DE102009059998A1 - Steel plant comprises a processing area for melting steel scrap, and a material supply area for collecting and loading steel scrap in which an electrical melting furnace and an electrical crucible furnace are arranged - Google Patents

Abstract

The steel plant comprises a processing area (10) for melting steel scrap, and a material supply area (20) for collecting and loading steel scrap in which an electrical melting furnace (100) and an electrical crucible furnace (120) are arranged in a vertical top view manner in the processing area in such a way that the connection line passes diagonal to a first horizontal direction. An individual powerhouse (13) is arranged into the processing area in such a way that the connection line of the electrical melting furnace to the powerhouse passes vertically to the first horizontal direction. The steel plant comprises a processing area (10) for melting steel scrap, and a material supply area (20) for collecting and loading steel scrap in which an electrical melting furnace (100) and an electrical crucible furnace (120) are arranged in a vertical top view manner in the processing area in such a way that the connection line passes diagonal to a first horizontal direction. An individual powerhouse (13) is arranged into the processing area in such a way that the connection line of the electrical melting furnace to the powerhouse passes vertically to the first horizontal direction and the connection line of the powerhouse to the crucible furnace passes parallel to the first horizontal direction in which a first couple of scrap yards is arranged in a scrap yard arrangement direction next to each other and with a first scrap loading section between the scrap yards in the material supply area in the vertical top view manner and a second couple of scrap yards, which are arranged in the scrap yard arrangement direction next to each other and with a second scrap loading section between the scrap yards in such a way that the scrap loading section is aligned in a scrap transport direction, which is vertical to the scrap yard alignment direction. The processing area and the material supply area are relatively arranged to each other in such a way that an axis guides along the scrap transport direction by the scrap loading section over a charging area to the electrical melting furnace in the vertical top view manner. A continuous casting plant is arranged in the first horizontal direction next to the crucible furnace. A storage- and maintenance areas are arranged for the crucible furnace and the continuous casting plant in the first horizontal direction into the extension of the connection between the powerhouse and the crucible furnace.

Description

The invention relates to a steel mill and the arrangement of the steelwork components in the steelworks.

In steelworks, steel is either made from iron ore using blast furnaces and converters, or by smelting steel scrap. When smelting steel scrap, electric arc furnaces (so-called EAFs = Electric Arc Furnaces) are generally used.

The smelting of steel scrap is energetically more favorable than the production of steel from iron ore.

The liquid steel is further processed in the steelworks at least to the extent that it is transportable, d. H. it is fed to a casting plant such as a continuous casting plant. For this purpose, the molten steel from the EAF is poured into a pan (racking). Previously, it was common practice to perform the alloying and temperature adjustment entirely in the electric arc furnace (EAF). Today it is customary to carry out at least part of the alloy and the temperature adjustment in a ladle furnace before introduction into the casting plant.

Conventional steel mills arrange the smelting unit, ie the electric arc furnace, the ladle furnace and the continuous casting plant in a linear arrangement along a transport axis. In other conventional steelworks arrangements, the smelting aggregate, i. H. the electric arc furnace, the ladle furnace and the continuous casting plant are arranged in separate halls. Both conventional concepts usually require separate control stations / maintenance for the smelting unit, the ladle furnace and the continuous casting plant.

In a conventional steel mill, in which steel scrap is melted down, the melted material is transported from a material supply area, ie a scrap collecting and loading area, by means of scrap baskets and trolleys, on which the scrap baskets are transported, to the smelting unit.

The conventional steelworks arrangements require a large area on which the processing area with melting and continuous casting and the material supply area with scrap collecting and loading area and the necessary transport paths are arranged.

Object of the present invention is to provide an improved steelworks or an improved arrangement of the individual components in a steel mill, in particular a steel mill, is melted in the steel scrap specify.

This object is achieved by a steel mill according to claim 1 or 4 or 5.

Further developments of the invention are specified in the dependent claims.

The arrangement of the smelting unit, transformer house and ladle furnace in a substantially rectangular arrangement, in particular when the smelting unit and the ladle furnace are arranged at different horizontal levels, makes it possible to arrange a single transformer house in the processing area.

The arrangement of ladle furnace and continuous casting next to each other in a first direction and the arrangement of the transport path for the ladle from the smelting unit to the ladle furnace at an oblique angle to this first direction make it possible to use a single control room for the melter, the ladle furnace and the continuous casting and to provide the melter, the ladle furnace and a single transformer house for both in a substantially rectangular arrangement.

Locating a pair of scrap yards in a scrap load direction adjacent to each other and placing a scrap loading section between the pair of scrap yards in the scrap load direction allows a single scrap loading section to provide a space saving arrangement for a pair of scrap yards. Further, a plurality of pairs of scrap yard with each interposed scrap loading section parallel to each other in a scrap transport direction, which is perpendicular to the scrap loading direction, arranged so that the respective scrap load sections are aligned in the scrap transport direction side by side, then a particularly space-saving arrangement of a plurality of scrap yards is possible ,

The additional placement of a scrap transport portal, which can transport scrap baskets from the scrap loading sections in the scrap transport direction out of the material feed area and back, allows the material feed area without transport paths connected therebetween directly at the processing area, i. H. to arrange the melting and continuous casting of the steelworks.

The arrangement of the smelting unit, ie, for example, the electric arc furnace, in the extension of an axis on which the scrap loading sections of the scrap yard pairs are arranged, which allows in the scrap loading sections through To charge the scrap transport portal recorded scrap baskets in the melter or a Chargiergutvorwärmer.

The combination of this arrangement of material supply area and Einschmelzaggregat, with the above arrangement of Einschmelzaggregat, ladle furnace and transformer house or smelting unit, ladle furnace and continuous casting and the associated control room allows a particularly space-saving arrangement of the components of a steel plant.

Further advantages and expediencies will become apparent from the description of an embodiment with reference to FIGS. From the figures show:

1 a plan view of a steel mill according to a first embodiment of the invention;

2 a side view of the steel mill according to the first embodiment of 1 ;

3 a plan view of the steelwork accordingly 1 with an exemplary dimension (in mm);

4 a side view of the processing area of the steel plant according to the first embodiment in a 2 opposite direction; and

5 a perspective view of a part of the steel plant of the first embodiment 1 ,

As in the 1 and 3 can be seen, the steel mill according to the embodiment has a processing area 10 , ie here a meltdown and continuous casting area, and a material feed area 20 ie a scrap collection and loading area 20 , on.

In the embodiment shown in the figures, the melter is 100 as an electric arc furnace with a Chargiergutvorwärmer in the form of a shaft 110 and with a slider 111 for pushing preheated charging material into the furnace vessel (see eg WO 2005/05248 A1 ). The shaft and slide are located in a shaft and sliding area 14 in the embodiment shown between the processing area 10 and the material feed area 20 is arranged.

If the melter is designed as a conventional electric arc furnace without shaft and slide, the shaft and slide area 14 omitted.

First, the editing area 10 described.

In the editing area 10 is a smelting unit in the form of an electric arc furnace (EAF) 100 arranged. The smelting furnace has a furnace vessel 101 , a furnace lid 102 in the embodiment shown, three electrodes 103 with associated electrode holder arms 104 and electrode feed lines 105 on. The electrode holding arms are on a corresponding electrode holding and lifting device 106 attached. As in the 2 . 4 Of course, the steelwork is naturally arranged on a B floor. The horizontal level of the floor B in the height observation z is in 2 shown on the left compared to other horizontal levels. The oven 100 is located on a furnace level O, which is a few meters, z. B. 6.5 m above the level B is. The arrangement of manhole 110 and slider 111 is at a level S that substantially corresponds to level O, e.g. B. for maintenance purposes, horizontally displaceable, as in 2 easy to recognize. The level O compared to the level B results from the design of the furnace and its size. In the illustrated embodiment, a 60t EAF is shown. Basically, the distance between B and O is in the range of 4 to 10 m, usually 6 to 7 m. On level B is a ladle transport system 150 shown, which is arranged at an angle of 30 to 60 °, here about 55 ° to the first direction x. The ladle transport system 150 defines a ladle transport path (at this angle) with which a ladle vessel 151 to a ladle furnace 120 can be transported. In the pan container 151 the molten steel is in the oven after melting 100 tapped (= recast).

In the ladle furnace, which is usually also designed as an electric arc furnace, then a part or the whole alloy and temperature adjustment of the liquid steel is made for the casting process. In 1 is the ladle furnace 120 with a pan container 121 , which of course usually, filled with liquid steel, from the pan conveyor 150 ladle vessel transported by the smelting unit is, with open ladle furnace lid 122 shown. In plan view, in the first direction, x is next to the ladle furnace 120 a continuous casting plant 130 shown. As in the 2 . 4 can be seen well, is the continuous casting mold arrangement 131 on one. Pedestal arranged at a level SG. In the figures, the casting strands are shown schematically and designated GS. The casting strands GS are in a system, not shown, for further processing, such. B. a rolling mill, out. The arrangement of the rolling mill is not the subject of this application.

Like from the 1 . 3 The melting unit is easy to recognize 100 and the ladle furnace 120 arranged obliquely relative to the first horizontal direction x. This means that a connecting line between these two furnace units runs obliquely to this first horizontal direction x. This arrangement allows a single transformer house (hereinafter transformer house) 13 to use. Even if the two kiln aggregates 100 and 120 At the same horizontal level, the arrangement would be to use a single transformer house 13 enable. In the embodiment shown, however, it is possible by the arrangement at different levels B and O, the respectively necessary transformer units and in addition also the necessary hydraulics, if desired, in a single transformer house 13 to arrange in the vertical direction z on top of each other.

It is also possible to describe this arrangement of the steelwork components differently, namely so that the connecting line of the individual transformer house 13 to the melter 100 on the one hand and the connecting line from the individual transformer house 13 to the ladle furnace 120 on the other hand in plan view relative to each other an angle <180 °, preferably in the range 70 to 110 °, z. B. 90 °, form. This then in turn allows the oblique arrangement of the transport path for the pan (through the pan conveyor 150 ) from the smelting unit to the ladle furnace.

In the embodiment shown is still the continuous casting 130 in the extension of the connecting line between Trafohaus 13 and ladle furnace 120 , ie arranged in the first horizontal direction x. In the first horizontal direction x, starting from the smelting unit 100 , is an area 11 shown as a smelting furnace and smelting furnace maintenance area 11 can be designated. It extends in the first horizontal direction x with a predetermined width of 8 to 20 m, in the example 12 m. In parallel with this, in the horizontal direction x, there is a ladle furnace / continuous casting / maintenance area 12 with the same width. In each of these areas are transport portals 11P . 12P whose transport direction is in the first horizontal direction x (along the portal rails 11s . 12s at a level HP). By means of these transport portals 11P . 12P Pans, lids, mold assemblies and the like can be transported from the areas in which they are used in maintenance areas. So it can be made spatially very close maintenance or spare parts are kept. Another optimal portal with a transport direction in a second horizontal direction y, which is perpendicular to the first horizontal direction x, with which the areas 11 . 12 is not shown.

A control room 140 is between the areas 11 . 12 and in the second horizontal direction y next to the ladle furnace 120 and the continuous casting plant 130 intended. This control room 140 serves to control and monitor the smelting furnace and the ladle furnace and the continuous casting plant. By the above-described arrangement of smelting furnace 100 , Transformer house 13 , Ladle furnace 120 and continuous casting plant 130 is the use of a single control room 140 possible.

As already described, the shaft and sliding area is located 14 in the second horizontal direction y next to the smelting furnace 100 , More precisely, the transformer house 13 , the smelting furnace 100 and the shaft and slide area 14 in plan view in a single axis along the second horizontal direction Y.

The editing area 10 can be housed in its own hall, whose mill-side wall W in 2 is shown. Alternatively, the areas 11 . 12 be separated by other walls. The manhole and slide area 14 is with the area 12 connected.

Now the material feed area 20 described. In the material feed area 20 is a first pair of junkyards 21a . 21b arranged next to each other in the first horizontal direction x. Between the two junkyards 21a and 21b of the first pair is a first scrap loading section 22a arranged. Each of the junkyards 21a . 21b has a junkyard portal 21ap respectively. 21BP (the on portal rails 21ps to run on a level SPP, 5 ) with a transport direction parallel to the first horizontal direction X on. At the junkyard portals 21ap respectively. 21BP is a scrap gripper or magnet 21ag respectively. 21BG attached. In a known manner, by means of the junkyard portals and scrap gripper or magnets scrap from the scrap yards 21a respectively. 21b in a junk basket 21a who is in the scrap loader area 22a is placed, loaded.

A second pair of junkyards 21c . 21d is likewise juxtaposed in the first horizontal direction x with a scrap loading section therebetween 22b arranged. The second pair of scrap yards is arranged parallel to the first pair such that the scrap loading sections 22a . 22b in the second horizontal direction y are aligned side by side.

A scrap transport portal 24 with a scrap transporting direction extending in the second horizontal direction y, with portal rails 24s at a level SZ along the second horizontal direction y on both sides of the loading sections 22a . 22b run, the scrap baskets 23a . 23b . 23c for charging scrap into the charging material preheater (shaft) 110 be transported, as reflected in 2 very good.

The relative arrangement of the levels B, S, O, SG, SPP, HP, SZ results from 2 ,

As seen in the plan view in the 1 . 3 The combination of the appropriately designed material supply area gives you a very good idea 20 with the appropriate editing area 10 a very compact arrangement of the steel plant, which saves about 50% compared to conventional steelworks arrangements.

At the in 1 The arrangement shown is the processing area 10 designed so that the areas 11 . 12 extend parallel to each other along the first horizontal direction x. The pairs of scrap yards also extend side by side in the first horizontal direction x, and the pairs are parallel to each other in the second horizontal direction y, with x directional loading sections 22a . 22b arranged.

Basically, the area could be 10 also be arranged so that the areas 11 . 12 along the first horizontal direction y upwards in the direction 1 extend. An in 1 shown part of the exhaust air purification 160 would then have to be on the other side of the shaft 110 can be arranged, but such an arrangement is possible in principle.

The space-saving arrangement in the processing area 10 results from the parallel arrangement of the furnace area with maintenance area 11 and the ladle and continuous casting area with maintenance area 12 , with the oblique arrangement of smelting furnace and ladle furnace relative to this direction of extent of the areas 11 . 12 , This is regardless of whether a manhole 110 is used or not.

The space savings in the material supply area 20 results from the combination of an arrangement of the loading sections 22 between the junkyard pairs and the transport of the filled scrap baskets by means of a portal (instead of a trolley). This combined arrangement in the material feed area 20 In turn, combined with the combined arrangement in the machining area to a steelworks assembly requires that the axis on which the filled scrap baskets be conveyed by means of the portal from the material supply area 20 in the editing area 10 be transported over the area in which the charging material is charged for the melter. This eliminates the transport routes for scrap basket trolley, resulting in a significant additional savings.

It is explicitly pointed out that all features disclosed in the description and / or the claims are considered separate and independent of each other for the purpose of original disclosure as well as for the purpose of limiting the claimed invention independently of the feature combinations in the embodiments and / or the claims should. It is explicitly stated that all range indications or indications of groups of units disclose every possible intermediate value or subgroup of units for the purpose of the original disclosure as well as for the purpose of restricting the claimed invention, in particular also as the limit of a range indication.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2005/05248 A1 [0024]

Claims (5)

Steelwork with a processing area ( 10 ) for melting steel scrap, and a material supply area ( 20 ) for collecting and loading steel scrap, in which in a vertical plan view in the processing area at least one electric melting furnace ( 100 ) and an electric ladle furnace ( 120 ) are arranged such that the connecting line between them extends obliquely to a first horizontal direction (x), a single transformer house ( 13 ) in the editing area ( 10 ) is arranged such that the connecting line of the electric smelting furnace ( 100 ) to the transformer house ( 13 ) substantially perpendicular to the first horizontal direction (x) and the connecting line from the transformer house ( 13 ) to the ladle furnace ( 120 ) runs substantially parallel to the first horizontal direction (x), and in which in the material supply area ( 20 ) in the vertical plan view at least a first pair of scrap yards ( 21a . 21b ) juxtaposed in a scrap yard arrangement direction (x) and with a first scrap loading section ( 22a ) are arranged between them, and at least a second pair of scrap yards ( 21c . 21d ) juxtaposed in the scrap yard arrangement direction (x) and with a second scrap loading section (FIG. 22b ) are arranged therebetween such that the scrap loading sections ( 22a . 22b ) in a scrap transporting direction which is perpendicular to the scraping jaw alignment direction, are juxtaposed, and in which the processing area (FIG. 10 ) and the material feed area ( 20 ) are arranged relative to each other such that in the vertical plan view, the extension of an axis along the scrap transport direction by the scrap loading sections ( 22a . 22b ) via a charging region for the electric smelting furnace ( 100 ) leads. Steel plant according to claim 1, wherein in the vertical plan view a continuous casting plant ( 130 ) in the first horizontal direction (x) next to the ladle furnace ( 120 ) is arranged. Steel plant according to claim 1 or 2, wherein in the plan view in the first horizontal direction (x) in the extension of the connection between the transformer house ( 13 ) and the ladle furnace ( 120 ) a storage and maintenance area for the ladle furnace ( 120 ) and the continuous casting plant ( 130 ) is arranged. Steelwork with a processing area ( 10 ) for smelting steel scrap, in which, in a vertical plan view, at least one electric smelting furnace ( 100 ) and an electric ladle furnace ( 120 ) are arranged such that the connecting line between them extends obliquely to a first horizontal direction (x), a single transformer house ( 13 ) in the editing area ( 10 ) is arranged such that the connecting line of the electric smelting furnace ( 100 ) to the transformer house ( 13 ) substantially perpendicular to the first horizontal direction (x) and the connecting line from the transformer house ( 13 ) to the ladle furnace ( 120 ) is substantially parallel to the first horizontal direction (x). Steel mill for smelting steel scrap, with a material feed area ( 20 ) for collecting and loading steel scrap, in which in a vertical plan view at least a first pair of scrap yards ( 21a . 21b ) juxtaposed in a scrap yard arrangement direction (x) and with a first scrap loading section ( 22a ) are arranged between them, and at least a second pair of scrap yards ( 21c . 21d ) juxtaposed in the scrap yard arrangement direction (x) and with a second scrap loading section (FIG. 22b ) are arranged therebetween such that the scrap loading sections ( 22a . 22b ) are aligned adjacent to each other in a scrap transporting direction perpendicular to the scraping jaw alignment direction.

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