CN110684874A - Blast furnace material distribution method - Google Patents
Blast furnace material distribution method Download PDFInfo
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- CN110684874A CN110684874A CN201910912450.0A CN201910912450A CN110684874A CN 110684874 A CN110684874 A CN 110684874A CN 201910912450 A CN201910912450 A CN 201910912450A CN 110684874 A CN110684874 A CN 110684874A
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- furnace
- burden
- chute
- furnace burden
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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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/18—Bell-and-hopper arrangements
- C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a blast furnace material distribution method, and belongs to the technical field of blast furnace metallurgy. The material distribution method adopts a material distribution mode of 'annular groove + platform + funnel', and comprises the steps of 1) measuring the angle of a furnace burden chute and the position of a furnace burden falling point; 2) adjusting the depth of the annular groove according to the position of the furnace burden drop point measured in the step 1); and 3) adjusting the depth of the funnel according to the chute distribution angle. The material distribution method provided by the invention can stabilize the air flow distribution in the descending process of the blast furnace burden, improve the production efficiency and the coal gas utilization of the blast furnace, and realize the purposes of continuous rising of the blast furnace yield and continuous reduction of the consumption.
Description
Technical Field
The invention belongs to the technical field of blast furnace metallurgy, and particularly relates to a blast furnace material distribution method.
Background
2 x 4150m steel3The smelted iron-containing raw material contains a large amount of special ore components, and the original charging control technology mainly comprises a platform and funnel distribution form and a central coking distribution form, wherein the platform and funnel distribution form can achieve the aims of high yield and low consumption, but has poor furnace condition stability; cloth form of' central coke feedingAlthough the requirement of the original fuel is low, the yield is low, the consumption is high, and the requirements of high yield and emission reduction cannot be met.
Disclosure of Invention
Aiming at one or more problems in the prior art, the invention provides a blast furnace material distribution method which is characterized in that the material distribution mode of 'annular groove + platform + funnel' is adopted, wherein the annular groove is arranged at the furnace wall of the blast furnace, the funnel is arranged at the center of the furnace throat of the blast furnace, the platform is arranged between the annular groove and the funnel, and the upper end edges of the platform and the annular groove are flush with the upper end edge of the funnel.
The cloth method comprises the following steps:
1) measuring the furnace burden chute angle alpha and the furnace burden falling point position;
2) adjusting the depth of the annular groove according to the position of the furnace burden drop point measured in the step 1); and
3) the depth of the funnel is adjusted according to the furnace burden chute angle alpha.
The specific method for measuring the furnace burden chute angle alpha in the step 1) comprises the following steps: after the maintenance manhole is opened, measuring the furnace burden chute angle alpha by using a measuring tool;
the measuring tool comprises a sliding rod, a sliding block and a chute contact block; the sliding rod is provided with a slideway on the side wall, the chute contact block is fixed at the end part of the sliding rod, the outer side surface of the chute contact block is a chute contact surface, and the chute contact surface is vertical to the slideway; the sliding block comprises a first clamping plate, a second clamping plate, a connecting bolt, a fastening nut, a level meter and a protractor; the first clamping plate and the second clamping plate are respectively positioned at two sides of the sliding rod, the first clamping plate is provided with two fixing through holes, one end of the connecting bolt is connected to the second clamping plate, the other end of the connecting bolt penetrates through the fixing through holes, and the fastening nut is arranged at the other end part of the connecting bolt; the level gauge and the protractor are arranged on the first clamping plate; magnets are embedded on the chute contact surface, a sliding shaft is arranged on the first clamping plate, and the sliding shaft is installed in the sliding way.
The angle alpha of the charging chute is 3-54 degrees.
The specific method for measuring the position of the furnace burden drop point in the step 1) comprises the following steps: after the maintenance manhole is opened, the cross temperature measurement large rod is detached, a pretreated hitting rod is arranged at the position of the large rod, the hitting rod is detached after the material is distributed according to the set chute angle alpha, and the position of a furnace burden drop point is deduced according to the material impact trace on the hitting rod; preferably, the pretreatment is to paint the striking rod and dry the striking rod.
The position of the furnace burden falling point is controlled within the range of 300-500mm from the furnace wall.
The relationship between the deduced furnace burden drop point position and the set chute angle alpha is as follows: the chute angle alpha is set to change by 1 degree, and the position of a furnace burden drop point changes by 200mm in the radial direction of the furnace throat of the blast furnace.
The specific method for adjusting the depth of the annular groove according to the position of the furnace burden falling point in the step 2) comprises the following steps: for the same amount of furnace burden, the more the position of the furnace burden falling point is close to the furnace wall, the shallower the depth of the annular groove is; for the same furnace burden drop point position, the more furnace burden, the shallower the depth of the annular groove; preferably, the depth of the annular groove is 200-500 mm.
The specific method for adjusting the depth of the funnel according to the furnace burden chute angle alpha in the step 3) comprises the following steps: the smaller the furnace burden chute angle alpha is, the more furnace burden is, the shallower the funnel is; when the hopper is deep, the amount of the charging material can be reduced by reducing the angle alpha value of the charging material chute or increasing the small angle alpha.
Based on the distribution mode of the ring groove, the platform and the funnel, the distribution of air flow in the descending process of the blast furnace burden can be stabilized, the production efficiency and the coal gas utilization condition of the blast furnace are improved, the aims of continuously increasing the yield of the blast furnace and continuously reducing the consumption of the blast furnace can be fulfilled, and the purpose of reducing the cost is finally achieved.
Drawings
FIG. 1 is a schematic view of a cloth pattern structure provided by the present invention;
FIG. 2 shows the main economic and technical indexes of 2017 and 2019 of a steel-covered 4150m3 blast furnace adopting the material distribution method of the invention.
Detailed Description
The present invention will be described in detail with reference to the following specific embodiments.
The embodiments are provided in order to provide detailed embodiments and specific procedures, which will help understanding of the present invention, but the scope of the present invention is not limited to the following embodiments.
The invention provides a blast furnace material distribution method, as shown in figure 1, the material distribution method adopts a material distribution mode of a ring groove, a platform and a funnel, wherein the ring groove is arranged at the furnace wall of a blast furnace, the funnel is arranged at the center of the furnace throat of the blast furnace, the platform is arranged between the ring groove and the funnel, and the upper end edges of the platform and the ring groove are flush with the upper end edge of the funnel. The cloth distributing method comprises the following steps:
1) measuring the furnace burden chute angle alpha and the furnace burden falling point position;
the specific method for measuring the furnace charge chute angle alpha comprises the following steps: and after the maintenance manhole is opened, measuring the furnace burden chute angle alpha by using a measuring tool. Wherein the measuring tool is described in detail in the prior art CN207031472U, and comprises a slide bar, a slide block and a chute contact block; the sliding rod is provided with a slideway on the side wall, the chute contact block is fixed at the end part of the sliding rod, the outer side surface of the chute contact block is a chute contact surface, and the chute contact surface is vertical to the slideway; the sliding block comprises a first clamping plate, a second clamping plate, a connecting bolt, a fastening nut, a level meter and a protractor; the first clamping plate and the second clamping plate are respectively positioned at two sides of the sliding rod, the first clamping plate is provided with two fixing through holes, one end of the connecting bolt is connected to the second clamping plate, the other end of the connecting bolt penetrates through the fixing through holes, and the fastening nut is arranged at the other end part of the connecting bolt; the level gauge and the protractor are arranged on the first clamping plate; magnets are embedded on the chute contact surface, a sliding shaft is arranged on the first clamping plate, and the sliding shaft is installed in the sliding way. Other descriptions of the measurement tool are not repeated herein. In the present invention, the furnace burden chute angle α is set to 3 to 54 °, for example, 3 °, 10 °, 15 °, 25 °, 30 °, 40 °, 50 °, 54 °, and the like.
The specific method for measuring the position of the furnace charge falling point comprises the following steps: and after the maintenance manhole is opened, the cross temperature measurement large rod is detached, a pretreated (such as painted and dried) striking rod is arranged at the position of the large rod, the striking rod is detached after the material is distributed according to the set chute angle alpha, and the position of a furnace burden falling point is deduced according to the material impact trace on the striking rod. Wherein the deduced relation between the position of the furnace burden falling point and the set chute angle alpha is as follows: the chute angle alpha is set to change by 1 degree, and the position of a furnace burden drop point changes by 200mm in the radial direction of the throat of the blast furnace, which is measured by the inventor according to the actual distribution condition. The position of the furnace burden falling point is controlled within the range of 300-500mm, such as 300mm, 350mm, 400mm, 450mm, 500mm and the like from the furnace wall.
2) Adjusting the depth of the annular groove according to the position of the furnace burden drop point measured in the step 1);
the specific method for adjusting the depth of the annular groove according to the position of the furnace burden falling point comprises the following steps: for the same amount of furnace burden, the more the position of the furnace burden falling point is close to the furnace wall, the shallower the depth of the annular groove is; for the same furnace burden drop point position, the more furnace burden, the shallower the depth of the annular groove; preferably, the annular groove depth is 200-500mm, such as 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, and the like.
3) Adjusting the depth of the funnel according to the furnace burden chute angle alpha;
the specific method for adjusting the depth of the funnel according to the furnace burden chute angle alpha comprises the following steps: the smaller the furnace burden chute angle alpha is, the more furnace burden is, the shallower the funnel is; when the hopper is deep, the amount of the charging material can be reduced by reducing the angle alpha value of the charging material chute or increasing the small angle alpha. The hopper is deep, the coal gas utilization is high, and the resistance of the blast furnace is relatively low. The funnel is shallow, and central coke is many, and central air current guarantees more easily.
The invention also provides a method for measuring the position of a furnace burden drop point, which is used for the burden distribution method provided by the invention, and the method comprises the following steps: and after the maintenance manhole is opened, the cross temperature measurement large rod is detached, a pretreated (such as painted and dried) striking rod is arranged at the position of the large rod, the striking rod is detached after the material is distributed according to the set chute angle, and the position of a furnace burden falling point is deduced according to the material impact trace on the striking rod. Wherein the deduced relation between the position of the furnace burden falling point and the set chute angle alpha is as follows: the chute angle alpha is set to change by 1 degree, and the position of a furnace burden drop point changes by 200mm in the radial direction of the furnace throat of the blast furnace.
As shown in FIG. 2, a steel clad 4150m is shown3The blast furnace adopts the 'ring groove + flat' provided by the inventionAfter the material distribution mode of the platform and the hopper, the main economic and technical indexes (including yield and fuel ratio) of the blast furnace from 2017 to 2019 are continuous for three years, and the aims of continuously increasing the yield of the blast furnace and continuously reducing the consumption of the blast furnace are fulfilled.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The blast furnace material distribution method is characterized in that the material distribution mode of 'a ring groove, a platform and a funnel' is adopted, wherein the ring groove is arranged at the position of a blast furnace wall, the funnel is arranged at the center of a blast furnace throat, the platform is arranged between the ring groove and the funnel, and the upper end edges of the platform and the ring groove are flush with the upper end edge of the funnel.
2. The material distributing method according to claim 1, characterized by comprising the steps of:
1) measuring the furnace burden chute angle alpha and the furnace burden falling point position;
2) adjusting the depth of the annular groove according to the position of the furnace burden drop point measured in the step 1); and
3) the depth of the funnel is adjusted according to the furnace burden chute angle alpha.
3. The burden distribution method according to claim 2, wherein the specific method for measuring the furnace burden chute angle alpha in the step 1) comprises the following steps: after the maintenance manhole is opened, measuring the furnace burden chute angle alpha by using a measuring tool;
the measuring tool comprises a sliding rod, a sliding block and a chute contact block; the sliding rod is provided with a slideway on the side wall, the chute contact block is fixed at the end part of the sliding rod, the outer side surface of the chute contact block is a chute contact surface, and the chute contact surface is vertical to the slideway; the sliding block comprises a first clamping plate, a second clamping plate, a connecting bolt, a fastening nut, a level meter and a protractor; the first clamping plate and the second clamping plate are respectively positioned at two sides of the sliding rod, the first clamping plate is provided with two fixing through holes, one end of the connecting bolt is connected to the second clamping plate, the other end of the connecting bolt penetrates through the fixing through holes, and the fastening nut is arranged at the other end part of the connecting bolt; the level gauge and the protractor are arranged on the first clamping plate; magnets are embedded on the chute contact surface, a sliding shaft is arranged on the first clamping plate, and the sliding shaft is installed in the sliding way.
4. The method of distributing material in claim 3, wherein the charge chute angle α is 3-54 °.
5. The method as claimed in claim 2, wherein the specific method for determining the position of the charge material landing point in step 1) is as follows: after the maintenance manhole is opened, the cross temperature measurement large rod is detached, a pretreated hitting rod is arranged at the position of the large rod, the hitting rod is detached after the material is distributed according to the set chute angle alpha, and the position of a furnace burden drop point is deduced according to the material impact trace on the hitting rod; preferably, the pretreatment is to paint the striking rod and dry the striking rod.
6. The burden distribution method as claimed in claim 5, wherein the burden drop point position is controlled within a range of 300mm and 500mm from the furnace wall.
7. The burden distribution method according to claim 5 or 6, wherein the derived relationship between the burden drop point position and the set chute angle α is: the chute angle alpha is set to change by 1 degree, and the position of a furnace burden drop point changes by 200mm in the radial direction of the furnace throat of the blast furnace.
8. The burden distributing method according to claim 2, wherein the specific method for adjusting the depth of the annular groove according to the position of the burden dropping point in the step 2) comprises the following steps: for the same amount of furnace burden, the more the position of the furnace burden falling point is close to the furnace wall, the shallower the depth of the annular groove is; for the same furnace burden drop point position, the more furnace burden, the shallower the depth of the annular groove; preferably, the depth of the annular groove is 200-500 mm.
9. The material distribution method according to claim 2, characterized in that the specific method for adjusting the depth of the funnel according to the furnace burden chute angle α in the step 3) is as follows: the smaller the furnace burden chute angle alpha is, the more furnace burden is, the shallower the funnel is; when the hopper is deep, the amount of the charging material can be reduced by reducing the angle alpha value of the charging material chute or increasing the small angle alpha.
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|---|---|---|---|
| CN201910912450.0A CN110684874A (en) | 2019-09-25 | 2019-09-25 | Blast furnace material distribution method |
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| CN201910912450.0A CN110684874A (en) | 2019-09-25 | 2019-09-25 | Blast furnace material distribution method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115109881A (en) * | 2022-08-10 | 2022-09-27 | 广东韶钢松山股份有限公司 | Method and device for distributing materials on furnace top |
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2019
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Patent Citations (7)
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| JPH08302410A (en) * | 1995-04-28 | 1996-11-19 | Kawasaki Steel Corp | Method for detecting in-furnace position of charging materials in blast furnace |
| JP2010174371A (en) * | 2008-12-29 | 2010-08-12 | Nippon Steel Corp | Apparatus and method for measuring profile of charged material in blast furnace |
| CN201857400U (en) * | 2010-07-28 | 2011-06-08 | 程树森 | Blast furnace chute inclination angle detection system |
| JP2012214830A (en) * | 2011-03-31 | 2012-11-08 | Nippon Steel Corp | Method for measuring falling locus of charging object in blast furnace and metering rod |
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Non-Patent Citations (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115109881A (en) * | 2022-08-10 | 2022-09-27 | 广东韶钢松山股份有限公司 | Method and device for distributing materials on furnace top |
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Application publication date: 20200114 |