CN210420015U - Blast furnace front cast house totally enclosed dust excluding hood - Google Patents
Blast furnace front cast house totally enclosed dust excluding hood Download PDFInfo
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- CN210420015U CN210420015U CN201920974192.4U CN201920974192U CN210420015U CN 210420015 U CN210420015 U CN 210420015U CN 201920974192 U CN201920974192 U CN 201920974192U CN 210420015 U CN210420015 U CN 210420015U
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Abstract
The utility model discloses a blast furnace forehearth totally enclosed dust hood, which comprises a main dust hood covering the upper part of a main ditch in a cast house for sealing the main ditch and preventing the diffusion of smoke dust, and a cover plate assembly covering the iron ditch, a slag ditch and an emergency molten iron circulation channel in the cast house for sealing and preventing the diffusion of smoke dust; the total dust hood and each group of cover plate components can be detached and hermetically connected; the main dust hood comprises a main ditch dust hood, an intermediate dust hood and a skimmer dust hood which are sequentially communicated; a first dust removal pipeline is detachably connected to the top of the trench dust removal cover and above the main trench, and a second dust removal pipeline is connected to the side surface of the middle dust removal cover; through using the utility model provides a detachable dust excluding hood can make stokehold casting house smoke and dust effectively collected, and the casting house environment is promoted by a wide margin.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the technical field of the environmental protection equipment of iron-making blast furnace production, concretely relates to totally enclosed dust excluding hood of blast furnace stokehold cast house.
[ background of the invention ]
The blast furnace uses steel plate as furnace shell, and refractory brick lining is built in the shell. The blast furnace body is divided into five parts, namely a furnace throat, a furnace body, a furnace waist, a furnace belly and a furnace hearth from top to bottom. Because of the advantages of good economic index, simple process, large production capacity, high labor production efficiency, low energy consumption and the like of the blast furnace ironmaking technology, the iron produced by the method accounts for the vast majority of the total iron production in the world. The tapping site is a place for discharging and collecting molten iron and slag of a blast furnace ironmaking final product, and is a high-temperature, dusty and heavy-labor operation area in front of a blast furnace.
The flue gas pollution in the blast furnace production process mainly comes from blast furnace gas and a tapping field part corresponding to a tapping hole, the dust pollution of the tapping field is mainly a large amount of smoke and dust generated in the process of opening, blocking the tapping hole and tapping the blast furnace, and dust raising points of the dust pollution are mainly distributed at the positions of a main channel (the tapping hole to a skimmer part), a slag hole, a skimmer, an iron channel, a slag channel and the like. The main runner is a channel between the tapping hole and the skimmer, the skimmer is arranged at the end of the main runner, molten iron in the main runner is divided into iron slag and molten iron through the skimmer, the molten iron flows into the iron runner, and the iron slag flows into the slag runner to be discharged. In addition, an emergency molten iron circulation channel is further formed in the side face of the main channel, when the channel on the front side is blocked, molten iron can be discharged in time through the emergency molten iron circulation channel, and the molten iron is prevented from overflowing the channel and flowing to other parts of a cast house.
In the prior art, between a tapping hole and a skimmer, because the service life of a refractory material in an iron runner is 40-50 days, the iron runner needs to be trimmed every 40-50 days, in order to avoid influencing the operation of trimming equipment when the iron runner is trimmed, a dust removal device is not usually arranged on the iron runner of the section, namely, the open-air operation is kept, the self diffusion speed of smoke dust generated in the operation is low, the problems of large smoke gas amount, high dust concentration (fine dust particles) and the like in the production process of a blast furnace are caused, the smoke dust is consistently in a diffusion state, the tapping frequency of the blast furnace is high, the time is long, and the whole space of a tapping field is subjected to smoke dust, radiant heat, CO and SO2And the pollution of harmful gases is serious. Therefore, the field production operation environment of the iron yard is severe, the physical health of the staff is threatened, and partial smoke dust is diffused to the outside of the plant in an abnormal state to causeAnd the environment pollution forms an environment-friendly event.
[ Utility model ] content
The utility model aims at providing a blast furnace casthouse totally enclosed dust excluding hood to solve the serious problem of blast furnace casthouse smoke and dust pollution.
The utility model adopts the following technical scheme: a blast furnace front cast house totally-enclosed dust hood comprises a main dust hood covering the upper part of a main ditch in a cast house for sealing the main ditch and preventing smoke from diffusing, and a cover plate assembly covering the iron ditch, a slag ditch and an emergency molten iron circulation channel in the cast house for sealing and preventing smoke from diffusing; the total dust hood and each group of cover plate components can be detached and hermetically connected;
the main dust hood comprises a main ditch dust hood, an intermediate dust hood and a skimmer dust hood which are sequentially communicated; the main groove dust hood covers the main groove close to the tapping hole, the middle dust hood covers the main groove between the tapping hole and the skimmer, and the skimmer dust hood covers the skimmer; a first dust removal pipeline is detachably connected to the top of the main ditch dust removal cover and positioned above the main ditch, and a second dust removal pipeline is connected to the side surface of the middle dust removal cover;
the cover plate assembly on the iron runner is connected to the front end of the dust hood of the skimmer, and the cover plate assemblies on the emergency molten iron circulation channel and the slag runner are respectively connected to two sides of the dust hood of the skimmer.
Furthermore, the main ditch dust hood, the middle dust hood and the skimmer dust hood are all box-shaped, and the space is reduced in sequence;
the main ditch dust hood, the middle dust hood and the skimmer dust hood are all composed of detachably connected side plates and a top plate; the top panels of the middle dust hood and the skimmer dust hood are inclined planes, and one side close to the tap hole is higher than one side far away from the tap hole.
Further, the cover plate assembly comprises two bases located on two sides of the iron runner/slag runner/emergency molten iron circulation channel, and a cover plate covers between the two bases.
Furthermore, the side plate, the top plate and the cover plate are sequentially provided with a steel plate layer, an aluminum silicate fireproof layer and a heat insulation fireproof layer from outside to inside
Furthermore, movable ceilings which can be detachably connected are arranged on two sides of the top surface of the main trench dust removal cover, the movable ceilings are positioned on two sides of the first dust removal pipeline, an electric rolling door is arranged on one side surface of the main trench dust removal cover, and the electric rolling door is used for workers to come in and go out.
Furthermore, vertical smoke exhaust pipes are arranged on the periphery of the cast house in parallel at intervals.
Furthermore, an observation port is formed in the side surface of the middle dust hood.
The utility model has the advantages that: through the utility model provides a detachable dust excluding hood can make stokehold cast house smoke and dust effectively collect, realizes that zero smoke and dust is arranged outward basically, and the cast house environment is promoted by a wide margin, and carries the smoke and dust of collecting to follow-up heat exchange device through the dust removal pipeline and carry out the heat and recycle, the reasonable resource that has utilized, the utility model discloses a dust excluding hood reasonable in design, simple structure easily dismantles and installs, satisfies the on-the-spot production demand completely.
[ description of the drawings ]
FIG. 1 is a schematic structural view of a dust hood for a taphole of a cast house in front of a blast furnace;
fig. 2 is the detailed structure diagram of the cover plate base and the cover plate of the present invention.
Wherein: 1. a first dust removal duct; 2. a movable ceiling; 3. a middle dust hood; 4. a second dust removal duct; 5. an emergency molten iron circulation pipeline; 6. a smoke exhaust pipe; 7. a cover plate; 8. positioning pins; 9. a base; 10. an aluminum silicate fire barrier layer; 11. a heat-insulating and fire-proof layer; 12. an iron runner; 13. an electric rolling gate; 14. a viewing port; 15. a slag runner; 16. a skimmer dust hood.
[ detailed description ] embodiments
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses a blast furnace front cast house totally enclosed dust excluding hood, as shown in figure 1, comprising a main dust excluding hood covering the upper part of a main ditch in the cast house for sealing the main ditch and preventing the diffusion of smoke dust, and a cover plate component covering the iron ditch 12, the slag ditch 15 and the emergency molten iron circulation channel 5 in the cast house for sealing and preventing the diffusion of smoke dust; the total dust hood and each group of the cover plate assemblies can be detached and connected in a sealing mode.
The total dust hood comprises a main ditch dust hood, a middle dust hood 3 and a skimmer dust hood 16 which are sequentially communicated. The main channel dust hood covers the main channel near the taphole, the middle dust hood 3 covers the main channel between the taphole and the skimmer, and the grate dust hood 16 covers the skimmer. Between curb plate middle part and the middle dust excluding hood 3 before the main ditch dust excluding hood, all communicate between 3 preceding curb plates of middle dust excluding hood and the skimmer dust excluding hood 16, make its inside formation link up the space, make whole dust excluding hood form an overall space to seal, make things convenient for the smoke and dust to collect, be moreover between the three and dismantle the connection, when the cast house needs to be maintained, can all detach and hang from the cast house.
The main trench dust hood, the middle dust hood 3 and the skimmer dust hood 16 are all box-shaped, and the space is reduced in sequence. The main trench dust hood, the middle dust hood 3 and the skimmer dust hood 16 are all composed of detachably connected side plates and a top plate. The top panels of the middle dust hood 3 and the skimmer dust hood 16 are inclined planes, and one side close to the taphole is higher than one side far away from the taphole.
The cover plate component on the iron runner 12 is connected to the front end of the skimmer dust hood 16, and the cover plate components on the emergency molten iron circulation channel 5 and the slag runner 15 are respectively connected to the two sides of the skimmer dust hood 16.
The main channel is an iron channel part between the iron outlet and the skimmer, and molten iron and iron slag are mixed in the main channel during working, so that a large amount of pollution smoke dust can be generated. The main ditch dust hood covers the upper part of the main ditch, is box-shaped and consists of side plates and a top plate, and is internally provided with a frame which consists of stand columns and cross beams.
In addition, an aluminum silicate fireproof layer 10 and a heat insulation fireproof layer 11 are sequentially arranged on the inner wall surface of each side plate and the inner wall surface of each top plate, preferably, the aluminum silicate fireproof layer 10 is an aluminum silicate felt, and the heat insulation fireproof layer 11 is fireproof paint. Prevent on the one hand that the molten iron scum from causing damage to curb plate and roof, on the other hand reduces the heat loss of molten iron and scum, keeps the heat in the dust excluding hood. In order to ensure the flowing efficiency of smoke dust in the dust hood, the connecting part between the front side plate and the top plate of the main groove dust hood can be set to be a chamfer or a fillet, and the dust hood more conforms to the flowing characteristic of smoke dust relative to a right angle, and ensures smooth flowing.
Main ditch dust excluding hood top just is located the main ditch top and can dismantle and be connected with first dust removal pipeline 1, and the inside smoke and dust of main ditch dust excluding hood is removed through first dust removal pipeline 1, reduces the smoke and dust volume, and main ditch dust excluding hood top and first dust removal pipeline 1 connecting portion are protruding to the top, can be so that the smoke and dust circulation is more smooth and easy.
Be connected with second dust removal pipeline 4 on the curb plate of middle dust excluding hood 3, can suck the inside smoke and dust of middle dust excluding hood 3 through second dust removal pipeline 4, reduce pollution smoke and dust content, the secondary dust fall, partial surplus smoke and dust can flow to the main ditch dust excluding hood along with the top surface of its slope in, the first dust removal pipeline 1 of rethread is discharged. The other side plate of the middle dust hood 3 is provided with an observation port 14 which can be used for observing the molten iron state of the main ditch outside the dust hood when molten iron is put.
The movable ceilings 2 which can be detachably connected are arranged on the two sides of the top surface of the main ditch dust hood, the movable ceilings 2 are positioned on the two sides of the first dust removal pipeline 1, and large mechanical equipment can be lifted out or into the main ditch dust hood from the top of the main ditch dust hood through the disassembly of the movable ceilings 2, so that the mechanical equipment can be maintained conveniently. Install electronic shutter door 13 on a curb plate of main ditch dust excluding hood, electronic shutter door 13 is used for supplying the staff to come in and go out, and another side sets up according to actual need, also can set up to electronic shutter door 13, also can be provided with windows etc..
Every is movable ceiling 2 and frame construction between all establish to dismantling the connection, optionally for common connected mode such as bolt, conveniently dismantles movable ceiling when repairing the main ditch and hangs to provide operating space. Moreover, since the operating devices are provided on both sides of the main trench, the movable ceiling 2 can be detached and the operating devices can be lifted out or in during maintenance or repair. Moreover, a plurality of positioning columns can be arranged on the frame, and a plurality of positioning holes are correspondingly formed in each movable ceiling 2, so that each movable ceiling 2 can be conveniently positioned, and the positions of the movable ceilings 2 before and after disassembly are guaranteed to be unchanged.
The skimmer dust hood 3 is also box-shaped and is composed of a frame 2, side plates and a top plate, and the structure and the connection mode of the skimmer dust hood are the same as those of the main ditch dust hood. The skimmer dust hood 3 is used to cover over the skimmer and collect the fumes, and also to remove and hang off over the skimmer when the main gutter is being refurbished, providing an operating space for the refurbisher or vehicle. The top plate of the dust hood 3 of the skimmer is an inclined plane, and the vertical distance between the rear end of the dust hood and the skimmer is greater than that between the front end of the dust hood and the skimmer, so that smoke can flow backwards, enter the middle dust hood and then be discharged through the second dust removal pipeline 4.
The front end of the skimmer dust hood 3 is detachably connected with a cover plate assembly of an iron runner 12, the iron runner 12 is a channel through which molten iron filtered by the skimmer flows, and the skimmer dust hood is not provided with too much smoke dust and only needs to cover the cover plate assembly to prevent the smoke dust from diffusing. The other two sides of the skimmer dust hood 3 are connected to the cover plate assemblies of the emergency molten iron flow channel 5 and the slag runner 15, respectively.
The cover plate assembly comprises two bases 9 positioned on two sides of the iron runner 12/slag runner 15/emergency molten iron circulation channel 5, a cover plate 7 covers between the two bases 9, and the two bases are detachably connected through a positioning pin 8. The cover plate assembly is used for covering the iron runner 12, the slag runner 15 and the emergency molten iron flowing channel 5 to prevent the diffusion of smoke dust.
The iron runner 12 is the part of the iron runner where the molten iron after passing through the skimmer flows, the slag runner 15 is the slag runner after passing through the skimmer, and the emergency molten iron flow channel 5 is an emergency molten iron discharge channel which is started when the iron runner or the slag runner is blocked. The three channels contain a small amount of smoke and dust, and the smoke and dust can be simply sealed. In addition, as the side walls and the bottom surfaces of the iron runner 12, the slag runner 15 and the emergency molten iron flow channel 5 are excavated by an excavator, the surfaces of the iron runner and the slag runner are uneven after excavation, and the base 9 can ensure the smoothness of the surface of the iron runner, so that the iron runner can be conveniently connected with other devices or equipment. Therefore, the base 9 is arranged on the side wall and the bottom surface to enable the surface to be flat, the positioning connection is carried out through the positioning pin 8, the cover plate 7 is covered on the upper surface of the base 9 to form an inner closed space, and the smoke dust is prevented from leaking. An aluminum silicate fireproof layer 10 and a heat insulation fireproof layer 11 are sequentially arranged on the bottom surface of the cover plate 7.
In addition, vertical smoke exhaust pipes 6 are arranged on the periphery of the casting house at intervals in parallel, the smoke exhaust pipes 6 are hollow pipes, the lower end of each smoke exhaust pipe is close to the ground of the casting house, smoke on the ground can be exhausted to the outside to be treated when molten iron is placed, heat conduction can be carried out through the smoke exhaust pipes, heat dissipation of casting house equipment is facilitated, and due to the fact that the smoke exhaust pipes are arranged on the periphery of the casting house at intervals, falling objects above a blast furnace can be prevented from entering the casting house, and the protection effect is achieved.
The embodiment of the utility model provides a dust cover for the design of No. 1 blast furnace casting field at certain steel mill, main ditch dust excluding hood is long 40m, wide 15m, high 8m, 3 long 14m of middle dust excluding hood, wide 10m, high 6m, 16 long 3m of skimmer dust excluding hood, wide 3m, high 2m, and at iron runner 12, slag runner 15, and spread on emergent molten iron circulation channel 5 and establish the apron subassembly, connect seamless between each part, when the casting, on-the-spot whole smoke and dust free, the effect is very good.
Claims (7)
1. A blast furnace front cast house totally-enclosed dust hood is characterized by comprising a main dust hood which covers the upper part of a main ditch in a cast house and is used for sealing the main ditch and preventing smoke from diffusing, and a cover plate component which covers the main ditch (12), a slag ditch (15) and an emergency molten iron circulation channel (5) in the cast house and is used for sealing and preventing smoke from diffusing; the total dust hood and each group of the cover plate assemblies can be detached and hermetically connected;
the main dust hood comprises a main ditch dust hood, an intermediate dust hood (3) and a skimmer dust hood (16) which are sequentially communicated; the main groove dust hood covers the main groove close to the tapping hole, the middle dust hood (3) covers the main groove between the tapping hole and the skimmer, and the skimmer dust hood (16) covers the skimmer; a first dust removal pipeline (1) is detachably connected to the top of the main ditch dust removal cover and above the main ditch, and a second dust removal pipeline (4) is connected to the side surface of the middle dust removal cover (3);
the cover plate assembly on the iron runner (12) is connected to the front end of the skimmer dust hood (16), and the cover plate assemblies on the emergency molten iron circulation channel (5) and the slag runner (15) are respectively connected to the two sides of the skimmer dust hood (16).
2. The totally enclosed dust excluding hood for the blast furnace forehearth casting house according to claim 1, wherein the main trench dust excluding hood, the middle dust excluding hood (3) and the skimmer dust excluding hood (16) are all box-shaped, and the space is reduced in sequence;
the main ditch dust hood, the middle dust hood (3) and the skimmer dust hood (16) are all composed of side plates and a top plate which are detachably connected; the top panels of the middle dust hood (3) and the skimmer dust hood (16) are inclined planes, and one side close to the taphole is higher than one side far away from the taphole.
3. The totally enclosed dust excluding hood for the cast house in front of the blast furnace according to claim 2, wherein said cover plate assembly comprises two bases (9) located at both sides of the iron runner (12)/slag runner (15)/emergency molten iron flow channel (5), and a cover plate (7) is covered between the two bases (9).
4. The totally enclosed dust excluding hood for the blast furnace forehearth according to claim 3, wherein said side plates, top plate and cover plate (7) are sequentially provided with a steel plate layer, an aluminum silicate fire-proof layer (10) and a heat-insulating fire-proof layer (11) from outside to inside.
5. The totally enclosed dust excluding hood for the blast furnace forehearth according to claim 3 or 4, wherein the movable ceilings (2) detachably connected are arranged on both sides of the top surface of the main channel dust excluding hood, the movable ceilings (2) are arranged on both sides of the first dust excluding pipe (1), an electric rolling door (13) is arranged on one side surface of the main channel dust excluding hood, and the electric rolling door (13) is used for workers to come in and go out.
6. The totally enclosed dust excluding hood for the cast house in front of the blast furnace according to claim 5, characterized in that vertical smoke exhaust pipes (6) are arranged in parallel at intervals around the cast house.
7. The totally enclosed dust excluding hood for the cast house in front of the blast furnace according to claim 3 or 4, wherein the side of the middle dust excluding hood (3) is provided with an observation port (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920974192.4U CN210420015U (en) | 2019-06-26 | 2019-06-26 | Blast furnace front cast house totally enclosed dust excluding hood |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920974192.4U CN210420015U (en) | 2019-06-26 | 2019-06-26 | Blast furnace front cast house totally enclosed dust excluding hood |
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| CN210420015U true CN210420015U (en) | 2020-04-28 |
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| CN201920974192.4U Active CN210420015U (en) | 2019-06-26 | 2019-06-26 | Blast furnace front cast house totally enclosed dust excluding hood |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306003A (en) * | 2019-06-26 | 2019-10-08 | 陕西龙门钢铁有限责任公司 | Cast house totally enclosed type dust excluding hood before a kind of State of Blast Furnace |
| CN114134273A (en) * | 2021-11-02 | 2022-03-04 | 北京首钢股份有限公司 | Dust hood for blast furnace casting house |
-
2019
- 2019-06-26 CN CN201920974192.4U patent/CN210420015U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306003A (en) * | 2019-06-26 | 2019-10-08 | 陕西龙门钢铁有限责任公司 | Cast house totally enclosed type dust excluding hood before a kind of State of Blast Furnace |
| CN114134273A (en) * | 2021-11-02 | 2022-03-04 | 北京首钢股份有限公司 | Dust hood for blast furnace casting house |
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