Copper plate of crystallizer of high-efficiency continuous casting machine

Abstract

The invention discloses a copper plate of a crystallizer of a high-efficiency continuous casting machine. The copper plate comprises a copper plate body and a plurality of transverse cooling channelslongitudinally formed in the copper plate body at intervals; each transverse cooling channel comprises a transverse cold water hole transversely drilled in the copper plate body, a middle water hole formed in the middle of a cold surface, side water holes formed in the cold surface and located on two sides of the middle water hole as well as screw plugs fixed to the end openings of the transversecold water hole in a sealed manner, and the middle water hole and the side water holes communicate with the transverse cold water hole. According to the copper plate, the transverse cooling mode is adopted, uniform cooling is realized with the mode, with increase of the water inlet and outlet holes, the flow of cooling water can be substantially increased, the cooling effect can be improved, and essential conditions for the high casting speed can be realized.

Description

technical field [0001] The invention belongs to the technical field of continuous casting machines for steelmaking, in particular to a high-efficiency continuous casting machine crystallizer copper plate. Background technique [0002] The mold is the heart of the continuous casting machine. Its structural design will directly affect the casting speed and quality of the slab. It is the key technology in the modern steelmaking and continuous casting production. [0003] The mold can be divided into five categories according to the shape of the billet produced: square billet mold, rectangular billet mold, round billet mold, slab mold and special-shaped billet mold. According to the cooling method, it can be divided into: water jacket and copper Tube assembly type (mainly used for tube molds of square billets, round billets and rectangular billets), spray type (mainly used for tube molds), copper plate or copper tube cold surface open water tank type, copper plate or copper tube...

AI Technical Summary

Problems solved by technology

If the taper becomes smaller or negative, the air gap between the billet and the copper wall will increase, which will reduce the heat conduction efficiency and cause steel leakage accidents; It is easy to cause the cooling water on the cold surface to boil intermittently, which affects the cooling effect and cannot reach the effective billet shell thickness of the billet out of the mold, which will lead to steel breakout accidents; ③The structure limits the uniformity of cooling, because the corners are two-dimensional heat conduction, easy Lead to excessive cooling of the corners, resulting in defects such as corner cracks

[0006] 2. The defects of the spray mold are as follows: ①This structure cancels the water jacket and water seam structure, and uses spray cooling, which also cannot get strong support, and is easily deformed by thermal stress and molten steel static pressure, and the taper of the inner cavity is easy to change

If the taper becomes smaller or negative, the air gap between the billet and the copper wall will increase, which will reduce the heat conduction efficiency and cause a steel breakout accident; ②Although the structure is uniformly cooled, the cooling efficiency is low, and the cooling effect required by the high casting speed cannot be achieved;

[0007] 3. The defects of copper plate or copper tube cold surface grooved crystallizer are as follows: ① The copper tube cold surface is slotted to increase the cooling area and improve the cooling effect, but it reduces the deformation resistance of the copper tube and can only be used once. It cannot be repaired and used many times, which increases the production cost

②Due to the longitudinal groove along the copper pipe, the cross-sectional area of ​​the water inlet and outlet is limited, and the cooling water flow rate cannot be greatly increased again, and the billet casting speed cannot achieve the ideal high casting speed effect

③It is very difficult to make grooves on the cold surface of the copper plate, especially for arc-shaped copper plates, and the machining accuracy of the cooling groove is difficult to guarantee; Uniformity of cooling cannot be guaranteed

[0008] 4. Defects of copper tube or copper plate longitudinal drilling type crystallizer: ① Copper tubes are generally arc-shaped copper tubes, which must be drilled and then extruded during production. The drilling depth is large, the production cost is high, and the drilling accuracy is high. It is difficult to guarantee; ②Due to the limitation of the cooling hole layout, it can only be used once, and cannot be repaired and used many times, resulting in waste of resources and increased production costs; ③The longitudinal drilling of copper plates is mainly used on straight-faced copper plates, and the cost is relatively high

Longitudinal drilling of curved copper plates is almost impossible, or the production process is relatively complicated, and the production cost is very high

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