Multi-furnace combined type fusion casting equipment and technology for producing high-cleanness magnesium or magnesium alloy

Abstract

The invention discloses multi-furnace combined type fusion casting equipment and a technology for producing high-cleanness magnesium or a high-cleanness magnesium alloy, and belongs to the technical field of metal smelting. The equipment adopts a plurality of smelting furnaces and mating crucibles for combined operation, and the smelting furnaces consist of a melting furnace, a purifying furnace and a heat preservation holding furnace; the melting furnace and the crucible of the melting furnace are used for melting magnesium or the magnesium alloy; a magnesium melt or a magnesium alloy melt is transferred to the purifying furnace and the crucible of the purifying furnace through an insulating pipeline, and penetrates through a screen mesh structure submerged in a molten flux and a flux layer, and occluded foreign substances in the magnesium melt or the magnesium alloy melt are removed cleanly; and the purified melt is transferred to the heat preservation holding furnace and the crucible of the heat preservation holding furnace through an insulating pipeline for subsequent operation. The magnesium melt or the magnesium alloy melt is purified thoroughly, the operation difficulty of an operation worker is lowered, continuous automatic production can be realized, the production efficiency is high, and the technology has lower pollution to the environment than a traditional technology.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a multi-furnace combined melting and casting equipment and process for producing high-cleanliness magnesium or magnesium alloys. Background technique [0002] Magnesium or magnesium alloy has a series of excellent properties such as low density, high specific strength, strong electromagnetic shielding, high damping and shock absorption performance, excellent thermal conductivity, high dimensional stability, excellent casting performance, good processing performance, and rich reserves. It has been rapidly developed in industries such as electronic products, transportation, aerospace and weapon manufacturing. [0003] The current magnesium alloy melting and casting equipment can be divided into non-flux smelting type and flux refining and purification type according to the melt treatment process. The flux-free smelting type is usually used for melt preparation in the produc...

AI Technical Summary

Problems solved by technology

The disadvantages of the current non-flux smelting equipment are: there are many inclusions suspended in the melt and the density difference from the melt is not large, and the removal of small inclusions is not thorough only by means of natural settlement, floating or filtering by gravity. , so there are many inclusions in die-casting products, which can only be used for non-structural civil products that do not bear force

Among them, the disadvantages of tilting pouring are: there are still suspended fine inclusions in the melt, which will flow out with the molten magnesium; the shaking of the crucible may cause damage to the protective layer of the flux on the surface, resulting in oxidation of the melt; inclusions deposited at the bottom of the crucible may also flow out with the molten magnesium. Flow pouring into castings, process control is difficult; workers need long-term training, careful operation; there is a certain risk and environmental pollution caused by smoke

Relatively speaking, the insulation pipeline conveying type pouring is more advanced, but limited by the refining method, it is still unable to completely remove the suspended fine inclusions remaining in the magnesium liquid

[0005] It can be seen from the above that the two magnesium or magnesium alloy casting processes and equipment currently used in industry cannot produce high-clean magnesium or magnesium alloy melts, and more advanced equipment and processes need to be developed

Images