Multiple ingot vacuum running castings device and method for vacuum running castings using same

Abstract

The invention relates to a multi-ingot vacuum casting device and a method for implementing vacuum casting by using the device. The multi-ingot vacuum casting device comprises a pedestal, steel ingot molds, a vacuum tank, a vacuum cover, a vacuum cover vehicle, a tundish, a slide gate nozzle mechanism, a guide sleeve, a separation pipe, a lifting mechanism, a viewing window, a pump-out pipe, a vacuum pump system, a main vacuum valve, and a vacuum break valve, wherein the pedestal is arranged in the vacuum tank; the steel ingot molds are arranged on the pedestal; a vacuum cover is connected with a lifting mechanism arranged on the vacuum cover vehicle; the slide gate nozzle mechanism is arranged on the tundish; the guide sleeve and the viewing window are arranged on the vacuum cover; the slide gate nozzle mechanism, the guide sleeve and the steel ingot molds are communicated with each other; the main vacuum valve and the vacuum valve are arranged on the pump-out pipe; and the pump-out pipe is connected with the vacuum tank and the vacuum pump. The inventive technical proposal also includes the method for implementing vacuum casting by using the device. The multi-ingot vacuum casting device has the advantages that (1) the device has simple structure; (2) the molten steel casting process is carried out under high-vacuum condition to improve the quality of molten steel and eliminate the problem of unstable quality of small ingots formed by air casting; and (3) a plurality of ingots can be formed by one step, thus improving the production efficiency.

Description

Technical field:

[0001] The invention discloses a multi-ingot vacuum pouring device and a vacuum pouring method using the device, which are mainly used for molten steel pouring in the foundry industry, especially vacuum pouring. Background technique:

[0002] The pouring of molten steel in the foundry industry mainly adopts two methods: atmospheric pouring and vacuum pouring. At present, most of the molten steel pouring in the foundry industry in my country is pouring in the atmosphere. In my country's heavy machinery industry, large steel ingots are poured in a vacuum state. However, it is limited to the vacuum pouring of a single large steel ingot. Almost all steel ingots less than 20t are poured in the atmosphere, and pouring in the atmosphere is likely to cause secondary oxidation of the molten steel and generate a large number of inclusions. Absorb N from the air 2 、H 2 , O 2 Such gases increase the content of [H], [N] and [O] in molten steel, reduce the quality of mol...

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