CN2171434Y

CN2171434Y - Compound soaking water gap

Info

Publication number: CN2171434Y
Application number: CN 93217646
Authority: CN
Inventors: 姬秀琴; 张慧; 干勇; 张柏汀
Original assignee: Central Iron and Steel Research Institute
Current assignee: Central Iron and Steel Research Institute
Priority date: 1993-07-08
Filing date: 1993-07-08
Publication date: 1994-07-13
Anticipated expiration: 2003-07-08

Abstract

The utility model provides a compound soaking water gap used for sheet bar continuous casting, which uses a composite structure, being assembled by an independent upper and an independent lower bleeders. The upper part of the lower bleeder is connected with the lower part of the upper bleeder. The upper bleeder and a ladle are assembled into a whole, and the upper and the lower bleeders are connected by a metal ring with a long rod. Two molten steel outlets are positioned at two narrow side wall positions of the lower part of the lower bleeder. The upper bleeder is made from ordinary clay. The lower bleeder is made from fused silica, and aluminum carbon and zirconium materials. The lower bleeder which is easy to erode can be changed under the condition of discontinuous casting. The upper bleeder has the same service life with a ladle. The cost can be reduced.

Description

Compound soaking water gap

The utility model belongs to the metal continuous cast servicing unit.Mainly be applicable to sheet blank continuous casting.

Sheet blank continuous casting is compared with common continuous casting, and is bigger in the technical difficulty of continuous casting process.Because sheet billet thickness is little, the crystallizer cross section is narrower, and the mouth of a river and crystallizer wall spacing are very little, and molten steel is more serious to washing away of casting blank solidification.Near washing away the district, easily form the weak link of solidifying.For this reason, sheet blank continuous casting must propose the mouth of a river that the very rational molten steel of a kind of structure imports crystallizer.

The sheet blank continuous casting that comprises the prior art of Chinese patent CN87104752A, CN91227348.8, CN92223447.7 etc. is whole shape structure with the immersion mouth of a river, and its top is embedded in the tundish, and promptly tundish fuses with the immersion mouth of a river.In the time of need changing the mouth of a river, must stop casting, connect tundish and hang out replacing together.And in fact, the service life of tundish is more much longer than immersing the mouth of a river, and it is forced to change, and gate structure is unreasonable to be caused because of immersing.This not only wastes, and influences production efficiency.In addition, it is longer that existing whole shape is immersed mouth of a river length, and because wall is thin, not only make difficulty, and in transportation easy fracture.Moreover, because immersing crystallizer, the mouth of a river is subjected to molten steel scouring, etch, so materials such as vitreous silica, aluminium carbonaceous, zirconium matter are all adopted at the mouth of a river, cost an arm and a leg.

The purpose of this utility model is that the combined type that provides a kind of suitable sheet blank continuous casting to use immerses the mouth of a river.

It is fabricated structure that combined type described in the utility model immerses the mouth of a river, by upper and lower two independently the bleeder combine; Last bleeder and intermediate package are made into one, and top, following bleeder then joins with bottom, last bleeder.The inside and outside surface configuration of last bleeder is the circular cone bench-type; To oblate transition, the upper end is circular to the inside and outside surface configuration of following bleeder by circle, and the lower end is oblate.The end surface shape of both sides, lower end molten steel delivery port has two kinds: the one, by up-small and down-big two semicircles and figure that trapezoid is formed; The 2nd, by two equal semicircles and the oblate figure that rectangle is formed.It is an ear shape that the molten steel delivery port of both sides, lower end, following bleeder extends upward at an angle, and angle of inclination (horizontal line angle) is 5 °≤α≤20 °, and the sectional area of its each molten steel delivery port is 0.5～1.0 with the ratio of centre bore sectional area.

Last bleeder adopts unselected clay to make low price; Following bleeder is immersed in the crystallizer, is subjected to the molten steel scouring etch, very easily damages, so adopt vitreous silica or aluminium carbonaceous or zirconium material to make.

Following bleeder adopts the becket of belt length bar to be fixed on the tundish housing, makes it to join with last bleeder.Becket is opened, and separate then upper and lower bleeder.Change bleeder down, easy to use.

Last bleeder and tundish are connected as a single entity, and both unanimities in service life are promptly changed simultaneously; Following bleeder is owing to be subjected to the molten steel scouring etch, and fragile, so need often to change, the service life of bleeder look many than down the service life of last bleeder.Owing to adopt fabricated structure, instantly the bleeder life-span expires or fracture takes place and waits other abnormal conditions, when needing to change down the bleeder, need not to stop cast, need not to change tundish and go up the bleeder, only need to descend the bleeder to carry out online replacing and can proceed casting.

Compared with prior art, the utlity model has following advantage:

(1) can not interrupt casting and change bleeder down, and not influence the use of tundish and last bleeder, and can in the extremely short time, finish replacing, not influence direct casting, improve production efficiency.

(2) owing to adopt fabricated structure, adopt different materials to make upper and lower bleeder, give full play to effect of material separately and service life separately, saved the time at the material and the integral replacing mouth of a river greatly, reduced cost.

(3) the split manufacturing is simple, and is convenient to packing, transportation.

Description of drawings

Accompanying drawing 1 immerses the structural representation at the mouth of a river for the utility model combined type.

Accompanying drawing 2 is a last bleeder schematic diagram.

Accompanying drawing 3 is following bleeder schematic diagram.

Accompanying drawing 4 is following bleeder A-A generalized section.

Accompanying drawing 5 is following bleeder B-B generalized section.

Accompanying drawing 6,7 is the outer face figure of the two kinds of different molten steel delivery ports in bleeder down (A in the accompanying drawing 3 to).

In above-mentioned accompanying drawing 1～7,1 is last bleeder, 2 are following bleeder, and 3 is pocket block, and wedge is in the tundish bottom, 4 is tundish end liner refractory material, 5 is the tundish housing, and 6 is the becket of belt length bar, and it will descend the bleeder to be fixed on the tundish housing, 7 upper ends for following bleeder are conical; The 8 middle upper ends for following bleeder, its exterior contour and interior hole shape to oblate transition, help all even current stabilization of steel stream by circle; The 9 middle lower ends for following bleeder, its cross section are oblate, promptly are made up of two semicircles and a rectangle, as shown in Figure 5; 10 is the ear shape; 11 is the molten steel delivery port, is in the lower end of bleeder two narrow sidewalls down; α is molten steel delivery port center line and horizontal line angle, and its value is 5 °≤α≤20 °.

Claims

1, the combined type used of a kind of sheet blank continuous casting immerses the mouth of a river, and two molten steel delivery ports are in lower end, the mouth of a river two narrow side-walls, it is characterized in that:

A, this mouth of a river are fabricated structure;

B, by upper and lower two independently bleeder (1) and (2) combine;

The top of C, following bleeder (2) and the bottom of last bleeder (1) join;

D, last bleeder (1) are made into one with intermediate package;

E, following bleeder (2) adopt the becket (6) of belt length bar to be fixed on the tundish housing (5), make it to join with last bleeder (1).

2, the immersion according to claim 1 mouth of a river is characterized in that the inside and outside surface configuration of bleeder (1) is the circular cone mould assembly.

3, the immersion according to claim 1 mouth of a river is characterized in that molten steel delivery port center line and horizontal angle α are: 5 °≤α≤20 °.

4, the immersion according to claim 1 mouth of a river, the sectional area that it is characterized in that each molten steel delivery port is 0.5～1.0 with the ratio of the sectional area of centre bore.

5, the immersion according to claim 1 mouth of a river is characterized in that bleeder (1) adopts unselected clay to make, and following bleeder (2) all can adopt vitreous silica, aluminium carbonaceous, zirconium material to make.