The flash furnace is a key piece of equipment in modern copper smelting processes. Its core function is to rapidly oxidize and melt copper concentrate (mainly composed of Cu₂S and Cu₂O) at high temperatures, producing high-grade matte and slag while reducing the emission of impurities and pollutants.
In the flash smelting furnace for copper smelting, the selection of refractory materials must address the challenges of extreme high temperatures (1300–1400°C), chemical erosion from melts (such as matte, FeO-SiO₂ slag, and SO₂ gas), and intense mechanical abrasion.Magnesia-chrome bricks are used in the reaction tower, high-temperature zones of the settling tank, and slag line areas. Magnesia-alumina spinel bricks can also be used to achieve a chrome-free solution.