Abstract: An in-line deep box treatment of molten metal wherein, instead of gaseous Cl2, a solid salt reactant containing a halide salt (e.g., MgCl2) as one of its components may be injected into the molten metal along with an inert gas (typically argon) through the existing degasser impellor. The salt flux may be metered into the inert gas stream at a controlled rate. A salt injector flux tank may be retrofitted to current rotary degassing equipments without requiring a specialized rotor design or changes in the degasser unit design. Using the halide salt-based solid flux, the benefits of alkali, alkaline earth, and inclusion removal may be achieved without the industrial hygiene, environmental, and safety issues associated with storing and using the gaseous and hazardous Cl2 during molten metal degassing.

Abstract: An in-line deep box treatment of molten metal wherein, instead of gaseous Cl2, a solid salt reactant containing a halide salt (e.g., MgCl2) as one of its components may be injected into the molten metal along with an inert gas (typically argon) through the existing degasser impellor. The salt flux may be metered into the inert gas stream at a controlled rate. A salt injector flux tank may be retrofitted to current rotary degassing equipments without requiring a specialized rotor design or changes in the degasser unit design. Using the halide salt-based solid flux, the benefits of alkali, alkaline earth, and inclusion removal may be achieved without the industrial hygiene, environmental, and safety issues associated with storing and using the gaseous and hazardous Cl2 during molten metal degassing.