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: The invention relates to magnesium-based alloy and, more specifically, to a magnesium alloy composition and methods of producing the same. The alloy has finer grain size, which results in improving mechanical properties of the alloy. Those mechanical properties make the alloy suitable for high-pressure casting. The alloy comprises aluminium, zinc, manganese, silicon, and calcium. A method for producing said alloy consists of loading the alloying components, pouring the molten magnesium, introducing a titanium-containing fusion cake with a flux agent and continuously agitating. The alloy is then soaked and cast.

Abstract: The invention relates to magnesium-based alloys and, more specifically, to a magnesium alloy composition and methods of producing the same. The alloys have improved mechanical properties in that creep ratios are decreased. The magnesium-based alloys comprise aluminium, zinc, manganese and silicon. A method for producing said alloy consists of loading the alloying components, pouring the molten magnesium, introducing a titanium-containing fusion cake with a flux agent and continuously agitating. The alloy is then soaked and cast.

Abstract: A method of grain refining cast magnesium alloy includes adding to a magnesium alloy melt containing aluminum and manganese, pure carbon powder, or a carbon source in combination with niobium pentoxide or vanadium pentoxide.

Abstract: A process for producing a refined magnesium material which is flame resistant by adding an alkaline earth metal. In the process, the dross in a thin film is formed on the surface of the molten magnesium material by contacting it with a dross-formable atmosphere gas while the molten magnesium material is subjected to a vertical vortex flow. The dross encloses or wraps the impurity floating on the surface of molten magnesium material through the vortex flow in a vertical direction. The resultant dross is accumulated at the corner of the crucible to prevent the re-diffusion of the impurity. The continuous application of the vortex flow to the molten magnesium material causes the thin film of dross to be continuously formed on the molten magnesium material and adhered thereto so as to enclose or wraps the impurity each time it is formed. Accordingly, the molten magnesium material is improved in purity.

Abstract: Hydrogen is essentially removed from molten magnesium by the use of a degassing step, thereby substantially avoiding the formation of zirconium hydride when zirconium and silicon are added to the molten magnesium, after the degassing, in order to precipitate iron contamination in the magnesium as an intermetallic compound comprising Fe, Zr, and Si; the ratio of the three metals in the intermetallic compound can vary over a wide range. By essentially avoiding the formation of slow-settling insoluble ZrH.sub.2, the iron removal is more efficient and the settling of the insolubles is expedited. Also, the Fe and Si are more effectively and consistently precipitated.