CN217438225U - Spiral type hot direct reduced iron conveying device - Google Patents
Spiral type hot direct reduced iron conveying device Download PDFInfo
- Publication number
- CN217438225U CN217438225U CN202221349272.9U CN202221349272U CN217438225U CN 217438225 U CN217438225 U CN 217438225U CN 202221349272 U CN202221349272 U CN 202221349272U CN 217438225 U CN217438225 U CN 217438225U
- Authority
- CN
- China
- Prior art keywords
- reduced iron
- direct reduced
- hot
- state direct
- screw
- 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.)
- Active
Links
Images
Landscapes
- Furnace Charging Or Discharging (AREA)
Abstract
The utility model relates to a spiral thermal state direct reduced iron conveying device, which is arranged between a shaft furnace and an electric furnace and comprises a thermal state direct reduced iron storage tank and a spiral conveying device; the thermal state direct reduced iron storage tank is arranged below the shaft furnace and is used for hermetically storing thermal insulation and metering thermal state direct reduced iron output from an outlet at the bottom of the shaft furnace; the screw conveying device comprises a hot feeding groove structure, a screw shaft structure is arranged in the hot feeding groove structure, a central shaft of the screw shaft structure is arranged along the length direction of the hot feeding groove structure, and the screw shaft structure can rotationally push materials in the hot feeding groove structure to move towards the discharge hole. The utility model discloses a simple and reliable mode has realized DRI heat transfer hot charge between shaft furnace and the electric stove, and adaptable different engineering application environment has compared in other schemes such as apron board bucket type and has simplified equipment structure greatly, has reduced engineering investment, equipment fault rate and cost of maintenance, electric stove ton steel smelting power consumption, has improved production efficiency.
Description
Technical Field
The utility model relates to a steelmaking technical field especially relates to a spiral hot state direct reduced iron conveyor.
Background
At present, in hydrogen metallurgy, Iron ore is Reduced in a gas-based shaft furnace mainly through a mixed gas of hydrogen and CO to obtain Direct Reduced Iron (DRI) which is used as a raw material for electric arc furnace steelmaking in the next procedure.
The DRI enters the next procedure of electric arc furnace steelmaking in two ways, namely a cold state and a hot state.
When the cold direct reduced iron is used as the raw material of the electric furnace, the DRI can be continuously fed into the furnace by adopting a conventional belt conveyor and a nitrogen sealed bin, the equipment is simple and reliable, and the production is stable and smooth. However, the cold direct reduced iron is used as the raw material for steelmaking, the energy consumption of the electric furnace is too high, and the steelmaking production cost of the electric furnace is increased.
The hot DRI is used as the raw material for electric furnace steelmaking, and the direct reduced iron at 600 ℃ brings certain physical heat to the electric furnace, so that the power consumption and smelting time for electric furnace steelmaking can be greatly reduced. Meanwhile, after the hot direct reduced iron is directly hot-charged into the electric furnace, the energy and materials used for cooling the hot direct reduced iron at the rear part of the direct reduction procedure can be reduced. The DRI can save electric energy by about 25 degrees per ton of steel when the temperature of the DRI in the electric furnace is increased by 100 ℃, the DRI can save electric energy by 150 degrees per ton of steel according to the charging temperature of 600 ℃, compared with the DRI fed into the furnace by cold charge, and the DRI can save 90 yuan per ton of steel cost according to the accounting of 0.6 yuan per degree.
Therefore, the method realizes the thermal state storage and transportation of the direct reduced iron between the hydrogen metallurgy process and the electric furnace process, and has important significance for saving energy and reducing consumption of the low-carbon steel-making process route of hydrogen metallurgy and an electric arc furnace.
However, the hot (about 600 ℃) direct reduced iron needs to be transported by adopting high-temperature resistant equipment in the process of being sent into a steel-making workshop, and meanwhile, the direct reduced iron must be prevented from contacting with air, otherwise, the problem of secondary oxidation is easy to occur.
The prior DRI hot charging electric furnace technology mainly comprises three technologies of gravity direct feeding, chain bucket transferring, pneumatic conveying and the like.
The pneumatic conveying method can realize hot conveying of direct reduced iron and hot charging of the electric furnace, but the investment and the operation cost are both very high. The disadvantages of pneumatic conveying: (1) the power consumption is large; (2) the equipment is seriously abraded; (3) the conveyed materials are limited by the process, and the materials which are wet, easy to bond and fragile cannot be conveyed; (4) the pneumatic conveying is carried out in three bed states, and a continuous fluidized bed is used in the conveying process, so that the flow velocity of the materials is not easy to control.
The gravity conveying system designed according to the conditions of the shaft furnace and the electric furnace is also called a thermal connection system. It has the following disadvantages: the discharge hole of the direct reduced iron needs to be higher than the feeding hole of the electric furnace, so that the height of the shaft furnace foundation is greatly increased, and the engineering investment and the construction difficulty are increased. Meanwhile, the method requires that the shaft furnace is arranged close to the electric furnace, and limits the process arrangement of the electric furnace to a certain extent.
The prior art is concerned with a heat resistant container tanker delivery system. This system requires the use of a slat conveyor to effect lateral movement of the hot DRI.
In the prior art, a skirt plate bucket type conveying system is a material basket protection conveying system. Any charging basket is developed by adopting refractory materials and is specially designed for conveying hot materials. The bottom of the bucket is provided with an integrated cross beam. The frequency controlled motor enables the conveying speed to be matched to varying conveying capacities. In addition, the drive or bucket height monitoring system is part of the apparatus. The technology has the advantages of complex structure, high engineering investment, high equipment failure rate and high maintenance cost, and is not beneficial to popularization and use.
In the prior art, a chain bucket type hot direct reduced iron conveyor (CN102161423B) can be theoretically used for conveying hot direct reduced iron, but the hot direct reduced iron is a high-temperature material, the temperature resistance of a conventional conveying system can only reach about 250 ℃, the tapping temperature of the hot direct reduced iron is generally about 600-850 ℃, and the problem of hopper thermal deformation failure exists; the chain wheel form and the hopper form have the problem of vibration of a chain system, and because the mass of the material conveying hopper, the material and the chain link is large, the generated inertia force is also large, and the impact of the chain wheel is large. The impact caused by the polygon effect is not negligible because of the long conveying distance and the heavy equipment of the integrated steel plant.
Therefore, the inventor provides a spiral type hot-state direct reduced iron conveying device by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a spiral thermal state direct reduced iron conveyor, the utility model discloses a simple and reliable mode has realized that DRI heat is sent hot dress between shaft furnace and the electric stove, and adaptable different engineering application environment has compared in other schemes such as apron board bucket type and has simplified equipment structure greatly, has reduced engineering investment, equipment fault rate and cost of maintenance, electric stove ton steel smelting power consumption (-125 kWh/t), has improved production efficiency.
The utility model aims to realize that a spiral type thermal state direct reduced iron conveying device is arranged between a shaft furnace and an electric furnace and comprises a thermal state direct reduced iron storage tank and a spiral conveying device; the thermal state direct reduced iron storage tank is arranged below the shaft furnace and is used for hermetically storing thermal insulation and metering thermal state direct reduced iron output from an outlet at the bottom of the shaft furnace; the spiral conveying device comprises a hot feeding groove structure arranged below the thermal state direct reduced iron storage tank, a first end of the hot feeding groove structure can be communicated with an outlet of the thermal state direct reduced iron storage tank, a second end of the hot feeding groove structure is provided with a discharge hole, and the discharge hole can be communicated with an electric furnace; the hot feeding groove structure is internally provided with a screw shaft structure, the central shaft of the screw shaft structure is arranged along the length direction of the hot feeding groove structure, and the screw shaft structure can rotationally push the materials in the hot feeding groove structure to move towards the discharge hole.
The present invention provides a preferable embodiment, the screw conveying device includes a speed reduction motor disposed at one end of the hot conveying groove structure, the screw shaft structure includes a screw shaft, the speed reduction motor is coupled to the screw shaft through a coupling, and a helical blade is disposed on a side wall of the screw shaft.
In a preferred embodiment of the present invention, the number of the screw shafts is two, two the screw shafts are parallel and spaced from each other.
In a preferred embodiment of the present invention, the screw shaft is a water-cooling structure.
In a preferred embodiment of the present invention, the helical blade is made of heat-resistant stainless steel.
In a preferred embodiment of the present invention, a sealing cover capable of sealing the hot feeding trough structure from the top is disposed above the hot feeding trough structure, and a sealing chamber is formed between the sealing cover and the hot feeding trough structure; the top of the sealed bin is provided with a first feeding port and a second feeding port, the outlet of the thermal state direct reduced iron storage tank is communicated with the first feeding port, and the second feeding port is used for adding smelting materials from the high-position storage bin system.
In a preferred embodiment of the present invention, a sealing gas pipe is disposed at the top of the hot feed trough structure, and the sealing gas pipe is used for blowing inert gas into the sealing bin to reduce the secondary oxidation of the hot direct reduced iron.
In a preferred embodiment of the present invention, the hot feeding structure comprises a bucket body, and a heat insulation lining is disposed in the bucket body.
In a preferred embodiment of the present invention, the cross section of the bucket body is U-shaped, and the discharge hole is disposed at the bottom of the second end of the bucket body.
The utility model discloses an in a preferred embodiment, the both ends of screw axis are all sealed to be passed the both ends of groove fill body, the both ends outside of groove fill body sets up the bearing frame, the both ends of screw axis articulate respectively in two on the bearing frame.
In a preferred embodiment of the present invention, the thermal state direct reduced iron storage tank includes a first shell, and a tank liner is disposed in the first shell; the top of the thermal state direct reduced iron storage tank is provided with a first valve capable of being automatically closed, the bottom of the thermal state direct reduced iron storage tank is provided with a second valve capable of being automatically closed, the thermal state direct reduced iron storage tank is communicated with a high temperature resistant chute through the second valve, and the bottom of the high temperature resistant chute is communicated with a first end of the hot feeding groove structure; the thermal state direct reduced iron storage tank is supported and arranged on a first tank body support, and a weighing device is arranged at the bottom of the first tank body support.
From above, the utility model discloses a spiral hot state direct reduced iron conveyor has following beneficial effect:
in the utility model, the thermal state direct reduced iron storage tank is arranged below the shaft furnace, and the gravity blanking of the thermal state direct reduced iron is utilized to realize the transfer of the thermal state DRI, thereby reducing the lifting and climbing in the traditional DRI conveying process and reducing the energy consumption; the thermal state direct reduced iron storage tank can hermetically store and measure the thermal state direct reduced iron output from the bottom outlet of the shaft furnace in a heat preservation way, so that the concept of storing, measuring and conveying the thermal state DRI is realized, and the energy consumption in the conveying process is reduced; the spiral shaft structure of the spiral conveying device rotates around the central shaft to push the thermal state DRI and the smelting materials to move towards the discharge hole, so that the function of layered and synergistic charging of slagging materials and DRI is realized; the utility model discloses a simple and reliable mode has realized DRI heat transfer hot charge between shaft furnace and the electric stove, and adaptable different engineering application environment has compared in other schemes such as apron board bucket type and has simplified equipment structure greatly, has reduced engineering investment, equipment fault rate and cost of maintenance, electric stove ton steel smelting power consumption (-125 kWh/t), has improved production efficiency.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
FIG. 1: does the utility model discloses a schematic diagram of spiral hot state direct reduced iron conveyor.
FIG. 2 is a schematic diagram: is the appearance diagram of the spiral conveying device of the utility model.
FIG. 3: does the utility model discloses a structure chart when setting up a screw axis in the screw conveyor.
FIG. 4: is a cross-sectional view taken at a-a in fig. 3.
FIG. 5: does the utility model discloses a structure chart when setting up two screw axes in the screw conveyer.
In the figure:
100. a spiral type hot direct reduced iron conveying device;
1. a thermal state direct reduced iron storage tank;
11. a first valve; 12. a second valve; 13. a high-temperature resistant chute; 14. a thermal expansion joint;
2. a screw conveyor;
21. a hot feed trough structure; 211. a trough bucket body; 212. a heat insulation slot liner; 22. a screw shaft structure; 221. a screw shaft; 222. a helical blade; 23. a reduction motor; 24. a sealing cover; 241. a first feeding port; 242. a second feeding port; 25. sealing the gas pipe; 26. a bearing seat;
3. a shaft furnace;
4. an electric furnace;
5. high-order feed bin system.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
The specific embodiments of the present invention described herein are provided for illustrative purposes only and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as falling within the scope of the invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 5, the present invention provides a screw type thermal state directly reduced iron conveying device 100, which is disposed between a shaft furnace 3 and an electric furnace 4, and comprises a thermal state directly reduced iron storage tank 1 and a screw conveying device 2; the thermal state direct reduced iron storage tank 1 is arranged below the shaft furnace 3, and the thermal state direct reduced iron storage tank 1 is used for hermetically storing thermal insulation and metering thermal state direct reduced iron output from an outlet at the bottom of the shaft furnace; the spiral conveying device 2 comprises a hot trough conveying structure 21 arranged below the hot direct reduced iron storage tank 1, and the spiral conveying device 2 is horizontally arranged or arranged at a certain included angle with the horizontal direction; the first end of the hot feeding groove structure 21 can be communicated with the outlet of the thermal state direct reduced iron storage tank 1, the second end of the hot feeding groove structure 21 is provided with a discharge hole, and the discharge hole can be communicated with the electric furnace 4; the screw shaft structure 22 is arranged in the hot feeding groove structure 21, the central shaft of the screw shaft structure 22 is arranged along the length direction of the hot feeding groove structure, and the screw shaft structure 22 can rotationally push the materials (hot DRI and smelting materials) in the hot feeding groove structure 21 to move towards the discharge hole.
The hot state direct reduced iron storage tank 1 is arranged below the shaft furnace 3, hot state direct reduced iron (hot state DRI, 500-800 ℃) reduced from the shaft furnace (shaft furnace reactor) enters the hot state direct reduced iron storage tank 1 under the action of gravity, the hot state direct reduced iron storage tank 1 has the functions of sealing, heat preservation and weighing, when DRI needs to be added into a downstream electric furnace, the hot state DRI falls into the spiral conveying device 2 from the hot state direct reduced iron storage tank 1, and the spiral conveying device 2 can horizontally convey or lift and convey the hot state DRI into a DRI charging hopper (high temperature resistant charging hopper) at the top of the electric furnace according to a certain angle.
In the screw conveyor 2, the screw shaft structure 22 rotates around the central shaft, and pushes the material in the heat transfer groove structure 21 to move to the discharge port, and finally the material is conveyed to the electric furnace 4.
The spiral hot-state direct reduced iron conveying device 100 can be used alone or in combination to adapt to different application scenarios.
In the spiral hot direct reduced iron conveying device, the hot direct reduced iron storage tank is arranged below the shaft furnace, and the gravity blanking of the hot direct reduced iron is utilized to realize the transfer of the hot DRI, so that the lifting and climbing in the traditional DRI conveying process are reduced, and the energy consumption is reduced; the thermal state direct reduced iron storage tank can hermetically store and measure the thermal state direct reduced iron output from the bottom outlet of the shaft furnace in a heat preservation way, so that the concept of storing, measuring and conveying the thermal state DRI is realized, and the energy consumption in the conveying process is reduced; the spiral shaft structure of the spiral conveying device rotates around the central shaft to push the thermal state DRI and the smelting materials to move towards the discharge hole, so that the function of layered and synergistic charging of slagging materials and DRI is realized; the utility model discloses a simple and reliable mode has realized DRI heat transfer hot charge between shaft furnace and the electric stove, and adaptable different engineering application environment has compared in other schemes such as apron board bucket type and has simplified equipment structure greatly, has reduced engineering investment, equipment fault rate and cost of maintenance, electric stove ton steel smelting power consumption (-125 kWh/t), has improved production efficiency.
Further, as shown in fig. 2 and 3, the screw conveyor 2 includes a reduction motor 23 disposed at one end of the heat feed trough structure, the screw shaft structure 22 includes a screw shaft 221, the reduction motor 23 is connected to the screw shaft 221 through a coupling, and a screw blade 222 is disposed on a side wall of the screw shaft 221. The speed reducing motor 23 controls the rotation speed of the screw shaft 221 in a variable frequency mode, namely the feeding speed of the screw shaft structure 22 in a variable frequency mode.
In an embodiment of the present invention, as shown in fig. 5, the screw conveying device 2 is a dual-shaft screw feeding device, the number of the screw shafts 221 is two, and the two screw shafts 221 are parallel and are spaced from each other.
Further, in order to bear the high temperature of 500-800 ℃ of the thermal state DRI, the screw shaft 221 adopts a water-cooling structure, namely the screw shaft 221 is provided with a water-cooling circulation structure; the helical blade is made of heat-resistant stainless steel material.
Further, as shown in fig. 3 and 4, a sealing cover 24 capable of sealing the heat feed groove structure from the top is arranged above the heat feed groove structure 21, and a sealing bin is formed between the sealing cover 24 and the heat feed groove structure 21; the top of the sealed bin is provided with a first feeding port 241 and a second feeding port 242, the outlet of the thermal state direct reduced iron storage tank 1 is communicated with the first feeding port 241, and the second feeding port 242 is used for adding smelting materials (such as slag making materials and alloys for electric furnaces) from the high-level bin system 5. The high-level bunker system 5 inputs smelting materials (materials such as slag making materials and alloys for electric furnaces) into the hot feeding groove structure 21 through the high-temperature resistant chute and the second feeding port 242.
Further, as shown in fig. 2, a sealing gas pipe 25 is arranged in the hot feed tank structure, and the sealing gas pipe 25 is used for blowing inert gas (mostly nitrogen) into the sealing bin to reduce the secondary oxidation of the hot direct reduced iron.
Further, as shown in fig. 4, the hot trough structure 21 includes the trough bucket body 211 (can adopt the mild steel shell), sets up the heat insulating groove inside lining 212 in the trough bucket body 211, in a specific embodiment of the utility model, the hot trough structure 21 is sent by the heat-resisting stainless steel of inner face + the compound high temperature resistant heat insulating groove inside lining 212 of nanometer + mild steel shell (trough bucket body) combination preparation forms to bear the 500 ~ 800 ℃ high temperature of hot DRI, reduce thermal scattering and disappearing simultaneously.
The utility model discloses an in the embodiment, the transversal U type setting of personally submitting of groove fill body, the discharge gate sets up in the bottom of the second end of groove fill body.
Further, as shown in fig. 2 and 3, both ends of the screw shaft 221 hermetically penetrate both ends of the chute body 211, bearing seats 26 are disposed outside both ends of the chute body 211, and both ends of the screw shaft 221 are respectively hinged to the two bearing seats 26.
Further, as shown in fig. 1, the thermal state direct reduced iron storage tank 1 comprises a first tank shell (steel shell), a tank liner is arranged in the first tank shell, and the tank liner is a nano composite high temperature resistant heat insulation liner to bear the high temperature of 500-800 ℃ of the thermal state DRI and reduce the heat loss; the top of the thermal state direct reduced iron storage tank 1 is provided with a first valve 11 capable of being automatically closed, the bottom of the thermal state direct reduced iron storage tank is provided with a second valve 12 capable of being automatically closed, the thermal state direct reduced iron storage tank is communicated with a high temperature resistant slide pipe 13 through the second valve 12, and the bottom of the high temperature resistant slide pipe 13 is communicated with a first end of a hot feeding groove structure; the thermal state direct reduced iron storage tank 1 is supported and arranged on a first tank body support, and a weighing device is arranged at the bottom of the first tank body support.
The high-temperature resistant chute 13 comprises a pipe shell, a pipe lining is arranged in the pipe shell, and the pipe lining is a nano composite high-temperature resistant heat insulation lining so as to bear the high temperature of 500-800 ℃ of the thermal DRI and reduce the heat loss; the top of the high-temperature resistant chute 13 is connected with the hot direct reduced iron storage tank through a thermal expansion joint 14 so as to reduce the self thermal stress.
Adopt the utility model discloses a spiral hot state direct reduced iron conveying method, including following step:
a, step a: adding the thermal state direct reduced iron in the shaft furnace 3 into the thermal state direct reduced iron storage tank 1, and storing and metering the thermal state direct reduced iron in the thermal state direct reduced iron storage tank 1;
specifically, the bottom outlet of the shaft furnace 3 is communicated with the top of the thermal state direct reduced iron storage tank 1 through a chute, the thermal state DRI is fed into the thermal state direct reduced iron storage tank 1 by gravity, and the thermal state DRI is stored in the thermal state direct reduced iron storage tank 1 with the functions of sealing, heat preservation and weighing;
step b: adding the thermal state direct reduced iron in the thermal state direct reduced iron storage tank 1 into the spiral conveying device 2 through the high temperature resistant chute 13;
when the DRI needs to be added into the downstream electric furnace, the second valve 12 at the bottom of the hot direct reduced iron storage tank 1 is opened, and the hot DRI falls into the spiral conveying device 2 through the high-temperature resistant chute 13;
step c: starting the spiral conveying device 2 to start thermal state DRI conveying;
starting the speed reducing motor 23, driving the screw shaft 221 to rotate by the speed reducing motor 23 through the coupler, and driving the materials in the hot feeding groove structure 21 to move towards the discharge hole by the rotation of the screw blade;
step d: the high-level stock bin system 5 is started, smelting materials (materials such as slag making materials and alloys for the electric furnace) are added into the spiral conveying device 2 through the vibrating feeder (the prior art), the belt conveyor (the prior art) and the slide pipe, the smelting materials (materials such as slag making materials and alloys for the electric furnace) are mixed with the thermal state direct reduced iron in the spiral conveying device 2, and the spiral shaft structure 22 pushes the materials in the thermal feeding groove structure 21 to move towards the discharge hole and convey to the charging hopper at the top of the electric furnace.
From above, the utility model discloses a spiral hot state direct reduced iron conveyor has following beneficial effect:
in the utility model, the thermal state direct reduced iron storage tank is arranged below the shaft furnace, and the gravity blanking of the thermal state direct reduced iron is utilized to realize the transfer of the thermal state DRI, thereby reducing the lifting and climbing in the traditional DRI conveying process and reducing the energy consumption; the thermal state direct reduced iron storage tank can hermetically store and measure the thermal state direct reduced iron output from the bottom outlet of the shaft furnace in a heat-preserving way, so that the concept of storing, measuring and conveying the thermal state DRI is realized, and the energy consumption in the conveying process is reduced; a spiral shaft structure of the spiral conveying device rotates around a central shaft to push the thermal state DRI and smelting materials to move towards a discharge hole, so that the function of layered and synergistic feeding of slagging materials and DRI is realized; the utility model discloses a simple and reliable mode has realized DRI heat transfer hot charge between shaft furnace and the electric stove, and adaptable different engineering application environment has compared in other schemes such as apron board bucket type and has simplified equipment structure greatly, has reduced engineering investment, equipment fault rate and cost of maintenance, electric stove ton steel smelting power consumption (-125 kWh/t), has improved production efficiency.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications of the invention without departing from the spirit and principles of the invention should be considered within the scope of the invention.
Claims (11)
1. A spiral conveying device for hot direct reduced iron is arranged between a shaft furnace and an electric furnace and is characterized by comprising a hot direct reduced iron storage tank and a spiral conveying device; the thermal state direct reduced iron storage tank is arranged below the shaft furnace and is used for hermetically storing thermal insulation and metering thermal state direct reduced iron output from an outlet at the bottom of the shaft furnace; the spiral conveying device comprises a hot feeding groove structure arranged below the thermal state direct reduced iron storage tank, a first end of the hot feeding groove structure can be communicated with an outlet of the thermal state direct reduced iron storage tank, a second end of the hot feeding groove structure is provided with a discharge hole, and the discharge hole can be communicated with an electric furnace; the hot feeding groove structure is internally provided with a screw shaft structure, the central shaft of the screw shaft structure is arranged along the length direction of the hot feeding groove structure, and the screw shaft structure can rotationally push the materials in the hot feeding groove structure to move towards the discharge hole.
2. The screw type hot state direct reduced iron conveying apparatus according to claim 1, wherein the screw conveying apparatus comprises a reduction motor disposed at one end of a hot feed trough structure, the screw shaft structure comprises a screw shaft, the reduction motor is connected to the screw shaft through a coupling, and a screw blade is disposed on a side wall of the screw shaft.
3. The screw type hot state direct reduced iron conveying apparatus according to claim 2, wherein the number of the screw shafts is two, and the two screw shafts are arranged in parallel and spaced up and down.
4. The screw type hot state direct reduced iron conveying apparatus according to claim 2, wherein the screw shaft is of a water-cooled structure.
5. The screw type hot state direct reduced iron conveying apparatus according to claim 2, wherein the screw blades are made of heat-resistant stainless steel material.
6. The screw type hot state direct reduced iron conveying apparatus according to claim 2, wherein a sealing cover capable of sealing the hot feed chute structure from the top is provided above the hot feed chute structure, and a sealing bin is formed between the sealing cover and the hot feed chute structure; the top of the sealed bin is provided with a first feeding port and a second feeding port, the outlet of the thermal state direct reduced iron storage tank is communicated with the first feeding port, and the second feeding port is used for adding smelting materials from a high-position bin system.
7. The screw type hot state direct reduced iron conveying apparatus according to claim 6, wherein a sealing gas pipe is provided at a top of the hot feed trough structure, and the sealing gas pipe is used for blowing an inert gas into the sealing bin to reduce secondary oxidation of the hot state direct reduced iron.
8. The spiral hot state DRI conveying device according to claim 2, wherein said hot feed chute structure comprises a hopper body, and a heat insulation chute liner is provided in said hopper body.
9. The spiral hot state direct reduced iron conveying device according to claim 8, wherein the cross section of the hopper body is provided in a U shape, and the discharge port is provided at the bottom of the second end of the hopper body.
10. The screw type hot state direct reduced iron conveying apparatus according to claim 8, wherein both ends of the screw shaft are hermetically passed through both ends of the chute body, bearing blocks are provided outside both ends of the chute body, and both ends of the screw shaft are respectively hinged to both of the bearing blocks.
11. The screw type hot state direct reduced iron conveying apparatus according to claim 2, wherein the hot state direct reduced iron storage tank includes a first casing in which a tank liner is provided; the top of the thermal state direct reduced iron storage tank is provided with a first valve capable of being automatically closed, the bottom of the thermal state direct reduced iron storage tank is provided with a second valve capable of being automatically closed, the thermal state direct reduced iron storage tank is communicated with a high temperature resistant chute through the second valve, and the bottom of the high temperature resistant chute is communicated with a first end of the hot feeding groove structure; the thermal state direct reduced iron storage tank is supported and arranged on a first tank body support, and a weighing device is arranged at the bottom of the first tank body support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221349272.9U CN217438225U (en) | 2022-05-31 | 2022-05-31 | Spiral type hot direct reduced iron conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221349272.9U CN217438225U (en) | 2022-05-31 | 2022-05-31 | Spiral type hot direct reduced iron conveying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217438225U true CN217438225U (en) | 2022-09-16 |
Family
ID=83221012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221349272.9U Active CN217438225U (en) | 2022-05-31 | 2022-05-31 | Spiral type hot direct reduced iron conveying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217438225U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114921603A (en) * | 2022-05-31 | 2022-08-19 | 中冶京诚工程技术有限公司 | Spiral type hot state direct reduced iron conveying device and method |
-
2022
- 2022-05-31 CN CN202221349272.9U patent/CN217438225U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114921603A (en) * | 2022-05-31 | 2022-08-19 | 中冶京诚工程技术有限公司 | Spiral type hot state direct reduced iron conveying device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103954133B (en) | A kind of middle frequency furnace reinforced device of fluxing continuously | |
| EP2409101B1 (en) | Steel production facility | |
| CN217438225U (en) | Spiral type hot direct reduced iron conveying device | |
| KR20120069757A (en) | Method and apparatus for ironmaking using full-oxygen hydrogen-rich gas | |
| CN217438237U (en) | Scraper type hot direct reduced iron conveying device | |
| CN110388830A (en) | Scrap preheater, arc-melting equipment and pre-heating mean | |
| CN217438227U (en) | Horizontal vibration type hot direct reduced iron conveying device | |
| CN201187944Y (en) | Conveying device of high temperature direct reduced iron | |
| CN104357655A (en) | Continuous ore reduction and hot-charging steelmaking device | |
| US4251267A (en) | Method for direct reduction of metal oxide to a hot metallized product in solid form | |
| CN103333979B (en) | Electricity coal method molten point reduction iron production system and technical process thereof | |
| CN114921605A (en) | Horizontal vibration type hot direct reduced iron conveying device and method | |
| CN217438226U (en) | Drum-type hot-state direct reduced iron conveying device and electric arc furnace steelmaking system | |
| CN114921603A (en) | Spiral type hot state direct reduced iron conveying device and method | |
| CN114854932B (en) | Scraper type hot direct reduced iron conveying device and method | |
| CN202792922U (en) | Calcined short kiln | |
| CN108060283A (en) | A kind of blast furnace | |
| CN106834578A (en) | System and method associated with a kind of gas-based shaft kiln and electric furnace | |
| CN203687627U (en) | Continuous fluxing and feeding device for medium-frequency furnace | |
| CN117187467A (en) | Drum-type hot direct reduced iron conveying device and method and electric arc furnace steelmaking system | |
| CN214599218U (en) | Impurity removing mechanism for iron making | |
| CN111996021B (en) | Energy-saving environment-friendly type electric calcined coal production system | |
| CN203200287U (en) | Melting reduction iron-making system employing electricity-coal method | |
| CN110257629B (en) | Full-hot-charging production line and production process for ferromanganese production | |
| CN117187468A (en) | Device and method for hot charging and hot feeding of scrap steel and direct reduced iron in cooperation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |