CN2142764Y

CN2142764Y - Crystallizer for continuous casting square billet horizontally

Info

Publication number: CN2142764Y
Application number: CN 92244001
Authority: CN
Inventors: 章仲禹
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-12-05
Filing date: 1992-12-05
Publication date: 1993-09-29
Anticipated expiration: 2002-12-05

Abstract

The utility model provides an improved crystallizer for continuous casting square billet horizontally. The structure of the crystallizer is characterized in that the crystallizer adopts the hole of circular separating ring and watercooling crystalline sleeve as the quartered secant round hole. The utility model overcomes the defects of easy cracking of the separating ring, high processing accuracy, uneasy to ensure the mating surface lies in the existing crystallizer composed of square separating ring and square crystalline, and prolongs the service life of the crystallizer efficiently and cuts down the manufacture cost. The utility model is suitable for horizontal continuous casting small square billets of 70 square, 50 square, etc.

Description

Crystallizer for continuous casting square billet horizontally

The utility model belongs to a kind of crystallizer of improved horizontal casting square billet.

Horizontal continuous casting technology is the eighties new developing technology, it is characterized in that allowing molten steel directly flows into a level through the delivery port of side from stove crystallizer by its condensation, and continuously pull out the purpose that the steel billet that has solidified is realized continuous casting by a cover throwing equipment.In prior art, in the contact position of water-cooled crystallization cover front end and delivery port a high temperature resistant and little eseparation ring of deflection is set all,, and plays sealing ring with of the thermal shock of minimizing molten steel to crystallizer, prevent that molten steel from infiltrating fit clearance and forming overlap, increase resistance of billet withdrawal.The horizontal casting square billet is normal to adopt square eseparation ring to cooperate with square water-cooled crystallization cover, and its purpose is to make when flowing through the steel flow entry cold crystallization cover of eseparation ring, and it is mobile apart from about equally, to obtain the essentially identical starting point of solidifying, is convenient to throwing.But, the crystallizer of this spline structure in use can produce following problem: the quality of fit of square eseparation ring of the first and water-cooled crystallization cover requires high, otherwise do not have sealing function, therefore all must there be higher shape and dimensional accuracy in its composition surface, cause difficulty to processing, increase manufacturing cost.It two is that four angles of square eseparation ring are that stress is concentrated part, and eseparation ring resistant to elevated temperatures boron nitride commonly used is made, and very high hardness is arranged, and its corner is easy to generate crackle and lost efficacy under thermal shock, has reduced service life, increases manufacturing cost.

The purpose of this utility model is to overcome the existing problems of prior art, provides a kind of eseparation ring and water-cooled crystallization cover quality of fit to guarantee that easily the crystallizer of the horizontal casting square billet of eseparation ring long service life newly designs.

Task of the present utility model is achieved in that shown in Fig. 1～3, with technology is identical, this crystallization includes an eseparation ring in a water-cooled crystallization cover, its improvements are to adopt circular eseparation ring, and the endoporus of water-cooled crystallization cover changes fourth class secant circular hole into by original square, and the ratio of its secant action S and circle hole radius R is 0.15～0.25, ratio is too small, the molten steel condensation is inhomogeneous, and the strand plane width was too small again when ratio was excessive, the carrying out of rolling work after being not easy to.

Fig. 1 is the longitudinal sectional view of a kind of schematic construction of the utility model.

Fig. 2 is that the A of Fig. 1 is to view.

Fig. 3 is the B-B cutaway view of Fig. 1.

From above-mentioned improvement as can be known, adopt circular the separation after (1) ring, do not produce the place that stress is concentrated basically, can prevent the generation of hot tearing; In addition, circular eseparation ring (1) is easy to process, and quality of fit guarantees easily.And the endoporus of water-cooled crystallization cover (2) adopts after the fourth class secant circular hole, has both guaranteed that strand had certain plane width, makes the molten steel condensation even around again, can guarantee carrying out smoothly of throwing work.Therefore, the utility model is compared with existing horizontal crystallizer and is had that processing and fabricating is convenient, the life-span long, low cost and other advantages.The utility model is specially adapted to little square billets such as horizontal casting side 70, side 50.

Claims

1, a kind of crystallizer of horizontal casting square billet, include eseparation ring (1) and water-cooled crystallization cover (2), it is characterized in that eseparation ring (1) is circular eseparation ring, water-cooled crystallization cover (2) is a fourth class secant circular hole, and the ratio of its secant action S and circle hole radius R is 0.15～0.25.