CN207239145U

CN207239145U - A kind of anti-risk steel submersed nozzle

Info

Publication number: CN207239145U
Application number: CN201720413633.4U
Authority: CN
Inventors: 李明; 陈兴华; 马骏; 翟卫江
Original assignee: Nanjing Iron and Steel Co Ltd
Current assignee: Nanjing Iron and Steel Co Ltd
Priority date: 2017-04-19
Filing date: 2017-04-19
Publication date: 2018-04-17
Anticipated expiration: 2027-04-19

Abstract

The utility model discloses a kind of anti-risk steel submersed nozzle, chamber, mouth of a river body, mouth of a river liner, mouth of a river slag line and water-gap outlets are led directly to including the rim of a bowl, inner cavity, the mouth of a river, mouth of a river body upper end is fixedly connected with the rim of a bowl, the rim of a bowl lower end is fixedly connected with inner cavity on the body of the mouth of a river, inner cavity lower end is that the mouth of a river leads directly to chamber on the body of the mouth of a river, inner cavity and the mouth of a river lead directly to chamber and are equipped with mouth of a river liner on the body of the mouth of a river, and mouth of a river body lower end is fixedly connected with mouth of a river slag line, and mouth of a river slag line lower end is equipped with water-gap outlets；Anti-risk steel submersed nozzle designed by the utility model can improve the anti-clogging effect of submersed nozzle, improve split mouth of a river leakproofness, reduce the harm of mouth of a river air-breathing；Effectively reduce the mouth of a river and emit the generation of steel, reduction changes mouth of a river number and changes the mouth of a river and gives up base amount.

Description

A kind of anti-risk steel submersed nozzle

Technical field

The utility model belongs to casting technology field, more particularly to a kind of anti-risk steel submersed nozzle.

Background technology

In the continuous casting of molten steel, manufacture is referred to as the width dimensions of molten steel injection crystallizer during the strand of so-called slab In the past less than about 2000mm；Recently, occur by big particularly from about more than the 2000mm of width dimensions and below short side 150mm Big width crystallizer carry out high speed operation；In the cast of such big width crystallizer, from the stream steel of submersed nozzle The steel flow of hole outflow is diffused near crystallizer end, and flow velocity dies down, but also under the influence of throwing, partially toward steel outlet hole position Lower section is put, the retentate portion for lacking mobility is easily produced in the upside of crystallizer end；In addition, flowing in crystallizer is not yet Stablize, reflux and other local bias currents brokenly occur for the various parts in crystallizer with the time by not stopping The turbulent flow of the steel flows such as ground change, and liquid surface (" fluctuation ", " fluctuating ", " conversion of flow direction ") caused by them Deng field trash cannot fully float near the end of strand, and covering slag cannot equably be moved to casting billet surface, cause to protect Slag, field trash are unevenly rolled into strand inside etc.；It is difficult to obtain for the base in the process of setting of molten steel in addition, also producing Hull shape into required or preferable molten steel in mold Temperature Distribution the problems such as；In this way, harmful effect, drawing to slab quality Dangerous wait of leakage also increases.

Patent No. 200920104825.2, a kind of entitled blockage proof submerged nozzle for square billet continuous casting of patent；It is main to be situated between Continued a kind of billet continuous casting anti-clogging exterior submersed nozzle, its feature is what the following internal diameter of slag lining was exported to molten steel Internal diameter is bigger than slag lining internal diameter, can strengthen mouth of a river anti-clogging effect, but can expand for the higher steel grade mouth of a river in some oxygen positions Footpath, service life are restricted；The utility model redesigns the mouth of a river on the basis of existing mouth of a river appearance profile is not changed Internal structure, improves liner material, improves mouth of a river inner cavity flow field, reduces water gap bowl portion and emits steel, while has good versatility And service life.

Utility model content

The utility model provides a kind of anti-risk steel submersed nozzle to solve technical problem present in known technology.

The utility model is adopted the technical scheme that to solve technical problem present in known technology：A kind of anti-risk steel Submersed nozzle, including the rim of a bowl, inner cavity, the mouth of a river lead directly to chamber, mouth of a river body, mouth of a river liner, mouth of a river slag line and water-gap outlets, the mouth of a river Body upper end is fixedly connected with the rim of a bowl, and the rim of a bowl lower end is fixedly connected with inner cavity on the body of the mouth of a river, and inner cavity lower end is on the body of the mouth of a river The mouth of a river leads directly to chamber, and inner cavity and the mouth of a river lead directly to chamber and be equipped with mouth of a river liner on the body of the mouth of a river, and mouth of a river body lower end is consolidated with mouth of a river slag line Fixed connection, mouth of a river slag line lower end is equipped with water-gap outlets.

Further technical solution as the present invention：

Further, the inner cavity below the rim of a bowl is funnel type.

Further, the internal diameter of funnel type inner cavity is less than water-gap outlets internal diameter.

Further, body material in the mouth of a river is Al2O3-C materials, and mouth of a river slag line is ZrO2-C materials, mouth of a river liner be without The magnesium aluminate spinel of carbon, mouth of a river thickness of inner lining are 10mm.

Further, the rim of a bowl coordinates with inner cavity for sphere-contact, while graphite grazing pad is put on contact surface.

The utility model has the advantages and positive effects of：Since the utility model can improve the anti-of submersed nozzle Ponding, improves split mouth of a river leakproofness, reduces the harm of mouth of a river air-breathing；The generation that the mouth of a river emits steel is effectively reduced, reduction is changed Mouth of a river number and change the mouth of a river and give up base amount.It can not only solve general common mouth of a river oxide to block, also can effectively solve in special steel Nozzle blocking problem in casting process；Submersed nozzle coordinates with middle water-coating port for sphere-contact, same to be put into graphite grazing pad, Improve mouth of a river leakproofness；Submersed nozzle molten steel entrance is funnel type, is conducive to molten steel and forms turbulent flow, reduces molten steel entrance Cold steel or field trash aggregation is formed, the phenomenon blocked up at the mouth of a river is reduced and occurs；Mouth of a river liner is carbon-free magnesium aluminate spinel material, effectively anti- The only reaction between molten steel and mouth of a river liner, greatly reduces the probability of nozzle clogging.The internal diameter D4 ratios of water-gap outlets inner diameter outlet Funnel type exit inside diameter is big, can strengthen mouth of a river anti-clogging effect.

Brief description of the drawings

Fig. 1 is the structure diagram that the utility model embodiment provides.

In figure：1- the rims of a bowl, 2- inner cavities, the 3- mouths of a river lead directly to chamber, 4- mouths of a river body, 5- mouths of a river liner, 6- mouths of a river slag line, 7- water Mouth outlet.

Embodiment

For that can further appreciate that the utility model content of the utility model, feature and effect, following embodiments are hereby enumerated, and Attached drawing is coordinated to describe in detail as follows.

The structure of the anti-risk steel submersed nozzle of the utility model is explained in detail with reference to Fig. 1.It is a kind of anti-risk Steel submersed nozzle, including the rim of a bowl 1, inner cavity 2, the mouth of a river lead directly to chamber 3, mouth of a river body 4, mouth of a river liner 5, mouth of a river slag line 6 and the mouth of a river Outlet 7, body 4 upper end in the mouth of a river is fixedly connected with the rim of a bowl 1, and 1 lower end of the rim of a bowl is fixedly connected with inner cavity 2 on mouth of a river body 4, mouth of a river sheet 2 lower end of inner cavity is that the mouth of a river leads directly to chamber 3 on body 4, and inner cavity 2 and the mouth of a river lead directly to chamber 3 and be equipped with mouth of a river liner 5, the mouth of a river on mouth of a river body 4 4 lower end of body is fixedly connected with mouth of a river slag line 6, and slag line 6 lower end in the mouth of a river is equipped with water-gap outlets 7.

Further, the inner cavity 2 of the lower section of the rim of a bowl 1 is funnel type.

Further, the internal diameter of funnel type inner cavity 2 is less than 7 internal diameter of water-gap outlets.

Further, body 4 material in the mouth of a river is Al2O3-C materials, and mouth of a river slag line 6 is ZrO2-C materials, and mouth of a river liner 5 is not Carbon containing magnesium aluminate spinel, 5 thickness of mouth of a river liner are 10mm.

Operation principle：D1 is to coordinate internal diameter with middle water-coating port, and D2 is funnel type import internal diameter, and D3 is in funnel type outlet Footpath, D4 are water-gap outlets internal diameter, and D4>D3；Body is Al2O3-C materials, and slag line is ZrO2-C materials, and liner is carbon-free Magnesium aluminate spinel；Thickness of inner lining is 10mm；Submersed nozzle coordinates with middle water-coating port for sphere-contact, same to be put into graphite grazing Pad, it is that funnel type is coniform to improve mouth of a river leakproofness submersed nozzle molten steel entrance, is conducive to molten steel and forms turbulent flow, reduces steel Liquid entrance forms cold steel or field trash aggregation, reduces the phenomenon blocked up at the mouth of a river and occurs；The internal diameter D4 ratios of water-gap outlets inner diameter outlet Funnel type exit inside diameter is big, can strengthen mouth of a river anti-clogging effect.

The utility model can improve the anti-clogging effect of submersed nozzle, improve split mouth of a river leakproofness, reduce the mouth of a river The harm of air-breathing；Effectively reduce the mouth of a river and emit the generation of steel, reduction changes mouth of a river number and changes the mouth of a river and gives up base amount；It can not only solve general Common mouth of a river oxide blocks, and also can effectively solve the problems, such as the nozzle blocking in special steel casting process；Submersed nozzle with Middle water-coating port coordinates for sphere-contact, with graphite grazing pad is put into, improves mouth of a river leakproofness；Submersed nozzle molten steel entrance is Funnel type, is conducive to molten steel and forms turbulent flow, reduces molten steel entrance and forms cold steel or field trash aggregation, reduces the phenomenon that the mouth of a river is blocked up Occur；Mouth of a river liner is carbon-free magnesium aluminate spinel material, effectively prevents the reaction between molten steel and mouth of a river liner, greatly reduces water The probability of mouth dross.

It the above is only the preferred embodiment to the utility model, not make limit in any form to the utility model System, it is every according to the technical essence of the utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, Belong in the range of technical solutions of the utility model.

Claims

1. a kind of anti-risk steel submersed nozzle, including the rim of a bowl, inner cavity, the mouth of a river lead directly to chamber, mouth of a river body, mouth of a river liner, mouth of a river slag Line and water-gap outlets, it is characterised in that the mouth of a river body upper end is fixedly connected with the rim of a bowl, the rim of a bowl lower end on the mouth of a river body It is fixedly connected with inner cavity, inner cavity lower end is that the mouth of a river leads directly to chamber on the mouth of a river body, and inner cavity and the mouth of a river are straight on the mouth of a river body Cavity is equipped with mouth of a river liner, and the mouth of a river body lower end is fixedly connected with mouth of a river slag line, and the mouth of a river slag line lower end is equipped with water Mouth outlet.

2. anti-risk steel submersed nozzle according to claim 1, it is characterised in that the inner cavity below described the rim of a bowl is funnel Type.

3. anti-risk steel submersed nozzle according to claim 1, it is characterised in that the internal diameter of the inner cavity goes out less than the mouth of a river Mouth internal diameter.

4. anti-risk steel submersed nozzle according to claim 1, it is characterised in that described the rim of a bowl and inner cavity are sphere-contact Coordinate, while graphite grazing pad is put on contact surface.