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Method and device for slab continuous casting using two pouring openings

A slab continuous casting and nozzle technology, which is used in casting equipment, casting melt containers, manufacturing tools, etc., can solve problems such as uneven temperature, and achieve the effects of improving fluctuation conditions, increasing continuous casting time, and reducing steel throughput.

Inactive Publication Date: 2003-10-15
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method and device to solve the temperature inhomogeneity that exists when a single nozzle casts an extra-wide slab or a slab with a large aspect ratio; and realizes the safe replacement of the stopper during the pouring process, and the It is convenient to replace the submerged nozzle without closing the flow or opening the pouring, thereby increasing the continuous pouring time of the tundish; at the same time, improving the temperature uniformity and liquid level fluctuation in the mold to a certain extent

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  • Method and device for slab continuous casting using two pouring openings
  • Method and device for slab continuous casting using two pouring openings
  • Method and device for slab continuous casting using two pouring openings

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Embodiment Construction

[0032] Such as figure 1 As shown, the method of the present invention is: insert two submerged nozzles 7, 8 into a slab continuous casting crystallizer 1 for pouring, each submerged nozzle 7, 8 is connected with an upper nozzle in the tundish 2 respectively 5 and 6 are connected, forming two independent injection channels between the tundish 2 and the crystallizer 1; above each upper nozzle 5 and 6, a stopper rod 3 and 4 are used to control the injection flow and In this way, the liquid level control of the crystallizer is realized.

[0033] The device of the present invention comprises a tundish 2, submerged nozzles 7, 8 and a crystallizer 1; two upper nozzles 5, 6 and corresponding stopper rods 3, 4 are arranged in the tundish 2; two Two submerged nozzles 7, 8, the submerged nozzles 7, 8 are connected with the upper nozzles 5, 6 in the tundish 2, and the submerged nozzles 7, 8 are inserted in the crystallizer 1; An intermediate weir 9 is set between the nozzles 5 and 6 . ...

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Abstract

The present invention is continuous plate blank casting method and apparatus with two sprues used. Into one continuous plate blank casting crystallizer, there are two immersed sprues inserted and each of the immersed sprues is connected to an upper sprue inside the pouring basket, so that two independent inpouring passages are formed between the pouring basket and the crystallizer. Over each ofthe upper sprues, there is one stopper for controlling flow rate of inpouring and controlling liquid level in the crystallizer. Using the present invention makes it possible to replace stopper inside the pouring basket while controlling liquid level and to shut down and replace one of the sprues while maintaining the inpouring, and this can prolong the continuous casting period greatly and improve the molten steel flow field distribution and temperature distribution inside the crystallizer. The present invention is especially suitable for continuous casting of very wide and thin plate blanks.

Description

technical field [0001] The invention relates to continuous steel casting technology, in particular to slab continuous casting technology. Background technique [0002] In the prior art, the slab continuous casting adopts a single nozzle for casting, that is, only one submerged nozzle is inserted into the crystallizer. In order to make the molten steel flow field and temperature field in the mold more reasonable, the submerged nozzle usually has a side hole to guide the molten steel to the width direction of the side mold. As the width of the slab increases, the temperature difference between the molten steel at the edge and the central area will also increase, which will lead to an increase in the tendency of quality problems at the edge of the slab, and the possibility of bonded breakouts during the pouring process will also increase. Large, so the use of a single nozzle is not suitable for casting extra wide slabs such as slabs with a width of more than 2000mm. This point...

Claims

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Application Information

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IPC IPC(8): B22D11/103B22D41/16
Inventor 刘晓陈超徐荣军崔健李永全
Owner BAOSHAN IRON & STEEL CO LTD
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