CN201132207Y

CN201132207Y - Slab crystallizer

Info

Publication number: CN201132207Y
Application number: CNU2007200890297U
Authority: CN
Inventors: 彭胜堂; 程方武; 张先贵; 郑万; 杨运超
Original assignee: Wuhan Iron and Steel Group Corp
Current assignee: Wuhan Iron and Steel Group Corp
Priority date: 2007-12-14
Filing date: 2007-12-14
Publication date: 2008-10-15
Anticipated expiration: 2017-12-14

Abstract

The utility model relates to a plate blank crystallizer, which comprises two broad face copper plates (1) which are mutually opposite and two narrow face copper plates (2) which are mutually opposite. The broad face copper plates (1) and the narrow face copper plates (2) are assembled together to form the plate blank crystallizer with a rectangle cross-section. The face of the inner wall of the narrow face copper plate (2) against the broad face copper plate (1) is a curve face (4) with a transition towards the inner wall of the broad face copper plate (1). Compared with the prior art, four corners of the rectangle cross-section of the inner cavity of the plate blank crystallizer are transition curve faces, thus corner cooling is relatively uniform in the process of condensing and forming solidified shells of molten steel in the plate blank crystallizer, therefore the problems of surface damage owing to uneven cooling and condensing of plate blank angle parts and cracks generated owing to over low temperature of marginal parts are avoided, and the rolling yield of a rolling mill is improved.

Description

A kind of plate slab crystallizer

Technical field

The utility model relates to continuous casting mold, particularly plate slab crystallizer.

Technical background

The plate slab crystallizer that uses in the conticaster casting is generally fitted together and is formed crystallizer by two wide copper coins respect to one another, two narrow copper plates respect to one another at present.Because existing crystallizer cross section is a rectangle, its bight is rectangular, so the slab that conticaster casts out is rectangular bloom, and the bight is the right angle, can have limit portion wire, pipe in various degree or defective such as scab after rolling into steel plate (volume) and the bight is the continuous casting billet at right angle, lumber recovery is low.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of plate slab crystallizer is provided, and the slab of this crystallizer output can improve the lumber recovery of steel rolling.

The utility model solves the problems of the technologies described above the technical scheme that is adopted:

A kind of plate slab crystallizer, it comprises two wide copper coins respect to one another and two narrow copper plates respect to one another, wide copper coin and narrow copper plate fit together the plate slab crystallizer that forms the square-section; The narrow copper plate inwall is a curved surface to the transition of wide copper coin inwall by the face of wide copper coin part.

In the such scheme, described curved surface is the circular arc type curved surface.

In the such scheme, the garden arc radius of described circular arc type curved surface is 4-150mm.

In the such scheme, the contact-making surface of narrow copper plate and wide copper coin and curved surface intersection circular arc chamfering, the circular arc chamfering radius is 2-10mm.

The contrast prior art the utlity model has following advantage:

1, four of plate slab crystallizer inner chamber square-section angles are fillet surface, the bight cooling that molten steel is solidified in plate slab crystallizer in the formation base shell process is even relatively, thereby avoided slab bight cooled and solidified inhomogeneous and blemish occurs, cross the low problem that crack because of limit portion temperature with direct when rolling, improved the lumber recovery of steel rolling mill.

2, the contact-making surface of narrow copper plate and wide copper coin and curved surface intersection circular arc chamfering make that narrow copper plate and wide copper coin assembling are easier, can reduce the destruction of high temperature to the contact-making surface and the curved surface intersection of narrow copper plate and wide copper coin.

The utility model plate slab crystallizer is simple in structure, cost is low.

Description of drawings

Fig. 1 is the utility model example structure schematic diagram

Fig. 2 is the enlarged diagram of narrow copper plate

Specific embodiments

The utility model embodiment as shown in Figure 1, it comprises two wide copper coins 1 respect to one another and two narrow copper plates 2 respect to one another, oil cylinder 3 on two narrow copper plates, the 2 outer walls is pushed down, and wide copper coin 1 and narrow copper plate 2 is pressed fit together the plate slab crystallizer that forms the square-section; Narrow copper plate 2 inwalls are curved surface 4 to wide copper coin 1 inwall transition by the face of wide copper coin 1 part.

Described curved surface 4 is circular arc type curved surfaces, and the garden arc radius of circular arc type curved surface is 4-150mm.

As shown in Figure 2, the contact-making surface 5 and the curved surface 4 intersection circular arc chamferings of narrow copper plate 2 and wide copper coin 1, the circular arc chamfering radius is 2-10mm.

With steel plant that produce 5000000 tons of steel per year is example, rolls that back steel plate (volume) edge fault reduces and the lumber recovery raising, minimizing waste products at least 1%, its year economic benefit as follows:

Year economic benefit=annual production * waste products slip * (steel average unit price-steel scrap unit price)

＝5000000×1％×(4000-2000)

=100000000 yuan=100,000,000 yuan.

Claims

1, a kind of plate slab crystallizer, it comprises two wide copper coins respect to one another (1) and two narrow copper plates respect to one another (2), wide copper coin (1) and narrow copper plate (2) fit together the plate slab crystallizer that forms the square-section; It is characterized in that: narrow copper plate (2) inwall is the curved surface (4) to wide copper coin (1) inwall transition by the face of wide copper coin (1) part.

2, plate slab crystallizer as claimed in claim 1 is characterized in that: described curved surface (4) is the circular arc type curved surface.

3, plate slab crystallizer as claimed in claim 2 is characterized in that: the garden arc radius of described circular arc type curved surface is 4-150mm.

4, plate slab crystallizer as claimed in claim 1 is characterized in that: the contact-making surface (5) and curved surface (4) the intersection circular arc chamfering of narrow copper plate (2) and wide copper coin (1), the circular arc chamfering radius is 2-10mm.