RU12804U1 - MULTI-FUNCTIONAL CONTINUOUS CASTING MACHINE - Google Patents

Description

Object - Utility Model

Multi-strand continuous casting machine

The utility model relates to the field of metallurgy and is intended for continuous casting of slabs, blooms and high-grade steel ingots in one mold.

A known design of a combined installation of continuous casting of steel, containing an intermediate ladle and casting device for casting ordinary, narrow slabs and 3 blooms. Crystallizers are provided for both wide and narrow slabs, as well as three streams for blooms. For casting two narrow slabs, a partition is provided in the mold; a special mold design is chosen for three blooms (see K. Schwach, X. Festl, O. Krigner, I. Shpis. Combined slab UPRS // Proceedings of the Third Congress steelmaking; Ikov, Moscow, 1996).

A disadvantage of the known design of UPRS is the impossibility of obtaining both slabs and blooms in one mold at the same time, as well as the need to contain a double park of molds.

Combined MPLZ for casting one wide slab or several narrow billets in one stream is becoming more widespread. To do this, you can use a crystallizer that has a partition. The middle end walls forming the septum with water-cooled copper plates are installed in the cylindrical grooves of the interchangeable bracket, which in turn is reinforced in the base of the mold bottom plate. The upper part of the middle end walls of the hold MPK V22V11 / 04

screw with eyelets. If necessary, the middle end walls rotate relative to the stops mounted on the wide walls. The use of a removable bracket with a variable size between cylindrical grooves allows you to save the axis of the streams when installing a unified middle end wall (see V. M. Niskovsky, S. E. Karlinsky, A. D. Berenov. Continuous casting machines for slab billets. M., Metallurgy , 1991, p. 64).

A disadvantage of the known design is the impossibility of obtaining in the same mold at the same time both slabs and blooms.

A known design of a continuous casting machine for the production of blooms, containing an intermediate bucket and two molds. When casting blooms and slabs, different intermediate ladles are used. The length of the intermediate ladles for casting blooms is longer than for casting slabs, due to the large distance between the external stoppers. The mold design is narrower and longer. The levers for opening the stoppers of the intermediate ladles are mounted on the bucket with the help of the intermediate traverse. The stopper filling system is equipped with slide gates. Crystallizers with adjustable walls are used for casting slabs. When casting blooms, separate crystallizers are used for each thread. They are mounted on a lifting table with a pomp; on an intermediate frame. In order to be able to pour narrower blooms, molds with adjustable walls are used (see L. Fige, V. Resh, V.-D. Repke, G. Schneider. High-performance continuous casting machine of Krupp firm shtal for the production of blooms and slabs. // Ferrous metals , 1986, No. 14, pp. 24-29).

A disadvantage of the known design is the need to contain a double fleet of intermediate ladles and molds, as well as the inability to obtain both slab and bloom in one mold.

Closest to the proposed design in technical essence is a combined bloom-slab continuous casting machine for casting individual continuously cast billets, as well as blooms and slabs. The machine is an intermediate bucket and disintegrated mold. The mold can be either single or double, that is, it has; it has an internal motionless narrow face (see X. Nasiva, K. Odzaki, K. Yeshida, X. Tomono. Combined Blum-Slab CCM.// Ferrous metals, 1985 , No. 14, p. 31-34).

A disadvantage of the known constructive solution is the deterioration of the surface quality and macrostructure of a continuously cast billet in the case of asymmetric casting. Due to the fixed position of the immersion nozzle, the distance between it and the internal partition in the form of a narrow face, the position of which is also fixed, is always the same. If the distance on the other side of the mold between the immersion nozzle and the movable narrow face varies depending on the width of the slab, then the axis of the immersion nozzle does not coincide with the axis of the mold cavity, which forms; it has a slab of a different width. This leads to increased accident rate when casting workpieces.

The task to which the claimed utility model is directed is to ensure the stability of the casting process, including asymmetric, upon receipt of the workpieces of the proper quality and the required macrostructure when adjusting the width of the mold during the casting process.

The essence of the proposed utility model is that in the well-known multi-strand continuous casting machine containing an intermediate bucket with stoppers and immersion cups in its bottom and molds with removable partitions located below it, the aforementioned intermediate bucket is equipped with removable inserts installed in the bottom with the inserts placed in them immersion nozzles, the axes of which are aligned with the axes of the working cavities of the molds forming the workpiece. In addition, the bucket is equipped with a mechanism for moving the stoppers to align their axes with the axes of the immersion nozzles.

The implementation of a multi-strand continuous casting machine of the proposed design ensures the fixation of the axes of the stopper-glass-mold cavity during any casting of the mold along the width during casting due to replaceable inserts in the ladle, which leads to an increase in machine productivity when producing workpieces of good quality and there is no accident for account of breakthroughs of metal under the mold.

The essence of the utility model is illustrated by drawings, where in FIG. 1 shows a diagram of a machine for simultaneous casting in one caster of continuous casting machines of slabs of different widths, and in the other - one slab and one bloom or high-quality billet; in FIG. 2 is a diagram of a machine for simultaneous casting in one stream of one slab and high-quality billets, and in the second - one slab and one bloom; in FIG. 3 is a diagram of a machine for simultaneous casting of a wide slab in one stream and in the other several bloom or high-quality billets.

Multi-strand continuous casting machine contains an intermediate bucket 1 (Fig. 1-3) with sides 2 and immersion cups 3, placed in removable inserts 4 installed in the bottom. The axles 5 of the immersion nozzles 3 are aligned with the axes 6 of the working cavities 7 of the molds 8, which is located under the intermediate bucket 1. The intermediate ladle 1 is equipped with a movement mechanism (not shown in the figures) of the stoppers 2 to align their axes 9 with the axes 5 of the immersion nozzles 3. When the rearrangement of the molds 8 in width during the casting process by installing interchangeable partitions 10 is replaced

interchangeable insert 4 in the intermediate ladle 1 to another, where the axis 5 of the immersion nozzles 3 are aligned with the axes 6 of the working cavities 7 of the molds rearranged in width 8 to obtain a given size assortment of workpieces. The mechanism of mixing; the stoppers 2 their axes 9 are aligned with the axes 5 of the immersion nozzles 3, which are already placed under the specified size assortment in the new insert 4, and their axes 5 are automatically aligned with the axes 6 of the working cavities 7 of the mold 8.

The proposed design of a multi-strand continuous casting machine works as follows.

When the stoppers 2 (Fig. 1-3) are opened, the molten metal through the submersible glasses 3 of the tundish installed in the replaceable insert 4 corresponding to the given size assortment of the cast billets is fed to the molds 8, also rebuilt in width under the given assortment of the cast billets using interchangeable partitions 10,

The use of multi-caster CCM of the proposed design will increase the productivity of the machine due to a more rational use of the working cavities of wide crystallizers and obtain workpieces of the proper quality by fixing the axes of the stopper - cup - working cavity of the mold.

Claims (1)

A multi-strand continuous casting machine containing an intermediate bucket with stoppers and immersion cups in its bottom and molds located underneath with replaceable partitions, characterized in that the intermediate bucket is equipped with replaceable inserts installed in its bottom, in which immersion nozzles are placed, the axes of which are aligned with the axes of the working cavities of the molds forming the workpieces, in addition, the bucket is equipped with a mechanism for moving the stoppers to align their axes with the axes of the immersion nozzles.