CN204625752U - A kind of interpolation bucket for adding rare earth in molten steel - Google Patents

Abstract

The utility model discloses a kind of interpolation bucket for adding rare earth in molten steel, described interpolation bucket comprises staving (1), and the handle (2) be welded on this staving (1) bucket wall, described staving (1) bucket wall is also provided with some vertical long strip shape gaps (3); Compared with prior art, interpolation bucket of the present utility model cheap for manufacturing cost, without the need to coordinating miscellaneous equipment, namely can be directly used in and add rare earth in molten steel, and add the problem without nozzle clogging in rare earth process, rare earth adding quantity is large, recovery rate is high, decreases rare earth consumption, reduces cost.

Description

A kind of interpolation bucket for adding rare earth in molten steel

Technical field

The utility model relates to technical field of ferrous metallurgy, in particular a kind of interpolation bucket for adding rare earth in molten steel.

Background technology

The quality of steel ingot has very important impact to rolling, particularly inclusion property states, and grain grade distributes, processing toughness, the performances such as heat sensitivity.The beginning of the fifties U.S. Carpenter company of being applied in of rare earth in steel just carried out with the trial of RE-treated high-alloy stainless steel, along with rare earth in steel is effectively applied, and the research that a lot of producer is all correlated with and trial.At present, smelting stainless steel steel ingot completes by the technical process of electric arc furnace-argon oxygen decarburization refining stove-ladle refining furnace-continuous casting/die casting, particularly large ingot shape and some special steel grades, there is crackle in poor processability in the operation of rolling, layering, even rupture, cause rolling useless rate higher, steel ingot lumber recovery is low, seriously constrain the product development of company, increase manufacturing cost.By production practice, in molten steel, add a certain amount of rare earth by specific mode, make molten steel alloying, the object improving steel ingot processing characteristics can be reached.

The several aspect of effect main manifestations of rare earth in steel:

1) there is oxide morphology control action kou at low-sulfur steel middle-weight rare earths, can further improve ability and the impelling strength of the anti-hydrogen induced cracking of low-sulfur steel;

2) rare earth can cleaning molten steel and rotten non-metallic inclusion, improves Cast Steels, refinement equiax crystal district, reduces the dendrite arm spacing of columnar zone, alleviates the segregation of steel;

3) rare earth can improve the processing performance of cast steel, improves mobility and the splitting resistance of cast steel, reduces the hot tearing susceptibility of cast steel.

Rare earth adding technology is different, directly affects the rate of recovery of rare earth, and rare earth yield decides the residual of rare earth in steel, and the performance of rare-earth residual amount to rare earth steel plays a crucial factor.At present, rare earth adding technology mainly comprises three kinds: rare earth compound core-spun Wiring technology fed by Feeding Rare Earth Wire in Continuous Casting Mould technique, tundish technology for feeding rare-earth wires and ladle, wherein:

A, Feeding Rare Earth Wire in Continuous Casting Mould technique: be that its advantage is that rare earth recovery rate is high, and rare earth adding quantity is higher with wire feeder by the rare-earth wires of coated iron sheet feeding crystallizer, nozzle clogging does not occur, shortcoming is that rare-earth residual amount is many, and most resultant of reaction remains in steel, steel is easily caused to pollute, and RE skewness on steel billet transverse section, during Multi-strand Continuous Casting, complicated operation, when needing multiple stage wire feeder to work simultaneously, place is restricted, and also affects operation, adds equipment and manpower;

B, tundish technology for feeding rare-earth wires: be by the T-shaped mouth of the rare-earth wires of coated iron sheet feeding tundish with wire feeder, molten steel is left to crystallizer from the T-shaped mouth of tundish, its advantage is simple to operation, the recovery rate of rare earth is high, rare earth is evenly distributed in molten steel, shortcoming needs to increase equipment and the operator such as wire feeder, has nozzle clogging and rare earth adding quantity problem on the low side;

Rare earth compound core-spun Wiring technology fed by C, ladle, utilize wire feeder by the rare earth bundle component wire iron sheet of diameter 13mm by silicon calcium powder and the coated feeding ladle of rare-earth wires, advantage is simple to operate, rare earth is evenly distributed in molten steel, shortcoming is the increase in equipment and operator, the recovery rate of rare earth is low, has nozzle clogging and rare earth adding quantity problem on the low side.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of interpolation bucket for adding rare earth in molten steel, with the device being applicable to add rare earth in molten steel providing a kind of structure simple, with low cost.

The utility model is achieved through the following technical solutions:

For adding an interpolation bucket for rare earth in molten steel, comprise staving 1, and be welded on the handle 2 on this staving 1 barrel of wall, described staving 1 barrel of wall is also provided with the vertical long strip shape gap 3 of some 30cm × 5cm.

The number in the vertical long strip shape gap 3 on described staving 1 barrel of wall is 2 ~ 4.

The diameter of described staving 1 is 15 ~ 20cm, and wall thickness is 1.5 ~ 2.5mm.

Described handle 2 length is 4 ~ 5m.

The bung of described staving 1 is also provided with lid 4.

The utility model has the following advantages compared to existing technology: the utility model provides a kind of interpolation bucket for adding rare earth in molten steel, this interpolation bucket cheap for manufacturing cost, without the need to coordinating miscellaneous equipment, namely can be directly used in and add rare earth in molten steel, and the problem added without nozzle clogging in rare earth process, rare earth adding quantity is large, and recovery rate is high, decrease rare earth consumption, reduce cost.

Accompanying drawing explanation

Fig. 1 is for adding barrel structure schematic diagram;

Embodiment

Below embodiment of the present utility model is elaborated; the present embodiment is implemented under premised on technical solutions of the utility model; give detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.

Embodiment 1

Present embodiments provide a kind of interpolation bucket adding rare earth in molten steel, there is structure as shown in Figure 1, comprise the staving 1 that diameter is 15 ~ 20cm, be welded on the handle 2 on this staving 1 barrel of wall, and be located at the lid 4 at staving 1 bung place, described thickness of steel pipe 1.5 ~ 2.5mm, described handle 2 length is 4 ~ 5m; Described staving 1 barrel of wall cuts the vertical long strip shape gap 3 of 2 ~ 4 30cm × 5cm.

During use, first polished on rare earth surface, remove oxide impurity, then loaded by the rare earth of milled in the staving 1 of interpolation bucket, its bung lid 4 covers, and spot welding is closed; Then, ladle put into by the molten steel of coming out of the stove after being smelted by argon oxygen decarburization refining stove AOD, then winched to by ladle on gaza's platform, then hand-held handle 2, from the added holes of gaza's platform, the staving 1 that rare earth is housed is inserted rapidly ladle bottom, and stop 20 ~ 30 seconds, simultaneously, blow pressure argon gas in ladle, impel rare earth to be evenly distributed in molten steel, now, the rare earth added in bucket and bucket is all melted in molten steel, finally shift out handle 2, complete rare earth and add; Wherein, the pressure of blow pressure argon gas should control in, low level, to prevent molten steel exposed.

Claims (5)

1. one kind for adding the interpolation bucket of rare earth in molten steel, it is characterized in that, comprise staving (1), and the handle (2) be welded on this staving (1) bucket wall, described staving (1) bucket wall is also provided with the vertical long strip shape gap (3) of some 30cm × 5cm.

2. a kind of interpolation bucket for adding rare earth in molten steel according to claim 1, is characterized in that, the number of the vertical long strip shape gap (3) on described staving (1) bucket wall is 2 ~ 4.

3. a kind of interpolation bucket for adding rare earth in molten steel according to claim 1, is characterized in that, the diameter of described staving (1) is 15 ~ 20cm, and wall thickness is 1.5 ~ 2.5mm.

4. a kind of interpolation bucket for adding rare earth in molten steel according to claim 1, it is characterized in that, described handle (2) length is 4 ~ 5m.

5. a kind of interpolation bucket for adding rare earth in molten steel according to claim 1, is characterized in that, the bung of described staving (1) is also provided with lid (4).