EP1493827A1 - Charging hopper for a furnace - Google Patents

Abstract

The head has a material loading device with a rotary chute driven in rotation about vertical axis of rotation. A supply unit (28) supplies one of the measuring devices, lubrication points or similar maintenance recipients arranged in an active area of the chute. The supply unit is drivable by gear units (20, 21) assigned to the chute. The gear and supply units are placed inside a dustproof and heatproof sealing chamber.

Description

The invention relates to a furnace head or Gicht closure according to the preamble of claim 1 or the preamble of claim 2.

To feed (Befichtung) of manhole or blast furnaces with feed is a variety of different feeders known. To the load evenly distributed over the shaft cross section, in particular rotatable gout closures with a likewise decades ago rotatable, eccentric to the furnace axis arranged distributor proposed. With a Such charging device can by the mouth of the distributor on two superimposed circular paths is guided over the shaft cross-section, a largely uniform charge without training stressed bulk cone respectively.

From EP 00 65 084 B1 a rotary chute is known which is two mutually orthogonal Axes can be swiveled. One of the axles to which the chute can be swiveled, is the suspension axis of the chute; the second axis is the longitudinal axis of the chute. This device is a uniform Beschikkung allow a blast furnace, wherein in such Drehschurre no Possibility to control the uniformity of the feed.

A slightly different arrangement, as it is known from DE 295 15 419 U1 comprises a rotary chute with a rotating cylindrical housing, several at the outlet of the housing connected feed chutes with different radial extent and arranged in the housing distribution chute, whose end opens into a feed chute and with the housing is rotatable, wherein the distribution chute within the housing adjustable and the Assignment to the loading chutes is selectable. With this arrangement, the Loading profile to be set specifically; However, it is constructive and the use of materials relatively expensive.

DE-PS 868 913 are differently shaped Befäßseinrichtungen for Blast furnaces whose core pieces are a funnel-shaped funnel, which directs the good to be brought to the edge of the furnace Good, and a second funnel with vertical outlet, which feeds the feed to the furnace center. These too Arrangement is characterized by a high cost of materials; and she allows Moreover, only a very limited targeted adjustment of the loading profile from different feeds.

Another, known from DE-AS 1 169 474 rotatable delivery device comprises a plurality of distribution chutes distributed on the circumference of a circle and in addition a center near and an outer distribution chute, all be filled via a suitably guided hopper chute. In this arrangement is no arbitrary adjustment of the mouth to any point of the Shaft cross section possible; and this device is material and construction-consuming.

Finally, the charging device according to DE 199 29 180 C2, referred to the applicant. This feeder is saves space and material. It allows a very even distribution of the Material in the gout or the furnace vessel of the blast furnace.

Based on this prior art, the present invention has the object based, a furnace head with reliable material-Beschickungsvorrichung to create, whose function is also verifiable if necessary.

This object is achieved by the characterizing features of the claim 1 or claim 2 solved.

A solution of the problem arises, if only one rotary chute is present, characterized that a device for the supply of the area of action of the rotary chute arranged measuring devices, lubrication points or the like. Supply receivers is provided, this supply device by one of the rotary chute assigned Gear is driven. The aforementioned transmission thus has a multiple function. It serves in addition to the diversion of energy for measuring equipment, Lubricating oil pumps od. Like. The energy diversion is preferably carried out within an encapsulated housing, which acts with purge gas when needed becomes.

Alternatively, in an arrangement of rotary and distributor or feed chute the supply device by one of the two chutes associated Transmission, in particular driven by the upper, the rotary chute associated gear. The two chutes associated transmission and the supply device are preferably located within a dust and heat protected Dichtraumes, making an extremely compact and long-term reliable Supply of measuring equipment, lubrication points or the like. Is guaranteed. at the utilities are either a measuring device powered by dynamo and / or a lubricant pump that the two gearbox, in particular the lower, assigned to the feed chute Transmission from the housing of the higher located, the rotary chute assigned Transmission supplied with lubricant. Especially the lubricant supply of the feed material closer or lower gear is extremely critical due to the high temperatures prevailing there. Without active Lubricant supply would run the risk of the gearbox, usually runs dry and subject to increased wear. Both through the lubricant supply according to the invention as well as by the arrangement of the Gears within a sealing space and thereby caused dust protection leaves The wear of the gearbox reduce considerably with the result of a corresponding longer life. It should be mentioned here that the sealing space preferably Purging gas is applied to a dust-free zone within the same to ensure.

The measuring device is expediently facing the gout of the blast furnace Bottom of the sealing space arranged, in particular rotatable there stored arm or disk. A particularly elegant, as design simple solution is to use the measuring device on one with the rotationally driven To arrange loading chute connected arm. This is a separate one Rotary drive for the measuring device no longer required, if such is considered necessary to the entire cross-section of the shaft furnace with the measuring device "illuminate" or to detect in the desired manner.

The measuring device can IR (infrared) sensors, temperature sensors and / or radar probes exhibit. These are used to measure the surface profile of the filled Material (Profilmeter) and / or for measuring temperature, pressure, gas composition or the like. In the material loading space or in the gout.

In order to ensure the power supply of the measuring device even when the rotary chute is at a standstill this is preferably done via a backup battery, by the mentioned Dynamo is charged when needed.

Due to the extremely hot, aggressive and dusty environment of the measuring device It may be appropriate to transfer the generated by the measuring device Measuring signals wirelessly arranged on an outside of the furnace head Evaluation and display device, in particular monitor to perform.

A particularly functionally reliable and wear-free power supply of the measuring device, As well as a reliable data transmission allows a structure that both The required energy and the data is transmitted inductively. In that the Transmission occurs without contact, a high interference immunity can be achieved. In this construction can be dispensed with batteries and / or a generator or dynamo become.

Fig. 1

im schematischen Längsschnitt einen Ofenkopf mit einem oberhalb desselben angeordneten Materialbunker; und

Fig. 2

eine bevorzugte Einrichtung für einen Energie- und/oder Datentransfer zwischen einer Energie-/Datenquelle und einer Meßeinrichtung (Sensoren) innerhalb einer Konstruktion gemäß Fig. 1 in schematischem Querschnitt und vergrößertem Maßstab

zeigen.An embodiment of an inventive furnace head will be explained in more detail below with reference to the accompanying drawings, which are shown in FIG

Fig. 1

in schematic longitudinal section a furnace head with a material bunker arranged above the same; and

Fig. 2

a preferred device for energy and / or data transfer between an energy / data source and a measuring device (sensors) within a construction according to FIG. 1 in a schematic cross section and on an enlarged scale

demonstrate.

The furnace head is indicated in the accompanying drawing by the reference numeral 10. This is located above the furnace vessel 11 and the gout of an im another blast furnace not shown. Above the furnace head is a so-called Material bunker 12 placed in the bulk material via a conveyor 13th is filled. From the material bunker 12 is then the loading of the gout 11th via a rotary chute 14 and distribution or loading chute 15. The rotary chute 14 is rotationally driven about a first vertical axis of rotation 16. At the outlet, i.e. at the lower end of the rotary chute 14 is the distributor or feed chute about a second, relative to the first axis of rotation 16 laterally offset vertical axis of rotation 17 rotatably mounted. The corresponding rotational movements of the aforementioned Chutes are indicated by the arrows 18, 19.

The rotary drive of the two chutes 14, 15 is by associated transmission 20, 21st causes, for reasons of temperature and dust protection within a pot-like Seal chamber 22 are arranged. The upper, the rotary chute 14 associated Transmission 20 is still with an electric motor not shown here Drive coupled. Furthermore, the transmission of the rotational movement takes place on the lower distributor and feed chute 15 relative to the obliquely directed rotary chute 14 via a likewise not shown here geared connection between the rotary chute 14 associated gear 20 and the Beschikkungsschurre 15 associated gear 21. In this regard, the in the DE 199 29 180 C2 described construction.

The bottom of the sealing chamber 22 is characterized by a particularly heat-resistant plate 23 closed. This plate is a kind of heat shield. It also includes the housing of the feed chute 15 associated transmission 21st

It should also be noted at this point that conventionally the measurement of Surface profile 24 of the filled into the gout 11 material 25 by means of a the top of the gout laterally insertable measuring lance takes place. Accordingly are at the upper end of the gout through holes for the insertion of the measuring lance required in the direction of arrow 26. The measuring lance is in the adjacent Drawing identified by the reference numeral 27. It is obvious that these Type of measurement is expensive. It is especially for the operating staff uncomfortable due to the fact that the measuring lance manually at the top the gout of a blast furnace must be introduced. When inserting or removing The measuring lance flows material over the lance, which leads to wear. Also leaks are inevitable that are uncomfortable for the operator and in extreme cases, even lead to injuries. In addition, allow the conventional Measuring lances no exact detection of the edge areas of the gout. These are very often in the shadow of material mountains. Accordingly, there is one strong need to place measuring devices in the furnace head. Furthermore, must Of course, such measuring devices are also supplied with power.

Also, the lubricant supply of the chutes 14, 15 associated gear, in particular the lower, the feed chute 15 associated gear is a concern of the practice to ensure a permanently functionally reliable operation. In the illustrated embodiment, within the sealing space 22 a Device 28 for supplying an integrated measuring device 29 or 30, Lubrication points, e.g. the lower gear 21, or the like. Supply receivers arranged, this supply device 28 through the upper, the rotary chute 14 associated transmission 20 is driven. In the present case, the supply device comprises 28 a dynamo 31 and a lubricant pump 32nd Both Dynamo and lubricant pump are using suitable gear with the the rotary chute 14 associated gear 20 connected. This geared connection is indicated in the accompanying drawing with the gear or pinion 33.

Furthermore, the lubricant supply to the lower, the feed chute 15 associated transmission 21 from the gearbox of the upper gear 20th indicated by the supply line 34. This supply line is over the Lubricant pump 32 from the housing 35 of the rotary chute 14 assigned Gear 20 fed.

The measuring device 29 or 30 is facing to the gout 11 of the blast furnace Bottom of the sealing chamber 22 is arranged, either on a rotatable there mounted disc 36 or preferably at one with the rotationally driven Feed chute connected arm 37. The power supply between dynamo 31 and measuring device 29 and 30 is through corresponding power lines 38 and 39 indicated.

The rotatably mounted on the underside of the heat shield 23 disc 36 is a vertical axis 40 rotatably mounted (arrow 41). The rotary drive is either over a arranged on the inside of the heat shield 23 electric motor, the is also powered by the dynamo 31, or by an additional geared Connection with the rotary chute 14 associated gear 20. Also is a Geared connection between the feed chute 15 assigned Transmission 21 and the turntable 36 conceivable.

Of course, in order to avoid these geared connections, it is particularly advantageous to couple the measuring device 29 with the feed chute 15, which in any case is rotationally driven about the vertical axis 17. In the same way then would rotate the measuring device 29 about the axis 17, wherein this rotational movement superimposed would by the rotational movement of the rotary chute 14 about the center axis sixteenth This gives a complete scan of the cross section of the gout 11 the measuring device 29. The situation is of course the same with the measuring device 30, since the disc 36 both about the axis 40 and together with the heat shield 23 rotates about the axis 16. The measuring device 30 thus also performs two superimposed rotational movements. It should be noted here that the heat shield 23 is rotatably mounted with the rotary chute 14 about the vertical axis 16.

As already mentioned, the measuring device 29 or 30 IR sensors, Temperature sensors, pressure sensors and / or radar probes. By means of these sensors or probes, the surface profile 24 of the filled material 25 completely be scanned. It is additionally or alternatively possible, temperature, Pressure, gas composition, etc. in the material loading space or in the Gout 11 determine. The power supply of the measuring device 29 or 30 takes place preferably via a buffer battery for the reasons mentioned above.

The transmission of the measurement signals 29 and 30 generated by the measuring device can wirelessly to an outside of the furnace head arranged evaluation and display device respectively. Of course, just as good is a conventional transmission the measuring signals possible, especially since it is necessary anyway, via cable ensure the power supply to the measuring device of the Dynamo 31 (power line 38 and 39, respectively).

It can be seen that both the supply devices 31, 32 and supply lines 34, 38, 39 are arranged temperature and dust protected. Accordingly the construction described is characterized by a high reliability with a long service life. An access to gout below the so-called Stage 42 at the height of the top of the furnace head 10 is not required. All inspections, replacement works, repairs can be carried out by the mentioned Stage 42 made, from the top of the sealing space 22nd ago. For this purpose, in the upper lid of the furnace head 10 and des in this inserted sealing space 22 provided a so-called manhole, through which the sealing space 22 is accessible. As already mentioned, the sealing space is in front Dust and high temperature from the gout 11 protected.

It should be mentioned at this point that as an invention in the present case, the Training the sealing chamber 22 is claimed, both independently also dependent on the supply device 28. For the benefit of the sealing space 22 as dust and temperature protection is already mentioned at the beginning. Of Another is already noted above, that the heat shield 23 together with the rotary chute 14 rotates about the vertical axis 16. For this purpose is also a Connecting linkage 43 between the heat shield 23 and also with the Rotary chute 14 provided around the axis 16 co-rotating annular disc 44. The Ring disc 44 extends in the region of the rotary chute 14 associated transmission 20 around the rotary chute 14 around. The heat shield 23 also includes the Feed chute 15 associated gear 21. Accordingly, the feed chute rotates 15 together with the heat shield 23 about the first vertical axis 16 on the one hand and in addition to the second vertical axis 17 on the other. The Heat shield 23 is edge side at the lower edge of the opening of the preferably cylindrical Seal chamber 22 fluid-tight. The corresponding swivel bearing is in the attached drawing indicated by the reference numeral 45.

According to a preferred embodiment, the power supply of the measuring device takes place and the data transfer to and from this inductive. The associated structure is shown in Fig. 2. On an upper fixed flange plate 46, e.g. of the Upper cover of the furnace head or the so-called gout is an upper coil 47 arranged by corresponding electrical and / or electronic components 48 (hereafter referred to as electronics 48) with energy and / or data is supplied. On a rotating part (indicated by the arrow 49) of the Furnace head, a lower coil 50 is disposed, through an air gap of the upper coil 47 is disconnected. The upper coil 47, as mentioned by the electronics 48 is fed with energy and data, transmits the energy / data inductively to the lower coil 50. The energy / data thus transferred are used as voltage or power supply for electrical or electronic components 51 (hereinafter short referred to as electronics 51) and sensors 52, 53 used on the rotating Part of the furnace head are arranged. As a result, batteries and / or generators superfluous, which reduces the maintenance of the furnace head.

The measurement data of the sensors 52, 53 are processed in the electronics 51 and inductively transmitted via the lower coil 50 to the upper coil 47. For further processing They are then forwarded to the electronics 48, which the data evaluates and as a standard signal for further processing downstream evaluation provides. In the same way, data becomes transmitted from the electronics 48 to the electronics 51, the instructions, for example and software or software updates for the sensors 52, 53 and the electronics 51, respectively may include. This bidirectional data flow provides a high degree of flexibility Plant safe.

The upper and lower coils 47, 50 are disposed within a housing 54, which protects the coils from the aggressive atmosphere within the gout. At This point should be noted that the housing 54 and the rotary drive and / or the Geared connection between the rotary drive and the lower coil 50 includes (shown only partially in FIG. 2). Thus, the aforementioned components protected by a housing. Also, this housing can be acted upon with purge gas to keep the interior dust-free.

Alternatively, it is also conceivable that the individual components, i. the coils, the Rotary drive and / or the geared connection between rotary drive and the lower Coil 50 are each protected by separate housing, if that is in the respective construction of the furnace head is easier to implement.

All disclosed in the application documents features are essential to the invention as far as they are individually or in combination the prior art are new.

Reference numerals:

10

furnace head

11

Oven vessel (gout)

12

material hopper

13

conveyor system

14

rotary chute

15

feed chute

16

axis of rotation

17

axis of rotation

18

arrow

19

arrow

20

transmission

21

transmission

22

tight space

23

Plate or heat shield

24

surface profile

25

material

26

arrow

27

measuring lance

28

supply

29

measuring device

30

measuring device

31

dynamo

32

Lubricant pump

33

pinion

34

Lubricant supply line

35

casing

36

disc

37

poor

38

power line

39

power line

40

axis

41

arrow

42

stage

43

linkage

44

washer

45

rotary bearings

46

flange

47

upper coil

48

electrical and electronic components

49

arrow

50

lower coil

51

electrical and electronic components

52

sensor

53

sensor

54

casing

Claims (11)

Furnace head or gout closure (11) having a material feeding device comprising at least one rotary chute (14) rotationally driven about a vertical axis of rotation (16),
characterized in that
a device (28) for supplying measuring devices (29 or 30), lubrication points or the like arranged in the area of action of the rotary chute (14) supply receivers is provided, said supply device (28) by a the rotary chute (14) associated transmission (20) is drivable. A furnace head (11) having a material feeding device which has a rotary chute (14) rotationally driven about a first vertical axis of rotation (16) and a second vertical axis of rotation (17) laterally offset relative to the first axis of rotation (16) at the outlet thereof; or feed chute (15),
characterized in that
a device (28) is provided for supplying measuring devices (29 or 30), lubrication points or the like, supply receivers arranged in the area of action of three-handed or distributor chute, said supply device (28) being connected to one of the two gears (20, 21) ), in particular by the rotary chute (14) associated with transmission (20) is drivable. Oven head, in particular according to claim 1 or 2,
characterized in that
the rotary chute (14) and optionally Verteilerschurre (15) associated gear (20, 21) is at least partially closed to the gout (11), wherein the corresponding sealing space (22) can be acted upon with purge gas, and that the supply device in the aforementioned sealing space (22) is located. Furnace head according to one of claims 1 to 3,
characterized in that
the supply device (28) is a dynamo (31) supplying power to a measuring device (29 or 30) and / or a lubricant pump (32) which connects the two gears (20, 21), in particular the lower one, to the feed chute (15 ) associated transmission (21) from the housing (35) of the higher, the rotary chute (14) associated transmission (20) supplied with lubricant. Oven head, in particular according to claim 2, 3 or 4,
characterized in that
the measuring device (29 or 30) is arranged on the underside of the sealing space (22) facing the gout (11) of the blast furnace, in particular on one or a rotatably mounted arm or disk (36), preferably on a feed chute ( 15) connected arm or arm (37). Furnace head according to one of claims 1 to 5,
characterized in that
the measuring device (29 or 30) IR sensors, temperature sensors and / or radar probes, for measuring the surface profile (24) of the filled material (25) and / or for measuring temperature, pressure, gas composition or the like Material loading room or serve in the gout. Furnace head according to one of claims 5 or 6,
characterized in that
the power supply of the measuring device (29 or 30) via a backup battery. Furnace head according to one of claims 1 to 7,
characterized in that
the transmission of the measuring signals (29 or 30) generated by the measuring device wirelessly to an outside of the furnace head (11) arranged evaluation and display device (monitor) takes place. Furnace head according to one of claims 1 to 8,
characterized in that
the power supply of and / or the data transmission from and to the measuring device takes place inductively. Furnace head according to claim 9,
characterized in that
On a fixed flange plate on the one hand and a rotating part of the furnace head on the other hand coils (47, 50) are arranged, which are separated by an air gap and in each case with electrical and / or electronic components (48, 51) are in communication. Furnace head according to claim 10,
characterized in that
the coils (47, 50) are arranged within a housing (54) which protects the coils and possibly the rotary drive and / or the geared connection between rotary drive and coil (50) from the aggressive atmosphere within the gout.

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