A device and method for direct preparation of aluminum alloy by molten salt electrolysis-casting

Abstract

The invention provides a device and a method for directly preparing aluminum alloy through molten salt electrolysis-casting, belonging to the technical field of electrolysis metallurgy. The device consists of an electrolytic bath system and a casting system below the electrolytic bath system; a casting channel and a bottom opening channel are communicated; the method comprises the following steps: (1) adding a cathode master alloy and molten salt electrolyte into a graphite crucible, and heating and melting; adding electrolysis raw materials and evenly mixing with the molten salt electrolyte; (2) dipping a graphite anode into the molten salt electrolyte; (3) plugging a potential testing probe into a molten cathode master alloy; (4) electrifying for electrolysis, and stopping after a reading on a voltmeter reaches a target value; (5) vacuumizing a casting heating furnace or leading in inert gas, and heating to 650-750DEG C; and (6) opening a bottom-opening cock of the graphite crucible, enabling an aluminum alloy melt to enter a die, performing electromagnetic stirring, and solidifying to obtain an aluminum alloy ingot. The method and device are convenient to operate, the method is simple and easy compared with the traditional method, and the prepared aluminum alloy is even in component distribution and meets the requirement, thus having excellent application prospects.

Description

technical field

[0001] The invention belongs to the technical field of electrolytic metallurgy, in particular to a device and method for directly preparing aluminum alloy by molten salt electrolysis-casting. Background technique

[0002] Aluminum-lithium alloy has a series of advantages such as light specific gravity, high strength and elastic modulus, corrosion resistance, high temperature and ultra-low temperature resistance, and high specific rigidity, so it is widely used in aerospace and defense space and other fields. Aluminum-magnesium alloy has the advantages of light weight, good heat dissipation and strong compression resistance, and is widely used in construction, packaging, ships and other fields.

[0003] The traditional production of aluminum alloys mainly adopts the method of blending, in which aluminum and high-purity metals are smelted together according to a certain ratio, and cast into aluminum alloys. The process is long, the equipment is complicated, th...

Examples

Embodiment 1

[0048] A device for directly preparing aluminum alloys by molten salt electrolysis-casting such as figure 1 as shown,

[0049] Consists of the electrolyzer system and the casting system below it;

[0050] The electrolytic cell system includes an electrolytic heating furnace 14, an electrolytic iron crucible 4, a graphite crucible 6, a graphite anode 10 and a potential test probe 7; the electrolytic iron crucible 4 is located in the electrolytic heating furnace, and the electrolytic iron crucible 4 is set outside the graphite crucible 6. 6 The side wall is provided with a corundum insulating liner 32; the graphite anode 10 and the potential test probe 7 are inserted into the graphite crucible 6; the bottom of the graphite crucible 6 is provided with a bottom opening channel 30 and a bottom opening cock 5, and the bottom opening channel 30 passes through the electrolytic Iron crucible 4 is communicated with electrolytic heating furnace 14 bottoms;

[0051] The casting system i...

Embodiment 2

[0080] The device for directly preparing aluminum alloy by molten salt electrolysis-casting is the same as in Example 1;

[0081] The method of directly preparing aluminum alloy by molten salt electrolysis-casting is the same as that of Example 1, the difference is that:

[0082] Preparation of the aluminum-lithium alloy whose grade is 2397: prepare other metals except lithium according to the ratio of each element in the 2397 aluminum-lithium alloy, as the cathode master alloy;

[0083] Add the cathode master alloy and the molten salt electrolyte into the graphite crucible, heat the cathode master alloy and the molten salt electrolyte through the electrolytic heating furnace until they are completely melted, and then continue to heat to 30°C higher than the full melting temperature;

[0084] The amount of the cathode master alloy added is twice the weight of the cathode master alloy according to the molten salt electrolyte and electrolytic raw materials;

[0085] The addition ...

Embodiment 3

[0092] The device for directly preparing aluminum alloy by molten salt electrolysis-casting is the same as in Example 1;

[0093] The method of directly preparing aluminum alloy by molten salt electrolysis-casting is the same as that of Example 1, the difference is that:

[0094] Preparation of the aluminum-lithium alloy whose grade is 2197: prepare other metals except lithium according to the ratio of each element in the 2197 aluminum-lithium alloy, as the cathode master alloy;

[0095] Add the cathode master alloy and molten salt electrolyte into the graphite crucible, heat the cathode master alloy and molten salt electrolyte through the electrolytic heating furnace until they are completely melted, and then continue to heat to 40°C higher than the full melting temperature;

[0096] The amount of the cathode master alloy added is 1.8 times the weight of the cathode master alloy according to the molten salt electrolyte and electrolytic raw materials;

[0097] The amount of e...

technical field

[0001] The invention belongs to the technical field of electrolytic metallurgy, in particular to a device and method for directly preparing aluminum alloy by molten salt electrolysis-casting. Background technique

[0002] Aluminum-lithium alloy has a series of advantages such as light specific gravity, high strength and elastic modulus, corrosion resistance, high temperature and ultra-low temperature resistance, and high specific rigidity, so it is widely used in aerospace and defense space and other fields. Aluminum-magnesium alloy has the advantages of light weight, good heat dissipation and strong compression resistance, and is widely used in construction, packaging, ships and other fields.

[0003] The traditional production of aluminum alloys mainly adopts the method of blending, in which aluminum and high-purity metals are smelted together according to a certain ratio, and cast into aluminum alloys. The process is long, the equipment is complicated, th...

Examples

Embodiment 1

[0048] A device for directly preparing aluminum alloys by molten salt electrolysis-casting such as figure 1 as shown,

[0049] Consists of the electrolyzer system and the casting system below it;

[0050] The electrolytic cell system includes an electrolytic heating furnace 14, an electrolytic iron crucible 4, a graphite crucible 6, a graphite anode 10 and a potential test probe 7; the electrolytic iron crucible 4 is located in the electrolytic heating furnace, and the electrolytic iron crucible 4 is set outside the graphite crucible 6. 6 The side wall is provided with a corundum insulating liner 32; the graphite anode 10 and the potential test probe 7 are inserted into the graphite crucible 6; the bottom of the graphite crucible 6 is provided with a bottom opening channel 30 and a bottom opening cock 5, and the bottom opening channel 30 passes through the electrolytic Iron crucible 4 is communicated with electrolytic heating furnace 14 bottoms;

[0051] The casting system i...

Embodiment 2

[0080] The device for directly preparing aluminum alloy by molten salt electrolysis-casting is the same as in Example 1;

[0081] The method of directly preparing aluminum alloy by molten salt electrolysis-casting is the same as that of Example 1, the difference is that:

[0082] Preparation of the aluminum-lithium alloy whose grade is 2397: prepare other metals except lithium according to the ratio of each element in the 2397 aluminum-lithium alloy, as the cathode master alloy;

[0083] Add the cathode master alloy and the molten salt electrolyte into the graphite crucible, heat the cathode master alloy and the molten salt electrolyte through the electrolytic heating furnace until they are completely melted, and then continue to heat to 30°C higher than the full melting temperature;

[0084] The amount of the cathode master alloy added is twice the weight of the cathode master alloy according to the molten salt electrolyte and electrolytic raw materials;

[0085] The addition ...

Embodiment 3

[0092] The device for directly preparing aluminum alloy by molten salt electrolysis-casting is the same as in Example 1;

[0093] The method of directly preparing aluminum alloy by molten salt electrolysis-casting is the same as that of Example 1, the difference is that:

[0094] Preparation of the aluminum-lithium alloy whose grade is 2197: prepare other metals except lithium according to the ratio of each element in the 2197 aluminum-lithium alloy, as the cathode master alloy;

[0095] Add the cathode master alloy and molten salt electrolyte into the graphite crucible, heat the cathode master alloy and molten salt electrolyte through the electrolytic heating furnace until they are completely melted, and then continue to heat to 40°C higher than the full melting temperature;

[0096] The amount of the cathode master alloy added is 1.8 times the weight of the cathode master alloy according to the molten salt electrolyte and electrolytic raw materials;

[0097] The amount of e...

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