CN211546601U - Steel scrap baking equipment for recycling flue gas of ladle refining furnace - Google Patents
Steel scrap baking equipment for recycling flue gas of ladle refining furnace Download PDFInfo
- Publication number
- CN211546601U CN211546601U CN202020094988.3U CN202020094988U CN211546601U CN 211546601 U CN211546601 U CN 211546601U CN 202020094988 U CN202020094988 U CN 202020094988U CN 211546601 U CN211546601 U CN 211546601U
- Authority
- CN
- China
- Prior art keywords
- refining furnace
- flue gas
- ladle refining
- valve
- baking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to a flue gas recycling baking waste steel equipment of a ladle refining furnace, which comprises a water-cooled furnace cover arranged on the ladle refining furnace, wherein a feed opening is arranged on the water-cooled furnace cover, the ladle refining furnace is communicated with a feed pipe which is obliquely arranged through the feed opening, a first valve is arranged on the feed pipe, the feed pipe is communicated with a baking chamber through the first valve, and a material supporting mechanism for supporting waste steel is arranged between the first valve and the baking chamber; the upper part of the baking chamber is communicated with a dust removal system and a blanking system, and a valve II is arranged between the baking chamber and the blanking system. The utility model discloses a flue gas in dust pelletizing system will ladle refining furnace with produce during the dirt inhales the baking chamber, preheat the baking chamber. Add the steel scrap in baking chamber after baking chamber preheating, then heat the steel scrap, add the steel ladle after the preheating, this equipment utilizes hot flue gas and smoke and dust to preheat the steel scrap in, make full use of the heat in flue gas and the smoke and dust, practiced thrift the resource, reduced manufacturing cost.
Description
Technical Field
The utility model relates to a ladle refining furnace flue gas recycle toasts steel scrap equipment.
Background
During the power supply and temperature rise process of the ladle refining furnace, arc impact slag and ladle argon blowing are carried out to generate a large amount of high-temperature flue gas and smoke dust, the content of the smoke dust is 2-5g/m, the content of ferric oxide in the smoke dust is about 30%, meanwhile, the temperature of the high-temperature flue gas and the smoke dust is as high as 800-1000 ℃, and the heat of the flue gas and the smoke dust accounts for 8.25% of the total heat according to thermodynamic equilibrium calculation of the ladle refining furnace; the traditional equipment directly filters high-temperature flue gas and smoke dust and then discharges the high-temperature flue gas and the smoke dust, wherein contained metal needs to be recycled again, heat in the flue gas and the smoke dust is directly not recycled, on one hand, the metal needs to be recycled, extra resources are wasted, and on the other hand, the heat waste causes the increase of production cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a ladle refining furnace flue gas recycle that can be with the direct recycle of the metal in the smoke and dust and can utilize the heat in flue gas and the smoke and dust to preheat the scrap steel toasts the scrap steel equipment is provided.
In order to solve the above problems, the utility model adopts the following technical proposal:
a steel ladle refining furnace flue gas recycling and baking waste steel equipment comprises a water-cooled furnace cover arranged on a steel ladle refining furnace, wherein a feed opening is formed in the water-cooled furnace cover, the steel ladle refining furnace is communicated with an obliquely arranged feed pipe through the feed opening, a first valve is arranged on the feed pipe, the feed pipe is communicated with a baking chamber through the first valve, and a material supporting mechanism used for supporting waste steel is arranged between the first valve and the baking chamber;
the upper part of the baking chamber is communicated with a dust removal system and a blanking system, and a valve II is arranged between the baking chamber and the blanking system.
As a further improvement, the unloading system is a conveyor belt feeding device, the discharge port of the conveyor belt feeding device is provided with a feeding pipe, and the second valve is arranged in the baking chamber and between the feeding pipes.
As a further improvement, the material supporting mechanism is a water-cooling gate valve, a plurality of smoke supplies are arranged on the water-cooling gate valve, the ladle refining furnace circulates to the gap of the baking chamber.
As a further improvement of the utility model, the included angle between the blanking pipe and the horizontal plane is 45-60 degrees.
As a further improvement of the present invention, the first valve is a compressed air valve, and when the compressed air valve is in an open state, a nozzle therein sprays high-pressure gas to isolate the passage of flue gas; and when the compressed air valve is in a closed state, the nozzle in the compressed air valve stops jetting high-pressure gas so as to enable the flue gas in the ladle refining furnace to pass through.
As a further improvement of the utility model, the baking chamber comprises a heat preservation layer, a furnace shell, a permanent layer and an inner layer from outside to inside.
As a further improvement of the utility model, the heat preservation layer is heat preservation fireproof asbestos cloth with the thickness of 3-5 mm.
As a further improvement of the utility model, the thickness of the furnace shell is 3-5 mm.
As a further improvement of the utility model, the permanent layer is formed by knotting the steel ladle permanent layer knotting material, and the thickness is 7-10 mm.
As a further improvement of the utility model, the inner layer is formed by building ladle bricks, and the thickness is 100-120 mm.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the utility model discloses simple structure, through dust pelletizing system's suction with ladle refining furnace in flue gas and production dirt inhale the baking chamber, preheat the baking chamber, after preheating, add the steel scrap granule in the baking chamber through unloading system, after the reinforced completion, smoke and dust and flue gas are sprayed into the baking chamber through the valve hole, heat the steel scrap, in the heating, the steel scrap can hold back the metal particle in the smoke and dust, after the heating, the metal particle follows the steel scrap and gets into ladle refining furnace together; on one hand, metal resources in the smoke and dust are recycled, on the other hand, hot smoke and dust are utilized to preheat the scrap steel, heat in the smoke and dust is fully utilized, resources are saved, and production cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the supporting mechanism of the present invention;
fig. 3 is a schematic structural diagram of a first valve of the present invention;
fig. 4 is a schematic sectional view of the baking chamber of the present invention.
Wherein: 1. ladle refining furnace, 2, water-cooled furnace lid, 3, unloading pipe, 4, valve one, 5, baking chamber, 6, hold in the palm material mechanism, 7, dust pelletizing system, 8, unloading system, 9, valve two, 10, heat preservation, 11, stove shell, 12, permanent layer, 13, inlayer, 14, conveying pipe, 15, gap.
Detailed Description
To make the objects, aspects and advantages of the present invention clearer and more fully described below with reference to the following detailed description, it is to be understood that the terms "center", "vertical", "horizontal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations and positional relationships based on the drawings, and are used merely for convenience of describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Examples
As shown in FIG. 1, a ladle refining furnace flue gas recycling and baking steel scrap apparatus includes a water-cooled furnace cover 2 provided on a ladle refining furnace 1, the water-cooled furnace cover 2 having a function of preventing the temperature of a lid from being excessively high, thereby preventing the lid from being softened due to the excessively high temperature; a feed opening is formed in the water-cooled furnace cover 2, the diameter of the feed opening is 0.6 m, the ladle refining furnace 1 is communicated with a feed pipe 3 which is obliquely arranged through the feed opening, the included angle between the feed pipe 3 and the horizontal plane is 60 degrees, and the feed pipe 3 is used for enabling baked waste steel to enter the ladle refining furnace 1; a first valve 4 is arranged on the blanking pipe 3, the blanking pipe 3 is communicated with a baking chamber 5 through the first valve 4, and the first valve 4 is used for controlling the communication/disconnection between the ladle refining furnace 1 and the baking chamber 5; and a material supporting mechanism 6 for supporting the scrap steel is arranged between the first valve 4 and the baking chamber 5.
A dust removal system 7 and a blanking system 8 are communicated above the baking chamber 5, the dust removal system 7 is used for sucking out high-temperature flue gas and smoke dust generated in the ladle refining furnace 1, and the blanking system 8 is used for blanking scrap steel; baking chamber 5 with be provided with valve two 9 between the unloading system 8, valve two 9 are used for controlling unloading system 8 with the intercommunication/the disconnection between baking chamber 5.
As shown in fig. 1, the blanking system 8 is a conveyor belt feeding device, a feeding pipe 14 is arranged at a discharge port of the conveyor belt feeding device, and the second valve 9 is arranged between the baking chamber 5 and the feeding pipe 14.
As shown in fig. 2, the material supporting mechanism 6 is a water-cooled gate valve, a plurality of gaps 15 for flue gas to flow from the ladle refining furnace 1 to the baking chamber 5 are arranged on the water-cooled gate valve, and the material supporting mechanism 6 is inserted before the scrap steel is input into the baking chamber 5 to support the scrap steel; after the waste steel is roasted, the material supporting mechanism 6 is pulled out, so that the waste steel in the roasting chamber 5 enters the ladle refining furnace 1.
As shown in fig. 3, the first valve 4 is a compressed air valve, and when the compressed air valve is in an open state, a nozzle in the compressed air valve sprays high-pressure gas to isolate the passage of smoke; when the compressed air valve is in a closed state, the nozzle in the compressed air valve stops jetting high-pressure gas so as to enable the flue gas in the ladle refining furnace 1 to pass through.
As shown in fig. 4, the baking chamber 5 sequentially comprises an insulating layer 10, a furnace shell 11, a permanent layer 12 and an inner layer 13 from outside to inside; the heat-insulating layer 10 is heat-insulating refractory asbestos cloth with the thickness of 3 mm; the thickness of the furnace shell 11 is 5 mm; the permanent layer 12 is formed by knotting a steel ladle permanent layer knotting material, and the thickness is 7 mm; the inner layer 13 is formed by building ladle bricks, the thickness is 100mm, and the ladle bricks are obtained by simply processing the ladle bricks at the lower line.
The total number of ladle off-line of the company is 25 in 9 months, the refractory material of the ladle furnace is 30 tons, and the utilization rate of the off-line ladle brick is 30 percent, so that the available ladle brick is 225 tons each month, the off-line ladle brick needs simple processing, the processing cost is estimated to be 200 yuan/ton, and the quantity of the off-line ladle bricks can meet the supply of the refractory material of the heating furnace.
When using this device to toast the scrap steel, at first will preheat baking chamber 5, preheat the flow and be: the ladle refining furnace 1 is powered on and started to be in arc → the valve I4 is opened → the dust removal system 7 is opened → the baking preheating baking chamber is baked for 15 min;
after preheating baking chamber 5, toast the scrap steel, toast the flow and be: opening the first valve 4 → inserting the material supporting mechanism 6 → adding the steel scrap by using the blanking system 8 → closing the second valve 9 → electrifying and arcing the ladle refining furnace 1 → opening the dust removing system 7 → baking the steel scrap in the baking chamber 5 for 8-15 min → pulling the material supporting mechanism 6 → the steel scrap enters the ladle refining furnace 1.
It should be noted that the size parameters of the baking chamber of the present device are as follows:
| item | Value taking | Unit of |
| Diameter of | 1.20 | m |
| Height | 1.80 | m |
| Volume of | 2.03 | m³ |
| Bulk density | 3.0 | t/m³ |
| Loading capacity | 6.10 | t |
The device has the following types and requirements on the scrap steel:
| name of material | Particle requirements | Technological index | Function of |
| Reinforcing bar head | 30～50mm | Fe≥98% | |
| Punching bean | 30～50mm | Fe≥98% | |
| Dolomite | 30～50mm | Preventing scrap from sintering |
Dolomite is added according to a certain proportion when adding the steel scrap, prevents that the high temperature from toasting in-process steel scrap sintering card material phenomenon, simultaneously, needs strict requirement steel scrap granule, prevents that the card material phenomenon from appearing in the participation of large granule steel scrap.
When the device is used for baking the waste steel, 5-6 tons of waste steel can be baked in each furnace, the initial temperature of the smoke and the smoke is 800-fold and 1000 ℃, and the temperature of the baked waste steel can reach 500-fold and 600 ℃.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (10)
1. The utility model provides a ladle refining furnace flue gas recycle toasts steel scrap equipment which characterized in that: the device comprises a water-cooling furnace cover (2) arranged on a ladle refining furnace (1), wherein a feed opening is formed in the water-cooling furnace cover (2), the ladle refining furnace (1) is communicated with a discharge pipe (3) which is obliquely arranged through the feed opening, a first valve (4) is arranged on the discharge pipe (3), the discharge pipe (3) is communicated with a baking chamber (5) through the first valve (4), and a material supporting mechanism (6) for supporting waste steel is arranged between the first valve (4) and the baking chamber (5);
the upper portion of the baking chamber (5) is communicated with a dust removal system (7) and a blanking system (8), and a valve II (9) is arranged between the baking chamber (5) and the blanking system (8).
2. The ladle refining furnace flue gas recycling and baking steel scrap device according to claim 1, characterized in that: the blanking system (8) is a conveyor belt feeding device, a feeding pipe (14) is arranged at the discharge port of the conveyor belt feeding device, and the second valve (9) is arranged between the baking chamber (5) and the feeding pipe (14).
3. The ladle refining furnace flue gas recycling and baking steel scrap device according to claim 1, characterized in that: the material supporting mechanism (6) is a water-cooling gate valve, and a plurality of gaps (15) for the smoke to flow from the ladle refining furnace (1) to the baking chamber (5) are arranged on the water-cooling gate valve.
4. The ladle refining furnace flue gas recycling and baking steel scrap device according to claim 1, characterized in that: the included angle between the blanking pipe (3) and the horizontal plane is 45-60 degrees.
5. The ladle refining furnace flue gas recycling and baking steel scrap device according to claim 1, characterized in that: the first valve (4) is a compressed air valve, and when the compressed air valve is in an open state, a nozzle in the compressed air valve sprays high-pressure gas to isolate the smoke from passing through; and when the compressed air valve is in a closed state, the nozzle in the compressed air valve stops jetting high-pressure gas so as to enable the flue gas in the ladle refining furnace (1) to pass through.
6. The ladle refining furnace flue gas recycling and baking steel scrap device according to claim 1, characterized in that: the baking chamber (5) sequentially comprises a heat-insulating layer (10), a furnace shell (11), a permanent layer (12) and an inner layer (13) from outside to inside.
7. The ladle refining furnace flue gas recycling and baking steel scrap device according to claim 6, characterized in that: the heat-insulating layer (10) is heat-insulating fireproof asbestos cloth with the thickness of 3-5 mm.
8. The ladle refining furnace flue gas recycling and baking steel scrap device according to claim 6, characterized in that: the thickness of the furnace shell (11) is 3-5 mm.
9. The ladle refining furnace flue gas recycling and baking steel scrap device according to claim 6, characterized in that: the permanent layer (12) is formed by knotting a steel ladle permanent layer knotting material, and the thickness is 7-10 mm.
10. The ladle refining furnace flue gas recycling and baking steel scrap device according to claim 6, characterized in that: the inner layer (13) is formed by building ladle bricks, and the thickness is 100-120 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020094988.3U CN211546601U (en) | 2020-01-16 | 2020-01-16 | Steel scrap baking equipment for recycling flue gas of ladle refining furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020094988.3U CN211546601U (en) | 2020-01-16 | 2020-01-16 | Steel scrap baking equipment for recycling flue gas of ladle refining furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211546601U true CN211546601U (en) | 2020-09-22 |
Family
ID=72492267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020094988.3U Expired - Fee Related CN211546601U (en) | 2020-01-16 | 2020-01-16 | Steel scrap baking equipment for recycling flue gas of ladle refining furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211546601U (en) |
-
2020
- 2020-01-16 CN CN202020094988.3U patent/CN211546601U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103397129B (en) | A kind of melting reduction iron-making furnace and iron-smelting process thereof | |
| CN111440919B (en) | Argon station scrap steel adding method and argon station scrap steel adding system | |
| CN105420498A (en) | Continuous metallurgic device and metallurgic method | |
| CN108950123B (en) | Online mixing and preheating device and method for steelmaking materials | |
| CN106086275A (en) | Point stove and the method carrying out metallurgy with it are melted in a kind of combustion gas with blowing device | |
| WO2023151242A1 (en) | Metal smelting device and steelmaking production line | |
| CN109811105A (en) | Powdery iron ore suspended state direct-reduction-arc melting production molten iron method | |
| CN211546601U (en) | Steel scrap baking equipment for recycling flue gas of ladle refining furnace | |
| CN101749931A (en) | Smelting furnace | |
| CN202717792U (en) | Device for producing direct reduction iron by short process | |
| CN109974449B (en) | Novel smelting device | |
| CN101358807B (en) | Blast furnace | |
| CN212426094U (en) | System for utilize converter high temperature waste heat flue gas to toast alloy | |
| WO2017202119A1 (en) | Reduction smelting system and reduction smelting method for vanadium-titanium magnetite ore or ilmenite | |
| CN202582151U (en) | Industrial furnace for smelting nonferrous metal | |
| CN205635666U (en) | Vanadium titano -magnetite or ilmenite reducing smelting system | |
| CN204255075U (en) | Wind vanadophosphoric ferric ore deposit being carried out to ferrovanadium separation melts formula smelting furnace | |
| CN103602771B (en) | Local slope type reduction ironmaking furnace and process | |
| CN203820824U (en) | Drying and reduction integrated flash ironmaking equipment | |
| CN206706143U (en) | For melting low-sulfur phosphorus ultra-purity pig iron or the molten bath stove of pig iron containing vanadium | |
| CN102127609A (en) | Short-process ferroalloy smelting device | |
| CN107790702A (en) | Closed baking device and method for tundish soaking water inlet | |
| CN204848979U (en) | Copper smelting furnace | |
| CN1229509C (en) | Method for using solid reductant in rotary type anode furnace | |
| CN215491052U (en) | High-efficient sintering device of many first composites |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200922 Termination date: 20210116 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |