CN117126971A - Operation method of blast furnace Gao Peibi raw ore - Google Patents
Operation method of blast furnace Gao Peibi raw ore Download PDFInfo
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- CN117126971A CN117126971A CN202311131203.XA CN202311131203A CN117126971A CN 117126971 A CN117126971 A CN 117126971A CN 202311131203 A CN202311131203 A CN 202311131203A CN 117126971 A CN117126971 A CN 117126971A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000009826 distribution Methods 0.000 claims abstract description 123
- 239000000571 coke Substances 0.000 claims abstract description 95
- 238000012216 screening Methods 0.000 claims abstract description 8
- 239000008188 pellet Substances 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000009423 ventilation Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 229910052742 iron Inorganic materials 0.000 description 7
- 239000004744 fabric Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
-
- 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
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention belongs to the technical field of blast furnace ironmaking, and discloses an operation method of Gao Peibi raw ore of a blast furnace, which comprises the following steps: s1, selecting and screening raw ore, sintered ore, ball ore and coke according to granularity size of the ore and the coke respectively; s2, presetting a blast furnace distribution gear and a distribution angle, wherein the ore gear is N grades, and the ore distribution angle comprises a minimum ore distribution angle and a maximum ore distribution angle; the coke gear is an n+2 gear, and the coke distribution angle comprises a minimum coke distribution angle and a maximum coke distribution angle, wherein the minimum coke distribution angle is smaller than the minimum ore distribution angle, and the maximum coke distribution angle is larger than the maximum ore distribution angle; s3, distributing ore and coke in the blast furnace in sequence according to the distribution gear and the distribution angle of the blast furnace. The operation method of the blast furnace Gao Peibi raw ore can reasonably allocate raw ore, sintered ore and ball ore, control granularity, promote the ventilation of a material column, ensure the normal and reasonable distribution of air flow and promote economic benefit.
Description
Technical Field
The invention relates to the technical field of blast furnace ironmaking, in particular to an operation method of Gao Peibi raw ore of a blast furnace.
Background
Raw materials used in blast furnace ironmaking are mainly divided into clinker and raw materials, wherein the clinker comprises sinter and ball ore, and the raw ore belongs to raw materials, namely natural ore which is crushed into a certain small particle size after natural exploitation. Compared with sinter and ball ore, the raw ore has obvious cost advantage, but the smelting performance is slightly poor. The highest proportion of raw ore used in blast furnace ironmaking in China is about 25%, and if the proportion of raw ore fed into the furnace is further increased, the fluctuation of the furnace condition of the blast furnace is frequent, and the economic index is poor.
Under the prior art condition, the use proportion of the raw ore is difficult to improve, and the main problem is that a blast furnace technician does not find a blast furnace operation method of the high-proportion raw ore, and the configuration process is imperfect. The main aspects are as follows: when the high-proportion raw ore is used, the preparation among the raw ore, the sintered ore and the ball ore is unreasonable, so that the pressure in the furnace is greatly increased after a large amount of raw ore enters the blast furnace, and the furnace condition is uneven; the granularity control among the raw ore, the sintered ore and the ball ore is unreasonable, and the ventilation of a material column in the furnace is poor after the raw ore enters the furnace, so that the blast furnace is unsmooth; the chemical component content of the raw ore is unstable, the iron content is low, the content of harmful elements is high, the temperature field in the furnace changes after a large amount of raw ore is charged into the furnace, and the blast furnace gas flow distribution is abnormal, so that the blast furnace is not smooth; the high proportion of raw ore results in unreasonable gas flow distribution inside the blast furnace.
Disclosure of Invention
The invention aims to provide an operation method of blast furnace Gao Peibi raw ore, which can reasonably allocate raw ore, sintered ore and ball ore, control granularity, promote the ventilation of a material column, ensure the normal and reasonable distribution of air flow and promote economic benefit.
To achieve the purpose, the invention adopts the following technical scheme:
provided is an operation method of a blast furnace Gao Peibi raw ore, comprising the following steps:
s1, respectively screening ore and coke according to particle size, respectively feeding the ore and the coke with the same particle size into a blast furnace bin, wherein the ore comprises raw ore, sintered ore and pellet, and respectively screening the raw ore, the sintered ore and the pellet;
s2, presetting a blast furnace distribution gear and a distribution angle, wherein the gear comprises an ore gear and a coke gear, the distribution angle comprises an ore distribution angle and a coke distribution angle, the ore gear comprises an N gear, each ore grade corresponds to different ore distribution angles, and the ore distribution angles comprise a minimum ore distribution angle and a maximum ore distribution angle; the coke gear comprises an N+2 gear, each coke grade corresponds to different coke distribution angles, each coke distribution angle comprises a minimum coke distribution angle and a maximum coke distribution angle, wherein the minimum coke distribution angle is smaller than the minimum ore distribution angle, and the maximum coke distribution angle is larger than the maximum ore distribution angle;
and S3, distributing the ore and the coke in the blast furnace in sequence according to the distribution gear and the distribution angle of the blast furnace.
As a preferred embodiment of the present invention, in the step S1, the particle size of the raw ore, the sintered ore and the coke is divided into four kinds in total, wherein one kind includes 26mm to 35mm, one kind includes 36mm to 45mm, three kinds includes 46mm to 60mm, four kinds include more than 60mm, and the particle size of the ball ore includes 10mm to 20mm.
As a preferred embodiment of the present invention, in the step S2, the ore gear includes 6 th to 10 th and the coke gear includes 8 th to 12 th.
As a preferred embodiment of the present invention, in the step S2, the ore distribution angle sequentially increases as the ore shift position becomes larger; and/or, as the coke gear becomes larger, the coke distribution angle sequentially increases.
As a preferred embodiment of the present invention, in the step S2, the minimum coke distribution angle is smaller than the minimum ore distribution angle by 1 ° and the maximum coke distribution angle is larger than the maximum ore distribution angle by 1 °.
As a preferred embodiment of the present invention, the method further comprises the following steps before said step S3: confirming the total weight of the ore and the weight proportion of each of the raw ore, the sintered ore and the pellet ore;
in the step S3, the raw ore, the sintered ore and the pellet ore are weighed according to the weight ratio, and half of the sintered ore, all of the raw ore, the other half of the sintered ore and all of the pellet ore are distributed into the blast furnace in sequence.
In a preferred embodiment of the present invention, in the step S3, when the ore and the coke are distributed in the blast furnace, the main belt at the top of the blast furnace gradually moves from the center of the blast furnace toward the wall of the blast furnace and is distributed.
As a preferred embodiment of the present invention, in the step S3, when the weight ratio of the raw ore is greater than 40%, a plurality of reinforcing bars are added, and half of the sintered ore, the plurality of reinforcing bars, all of the raw ore, the other half of the sintered ore, and all of the ball ore are sequentially distributed into the blast furnace.
As a preferred embodiment of the present invention, in the step S3, the following steps are further included: and detecting the binary basicity of the slag, and adjusting the weight proportion or adding silica and/or dolomite into the blast furnace when the binary basicity of the slag does not meet preset standards.
As a preferred embodiment of the present invention, the step S3 further includes the following steps: the length of the tuyere small sleeve of the blast furnace is variable, and the length of the tuyere small sleeve is correspondingly increased along with the increase of the weight proportion of the raw ore.
The invention has the beneficial effects that:
according to the method for operating the blast furnace Gao Peibi raw ore, through the grading arrangement of the ores and the cokes with the same granularity and the size, the maximum porosity and uniform gaps of a material column formed after material distribution can be ensured, the air permeability among the raw ore, the sintered ore, the ball ore and the cokes is increased, the blast furnace gas flow is smoother, the great increase of the internal pressure of the blast furnace is avoided, and the furnace condition is smoother; the coke gear is 2 gears more than the ore gear, the minimum gear corresponds to enabling the minimum coke distribution angle to be smaller than the minimum ore distribution angle, and the maximum gear corresponds to enabling the maximum coke distribution angle to be larger than the maximum ore distribution angle. Like this, the coke cloth can cover ore cloth completely, even if use big ratio raw ore, its raw ore iron content is low and harmful element content is high, the coke is as the important reductant of blast furnace internal reduction reaction, can provide the reducing gas under the high temperature all the time, help forming top melting iron fillings and dregs in the blast furnace, do benefit to the smooth flow of blast furnace internal material and gas, provide stable heat, stable carbon content and stable reductant for the furnace condition is comparatively smooth, can improve raw ore proportion to about 40%, is showing and is promoting economic benefits.
Drawings
Fig. 1 is a schematic flow chart of an operation method of a blast furnace Gao Peibi raw ore provided in an embodiment of the invention;
fig. 2 is a schematic flow chart of an operation method of a blast furnace Gao Peibi raw ore provided in the second embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; 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 present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
Example 1
As shown in fig. 1, a first embodiment of the present invention provides an operation method of a blast furnace Gao Peibi raw ore, the operation method of the blast furnace Gao Peibi raw ore includes the following steps:
s1, selecting and screening ores and cokes according to the granularity, respectively sending the ores and cokes with the same granularity into a blast furnace bin, wherein the ores comprise raw ores, sintered ores and ball ores, and respectively selecting and screening the raw ores, the sintered ores and the ball ores. In the step, through the grading configuration of ores and cokes with the same granularity and size, the maximum porosity and uniform gaps of a material column formed after material distribution can be ensured, the air permeability among raw ore, sintered ore, ball ore and coke is increased, the blast furnace gas flow is smoother, the internal pressure of the blast furnace is prevented from being greatly increased, and the furnace condition is smoother;
s2, presetting a blast furnace distribution gear and a distribution angle, wherein the gear comprises an ore gear and a coke gear, the distribution angle comprises an ore distribution angle and a coke distribution angle, the ore gear comprises an N gear, each ore grade corresponds to different ore distribution angles respectively, and the ore distribution angle comprises a minimum ore distribution angle and a maximum ore distribution angle; the coke gear comprises an N+2 gear, each coke grade corresponds to different coke distribution angles respectively, each coke distribution angle comprises a minimum coke distribution angle and a maximum coke distribution angle, wherein the minimum coke distribution angle is smaller than the minimum ore distribution angle, and the maximum coke distribution angle is larger than the maximum ore distribution angle.
In this step, the ore gear and the coke gear represent different distribution states of the furnace top main belt, when the size of the furnace top space of the blast furnace is fixed, the distribution angle of the furnace top main belt to the center of the blast furnace is minimum, and when the distribution gear is increased, the distribution angle is correspondingly increased until the distribution angle of the furnace top main belt to the periphery of the edge of the blast furnace is maximum. The minimum coke burden distribution angle is made smaller than the minimum ore burden distribution angle, and the maximum coke burden distribution angle is greater than the maximum ore burden distribution angle, i.e., the coke gear is 2 gears more than the ore gear, the minimum gear corresponds to making the minimum coke burden distribution angle smaller than the minimum ore burden distribution angle, and the maximum gear corresponds to making the maximum coke burden distribution angle greater than the maximum ore burden distribution angle. Like this, the coke cloth can cover ore cloth completely, even if use big ratio raw ore, its raw ore iron content is low and harmful element content is high, and the coke is as the important reductant of blast furnace internal reduction reaction, can provide the reducing gas under the high temperature all the time, helps forming top melting iron fillings and dregs in the blast furnace, does benefit to the smooth flow of blast furnace interior material and gas, provides stable heat, stable carbon content and stable reductant for the furnace condition is comparatively smooth.
And S3, distributing ore and coke in the blast furnace in sequence according to the distribution gear and the distribution angle of the blast furnace.
The operation method of the blast furnace Gao Peibi ore production provided by the embodiment of the invention can improve the ore production proportion to about 40%, and remarkably improve the economic benefit.
Optionally, the method further comprises the following steps before step S1: raw material quality screening is carried out on ores and cokes, and superior raw ores are used, wherein in the embodiment, the iron content in the raw ores is required to be more than or equal to 65%, the SiO2 content in the raw ores is less than or equal to 3%, the Al2O3 content in the raw ores is less than or equal to 1.0%, the S content in the raw ores is less than or equal to 0.5%, the MnO content in the raw ores is less than or equal to 0.5%, the CaO content in the raw ores is more than 1%, and the MgO content in the raw ores is more than 1%. Of course, the above contents are merely examples, and the present embodiment is not particularly limited. The iron content of the raw ore with better quality can be ensured, the content of harmful elements is reduced, and the severe change of the temperature field in the furnace caused by a large amount of raw ore entering the furnace is avoided.
In a preferred embodiment, in the step S1, the particle sizes of the raw ore, the sintered ore and the coke are divided into four types, wherein one type comprises 26mm to 35mm, the other type comprises 36mm to 45mm, the three types comprise 46mm to 60mm, the four types comprise more than 60mm, and the particle size of the ball ore comprises 10mm to 20mm. Raw ore smaller than 26mm may be produced into sintered ore by a sintering process. The above particle size is by way of example only, and in other embodiments, different size divisions may be employed to achieve classification of particle sizes. That is, in the same cloth, only raw ore, sintered ore and coke with the same kind of granularity size are used, and the granularity size of the ball ore is always controlled to be 10mm-20mm.
Preferably, in step S2, the ore gear includes 6-10 gears, and the coke gear includes 8-12 gears. That is, when the ore gear is set to 6, the coke gear is set to 8 accordingly; when the ore gear is set to 8 gears, correspondingly, the coke gear is set to 10 gears, and the coke gear is always 2 gears larger than the ore gear, so that the coke can completely cover the ore after being distributed in the blast furnace. The selection of the ore gear can be carried out according to the total weight of the ore, and when the total weight of the ore is large, the ore gear of 10 gears can be selected; when the total weight of the ore is smaller, the ore gear of 6 gears can be selected, so that the uniformity of ore distribution can be improved.
As a preferable scheme, in the step S2, as the ore gear becomes larger, the ore distribution angle sequentially increases; and/or, as the coke gear becomes larger, the coke distribution angle sequentially increases. That is, the ore gear and the coke gear represent different distribution states of the furnace top main belt, when the size of the furnace top space of the blast furnace is fixed, the distribution angle of the furnace top main belt to the center of the blast furnace is minimum, and when the distribution gear is increased, the distribution angle is correspondingly increased until the distribution angle of the furnace top main belt to the periphery of the edge of the blast furnace is maximum.
Preferably, in step S2, the minimum coke distribution angle is 1 ° smaller than the minimum ore distribution angle, and the maximum coke distribution angle is 1 ° larger than the maximum ore distribution angle. Thus, the coke distribution angle and the ore distribution angle can be increased or reduced in a gradient manner, the uniformity of distribution is ensured, and the shaking of a furnace top main belt during distribution is avoided.
Preferably, before step S3, the method further comprises the following steps: the total weight of the ore was confirmed, and the weight ratio of each of the raw ore, the sintered ore and the pellet ore was confirmed. The weight ratio is not particularly limited in this embodiment, and may be selected according to the raw material supply and the process requirements in the actual working conditions. Subsequently, in step S3, the raw ore, the sintered ore and the pellet ore are weighed respectively according to weight ratios, and half of the sintered ore, all of the raw ore, the other half of the sintered ore and all of the pellet ore are distributed into the blast furnace in sequence. Further, when ore and coke are distributed in the blast furnace, the main belt at the top of the blast furnace gradually moves from the center of the blast furnace to the furnace wall of the blast furnace and distributes the ore and the coke; in this way, in the material column after material distribution, the sintered ore is positioned at the central position, so that a soft melting belt is formed; the raw ore is mixed between the sintered ores and is far away from the furnace wall of the blast furnace, so that the influence on the air flow in the furnace is reduced.
In the preferred scheme, in the step S3, when the weight proportion of the raw ore is more than 40%, a plurality of reinforcing steel bars are added, and half of the sintered ore, a plurality of reinforcing steel bars, all the raw ore, the other half of the sintered ore and all the ball ore are sequentially distributed into the blast furnace. The embodiment does not limit the weight proportion of the reinforcing steel bar head, and the reinforcing steel bar head can improve the porosity of the ore-producing area and is beneficial to the flow of air flow.
Preferably, in step S3, the method further comprises the steps of: and detecting the binary basicity of the slag, and when the binary basicity of the slag does not meet the preset standard, adjusting the weight proportion, or adding silica and/or dolomite into the blast furnace to adjust the binary basicity of the slag and ensure the fluidity of the slag.
Example two
The second embodiment of the present invention also provides a method for operating a blast furnace Gao Peibi raw ore, which has the same steps S1 to S3 as those in the first embodiment. As shown in fig. 2, the second embodiment of the present invention is different in that the following steps are further included after step S3: the length of the tuyere small sleeve of the blast furnace is variable, and the length of the tuyere small sleeve is correspondingly increased along with the increase of the weight proportion of the raw ore. Specifically, in actual operation, the length of the tuyere small sleeve can be increased by 5mm according to the ore production proportion increased by 1% -5%, the sufficient gas flow in the center of the blast furnace can be ensured by increasing the length of the tuyere small sleeve of the blast furnace, and the internal pressure of the blast furnace is further prevented from being greatly increased.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. A method for operating a blast furnace Gao Peibi raw ore, comprising the steps of:
s1, respectively screening ore and coke according to particle size, respectively feeding the ore and the coke with the same particle size into a blast furnace bin, wherein the ore comprises raw ore, sintered ore and pellet, and respectively screening the raw ore, the sintered ore and the pellet;
s2, presetting a blast furnace distribution gear and a distribution angle, wherein the gear comprises an ore gear and a coke gear, the distribution angle comprises an ore distribution angle and a coke distribution angle, the ore gear comprises an N gear, each ore grade corresponds to different ore distribution angles, and the ore distribution angles comprise a minimum ore distribution angle and a maximum ore distribution angle; the coke gear comprises an N+2 gear, each coke grade corresponds to different coke distribution angles, each coke distribution angle comprises a minimum coke distribution angle and a maximum coke distribution angle, wherein the minimum coke distribution angle is smaller than the minimum ore distribution angle, and the maximum coke distribution angle is larger than the maximum ore distribution angle;
and S3, distributing the ore and the coke in the blast furnace in sequence according to the distribution gear and the distribution angle of the blast furnace.
2. The method of operating blast furnace Gao Peibi green ore according to claim 1, wherein in said step S1, the particle size of said green ore, said sintered ore and said coke are divided into four kinds in total, wherein one kind comprises 26mm to 35mm, one kind comprises 36mm to 45mm, three kinds comprises 46mm to 60mm, four kinds comprise more than 60mm, and the particle size of said pellet comprises 10mm to 20mm.
3. The method of operating blast furnace Gao Peibi green ore according to claim 1, wherein in step S2, the ore shift range comprises 6 to 10 and the coke shift range comprises 8 to 12.
4. The method of operating a blast furnace Gao Peibi raw ore according to claim 1, wherein in said step S2, said ore distribution angle sequentially increases as said ore shift position becomes larger; and/or, as the coke gear becomes larger, the coke distribution angle sequentially increases.
5. The method of operating blast furnace Gao Peibi green ore according to claim 1, wherein in said step S2, said minimum coke burden distribution angle is 1 ° smaller than said minimum ore burden distribution angle, and said maximum coke burden distribution angle is 1 ° larger than said maximum ore burden distribution angle.
6. The method of operating a blast furnace Gao Peibi green ore according to claim 1, further comprising, before said step S3, the steps of: confirming the total weight of the ore and the weight proportion of each of the raw ore, the sintered ore and the pellet ore;
in the step S3, the raw ore, the sintered ore and the pellet ore are weighed according to the weight ratio, and half of the sintered ore, all of the raw ore, the other half of the sintered ore and all of the pellet ore are distributed into the blast furnace in sequence.
7. The method according to claim 6, wherein in step S3, when the ore and the coke are distributed in the blast furnace, a main belt on the top of the blast furnace is gradually moved from the center of the blast furnace to the wall of the blast furnace and distributed.
8. The method according to claim 6, wherein in the step S3, when the weight ratio of the raw ore is greater than 40%, a plurality of reinforcing bars are added, and half of the sintered ore, the plurality of reinforcing bars, all of the raw ore, the other half of the sintered ore, and all of the ball ore are sequentially distributed into the blast furnace.
9. The method of operating a blast furnace Gao Peibi raw ore according to claim 6, further comprising, in the step S3, the steps of: and detecting the binary basicity of the slag, and adjusting the weight proportion or adding silica and/or dolomite into the blast furnace when the binary basicity of the slag does not meet preset standards.
10. The method for operating a blast furnace Gao Peibi raw ore according to claim 6, further comprising the steps of, after said step S3: the length of the tuyere small sleeve of the blast furnace is variable, and the length of the tuyere small sleeve is correspondingly increased along with the increase of the weight proportion of the raw ore.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311131203.XA CN117126971A (en) | 2023-09-04 | 2023-09-04 | Operation method of blast furnace Gao Peibi raw ore |
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| CN202311131203.XA CN117126971A (en) | 2023-09-04 | 2023-09-04 | Operation method of blast furnace Gao Peibi raw ore |
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| CN117126971A true CN117126971A (en) | 2023-11-28 |
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| CN202311131203.XA Pending CN117126971A (en) | 2023-09-04 | 2023-09-04 | Operation method of blast furnace Gao Peibi raw ore |
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