DE2313577A1 - DEVICE FOR CREATING THE INNER CYLINDRICAL CAVITY OF A CONTINUOUS CAST BLOCK - Google Patents

Description

TuIskij filial Central "nogo Naucno- P 4-7 108/2 issledovatel'skogo instituta Sernoj /.q Harz 1973 metallurgii imeni I.P. Bardina

Tula / üdSSE ■

VOBRICBURJH ¹ Gr TO SIGN UP BES IKKEBM CAVITY SIKSS SxRANÜGUßBLOCKES

The present invention relates to continuous casting plants for steel and metals, in particular a device for producing the inner cylindrical cavity of Continuously cast ingots.

It is already a device for generating the inner Cavity of continuous cast blocks in the continuous caster known for steel and metals, which is a rod-shaped mandrel, the outer surface of the inner cavity of the

corresponds to the block to be cast. The thorn is the circumference provided with communicating longitudinal openings for the coolant to pass through. Furthermore, the mandrel has a

Inner / central channel, in which one along the axis

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Device for supplying the coolant to the inner cavity of the continuous casting block is provided, the coolant supply behind the mandrel in the direction of movement of the strand Casting block takes place. "The clearance between the device and the inner surface of the channel serves to deduct the cooling of the continuous casting block formed gas / water mixture.

Since the crust that was forming around the thorn was cleared Metal under the influence of the occurring temperature stresses is subject to deformation, it detaches from the cooling surface

she / ^a ^ · /

before the thorn locally, it is severed o & it ^ bursts "In-

^ as gap, the / consequently a .. the cooling intensity arises

the resulting crust at this point is significantly reduced and thus their further growth disturbs what led to the breakthrough the metal crust behind the mandrel in the direction of movement of the

f ■

Continuous casting block and can lead to the metal draining into its cavity.

The cooling of the inner cavity of the continuous casting block also takes place in the area of the "mandrel." ISI arm transition between the mandrel wall and the metal to be cooled. There is no direct contact between the cooling medium and metal in this device. The existing cooling is not enough to get the required thickness of the crust to achieve in the mandrel area, which enables the casting of hollow blocks in the continuous steel caster at high speeds, comparable with those for continuous casting of full cross-sections. allowed.

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The invention is based on the object of providing a device for producing the inner cylindrical cavity of the continuously cast ingot at the continuous caster for metals to create

the thorn and the

which makes it possible to form the gas gap between them Reduce the crust of the solidifying metal to the minimum in order to reduce the cooling intensity by increasing the Increase the casting speed of hollow blocks.

This task becomes '__'']"'"'"..'. JP ^ei LT a device for creating the inner cylindrical cavity

the/

of continuously cast ingots' in the continuous caster, for metals

and/
is wound which is a rod-shaped metal mandrel, the outer surface of the 'corresponds cast block and on the periphery of' the internal cavity to communicate with each other openings for the passage of the coolant and

.. 'interior /

has a central channel in whose .längs the

A device for supplying coolant to the inner cavity of the continuous casting block behind the mandrel in the direction of movement of the axis Continuous casting block is provided while the clearance between

the/

the device and the inner surface of the duct are used to draw off the gas-water mixture that occurs when the continuously cast ingot is cooled,

^ its outer surfacey solved according to the invention in that "'der'Dorn an'X ^^' with longitudinal grooves

by doing/ . "." "" '

... area is provided, where the strength of the metal crust on the inner surface of the ~ ~ u ~ cast block prevents it from bending into the hat, each groove with the

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a / central channel connected by "" "." _ "openings and for suction] of the gas-water mixture formed when the coolant is supplied to the inner cavity of the pouring block is for an intensive and even cooling of the black inner cavity to ensure.

The uniformity of the cooling is achieved by

Gas space /

that the influence of the _ between the mandrel and the crust in the inner cavity of the continuously cast ingot to be cooled is excluded is.

"It is beneficial to be on the outer surface of the

Thorn between the for sucking through the gas-water mixture to provide additional longitudinal grooves for certain longitudinal grooves,

which are connected to the openings for the passage of the coolant__ and for the / __ ._ Coolant supply from the openings to the cavity of the

"" "" "to" "'" casting block in the .Dornbereich can be used. This results in more intensive cooling of the block cavity achieved in the mandrel area.

It is also advantageous if the mandrel ... "_" __ "_I. Can be rotated freely regarding the. Axis at an angle that corresponds to the distance between two adjacent grooves for sucking through the gas-water mixture corresponds, whereby a uniform cooling over the entire cross section of the mandrel is guaranteed.

In the following, the ~ "7". Γ - "- .: Invention using an exemplary embodiment explained in more detail with reference to the drawing. Show it

Fig. 1 is an overall view ^de . ^r "Vprrich-409839/0493 according to the invention

tung "~"

in longitudinal section,

Fig. 2 is a view along line II - II of Fig.I.

A device is proposed for generating the inner cylindrical cavity of the continuous casting block, which can be used in continuous casting systems for metals and alloys. This device is designed as a rod-shaped metal mandrel 1 (Fig.l), which is fastened at one end coaxially to the upper end face of the mold 2 by means of a bracket 5. The outer surface 4 of the dome I corresponds to the surface 5 of the inner cavity 6 .des """" to be cast block 7 and has on the. "Circumference " _ longitudinal openings 8 (Fig.2) for the passage of the coolant, which are at the unattached "end of the Domes I communicate with one another through a ring channel 9 (Fig.I). On the side of the attached end of the mandrel I there is a distributor 10 for the coolant supply, which unites the openings 8 for the passage of the coolant around an opening, and a distributor 11 for the coolant discharge, which combines the other openings 8.

Within the mandrel 1 along its axis, a central channel 12 (FIG. 2) goes through, where a device for the coolant supply to the inner cavity 6 of the continuous casting block 7 is housed, which has the shape of a tube 15 with openings 14, what about the coolant dem. . . Inner cavity 6 behind the mandrel I. in the direction of movement of the one pulled out by the approach bolt 1 £

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Continuous casting block 7 is supplied. The outer surface 4 of the dor- '

nes I is .. "" '....- .with longitudinal grooves 16 (Fig. 2) in the area

where the strength of the block 7 to be poured onto the surface 5 of the inner cavity 6 of the "'during the cooling resulting metal crust 17 (Fig.I) the deflection derselhen in the "longitudinal grooves 16 can prevent.

Each groove is connected to the central channel 12 via an opening 18

the/

(Fig. 2) connected and used for sanging the gas-water mixture, behind the mandrel in the direction of movement of the continuous casting block when the coolant is supplied to the inner cavity 6 of the Continuous casting block 7 is formed, which is intense and uniform Cooling of the block inner cavity guaranteed,

The outer surface of the mandrel I also has _ ~ Longitudinal grooves 19 between the "" "* _" longitudinal grooves 16, which for

^; Sucking through the gas-water mixture are intended. Each longitudinal run / '-

groove 19 is at the same level as the opening 8 for passage of the coolant and is connected to it via openings 20, around the coolant supply from the openings 8 to the / inner cavity 6 of the continuous casting block 7 ini area of the mandrel I to enable...

The gap 21 _ ^ 7 ΓΖ.7Γ ^Ζϊϊ ί ^{30ηβ; η} · the pipe 13 and the inner surface of the central channel 12 is used to divert the gas-water mixture that occurs when the continuous cast block 7 is cooled by means of a vacuum pump connected to the channel 12 (in Fig . Not shown).

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To ensure even cooling of the inner cavity of the continuous casting block To achieve this, the mandrel is given a retrograde rotation given at an angle that corresponds to the distance between two adjacent grooves.-16, causing the coolant one after the other gets to any point on the surface of the inner cavity.

The proposed device works as follows:

The liquid metal fed to the starting bolt 15 ″ fills the cavity between the mold 2 and the starting bolt 1 $ and moves along with the latter in the longitudinal direction opposite of the device for producing the inner cylindrical cavity of the Stratig cast block

The mandrel with the mold is given a reverse rotary motion. Upon contact with the outer surface of the mandrel 1, the liquid metal crystallizes and forms a gradually growing crust 17 which, after the strand is pulled out through the starting bolt 15, reaches the area of the hats 19, where it is sprayed with coolant through the openings 20. The resulting gas-water mixture is sucked through the openings on the mandrel I __'_ " as a result of the tension generated by the vacuum pump and from there via ITuten 16 and local recesses between the mandrel I and the crust 17, formed by the deformation of the same, and diverted via the openings 18 through the central channel 12 and passed into the air "."

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- ο -

Influences 14 supplied coolant, what the faster growth of the crust on the surface 5 of the inner cavity 6 caused by continuous casting block 7.

The resulting gas-water mixture is over the Fu-.ten 16 and local recesses between the mandrel and the crust 17 and through the openings 18 'and the central channel 12 in the Air diverted.

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Claims (2)

P 4? 108/2 _ 9 - March 19, 1975 BK / Br PATBMillTSPAÜCHE: 1. Device for generating the inner cylindrical cavity of continuous casting block in the continuous casting plant for metals, designed as a rod-shaped metal mandrel, the outer surface of which is the inner cavity. "VomStranggußbloek corresponds to and which is provided on the" circumference ""'" with communicating openings for the coolant to pass into a central channel, Inner / "* in its along d§r axis a device for coolant feed to the inner cavity of the continuous casting block behind the mandrel is attached in the direction of movement of the continuous casting block, while the clearance between this gate direction and the channel inner surface serves to remove the gas-water mixture produced when the continuously cast ingot is cooled. indicate / indicate that the Born (1) on its outer surface (4) by doing/
Longitudinal grooves (16) _ ... area where the strength , the metal crust formed in the inner cavity of the '"__ Stranggußblockes (7) preventing its bending to a hat (16) each hat (16) with a central channel (12) through Gff- a/
Connections (14) and intended for sucking through the gas-water mixture formed behind the mandrel (I) when the coolant is supplied to the inner cavity (6) of the continuous casting block (7), in order to ensure intensive and uniform cooling of the inner cavity of the continuous casting blockof. 2. Gate direction according to claim 1, characterized ei ^ chnet that between the. Longitudinal grooves (16) of the 409839/0493 - ίο - Domes over its outer surface (4) "longitudinal grooves ^ (19) for {jait den) Suction of the gas-water mixture are provided, the ^ uff- » Connections (18) for the passage of the coolant and for the/ the coolant supply from openings (14) to the inner cavity (16) ' of the continuous casting block (7) in the area of the mandrel (I). 5 device according to claim I, characterized in that - t & er thorn (O denotes that ~~ V ~~ reversible with respect to the axis is designed at an angle that corresponds to the distance between two adjacent grooves (16) for sucking the gas through -Water mixture, which achieves uniform cooling over the entire cross-section of the mandrel 409839/0493