CN221371204U - Fine mineral powder blowing device of smelting reduction furnace - Google Patents
Fine mineral powder blowing device of smelting reduction furnace Download PDFInfo
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- CN221371204U CN221371204U CN202322873050.8U CN202322873050U CN221371204U CN 221371204 U CN221371204 U CN 221371204U CN 202322873050 U CN202322873050 U CN 202322873050U CN 221371204 U CN221371204 U CN 221371204U
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- fine
- mineral powder
- smelting reduction
- fine mineral
- reduction furnace
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- 239000000843 powder Substances 0.000 title claims abstract description 110
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 78
- 239000011707 mineral Substances 0.000 title claims abstract description 78
- 238000007664 blowing Methods 0.000 title claims abstract description 54
- 238000003723 Smelting Methods 0.000 title claims abstract description 24
- 230000009467 reduction Effects 0.000 title claims abstract description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 238000005243 fluidization Methods 0.000 claims description 14
- 238000005303 weighing Methods 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 4
- 238000005453 pelletization Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 12
- 238000001035 drying Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Furnace Charging Or Discharging (AREA)
Abstract
The utility model provides a smelting reduction furnace fine mineral powder jetting device, includes fine mineral powder storehouse (1), jetting jar (2), joint ball valve (8), fine powder returns bin pipeline (9) and screw feeder (11), and the export in fine mineral powder storehouse (1) links to each other with the entry of jetting jar (2) through joint ball valve (8), and the jetting jar export links to each other the jetting pipeline through screw feeder (11), is provided with fine powder between jetting jar (2) and the fine mineral powder storehouse (1) and returns bin pipeline (9). The utility model ensures that the recycled fine mineral powder does not need pelletizing for matching, does not influence the working condition of a smelting reduction system during blowing, has simple design and simplified process flow, and is safe and reliable.
Description
Technical Field
Embodiments of the present disclosure relate generally to the field of iron and steel smelting, and more particularly, to a fine ore powder injection apparatus of a smelting reduction furnace.
Background
The MPR smelting reduction technology generally adopts the technology of injecting mineral powder and coal powder into an MPR furnace to reduce and produce high-purity molten iron. Before the mineral powder is blown, the mineral powder needs to be dried in a drying kiln. The drying process can produce a large amount of fine mineral powder with granularity less than 0.5mm, the fine mineral powder is recovered through gravity dust removal, cyclone dust removal, multi-tube dust removal and cloth bag dust removal in sequence, and the fine mineral powder is mixed into raw mineral powder again after pelletizing, dried and crushed, and then mixed and blown. However, the recycling method has poor effect, and firstly affects the working condition of the system, such as slag bonding of the waste heat boiler, and secondly has high pelletizing cost. Therefore, the application provides a fine mineral powder injection device of a smelting reduction furnace, wherein the fine mineral powder is directly injected after being recovered without re-matching balls.
Disclosure of utility model
The utility model aims to provide a fine mineral powder blowing device of a smelting reduction furnace, which solves the problem of poor effect of the current recycling method.
In order to solve the technical problems, the utility model adopts the following technical scheme:
The utility model provides a smelting reduction furnace fine mineral powder jetting device, includes fine mineral powder storehouse 1, jetting jar 2, joint ball valve 8, fine powder returns storehouse pipeline 9 and screw feeder 11, and the export in fine mineral powder storehouse 1 links to each other with the entry of jetting jar 2 through joint ball valve 8, and the jetting jar export passes through screw feeder 11 hookup jetting pipeline, is provided with fine powder between jetting jar 2 and the fine mineral powder storehouse 1 and returns storehouse pipeline 9.
Further, the device also comprises a pressure equalizing pipeline 10, wherein the pressure equalizing pipeline 10 is arranged between the fine mineral powder bin and the blowing tank and between the blowing tank and the screw feeder.
Further, a feed inlet 3 is arranged above the fine mineral powder bin 1.
Further, the fine mineral powder bin 1 is provided with a first level gauge 41 and a first weighing device 51, and the blowing tank 2 is provided with a second level gauge 42 and a second weighing device 52.
Further, 1-2 first air cannons 61 are arranged at the lower part of the fine mineral powder bin 1, 1-2 second air cannons 62 are arranged at the lower part of the blowing tank 2, and when blocking occurs, blocking can be removed through the air cannons.
Further, the lower part of the fine mineral powder bin 1 is provided with three rows of first nitrogen fluidization devices 71, and the lower part of the blowing tank 2 is provided with three rows of second nitrogen fluidization devices 72, which are respectively used for pre-fluidizing and final-fluidizing the fine mineral powder.
Further, the volume of the fine mineral powder bin 1 is 80-120 m 3, 2 blowing tanks 2 are arranged, and each volume is 20-30 m 3.
Further, 1-2 fine powder return pipelines 9 are arranged between the blowing tank 2 and the fine powder bin 1.
The utility model has the advantages and effects that: after the fine mineral powder is recovered, the fine mineral powder is directly blown by a fine mineral powder blowing device, and is returned to the coarse mineral powder for re-drying and crushing after no pelletizing; meanwhile, as the fine mineral powder is finer than the crushed mineral powder dried by the existing device, the specific surface area is larger, the smelting reduction speed is increased during blowing, the reaction is sufficient, the working condition of a smelting reduction system is not influenced, the design is simple, the cost is reduced, the process flow is simplified, and the safety and the reliability are realized.
Drawings
FIG. 1 is a schematic diagram of a fine mineral powder blowing device of the smelting reduction furnace.
Wherein: 1. the fine mineral powder bin 2, the blowing tank 3, the first feed inlet 41, the first level gauge 51, the first weighing device 61, the first air cannon 71, the first nitrogen fluidization device 42, the second level gauge 52, the second weighing device 62, the second air cannon 72, the second nitrogen fluidization device 8, the joint ball valve 9, the fine powder return bin pipeline 10, the pressure equalizing pipeline 11 and the screw feeder.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model are clearly and completely described below. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.
The technical scheme of the present utility model is further explained and illustrated below with reference to specific examples.
A fine mineral powder injection device of a smelting reduction furnace comprises a fine mineral powder bin 1, an injection tank 2, a joint ball valve 8, a fine powder return bin pipeline 9, a pressure equalizing pipeline 10 and a screw feeder 11. The fine mineral powder less than 0.5mm recovered by gravity dust removal, cyclone dust removal, multitube dust removal and cloth bag dust removal of the drying kiln is fed into the bin through a pipeline from a feed inlet of the fine mineral powder bin 1 for storage. The fine ore powder bin outlet is connected with the inlet of the blowing tank 2 through a joint ball valve 8, and the blowing tank outlet is connected with a blowing pipeline (not shown in the figure) through a screw feeder 11.
The volume of the fine mineral powder bin is 80-120 m 3, 2 blowing tanks are arranged, and each volume is 20-30 m 3.
The fine ore powder bin is provided with a material level gauge 41 and a weighing device 51. When the fine mineral powder bin is over 95 percent or less than 20 percent of mineral powder, a high material level alarm or a low material level alarm is triggered to remind an operator to stop feeding or feed in time. The weighing device is used for weighing the fine mineral powder bin and the fine mineral powder entering the blowing tank.
The blowing tank is provided with a level gauge 42 and a weighing device 52. When the blowing tank is over 90 percent or less than 20 percent of mineral powder, a high material level alarm or a low material level alarm is triggered to remind an operator to stop feeding or feed in time. The weighing device is used for weighing the weight of the blowing tank and the fine mineral powder entering the blowing pipeline.
The lower part of the fine mineral powder bin 1 is provided with 1-2 first air cannons 61, the lower part of the blowing tank 2 is provided with 1-2 second air cannons 62, and when blocking occurs, blocking can be removed through the air cannons.
The lower part of the fine mineral powder bin is provided with three rows of first nitrogen fluidization devices 71, and the lower part of the blowing tank is provided with three rows of second nitrogen fluidization devices 72 which are respectively used for pre-fluidizing and final fluidizing the fine mineral powder, so that the blowing effect is ensured. Wherein each row of fluidization devices of the fine mineral powder bin is provided with 9 fluidization holes, and each row of fluidization devices of the blowing tank is provided with 6 fluidization holes.
The feeding, pressure equalizing and continuous blowing of the blowing tank are controlled by the combined ball valve 8 of the fine mineral powder bin and the blowing tank.
The pressure equalizing pipeline 10 between the fine mineral powder bin and the blowing tank and between the blowing tank and the screw feeder is used for adjusting the pressure difference between the fine mineral powder bin and the blowing tank as well as between the blowing tank and the screw feeder, so that smooth feeding and discharging of the blowing tank are ensured.
1-2 Fine powder return pipelines are arranged between the blowing tank and the fine mineral powder bin. During maintenance or when necessary, the pressure difference between the blowing tank and the fine ore bin can be adjusted through the pressure equalizing line 10, so that the remaining ore powder in the blowing tank is pumped back to the fine ore bin through the fine powder return line 9.
Example 1
A fine mineral powder injection device of a smelting reduction furnace comprises a fine mineral powder bin 1, an injection tank 2, a joint ball valve 8, a fine powder return bin pipeline 9, a pressure equalizing pipeline 10 and a screw feeder 11. The volume of the fine mineral powder bin is 100m 3, and the volume of the blowing tank is 20m 3.
Fine mineral powder collected by gravity dust removal, cyclone dust removal, multi-tube dust removal and cloth bag dust removal of the drying kiln enters a feed inlet 3 of a fine mineral powder bin 1 through a pipeline and enters the bin for storage. When the level gauge 41 on the fine mineral powder bin gives an alarm at a high position, the feeding is stopped, and the weighing device 51 displays the weight 171.389t of the fine mineral powder. The combined ball valve 8 is opened, nitrogen in the blowing tank 2 enters the fine mineral powder bin 1 through the equalizing pipe 10, the gas pressure in the fine mineral powder bin 1 is not smaller than that of the blowing tank 2, meanwhile, the first nitrogen fluidization device 71 on the fine mineral powder bin fluidizes mineral powder in the fine mineral powder bin, and the mineral powder flows into the blowing tank 2 from the fine mineral powder bin 1 under the action of gravity.
When the level gauge 42 on the blowing tank 2 gives an alarm at a high position, the weighing device 52 displays that the weight of fine mineral powder in the blowing tank is 32.478t, the combined ball valve 8 is closed, and the feeding is stopped. During blowing, the feed opening of the blowing tank is opened, nitrogen enters the blowing tank through the equalizing pipeline 10 to equalizing pressure, meanwhile, the second nitrogen fluidization device 72 on the blowing tank fluidizes mineral powder in the blowing tank, and the mineral powder flows into the screw feeder 11 from the blowing tank 2 under the action of gravity and is continuously sprayed into the smelting reduction furnace through the blowing pipeline.
Although the embodiments of the present utility model are described above, the embodiments are only used for facilitating understanding of the present utility model, and are not intended to limit the present utility model. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is to be determined by the appended claims.
Claims (8)
1. The utility model provides a smelting reduction furnace fine mineral powder jetting device, its characterized in that includes fine mineral powder storehouse (1), jetting jar (2), joint ball valve (8), fine powder returns storehouse pipeline (9) and screw feeder (11), and the export in fine mineral powder storehouse (1) links to each other with the entry of jetting jar (2) through joint ball valve (8), and the jetting jar export links to each other the jetting pipeline through screw feeder (11), is provided with fine powder between jetting jar (2) and fine mineral powder storehouse (1) and returns storehouse pipeline (9).
2. The fine ore powder injection apparatus of a smelting reduction furnace according to claim 1, further comprising a pressure equalizing line (10), wherein the pressure equalizing line (10) is provided between the fine ore powder bin and the injection tank, and between the injection tank and the screw feeder.
3. The fine ore powder injection device of the smelting reduction furnace according to claim 2, wherein a feed port (3) is provided above the fine ore powder bin (1).
4. A fine ore powder injection device of a smelting reduction furnace according to claim 3, characterized in that the fine ore powder bin (1) is provided with a first level gauge (41) and a first weighing device (51), respectively, and the injection tank (2) is provided with a second level gauge (42) and a second weighing device (52), respectively.
5. The fine mineral powder blowing device of the smelting reduction furnace according to claim 4, wherein 1-2 first air cannons (61) are arranged at the lower part of the fine mineral powder bin (1), 1-2 second air cannons (62) are arranged at the lower part of the blowing tank (2), and when blocking occurs, blocking can be removed through the air cannons.
6. The fine ore powder injection device of the smelting reduction furnace according to claim 5, wherein three rows of first nitrogen fluidization devices (71) are arranged at the lower part of the fine ore powder bin (1), and three rows of second nitrogen fluidization devices (72) are arranged at the lower part of the injection tank (2) for respectively pre-fluidizing and final fluidizing the fine ore powder.
7. The fine ore powder injection apparatus of a smelting reduction furnace according to claim 6, wherein the fine ore powder bin (1) has a volume of 80 to 120m 3, and 2 injection tanks (2) are provided, each having a volume of 20 to 30m 3.
8. The fine ore powder injection apparatus of a smelting reduction furnace according to claim 7, wherein 1-2 fine ore powder return pipelines (9) are provided between the injection tank (2) and the fine ore powder bin (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322873050.8U CN221371204U (en) | 2023-10-25 | 2023-10-25 | Fine mineral powder blowing device of smelting reduction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322873050.8U CN221371204U (en) | 2023-10-25 | 2023-10-25 | Fine mineral powder blowing device of smelting reduction furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221371204U true CN221371204U (en) | 2024-07-19 |
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ID=91868912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322873050.8U Active CN221371204U (en) | 2023-10-25 | 2023-10-25 | Fine mineral powder blowing device of smelting reduction furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221371204U (en) |
-
2023
- 2023-10-25 CN CN202322873050.8U patent/CN221371204U/en active Active
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