초록 ▼

An improved method for treating a body of molten aluminum using an impeller suitable for dispersing fluxing gas or solid particles in the body of molten aluminum. The method produces increased shear forces in the body of molten aluminum and reduces vortex formation. The method comprises providing a

An improved method for treating a body of molten aluminum using an impeller suitable for dispersing fluxing gas or solid particles in the body of molten aluminum. The method produces increased shear forces in the body of molten aluminum and reduces vortex formation. The method comprises providing a body of molten aluminum and projecting an impeller on a shaft into the body, the impeller comprising a rectangular-shaped body having a first rectangular-shaped face and a second rectangular-shaped face disposed substantially opposite the first face, the faces substantially parallel to the shaft and defined by a length L and a height H wherein the length L is greater than the height H. Fluxing gas and particles are dispersed in the body by rotating the impeller in one direction and thereafter reversing the direction of rotation of the impeller to a counter direction, the direction of rotation of the impeller being reversed periodically to provide increased shear forces in the body for improved dispersion of the gas or the particles in the body.

대표청구항 ▼

An improved method for processing a body of molten aluminum using an impeller, the method including increasing shear forces in the body of molten aluminum and reducing vortex formation, the method comprising the steps of: (a) providing a body of molten aluminum; (b) projecting an impeller on a shaft

An improved method for processing a body of molten aluminum using an impeller, the method including increasing shear forces in the body of molten aluminum and reducing vortex formation, the method comprising the steps of: (a) providing a body of molten aluminum; (b) projecting an impeller on a shaft into said body, said impeller comprising a rectangular-shaped body having a first rectangular-shaped face and a second rectangular-shaped face disposed substantially opposite said first face, said faces substantially parallel to said shaft and defined by a length L and a height H wherein said length L is greater than said height H; (c) processing said body by: (i) rotating said impeller in one direction; and thereafter (ii) reversing said direction of rotation of said impeller to a counter direction; and (iii) the direction of rotation of said impeller being reversed periodically to provide increased shear forces in said body.