CN201008972Y

CN201008972Y - Continuous casting immersed water gap containing conductive ferrule

Info

Publication number: CN201008972Y
Application number: CNU2007200682383U
Authority: CN
Inventors: 沈建国; 任玉森
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2007-03-27
Filing date: 2007-03-27
Publication date: 2008-01-23
Anticipated expiration: 2017-03-27

Abstract

The utility model relates to a linkage casting soak type runner stripper, in particular to a linkage casting soak type water opening with electrode. The linkage casting soak type runner stripper with a conductive ferrule comprises a runner stripper body and an electrode and is characterized in that the electrode is the conductive ferrule, the conductive ferrule is arranged inside a concave slot outside the runner stripper body and the runner stripper body is made of conductive corhart. An oxidization resistant conductive dope is coated between the conductive ferrule and the runner stripper body. The conductive dope is made up of metal of fiber or particle shape, alloy or other conductive matters. The utility model is of simple structure, reliable connection between the electrode conductive ferrule and the runner stripper body, good conduction performance, thereby executing electric field between the runner stripper and the molten iron easily and effectively refraining the blockage and erosion of the runner stripper.

Description

Contain and conduct electricity the continuous casting submersed nozzle of lasso

Technical field

The utility model relates to the continuous casting submersed nozzle, relates in particular to the continuous casting submersed nozzle that contains electrode.

Background technology

The continuous casting submersed nozzle generally all has good anti-slag and invades performance and thermal shock resistance.But, at some special steel grades of cast, particularly when cast deep deoxidation steel alloy, because oxide inclusions and usually stops up the mouth of a river in the separating out and depositing of mouth of a river inwall in the steel.Nozzle blocking can cause that pulling rate slows down or flow velocity is irregular, causes the continuous casting fluctuation of service; Also can cause bias current simultaneously and cause rolling up slag, tamper comes off to enter and will increase the molten steel field trash in the molten steel, thereby has a strong impact on slab quality, even causes continuous casting interruption accident.

As preventing that the continuous casting submersed nozzle from use producing a kind of method of obstruction, people have proposed to apply electric field between continous casting sprue and molten steel, and oxide inclusions adheres to the method for speed in the control molten steel at mouth of a river inwall.It is to the effect that: an electrode respectively is set in continous casting sprue wall and tundish, applies an electric field between two electrodes, then according to the obstruction and the erosion condition at the mouth of a river, by changing the polarity that connects an electrode, the obstruction and the erosive velocity at the control mouth of a river.But because the complexity of continuous casting submersed nozzle in moulding and process, therefore, the electrode that is connected in mouth of a river side placed it inside at the mouth of a river in advance and be connected in the forming process at the mouth of a river with the outside, for the isostatic compaction at the mouth of a river with and subsequent process etc. all can bring great inconvenience.Existing technology be at the mouth of a river this external employing is embedded that electrode is imbedded, but it is bad with contacting of the mouth of a river to do electrode like this, causes electric field instability between the mouth of a river and molten steel, has influenced continuous casting quality.

Summary of the invention

The purpose of this utility model is to provide a kind of containing to conduct electricity the continuous casting submersed nozzle of lasso, and this gate structure is simple, and the conduction lasso is reliable with being connected of mouth of a river body, conducts electricity very well.

The utility model is achieved in that a kind of containing conduct electricity the continuous casting submersed nozzle of lasso, comprise mouth of a river body, electrode, it is characterized in that: electrode is contained in the groove in the body outside, the mouth of a river for conduction lasso, conductive sleeve snare, and mouth of a river body is made by the electric conductivity refractory material.

Describedly between conduction lasso and mouth of a river body, smear the anti-oxidation electrically-conducting paint of one deck.

Described electrically-conducting paint is made up of fibrous or granular metal, alloy and other conductive materials.

The utility model is owing to adopted above-mentioned technical scheme, make it compared with prior art, the utility model is simple in structure, the electrodes conduct lasso is reliable with being connected of mouth of a river body, conduct electricity very well, thereby can between the mouth of a river and molten steel, apply electric field simply, and can suppress nozzle blocking effectively and reduce the mouth of a river to corrode.

Description of drawings

Fig. 1 conducts electricity the continuous casting submersed nozzle structural representation of lasso for the utility model contains;

Fig. 2 is an A portion enlarged diagram among Fig. 1.

Among the figure: 1 conduction lasso (electrode), 2 mouth of a river bodies, 3 mouth of a river Tu Gangkou, 4 anti-oxidation electrically-conducting paints (coating).

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Referring to Fig. 1, Fig. 2, a kind of containing conducted electricity the continuous casting submersed nozzle of lasso, comprises mouth of a river body 2, electrode 1, and electrode 1 is the conduction lasso, conduction lasso 1 is sleeved in the groove in mouth of a river body 1 outside, smears the anti-oxidation electrically-conducting paint 4 of one deck at

conduction lasso

1 and 2 of mouth of a river bodies.

Mouth of a river body 2 is made by the electric conductivity refractory material, with graphite for well; Preferably process the groove of one 2-10mm at the position that reinforces electrode, so that smear antioxidizing paint 4 and fixed electrode conduction lasso 1.The conduction lasso of reinforcing 1 can be in any position of molten steel face and upper end, the mouth of a river.In galvanization,, influence the service life and the anti-clogging at the mouth of a river and reduce erosion effect if loose contact between conduction lasso 1 and the mouth of a river body 2 will make near conduction lasso 1 mouth of a river material generate heat and the generation oxidation so.Therefore, between conduction lasso 1 and mouth of a river body 2, use the good antioxidizing paint 4 of electric conductivity, both can solve the conduction problem of 2 of conduction lasso 1 and mouth of a river bodies well, can effectively prevent the oxidation of graphite in the mouth of a river body 2 again.

Anti-oxidation electrically-conducting paint 4 can be formed nonmetallic materials such as graphite, zirconia, zirconium boride and titanium boride etc. by fibrous or granular metal, alloy and other nonmetallic materials with electric conductivity.Particularly metal wherein and alloy add fashionablely with fibrous or granular form, and conductive effect is better.In addition, also can add alundum (Al, silica and otheralkali metal fibres.

The electrodes conduct lasso 1 that is fixed in mouth of a river body 2 outsides is made of metal, alloy or other electrically conductive, non-metallic materials.With aluminium, copper, chromium, steel alloy, alloy is with ferro-aluminum, aluminium chromium, nickel chromium triangle in the metal, and nonmetallic materials are best with graphite, zirconia, zirconium boride and titanium boride etc.Conduction lasso 1 can adopt multiple modes such as screw, welding and binding to make it to be fixed in the groove in mouth of a river body 2 outsides.

Embodiment

Electrodes conduct lasso 1 is made for metallic copper, utilizes the connected mode of screw to be fixed in 1/3 place of continuous casting submersed nozzle body 2 upper ends.The gash depth of fixing conduction lasso 1 is 4mm, and the graphite-copper-zirconia that scribbles 1mm thickness in the groove is anti-oxidation electrically-conducting paint 4.Continuous casting submersed nozzle body 2 is for having the Al of satisfactory electrical conductivity ₂O ₃-C fire resistant materials.To conduct electricity the electrode that lasso 1 and opposite side insert in the tundish by lead is connected.

When cast steel begins, between two electrodes, apply a direct current electric field, between mouth of a river inwall and molten steel, form circulating current, the electric field electric current is 100A.Because it is good to have smeared one deck oxygen-proof property electrically-conducting paint 4, two interelectrode electric conductivities between mouth of a river body 2 surfaces and conduction lasso 1.When molten steel by the tundish submersed nozzle 2 of flowing through, and when telling steel mouth 3 and enter crystallizer,, effectively suppressed the possibility that sour molten aluminium produces oxidation and adheres at mouth of a river inner surface because effect of electric field makes the mouth of a river 2 low with the oxygen potential drop of molten steel contact interface.Simultaneously, because electrochemical effect, the oxide of mouth of a river inner surface produces stripping and decomposes, and further reduces the possibility of nozzle blocking.Therefore, the situation that the obstruction and the erosion at the mouth of a river in whole casting cycle, do not occur.

The utility model is simple in structure, and the electrodes conduct lasso is reliable with being connected of mouth of a river body, conducts electricity very well, thereby can apply electric field simply between the mouth of a river and molten steel, and can suppress nozzle blocking effectively and reduce the mouth of a river to corrode.

Claims

1. one kind contains and conducts electricity the continuous casting submersed nozzle of lasso, comprises mouth of a river body, electrode, and it is characterized in that: electrode is contained in the groove in the body outside, the mouth of a river for conduction lasso, conductive sleeve snare, and mouth of a river body is made by the electric conductivity refractory material.

2. according to claim 1 containing conducted electricity the continuous casting submersed nozzle of lasso, it is characterized in that: smear the anti-oxidation electrically-conducting paint of one deck between conduction lasso and mouth of a river body.

3. according to claim 2 containing conducted electricity the continuous casting submersed nozzle of lasso, and it is characterized in that: electrically-conducting paint is made up of fibrous or granular metal, alloy and other conductive materials.