beads. Expansion beads are high-quality lightweight aggregate concrete than with the expansion of slag cement can save 20%; can be made of cement mixed materials, road materials, insulation materials.
Blowing with compressed air or high pressure steam injection hot-melt slag flow, slag can be prepared from cotton. As insulation, sound absorption, fireproofing materials, and so on. 
  Blast furnace slag can also serve as cast stone, glass, fertilizer, enamel, ceramic and other raw materials.