DE1558297B1 - Device for uninterrupted loading of a rotary continuous casting device, as well as operating methods for this - Google Patents

Description

2. Device according to claim 1, characterized in that the mirror was provided. Further examples of stationary labels, that the nozzles (4, 4 ') are tangential rer continuous casting in the Austrian with respect to the point of impact (2, 2 ') patent 231 630 and in the USA patent extending circle (6) are arranged. 2,732,601 shown.

3. Device according to claims 1 and 2, the other also rotating Stranggießverdadurch are in that two holding furnaces 20 proceedings, in particular centrifugal beöfen (7, T) are provided, where each known a gutter, in which the melt in a vertical, (8, 8 a, 8 ', 8'fl) is assigned, which is fed via nozzles rotating mold and the cast strand is formed (4, 4 a, 4', 4'α) with continuous casting molds (1, la) are also continuously connected downwards. is deducted. Examples of such rotating strand

4. Device according to claims 1 to 3, 25 casting method are in the mentioned "manual of the characterized in that at the end of each continuous casting" on p. 274, pictures 903 to 905, and channel (8, 8a, 8 ', 8' a) a tundish (9, i of USA. Patent 3268 959 _n shown. As far as 9a, is provided 9 ', 9'a). such rotary continuous casting processes for manufacture

5. Device according to one of the preceding. of hollow continuously cast bodies, especially pipes, the claims that the nozzles (4, 4 ') serve diametrically 30 can be inside the rotating mold opposite. an inner dome may be provided, which may be

6. Method of operating the device at the same time as a rolling tool for processing the according to one of the preceding claims 3 inner wall of the continuously cast body used to 5, characterized in that the can be from the.

Both holding furnaces (7, T) emerging 35 In continuous casting processes of this type, the same quantities of melt are fed into the channels (8, there is a problem with regard to guaranteeing 8 a) via intermediate pans, with real continuity of the casting process via a respective holding furnace (7, T) at the same time for a longer period of time in the sense that feeds both continuous casting molds without. Interruption and change of the casting conditions

7. Method for operating the device 4 ° over the said longer period of time according to one of the preceding claims 3 continuous castings of consistently high quality erbis 5, characterized in that the melt will hold. The need for interruption devices of a deflecting element from a warming of the casting process resulted on the one hand from the holding furnace either to one (1) or to the limited capacity of the for the supply of the melt whose continuous casting mold (Ια) is passed, with 45 from the melting furnaces to which the mold is fed Simultaneous loading of the two strands - the nozzles used ladles and casting molds constantly from intermediate containers assigned to one of the holding cases, as well as from oven takes place. the highly erosive effect of the hot melt

on the linings of the ver-50 turned gutters, intermediate containers and nozzles so-

such as sealing plugs and the like; which caused it

heavy wear especially the heavily used Parts of the feeding device such as the gutters and

The invention relates to a device for the melt supply nozzles causing frequent peri-interruption-free Loading a rotary casting machine with a vertical, rotating part or its refractory lining. Every able continuous casting mold and with several successive interruptions caused by the above factors Loading devices for this chung affects the economy of the Versowie an operating method for such driving, since the casting process then with a sending device. 60 special start-up line to be initiated again

Continuous continuous casting process for the production must and also the first cast strand piece, development of continuously cast bodies of various types, with which comes immediately after the start-up strand, soollem or hollow cross-section and of round or, like the last piece, the pouring head, not of any other use Cross-sectional shapes are known per se. are real waste. In addition to considerable

On the one hand, static continuous strand losses are also material losses, casting process known in which the strand in To remedy these difficulties and a

a stationary mold from the extensive continuity of the casting process to ensure the desired shape of the cast strand, multiple arrangements have already been made

3 4

Gen of a continuous casting mold associated casting process equal, since the relevant

Sending devices are provided, which segregated sections of the cast strand as waste on one another

the following must be the supply of the mold with the melt,

take over. The same goes for those from the also already

US Pat. No. 2,732,601 mentioned from the aforementioned Austrian patent specification 5 231 630 is a multiple loading device method in connection with this for the fully continuous continuous casting of metals, with a stationary continuous casting mold. With this leg in particular known from steel, in which the liquid known device is a variety of casting metal one after the other from at least two containers pans in a circuit along a rail guide Via intermediate containers and their spout or through a series of successive stations such as Spouts are passed into the mold, with out before follows: From a burner station, in which when the first container becomes empty, at least the empty pouring ladle or its pouring spout becomes part of it leading to an emergency pan collecting device is burned free of slag residues, too under the spout of a pouring ladle preheating station, then to the second container arranged intermediate container is performed, then the 15 of a station in which the ladle with a second intermediate container is filled and then new, reconditioned sealing plugs are provided, with its collecting device over the mold goes from there to one aligned with the melting furnace is rotated, whereupon the collecting device from the station in which the ladle with the melt The spout is withdrawn and the pouring stream is fed to the mold, then to a station in which is released, and at the same time the 20 the ladle with a new, reprocessed nozzle first intermediate container associated collecting is provided, and then in the position above the direction under the spout of the first intermediate casting mold, and from there after emptying into a holder is brought to its pouring stream in the station in which the worn nozzle and the To guide emergency ladle, whereupon the first interim worn sealing plug from the ladle container removed together with its collecting device 25 and the above-mentioned processing stavon the mold is turned away, this turning for later re-use after the in-motion be synchronized so that the maintenance is supplied. This cycle will Melt supply to the mold is practically not continuously continuous. Also takes place here is broken. This configuration of loading during the transition of the loading from one Dispensing device and the operating method 3 ° ladle to the next one in part progressoll can be achieved that despite limited capacity sive and erratic in the actual switchover point the ladles and intermediate containers not only relocate what is flowing into the mold a practically uninterrupted feeding of the pouring stream and its point of impact on the Mold is guaranteed with the melt, but melt level instead. So the same changes are also the at the beginning after the opening of the outflows of the casting conditions and the atomized thereby A newly filled ladle emerging caused inhomogeneities in the continuously cast body still undercooled and possibly connected by slag, which lead to scrap and, from contaminated melt as well as towards the end of the product, the continuity of the Gießverder Actually interrupt the emptying of a ladle.

slag-rich melt not drawn into the mold- 4 ° The invention is therefore based on the object

will lead. in conjunction with a continuous rotating

Apart from a complicated, costly continuous casting process, a charging of the mold to build up, this known device has the basic disadvantage over an arbitrarily long period of time that in the course of the excess space runs fully continuously and at the same time a line of the charging from an intermediate container 45 constant, free from any discontinuities on the other, first of all, the Entlee quality of the continuously cast body is guaranteed,
For this purpose, according to the invention, in Ver-Gießstrahl together with the intermediate container bond with a rotating continuous casting mold is moved pre-progressively over the casting mold in order to see that the loading devices with the full intermediate container that is moving upwards space to 50 their nozzles rotationally symmetrically so over make the, and that after switching to the full continuous casting mold are arranged that the character of this casting container and the teristics of the rays emerging from it at the point of impact are the same. Pouring stream also successively up to the middle position. According to an expedient embodiment, the mold can be shifted, and it can also be provided that the nozzles tangentially at the time of the actual switchover cause a sudden shift of the pouring stream with respect to the point of impact Are arranged in a circle,
and its point of impact on the melting mirror. According to the invention, taking place in connection with one. rotating continuous casting mold the loading

This extends over all of the transfer lines and in particular the melt feed nozzles

The corresponding period of time extending to 60 is rotationally symmetrical with respect to the continuous casting mold

Partly progressive, partly abrupt shifts and are preferably arranged in such a way that the

of the pouring stream and its point of impact on the point of impact of the melt jets on one and the other

Melt level in the stationary casting mold is the same so-called »charging circuit« (referenced

if there are inevitable changes in the load on the mold center and pivot point), will

Delivery conditions, based on the melt 65, ensure that despite the stationary arrangement of the

mirror, and the resulting uneven loading devices at different spatial

opportunities and inhomogeneities in the continuously cast body, the borrowed points at the transition of the loading of

in the effect of interrupting the continuous flow of one feeder to the other

5 6

the beam characteristics at the point of impact and the angular position of the point of impact 2 with respect to so that the casting conditions practically unchanged the continuous casting mold indifferent, so that the remain. With the invention, the same conditions are applied to a

like device effort (the loading device - any point one through the point of impact 2

lines can be stationary and immovable and can take place in a 5 running circle 6, the center of which

such mutual arrangement be appropriate, point together with the axis of the continuous casting mold.

that there is no handicap or lack of space even with Anmen, who is referred to as the »loading circle«

Order of more than two loading devices can be done.

gene arises over the mold) ensures that according to the invention there are two charging processes the casting quality essential casting conditions io used directions that are similar to one another formed during the transition from one to the other loading, but in the embodiment according to dispatch device remain unchanged. F i g. 1 offset by 180 ° with respect to the mold axis

According to appropriate embodiments of the invention are. There is therefore a second point of impact 2 ' dung can be provided 'that two holding ovens in which one of a refractory part 4' is provided are, each of which is assigned a channel, 15 tender second melt jet 3 'the top of one which are connected to the continuous casting molds via nozzles and which are produced in the mold, at the end of each channel there is an intermediate blow.

pan can be provided. According to the invention, the nozzles can be

such a dual arrangement, preferably following at 2 and 2 ', the change

be arranged diametrically opposite. 20 is made at least every time

The invention also relates to an operating method of one of the loading devices because of a loading

for such a dual loader, damage or normal wear and tear

of the aforementioned type of refractory material to be repaired

According to an expedient operating procedure, the must.

be provided that the two warming 25 As can be seen, it comes under these circumstances

The same quantities of melt escaping from the furnace as a result of charging under the same conditions

Gutters is passed over intermediate pans, with melt jets, which successively in the

each one .. holding furnace at the same time both strand impact points 2 and 2 'are fed to no-

feeds casting molds. no noteworthy disruption of the continuous

Alternatively it can be provided that the melt 30 casting process; the inventive loading means of a deflecting element from a warming device enables the fully continuous furnace to be directed either to one or the other strand of extremely large quantities of casting mold, with the simultaneous loading of steel from the continuous casting mold 1 without the two being fed in Continuous casting molds constantly from the running process of the continuous casting process, which, as he does in a holding furnace, takes place. 35 believes that this is a delicate phase in the implementation of the. ·. In the following, exemplary embodiments of the continuous casting are represented, repeatedly described anew-invention with reference to the drawing; must be directed in.
this shows If necessary, the continuous casting

F i g. 1 in a schematic representation of a top mold 1 around more than two loading devices

view of a device according to the invention for contractions are provided; however, this is generally

continuous feed, do not mean necessary, as the life of a

F i g. Figure 2 is a perspective, also schematic, loading device generally essential

sized view of the in F i g. 1 is larger than the one for repairing the others

contraption, . Loading device is required time.

F i g. 3 in a schematic representation a top view. 3 shows a schematic plan view of a feeding device provided on a plant of two parallel-connected, improved embodiment of a continuous casting mold according to the invention with a common feed. 3 again shows a casting mold or embodiment of the invention rotating in the direction of arrow F through a loading device. Mold 1, to which two loading devices

In Figs. 1 and 2 a cooled rotary 50 is arranged, by means of which successively Continuous casting mold 1 shown by not dar- melt jets 3 and 3 ', which are made of refractory cast any means of rotation in the direction snout or nozzles 4 and 4 'emerge into the of arrow F is driven. Impact points 2 and 2 'can be supplied.

This mold can be used in a known manner to manufacture the plant in Fig. 3 also has a second position of full round material, 55 continuous casting mold la , which does not rotate in the direction of arrow F at the lower end of the mold with the help of and the is also withdrawn accordingly with two organs shown, wherein the melt jets of liquid metal 3 α and 3'a can be sent to the supply of the melt jet in a fixed point 2, which happens from refractory casting, which snout near the wall of the mold or nozzles 4 is to be a fed and 4'α, ₃ of the hit in the example shown at about ^2/60 and in Auftreffpunkten2a and 2'a on.
Mold radius lies. The refractory nozzles 4 and 4 a are both

As can be seen from the drawing, the is supplied from a holding furnace 7 at the same time,

a refractory pouring spout or nozzle 4 from which melt flows simultaneously into the pouring spout

tend melt jet 3 essentially along a NEN 8 and 8 a, which lead to intermediate pans 9 and 9 a

lead to the refractory material through the point of impact 2 and the axis 5 65, which is a regulation

the continuous casting mold running radius perpendicular to the discharge amount of the melt by means of a

directed direction. Stopper allow closable opening.

In the method described above, Um is that coming from the holding furnace 7

To distribute melt to the channels 8 and 8 α, a distributor arrangement can be provided in a manner known per se, into which the melt coming from the furnace 7 flows and which at its lower part has two openings of the same diameter for supplying the channels 8 and 8 α is provided.

The holding furnace 7 only has the task of receiving a certain amount of melt that is fed to it with a precisely defined composition and temperature, and this melt during the time necessary to distribute the melt on the continuously operating casting devices To keep time under the same conditions; in other words, the holding furnace is used essentially the purpose of providing and compensating for heat losses.

The holding furnace is periodically replaced by a ladle with steel from a production unit fed.

The in F i g. The device shown in FIG. 3 is equipped with a further holding furnace 7 ', which accordingly supplies refractory pouring nozzles or nozzles 4' and 4'a via channels 8 'and 8'a and intermediate pans 9' and 9'a ; this second loading device is of the same type as that previously described.

According to the invention, the feed of the continuous casting molds 1 and la is carried out with melt during a first time from the oven 7 from, wherein the metal / flows toward the fully drawn line arrows. If the charging device connected to the furnace 7 has been damaged by the circulation of the melt, the continuous casting molds 1 and la are fed from the furnace 7 ', the metal flowing in the direction of the dashed arrows /', in such a way that the with the Furnace 7 connected loading device meanwhile can be repaired without difficulty.

In this way, the two rotary continuous casting molds are fed really continuously guaranteed under optimal conditions.

According to a variant of the in FIG. 3, a distribution or deflection element can be provided at the outlet of each of the furnaces 7 and 7 ', in which case, during a first period of time, the melt from furnace 7 is only channel 8 and the melt from furnace 7' is only channel 8 'a is supplied, whereby on the one hand the ongoing charging of the two molds 1 and 1 α is ensured and at the same time the repair of the channels 8' and 8 α is made possible. Then α can the melt in the channels 8 and are directed 8 'by a corresponding switching of the distribution or deflection members, so that during which the other feed grooves 8'a and 8 repaired without interrupting the continuous casting can ground v /.

According to an alternative embodiment, instead of using a distribution or deflection element at the outlet of the ovens 7 and 7 ', the channels 8, 8 a, 8' and 8'a can be designed to be pivotable about the loading point from the ovens 7 and T , so that the Melt flow only flows into one or the other of the channels mentioned.

1 sheet of COPY drawings

209 511/207

Claims (1)

1 2 Mold is poured and continuously drawn downwards. Examples of such stationary strand casting methods and devices for this are about 1. Device for uninterrupted loading in "Manual of Continuous Casting" by Herrmann send a rotary continuous caster 5 on p. 336, Fig. 1144 and 1145, as well as on p. 332, with a vertical, rotatable continuous casting mold Fig. 1121 to 1124, described. It is in this- and also already known with several successive Bees contexts, the Dispensing devices for this, thereby melt jet at an eccentric point of the characterized in that the feed melt level is at the top of the in formation devices with their nozzles (4, 4 ') to supply rotationally located continuous cast bodies, with symmetrically arranged over the continuous casting mold (1) also to achieve a better casting quality are that the characteristics of the already a relative movement of the tundish with Jets (3, 3 ') at the point of impact (2, 2') equal to the melt feed nozzle opposite the stationary one are. Mold and the melt located in it