A melt protection device

Abstract

The invention discloses a melt protection device which comprises a gas-solid protection system and a liquid state protection system. The gas-solid protection system is used for providing gas state protecting gas protection and solid coverage agent protection for metal melt in a molten pool; and the liquid state protection system is used for providing liquid state protecting gas protection for the metal melt in the molten pool, and spraying a solid coverage agent. The melt protection device is characterized in that the gas-solid protection system comprises a two-phase flow spraying pipe, a ring cavity, a coverage agent bin and an air tank, and a liquid state protection gas spraying pipe and a liquid tank are further included. Gas-state, liquid-state and solid coverage agent protection can be provided for the metal melt in the molten pool through the gas-solid protection system and the liquid state protection system, the content of oxygen on the surface of the metal melt can be effectively reduced, and oxidation of the metal melt is avoided; and meanwhile, the using amount of the protection gas can be effectively reduced, and the production cost can be saved for an enterprise.

Description

technical field [0001] The invention belongs to the technical field of metal melt protection, and in particular relates to a melt protection device. Background technique [0002] Aluminum alloy smelting and casting processes are complex, and metals such as aluminum, magnesium, lithium, and zinc in aluminum alloys have relatively active characteristics. After adding lithium and magnesium to aluminum alloys, they react sharply with air and oxidize, making the molten state High-quality aluminum alloys are prone to chemical reactions with oxygen in the air, and the melt will burn and oxidize, so the protection of the melt is extremely difficult. [0003] In the prior art, argon gas is used to protect the environment to cast aluminum-lithium alloys, and the inert argon gas is heavier than air, and argon gas does not react with aluminum alloys to block the contact between the melt in the crystallizer and the air to achieve protection. The purpose of the melt. An argon gas tube i...

AI Technical Summary

Problems solved by technology

[0004] However, under the existing mold melt protection method, the argon space in the mold is not completely sealed, and the aluminum alloy casting process determines that the distance between the melt level and the upper edge of the mold is only 30 mm to 50 mm Height, the thickness of the protective argon layer is not enough, and the space that can accommodate the protective argon is very limited. In addition, during the casting process, it is necessary to open the protective cover from time to time to perform casting such as melt lubrication, slag removal, and observation in the mold. Operation, the protective argon deposited in the crystallizer is easy to float and escape, and the argon protective layer becomes thinner and discontinuous, which leads to the aluminum alloy melt being in contact with the air, the protection effect becomes poor, and the melt oxidizes; once the melt oxidation intensifies , the casting process will not continue due to severe oxidation, and the oxidized slag will also be involved in the ingot, which will open the protective cover more frequently for slag breaking and lubrication operations, and the melt is more likely to be oxidized, resulting in a vicious circle

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