Device and method for performing semicontinuous casting on hollow ingot

Abstract

The invention discloses a device and a method for performing semicontinuous casting on a hollow ingot. The device comprises a metal liquid tank, a crystallizer which is positioned below the metal liquid tank, and a flow distribution casting pipe which is positioned between the metal liquid tank and the crystallizer, wherein the crystallizer comprises an outer crystallizer and an inner crystallizer; the inner crystallizer is made of a high-hardness heat-resisting material; an annular cavity is formed between the outer crystallizer and the inner crystallizer; the outer crystallizer and the inner crystallizer are provided with an inner cavity liquid circulating cooling structure respectively; a liquid inlet of the flow distribution casting pipe is connected with the metal liquid tank; and a liquid outlet of the flow distribution casting pipe corresponds to the annular cavity of the crystallizer. By the method, the cooling effect of the hollow ingot is improved, crystalline structures are stably uniform, the size stability of the hollow ingot is guaranteed, the casting quality of the hollow ingot is greatly improved, and a good condition is created for production cost reduction of subsequent reprocessing.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a semi-continuous casting device and a casting method for hollow ingots. Background technique [0002] At present, with the rapid development of modern industry, the demand for metal products in various fields is increasing day by day, especially the demand for metal hollow forgings in the chemical industry and energy fields has doubled. There is a huge demand for hollow ingots in the industry. [0003] In the prior art, a graphite rod is usually used as an inner mold for casting a hollow ingot. Since the graphite rod does not have a cooling function, the cooling effect of the inner surface of the hollow ingot is poor; The core force increases with the size of the ingot, and the graphite rod is easily broken when casting a large hollow ingot, which leads to the input of consumables and the increase of the cost. SUMMARY OF THE INVENTION [0004] The purpose of the present inve...

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Problems solved by technology

[0003] In the prior art, graphite rods are usually used as the inner crystallizer for casting hollow ingots. Since the graphite rods do not have cooling function, the cooling effect on the inner surface of the hollow ingot is poor; The heart force increases with the size of the ingot, and it is easy to cause the graphite rod to break when casting a large hollow ingot, which leads to the investment of consumables and the increase in cost

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