DE7008854U - DEVICE FOR PASTING UNDER SHIELD GAS. - Google Patents

Description

Fried. Krupp March 10, 1970

Hüttenwerke AG

46 ^ Bochum
Plague compartment 1370

Device for potting under protective gas

The invention relates to an apparatus for the casting of i'.etallen, in particular steel, (ic igefäß Zv ^T *) under protective gas with a ladle shroud to a hollow body connectable via a seal, which extends in the direction of a casting pipe or a mold.

3c: ini casting of liquid metals, in particular of steel with oxygen-affine elements, ^{the following undesirable side effects occur Iv- * the air contact of the C-ie n} jet between the par,;:., Ui: d the pouring pipe or the mold:

the oxygen-dependent elements are obtained by oxidation in steel-damaging non-metallic connections over,

the pouring stream absorbs ase from the surrounding air.

To avoid these disadvantages, it is advisable to protect the pouring stream from external influences through a protective gas atmosphere to protect.

It is known to protect the pouring stream with a gas curtain. For this purpose, a ring tube is attached to the ladle spout attached, which is provided with a ring of gas outlet holes on its bottom surface. The gas flowing downwards surrounds the pouring stream with a protective gas curtain.

70 / 4C7

Ge / BTa

700885426.11.70

The disadvantage of this device is in particular that that even with an uneconomically high gas consumption a 100 ^ iger protection can not be achieved.

For this reason one has semi-rigid connections between Pan and pouring pipe or mold proposed. 3 such a thing Device shows Pig. I.

Fig. 1 shows the pouring pipe 2 on which the sand cup Z sit.:t. In this sandy cup of the Z attached to the spout of the pan '> via a seal 5 pipe lowers 1. This semi-rigid connection, a protective gas atmosphere can be achieved with economical gas consumption. A disadvantage is the transfer of larger fluctuations in the ladle υ to the pouring pipe 2. In addition, the device becomes unusable in most cases when the pouring pipe 2 overflows.

The invention has the task set, this i: a.chteile to eliminate and to form a device having a ^"; robe> would take from the pouring stream permits.

This object is achieved according to the invention in that the rigid hollow body in a flexible, refractory cloth protruding over the upper part of the pouring pipe or the mold continues and on its outer surface with an up and Downward movement in relation to the direction used for the ladle spout is provided.

Its flexible connection between the pan (intermediate pan) and the mold is already known in continuous casting 'Journal of Metals 38, 195C, page 3G / 95). This device consists of a fireproof cloth covered with a seal; Pan bottom and is surrounded on the outside by a spiral spring for stability (loc. cit., Fi ^. 1, Fig. 9 and page 92, column 2 and 3 '

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The disadvantage of this """organization developed for continuous casting was that cleaning (repelling: - /. Des" fa: i:; ena: c.3-; sc; es and sampling from de :: :.! nie.3 ~ tr "hl not r.ö ~ Lich si" .d This Ir.chteile veröen by j, rfi-i lunr eliminated.

The device according to the invention preferably has a: n upper. The rigid hollow body has a support channel for the seal.

It is convenient to use the fire-resistant, flexible cloth at the bottom End of the rigid hollow body with a tightening strap and a C-ie.3 tube or the 'kille' with a wire loop - .. 'initially gas-tight to fix.

The protective gas is preferably supplied through an annular tube with gas outlet holes located at a gas connection. The ring tube is attached to the inner surface of the rigid hollow body.

The rigid hollow body advantageously has an upward and downward movement In relation to the pan spout, in the upper third of its outer surface, two pegs for hanging in scissors. The scissors can be hung on the side of the pan wall at one point on their extension arm by means of a chain and thus acts as a lever arm.

An exemplary embodiment of the invention is shown in the drawing and is described in more detail below. It shows:

FIG. 2 shows the sketch of a side view of the device. FIG. 3 shows a side view offset by 90 ° from FIG. 2

Fig. 2 and 3 show the rigid hollow body, which as a ring piece is executed. This ring piece 9 contains a ring tube on the inside

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11 :: iit upward and downward-facing closely-drilled ι gas outlet holes and an external gas connection 12.

On the outside of the ring piece 9 pins I ^ are attached to the scissors 19 in the upper third. Further the ring piece 9 has a support groove 14 for the seal

15 (z.3. Asbestsciriur) between the bottom of the pan ΐβ and the ring piece 9

At the lower end of the ring piece 9 is by means of a tightening strap 17 to one. Tube shaped cloth 10 made of fiberglass or asbestos fabric attached. This cloth surrounds the pouring pipe 20 and is fenced in by means of a wire loop l8.

The scissors required to move up and down is 19 suspended from the wall of the pan by means of a chain.

During operation, the shielding gas device is fitted with your rigid ring piece 9 slipped up onto the pouring pipe 20 and hooked into the scissors 19. After setting up the pan exactly

16 above the pouring pipe 20, the sprue is initially only below the protection of the gas curtain emerging from the holes in the annular tube 11.

By moving the ladle 1β, the flow of the pouring stream can still be corrected under sight. So then with the help of the scissors 19, the protective gas device is raised further and sealing pressed against the bottom of the pan. The cloth 10 is fenced tightly to the pouring pipe 20 by means of the wire loop 18.

By lowering the device, the temperature can be measured during casting and samples can be taken from the pouring stream. During these short periods, the pouring stream is through the

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Protected gas cactus eggs.

Another advantage of the device reads in the fact that the spout can be pushed off during pouring. After an occasional overflow of GieBrohres that can possibly damaged ¹ I ¹ UCh with v, ^T enigen handles to be replaced immediately.

£ claim:

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Claims (5)

Device for casting metals,! In particular Steel, under protective gas r: it one.) To a pan outlet ~ u.? (Zrischer.gefäß) can be connected via a seal rigid hollow body that calibrates in the direction of a pouring pipe or a hokille, characterized in that that the rigid hollow body (9) in a flexible, refractory, over the upper part of the pouring pipe (20) or the cloth IC protruding from the mold continues '■ and on its outer surface with one for upwards and downwards movement in relation to the spout of the pan (lo) serving Device f3, 19) ^ can be seen. 2. Device according to claim 1, characterized in that the rigid hollow body (9) at its upper end has a support channel (l ¹ -! ·) For the seal. l ,. Device according to claim 1 or 2, characterized in that the cloth (10) is fastened largely gas-tight to the lower end of the rigid hollow body (9) with a tensioning strap (17) and to the pouring pipe (20) or mold with a wire loop (ic) is. η. Device according to one of Claims 1 to J>, characterized in that a tube (11) with gas outlet holes lying at a gas connection (12) is attached to the inner surface of the rigid hollow body (9). 5. Device according to one of claims 1 to h, characterized in that the rigid hollow body (9) to the up and Arv: "rtsbe ^T /; egung in the upper third of its outer surface two Hapfc. (13) for hanging a pair of scissors ( 19). 700885426.11.70