Abstract

A method for producing a semisolid metal slurry, having the steps of providing at least two stirring devices, each having a first end and an opposite second end defining a central axis therebetween, wherein onto each first end a cast metal piece is attached; inserting the first end of each of the at least two stirring devices into a liquid metal bath such that each cast metal piece is submerged in the liquid metal bath; after insertion of the at least two stirring devices into the liquid metal bath, simultaneously rotating the at least two stirring devices with the attached cast metal piece around their respective central axis, and thereby rotating the cast metal pieces in the liquid metal bath; wherein the rotation is continued at least until a majority of the cast metal pieces are molten, such that a semisolid metal slurry is produced.

IPC Classes  ?

• B22D 1/00 - Treatment of fused masses in the ladle or the supply runners before casting
• B22D 17/00 - Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
• F27D 27/00 - Stirring devices for molten material

Abstract

A method for producing a semisolid metal slurry, comprising the steps of providing at least two stirring devices (111,112; 211,212,213), each having a first end (111a,112a; 211a,212a,213a) and an opposite second end (111b,112b; 211b,212b,213b) defining a central axis therebetween, wherein onto each first end (111a,112a; 211a,212a,213a) a cast metal piece (121,122; 221,222,223) is attached; inserting (S3) the first end (111a,112a; 211a,212a,213a) of each of the at least two stirring devices (111,112; 211,212,213) into a liquid metal bath such that each cast metal piece (121,122; 221,222,223) is submerged in the liquid metal bath; after insertion of the at least two stirring devices (111,112; 211,212,213) into the liquid metal bath, simultaneously rotating (S4) the at least two stirring devices (111,112; 211,212,213) with the attached cast metal piece (121,122; 221,222,223) around their respective central axis, and thereby rotating said cast metal pieces (121,122; 221,222,223) in the liquid metal bath; wherein the rotation is continued at least until a majority of the cast metal pieces (121,122; 221,222,223) are molten, such that a semisolid metal slurry is produced.

IPC Classes  ?

• B22D 2/00 - Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
• B22D 17/00 - Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
• C22C 1/00 - Making non-ferrous alloys
• F27B 3/04 - Hearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces of multiple-hearth typeHearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces of multiple-chamber typeCombinations of hearth-type furnaces
• F27D 27/00 - Stirring devices for molten material

Abstract

A method of producing a liquid-solid metal composition (8), including the steps of charging a vessel (2) with a molten metal or alloy (3), charging the vessel (2) with a solid metal or alloy (6), stirring the molten metal or alloy (3) upon cooling thereof. The amount of solid metal or alloy (6) is chosen such that a substantial amount of solid particles (7) will be formed in the melt (3) due to the enthalpy exchange between the solid metal or alloy (6) and the molten metal or alloy (3), and at least a part of the added solid metal or alloy (6) is melted by the heat transferred to it by the molten metal or alloy (3).

IPC Classes  ?

• B22D 27/00 - Treating the metal in the mould while it is molten or ductile
• B22D 27/04 - Influencing the temperature of the metal, e.g. by heating or cooling the mould

Abstract

Disclosed is a stirring device (110) to be used for stirring a semi-solid metal slurry, wherein the stirring device (110) is to rotate around a rotational axis (X-X) when used for stirring a semisolid metal slurry. The stirring device (110) comprises an elongated shaft (111) extending along the rotational axis (X-X), and at least two wings (112a, 112b) securely arranged to the elongated shaft (111) and extending radially outwards from the elongated shaft, wherein the at least two wings (112a, 112b) also have a substantial axial extension along the rotational axis (X-X). Hereby, whirls are produced in the slurry that results in a well-homogenized slurry with no large metal oxide surfaces inside. Disclosed is also a production method and a system for producing the slurry.

IPC Classes  ?

• B01F 27/112 - Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
• B22D 1/00 - Treatment of fused masses in the ladle or the supply runners before casting
• B22D 27/04 - Influencing the temperature of the metal, e.g. by heating or cooling the mould
• B22D 27/20 - Measures not previously mentioned for influencing the grain structure or textureSelection of compositions therefor
• F27D 27/00 - Stirring devices for molten material

Abstract

A method of producing a liquid-solid metal composition (8), comprising the
steps of charging a vessel (2) with a molten metal or alloy (3), charging the
vessel (2) with a solid metal or alloy (6), stirring the molten metal or alloy
(3) upon cooling thereof. The amount of solid metal or alloy (6) is chosen
such that a substantial amount of solid particles (7) will be formed in the
melt (3) due to the enthalpy exchange between the solid metal or alloy (6) and
the molten metal or alloy (3), and at least a part of the added solid metal or
alloy (6) is melted by the heat transferred to it by the molten metal or alloy
(3).

IPC Classes  ?

• B22D 17/00 - Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
• B22D 27/20 - Measures not previously mentioned for influencing the grain structure or textureSelection of compositions therefor
• C22C 1/02 - Making non-ferrous alloys by melting

Abstract

A method for producing a semisolid metal slurry, comprising the steps of providing at least two stirring devices (111,112; 211,212,213), each having a first end (111a,112a; 211a,212a,213a) and an opposite second end (111b,112b; 211b,212b,213b) defining a central axis therebetween, wherein onto each first end (111a,112a; 211a,212a,213a) a cast metal piece (121,122; 221,222,223) is attached; inserting (S3) the first end (111a,112a; 211a,212a,213a) of each of the at least two stirring devices (111,112; 211,212,213) into a liquid metal bath such that each cast metal piece (121,122; 221,222,223) is submerged in the liquid metal bath; after insertion of the at least two stirring devices (111,112; 211,212,213) into the liquid metal bath, simultaneously rotating (S4) the at least two stirring devices (111,112; 211,212,213) with the attached cast metal piece (121,122; 221,222,223) around their respective central axis, and thereby rotating said cast metal pieces (121,122; 221,222,223) in the liquid metal bath; wherein the rotation is continued at least until a majority of the cast metal pieces (121,122; 221,222,223) are molten, such that a semisolid metal slurry is produced.

IPC Classes  ?

• B01F 27/85 - Mixers with rotary stirring devices in fixed receptaclesKneaders with stirrers rotating about a substantially vertical axis with two or more stirrers on separate shafts
• B22D 1/00 - Treatment of fused masses in the ladle or the supply runners before casting
• B22D 17/00 - Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
• C22B 9/16 - Remelting metals
• C22C 1/12 - Making non-ferrous alloys by processing in a semi-solid state, e.g. holding the alloy in the solid-liquid phase
• F27B 3/04 - Hearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces of multiple-hearth typeHearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces of multiple-chamber typeCombinations of hearth-type furnaces
• F27D 27/00 - Stirring devices for molten material