CN214458146U

CN214458146U - Environment-friendly ladle top slag modifying device

Info

Publication number: CN214458146U
Application number: CN202120642296.2U
Authority: CN
Inventors: 徐小伟; 徐葆春; 李应江; 单永钢; 邬琼; 夏序河
Original assignee: Maanshan Iron and Steel Co Ltd
Current assignee: Maanshan Iron and Steel Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-10-22
Anticipated expiration: 2031-03-30

Abstract

The utility model discloses an environment-friendly ladle top sediment upgrading device, including be used for to the ladle provide the material the feed system, with the dust removal pipeline that the fixed cover of feed headtotail, be connected with the upper end of fixed cover with be used for covering the removal cover of ladle and liftable, the lower extreme of removal cover and fixed cover is sealing connection. The utility model discloses an environment-friendly ladle top sediment upgrading device seals, connector, removal cover combination through fixed cover, ring, and system adaptability, seal are good, the dust removal resistance is little, the fine particle dust catches the effect good to can reduce the environmental pollution that the dust caused.

Description

Environment-friendly ladle top slag modifying device

Technical Field

The utility model belongs to the technical field of the iron and steel is smelted, specifically speaking, the utility model relates to an environment-friendly ladle top sediment upgrading device.

Background

When the converter is used for smelting low-carbon aluminum killed steel, steel is usually not deoxidized or is weakly deoxidized, the molten steel has high active oxygen and strong oxidability of furnace slag (usually measured by the content of FeO and MnO), and if the converter is not subjected to modification treatment, the FeO and the MnO in the slag can oxidize the qualified molten steel after secondary oxidation treatment, so that a tundish nozzle is blocked and a flow field in a crystallizer is changed in the continuous casting process, and slag entrapment is caused. If the inclusions and entrapped mold flux generated by the secondary oxidation are captured by the billet shell, the defects such as linear and holes on the surface of the steel sheet are obvious in the cold rolling process, which not only directly affects the appearance quality, but also significantly affects the stamping performance.

In order to improve the quality of molten steel, after steel-making and tapping, reducing materials are added to adjust the physical and chemical properties of slag floating on the surface of a steel ladle, so that the oxidability of slag on the top of the steel ladle is reduced, and CaO and Al in the slag are adjusted₂O₃The content is equal, but in the modification process, a large amount of oxidation product fine particle dust is generated due to violent oxidation and reduction reactions, and the environmental pollution is serious.

The existing steel ladle top slag modifying device mainly comprises a storage bin, a first vibration feeder, a weighing hopper, a second vibration feeder, a receiving hopper and a distributing device, wherein the distributing device is arranged to mainly solve the problem of uniform distribution in the modifying process, but the steel ladle top slag modifying device cannot improve the problem of environment pollution caused by fine particle dust.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an environment-friendly ladle top slag modification device, which aims to reduce the environmental pollution caused by dust.

In order to realize the purpose, the utility model discloses the technical scheme who takes does: the environment-friendly ladle top slag modification device comprises a feeding system for providing materials for a ladle, a fixed cover connected with the feeding system, a dust removal pipeline connected with the upper end of the fixed cover and a liftable movable cover for covering the ladle, wherein the movable cover is in sealing connection with the lower end of the fixed cover.

The movable cover comprises a shell, a connector and a refractory material layer, wherein the connector is arranged on the shell and is used for being connected with the lower end of the fixed cover, the refractory material layer is arranged on the inner wall surface of the shell, and the shell is provided with a flue gas hole communicated with the central hole of the fixed cover.

The connector comprises an outer tube connected with the shell, an inner tube positioned in a central hole of the outer tube and a connector connected with the outer tube and the inner tube, the length of the inner tube is smaller than that of the outer tube, and the lower end of the fixed cover is provided with a slot for inserting the inner tube.

The fixed cover comprises a fixed cover body and a ring seal, the upper end of the fixed cover body is connected with the dust removal pipeline, the ring seal comprises a ring seal outer ring and a ring seal inner ring connected with the lower end of the fixed cover body, the ring seal outer ring is of a circular ring structure, the inserting groove is located between the ring seal outer ring and the ring seal inner ring, and the central hole of the ring seal inner ring is communicated with the central holes of the smoke hole and the fixed cover body.

The inner pipe body is located between the ring seal outer ring and the ring seal inner ring, the connecting piece is located above the ring seal outer ring, and the ring seal outer ring is located in a central hole of the outer pipe body.

The width of the slot is 5-50 cm.

The slot is filled with water.

The movable cover is connected with the lifting device, and the stroke is 10-200 cm.

The feeding system comprises a weighing hopper, a vibratory feeder for receiving materials from the weighing hopper, a receiving hopper and a discharging pipe connected with the receiving hopper, and the lower end of the discharging pipe is connected with the fixed cover.

The feeding system further comprises a conveying mechanism for conveying material from the vibratory feeder to the receiving hopper.

The environment-friendly steel ladle top slag modification device has the advantages that the combination of the fixed cover, the ring seal, the connector and the movable cover is adopted, the system adaptability and the airtightness are good, the dust removal resistance is small, and the fine particle dust capturing effect is good, so that the environmental pollution caused by dust can be reduced; and the material adaptability is wide, and the spreadability is good.

Drawings

The description includes the following figures, the contents shown are respectively:

FIG. 1 is a schematic structural view of an environment-friendly ladle top slag modifying device of the present invention;

FIG. 2 is a schematic structural view of the retaining cap;

FIG. 3 is a schematic view of the structure of the ring seal;

FIG. 4 is a schematic view of the structure of the moving cover;

FIG. 5 is a front view of the connector;

FIG. 6 is a top view of the connector;

labeled as: 1. a weighing hopper; 2. a vibratory feeder; 3. a receiving hopper; 4. a discharging pipe; 5. a dust removal pipeline; 6. a fixed cover; 601. a fixed cover body; 602. ring sealing; 603. a feeding hole; 6021. annularly sealing the outer ring; 6022. sealing an inner ring; 6023. a slot; 7. a lifting device; 8. a movable cover; 801. a housing; 802. a connector assembly; 803. a flue gas hole; 804. a layer of refractory material; 805. lifting lugs; 8021. an outer tubular body; 8022. an inner tube body; 8023. a connector cavity; 9. and (5) steel ladles.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the concept and technical solution of the present invention, and to facilitate its implementation.

As shown in fig. 1 to 6, the utility model provides an environment-friendly ladle top slag modification device, including the feed system that is used for providing the material to the ladle, fixed cover 6 be connected with feed system, with fixed cover 6 the upper end be connected dust removal pipeline 5 with be used for covering ladle and liftable remove the cover 8, remove the cover 8 and be sealing connection with the lower extreme of fixed cover 6.

Specifically, as shown in fig. 1, the fixed hood 6 is used for guiding the material from the feeding system to the ladle below, the movable hood 8 is used for sealing the upper end opening of the ladle, the movable hood 8 has a flue gas hole 803, the flue gas hole 803 is communicated with the central hole of the fixed hood 6, the fixed hood 6 is located between the dust removal pipeline 5 and the movable hood 8, the dust removal pipeline 5 is connected with the secondary dust removal system, and the dust removal pipeline 5 is provided with a control valve for controlling the opening and closing of the dust removal pipeline 5.

As shown in fig. 4 to 6, the movable cover 8 includes a housing 801, a connector 802 provided on the housing 801 and used for connecting to the lower end of the fixed cover 6, and a refractory material layer 804 provided on the inner wall surface of the housing 801, a flue gas hole 803 is provided at the center of the housing 801, and the flue gas hole 803 is a through hole provided through the housing 801.

As shown in fig. 4, the casing 801 is in the shape of a spherical crown, a smoke hole 803 is formed in the upper portion of the casing 801, the casing 801 is made of heat-resistant steel plate or other metal material, and the inner surface of the casing 801 is knotted with refractory material to form a refractory material layer 804. The material of the shell 801 is preferably Q355, the material of the refractory material layer 804 is a corundum refractory material, and the thickness of the refractory material layer 804 is 120 mm. The inner diameter of the lower bottom of the spherical crown of the shell 801 is 5400mm, and the diameter of the smoke hole 803 is 2150 mm.

As shown in fig. 4 to 6, the connector 802 includes an outer body 8021 connected to the housing 801, an inner body 8022 located in a central hole of the outer body 8021, and a connector connected to the outer body 8021 and the inner body 8022, the length of the inner body 8022 is smaller than that of the outer body 8021, and the lower end of the fixing cover 6 has a slot into which the inner body 8022 is inserted. The outer tube 8021 and the inner tube 8022 are both circular tubes, the outer tube 8021 and the inner tube 8022 are coaxially arranged, a central hole of the outer tube 8021 is coaxial with the smoke gas hole 803, the lower end of the outer tube 8021 is fixedly connected with the shell 801, the outer tube 8021 extends out towards the upper side of the shell 801, the outer edge of the connecting piece is fixedly connected with the upper end of the outer tube 8021, the inner edge of the connecting piece is fixedly connected with the upper end of the inner tube 8022, the length of the inner tube 8022 is smaller than that of the outer tube 8021, a certain gap is formed between the inner tube 8022 and the outer tube 8021 to form a connector cavity 8023, and the width of the connector cavity 8023 is 5-50cm, preferably 20 cm.

As shown in fig. 2, the fixed cowl 6 includes a fixed cowl body 601 and a ring seal 602, and an upper end of the fixed cowl body 601 is connected to the dust duct 5. The fixed cover body 601 is a hollow cylindrical cavity, the fixed cover body 601 is made of a heat-resistant steel plate or other materials, the inner circular surface of the fixed cover body 601 can be coated with refractory materials, and the service life is prolonged. The material of the fixed cover body 601 is preferably Q355, the outer diameter of the fixed cover body 601 is 2200mm, and the wall thickness is 6 mm. The fixed cover body 601 is connected with a feeding system, a feeding hole 603 is formed in the fixed cover body 601, the feeding hole 603 is communicated with the feeding system, and materials from the feeding system enter the fixed cover body 601 through the feeding hole 603 and then fall into a steel ladle downwards. The ring seal 602 and the fixed cover body 601 are of a concentric sleeve structure with the lower parts connected, and the seal ring is made of heat-resistant steel plates or other materials.

As shown in fig. 2 to 6, the material of the ring seal 602 is preferably Q355, the ring seal includes a ring seal outer ring 6021 and a ring seal inner ring 6022 connected to the lower end of the fixed cover body 601, the ring seal outer ring 6021 is a circular ring structure, the slot 6023 is located between the ring seal outer ring 6021 and the ring seal inner ring 6022, and the central hole of the ring seal inner ring 6022 is communicated with the flue gas hole 803 and the central hole of the fixed cover body 601. The ring seal outer ring 6021 and the ring seal inner ring 6022 are both circular structures, the ring seal outer ring 6021 and the ring seal inner ring 6022 are both coaxial, the diameter of the ring seal outer ring 6021 is larger than that of the ring seal inner ring 6022, the ring seal inner ring 6022 is fixedly connected with the lower end of the fixed cover body 601, the ring seal inner ring 6022 is coaxial with the fixed cover body 601, and the length of the ring seal outer ring 6021 is the same as that of the ring seal inner ring 6022. The inner pipe body 8022 is positioned between the ring seal outer ring 6021 and the ring seal inner ring 6022, the outer diameter of the inner pipe body 8022 is smaller than the inner diameter of the ring seal outer ring 6021 and larger than the outer diameter of the ring seal inner ring 6022, the inner diameter of the outer pipe body 8021 is not smaller than the outer diameter of the ring seal outer ring 6021, the outer diameter of the ring seal inner ring 6022 is the same as the outer diameter of the fixed cover body 601, the connecting piece is positioned above the ring seal outer ring 6021, and the ring seal outer ring 6021 is positioned in the central hole of the outer pipe body 8021. When the movable cover 8 is lifted, the connector 802 moves up and down relative to the ring seal, and the connector 802 and the ring seal can be always sealed, so that leakage of fine particle dust is avoided. The lower end of the ring seal outer ring 6021 is fixedly connected with the lower end of the ring seal inner ring 6022, the distance between the slot, that is, the inner circular surface of the ring seal outer ring 6021 and the outer circular surface of the ring seal inner ring 6022, and the width of the slot is 5-50cm, preferably 20 cm.

The seal ring can be matched with a water supplementing pipeline and an overflow pipeline, and water is filled in the slot, so that the leakage amount of dust is reduced. The connector 802 is flexibly connected with the ring seal reverse buckle, so that the sealing performance is good; the plugging stroke is 10-200 cm.

As shown in fig. 1, the moving hood 8 is connected to the lifting device 7, and the stroke of the moving hood 8 when it ascends and descends is 10-200cm, preferably 60 cm. The lifting device 7 is used for controlling the movable cover 8 to lift so as to separate the movable cover 8 from the ladle, or controlling the movable cover 8 to cover the ladle after descending. The lifting device 7 mainly comprises an oil cylinder and a hydraulic station, the oil cylinder is connected with the movable cover 8, the hydraulic station is used for providing hydraulic oil for the oil cylinder and controlling the flow, pressure and direction of the hydraulic oil, and the oil cylinder drives the movable cover 8 to lift.

As shown in fig. 4, lifting lugs 805 are arranged on a shell 801, the lifting lugs 805 are used for being connected with a lifting device 7, the lifting lugs 805 are connected with the top surface of the shell 801 in a welding mode, all the lifting lugs 805 are uniformly distributed on the same circumference, and 3 groups of the lifting lugs 805 are arranged. The inner diameter of the lower bottom of the spherical crown of the shell 801 is 0.10-0.50m larger than the outer diameter of the upper part of the ladle, and the diameter of the flue gas hole 803 is basically equivalent to the inner diameter of the fixed cover body 601.

As shown in fig. 1, the feeding system includes a weighing hopper 1, a vibratory feeder 2 receiving materials from the weighing hopper 1, a receiving hopper 3, and a discharging pipe 4 connected to the receiving hopper 3, and a lower end of the discharging pipe 4 is connected to a fixed cover 6. The vibratory feeder 2 is arranged between the weighing hopper 1 and the receiving hopper 3, and the vibratory feeder 2 is used for conveying materials from the weighing hopper 1 to the receiving hopper 3. The upper end of the blanking pipe 4 is connected with the discharge hole of the receiving hopper 3, and the lower end of the blanking pipe 4 is communicated with the fixed cover 6 and used for delivering materials from the receiving hopper 3 to the steel ladle. The upper end of the fixed cover 6 is communicated with the dust removal pipeline 5, and the lower end of the fixed cover is flexibly connected with the movable cover 8. Dust removal pipeline 5 is connected with secondary dust pelletizing system, and the model of dust removal pipeline 5 is DN1000, and the material of dust removal pipeline 5 is Q235.

For material transfer under complex conditions, the feeding system further comprises a conveying mechanism for conveying the material from the vibratory feeder 2 to the receiving hopper 3, and the conveying mechanism is a belt conveying mechanism.

According to the on-site physical space and process requirements, in the environment-friendly ladle top slag modifying device, a storage bin can be arranged at the front end of a weighing hopper 1. The weighing hopper 1, the vibration feeder 2 and the receiving hopper 3 can be composed of a plurality of sets.

The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.

Claims

1. The environment-friendly ladle top slag modifying device comprises a feeding system for providing materials for a ladle, and is characterized in that: the device also comprises a fixed cover connected with the feeding system, a dust removal pipeline connected with the upper end of the fixed cover and a movable cover which is used for covering the steel ladle and can be lifted, wherein the movable cover is hermetically connected with the lower end of the fixed cover.

2. The environment-friendly ladle top slag modifying device according to claim 1, characterized in that: the movable cover comprises a shell, a connector and a refractory material layer, wherein the connector is arranged on the shell and is used for being connected with the lower end of the fixed cover, the refractory material layer is arranged on the inner wall surface of the shell, and the shell is provided with a flue gas hole communicated with the central hole of the fixed cover.

3. The environment-friendly ladle top slag modifying device according to claim 2, characterized in that: the connector comprises an outer tube connected with the shell, an inner tube positioned in a central hole of the outer tube and a connector connected with the outer tube and the inner tube, the length of the inner tube is smaller than that of the outer tube, and the lower end of the fixed cover is provided with a slot for inserting the inner tube.

4. The environment-friendly ladle top slag modifying device according to claim 3, characterized in that: the fixed cover comprises a fixed cover body and a ring seal, the upper end of the fixed cover body is connected with the dust removal pipeline, the ring seal comprises a ring seal outer ring and a ring seal inner ring connected with the lower end of the fixed cover body, the ring seal outer ring is of a circular ring structure, the inserting groove is located between the ring seal outer ring and the ring seal inner ring, and the central hole of the ring seal inner ring is communicated with the central holes of the smoke hole and the fixed cover body.

5. The environment-friendly ladle top slag modifying device according to claim 4, wherein: the inner pipe body is located between the ring seal outer ring and the ring seal inner ring, the connecting piece is located above the ring seal outer ring, and the ring seal outer ring is located in a central hole of the outer pipe body.

6. The environment-friendly ladle top slag modifying device according to any one of claims 3 to 5, characterized in that: the width of the slot is 5-50 cm.

7. The environment-friendly ladle top slag modifying device according to any one of claims 3 to 5, characterized in that: the slot is filled with water.

8. The environment-friendly ladle top slag modifying device according to any one of claims 3 to 5, characterized in that: the movable cover is connected with the lifting device, and the stroke is 10-200 cm.

9. The environment-friendly ladle top slag modifying device according to any one of claims 1 to 5, characterized in that: the feeding system comprises a weighing hopper, a vibratory feeder for receiving materials from the weighing hopper, a receiving hopper and a discharging pipe connected with the receiving hopper, and the lower end of the discharging pipe is connected with the fixed cover.

10. The environment-friendly ladle top slag modifying device according to claim 9, characterized in that: the feeding system further comprises a conveying mechanism for conveying material from the vibratory feeder to the receiving hopper.