RU3572U1 - BUCKET SHUTTER - Google Patents

Abstract

A bucket closure comprising a casting cup, a refractory insert installed coaxially with it, an upper fixed plate and a lower movable plate connected to the displacement drive, a collector cup installed under the lower movable plate, characterized in that the casting cup is made of corundum or periclase-carbon refractories, the movable and fixed slabs are made of periclase, while the refractory insert and the collector glass are made of forsterite.

Description

The proposal relates to metallurgy and, in particular, to devices for casting steel from steel-pouring ladles.

Known sliding bucket or slide gate, which contains a casting cup installed in the nest block of the lining of the bucket, a fixed plate connected to it on a refractory binder, a movable plate connected to a displacement drive, and a collector glass mounted under the movable plate and fixed on it ./1/.

A disadvantage of the known shutter is its low resistance.

This is due to the destruction of the through channel under the action of liquid metal during the casting process. The plates and the collector cup are most destroyed due to thermal, chemical and abrasive wear, as well as dust formation. Replacing these shutter elements necessitates replacing the pouring cup. To remove the glass after each casting, it is intensively blown with oxygen from the inside of the bucket, which leads to severe wear of the socket block. Since the durability of the lining of ladles is determined by the durability of the nesting blocks, the use of a known valve requiring the removal of the glass after each casting determines the durability of the lining of the bucket. Currently, this resistance does not exceed 19.5 heats.

The closest in technical scope and the achieved technical result is a bucket lock containing an upper fixed and lower movable one with a moving drive, refractory plates, a pouring glass and a refractory head mounted above the fixed plate and a collector glass installed under the lower movable plate. / 2 /.

Bucket lock

The disadvantage is the high cost of refractories.

The objective of the proposal is to create a shutter, the degree of wear of individual refractory elements which corresponds to pre-established working conditions.

The desired technical result is a reduction in operating costs, ease of maintenance, and a reduction in the preparation time of the ladle for receiving melting.

The technical result is achieved by the fact that in the known valve containing a pouring glass, refractory insert: the upper fixed and lower fixed plates and the collector glass installed below the movable plate, on the proposal, the filling glass is made of corundum or periclase-carbon refractories, composite plates of periclase, and the insert and a glass collector made of forsterite.

The proposal is based on the fact that the gate elements most worn during operation should be made of refractory materials, guaranteed to support one casting. Such shutter elements include an insert, composite plates and a collector glass. This allows to exclude survey operations, their cleaning, fitting, etc. The assembly of the shutter is facilitated and simplified. Such refractories have a lower cost compared to high quality refractories. Less wear elements (pouring cup) - on the contrary, they should be made of refractory materials that are optimally suitable

casting conditions.

The figure shows a section of a bucket shutter.

The bucket bolt contains a pouring cup 1, mounted in the lining of the bucket with a high alumina coating, a refractory insert 2, an upper fixed 3, a plate and a lower movable plate 4, which can be moved using a drive (not shown in Fig.)

collector cup 5 connected to the bottom plate 4. Holes 6 are made in the pouring cup, insert, plates and collector cup.

The bucket lock works as follows: during casting, metal from the casting ladle through holes 6 in the corundum or periclase-carbon pouring cup 1 forsterite insert 2, upper 3 and lower 4 periclase plates and forsterite collector cup 5 with a mass flow rate of 2.0 - 2.2 t / min into a poured container. The metal flow rate is controlled by moving the lower movable plate 4 and the collector cup 5 associated with it. At the end of the casting, the plate 4 moves until the opening 6 is completely blocked.

Comparison of specific costs for refractories per ton of steel when using the known and proposed valves is shown in the table. Casting was carried out from a 160t ladle with a mass speed of 2.0-2.2t / min. The amount of metal poured through the known and proposed valves was the same and amounted to 3939.66 tons

As a result of the application of the proposed shutter, the unit cost per ton of steel is reduced by 4 4.5%, the time for preparing the ladle to receive the melting is reduced, maintenance is simplified.

List of used literature.

/ 56 / I.I. Bornatsky, V.F. Mikhnevich, S.A. Yargin Production cTajra M. Metallurgy 1991 pp. 3620363.

USSR copyright certificate No. 1044428 B 22 D 41/08

published on 09/30/83.

Claims (1)

A bucket closure comprising a casting cup, a refractory insert installed coaxially with it, an upper fixed plate and a lower movable plate connected to the displacement drive, a collector cup installed under the lower movable plate, characterized in that the casting cup is made of corundum or periclase-carbon refractories, the movable and fixed slabs are made of periclase, while the refractory insert and the collector glass are made of forsterite.