CN110923379B - Blast furnace burden distribution method for smelting vanadium titano-magnetite - Google Patents
Blast furnace burden distribution method for smelting vanadium titano-magnetite Download PDFInfo
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- CN110923379B CN110923379B CN201911071756.4A CN201911071756A CN110923379B CN 110923379 B CN110923379 B CN 110923379B CN 201911071756 A CN201911071756 A CN 201911071756A CN 110923379 B CN110923379 B CN 110923379B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000003723 Smelting Methods 0.000 title claims abstract description 13
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 9
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 9
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims description 11
- 239000000571 coke Substances 0.000 claims abstract description 65
- 239000008188 pellet Substances 0.000 claims abstract description 39
- 239000011159 matrix material Substances 0.000 claims abstract description 10
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 abstract description 16
- 239000004744 fabric Substances 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 10
- 239000002245 particle Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Classifications
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- 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
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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
本申请公开了一种冶炼钒钛磁铁矿的高炉布料方法，包括以下参数：矿石批重控制在0.022～0.029t/m3·炉容，球团矿比例为30％～70％；布料矩阵的矿石平台为2.5°～7°；布料矩阵的外环和内环布焦炭，不布矿石，外环焦炭角度减外环矿石角度为1°～3°，内环矿石角度减内环焦炭角度为6°～8°；焦炭平台为6°～13°，除中心焦外，其他焦炭相邻两环之间的角度差为1°～3°。本发明的高炉布料方法将高炉球团矿比例提高到30～70％，因钒钛球团矿品位比钒钛烧结矿品位高1～4个百分点，高炉综合入炉品位提高1～5个百分点，高炉煤气利用率提高1～3个百分点，有利于高炉利用系数的提高和燃料比的下降。The present application discloses a blast furnace distribution method for smelting vanadium titanomagnetite, including the following parameters: the batch weight of ore is controlled at 0.022-0.029t/m 3 ·furnace capacity, the proportion of pellets is 30%-70%; the distribution matrix The ore platform is 2.5°～7°; the outer and inner rings of the cloth matrix are distributed with coke, without ore, the outer ring coke angle minus the outer ring ore angle is 1°～3°, the inner ring ore angle minus the inner ring coke angle It is 6°～8°; the coke platform is 6°～13°, except for the center coke, the angle difference between the adjacent two rings of other coke is 1°～3°. The blast furnace distribution method of the present invention increases the proportion of blast furnace pellets to 30-70%, because the grade of vanadium-titanium pellets is 1-4 percentage points higher than that of vanadium-titanium sintered ore, and the comprehensive charging grade of the blast furnace is increased by 1-5 percentage points , the utilization rate of blast furnace gas is increased by 1 to 3 percentage points, which is beneficial to the improvement of the utilization coefficient of the blast furnace and the decrease of the fuel ratio.
Description
Technical Field
The application relates to the technical field of smelting of high-titanium type vanadium titano-magnetite, in particular to a blast furnace material distribution method for smelting vanadium titano-magnetite.
Background
In the current smelting technology of high-titanium vanadium titano-magnetite, for a blast furnace with a bell-less top, pellet ore, sinter ore and natural lump ore are distributed on the cross section of the blast furnace throat through the rotation and the tilting of a distributor on the top of the blast furnace during the distribution of the blast furnace. The characteristic parameters in the blast furnace material distribution method are material distribution sequence, material distribution angle and material distribution turn number, wherein the characteristic parameters comprise material distribution characteristic parameters of two large varieties of ore and coke. The material distribution method mainly aims at controlling and adjusting the sintering ore with the furnace burden structure, wherein the proportion of the vanadium-titanium pellets is less than 30 percent, and the proportion of the sintering ore is more than or equal to 60 percent, so as to achieve the purposes of stable and smooth operation of a blast furnace, reasonable distribution of gas flow in the furnace and better utilization rate of gas. The traditional material distribution method is not suitable for smelting high-proportion pellets with the vanadium-titanium pellet proportion being within the range of 30-70%.
Content of application
In view of this, the present application aims to disclose a blast furnace burden distribution method for smelting vanadium-titanium magnetite to increase the vanadium-titanium pellet ratio.
In order to achieve the above purpose, the present application discloses the following technical solutions:
a blast furnace burden distribution method for smelting vanadium titano-magnetite comprises the following parameters:
the weight of the ore is controlled to be 0.022 to 0.029t/m3The furnace volume, the pellet proportion is 30% -70%;
the ore platform of the distribution matrix is 2.5-7 degrees;
coke is distributed on the outer ring and the inner ring of the distribution matrix, no ore is distributed, the angle of the outer ring coke minus the angle of the outer ring ore is 1-3 degrees, and the angle of the inner ring ore minus the angle of the inner ring coke is 6-8 degrees;
the coke platform is 6 degrees to 13 degrees, except for the central coke, the angle difference between two adjacent rings of other cokes is 1 degree to 3 degrees;
wherein the ore platform is the angle difference from the outermost ring of ore to the innermost ring of ore; the coke platform is the angle of the outer ring coke minus the angle of the inner ring coke (except for the center coke).
Preferably, in the blast furnace material distribution method, the number of turns of the outer ring of the coke is 2-4, and the number of turns of the inner ring is 3-5.
Preferably, in the blast furnace burden distribution method, the outer ring coke accounts for 12-30% of the total coke amount, and the inner ring coke accounts for 20-35% of the total coke amount.
Preferably, in the blast furnace burden distribution method, pellets are distributed at the outer edge of the ore annulus if the edge airflow needs to be suppressed according to the requirement of gas flow distribution in the blast furnace; if the edge airflow is normal, the pellets are distributed in the middle zone of the ore zone.
Preferably, in the blast furnace burden distribution method, the average grain size of the pellets is 9mm to 16mm, and the average grain size of the sintered ore is 15mm to 25 mm.
According to the technical scheme, the blast furnace burden distribution method for smelting vanadium titano-magnetite disclosed by the application comprises the following parameters: the weight of the ore is controlled to be 0.022 to 0.029t/m3The furnace volume, the pellet proportion is 30% -70%; the ore platform of the distribution matrix is 2.5-7 degrees; of cloth matrixCoke is distributed on the outer ring and the inner ring, no ore is distributed, the angle of the outer ring coke minus the angle of the outer ring ore is 1-3 degrees, and the angle of the inner ring ore minus the angle of the inner ring coke is 6-8 degrees; the coke platform is 6 degrees to 13 degrees, except for the central coke, the angle difference between two adjacent rings of other cokes is 1 degree to 3 degrees; wherein the ore platform is the angle difference from the outermost ring of ores to the innermost ring of ores; the coke platform is the outer ring coke angle minus the inner ring coke angle (except for the center coke).
According to the blast furnace burden distribution method, the proportion of blast furnace pellets is improved to 30-70%, the grade of vanadium-titanium pellets is 1-4% higher than that of vanadium-titanium sinter, the comprehensive furnace feeding grade of the blast furnace is improved by 1-5%, the utilization rate of blast furnace gas is improved by 1-3%, and the improvement of the utilization coefficient of the blast furnace and the reduction of the fuel ratio are facilitated.
Detailed Description
The embodiment of the application discloses a blast furnace burden distribution method for smelting vanadium-titanium magnetite, which improves the vanadium-titanium pellet ore proportion.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The blast furnace burden distribution method for smelting vanadium titano-magnetite disclosed by the embodiment of the application comprises the following parameters:
1) the weight of the ore is controlled to be 0.022 to 0.029t/m3The furnace volume, the pellet proportion is 30% -70%; because the average granularity of the pellets is smaller than that of the sinter and the stacking angle of the pellets in the blast furnace is smaller than that of the sinter, when the proportion of the pellets is increased, the batch weight of the ore is improved and is higher than that of the pellets<When the content is 30%, the size is 1-5%.
2) The ore platform of the distribution matrix (namely the angle difference from the outermost ring ore to the innermost ring ore) is 2.5-7 degrees, which is 0.5-2 degrees smaller than that when the proportion of the pellet ore is less than 30 percent;
3) coke is distributed on the outer ring and the inner ring of the distribution matrix, no ore is distributed, the angle of the outer ring coke minus the angle of the outer ring ore is 1-3 degrees, and the angle of the inner ring ore minus the angle of the inner ring coke is 6-8 degrees;
4) the coke platform (namely the angle of the outer ring coke minus the angle of the inner ring coke (except for the central coke)) is 6-13 degrees, except the central coke, the angle difference between two adjacent rings of other cokes is 1-3 degrees, and the angle difference can be a positive value or a negative value.
According to the blast furnace burden distribution method, the proportion of blast furnace pellets is improved to 30-70%, the grade of vanadium-titanium pellets is 1-4% higher than that of vanadium-titanium sinter, the comprehensive furnace feeding grade of the blast furnace is improved by 1-5%, the utilization rate of blast furnace gas is improved by 1-3%, and the improvement of the utilization coefficient of the blast furnace and the reduction of the fuel ratio are facilitated.
The blast furnace burden distribution method is suitable for effective volume>1000m3Of blast furnace, slag TiO2The vanadium-titanium pellet ore is more than or equal to 18 percent, and the vanadium-titanium pellet ore proportion is more than or equal to 30 percent.
In the preferred technical scheme, the number of turns of the outer ring of the coke is 2-4, the number of turns of the inner ring is 3-5, and of course, other numbers of turns can be selected from the coke according to the practical application condition.
In a further technical scheme, the outer ring coke accounts for 12-30% of the total amount of the coke, and the inner ring coke accounts for 20-35% of the total amount of the coke.
The blast furnace burden distribution method determines that the pellets are distributed on the outer edge or the middle girdle of the ore girdle according to the development degree of the edge airflow; according to the distribution requirement of gas flow in the blast furnace, if the edge gas flow needs to be restrained, the pellets are distributed at the outer edge of the ore ring belt; if the edge airflow is normal, the pellets are distributed in the middle girdle of the ore girdle, so that the risks that the pellets roll to the edge and the center block the edge and the central gas flow channel are avoided, and the stable and smooth operation of the blast furnace is ensured.
Specifically, the average particle size of the pellet is 9-16 mm, and the average particle size of the sinter is 15-25 mm. Of course, the average particle size may be other values according to practical applications.
The method designs the material distribution method of the high-proportion pellet blast furnace according to the characteristics of small and uniform particle size, easy rolling and small stacking angle of the pellets, so as to achieve the purposes of stable and smooth operation of the blast furnace, reasonable distribution of gas flow and good utilization rate of gas.
The specific implementation mode of the blast furnace burden distribution method is as follows:
for example, the furnace volume of a blast furnace is 1750m3Slag TiO2The vanadium-titanium pellet ore is 22 percent, the vanadium-titanium pellet ore proportion is 40 percent, the ore batch weight is 43.5 t/batch, the coke load is 4.35 times, and the distribution matrix is shown in the following table, wherein the outer ring proportion of the coke is 15.4 percent, and the inner ring proportion of the coke is 30.8 percent.
| α | 38 | 37 | 35.5 | 33.5 | 31.5 | 29.5 | 25 |
| O | 0 | 3 | 3 | 2 | 2 | 0 | 0 |
| C | 2 | 2 | 1 | 1 | 1 | 2 | 4 |
In the above table, α is the cloth angle in degrees; o represents the number of turns of the ore, and the unit is a turn; c represents the number of coke turns in turns.
Other values can be selected for the above parameters according to practical application.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A blast furnace burden distribution method for smelting vanadium titano-magnetite is characterized by comprising the following parameters:
the weight of the ore is controlled to be 0.022 to 0.029t/m3Furnace volume, pellet ratio 40% -70%;
the ore platform of the distribution matrix is 5.5-7 degrees;
coke is distributed on the outer ring and the inner ring of the distribution matrix, no ore is distributed, the angle of the outer ring coke minus the angle of the outer ring ore is 1-3 degrees, and the angle of the inner ring ore minus the angle of the inner ring coke is 6.5-8 degrees;
the coke platform is 6 degrees to 13 degrees, except for the central coke, the angle difference between two adjacent rings of other cokes is 1 degree to 3 degrees;
wherein the ore platform is the angle difference from the outermost ring of ore to the innermost ring of ore; the coke platform is the angle of the outer ring coke minus the angle of the inner ring coke (except for the center coke).
2. The blast furnace charging method according to claim 1, wherein the number of turns of the outer ring of the coke is 2 to 4, and the number of turns of the inner ring is 3 to 5.
3. The blast furnace charging method according to claim 2, wherein the outer ring coke accounts for 12-30% of the total amount of the coke, and the inner ring coke accounts for 20-35% of the total amount of the coke.
4. The blast furnace burden distribution method according to claim 1, wherein pellets are distributed on the outer edge of the ore annulus if the edge gas flow needs to be suppressed according to the distribution requirement of the gas flow in the blast furnace; if the edge airflow is normal, the pellets are distributed in the middle zone of the ore zone.
5. The blast furnace burden distribution method of claim 1, wherein the average grain size of the pellets is 9mm to 16mm, and the average grain size of the sintered ore is 15mm to 25 mm.
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| CN112131527B (en) * | 2020-09-08 | 2024-04-12 | 大同冀东水泥有限责任公司 | Refined ore blending quality control method for limestone mine in cement plant |
| CN114959258B (en) * | 2022-05-30 | 2024-06-18 | 广东韶钢松山股份有限公司 | Smelting method of blast furnace high-proportion pellets |
| CN115627307A (en) * | 2022-11-09 | 2023-01-20 | 四川德胜集团钒钛有限公司 | Blast furnace smelting method for vanadium titano-magnetite of high-proportion pellet ore |
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