DE2248052C2 - Casting device for casting liquid metal or metal alloys with a melting or holding furnace and an electromagnetic conveyor chute - Google Patents

Description

55

The invention relates to a casting device for casting liquid metals or metal alloys with a melting or holding furnace and an electromagnetic furnace connected to its furnace vessel Conveyor trough, which has a refractory, sloping trough body as well as a has along this extending electromagnetic traveling field inductor.

Devices of this type are z. B. from German patents 1286 701 and 1783 044 known. In these devices, the liquid melt is under the action of an electromagnetic Moving field from the furnace vessel in the sloping channel body against the effect The force of gravity is conveyed upwards in an open flow and from the upper end of the channel into the casting molded in shape. Among other things, one of the degree of filling of the furnace vessel largely independent, precise metering of the portion to be cast To achieve melt, the winding of the traveling field inductor is divided into a continuously switched on Te ^ arranged in the area of the lower part of the channel winding, the action of which feeds the melt up to a predetermined point along the channel is, and in a only to be switched on during the casting process for a predetermined period of time, Induktorteilwickluru> located at the upper end of the channel. With these known devices, a good metering accuracy is achieved.

In casting devices of this type, however, occurs increasingly as the washout progresses or soiling of the lining det the pouring spout at the upper end of the channel - often a Remains of the melt dripping through. Irregularities in the lining surface only slowly flow away when braked. For many purposes, e.g. B. for small casting frequencies who can wait for the end of dripping, this phenomenon is often not disturbing. Should however z. B. a casting machine, for example a casting wheel or casting belt with the help of the casting device are fed with a relatively high casting frequency for a relatively small casting weight, this has an effect Disadvantage very annoying.

The invention is based on the object of providing a casting device with a melting and or Holding furnace as well as with an electromagnetic conveyor chute connected to its furnace vessel to specify the casting of liquid metals or metal alloys in which a dripping of Remains of the melt from the pouring opening at the upper end of the channel after the pouring process has ended is practically completely avoided and with the moreover one compared to known devices even higher dosing accuracy can be achieved during casting.

This object is achieved in the inventive pouring device, which is characterized in that the refractory channel body at its upper end a wall running transversely to the channel extension. which completes the effective clear profile of the gutter channel and that in the vicinity of this end wall a refractory pouring pipe reaching through the channel bottom is arranged, which protrudes with its upper end over the adjacent bottom of the channel channel and its length is sufficient is chosen large that the melt flows out at its lower end in a closed jet. It is when the traveling field inductor is in a known manner under the refractory channel body is arranged, the sole of the gutter channel formed so that it is between the point of upper end of the traveling field inductor and the end wall in the direction of the latter to even further rises obliquely.

In an advantageous embodiment of the invention, the casting device is characterized by a the channel bottom traversing the channel that receives the pouring pipe, which is at the upper end of the

Channel is connected to it. The pouring pipe is advantageously connected to a sleeve made of refractory material, which in turn is glued to the upper end of the channel and its upper edge is as high as or higher than the adjacent bottom of the channel. The wall of the channel can advantageously in the region below the cuff by a refractory tube overall, it a r-ipRrnhr 16 largely avoided nenboden 15 and tneur ^onr * _b ^ _Manschettc be 22nd In the area of the ramming mass of the

is the channel wall Uurcn l _{feuerfestcs stirring 24} channel bottom 15 ^ g "-" * ^ · _ManschellL. formed, on its upper un- _p ^. ^

22 is supported. Close im, _bj , _de ° _{that between} _

borrowed, the _c ^Rl " ^ne " ^k ° ^ i ^ n _end ts of the traveling field vision of the point 25 des, ooere ^ ^ ^^ _JJ .

^d Ä on the partition wall

^ Fig.! shows the inventive pouring device schematically in longitudinal section, while in Fig. 2 that 1-cile of the device which the inventive Features concern, shown enlarged in detail

^S1 The one with a »corner rested on a base 1 (Fig. 1). 2 closed furnace vessel 3 (Fig. 1 nu ^ / um part shown), to which the side of the refractory, inclined trough body 4 of an elekuoma- • people conveyor trough connects. The inductor 6 for generating an electromagnetic traveling field is arranged below the channel body 4, which is provided with a channel cover 5, the winding of which is a lower first partial winding? and an adjoining second partial winding 8 reaching up to the vicinity of the upper end of the channel, the connections 9 for the winding at the junction of both partial windings

SrbmUdSS success, well

^au "?! f ⁿ ^ ° ^ f! ' Operation is the lower part while the whole »" π " _stands the one-

x ₅ winding 7 of the wall crfe ^ ndukto «^^« ^

^^^^ s _c hmd / = from the furnace vessel 3 in the channel up to each π er S te 1 le ^ or - ^ ner ic / wutt

Partial winding 8 ^^^^^^^^^^^^^^^^^^^^^^^^^ Vary layer 26 of the bcnmu «... _di " _{em fabric}

heated by 4 and because they are in ι. s _? ^ exchange with the batch n β

det, not recognized either: J " ¹ " - ¹ ; _{now through / u}

The individual oitb process

»5 switch the upper second part» to mn. Operating voltage introduced through the Vt Change the melt on to the J £ ^

is promoted and from the, uie: _{other fcllI} .

Thereby w.rd de from ^! "^" Va Hie FcfderletstunJ the strength set so high that ^^ [f ™ ^ ^

■ Α on the last inductor polarity on The upper end of the channel is the bottom 11 of the channel channel angled to the horizontal, while the channel body 4 at its upper end by a the bridge 12 connecting the channel side walls is covered from rammed earth, which is one of a boxy Ceiling, 13 closed opening

Sr refractory channel body 4 now has - in In contrast to the well-known electromagnetic conveyor troughs for the metered pouring of melts - At its upper end a wall 14 running transversely to the channel extension, which the clear profile of the gutter channel closes and in the vicinity of a through the gutter bottom 15 reaching refractory pouring pipe 16 is arranged. The casting device is used, for example, to feed casting molds 17. the on one in F i g. 1 with 18 indicated casting belt of the device are supplied.

The area of the device with the pouring pipe 16 and, indicated approximately by the circle 19 in FIG End wall 14 is shown enlarged in Fig.

The pouring pipe 16, the upper end 20 of which protrudes beyond the adjacent bottom 11 'of the channel channel, is connected to a sleeve 22. Pouring pipe 16 and sleeve 22 are arranged in a channel 23 which traverses the channel bottom 15, the upper edge of the sleeve being approximately at the same height as the adjacent bottom 11 'of the channel channel. They are only at the upper end of the channel 23 with countries gutter bottom 15, for example by Klcbung, vcrbundcn whereby thermal stresses between bovine SÄ P
can flow out. Under

now very quickly, ie in the ^a

after the start of the eating process ^ m

Melt layers whose ^ ¹

the line 28 is indicated and

s ^ huch riur v ^ dcrR. «« nlcju «ngjM-J · J * ·

the melt surface 28 over the upper end 20 of the pouring tube, 16 (see Pig -) remains de Meny. the per unit of time from the G cßr ^ohr " ³ ™ ^ ₍ the melt via the gn ^ n" part da G.cß / ut also practically cons on to restrict the casting process - controlled by a ^ eugne en / χι switch - the upper two., _{t Tt} ^ ₁ coil of the inductor switched off, after which the ^^ ubtrwit gene part of the ^{melt in the area ^^ 1} and more cloudy at the upper J ^m ^, chen melt - by de Schrag ^ ^d J ^{r Soh} ^ J | of the gutter channel accelerated - very quickly, * _1C dtr flows back into the furnace vessel 3 and thereby _dd s

regularities of the

pers 4 braked long

the top end ² ® _Έ ^^

adjacent sole 11 of R n | J

no longer lead to the melt dripping down the pouring tube 16.

The length of the pipe is, jcwc Is J on the type of melt, sufficient that the melt can be measured Closed jet flows out of the flow tube 16.

1 sheet of drawings

Claims (5)

2 052 claims: 1. Casting device for casting liquid metals or metal alloys with a Melting or holding furnace and an electromagnetic furnace connected to its furnace vessel Conveyor trough, which has a refractory, inclined »rising trough body and a has along this traveling electromagnetic traveling field inductor, characterized in that that the refractory channel body (4) at its upper end a transverse to Wall (14) which extends the channel and forms the effective clear profile of the channel channel closes, and that in the vicinity of this end wall (14) a through the channel bottom (15) through, the refractory pouring pipe (16) is arranged, which with its upper end (2Ö) over the adjacent floor (H ') of the channel channel protrudes and its length is chosen to be sufficiently large that the melt on his lower end flows out in a closed jet. 2. Casting device according to claim 1, characterized in that the electromagnetic Traveling field inductor (6) in a known manner under the refractory channel body (4) is arranged uiid that between the point (25) the upper end of the wall inductor (6) and the end wall (14) the sole (H ') of the Gutter channel in the direction of the end wall (14) continues to rise obliquely. 3. Pouring device according to claim 1 or 2, characterized by a channel bottom (15) traversing channel (23), which the casting roll (16) receives which at the upper end of the channel (23) is connected to this. 4. Pouring device according to claim 3, characterized in that the pouring tube (16) with a Cuff (22) made of refractory material is connected, in turn, in the upper end of the channel (23) is glued to this and its upper edge is the same as or higher than the adjacent bottom (H ') of the gutter channel lies. 5. Casting device according to claim 4, characterized in that the channel wall in the area is formed below the cuff (22) by a refractory tube (24) on its upper The end of the sleeve (22) is supported.