NO342536B1 - A molten metal and powder adding and mixing system and a system for the production of metal - Google Patents
A molten metal and powder adding and mixing system and a system for the production of metal Download PDFInfo
- Publication number
- NO342536B1 NO342536B1 NO20150703A NO20150703A NO342536B1 NO 342536 B1 NO342536 B1 NO 342536B1 NO 20150703 A NO20150703 A NO 20150703A NO 20150703 A NO20150703 A NO 20150703A NO 342536 B1 NO342536 B1 NO 342536B1
- Authority
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- Norway
- Prior art keywords
- powder
- molten metal
- mixing chamber
- inlet
- mixing
- Prior art date
Links
- 239000000843 powder Substances 0.000 title claims abstract description 123
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 106
- 239000002184 metal Substances 0.000 title claims abstract description 106
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000004411 aluminium Substances 0.000 claims description 16
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminium flouride Chemical group F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 claims description 12
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 5
- 229910052708 sodium Inorganic materials 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- 230000005484 gravity Effects 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/57—Mixing high-viscosity liquids with solids
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
- C22B9/103—Methods of introduction of solid or liquid refining or fluxing agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/70—Spray-mixers, e.g. for mixing intersecting sheets of material
- B01F25/72—Spray-mixers, e.g. for mixing intersecting sheets of material with nozzles
- B01F25/721—Spray-mixers, e.g. for mixing intersecting sheets of material with nozzles for spraying a fluid on falling particles or on a liquid curtain
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/50—Mixing receptacles
- B01F35/53—Mixing receptacles characterised by the configuration of the interior, e.g. baffles for facilitating the mixing of components
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/062—Obtaining aluminium refining using salt or fluxing agents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
- C22B9/106—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents the refining being obtained by intimately mixing the molten metal with a molten salt or slag
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a system for adding powder to molten metal and for mixing the powder into the molten metal. The system includes a powder tank and a mixing chamber(4) with a varying cross section in a direction of flow. The Mixing Chamber includes a powder inlet, a molten metal inlet, an outlet (14) providing a flow path for a mixture for molten metal and powder between the mixing chamber (4) and a crucible (5). At least one deflecting portion is located opposed the inlet. A flow path between the powder tank (1) and the powder inlet leads the powder into the mixing chamber (4). Furthermore, the invention relates to a system for the production of aluminium, including a crucible (5) and a Crucible cover (7) defining a crucible cavity and a drain pipe (8). The system includes the powder tank (1), the mixing chamber (4) inside the crucible cavity, the mixing chamber (4) including a powder inlet, a molten metal inlet, an outlet (14) providing a flow path for a mixture for molten metal and powder between the mixing chamber (4) and the crucible (5). At least one deflecting portion is opposing the inlet. A flow path between the powder tank (1) and the powder inlet leads powder into the mixing chamber (4).The present invention relates to a system for adding powder to molten metal and for mixing the powder into the molten metal. The system includes a powder tank and a mixing chamber (4) with a varying cross section in a direction of flow. The Mixing Chamber includes a powder inlet, a molten metal inlet, an outlet (14) providing a flow path for a mixture for molten metal and powder between the mixing chamber (4) and a crucible (5). At least one deflecting portion is located opposite the inlet. A flow path between the powder tank (1) and the powder inlet leads the powder into the mixing chamber (4). Furthermore, the invention relates to a system for the production of aluminum, including a crucible (5) and a Crucible cover (7) defining a crucible cavity and a drain pipe (8). The system includes the powder tank (1), the mixing chamber (4) inside the crucible cavity, the mixing chamber (4) including a powder inlet, a molten metal inlet, an outlet (14) providing a flow path for a mixture for molten metal and powder between the mixing chamber (4) and the crucible (5). At least one deflecting portion is opposite the inlet. A flow path between the powder tank (1) and the powder inlet leads powder into the mixing chamber (4).
Description
A molten metal and powder adding and mixing system and a metal production system.
The present invention relates to an apparatus for adding and mixing powder in a molten metal. In particular, the present invention is adapted to add aluminium fluoride to molted aluminium to remove sodium and to add alloying elements.
Normally, adding fluoride powder (AIF3) and mixing the fluoride powder with molten aluminium in a smelting plant or foundry remove the sodium from the molten aluminium. Typically, a motor driven rotor or a propeller in the bath of molten aluminium evenly distribute the powder.
The mixing and sodium removal process is time consuming and equipment intensive and there is a risk that contaminants are stirred into the bath.
Furthermore, the temperature may have to be maintained at a higher level for a longer period to allow sufficient time for the mixing process, and energy is used for driving the motor driven rotor thus increasing the overall energy consumption. These issues are also relevant when adding alloying elements.
The present invention relates to a molten metal and powder adding and mixing system and a system for the production of metal according to the accompanying claims. The systems of the invention may reduce the energy consumption, may provide a reliable system with few or no moving parts, may improve the distribution of powder in the molten metal, and may reduce the required time of the molten metal in the crucible. In the system of the invention, the powder is properly distributed in the molten material at an early stage ahead of the crucible, thus reducing the time requirement for the mixture in the crucible.
The directions “up”, “down”, “upper”, “lower” etc. in the specification and claims are intended to describe relative directions or locations where the direction of gravity is the reference. The direction “direction of flow” intends to describe the predominant direction of flow to separate this direction from a direction perpendicular to the direction of flow, and is a direction defined regardless of an actual flow through the system. The varying cross section in the direction of flow of the mixing chamber thereby excludes that the mixing chamber is a portion of a tube.
Specifically, the invention relates to a molten metal and powder adding and mixing system. The system comprises a powder tank, a mixing chamber with a varying cross section in a direction of flow, a powder inlet, a molten metal inlet, a metal outlet providing a flow path for a mixture of molten metal and powder between the mixing chamber and a crucible, and at least one deflecting portion opposing the inlet. A flow path extends between the powder tank and the powder inlet in the mixing chamber.
The powder inlet may be located in an upper portion of the mixing chamber, and the metal inlet may be located in a metal inlet side portion of the mixing chamber. The outlet may be located in a bottom portion of the mixing chamber, and the deflecting side portion opposes the metal inlet side portion of the mixing chamber.
The powder inlet is typically in a “dry” portion of the mixing chamber, as a cavity is formed above the molten metal in the mixing chamber. The powder inlet is located in this cavity, allowing the powder to be spread on top of a surface of the molten metal in the mixing chamber. In other words, the mixing chamber will in operation, not be filled completely with molten metal.
The metal inlet in the mixing chamber may be located at a top end of the inlet side portion, adjacent the powder inlet.
The inlet may be horizontal or at a shallow angle close to horizontal, and may thereby be adapted to lead a jet of molten metal at a horizontal or at a shallow angle close to horizontal into the mixing chamber. This angle facilitates the maintenance of the dry cavity above the molten metal where the powder inlet is located.
The deflecting side portion opposing the inlet side portion of the mixing chamber may form a swirling unit with an outline defining a slight curvature at the top followed by a slightly increased curvature until it reaches a steep curve at an apex portion, and then ease off until an almost flat portion at a bottom portion of the mixing chamber. The mixing chamber shape thereby resembles a common “human nose” and outlet for the mix of powder and molten metal is through the “nostril”.
The mixing chamber may be formed between a holding plate and a swirling unit, wherein the molten metal inlet is formed in the holding plate, and wherein the at least one deflecting portion opposing the inlet is formed in the swirling unit.
In one embodiment may the holding plate be integrated in the swirling unit such that the mixing chamber is formed in one unitary structure.
The flow path between the powder tank and the powder inlet may include a first closing valve and a metering nozzle.
The powder inlet in the mixing chamber may include a powder spreader.
The task of the powder spreader is to distribute the powder to a powder curtain falling under the effect of gravity onto the surface of the molten metal in the “dry” cavity in the top area of the mixing chamber, finely distributing the powder onto the molten metal surface.
The inlet may be formed with a tubular curved inlet flange with an attachment portion for a drainpipe.
Furthermore, the invention relates to a system for the production of aluminium. The system includes a drainpipe, a crucible and a crucible cover defining a crucible cavity. The system further includes a powder tank. A mixing chamber is located inside the crucible cavity. The mixing chamber includes a powder inlet, a molten metal inlet and a metal outlet providing a flow path for a mixture for molten metal and powder between the mixing chamber and the crucible. At least one deflecting portion opposes the molten metal inlet, and a flow path is provided between the powder tank and the powder inlet in the mixing chamber.
Locating the mixing chamber inside the cavity defined by the crucible and the crucible cover reduces the heat loss from the mixing chamber to a minimum. The mixing chamber is thereby also exposed to vacuum or nearly vacuum, and leaks in the mixing chamber are unproblematic.
The crucible cover includes at least one connector for connection to a vacuum unit.
The system for the production of aluminium defined above is combinable with a molten metal and powder adding and mixing system with any of the features mentioned above.
The molten metal may be molten aluminium and the powder may be aluminium fluoride.
Short description of the accompanying drawings:
Fig. 1 is a cross section through a crucible with a molten metal and powder adding and mixing system of the invention;
Fig. 2 is a cross section of a drain head of fig.1 in detail, and
Fig. 3 is a cross section of a drain head of fig.1 in detail, perpendicular to the cross section of fig.2.
Detailed description of an embodiment of the invention with reference to the accompanying drawings:
Fig. 1 is a cross section of molten metal and powder adding and mixing system of the invention with a crucible 5 for molten metal 9 with a crucible cover 7 with a system for adding a powder 10 to the molten metal 9 according to the invention. The system includes a drainpipe 8 attached to an inlet flange 13 on a drain head 6. The inlet flange 13 connects a mixing chamber 4 forming a rotor chamber with the drainpipe 8. A flow path for powder 10 extends between the powder container 1 and the mixing chamber. A closing valve 11 followed by a nozzle 2 and a powder spreader 3 at a top of the mixing chamber 4 forms the flow path for the powder 10. A mixing chamber 4 metal outlet 14 allows mixed molten metal and powder to flow into the crucible 5. The outlet 14 is located above a surface 15 of the molten metal bath 9 in the crucible 5. Connectors 16 for connection to a vacuum pump, an ejector mechanism (not shown) or any other vacuum mechanism providing low pressure or vacuum are located in the crucible cover 7. The mixing chamber 4 and the inlet flange 13 form parts of the drain head 6.
In the embodiment shown in figs.1-3, is powder fed to the liquid metal during transfer of liquid metal from a furnace to the crucible 5. The vacuum mechanism maintains a low, sub-atmosphere pressure in the crucible 5, thereby “sucking” the molten metal 9 from the furnace into the crucible 5, as the furnace is at atmospheric pressure. The powder container 1 is sealed and is exposed to the same pressure as the cavity in the crucible. The atmospheric pressure presses the molten metal into the crucible 5 through the drainpipe 8, the inlet flange 13 and the mixing chamber 4.
Low pressure affects the ability of aluminium fluoride powder to remove sodium from liquid aluminium favorably when aluminium fluoride powder is added to remove sodium from liquid aluminium.
Fig. 2 is a cross section of the drain head of fig.1 in detail, also indicating the flow of molten metal with flow lines. The flow lines show how the molten metal in the mixing chamber forming a rotor chamber leads the molten metal and powder into a swirling motion or vortex in the mixing chamber, facilitating the mixing of the molten metal and the powder. The specific mixing chamber shape shown in the drawings provides three “rotors” or vortexes finely distributing the powder in the molten metal. The powder 10 in the powder tank 1 runs through the closing valve 11 and the powder spreader 3 at the top of the mixing chamber. A metering nozzle 2 in the flow path between the powder spreader 3 and the opening and closing valve 11 ensures addition of the correct amount of powder into the molten metal. A “dry” cavity 12 is formed in the mixing chamber above the molten metal, allowing the powder to be distributed onto a top surface 20 of the molten metal inside the mixing chamber where the powder inlet is located. A holding plate 17 and a swirling unit 18 defines the outer perimeter on the inside of the mixing chamber. The powder spreader 3 is located at a top of the mixing chamber and the swirling unit 18, allowing the powder to be distributed into the molten metal at the top of the mixing chamber. The swirling unit 18 is formed like a “human nose” and the inlet flange enters through the holding plate 17, allowing the molten metal enriched with powder to impinge onto a wall of the swirling unit 18 at the upper part of the nose. The outline of nose shape defines a slight curvature at the top, and the curvature increases slightly until it reaches its steepest curve at its outer extremity at the rightmost portion of the mixing chamber. The curvature eases off until a flat or almost flat portion at a bottom portion of the mixing chamber. The outline then makes a sharp turn downwards to form the outlet 14. The sharp turn downwards forms a step in the outlet 14. The outline is concave or flat along its entire length apart from the sharp downwards turn for the outlet 14. This outline is formed entirely in the swirling unit 18. The holding plate 17 located below the inlet flange 13 opposite the swirling unit 18 also defines a concave curved surface facing towards the swirling unit 18, with the sharpest curvature at the top close to the inlet flange 13. The curved surface of the holding plate 17 extends all the way to the outlet 14. The curved surface of the holding plate imposes an upward force on the molten metal impinging onto the holding plate, thereby facilitating the vortex motion of the molten metal, thus improving mixing. Accordingly, the outlet forms a duct with one substantially flat side on the swirling unit 18, and one substantially curved side on the holding plate opposite the flat side of the swirling unit 18. The outlet 14 is rectangular when seen from below. The flow lines show how the molten metal and powder mixture follows the wall of the swirling unit 18 before impinging on the holding plate 17 above the outlet 14, thereby forming a swirling motion in the nose before exiting out of the outlet 14 and into the molten metal bath in the crucible.
The mixing chamber has thus a varying cross section in a direction of flow of the molten metal from the drainpipe 8. A powder inlet 22, a molten metal inlet 21 and the outlet 14 provides the flow path for the mixture of molten metal and powder between the mixing chamber and the crucible. A deflecting sode portion located on the swirling unit 18 opposes the molten metal inlet 21. The powder inlet 22 is located in an upper portion of the mixing chamber. The molten metal inlet 21 is located in an inlet side portion of the mixing chamber. The outlet 14 is located in a bottom portion of the mixing chamber, and the deflecting side portion opposes the inlet side portion of the mixing chamber 4.
The molten metal inlet 21 of the mixing chamber is located at a top end of the inlet side portion, adjacent the powder inlet 22.
The molten metal inlet 21 is horizontal or at a shallow angle close to horizontal, and is adapted to lead a jet of molten metal at a horizontal or a shallow angle close to horizontal into the mixing chamber.
The swirling unit 18 form an outline defining a slight curvature at the top, followed by a slightly increased curvature until it reaches a steep curve at an apex portion, and then ease off until an almost flat portion at a bottom portion of the mixing chamber 4.
Fig. 3 is a cross section of the drain head of fig.1 in detail, in a section perpendicular in to the cross section of fig.2. Fig.3, shows the width of the mixing chamber, that the “nose shaped” cross section is uniform across this width and that the rectangular metal outlet 14 provides the outlet from the mixing chamber 4. The opening or closing valve 11 and the metering nozzle 2 are located in the flow path for the powder 10 in the powder container 1. The metering nozzle 2 in the flow path above the powder spreader 3 ensures that the spreader 3 distributes the correct amount of powder to the molten metal. The spreader includes a plow shaped structure to distribute the powder to a powder curtain. In its simplest form, the metering nozzle 2 includes a plate with a hole or aperture allowing a certain amount of powder to pour through. The powder nature of the powder 10 allows the powder to run into the mixing chamber 4 due to gravity in spite of the vacuum or low pressure in the powder container.. The swirling unit includes two substantially flat side portions 19 to form a complete enclosure of the mixing chamber.
The powder is typically aluminium fluoride (AIF3), and the molten metal is typically molten aluminium.
There are no moving parts in contact with the molten metal, and the powder is completely mixed with the molten metal upon entry into the molten metal bath (molten metal bath 9 on fig.1). Accordingly, the mixing of the powder with the molten metal is quick and no extra energy is required.
The cavity inside crucible and crucible cover is exposed to vacuum when the drainpipe is in a draining position in a cell with molten aluminium to suck the molten aluminium through the drainpipe. The valve in the powder tank opens at the same time as the cavity is exposed to vacuum. The powder is metered into the molten metal jet and is mixed with the metal. The shape of the mixing chamber 4 creates axial rotations or turbulences holding the metal at the same time as the powder is mixed into the metal to achieve a homogenous and even distribution of the powder in the metal.
The low number of moving parts provides a relatively uncomplicated and cost effective structure, both in terms of building and operating costs. Apart from the valve, the system can be built without any moving parts.
The system is easy to retrofit on existing equipment and involves modest installation costs.
The compact design with the essential components inside the crucible below the crucible cover also provides a solution with negligible temperature loss and thus no increase in hot surface areas on the solution.
The invention was developed particularly for aluminium and aluminium fluoride powder, but the invention can be used for other metals and additives in powder form. Another relevant metal is magnesium.
Claims (12)
1. A molten metal and powder adding and mixing system comprising:
a powder tank (1);
a mixing chamber (4) with a varying cross section in a direction of flow, a powder inlet (22) located in an upper portion of the mixing chamber (4), an molten metal inlet (21) located in an inlet side portion of the mixing chamber (4), an outlet (14) located in a bottom portion of the mixing chamber (4) providing a flow path for a mixture for molten metal and powder between the mixing chamber (4) and a crucible (5), and at least one deflecting portion opposing the molten metal inlet (21); and
a flow path between the powder tank (1) and the powder inlet (22) in the mixing chamber (4).
2. The molten metal and powder adding and mixing system of claim 1, wherein the molten metal inlet (21) of the mixing chamber (4) is located at a top end of the inlet side portion, adjacent the powder inlet (22).
3. The molten metal and powder adding and mixing system of claim 2, wherein the inlet is horizontal or at a shallow angle close to horizontal, whereby the inlet is adapted to lead a jet of molten metal at a horizontal or a shallow angle close to horizontal into the mixing chamber.
4. The molten metal and powder adding and mixing system of one of the claims 1-3, wherein the deflecting side portion opposing the inlet side portion of the mixing chamber (4) forms a swirling unit (18) with an outline defining a slight curvature at the top, followed by a slightly increased curvature until it reaches a steep curve at an apex portion, and then ease off until an almost flat portion at a bottom portion of the mixing chamber 4.
5. The molten metal and powder adding and mixing system of any of the preceding claims, wherein the mixing chamber (4) is formed between a holding plate (17) and a swirling unit (18), wherein the molten metal inlet (21) is formed in the holding plate (17), and wherein the at least one deflecting portion opposing the molten metal inlet (21) is formed in the swirling unit (18).
6. The molten metal and powder adding and mixing system of any of the preceding claims, wherein the flow path between the powder tank (1) and the powder inlet (22) includes a first closing valve (11) and a metering nozzle (2).
7. The molten metal and powder adding and mixing system of any of the preceding claims, wherein the powder inlet (22) in the mixing chamber (4) includes a powder spreader (3).
8. The molten metal and powder adding and mixing system of any of the preceding claims, wherein the molten metal inlet (21) is formed with a tubular curved inlet flange (13) with an attachment portion for a drainpipe (8).
9. A system for the production of metal, including a drain pipe (8), a crucible (5) and a crucible cover (7) defining a crucible cavity, the system further including: a powder tank (1);
a mixing chamber (4) inside the crucible cavity, the mixing chamber (4) including a powder inlet (22) located in an upper portion of the mixing chamber (4), a molten metal inlet (21) located in an inlet side portion of the mixing chamber (4), an outlet (14) located in a bottom portion of the mixing chamber (4), providing a flow path for a mixture for molten metal and powder between the mixing chamber (4) and the crucible (5), at least one deflecting portion opposing the molten metal inlet (21); and
a flow path between the powder tank (1) and the powder inlet (22) in the mixing chamber (4).
10. The system for the production of aluminium of claim 9 wherein the crucible cover (7) includes at least one connector (16) for connection with a vacuum unit.
11. The system for the production of aluminium of claim 9 or 10 with a molten metal and powder adding and mixing system of any of the claims 2-9.
12. A system of any of the preceding claims wherein the molten metal is molten aluminium and the powder is aluminium fluoride.
CLAIMS:
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20150703A NO342536B1 (en) | 2015-06-01 | 2015-06-01 | A molten metal and powder adding and mixing system and a system for the production of metal |
| BR112017025990-7A BR112017025990B1 (en) | 2015-06-01 | 2016-05-31 | SYSTEM FOR THE ADDITION AND MIXING OF POWDER AND CAST ALUMINUM, SYSTEM FOR THE PRODUCTION OF ALUMINUM AND USE OF THE SYSTEM |
| EP16803825.5A EP3303644B1 (en) | 2015-06-01 | 2016-05-31 | A molten metal and powder adding and mixing system and a metal production system |
| PCT/NO2016/050110 WO2016195507A1 (en) | 2015-06-01 | 2016-05-31 | A molten metal and powder adding and mixing system and a metal production system |
| CN201680034109.4A CN108138259B (en) | 2015-06-01 | 2016-05-31 | Molten metal and powder addition and hybrid system and Metal Production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20150703A NO342536B1 (en) | 2015-06-01 | 2015-06-01 | A molten metal and powder adding and mixing system and a system for the production of metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO20150703A1 NO20150703A1 (en) | 2016-12-02 |
| NO342536B1 true NO342536B1 (en) | 2018-06-11 |
Family
ID=57440701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20150703A NO342536B1 (en) | 2015-06-01 | 2015-06-01 | A molten metal and powder adding and mixing system and a system for the production of metal |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3303644B1 (en) |
| CN (1) | CN108138259B (en) |
| BR (1) | BR112017025990B1 (en) |
| NO (1) | NO342536B1 (en) |
| WO (1) | WO2016195507A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO20210630A1 (en) * | 2021-05-21 | 2022-11-22 | Norsk Hydro As | Na removal from pot-room Al metal with under-pressure and forced convection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0521519A2 (en) * | 1991-07-05 | 1993-01-07 | VAW Aluminium AG | Method and device for analysis adjustment of reactive melts |
| NO319478B1 (en) * | 2004-09-21 | 2005-08-15 | Alu Innovation As | Method and apparatus for adding powder to a metal melt |
| WO2008010721A1 (en) * | 2006-07-04 | 2008-01-24 | Heggset Teknologi As | A method and device for admixture of powder in a liquid |
| WO2011021940A1 (en) * | 2009-08-21 | 2011-02-24 | Sør Norge Aluminium As | Method and apparatus for adding powder and gas in a melt |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT321340B (en) * | 1969-07-29 | 1975-03-25 | Voest Ag | Device for introducing fine-grained or liquid aggregates into liquid metals and process for the production of cast iron with a spherical graphite structure |
| US4034970A (en) * | 1976-01-28 | 1977-07-12 | General Motors Corporation | Method and device for nodularizing cast iron |
| US4191563A (en) * | 1976-03-08 | 1980-03-04 | Ford Motor Company | Continuous stream treatment of ductile iron |
| US4298377A (en) * | 1979-12-03 | 1981-11-03 | Union Carbide Corporation | Vortex reactor and method for adding solids to molten metal therewith |
| HU222031B1 (en) * | 1996-08-30 | 2003-03-28 | Energiagazdálkodási Rt. | Hydromechanical mixer for producing mixture from liquid and powder, or grain |
| CN102719856B (en) * | 2012-07-02 | 2013-06-05 | 福建省南平铝业有限公司 | Method for removing alkali metal via electrolytic aluminum liquid |
| CN203498454U (en) * | 2013-09-17 | 2014-03-26 | 北京南山航空材料研究院有限责任公司 | Novel high-efficiency aluminum alloy in-furnace solvent ejection refining tube nozzle |
-
2015
- 2015-06-01 NO NO20150703A patent/NO342536B1/en unknown
-
2016
- 2016-05-31 BR BR112017025990-7A patent/BR112017025990B1/en active IP Right Grant
- 2016-05-31 CN CN201680034109.4A patent/CN108138259B/en active Active
- 2016-05-31 EP EP16803825.5A patent/EP3303644B1/en active Active
- 2016-05-31 WO PCT/NO2016/050110 patent/WO2016195507A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0521519A2 (en) * | 1991-07-05 | 1993-01-07 | VAW Aluminium AG | Method and device for analysis adjustment of reactive melts |
| NO319478B1 (en) * | 2004-09-21 | 2005-08-15 | Alu Innovation As | Method and apparatus for adding powder to a metal melt |
| WO2008010721A1 (en) * | 2006-07-04 | 2008-01-24 | Heggset Teknologi As | A method and device for admixture of powder in a liquid |
| WO2011021940A1 (en) * | 2009-08-21 | 2011-02-24 | Sør Norge Aluminium As | Method and apparatus for adding powder and gas in a melt |
Also Published As
| Publication number | Publication date |
|---|---|
| BR112017025990B1 (en) | 2021-10-13 |
| EP3303644A1 (en) | 2018-04-11 |
| WO2016195507A1 (en) | 2016-12-08 |
| CN108138259B (en) | 2019-10-11 |
| EP3303644A4 (en) | 2019-03-13 |
| NO20150703A1 (en) | 2016-12-02 |
| EP3303644B1 (en) | 2021-04-21 |
| BR112017025990A2 (en) | 2018-08-14 |
| CN108138259A (en) | 2018-06-08 |
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