CN106623878A

CN106623878A - Continuous casting ladle cover and manufacturing method thereof

Info

Publication number: CN106623878A
Application number: CN201611011517.6A
Authority: CN
Inventors: 朱宁; 邓俊棕; 钱志友; 伏兆勇; 王雄文; 曹余良
Original assignee: Nanjing Iron and Steel Co Ltd
Current assignee: Nanjing Iron and Steel Co Ltd
Priority date: 2016-11-17
Filing date: 2016-11-17
Publication date: 2017-05-10

Abstract

The invention discloses a continuous casting ladle cover. The continuous casting ladle cover comprises a cylindrical frame with the bottom end being closed and the upper end being open. Y-shaped reinforcing ribs which are distributed at intervals are welded to the inner bottom end of the frame, and the heights of the reinforcing ribs are smaller than the height of the frame, and the reinforcing ribs are away from the top of the frame by 45-50 mm. The frame is internally filled with magnesia castables mixed with steel wire fibers, the reinforcing ribs are covered with the magnesia castables, the steel wire fibers and the reinforcing ribs are connected to form a double-skeleton structure, and in the magnesia castables, the reinforcing ribs, the steel wire fibers and the magnesia castables form a honeycomb structure. The continuous casting ladle cover is formed by the magnesia castables in a pouring manner and is high in non-deformability and not prone to disengaging, the difficulties that the service life of a continuous casting ladle cover is short and the continuous casting ladle cover is frequently changed are successfully solved, the continuous casting ladle cover is stable to use and good in sealing and heat preserving performance, and the service life is greatly prolonged.

Description

Big bag clad of a kind of continuous casting and preparation method thereof

Technical field

The invention belongs to the big bag clad of field of metallurgy, concrete this says it is a kind of big bag clad of continuous casting and its making side Method.

Background technology

Field of metallurgy, the big bag clad effect of continuous casting is to prevent molten steel heat radiation from causing temperature drop to affect molten steel continuously cast property Can, fully play heat insulation effect.The big bag clad of traditional continuous casting is the big clad of cellulosic, is damaged when in use serious, and the life-span is low, main Reason is wanted to be the high temperature heat radiation by more than 1500 DEG C molten steel, filament contraction and efflorescence, while big bag mouth work under bad environment, residual The mechanical failure of steel, residue to cellulosic clad；If in addition, the big bag clad service life of continuous casting is low, needing frequently to change, more There is huge potential safety hazard in work high above the ground when changing.

The content of the invention

The technical problem to be solved is：Big bag clad of a kind of continuous casting and preparation method thereof is proposed, to reach drop Low cost, improves clad heat-insulating property, extends the purpose of clad service life.

The present invention solves the technical scheme of above technical problem：

A kind of big bag clad of continuous casting, including the cylindrical frame of bottom end closure, open upper end, bottom is welded with interval in framework " bifurcation " font reinforcement of distribution, the height of reinforcement is less than frame height and apart from frame roof 45-50mm；Filling in framework There is the castable of mixing steel wire fibre, castable covers reinforcement, and steel wire fibre connects and composes double bones with reinforcement Frame structure, castable each reinforcement of inside constitutes honeycomb with steel wire fibre and castable.

So, using " bifurcation " font reinforcement structure of reinforcement, and reinforcement is tied with double skeletons of steel wire fibre composition Structure, by castable moulding by casting, non-deformability is strong, difficult for drop-off, successfully solves the big bag clad of continuous casting and uses the longevity Life is low, changes frequently difficult point, and using stablizing, sealing thermal insulation is functional, and service life is substantially improved.

Applicant has found by studying, big bag clad in the high temperature heat radiation by more than 1500 DEG C molten steel, often certain One position centralized head load, so as to cause big bag clad position to be damaged, so as to need individually to repair to losing damage position, sometimes When impaired serious, in addition it is also necessary to change big bag clad, cause frequently to repair and change；Therefore, a certain portion of big bag clad how is solved Part is damaged serious technical problem, is another new technical problem that the present invention finds.

The present invention solves the technical scheme of above technical problem：It is in tree ring shape circle that reinforcement is arranged in framework bottom Shape is distributed, and often encloses reinforcement diametric at intervals of 180-200mm, constitutes between each reinforcement of each circle reinforcement Spacing is 110-150mm, and " bifurcation " font reinforcement upper end of two adjacent rings reinforcement replaces anyhow to the pawl that both sides are launched.

So, by arranging the round distribution shape of reinforcement, spacing often between interval, each reinforcement of circle reinforcement And reinforcement upper end replaces anyhow to the pawl that both sides are launched, high warm spoke can be made with the high temperature heat radiation of uniform pickup molten steel The heat penetrated relatively uniform in big bag clad can be distributed to everywhere, it is to avoid a certain position and in be heated, further improve Big bag clad service life, it is to avoid frequently sectional repair；

The preparation method that the present invention also proposes a kind of big bag clad of continuous casting, comprises the following steps：

(i) " bifurcation " font reinforcement is welded on on request bottom in framework；

(ii) interior in the framework for weld reinforcement, knotting vibration is cast in after castable is stirred with steel wire fibre After 10-15 minutes, standing puts 72-80 hours, then carries out low-temperature bake and is dried 7-10 days, and the baking temperature is less than or equal to 300℃。

The invention has the beneficial effects as follows：The big bag clad service life of continuous casting that successfully solves of the invention is low, changes frequently Difficult point, using " bifurcation " font reinforcement structure of reinforcement, and double skeleton structures of reinforcement and steel wire fibre composition, by magnesium Matter castable moulding by casting, non-deformability is strong, difficult for drop-off；The clad of the present invention is using stablizing, and sealing thermal insulation is functional, Service life is substantially improved, and is lifted more than 3200 stoves/part by 130 stoves/part, and cost-effective about 6.5 ten thousand yuan/part, production cost is big Width is reduced, while reducing big bag clad frequently changes work high above the ground risk.

Description of the drawings

Fig. 1 is the structural representation of the big bag clad of continuous casting of the present invention.

Specific embodiment

Embodiment 1

The present embodiment is a kind of big bag clad of continuous casting, and structure is as shown in figure 1, including bottom end closure, the cylinder of open upper end Shape framework 1, bottom is welded with " bifurcation " the font reinforcement 2 being spaced apart in framework 1, the height of reinforcement 2 less than frame height and Apart from frame roof 45-50mm；Filled with the castable 3 of mixing steel wire fibre 4 in framework, castable 3 is covered and added Strong muscle 2, steel wire fibre 4 connects and composes double skeleton structures with reinforcement 2, and each reinforcement of inside of castable 3 is fine with steel wire Dimension and castable constitute honeycomb.Reinforcement 2 is distributed in framework bottom in tree ring shape round, often encloses reinforcement and exists It is diametric that at intervals of 180-200mm, the spacing constituted between each reinforcement of each circle reinforcement is 110-150mm, and " bifurcation " font reinforcement upper end of two adjacent rings reinforcement replaces anyhow to the pawl that both sides are launched.

The preparation method of the big bag clad of continuous casting, comprises the following steps：

(ii) interior in the framework for weld reinforcement, knotting vibration is cast in after castable is stirred with steel wire fibre After 10-15 minutes, standing puts 72-80 hours, then carries out low-temperature bake and is dried 7-10 days, and the baking temperature is less than etc. In 300 DEG C.

The big bag clad of the present embodiment is installed on the big bag turning arm top of conticaster, and the automatic swivelling cover bag to after platform is wrapped greatly Lid, good airproof performance, high temperature resistant, using the big bag clad of 3200 stoves without deformation, without coming off, service life is big compared with original 130 stove for tracking Width rises, and achieves obvious economic benefit and safety benefit.

In addition to the implementation, the present invention can also have other embodiment.All employing equivalents or equivalent transformation shape Into technical scheme, all fall within the protection domain of application claims.

Claims

1. a kind of big bag clad of continuous casting, including the cylindrical frame of bottom end closure, open upper end, it is characterised in that the framework Interior bottom is welded with " bifurcation " the font reinforcement being spaced apart, and the height of the reinforcement is less than the frame height and apart from described Frame roof 45-50mm；Filled with the castable of mixing steel wire fibre in the framework, the castable covers institute Reinforcement is stated, the steel wire fibre connects and composes double skeleton structures, each reinforcement of the castable inside with reinforcement Honeycomb is constituted with the steel wire fibre and castable.

2. the big bag clad of continuous casting as claimed in claim 1, it is characterised in that：The reinforcement is in trees in the framework bottom Year colyliform round distribution, often encloses reinforcement diametric at intervals of 180-200mm, constitutes each reinforcement of each circle reinforcement Spacing between muscle is 110-150mm, and " bifurcation " font reinforcement upper end of two adjacent rings reinforcement is horizontal to the pawl that both sides are launched It is perpendicular to replace.

3. the preparation method of the big bag clad of continuous casting as claimed in claim 1 or 2, it is characterised in that：Comprise the following steps：

(ii) interior in the framework for weld reinforcement, knotting vibration 10- is cast in after castable is stirred with steel wire fibre After 15 minutes, standing puts 72-80 hours, then carries out low-temperature bake and is dried 7-10 days, and the baking temperature is less than or equal to 300 ℃。