CN201008950Y

CN201008950Y - Wind cap preventing nitrogen increase in molded steel molded steel casting

Info

Publication number: CN201008950Y
Application number: CNU2006200494089U
Authority: CN
Inventors: 王�义; 陈向东; 胡会军; 狄永忠; 李南跃
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2006-12-22
Filing date: 2006-12-22
Publication date: 2008-01-23
Anticipated expiration: 2016-12-22

Abstract

A windshield preventing nitrogen entering moulded cast steel, comprising a cylinder which is a hollow column, the wall of the cylinder is provided with a argon blowing groove; a flange positioned on upper end face of the cylinder and extends inward along the cylinder radially; at the lower end of the cylinder, a couple of lifting ears are symmetrically arranged on two side of the cylinder. The utility model has the advantages that with the windshield, the external natural air is prevented from blowing a great amount of air into and to contact with the liquid steel, thereby the absorption of nitrogen is prevented during the pouring process, which means no nitrogen is added to the liquid steel. The windshield can be used repeated, not only ensuring the increase of the production quality, but also decreasing the production costs.

Description

A kind of hurricane globe that prevents nitrogen pick-up in the moulded steel casting

Technical field

The utility model relates to a kind of anti-nitrogen pick-up hurricane globe, relates in particular to a kind of guard circle hurricane globe that prevents molten steel nitrogen pick-up in the moulded steel casting cycle.

Background technology

The anti-nitrogen pick-up argon envelope resist technology that existing killed steel is adopted in casting process is to install a cylindrical argon envelope brick 5 of making of clay before the killed steel cast on the following mouth of a river 200 of ladle 100 additional, and the Argon aperture is stayed in the centre, as shown in Figure 1.During casting, water Argon pipe that the steel worker will connect and insert and make argon gas circulation in argon envelope brick 5 in the Argon aperture, argon gas forms the air film secluding air, reduces in the air nitrogen molecular by the suction of steel stream, thereby reaches the purpose that prevents nitrogen pick-up in the casting.

It is bigger to contain the alloy amount in the general high-alloy steel invar, molten steel in the early stage in the processing procedure because molten steel stirs relatively more severely, when stirring, be easier to cause nitrogen pick-up because of ingress of air compares.Some element of high-alloy steel such as Ti, Cr, B and nitrogen-containing alloy have affinity interaction to nitrogen, easily cause nitrogen pick-up in the casting cycle as the method that does not have good secluding air in casting.Adopt argon envelope brick to prevent nitrogen pick-up at present, be open type, molten steel has 250mm～300mm left side approximately from the distance of argon envelope brick, can not effectively completely cut off extraneous wind-force, thereby make the wind argon gas film that looses, directly blow to steel stream, make directly a large amount of ingress of air and produce and inhale nitrogen in the cast of molten steel, cause nitrogen to exceed standard.

Above-mentioned situation makes the present anti-nitrogen pick-up protection casting method that adopts no longer adapt to the needs of producing, and therefore must improve present method of operating.

Summary of the invention

The purpose of this utility model is to provide a kind of hurricane globe that prevents nitrogen pick-up in the moulded steel casting, enables to play preventing that air is blown into, thereby prevents nitrogen pick-up.

For reaching above-mentioned purpose, the utility model provides a kind of hurricane globe that prevents nitrogen pick-up in the moulded steel casting, comprising: a cylindrical shell, and it is a hollow circular cylinder, offers an Argon groove on this barrel wall; One flange is positioned at the upper surface of described cylindrical shell, and is extended radially inwardly by cylindrical shell; In described barrel wall lower end; A pair of lifting ear is symmetricly set in the both sides of described cylindrical shell.

Preferably, described flange and described cylindrical shell design for integral type.Described Argon groove is the cavate breach that makes progress of the lower end by described cylindrical shell.

Preferably, described cylinder material is a sheet iron.Described barrel diameter is 440mm, and height is 330mm

Compared with prior art, advantage of the present utility model is: can cut off extraneous natural wind by this hurricane globe and directly blow in the molten steel, directly contact molten steel and effectively avoid inhaling in the casting cycle nitrogen thereby block a large amount of air, effectively prevent molten steel nitrogen pick-up.This hurricane globe can be recycled, and promptly plays the raising that guarantees product quality and can reduce production costs again.

Description of drawings

Fig. 1 is the working state schematic representation when not using hurricane globe in the prior art.

Fig. 2 is the structural representation of the hurricane globe of the utility model specific embodiment.

Fig. 3 is the working state schematic representation before hurricane globe of the present utility model promotes.

Fig. 4 is the working state schematic representation after hurricane globe of the present utility model promotes.

Fig. 5 seals the structural representation that brick cooperates for the hurricane globe of the utility model after promoting with argon.

The specific embodiment

As Fig. 2, hurricane globe 10 of the present utility model, because considering the operative employee is enclosed within it outside argon envelope brick before casting, so consider with low weight material, the material that present embodiment uses is the thick book iron sheet of 0.7mm, made cylinder tubular hurricane globe 10, comprise a cylindrical shell 3, its diameter is 440mm, high 330mm, one antiseized flange 1 has been installed in hurricane globe 10 upper surfaces, antiseized flange 1 has a flanging, directly is enclosed within the top of cylindrical shell during installation with flanging, is provided with a fixed strip at the top end of cylindrical shell, antiseized flange is fixed, the outside dimension of its outside dimension and hurricane globe 10 adapts, and in the present embodiment, the width dimensions of flange 1 is 35mm, the purpose that this antiseized flange is set is to prevent that the molten steel in the ladle is dropped in the slit between hurricane globe 10 and the argon envelope brick (not shown), thereby makes hurricane globe and argon seal the elevating movement that the brick adhesion has hindered hurricane globe 10.Molten steel is dropped on this antiseized flange 1 can effectively avoid above-mentioned situation.In the middle of described tubular hurricane globe 10 bottoms, upwards offer the Argon groove 4 of a high 150mm, loose 30mm, rise and highly be used for settling the Argon pipe mouth of pipe 42, see shown in Figure 4.Two upper lateral parts at cylindrical shell 3 respectively are equipped with a lifting ear 2, and this hurricane globe also need be equipped with a hoisting frame (figure does not show) in addition, and this hoisting frame is connected with lifting ear 2, can make the hurricane globe lifting, and hoisting frame is the instrument that generally uses in the metallurgy industry.

As Fig. 3, open water before, operative employee's hand-guided hoisting frame, because of hoisting frame with promote ear and be connected, therefore hurricane globe 10 can be enclosed within outside the argon envelope brick 5, when open water after, the operative employee utilizes hoisting frame with hurricane globe 10 rises.

In conjunction with Fig. 4 and Fig. 5, hurricane globe 10 is positioned at and is enclosed within outside the argon envelope brick, and Argon pipe (not shown) inserts the argon blowing hole 42 in the Argon groove 41, carries out the windproof protection of Argon.When ladle 100 moves to the cast of feed trumpet 6 centerings, because the following mouth of a river 200 of steel stream is completely enclosed within the hurricane globe 10, completely cut off extraneous natural wind, cause nitrogen pick-up in the cast thereby avoid steel to flow direct ingress of air.

Because hurricane globe of the present utility model can rise and descend, so do not influence normal operations such as thermometric in the cast and sampling.

Claims

1. a hurricane globe that prevents nitrogen pick-up in the moulded steel casting is characterized in that, comprising:

One cylindrical shell, it is a hollow circular cylinder, offers an Argon groove on this barrel wall;

One flange is positioned at the upper surface of described cylindrical shell, and is extended radially inwardly by cylindrical shell;

In described barrel wall lower end;

A pair of lifting ear is symmetricly set in the both sides of described cylindrical shell.

2. the hurricane globe that prevents nitrogen pick-up in the moulded steel casting as claimed in claim 1, it is characterized in that: described flange and described cylindrical shell design for integral type.

3. the hurricane globe that prevents nitrogen pick-up in the moulded steel casting as claimed in claim 1 or 2 is characterized in that: described Argon groove is the cavate breach that makes progress of the lower end by described cylindrical shell.

4. the hurricane globe that prevents nitrogen pick-up in the moulded steel casting as claimed in claim 1 or 2, it is characterized in that: described cylinder material is a sheet iron.

5. the hurricane globe that prevents nitrogen pick-up in the moulded steel casting as claimed in claim 1 or 2, it is characterized in that: described barrel diameter is 440mm, height is 330mm.

6. the hurricane globe that prevents nitrogen pick-up in the moulded steel casting as claimed in claim 3, it is characterized in that: described barrel diameter is 440mm, height is 330mm.