METALLURGICAL SPEAR FOR REACTIV POWDWER BLAST IN METALLIC SMELTINGS

摘要

Lance comprises an external tube with heat protection refractory material, and an internal tube for injection of the powder. A top regulator on the internal tube varies the powder and carrier liq. flow cross-section, for e.g, high-purity steel prodn. The power ends of the tubes have a profiled element sealed into the internal tube and with moving walls. This element excludes penetration into the sec. circuit of any excessive rise of the pressure of the fluid in the prim. circuit of the powder injector.