DE1583696C

DE1583696C - Use of solid steel to accelerate the solidification of liquid steel

Info

Publication number: DE1583696C
Authority: DE
Inventors: Jean Liege; Kuunen Nicolas Ougree; Chaussee (Belgien)
Original assignee: Societe Anonyme Metallurgique d'Esperance-Longdoz, Lüttich (Belgien)
Publication date: 1973-12-20

Description

begrenzen. Eine derart kurze Berieselungsdauer ist im allgemeinen ohne Einfluß auf die Kokillenhaltbarkeit. limit. Such a short sprinkling time generally has no effect on the durability of the mold.

Weiterhin konnte festgestellt werden, daß die Verfestigung des oberen Blockabschnittes in allen Fällen völlig zuverlässig und endgültig in weniger als einer Minute nach der Schrottzugabe erreicht wurde, gleichgültig, welche Zeit nach dem Ende des Blockgusses vergangen ist, wie die Blockabmessungen sind, wie der Kopf aussieht, wie stark die Kochintensität und wie die Zusammensetzung des Stahles ist.Furthermore, it was found that the solidification of the upper block section in all cases completely reliable and finally achieved in less than a minute after the scrap addition, no matter what time has passed after the end of the ingot casting, what the ingot dimensions are, what the head looks like, how intense the cooking intensity is and what the composition of the steel is.

Zu den besonderen Vorteilen des erfindungsgemäßen Verfahrens zählt darüber hinaus, daß es nicht zu den durch die Menge der nicht metallischen Einschlüsse im Fertigerzeugnis bedingten Einflüsse kommt, daß unter dem Gesichtspunkt der Begrenzung der Steigerungen sowie einer Verbesserung des metallischen Ausbringens beim Walzen eine optimale Wirksamkeit gegeben ist, die Haltbarkeitssteigerung für die Blockkokillen und die niedrigen Herstellungskosten, da sich ja der verwendete Schrott vollständig als Schnittabfall an der Walzgutspitze wiederfindet. Darüber hinaus sei darauf hingewiesen, daß das Erzeugnis zu keinerlei schädlicher Verunreinigung desOne of the particular advantages of the process according to the invention is that it does not the influences caused by the amount of non-metallic inclusions in the finished product comes that from the point of view of limiting the increases as well as improving the Metallic output during rolling is optimally effective, increasing the durability for the block molds and the low production costs, since the scrap used is completely found as cutting waste at the tip of the rolling stock. It should also be noted that the product to no harmful contamination of the

ίο Tiefofens führt.ίο soaking furnace leads.

Zum Einbringen einer einzigen Schrottladung in die Anordnung am oberen Ende des Blockes empfiehlt sich die Verwendung eines an sich bekannten Schrottkorbes mit einer aufklappbaren Bodenöffnung. Recommended for introducing a single scrap load into the arrangement at the top of the block the use of a known scrap basket with a hinged bottom opening.

Claims

1 2 The invention is based on the object of the claims: Use of solid steel to accelerate the solidification of the upper end of the block, as mentioned in the introduction

1. Use of solid steel to accelerate specified to train in such a way that the ability the solidification of the upper end of the block at 5 desired solidification of the upper section of the calmed, traded ingot cast in ingot molds results without affecting steel, whereby the liquid steel by introducing the mold durability or else the Gen of solid steel can come into the upper end of the block working conditions in the casting hall. Heat is withdrawn, thereby marked This is achieved according to the invention in that as shows that as solid steel, solid steel, intertwined steel scrap penetrated Steel scrap is used in which is brought in at least one dimension at least one dimension is significantly larger than significantly larger than the other two. Preferred the other two is. wise, steel scrap becomes essentially the same

2. Use according to claim 1, characterized in that the steel used in the block is used by indicates that the steel scrap is essentially 15 flat and elongated shape.

chcn of the same kind as the steel of the block

is. , upper liquid block section introduced in this way

3. Use according to claims 1 and 2, accumulation of light scrap in that they interlock characterized in that the scrap penetrates from fla-, a wide-meshed network of large rather as well as elongated shape. 20 cooling force into which the metal

4. Use according to claims 1 to 3, gene penetrate and quickly in a thick layer characterized in that the scrap can solidify from. It has also been shown that Sheet metal waste is created when trimming the bringing in of aluminum or another The edges of hot-rolled sheet metal are created and deoxidizer is no longer required, incurred when picking. . 25 regardless of the circumstances.

Bulky types of scrap can be particularly advantageous used when trimming sheet metal edges, which is usually done at Zurich

processing of the rolled hot strip and the decap

30 tion takes place. These edge waste pieces are preferably in pieces of lengths below 200 mm and above 50 mm in front, while their width mostly

The invention relates to the use in the range of 5 and 15 mm and its thickness of 1.5 of solid steel to accelerate the solidification is up to 5 mm, as it is through the cutting lines when of the upper end of the block with unsteady, in block 35 picking are conditional. This junk, yes Chilled steel to be cast, removing any impurities from the liquid as a result of the pickling Steel that has been kept away by the penetration of solid steel into the upper part can, if necessary, correspond to the end of the block Heat is withdrawn. sorted according to its origin so that its

According to the German Auslegeschrift 1 201 515, it is the composition of those to be treated known to approach the upper part of the block head from 40 blocks.

roaring, unquenched steels through the addition of scrap to the upper block

Block head to cool abandoned coolant; the cut can be done in any way, e.g. Coolants can evaporate or by hand or with the help of any kind of conveying pre-thermal Decomposition binds heat. You know the direction, but it is beneficial to do so as soon as also according to the German patent specification 168 572 the 45 possible to carry out if the treatment Use of a bar made from the same type or from one tonne block weight of the required scrap value of higher value Metal for cooling should be reduced by in a crowd.

Chill solidifying steel, said after adding the scrap to the top

Rod is inserted into the liquid steel. Dane block section can ben a light sprinkling of water, further means are known to extract heat from the block head 50 during the solidification in order to solidify the metal surface, such as, which solidifies in connection with the scrap,
z. B. a water sprinkling and / or throwing up The inventive method offers above all

a mixture of aluminum and steel scrap very much in that embodiment in which from small dimensions on the block end. As a result, the scrap generated by the edge waste but if there is an increase in inclusions 55 use is made, especially interesting Vorim Block, so that it no longer divides unrestrictedly.

for the production of deep-drawable sheets

is suitable. of the scrap to a wide-meshed network on the one hand

With none of the known means is guaranteed to reduce consumption, while on the other hand the that in each case immediately or in the required upper area of the partially in the upper block possible Deadline is the accelerated and complete cutting of sunk, jammed scrap Rigidity of the upper portion of the treated is the maximum of its effectiveness on the Beriese block reached and the boiling is finally interrupted.

that will. In particular, a strong, extensive The sprinkling can be used in its execution

Sprinkling with water disadvantageous for the Kokil- 65 without disadvantages for the block for a period of 3 durability; in addition, the violent up to 5 minutes, calculated from the end of the application Steam and mist development work in that of the scrap, as well as to a maximum of Makes the casting hall heavy and exhausting. 3 liters of water per minute and ton block weight