EP2446065A1 - USE OF A BINARY SALT FLUX OF NaCl AND MgCI2 FOR THE PURIFICATION OF ALUMINUM OR ALUMINUM ALLOYS, AND METHOD THEREOF - Google Patents
USE OF A BINARY SALT FLUX OF NaCl AND MgCI2 FOR THE PURIFICATION OF ALUMINUM OR ALUMINUM ALLOYS, AND METHOD THEREOFInfo
- Publication number
- EP2446065A1 EP2446065A1 EP10785623A EP10785623A EP2446065A1 EP 2446065 A1 EP2446065 A1 EP 2446065A1 EP 10785623 A EP10785623 A EP 10785623A EP 10785623 A EP10785623 A EP 10785623A EP 2446065 A1 EP2446065 A1 EP 2446065A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- naci
- mgci
- weight
- aluminum
- particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 150000003839 salts Chemical class 0.000 title claims abstract description 76
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 39
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 28
- 238000000746 purification Methods 0.000 title claims abstract description 18
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title description 16
- 239000011780 sodium chloride Substances 0.000 title description 8
- 230000004907 flux Effects 0.000 claims abstract description 90
- 239000000203 mixture Substances 0.000 claims abstract description 39
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 26
- 239000007791 liquid phase Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 33
- 239000007788 liquid Substances 0.000 claims description 22
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 16
- 239000011777 magnesium Substances 0.000 claims description 16
- 229910052749 magnesium Inorganic materials 0.000 claims description 16
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 14
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000005496 eutectics Effects 0.000 claims 2
- 239000011575 calcium Substances 0.000 description 29
- 239000011734 sodium Substances 0.000 description 29
- 229910052708 sodium Inorganic materials 0.000 description 29
- 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 28
- 229910045601 alloy Inorganic materials 0.000 description 27
- 239000000956 alloy Substances 0.000 description 27
- 229910052791 calcium Inorganic materials 0.000 description 22
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 21
- 238000004458 analytical method Methods 0.000 description 12
- 238000013019 agitation Methods 0.000 description 11
- 239000012535 impurity Substances 0.000 description 10
- 239000000843 powder Substances 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 230000009467 reduction Effects 0.000 description 8
- 229910002804 graphite Inorganic materials 0.000 description 7
- 239000010439 graphite Substances 0.000 description 7
- 239000003513 alkali Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000001033 granulometry Methods 0.000 description 5
- 238000007670 refining Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 4
- 150000003841 chloride salts Chemical class 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000010587 phase diagram Methods 0.000 description 4
- 239000001103 potassium chloride Substances 0.000 description 4
- 235000011164 potassium chloride Nutrition 0.000 description 4
- 239000013543 active substance Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 159000000000 sodium salts Chemical class 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009626 Hall-Héroult process Methods 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000374 eutectic mixture Substances 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- -1 for example Inorganic materials 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 235000011167 hydrochloric acid Nutrition 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
Definitions
- the invention relates to the use of a binary salt flux comprising NaCI and MgCI 2 for the purification of a metal selected from the group consisting of aluminum and aluminum alloys, more particularly for the removal of alkali and alkaline-earth metals.
- the invention also relates to a method for the purification of said metal with said binary salt flux.
- Fluxes can be used to form a protecting layer at the surface of an alloy to prevent oxidation.
- fluxes contain chemical active agents, they can be used to clean furnace walls by softening accumulated layers of corundum. Some exothermic fluxes are also used for cleaning dross and removing aluminum trapped in oxide layers.
- Fluxes that are based on alkali chlorides and alkaline-earth chlorides are also used for the refining of alloys. Those skilled in the art generally define refining as the removal of alkali and alkaline-earth metals, non metallic inclusions and hydrogen from the alloys.
- Sodium and calcium are always present as impurities in aluminum obtained from the Hall-Heroult process. Lithium fluoride is often added to the electrolytic bath to improve the efficiency of cells. However, a small amount in the metallic state is found dissolved in the aluminum. These impurities entail quality issues. For example, in an alloy containing magnesium, the presence of sodium may interfere during the hot rolling processes. The presence of sodium in aluminum and silicon alloys neutralize the effect of phosphorus used for the refining of grains. For the above- mentioned reasons, the use of fluxes containing sodium is not recommended for aluminum and its alloys, more particularly for aluminum alloys comprising a magnesium content higher than 3 % by weight or a silicon content higher than 10 % by weight.
- the presence of hydrogen in too high concentration may lead to a too high porosity of the aluminum during its solidification.
- the presence of non metallic inclusions is important.
- MgCI 2 is one of the chemical active agents used for the withdrawal of impurities in alloys. Its concentration has a direct effect on the kinetic of withdrawal of calcium and sodium. Its melting point is 714°C, but in common fluxes, it is mixed with other salts to obtain a melting point between 400 and 550 0 C. However, MgCI 2 is hygroscopic and can not be exposed for a long period of time to the surrounding air. Fluxes obtained by fusion of salts comprising magnesium chloride have hygroscopic properties. Consequently, the packaging is an important factor in limiting the absorption of humidity during the manufacturing of such fluxes.
- US patent no. 1 ,377,374 relates to the use of a flux having an equimolar composition of sodium chloride and magnesium chloride for the production of manganese or magnesium alloys.
- US patent no. 1 ,754,788 relates to the use of this same flux in a process for the cleaning of magnesium.
- US patent no. 1 ,519,128 relates to the addition of calcium chloride to this composition and
- US patent no. 2,262,105 relates to the addition of potassium chloride and magnesium oxide in addition to the calcium chloride.
- US patent no. 5,405,427 mentions a flux based on sodium chloride, magnesium chloride, potassium chloride and carbon for the treatment of metal.
- the refining fluxes are usually composed of alkali chlorides or alkaline-earth chlorides, which are mixed to obtain melting points that are lower than the operating temperature of alloys - the melting point of pure compounds being usually quite high.
- US patent no. 4,099,965 relates to a method where a flux of KCI and MgCI 2 is added in solid form in the bottom of a preheated container before the addition of aluminum. More currently, fluxes are added by an inert gas in a pipe under the surface of the metal (lance fluxing). Recently, a method was developed where a hollow shaft brings the salt flux in the alloy with a gas carrier, and the salt flux is dispersed by an agitator (rotary flux injection). This method reduces the amount of salt flux required for carrying out the purification while increasing the dispersion of this salt flux in the alloy. Following the addition of a salt flux to the metal, impurities and salts float on the surface of the liquid metal and can be easily removed.
- the use of solid compounds obtained by melting of salts controls the granulometry.
- Particles may be used in batch processes or in continuous processes.
- salt fluxes such as binary mixtures of magnesium chloride and potassium chloride
- costs related to salt fluxes are high.
- the use of salt fluxes having a substantial content in sodium chloride is not recommended by those skilled in the art due to perceived negative effects of sodium content in the resulting aluminum or aluminum alloys.
- sodium chloride when sodium chloride is present in fluxes for the purification of aluminum or aluminum alloys, those skilled in the art currently will avoid or limit the use of sodium chloride. More particularly, in the case of certain kinds of alloys such as, for example, aluminum alloys having silicon content higher than 10% by weight and more particularly aluminum alloys having magnesium content higher than 3% by weight, those skilled in the art currently recommend not using sodium chloride in salt flux.
- Embodiments of the present invention show the following advantages:
- a first preferred aspect of the invention relates to the use of a salt flux for the purification of a metal selected from the group consisting of aluminum and aluminum alloys, said metal being in liquid phase and said salt flux being a binary mixture of NaCI and MgCI 2 .
- a second preferred aspect of the invention relates to a method for the purification of a metal selected from the group consisting of aluminum and aluminum alloys, wherein said method comprises:
- Another embodiment of the invention relates to a use or a method as defined hereinabove, wherein more than 22 % by weight of said binary mixture consists of NaCI.
- Another embodiment of the invention relates to a use or a method as defined hereinabove, wherein the salt flux:
- • is a binary mixture of particles of NaCI and particles of MgCI 2 ;
- Another embodiment of the invention relates to a use or a method as defined in any one of the above-mentioned embodiments, wherein the binary mixture comprises: a) from 40 to 50% by weight of NaCI; and b) from 50 to 60% by weight of MgCI 2 . More particularly, this binary mixture comprises 45% by weight of NaCI and 55% by weight of MgCI 2 to form an eutectic mixture having a melting point of about 439°C.
- Another embodiment of the invention relates to a use or a method as defined in any one of the above-mentioned embodiments, wherein when the salt flux is in the form of particles, those particles have an average particle size between 100 ⁇ m and 3.35 mm.
- said particles may have a particle size between 0.85 mm and 3.15 mm or between 100 ⁇ m and 1 mm.
- Another embodiment of the invention relates to a use or a method as defined in any one of the above-mentioned embodiments, wherein the particles are contacted with the liquid metal by injection with a gas injection equipment.
- a gas injection equipment may consist of a rotary injector known under the tradename SNIF PHD-50 commercialized by the Applicant.
- Another embodiment of the invention relates to a use or a method as defined in any one of the above-mentioned embodiments, wherein the metal is an aluminum alloy having a magnesium content higher than 3% by weight.
- Another embodiment of the invention relates to a use or a method as defined in any one of the above-mentioned embodiments, wherein the metal is an aluminum alloy having a silicon content higher than 10% by weight.
- Figure 1 a phase diagram of a fused salt KCI/NaCI/MgCI 2 ;
- Figure 4 a comparative graphic concerning examples 5 to 8.
- Formulations based on NaCI and MgCI 2 proposed according to the present invention show melting points that are lower than those of salt flux compositions sold by the Applicant under the trademark Promag (40 wt % KCI, 60 wt % MgCI 2 ), for equivalent amounts of MgCI 2 which is the chemically active agent for the withdrawal of impurities.
- the lowering of melting points represents a lowering of energy costs when melting the solid salt flux.
- example 1 illustrates an unexpected effect with regard to the sodium concentration in an aluminum alloy when NaCI is added in a liquid aluminum alloy, that is, no increase of the sodium content in the alloy obtained.
- each salt flux was made by mixing the salts in an anhydrous solid phase in an appropriate oven. Then, by increasing the temperature of the oven, a fused compound in liquid form was obtained. The liquid was then cooled down quickly, grinded and sifted to obtain a granulometry that was appropriate for the selected method.
- the salt flux was made only by mixing the salts in an anhydrous solid phase.
- Salt fluxes have shown an optimal efficiency for the withdrawal of Ca, Na and Li when used with a rotary injector such as a SNIF PHD-50 (tradename) commercialized by the Applicant (Pyrotek).
- a rotary injector such as a SNIF PHD-50 (tradename) commercialized by the Applicant (Pyrotek).
- concentrations of salt fluxes required to carry out the purification may vary depending on the selected method.
- a salt flux consisting of a binary mixture of 45 wt % NaCI and 55 wt % MgCI 2 were agitated in 1.5 kg of a liquid AA1100 aluminum alloy (sold under the trademark Alcan) in which 5 wt % of magnesium were added.
- the crucible was maintained at 72O 0 C during 90 minutes and samples were taken every 30 minutes.
- the sodium level in the crucible was maintained at a minimal level of 3 ppm during the whole experiment, showing that an addition of a flux comprising NaCI does not involve an absorption of sodium in an aluminum alloy with high magnesium content.
- the salt flux was prepared from NaCI in powder form and sold under the trademark SIFTO INDUSTRIAL and MgCI 2 in flake form and sold under the trademark SKYLINE.
- a salt flux consisting of a ternary mixture of 20 wt % NaCI, 20 wt % KCI and 60 wt % MgCI 2 were agitated and added in 1.5 kg of a liquid AA1100 aluminum alloy (sold under the trademark Alcan) in which 5 wt % of magnesium were added.
- the crucible was maintained at 720 0 C during 90 minutes and samples were taken every 30 minutes.
- the sodium level in the crucible was maintained at a minimal level of 3 ppm during the whole experiment, showing that an addition of a ternary flux comprising a small amount of NaCI does not involve an absorption of sodium in an aluminum alloy with high magnesium content.
- the salt flux was prepared from NaCI in powder form and sold under the trademark SIFTO INDUSTRIAL, KCI in powder form and sold under the trademark IMC KALIUM and MgCI 2 in flake form and sold under the trademark SKYLINE.
- Example 4 Example 4:
- salt flux made of 45 wt % NaCI and 55 wt % MgCI 2 were added to the resulting alloy while agitating it in order to further purify it.
- the salt flux was prepared from NaCI in powder form and sold under the trademark SIFTO INDUSTRIAL and MgCI 2 in flake form and sold under the trademark SKYLINE.
- the liquid mixture obtained was then poured into an enamelled-coated bowl for quick solidification.
- the salt flux obtained was then grinded with in a mortar and sifted.
- a salt flux Fifty grams of a salt flux were prepared in a small alumina crucible by mixing 10 grams of NaCI in powder form and sold under the trademark SIFTO INDUSTRIAL, 10 grams of KCI in powder form and sold under the trademark IMC KALIUM, and 30 grams of MgCI 2 in flake form and sold under the trademark SKYLINE. The mixture was subjected to a temperature of 55O 0 C during 45 minutes. The liquid mixture obtained was then poured into an enamelled-coated bowl for quick solidification. The salt flux obtained was then grinded in a mortar and sifted. The fraction having a particle size lower than 3150 microns and higher than 105 microns was recovered.
- Fifty grams of a salt flux were prepared only by mixing 22.5 grams of NaCI in powder form and sold under the trademark SIFTO INDUSTRIAL with a granulometry 95% lower than 840 microns and 95 % higher than 300 microns, and 27.5 grams of MgCI 2 in flake form and sold under the trademark SKYLINE with a granulometry 90 % lower than 4.7 mm and 85 % higher to 1 mm.
- PROMAG SI (trademark) formed of 40 wt % KCI and 60 wt % MgCI 2 , with a granulometry 99% lower than 3150 microns and 95 % higher than 850 microns, were added to the alloy doped with calcium while agitating for 2 minutes. The agitation was stopped and samples were later taken immediately after the end of the agitation as well as 30, 60 and 90 minutes later.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2668473A CA2668473C (en) | 2009-06-08 | 2009-06-08 | Use of a binary salt flux of nacl and mgcl2 for the purification of aluminum or aluminum alloys, and method thereof |
PCT/CA2010/000866 WO2010142025A1 (en) | 2009-06-08 | 2010-06-08 | USE OF A BINARY SALT FLUX OF NaCl AND MgCI2 FOR THE PURIFICATION OF ALUMINUM OR ALUMINUM ALLOYS, AND METHOD THEREOF |
Publications (4)
Publication Number | Publication Date |
---|---|
EP2446065A1 true EP2446065A1 (en) | 2012-05-02 |
EP2446065A4 EP2446065A4 (en) | 2017-03-15 |
EP2446065B1 EP2446065B1 (en) | 2020-12-16 |
EP2446065B2 EP2446065B2 (en) | 2024-02-21 |
Family
ID=43308339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10785623.9A Active EP2446065B2 (en) | 2009-06-08 | 2010-06-08 | USE OF A BINARY SALT FLUX OF NaCl AND MgCI2 FOR THE PURIFICATION OF ALUMINUM OR ALUMINUM ALLOYS, AND METHOD THEREOF |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP2446065B2 (en) |
JP (1) | JP2012529565A (en) |
CN (1) | CN102459663A (en) |
AU (1) | AU2010258042B2 (en) |
BR (1) | BRPI1015440A2 (en) |
CA (1) | CA2668473C (en) |
ES (1) | ES2862528T3 (en) |
RU (1) | RU2011147513A (en) |
WO (1) | WO2010142025A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013013321A1 (en) * | 2011-07-28 | 2013-01-31 | Pyrotek Inc. | Use of a tertiary salt flux of nac1, kcl, and mgc12 for the purification of aluminum or aluminum alloys, and method thereof |
CN104831079B (en) * | 2015-05-13 | 2016-08-31 | 上海交通大学 | Segregation method refined aluminium effectively removes the method for vanadium in purifying |
CN104862496A (en) * | 2015-05-13 | 2015-08-26 | 上海交通大学 | Melt composite treatment agent for segregation method refined aluminium purification and preparation method thereof |
CN105177335B (en) * | 2015-09-15 | 2017-03-22 | 沈阳航空航天大学 | Alloy element additive used for aluminum alloy production and preparation method thereof |
CN105177311A (en) * | 2015-09-15 | 2015-12-23 | 沈阳航空航天大学 | Sodium-chloride-salt-containing fusion used for aluminum melt treatment and production method of sodium-chloride-salt-containing fusion |
IT201700074924A1 (en) * | 2017-07-04 | 2019-01-04 | Foundry Ecocer S R L | Flux for melting the molten metal. |
CA3031491C (en) * | 2019-01-03 | 2020-03-24 | 2498890 Ontario Inc. | Systems, methods, and cored wires for treating a molten metal |
CN115198106B (en) * | 2022-07-08 | 2023-08-29 | 中国铝业股份有限公司 | Aluminum extraction refining agent for aluminum ash and preparation method and use method thereof |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1377374A (en) | 1918-07-24 | 1921-05-10 | Dow Chemical Co | Manganese-magnesium alloy and method of making same |
US1476192A (en) * | 1921-11-26 | 1923-12-04 | Dow Chemical Co | Method of casting light metal alloys |
US1519128A (en) | 1923-07-09 | 1924-12-16 | Dow Chemical Co | Flux for magnesium and alloys thereof |
US1754788A (en) | 1923-07-13 | 1930-04-15 | Dow Chemical Co | Purifying light-metal alloys |
US2262105A (en) | 1939-11-20 | 1941-11-11 | Magnesium Elektron Ltd | Flux for use in the treatment of light metal |
FR2325727A1 (en) | 1975-09-26 | 1977-04-22 | Servimetal | FLOWS FOR THE REMOVAL OF ALKALINE AND ALKALINO-EARTH METALS FROM ALUMINUM AND ITS ALLOYS AND PROCESSING METHODS |
CH599979A5 (en) * | 1976-12-21 | 1978-06-15 | Alusuisse | |
JPS5336965Y2 (en) * | 1977-10-04 | 1978-09-08 | ||
GB8322020D0 (en) * | 1983-08-16 | 1983-09-21 | Alcan Int Ltd | Filtering molten metal |
EP0134705B1 (en) * | 1983-08-16 | 1988-07-27 | Alcan International Limited | Method of filtering molten metal |
CN86105578A (en) * | 1986-07-19 | 1988-02-24 | 江苏工学院 | Refining modification fluxing agent |
JP2927476B2 (en) * | 1989-12-29 | 1999-07-28 | 株式会社ショーワ | Flux supply device |
CN1026709C (en) * | 1991-12-16 | 1994-11-23 | 东北工学院 | Slag remover for refining Al or Al alloy |
US5405427A (en) | 1994-05-18 | 1995-04-11 | Eckert; C. Edward | Salt flux for addition to molten metal adapted for removing constituents therefrom and methods of using |
US5427602A (en) * | 1994-08-08 | 1995-06-27 | Aluminum Company Of America | Removal of suspended particles from molten metal |
CN1195084C (en) * | 2001-12-27 | 2005-03-30 | 上海交通大学 | Filtering process of eliminating non-metallic foreign impurity ion aluminium melt |
BRPI0416685B1 (en) * | 2003-11-19 | 2013-07-09 | method for cooling a molten metal at most partially solidified during fractional crystallization | |
JP4584682B2 (en) * | 2004-11-12 | 2010-11-24 | ヤマハ発動機株式会社 | Method for removing oxide from casting aluminum alloy |
-
2009
- 2009-06-08 CA CA2668473A patent/CA2668473C/en active Active
-
2010
- 2010-06-08 WO PCT/CA2010/000866 patent/WO2010142025A1/en active Application Filing
- 2010-06-08 CN CN201080025076XA patent/CN102459663A/en active Pending
- 2010-06-08 ES ES10785623T patent/ES2862528T3/en active Active
- 2010-06-08 EP EP10785623.9A patent/EP2446065B2/en active Active
- 2010-06-08 JP JP2012514304A patent/JP2012529565A/en active Pending
- 2010-06-08 BR BRPI1015440A patent/BRPI1015440A2/en not_active IP Right Cessation
- 2010-06-08 RU RU2011147513/02A patent/RU2011147513A/en not_active Application Discontinuation
- 2010-06-08 AU AU2010258042A patent/AU2010258042B2/en active Active
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AU2010258042B2 (en) | 2014-01-23 |
EP2446065A4 (en) | 2017-03-15 |
CA2668473A1 (en) | 2010-12-08 |
CA2668473C (en) | 2014-08-19 |
CN102459663A (en) | 2012-05-16 |
EP2446065B2 (en) | 2024-02-21 |
BRPI1015440A2 (en) | 2018-07-17 |
ES2862528T3 (en) | 2021-10-07 |
AU2010258042A1 (en) | 2011-12-22 |
EP2446065B1 (en) | 2020-12-16 |
JP2012529565A (en) | 2012-11-22 |
WO2010142025A1 (en) | 2010-12-16 |
RU2011147513A (en) | 2013-07-20 |
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