CN201128745Y

CN201128745Y - Large circulation dip pipe for vacuum degassing device

Info

Publication number: CN201128745Y
Application number: CNU2007200758486U
Authority: CN
Inventors: 黄永青; 秦志民; 龚兴东
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2007-11-22
Filing date: 2007-11-22
Publication date: 2008-10-08
Anticipated expiration: 2017-11-22

Abstract

The utility model relates to a vacuum degassing device used for secondary refining in the metallurgical industry, in particular to a large-volume cycle submerged tube for vacuum degassing device (that is, RH submerged tube). The large-volume cycle submerged tube for vacuum degassing device mainly consists of an inner lining brick, a metal liner and an outer casting layer, wherein one layer of the inner lining brick is a first electrode ring. The utility model is characterized in that the profile of each brick of the first electrode ring is wedge-shaped; the wedge-shaped surface tilts outward gradually in a downward sequence from the top surface of each brick of the first electrode ring, and the lateral surface of the first electrode ring forms a cone shape. The utility model eliminates the phenomenon of upward floating of the first electrode ring in the working process, and lengthens the service life of the submerged tube.

Description

The vacuum degasser soaking tub of big cycle volume

Technical field

The utility model relates to a kind of vacuum degasser that is used for external refining in the metallurgy industry, relates in particular to the vacuum degasser soaking tub (being the RH soaking tub) of big cycle volume.

Background technology

Vacuum degasser (being the RH device) from before single taking off [H] function development till now temperature adjustment, alloying and take off C, take off S or the like, technical had a development in big strides.And these function development mainly are that bigger breakthrough has been arranged on the processing unit of de-gassing vessel, make molten steel that bigger internal circulating load arranged in vacuum oven, just are able to the variation of RH function.Present RH device, the bore and the driving gas of its soaking tub (also claiming circulation tube) generally increase, and main purpose is the internal circulating load that increases molten steel, the speed of taking off [H] and taking off [C] in order to increase.Suffered influence is sizable to anti-material for soaking tub after the increase and driving gas, has influenced the work-ing life of vacuum oven greatly.Above-mentioned driving gas is commonly called as circulation gas, is mainly used to drive molten steel round-robin prime mover.

Many functions that existing RH device is developed mainly are the improvement aspects that is based upon equipment, promptly increase exhaust capacity and increase the internal circulating load aspect, and the vacuum oven aspect has only been increased the internal diameter of RH soaking tub, and the inner lining structure of soaking tub is not made improvements; Existing RH soaking tub is referring to Fig. 1, and it mainly is made up of liner tile 6, metal inner tube 7, outer pouring layer 8, and one deck that liner tile 6 goes up most is a first layer ring brick 1, and this first layer ring brick 1 is an annular.The consequence of bringing thus is serious, and it is mainly reflected in following two aspects: a. the first layer ring brick 1 produces displacement, come-up; B. occur big brickwork joint between the first layer ring brick 1 and the second layer ring brick 4, this is because the first layer ring brick 1 come-up, displacement cause, and often produces molten steel thus and pass this brickwork joint and be penetrated into the permanent layer 5 between the adjacent R H soaking tub and cause the groove accident of wearing.Both of these case is all reflections to some extent on the RH of present big cycle volume device, do not solve at present countermeasure preferably, the hot Gunning refractory spray repair of the dependence that has is kept, and maintenance difficulties and cost are all quite high, and maintain low service life state the work-ing life of soaking tub.

The utility model content

The purpose of this utility model is to provide a kind of vacuum degasser soaking tub of big cycle volume, and this soaking tub has been eliminated the rising phenomenon that the first layer ring brick occurs in the course of the work, improves the work-ing life of soaking tub.

The utility model is achieved in that a kind of vacuum degasser soaking tub of big cycle volume, it mainly is made up of liner tile, metal inner tube, outer pouring layer, one deck that liner tile goes up most is a first layer ring brick, every brick outer side of described the first layer ring brick is wedge, the wedge face is outward-dipping gradually downwards from every brick upper surface of the first layer ring brick, and corresponding the first layer ring brick outer side constitutes taper.

Described the first layer ring brick and be arranged on the gap of leaving between the bottom land brick between adjacent two soaking tubs for the thermal expansion of bottom land brick is filled with stopping composition in this gap.Under bottom land brick thermal expansion situation, just can not contact firmly like this and cause the arch of the first layer ring brick with the first layer ring brick.

Perps is between 0.5～1mm between every brick of described the first layer ring brick.Because every brick is all bonding by glue, and therefore glue volatilization easily at high temperature reduces brickwork joint as far as possible under the situation of the bounding force that guarantees every brick.

The utility model is by changing the first layer ring brick outer shape, with the circular taper that changes into, thereby increase the fixed action of the peripheral stopping composition of the first layer ring brick to the first layer ring brick, when the first layer ring brick has come-up trend, stopping composition applies a strong downward resistance to the first layer ring brick, keep the first layer ring brick to maintain static and shake, guaranteed the stable use of the RH soaking tub of big cycle volume like this.This use novel texture is simple, is skillfully constructed, and has solved the normal the first layer ring brick rising phenomenon that occurs in the prior art.

Description of drawings

Fig. 1 is existing RH soaking tub structural representation;

Fig. 2 is the utility model RH soaking tub structural representation;

Fig. 3 is the structural representation of the first layer piece brick of the present utility model.

Among the figure: 1 the first layer ring brick, certain the piece brick in the 1a the first layer, 2 stopping composition, 3 bottom land bricks, 4 second layer bricks, 5 permanent layer, 6 liner tile, 7 metal inner tubes, 8 outer pouring layers.

Embodiment

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

Referring to Fig. 2, Fig. 3, the synoptic diagram of adjacent two RH soaking tubs has been shown among Fig. 2, be provided with bottom land brick 3 and permanent layer 5 between adjacent two soaking tubs.Following mask body is introduced the utility model: a kind of vacuum degasser soaking tub of big cycle volume, and it mainly is made up of liner tile 6, metal inner tube 7, outer pouring layer 8, and one deck that liner tile 6 goes up most is a first layer ring brick 1.The first layer ring brick 1 every brick 1a outer side is local or all be wedge, certain piece brick 1a outer side shown in Fig. 3 is local wedge, the wedge face is outward-dipping gradually downwards from the upper surface of every brick 1a, corresponding the first layer ring brick 1 local or all outer side formation tapers, the first layer ring brick 1 tapered section sectional area increases from top to bottom gradually.The first layer ring brick 1 and be arranged on the gap of leaving between the bottom land brick 3 between adjacent two soaking tubs for 3 thermal expansions of bottom land brick, be filled with stopping composition 2 (as magnesium chromium matter ramming mass) in this gap, prevent that 3 thermal expansions of bottom land brick from making confession on the first layer ring brick 1 with the first layer ring brick 1 hard the contact.Stopping composition 2 forms the back taper that matches with the first layer ring brick 1, under molten steel makes progress impact or buoyancy, the first layer ring brick 1 has the upwards trend of motion, but because the effect of the conical surface, stopping composition 2 withstands the first layer ring brick 1, the reactive force that 2 pairs of stopping composition that have a conical surface have the first layer ring brick 1 of the conical surface improves greatly, and the first layer ring brick 1 of the present utility model firmly is fixed on the original position and moves on not, thereby has avoided molten steel to enter permanent layer 5 between adjacent two soaking tubs.

Owing to all use glue bonding between every brick 1a of the first layer, glue at high temperature can volatilize, therefore perps is controlled between 0.5～1mm between every brick 1a of the first layer, under the situation that guarantees bounding force, reduce the slit between brick and the brick so as far as possible, reduced the free activity space of the glue volatilization every brick 1a in back.

Through probationary certificate, be greatly improved work-ing life of the present utility model, thereby eliminated obstacle for the use of big cycle volume RH device.

Claims

1. the vacuum degasser soaking tub of a big cycle volume, it mainly is made up of liner tile, metal inner tube, outer pouring layer, one deck that liner tile goes up most is a first layer ring brick, it is characterized in that: every brick outer side of described the first layer ring brick is wedge, the wedge face is outward-dipping gradually downwards from every brick upper surface of the first layer ring brick, and corresponding the first layer ring brick outer side constitutes taper.

2. the vacuum degasser soaking tub of big cycle volume according to claim 1, it is characterized in that: described the first layer ring brick and be arranged on the gap of leaving between the bottom land brick between adjacent two soaking tubs for the thermal expansion of bottom land brick is filled with stopping composition in this gap.

3. the vacuum degasser soaking tub of big cycle volume according to claim 1 and 2, it is characterized in that: perps is between 0.5～1mm between every brick of described the first layer ring brick.