CN219824259U - Low-cost large blast furnace coke throwing device - Google Patents
Low-cost large blast furnace coke throwing device Download PDFInfo
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- CN219824259U CN219824259U CN202321005219.1U CN202321005219U CN219824259U CN 219824259 U CN219824259 U CN 219824259U CN 202321005219 U CN202321005219 U CN 202321005219U CN 219824259 U CN219824259 U CN 219824259U
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- 239000000571 coke Substances 0.000 title claims abstract description 172
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 15
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 20
- 239000000463 material Substances 0.000 description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 229910052742 iron Inorganic materials 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000005194 fractionation Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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- Manufacture Of Iron (AREA)
Abstract
The utility model discloses a low-cost large blast furnace coke throwing device, which belongs to the field of iron-making equipment and comprises a coke bin, a receiving hopper, a furnace top parallel tank and a feeding system, wherein the coke bin comprises a high-price coke bin and a low-price coke bin; the high-price coke bin is one and corresponds to the main coke receiving hopper and the central coke receiving hopper; the low-price coke bin corresponds to the low-price coke receiving hopper; the furnace top parallel tank comprises a main tank and a central coke tank, and the feeding system comprises a main belt feeding assembly and a pipe belt machine feeding assembly. Compared with the prior art, the method has the characteristics of cost reduction and synergy.
Description
Technical Field
The utility model relates to iron-making equipment, in particular to a low-cost large blast furnace coke throwing device.
Background
Coke is a main raw material for blast furnace ironmaking, carbon dioxide is generated by burning the coke in a tuyere zone, heat is emitted, the heat is almost all heat sources for reducing and melting ore in the blast furnace, meanwhile, the coke also plays a role of a reducing agent and a framework support, and carbon in the coke can also enable the carbon content of pig iron to reach about 4%. However, in the prior art, the large blast furnace has to consume high-proportion high-price high-quality coke to ensure the hearth activity due to the hearth size, particularly the large hearth diameter and low hearth activity, and the low-price secondary coke has low proportion and high molten iron cost.
Therefore, in the method (CN 201610456027.0) of matching coke into a blast furnace in the blast furnace smelting process, coke is matched according to the smelting requirement according to the height sequence of indexes and added into the blast furnace; the indexes are from high to low: CSR > M > average particle size > M > ash > CRI > sulfur fraction. However, the method only uses the matching and feeding of the components, the proportion of high-price high-quality coke is high, the proportion of low-price secondary coke is low, and the cost of molten iron is high.
In the method for distributing the coke of the blast furnace (CN202210850763. X), the smooth production of the blast furnace is ensured by improving the distribution mode of the coke from the aspect of a framework channel, and the method comprises the following steps: a. screening coke granularity; b. preparing a passivating agent; step c, respectively carrying out passivation treatment according to granularity; d. different levels of passivation are placed into different intermediate cloth bins; e. and feeding by adopting a distributing device. The method has six grades of particle size grading, and has complex passivation procedure and material storage and distribution modes, and is separated from production practice.
In addition, in actual work, the central non-mining area is large, the gas utilization rate is low, the fuel consumption is high, the central air flow is thick and weak, the furnace condition fluctuation resistance is poor, and in order to ensure the central air flow, the central coke adding ratio of the large blast furnace reaches more than 20% under the condition that the large blast furnace is designed to be a parallel tank. Under the condition that the large blast furnace is designed into a series tank, the central gas flow is facilitated, but the central coke adding amount proportion is more uncontrollable, and the central coke adding position and the central coke adding amount can be calculated only according to the ring positions and the number of turns. In addition, the prior art has the defects that the central coke adding amount is unstable, the central coke adding occupies the main coke feeding flow of the main ore, an independent material distribution system is absent, a material line is easy to be fed, the central coke distribution is not centralized, and the like.
Disclosure of Invention
The technical task of the utility model is to provide a low-cost large blast furnace coke throwing device aiming at the defects of the prior art. The device of the utility model stores the materials in the sub-tank of the device, measures the materials independently, charges the materials independently by a pipe belt machine, and uses the furnace top parallel tank sequential material distribution mode as the center to add coke, thereby realizing accurate measurement and independent material feeding and creating conditions for accurate material distribution. Through the coke fractionation technology, the proportion of high-quality coke in the center is suitable, the proportion of high-quality coke in a large blast furnace is reduced, the proportion of low-quality secondary coke is increased, and the molten iron cost is greatly reduced while the stable and smooth operation of the blast furnace is ensured.
The technical scheme for solving the technical problems is as follows: the utility model provides a big blast furnace coke input device of low cost, includes coke bin, receiving hopper, furnace roof and jar and charging system, its characterized in that: the coke bin comprises a high-price coke bin and a low-price coke bin; the number of the high-price coke bins is one, and the two corresponding receiving hoppers, the main coke receiving hopper and the central coke receiving hopper are respectively used for adding Jiao Beiliao to the main coke Jiao Beiliao and the center; the low-price coke bin corresponds to the low-price coke receiving hopper; the furnace top parallel tank comprises a main tank and a central coke tank; the feeding system comprises a main belt feeding assembly and a pipe belt machine feeding assembly; the main belt feeding assembly comprises a main belt, wherein a main coke receiving hopper and a low-price coke receiving hopper are arranged on the upstream of the main belt, a main tank receiving hopper on the top of the furnace is arranged on the downstream of the main belt, and a main tank is arranged below the main tank receiving hopper; the independent pipe belt of the pipe belt machine feeding assembly is parallel to the main belt of the main belt feeding assembly, the upstream of the independent pipe belt is a high-price coke bin, the downstream of the independent pipe belt is a central coke receiving hopper of the furnace top, and the lower part of the central coke receiving hopper is a central coke tank.
Further, the number of the low-price coke bins corresponds to three low-price coke receiving hoppers.
In the optimization scheme, each receiving hopper is internally provided with an independent weighing device.
Further, the number of the main tanks is two, namely a first main tank and a second main tank.
Further, the central coke tank is positioned between the first main tank and the second main tank; the blanking port of the central coke tank is arranged between the blanking port of the first main tank and the blanking port of the second main tank.
Further, the central coke tank, the first main tank and the second main tank are arranged in an isosceles triangle.
Compared with the prior art, the utility model has the following outstanding beneficial effects:
1. according to the device, the under-tank sub-bin storage and independent metering are realized, the pipe belt machine is used for independent feeding, the furnace top parallel tank sequential material distribution mode is used for central coke adding, the accurate metering and independent feeding are realized, and conditions are created for accurate material distribution;
2. the utility model reduces the proportion of high-price high-quality coke of a large blast furnace, increases the proportion of low-price secondary coke, and greatly reduces the cost of molten iron;
3. the utility model reduces the cost of molten iron and maintains the stable and smooth operation of the blast furnace.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
The utility model is further described below with reference to the drawings and the detailed description. Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in numerous different ways without departing from the spirit or scope of the embodiments of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the following embodiments, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," "end," "side," and the like are directional or positional relationships as indicated based on the drawings, merely to facilitate describing and simplifying the description of the embodiments of the present utility model, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the present utility model.
As shown in fig. 1, the utility model is a low-cost large blast furnace coke throwing device.
Comprising the following steps: coke bin, receiving hopper, furnace top and tank and feeding system. The feeding system comprises a main belt feeding assembly and a pipe belt machine feeding assembly. An independent weighing device is arranged in each receiving hopper.
The utility model adopts the under-groove sub-bin storage: the coke bin comprises a high-price coke bin and a low-price coke bin.
The number of the high-price coke bins is one, and the main coke receiving hopper and the central coke receiving hopper 3 are respectively used for adding Jiao Beiliao to the main coke Jiao Beiliao and the center. In the prior art, the furnace top of an external factory is mostly a serial tank, and the central coke adding and the main coke are mixed together for feeding, so that an independent weighing device is not arranged under a tank, the central coke adding amount Jiao Jiajiao is determined according to the central coke distribution ring number ratio, and the coke adding method is inaccurate.
The three low-price coke bins are used for storing low-price secondary coke and correspond to one low-price coke receiving hopper respectively.
The furnace top parallel tank comprises a main tank 6 and a central coke tank 4, wherein the main tank 6 is a large tank, and the central coke tank 4 is a small tank.
The feeding system comprises a main belt feeding assembly and a pipe belt machine feeding assembly.
The main belt feeding assembly comprises a main belt 1, wherein a main coke receiving hopper and a low-price coke receiving hopper are arranged on the upstream of the main belt 1, a main tank receiving hopper 5 is arranged on the downstream of the main belt, and a main tank 6 is arranged below the main tank receiving hopper 5 and is used for feeding main ores (containing coke butyl) and main coke.
The independent pipe belt 2 of the pipe belt machine feeding assembly is parallel to the main belt 1 of the main belt feeding assembly, the upstream of the independent pipe belt 2 is a high-price coke bin, the downstream of the independent pipe belt 2 is a central coke receiving hopper 3 at the top of the furnace, and the lower part of the central coke receiving hopper 3 is a central coke tank 4 which is specially used for feeding central coke. In the prior art, a single main belt is used for feeding, a feeding process is occupied, and a stockline is easy to be fed. The receiving hoppers are distributed in a short-range mode and a long-range mode, weighing is facilitated to be more accurate, the central coke receiving hopper 3 and the central coke tank 4 are distributed in a short-range mode, weighing can be more accurate, the main coke receiving hopper, the low-price coke receiving hopper and the main tank 6 are distributed in a long-range mode, top space is saved conveniently, and Jiao Jiakuang is added rapidly. The ratio of high-and low-price cokes fed to the main drum is based on site demand and is related to the coke composition and will not be discussed further herein.
In the optimized scheme, the furnace top parallel tank is three charging tanks which are arranged in an isosceles triangle, a first main tank and a second main tank are arranged at two sides, and a central coke tank 4 is arranged in the middle. The first main tank and the second main tank in fig. 1 are coincident in front-to-back position. The blanking mouth of the central coke tank 4 is between the blanking mouth of the first main tank and the blanking mouth of the second main tank. The first main tank and the second main tank are alternately subjected to main coke and main ore, so that the problem of material distribution segregation caused by tank combination can be avoided.
The application steps of the utility model include:
1. coke fractionation
The coke is divided into high-price high-quality coke and low-price secondary coke, wherein the high-price high-quality coke is top-loading primary dry quenching coke, and other cokes are defined as low-price secondary cokes. Simplifying the coke fractionation criteria.
Coke is stored in sub-tank bins: high-price high-quality coke is stored in a high-price coke bin, and low-price secondary coke is stored in a low-price coke bin. The high-price high-quality coke plays a role of a material column framework; the secondary coke has the functions of heating, carburizing and reducing, improves the ore reduction and heat demand in the edge area, protects the furnace lining, plays the heat insulation effect and promotes the stable and smooth operation of the blast furnace.
2. Furnace top tank-merging sequential distribution
The furnace top parallel tanks are three charging tanks which are arranged in an isosceles triangle, a first main tank and a second main tank are arranged at two sides, and a central coke tank 4 is arranged in the middle. The first main tank and the second main tank in fig. 1 are coincident in front-to-back position. The blanking mouth of the central coke tank 4 is between the blanking mouth of the first main tank and the blanking mouth of the second main tank. The first main tank and the second main tank are alternately subjected to main coke and main ore, so that the problem of material distribution segregation caused by tank combination can be avoided.
The cloth is distributed according to the sequence of main coke, central coke, ore, central coke and ore.
The material is not discharged when the center coke is distributed, so that the time is saved.
According to different equipment of different blast furnaces, the central coke adding angles are different, and the key is that the central coke is not required to pass through the chute and be contacted with the lacing wires at the front end of the chute, so that the central coke is intensively distributed to a central area. In this example, the center focus was distributed at 3 °.
The furnace top three-tank sequential material distribution mode can still effectively ensure that the center is mineral-free under the condition of low center coke addition, and the center coke addition is only 10-27% of the prior art.
3. Central coke adding amount control
The coke adding amount of the control center is less than 5% of the coke batch weight.
The following table shows the prior art (comparative example), sequential distribution process scheme (examples 1-3) distribution mode comparison:
the following table shows the prior art and the device, the prior art + the device of the utility model, the sequential distribution process + the device of the utility model after the large blast furnace is opened, wherein the prior art is a parallel tank (coke tank, ore tank), and the prior art is the sequential distribution of 'main coke- & gtcenter coke- & lt ore'.
| Coefficient of utilization | Fuel ratio kg/t | Coal ratio kg/t | High-price high-quality coke proportion | Low secondary coke ratio | |
| Original technology and original device | 2.301 | 564.9 | 152.7 | 76.73％ | 23.27％ |
| Original technique + the utility model | 2.532 | 523.2 | 159.2 | 34.45％ | 65.55％ |
| Sequential distribution process + device of the utility model | 2.608 | 487.6 | 168.0 | 22.66％ | 77.34％ |
As can be seen from the data in the table, by adopting the sequential material distribution process and the device of the utility model, the high-quality coke (top-loading dry quenching) of the blast furnace is reduced to 22.66 percent, and the fuel is reduced to 487.6kg/t while the central coke adding amount is reduced to 2.2 percent; at the same time, the utilization coefficient is improved. The device of the utility model can reduce the proportion of high-price high-quality coke and improve the utilization coefficient.
Because the mining coal for the large and small blast furnaces has consistent structure, the difference of the molten iron cost is mainly in the aspect of coke. The main difference in coke aspect is the high price and high quality coke proportion, and the molten iron cost is greatly reduced through the sequential material distribution process and the device of the utility model.
It is noted that while the present utility model has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various modifications can be made therein without departing from the spirit and scope thereof.
Claims (6)
1. The utility model provides a big blast furnace coke input device of low cost, includes coke bin, receiving hopper, furnace roof and jar and charging system, its characterized in that:
the coke bin comprises a high-price coke bin and a low-price coke bin; the number of the high-price coke bins is one, and the two corresponding receiving hoppers, the main coke receiving hopper and the central coke receiving hopper are respectively used for adding Jiao Beiliao to the main coke Jiao Beiliao and the center;
the low-price coke bin corresponds to the low-price coke receiving hopper;
the furnace top parallel tank comprises a main tank and a central coke tank;
the feeding system comprises a main belt feeding assembly and a pipe belt machine feeding assembly; the main belt feeding assembly comprises a main belt, wherein a main coke receiving hopper and a low-price coke receiving hopper are arranged on the upstream of the main belt, a main tank receiving hopper on the top of the furnace is arranged on the downstream of the main belt, and a main tank is arranged below the main tank receiving hopper; the independent pipe belt of the pipe belt machine feeding assembly is parallel to the main belt of the main belt feeding assembly, the upstream of the independent pipe belt is a high-price coke bin, the downstream of the independent pipe belt is a central coke receiving hopper of the furnace top, and the lower part of the central coke receiving hopper is a central coke tank.
2. The low cost large blast furnace coke dispensing apparatus of claim 1, wherein: the number of the low-price coke bins corresponds to three low-price coke receiving hoppers.
3. The low cost large blast furnace coke dispensing apparatus of claim 1, wherein: an independent weighing device is arranged in each receiving hopper.
4. The low cost large blast furnace coke dispensing apparatus of claim 1, wherein: the number of the main tanks is two, namely a first main tank and a second main tank.
5. The low cost large blast furnace coke dispensing apparatus of claim 1, wherein: the central coke tank is positioned between the first main tank and the second main tank; the blanking port of the central coke tank is arranged between the blanking port of the first main tank and the blanking port of the second main tank.
6. The low cost large blast furnace coke dispensing apparatus of claim 1, wherein: the central coke tank, the first main tank and the second main tank are arranged in an isosceles triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321005219.1U CN219824259U (en) | 2023-04-28 | 2023-04-28 | Low-cost large blast furnace coke throwing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321005219.1U CN219824259U (en) | 2023-04-28 | 2023-04-28 | Low-cost large blast furnace coke throwing device |
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| Publication Number | Publication Date |
|---|---|
| CN219824259U true CN219824259U (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321005219.1U Active CN219824259U (en) | 2023-04-28 | 2023-04-28 | Low-cost large blast furnace coke throwing device |
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| Country | Link |
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| CN (1) | CN219824259U (en) |
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2023
- 2023-04-28 CN CN202321005219.1U patent/CN219824259U/en active Active
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