CN117626074A - Low-cost magnesium-lithium alloy and preparation method thereof - Google Patents
Low-cost magnesium-lithium alloy and preparation method thereof Download PDFInfo
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- CN117626074A CN117626074A CN202311655965.XA CN202311655965A CN117626074A CN 117626074 A CN117626074 A CN 117626074A CN 202311655965 A CN202311655965 A CN 202311655965A CN 117626074 A CN117626074 A CN 117626074A
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- Prior art keywords
- lithium
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- magnesium
- metal
- low
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- 229910000733 Li alloy Inorganic materials 0.000 title claims abstract description 23
- 239000001989 lithium alloy Substances 0.000 title claims abstract description 23
- GCICAPWZNUIIDV-UHFFFAOYSA-N lithium magnesium Chemical compound [Li].[Mg] GCICAPWZNUIIDV-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 17
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 17
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 15
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 14
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 12
- 239000011701 zinc Substances 0.000 claims abstract description 12
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims abstract description 10
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 claims abstract description 10
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 8
- 239000011777 magnesium Substances 0.000 claims abstract description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 6
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 6
- 239000011575 calcium Substances 0.000 claims abstract description 6
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims abstract description 5
- 229910052808 lithium carbonate Inorganic materials 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 238000003723 Smelting Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 2
- 238000011946 reduction process Methods 0.000 abstract 1
- 239000000956 alloy Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000013070 direct material Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a low-cost magnesium-lithium alloy and a preparation method thereof, and the low-cost magnesium-lithium alloy material comprises the following components in percentage by mass: 9.5 to 10.5 percent of lithium, 2.5 to 3.5 percent of aluminum, 2.5 to 3.5 percent of zinc, 0 to 0.5 percent of calcium, 0 to 0.5 percent of cadmium, 0.5 to 1.0 percent of cerium and the balance of magnesium, wherein the lithium is added in a mode of mixed lithium salt, and the mixed lithium salt comprises 65 to 75 percent of lithium carbonate, 10 to 20 percent of lithium chloride and 8 to 15 percent of lithium fluoride. The invention prepares the magnesium-lithium alloy with the required components by using the low-cost mixed lithium salt raw material through a high-temperature thermal reduction process in one step in a vacuum environment, and can greatly reduce the preparation cost of the magnesium-lithium alloy.
Description
Technical Field
The invention relates to the field of nonferrous metal production, in particular to a preparation method of a low-cost magnesium-lithium alloy.
Background
The magnesium-lithium alloy is used as the lightest metal structural material, has remarkable light weight advantage in the application fields of aerospace, weapons, automobiles, consumer electronics and the like, and can replace aluminum alloy, composite materials and the like to meet the weight reduction requirement. At present, the magnesium-lithium alloy industrial production adopts a vacuum smelting process, high-purity metal magnesium and metal lithium are adopted as raw materials, and other alloying elements such as aluminum, zinc and the like are added. Because of the special smelting process of the magnesium-lithium alloy, and most importantly, the high price of raw materials, especially lithium metal, leads the price of the commercial magnesium-lithium alloy to be far higher than that of common magnesium alloy and aluminum alloy materials, and the popularization and application of the commercial magnesium-lithium alloy are limited.
Therefore, how to reduce the production cost of the magnesium-lithium alloy, so that the magnesium-lithium alloy has a price with higher market competitiveness, is an important problem to be solved at present.
Disclosure of Invention
The invention provides a preparation method of a low-cost magnesium-lithium alloy, which can greatly reduce the production cost of the magnesium-lithium alloy by adopting the production mode.
The technical scheme of the invention is as follows: the invention relates to a low-cost magnesium-lithium alloy, which is characterized in that: the low-cost magnesium-lithium alloy material comprises the following components in percentage by mass: 9.5 to 10.5 percent of lithium, 2.5 to 3.5 percent of aluminum, 2.5 to 3.5 percent of zinc, 0 to 0.5 percent of calcium, 0 to 0.5 percent of cadmium, 0.5 to 1.0 percent of cerium and the balance of magnesium, wherein the lithium is added in a mode of mixed lithium salt, and the mixed lithium salt comprises 65 to 75 percent of lithium carbonate, 10 to 20 percent of lithium chloride and 8 to 15 percent of lithium fluoride.
The method for preparing the low-cost magnesium-lithium alloy is characterized by comprising the following steps of: the method comprises the following steps:
1) Mixing lithium salt, magnesium metal, aluminum metal and zinc metal raw materials according to a proportion, heating up and vacuumizing after the raw materials are put into a vacuum furnace, and adopting electromagnetic stirring in the whole smelting process;
2) Heating to 650-700 ℃ after the furnace burden is completely melted, preserving heat for 20-30 min, and then adding the rest components;
3) Heating to 650-750 ℃ to refine the melt for 10-15 min;
4) Cooling to 650-700 deg.c, setting for 30-40 min and casting.
The beneficial effects of the invention are as follows:
1) The method is simple to operate, the reaction process is stable and controllable, and the production cost of the magnesium-lithium alloy is reduced by more than 50%;
2) The invention has low reaction temperature, reduced lithium oxidation and evaporation tendency and low lithium loss.
Detailed Description
The present invention will be described in further detail with reference to specific comparative examples and examples:
comparative example
The comparative example uses a pure metal adding mode with the smelting amount of 100Kg, the adding amount of each component is 14Kg of metal lithium, 3.5Kg of metal aluminum, 2.6Kg of metal zinc, 0.25Kg of metal calcium, 0.2Kg of metal cadmium, 0.8Kg of metal cerium and 80Kg of metal magnesium, and the adding method is prepared by adopting a vacuum smelting process as follows:
1) According to the main component proportion, charging raw materials of metal lithium, metal magnesium, metal aluminum and metal zinc into a vacuum furnace, heating and vacuumizing, and adopting electromagnetic stirring in the whole smelting process;
2) Heating to 700 ℃ after the furnace burden is completely melted, and adding the rest components;
3) Heating to 740 ℃ to refine the melt for 10min;
4) Cooling to 680 ℃, standing for 40min, and then pouring.
The cast samples were subjected to component analysis to calculate lithium yields and direct material costs, with the following results:
example 1
In example 1, 100Kg of smelting amount is added in a mode of mixed lithium salt, other raw materials are added in a mode of pure metal, and the addition amounts of each component are 75Kg of mixed lithium salt, 3.5Kg of metallic aluminum, 2.6Kg of metallic zinc, 0.25Kg of metallic calcium, 0.2Kg of metallic cadmium, 0.8Kg of metallic cerium and 78Kg of metallic magnesium. The composition of the mixed lithium salt is as follows: the mass percentage of lithium chloride is 14%, the mass percentage of lithium fluoride is 13%, and the mass percentage of lithium carbonate is 73%. The method for preparing the alloy by adopting the vacuum melting technology comprises the following steps:
1) Mixing lithium salt, magnesium metal, aluminum metal and zinc metal raw materials according to a proportion, heating up and vacuumizing after the raw materials are put into a vacuum furnace, and adopting electromagnetic stirring in the whole smelting process;
2) Heating to 670 ℃ after the furnace burden is completely melted, preserving heat for 30min, and then adding the rest components;
3) Heating to 700 ℃ to refine the melt for 10min;
4) Cooling to 680 ℃, standing for 40min, and then pouring.
The cast samples were subjected to component analysis to calculate lithium yields and direct material costs, with the following results:
example 2
In example 2, 100Kg of smelting amount is added in a mode of mixed lithium salt, other raw materials are added in a mode of pure metal, and the addition amounts of each component are 70Kg of mixed lithium salt, 3.5Kg of metallic aluminum, 2.6Kg of metallic zinc, 0.25Kg of metallic calcium, 0.2Kg of metallic cadmium, 0.8Kg of metallic cerium and 75Kg of metallic magnesium. The composition of the mixed lithium salt is as follows: the lithium chloride accounts for 10 percent, the lithium fluoride accounts for 15 percent, and the lithium carbonate accounts for 75 percent. The method for preparing the alloy by adopting the vacuum melting technology comprises the following steps:
1) Mixing lithium salt, magnesium metal, aluminum metal and zinc metal raw materials according to a proportion, heating up and vacuumizing after the raw materials are put into a vacuum furnace, and adopting electromagnetic stirring in the whole smelting process;
2) Heating the furnace burden to 690 ℃ after the furnace burden is completely melted, preserving heat for 20min, and then adding the rest components;
3) Heating to 700 ℃ to refine the melt for 10min;
4) Cooling to 650 ℃, standing for 40min, and then pouring.
The cast samples were subjected to component analysis to calculate lithium yields and direct material costs, with the following results:
the technical matters not specifically described in the foregoing embodiments are the same as those in the prior art.
The present invention is not limited to the above-described embodiments, and the present invention can be implemented with the above-described advantageous effects.
The above is only a specific embodiment disclosed in the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention should be defined by the claims.
Claims (2)
1. A low cost magnesium lithium alloy, characterized by: the low-cost magnesium-lithium alloy material comprises the following components in percentage by mass: 9.5 to 10.5 percent of lithium, 2.5 to 3.5 percent of aluminum, 2.5 to 3.5 percent of zinc, 0 to 0.5 percent of calcium, 0 to 0.5 percent of cadmium, 0.5 to 1.0 percent of cerium and the balance of magnesium, wherein the lithium is added in a mode of mixed lithium salt, and the mixed lithium salt comprises 65 to 75 percent of lithium carbonate, 10 to 20 percent of lithium chloride and 8 to 15 percent of lithium fluoride.
2. A method of making the low cost magnesium lithium alloy of claim 1, wherein: the method comprises the following steps:
1) Mixing lithium salt, magnesium metal, aluminum metal and zinc metal raw materials according to a proportion, heating up and vacuumizing after the raw materials are put into a vacuum furnace, and adopting electromagnetic stirring in the whole smelting process;
2) Heating to 650-700 ℃ after the furnace burden is completely melted, preserving heat for 20-30 min, and then adding the rest components;
3) Heating to 700-750 ℃ to refine the melt for 10-15 min;
4) Cooling to 650-700 deg.c, setting for 30-40 min and casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311655965.XA CN117626074A (en) | 2023-12-05 | 2023-12-05 | Low-cost magnesium-lithium alloy and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311655965.XA CN117626074A (en) | 2023-12-05 | 2023-12-05 | Low-cost magnesium-lithium alloy and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117626074A true CN117626074A (en) | 2024-03-01 |
Family
ID=90023118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311655965.XA Pending CN117626074A (en) | 2023-12-05 | 2023-12-05 | Low-cost magnesium-lithium alloy and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117626074A (en) |
-
2023
- 2023-12-05 CN CN202311655965.XA patent/CN117626074A/en active Pending
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