LU83377A1 - METHOD FOR COOLING THE STRAND SURFACE OF A CASTING STRAND - Google Patents

Description

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The invention relates to a method for cooling the strand surface of a casting strand by means of a continuous casting roller having a porous surface layer and a continuous casting roller for continuous

Execution of the procedure.

Continuous casting rolls with a porous sintered jacket layer and an internal cooling system are known

Is connected to the jacket layer so that the coolant can escape from the roll surface. This allows both the roll itself and the strand surface to be cooled.

However, the production of these rolls is very complex.

The object of the invention is therefore to provide a method for cooling the strand surface by means of a continuous casting roller, which does not require an internal cooling system.

To achieve this object, it is proposed according to the invention that the cooling medium be introduced from the outside into the region of the roll surface layer facing away from the strand during the rotation of the roll

I and when this roll area comes into contact with or comes into contact with the strand again.

| The role that can be used to carry out the procedure! has a roller core to which a porous sintered layer is applied. The thickness range of the sintered layer must have sufficient absorption of the cooling layer. - 4 - jj 1 'i, - 4 - mediums, whereby the amount of cooling medium to be absorbed by the porous layer must also be so large that the radiation energy incident on the roll is absorbed by the cooling medium without the roll e.g. of water as the cooling medium becomes hotter than 110 ° and cooling of the strand is also possible.

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In order to achieve this, it is provided that, in the case of a roll with a diameter of approximately 400 mm, the layer thickness of the pnnous sintered layer is greater than 10 mm and has an open porosity of approximately 24%. The cooling capacity of such a roll is then about 10 1 per minute.

The cooling liquid can be introduced into the surface layer, for example, by immersing the roll in the cooling liquid on the side facing away from the strand and soaking it up. As the roll rotates further and this surface area approaches the strand or when it comes into contact with the strand, the cooling medium is released and it absorbs the radiation energy hitting the roll.

This ensures not only the cooling of the roll but also the cooling of the strand.

An otherwise usual secondary cooling can then be dispensed with.

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Claims (2)

1. A method for cooling the strand surface of a casting strand by means of a continuous casting roller having a porous surface layer, characterized in that the cooling medium during the rotating of the roller from the outside into those facing away from the strand! The area of the roll surface layer is introduced and is released again when the roll area approaches or comes into contact with or with the strand. / - 2 -: // - p /? : i P »S; · ^ I i}! ; · «- 2 - t 2. Continuous casting roll for carrying out the method according to claim 1, consisting of a roll core and a porous surface sinter layer, characterized in that the roll has a porous surface layer thickness of greater than 10 mm with an open porosity of about 24% with a diameter of about 400 mm. KLkjjti t - t - 3 -