A kind of molten magnesium casting holding furnace

Abstract

The invention discloses a molten magnesium casting heat-insulation furnace. The molten magnesium casting heat-insulation furnace comprises a furnace cavity and a liquid-level balance controller. The furnace cavity is sequentially divided into three cavities, that is, a transfer cavity, a standing cavity and a casting cavity, the three cavities are partitioned through partitions, and a connection hole is formed in the middle of each partition; the liquid-level balance controller is vertically inserted in the standing cavity and comprises three probes, two of the probes are loop probes, the other one is a short-circuit probe, and the needle points of the two loop probes are level, connected through molten magnesium, and connected to a casting vacuum pump to form a loop; and the needle point of the short-circuit probe is higher than the two loop probes, and connected with a liquid transfer vacuum pump through a relay. According to the molten magnesium casting heat-insulation furnace disclosed by the invention, physical impurity removal is carried out by virtue of the characteristics that many impurities exist in the upper part and the lower part of a liquid, and few impurities exist in the middle part of the liquid in the molten magnesium heat-insulation furnace, and time of starting up a vacuum pump and supplementing molten magnesium into the heat-insulation furnace from a refining furnace and a supplementing amount of the molten magnesium are judged in combination with the liquid-level balance controller, so that automatic casting is realized, the manual operation intensity is lowered, and the product quality is improved.

Description

technical field [0001] The invention relates to the field of magnesium alloy production, in particular to a casting and holding furnace for magnesium liquid casting. Background technique [0002] Metal magnesium is a new type of lightweight corrosion-resistant metal material developed in the 20th century. It has excellent properties such as low specific gravity, high strength per unit weight, and high chemical stability. It is widely used in automobile manufacturing, light industry, metallurgical industry, chemical industry, electronics, etc. Industrial and instrument manufacturing, etc. [0003] In the current manufacturing process of magnesium ingots, rough magnesium made from dolomite is processed through multiple processes, and finished magnesium ingots are obtained through flux refining, ingot casting, and surface treatment. The molten magnesium in the refining furnace also contains various impurities. If it is directly used to cast magnesium ingots, the reject rate wi...

AI Technical Summary

Problems solved by technology

However, when to start the vacuum pump, when to transfer the molten magnesium from the refining furnace to the holding furnace, and how much to add are all manually judged and operated at present. It is inevitable that due to human errors, the magnesium liquid is not added in time and the scrap rate is high.

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