CN213357628U

CN213357628U - Iron receiving energy-saving device of hot metal ladle

Info

Publication number: CN213357628U
Application number: CN202022417719.9U
Authority: CN
Inventors: 喻中孚
Original assignee: Shanghai Xinfu Environmental Technology & Engineering Co ltd
Current assignee: Shanghai Xinfu Environmental Technology & Engineering Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-06-04
Anticipated expiration: 2030-10-27

Abstract

The utility model relates to a molten iron receiving energy-saving device of a molten iron tank, which comprises a fixed chute type structure when the molten iron tank is open, a swinging chute type structure when the molten iron tank is open, and a schematic view of the swinging chute type structure when the molten iron tank is torpedo type; the utility model reduces the heat loss in the process of putting the molten iron into the tank, thereby achieving the purpose of energy saving; meanwhile, the efficiency of the subsequent molten iron desulphurization process is improved, and the usage amount of a desulfurizer is reduced, so that the desulphurization cost is saved; and the problems of serious post-blowing of the molten steel in the subsequent converter steelmaking, large blowing loss, high consumption of steel and iron materials, high cost, no guarantee of the molten steel quality, furnace life reduction and the like are solved. In addition, the smoke generation amount in the process of putting molten iron into the tank is reduced, and the capital investment and the operation energy consumption of a dust removal facility are reduced.

Description

Iron receiving energy-saving device of hot metal ladle

Technical Field

The utility model relates to a steel smelting field especially relates to a receiving iron economizer of hot metal bottle.

Background

The molten iron with the temperature of about 1500 ℃ smelted from the iron-making blast furnace flows to a molten iron tank through a molten iron runner after coming out from a blast furnace taphole, and then is transferred to a steel-making furnace to be smelted into qualified molten steel. The common hot metal ladle has two types of open type and torpedo type, the open type hot metal ladle has small capacity and large open area; the latter has large capacity and small open area. The large and medium blast furnaces are generally torpedo type hot metal ladles, and the small and medium blast furnaces are generally open type hot metal ladles.

At present, there are two ways of transferring molten iron to a hot metal ladle: firstly, after coming out from a blast furnace taphole, molten iron directly flows to a molten iron tank through a molten iron ditch and a fixed chute, and the fall from the fixed chute mouth to the bottom of the molten iron tank varies according to the capacity of the blast furnace, but generally reaches more than 6 m; this method can only receive iron in a single tank and can be called a fixed chute type. Secondly, the molten iron flows to the molten iron tank automatically after flowing out of a blast furnace taphole and passing through a molten iron ditch, a fixed chute and a swinging chute, and the fall from the opening of the fixed chute to the bottom of the molten iron tank varies according to the capacity of the blast furnace, but generally reaches more than 8 m; because the swing chute can swing on two sides, the mode can utilize the same swing chute to make two hot metal ladles receive iron, and the mode can be called as a swing chute type. In any mode, a large amount of heat loss is generated, and the temperature of molten iron is reduced to more than 50 ℃; while the lost heat is mainly convected into the flue gas produced. Therefore, the convection heat loss in the flowing process of the molten iron is reduced, the temperature of the molten iron can be improved, the energy consumption is saved, and the subsequent molten iron pretreatment and steelmaking process are favorably influenced; meanwhile, the generation amount of the flue gas is greatly reduced, so that the capital investment and the operation energy consumption of the dust removal system can be greatly reduced. For the swing chute type, although only one of the two hot metal ladles is subjected to iron, the two hot metal ladles are covered by the smoke exhaust hood, so the smoke exhaust amount is greatly increased, namely the ineffective smoke amount is greatly increased; compared with a fixed chute type, the dust removal energy consumption is increased by more than 40%.

Disclosure of Invention

The utility model aims to overcome the defects and provide an iron receiving energy-saving device of a hot metal ladle so as to reduce the heat loss in the process of putting molten iron into the ladle and achieve the purpose of energy saving; meanwhile, the efficiency of the subsequent molten iron desulphurization process is improved, and the usage amount of a desulfurizer is reduced, so that the desulphurization cost is saved; and the problems of serious post-blowing of the molten steel in the subsequent converter steelmaking, large blowing loss, high consumption of steel and iron materials, high cost, no guarantee of the molten steel quality, furnace life reduction and the like are solved. In addition, the smoke generation amount in the process of putting molten iron into the tank is reduced, and the capital investment and the operation energy consumption of a dust removal facility are reduced.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a hot metal receiving economizer of hot metal bottle, includes hot metal bottle and hot metal bottle, and the hot metal bottle is uncovered formula, and the exit of hot metal bottle is equipped with fixed chute, is equipped with fixed chute apron on the fixed chute, is equipped with hot metal bottle apron on the hot metal bottle, and hot metal bottle apron promotes or descends through elevating gear, the export of fixed chute with be equipped with the rectilinear elephant trunk between the last mouth of hot metal bottle, the top of hot metal bottle is equipped with the enclosure.

The utility model discloses a further improvement lies in: the vertical chute consists of an inverted umbrella-shaped molten iron collecting tank at the upper section and a circular tube at the lower section, and refractory materials are arranged in the collecting tank and the circular tube.

The utility model discloses a further improvement lies in: the middle of the hot metal ladle cover plate is provided with a hot metal inlet, and the caliber of the inlet is larger than the outer diameter of the vertical chute.

The utility model provides a molten iron tank receive indisputable economizer, including molten iron ditch and two molten iron tanks, the molten iron tank is uncovered formula, the exit of molten iron ditch is equipped with fixed chute, be equipped with fixed chute apron on the fixed chute, the export below of fixed chute is connected with the swing chute through the tilting elephant trunk, the swing chute top is equipped with the swing chute apron, all be equipped with the molten iron tank apron on every molten iron tank, every molten iron tank apron promotes or descends through elevating gear respectively, the both ends export of swing chute is equipped with the rectilinear elephant trunk respectively rather than between the upper shed of the molten iron tank of below, the top of every molten iron tank all is equipped with the enclosure, be equipped with the enclosure baffle between two enclosures.

The utility model provides a hot metal receiving economizer of hot metal bottle, including molten iron ditch and two hot metal bottles, the hot metal bottle is the torpedo type, the exit of molten iron ditch is equipped with fixed chute, be equipped with fixed chute apron on the fixed chute, the export below of fixed chute is connected with the swing chute through the tilting elephant trunk, the swing chute top is equipped with the swing chute apron, the both ends export of swing chute is equipped with rectilinear elephant trunk respectively rather than between the last mouthful of the torpedo type hot metal bottle of below, the top of every torpedo type hot metal bottle all is equipped with the enclosure, be equipped with the enclosure baffle between two enclosures.

Compared with the prior art, the beneficial effects of the utility model are that:

firstly, because the cover plates are additionally arranged on the upper openings of the existing fixed chute, the existing swing chute and the existing open type hot metal ladle, and the hot metal chutes are respectively arranged between the fixed chute and the swing chute and between the swing chute and the upper opening of the hot metal ladle, the hot metal flows in the closed space from the inlet of the fixed chute to the hot metal ladle basically, thereby greatly reducing the convection heat transfer quantity and the radiation heat quantity of the high-temperature hot metal and air in the process, and improving the temperature of the hot metal by more than 30 ℃.

Secondly, in the process, the generation amount of the flue gas is also greatly reduced by more than 50 percent, the heat loss of the molten iron is further reduced, and the dust removal energy consumption of the part is greatly reduced by more than 50 percent; and the newly arranged dust removal system can also reduce the capital investment of the dust removal system.

Thirdly, as for the swing chute type, the smoke exhaust hood is internally provided with the clapboard, the smoke amount can be reduced by more than 40 percent on the conventional basis, and in addition, the smoke amount directly generated in the process of receiving iron in the hot metal ladle is greatly reduced, so the total smoke exhaust amount can be reduced by more than 70 percent.

Drawings

FIG. 1 is a schematic structural view of a fixed chute of the present invention when the hot metal ladle is open;

FIG. 2 is a schematic structural view of the swing chute of the present invention when the hot metal ladle is open;

FIG. 3 is a schematic view of the structure of the swing chute of the present invention when the hot metal ladle is torpedo type;

reference numbers in the figures: 1-molten iron ditch, 2-molten iron tank, 3-fixed chute, 4-fixed chute cover plate, 5-molten iron tank cover plate, 6-lifting device, 7-vertical chute, 8-smoke exhaust hood, 9-swing chute, 10-swing chute cover plate, 11-smoke exhaust hood partition plate and 12-inclined chute.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1 shows an embodiment of the iron receiving energy saving device of the fixed chute type hot metal ladle when the hot metal ladle is open: comprises a smoke exhaust hood 8, a fixed chute cover plate 4, a molten iron trough 1, a fixed chute 3 connected with the molten iron trough 1, a molten iron trough cover plate 5, a vertical chute 7, a lifting device 6 of the molten iron trough cover plate 5, a molten iron trough 2 and the like. The fixed chute cover plate 4 is movable and can be conveniently taken down from the fixed chute 3; the vertical chute 7 is fixed, and the lower opening of the vertical chute is higher than the upper opening of the hot metal ladle 2, so that the inlet and the outlet of the hot metal ladle 2 are not influenced; a round hole is formed in the middle of the hot metal ladle cover plate 5, and the inner diameter of the round hole is larger than the outer diameter of the vertical chute 7, so that the lifting of the hot metal ladle cover plate is not influenced; the lifting device 6 of the hot metal ladle cover plate 5 can adopt a pulley and hoisting mode, and a hoisting machine is fixed on a blast furnace platform. When tapping a blast furnace, the hot metal ladle 2 is put in place firstly, then the hot metal ladle cover plate 5 is descended to the mouth of the hot metal ladle 2, and high-temperature molten iron passes through the hot metal runner 1, the fixed chute 3 and the vertical chute 7 to reach the hot metal ladle 2; in the process, the convection heat exchange quantity of the high-temperature molten iron and air and the heat radiation quantity of the high-temperature molten iron are both greatly reduced, so that the temperature drop of the molten iron is greatly reduced by more than 30 ℃, and the smoke generation quantity is also greatly reduced by more than 50%; not only saves the energy consumption of molten iron, but also saves the corresponding energy consumption for dust removal.

The fixed chute cover plate 5 is arranged on the fixed chute 3, so that the convection heat exchange quantity of the molten iron and the air at the section is reduced. The vertical chute 7 can enable the molten iron to flow in the tube, thereby basically isolating the convection heat exchange between the section of molten iron and air. The hot metal ladle cover plate 5 and the lifting device 6 thereof are arranged at the upper opening of the hot metal ladle 2, and the hot metal ladle cover plate 5 is lowered to the upper opening of the hot metal ladle 2 before the hot metal ladle 2 is in place and receives iron; before the hot metal ladle 2 is moved away, the hot metal ladle cover plate 5 is lifted and is far away from the upper opening of the hot metal ladle 2. The middle of the hot metal ladle cover plate 5 is provided with a molten iron inlet, and the caliber of the inlet is larger than the outer diameter of the vertical chute 7, so that the lifting of the hot metal ladle cover plate 5 is not influenced.

Fig. 2 shows an embodiment of the iron receiving energy saving device of the hot metal ladle with the swinging chute type when the hot metal ladle is open: the device comprises a molten iron trough 1, a fixed chute 3 connected with the molten iron trough 1, a fixed chute cover plate 4 positioned on the fixed chute 3, an exhaust hood 8, an inclined chute 12 opposite to the fixed chute 3, an exhaust hood partition plate 11, a swing chute 9, a swing chute cover plate 10 positioned on the swing chute 9, a lifting device 6, a vertical chute 7, a molten iron trough cover plate 5, a molten iron trough 2 and the like. When the right-side hot metal ladle 2 is subjected to iron, the right-side hot metal ladle 2 is firstly in place, the swing chute 9 is inclined to the right, then the right-side hot metal ladle cover plate 5 is lowered to the opening of the right-side hot metal ladle 2, and high-temperature molten iron passes through the hot metal runner 1, the fixed chute 3, the inclined chute 12, the swing chute 9 and the right-side vertical chute 7 to reach the right-side hot metal ladle 2. In the process, the convection heat exchange quantity of the high-temperature molten iron and air and the heat radiation quantity of the high-temperature molten iron are both greatly reduced, so that the temperature drop of the molten iron is greatly reduced by more than 30 ℃, and the smoke generation quantity is also greatly reduced by more than 50%; moreover, because the smoke exhaust hood partition plate 11 is arranged, the difference of the routine that the left and right smoke exhaust hoods are normally opened is that the left smoke exhaust hood opening can be closed at the moment, so the total smoke exhaust amount can be greatly reduced by more than 70 percent compared with the routine; not only saves the energy consumption of molten iron, but also greatly saves the corresponding dust removal energy consumption. When the left hot metal ladle 2 is subjected to iron, the left hot metal ladle 2 is in position firstly, the swing chute 9 inclines leftwards, then the left hot metal ladle cover plate 5 descends to the opening of the left hot metal ladle 2, and high-temperature molten iron passes through the hot metal runner 1, the fixed chute 3, the inclined chute 12, the swing chute 9 and the left vertical chute 7 to reach the left hot metal ladle 2; the energy-saving effect obtained in the process is the same as that of the right-side hot-metal ladle 2.

The fixed chute cover plate 5 is arranged on the fixed chute 3, so that the convection heat exchange quantity of the molten iron and the air at the section is reduced. The vertical chute 7 can enable the molten iron to flow in the tube, thereby basically isolating the convection heat exchange between the section of molten iron and air. The hot metal ladle cover plate 5 and the lifting device 6 thereof are arranged at the upper opening of the hot metal ladle 2, and the hot metal ladle cover plate 5 is lowered to the upper opening of the hot metal ladle 2 before the hot metal ladle 2 is in place and receives iron; before the hot metal ladle 2 is moved away, the hot metal ladle cover plate 5 is lifted and is far away from the upper opening of the hot metal ladle 2. The middle of the hot metal ladle cover plate 5 is provided with a molten iron inlet, and the caliber of the inlet is larger than the outer diameter of the vertical chute 7, so that the lifting of the hot metal ladle cover plate 5 is not influenced. An extractor hood partition 11 is arranged between the two extractor hoods 8. Because the retaining wall is generally arranged between the two molten iron tanks 2 below the swing chute 9, the smoke exhaust space of the two molten iron tanks 2 can be basically separated after the smoke exhaust hood partition plate 11 is arranged, so that the side of the molten iron tank which is not subjected to iron can stop discharging smoke.

Fig. 3 shows the embodiment of the iron receiving energy-saving device of the hot metal ladle of the swing chute type when the hot metal ladle is of the torpedo type: the device comprises a molten iron trough 1, a fixed chute 3 connected with the molten iron trough 1, a fixed chute cover plate 5 positioned on the fixed chute 3, an exhaust hood 8, an inclined chute 12 opposite to the fixed chute 3, an exhaust hood partition plate 11, a swing chute 9, a swing chute cover plate 10 positioned on the swing chute 9, a vertical chute 7, a torpedo type molten iron trough 2 and the like; when the right-side hot-metal ladle 2 is subjected to iron, the right-side hot-metal ladle 2 is firstly in position, the swing chute 9 is inclined rightwards, and then high-temperature molten iron flows from the hot-metal trough 1, the fixed chute 3, the inclined chute 12, the swing chute 9, the right-side vertical chute 7 to the right-side hot-metal ladle 2. In the process, the convection heat exchange quantity of the high-temperature molten iron and air and the heat radiation quantity of the high-temperature molten iron are both greatly reduced, so that the temperature drop of the molten iron is greatly reduced by more than 30 ℃, and the smoke generation quantity is also greatly reduced by more than 50%; moreover, because the smoke exhaust hood partition plate 11 is arranged, compared with the conventional method that the left and right smoke exhaust hoods are normally opened, the left smoke exhaust hood opening can be closed, so that the total smoke exhaust amount can be greatly reduced by over 70 percent compared with the conventional method; not only saves the energy consumption of molten iron, but also greatly saves the corresponding dust removal energy consumption. When the left hot metal ladle 2 is subjected to iron, the left hot metal ladle 2 is firstly in position, the swing chute 9 is inclined towards the left, and then high-temperature molten iron flows to the left hot metal ladle 2 through the hot metal runner 1, the fixed chute 3, the inclined chute 12, the swing chute 9 and the left vertical chute 7; the energy-saving effect obtained in the process is the same as that of the right-side hot-metal ladle 2.

The fixed chute cover plate 5 is arranged on the fixed chute 3, so that the convection heat exchange quantity of the molten iron and the air at the section is reduced. The vertical chute 7 can enable the molten iron to flow in the tube, thereby basically isolating the convection heat exchange between the section of molten iron and air. An extractor hood partition 11 is arranged between the two extractor hoods 8. Because the retaining wall is generally arranged between the two molten iron tanks 2 below the swing chute 9, the smoke exhaust space of the two molten iron tanks 2 can be basically separated after the smoke exhaust hood partition plate 11 is arranged, so that the side of the molten iron tank which is not subjected to iron can stop discharging smoke.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hot metal receiving economizer of hot metal bottle, includes hot metal runner (1) and hot metal bottle (2), its characterized in that: the hot metal bottle (2) is uncovered formula, the exit of molten iron ditch (1) is equipped with fixed chute (3), be equipped with fixed chute apron (4) on fixed chute (3), be equipped with hot metal bottle apron (5) on hot metal bottle (2), hot metal bottle apron (5) promote or descend through elevating gear (6), the export of fixed chute (3) with be equipped with rectilinear elephant trunk (7) between the suitable for reading of hot metal bottle (2), the top of hot metal bottle (2) is equipped with enclosure (8).

2. The iron receiving energy saving device of the hot-metal ladle according to claim 1, characterized in that: the vertical chute (7) is composed of an inverted umbrella-shaped molten iron collecting tank at the upper section and a circular tube at the lower section, and refractory materials are arranged in the collecting tank and the circular tube.

3. A molten iron receiving energy saving device of a molten iron tank according to claim 1 or 2, characterized in that: the middle of the hot metal ladle cover plate (5) is provided with a hot metal inlet, and the caliber of the inlet is larger than the outer diameter of the vertical chute (7).

4. The utility model provides a hot metal bottle receive indisputable economizer, includes hot metal runner (1) and two hot metal bottles (2), its characterized in that: the hot metal ladle (2) is open, a fixed chute (3) is arranged at the outlet of the hot metal runner (1), a fixed chute cover plate (4) is arranged on the fixed chute (3), a swing chute (9) is connected below the outlet of the fixed chute (3) through an inclined chute pipe (12), a swing chute cover plate (10) is arranged above the swing chute (9), a hot-metal ladle cover plate (5) is arranged on each hot-metal ladle (2), each hot-metal ladle cover plate (5) is respectively lifted or lowered through a lifting device (6), the two ends of the swing chute (9) are respectively provided with an outlet below the outlet between the upper openings of the hot metal ladles (2) and a vertical chute (7), each of which is provided with a smoke exhaust hood (8) above the hot metal ladles (2), and a smoke exhaust hood partition plate (11) is arranged between the smoke exhaust hoods (8).

5. The iron receiving energy saving device of the hot-metal ladle according to claim 4, characterized in that: the vertical chute (7) is composed of an inverted umbrella-shaped molten iron collecting tank at the upper section and a circular tube at the lower section, and refractory materials are arranged in the collecting tank and the circular tube.

6. A molten iron receiving energy saving device of a molten iron tank according to claim 4 or 5, characterized in that: the middle of the hot metal ladle cover plate (5) is provided with a hot metal inlet, and the caliber of the inlet is larger than the outer diameter of the vertical chute (7).

7. The utility model provides a hot metal bottle receive indisputable economizer, includes hot metal runner (1) and two hot metal bottles (2), its characterized in that: the hot metal ladle (2) is the torpedo type, the exit of molten iron ditch (1) is equipped with fixed chute (3), be equipped with fixed chute apron (4) on fixed chute (3), the export below of fixed chute (3) is connected with swing chute (9) through tilting elephant trunk (12), swing chute (9) top is equipped with swing chute apron (10), the both ends export of swing chute (9) respectively with its below be equipped with rectilinear elephant trunk (7), every between the suitable for reading of torpedo type hot metal ladle (2) the top of torpedo type hot metal ladle (2) all is equipped with enclosure (8), two be equipped with enclosure baffle (11) between enclosure (8).

8. The iron receiving energy saving device of the hot-metal ladle according to claim 7, characterized in that: the vertical chute (7) is composed of an inverted umbrella-shaped molten iron collecting tank at the upper section and a circular tube at the lower section, and refractory materials are arranged in the collecting tank and the circular tube.