CN107614707B - To the device of blast furnace charging feedstock - Google Patents
To the device of blast furnace charging feedstock Download PDFInfo
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- CN107614707B CN107614707B CN201680030286.5A CN201680030286A CN107614707B CN 107614707 B CN107614707 B CN 107614707B CN 201680030286 A CN201680030286 A CN 201680030286A CN 107614707 B CN107614707 B CN 107614707B
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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
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
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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
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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)
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- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
- Manufacture Of Iron (AREA)
Abstract
The present invention relates to the devices to blast furnace charging feedstock.The purpose is to improve the segregation precision for intentionally making the particle segregation of the blast furnace raw material in furnace top bin.Have: inclined hang plate (11) is configured in furnace top bin (10), and the blast furnace raw material for putting into furnace top bin (10) is induced towards wall surface；Vertex determination unit (13) determines the height at the top (P) for the blast furnace raw material heap being stored in furnace top bin (10)；And inclination angle adjustment section (14), the variation of the height determined with vertex determination unit (13) accordingly change at the inclination angle (θ) of hang plate (11) towards the direction continuously or intermittently to become smaller.The blast furnace raw material of the amount of 1/10 range below in initial stage input amount initially put into is the ore raw materials not comprising coke.
Description
Technical field
The present invention relates to being segregated blast furnace raw material and be stored in the technology of furnace top bin, furnace top bin is configured at upper blast furnace
And for being packed into blast furnace raw material to blast furnace.
Background technique
In recent years, from the viewpoint of preventing global warming, it is desirable to reduce CO2。
In iron steel industry, CO2About the 70% of discharge rate is generated by blast furnace, and the CO for reducing blast furnace is sought2Discharge rate.
For reducing the CO of blast furnace2For, can by reduce blast furnace used in reducing material (coke, carbon dust, natural gas etc.) come
It realizes.
But in the case where reducing reducing material used in blast furnace, particularly coke, due to ventilating in guarantee furnace
Property coke reduce, so the aeration resistance in blast furnace increases.That is, in general blast furnace, if from the ore that furnace roof is packed into
Up to the temperature for starting softening, then deformed while filling gap due to being present in the load of the blast furnace raw material on top.
Therefore, in bottom house, the aeration resistance of ore layer is very big, forms gas almost immobilising fusion zone.The fusion zone
Aeration has large effect to the aeration of blast furnace entirety, carries out rate controlling to the production efficiency of blast furnace.
The known aeration resistance in order to improve fusion zone is more had using the mixed raw material for being mixed with coke to ore layer
Effect, in order to have many invention achievements to the ore layer mixing coke.
Such as in patent document 1, in no bell type-blast furnace, the hopper in the downstream side into ore hopper is packed into coke simultaneously
After having accumulated coke on ore on a conveyor, it is loaded into furnace top bin, and slips ore and coke via rotation
Slot is packed into blast furnace.In patent document 2, ore and coke are stored in furnace top bin respectively, and coke is mixed simultaneously with ore
Attach together into, as a result, simultaneously carry out coke be generally encased in batch, the center loading batch of coke and mixing be packed into batch
These three secondary batches.In addition, in patent document 3, the unstable and central part of the melting belt shape of blast furnace operating in order to prevent
The raising of stable operation and the thermal efficiency is realized in the reduction of neighbouring gas effciency, and in the blast furnace raw material charging method of blast furnace
In, it is packed into furnace after whole ores and whole coke are thoroughly mixed.
In addition, reducing effect by the aeration resistance in fusion zone that mixed raw material generates to enjoy, need to fit in blast furnace
The loading position of locality control mixed raw material.Therefore, previous exploitation has the segregation skill for the blast furnace raw material for being packed into blast furnace roof feed bin
Art.This is in order to which the position more and poor aeration to the charge weight of ore arbitrarily mixes coke, and in State of Blast Furnace liftout
It is segregated coke in storehouse, thus the technology on the discharge opportunity of mixed raw material of the control from blast furnace roof feed bin.
As the technology of this segregation, in patent document 4, proposes there is following scheme: the side of falling to blast furnace raw material is set
To the hang plate freely to fascinate changed, the loading position of blast furnace raw material is set, to intentionally make the grain of blast furnace raw material
Degree segregation.It in patent document 4, records as follows: making the blast furnace raw material particle segregation in furnace top bin in this way, it can be in the phase
Hope the opportunity of discharge mixed raw material that coke is packed into furnace.
In addition, being recorded as follows in patent document 5: could be used without the segregation of the worry of the inner wall interference to furnace top bin
Cylinder is induced, and blast furnace raw material is fallen into mouth assembly near the inner wall close to furnace body center, to improve the inclined of blast furnace raw material
Analyse effect.
In addition, in patent document 6, as by blast furnace raw material the furnace top bin that the furnace roof of blast furnace is arranged is segregated and is packed into
It is segregated device, the top in furnace top bin has segregation distributor, which can be around the cross section of furnace top bin
The vertical axis of central portion rotates, and the up and down direction downside for accepting the blast furnace raw material being packed into from top is greater than the blast furnace raw material
Angle of repose.
In addition, being abutted in the mounted inside of furnace top bin for blast furnace raw material in device documented by patent document 7 and making it
The segregation control panel freely to fascinate for falling direction change, in the opposite with the face abutted for blast furnace raw material of the segregation control panel
The face distributed magnet of side, the charge weight drop for the per unit area which accumulate blast furnace raw material to blast furnace raw material constructional surface
It is low.According to this structure, when the blast furnace raw material of supply to furnace top bin is with being segregated control panel and abutting, blast furnace raw material is to the segregation control
Making sheet abut abutting width due to magnet attraction and expand.It is described below in patent document 7 as a result: making blast furnace raw material
The per unit area relative to blast furnace raw material constructional surface charge weight reduce, thus prevent constructional surface avalanche, collapse, by force
Change the segregation phenomena of the particulate and coarse grain in furnace top bin, and size distribution is discharged in the blast furnace raw material from furnace top bin
Control is desired pattern.
Patent document 1: Japanese Unexamined Patent Publication 3-211210 bulletin
Patent document 2: Japanese Unexamined Patent Publication 16-107794 bulletin
Patent document 3: Japanese Unexamined Patent Application 53-152800 bulletin
Patent document 4: Japanese Unexamined Patent Publication 2008-179899 bulletin
Patent document 5: Japanese Unexamined Patent Publication 2011-132597 bulletin
Patent document 6: Japanese Unexamined Patent Publication 2012-132056 bulletin
Patent document 7: Japanese Unexamined Patent Publication 2012-72471 bulletin
However, any patent document does not all consider the variation of the accumulation shape for the blast furnace raw material being stored in furnace top bin.
Therefore, the precision for being stored in the segregation of the blast furnace raw material in furnace top bin is correspondingly poor.
Summary of the invention
The present invention is conceived to aspect as described above and completes, and the purpose is to improve the grain for intentionally making blast furnace raw material
Spend the segregation precision of segregation.
Inventor is studied, and finds following situation: carrying out the feelings of the segregation of the granularity in furnace top bin in hang plate
Under condition, if the position at the top for the material pile being deposited in furnace top bin produces in plan view far from furnace top bin wall surface
The descending (full front of a Chinese gown is wild) of the raw raw material for being deposited in the two positions of side surface side and the opposite side of wall surface, since the descending the long, more has
The segregation for helping mix coke, so particle segregation can be promoted.That is, with the top for the heap being biased in blast furnace raw material constructional surface
It is more difficult that the mode of any one is precisely placed raw material.
Additionally, it was found that following situation: even if the position at the top for the blast furnace raw material heap being piled up in furnace top bin is being bowed
Depending on observation when close to furnace top bin wall surface and in the presence of, when material bump against close to the heap top furnace top bin wall surface
When side, in the case where more than the high regulation of the height at the top than heap, the rebound from furnace top bin wall surface becomes larger, and becomes really
The reason of precision of segregation is deteriorated.
That is, a mode of the invention is used to make to put into furnace roof to the device of blast furnace charging feedstock in order to solve the problems, such as
Feed bin is to be segregated and store in the furnace top bin to the blast furnace raw material that blast furnace is packed into, the above-mentioned device to blast furnace charging feedstock
Be characterized in that having: inclined hang plate is configured in above-mentioned furnace top bin, and above-mentioned furnace top bin is put into undertaking
Blast furnace raw material simultaneously induces it towards the wall surface in above-mentioned furnace top bin；Vertex determination unit, by detecting or inferring come to storage
There are the height at the top of the blast furnace raw material heap in above-mentioned furnace top bin to be determined；And inclination angle adjustment section, if above-mentioned
The blast furnace raw material of preset initial stage input amount or more is stored in furnace top bin, then above-mentioned inclination angle adjustment section and above-mentioned vertex
The height that determination unit determines accordingly changes the inclination angle of above-mentioned hang plate, thus by blast furnace raw material induce to above-mentioned vertex
The wall surface position of the above-mentioned furnace top bin of the identical height of the height that determination unit determines or induce to be located at the wall surface position
With the wall surface position of the range from the position of the wall surface position with preset surplus upward, in above-mentioned initial stage input amount
In the blast furnace raw material initially put into of amount of at least 1/10 range of the initial stage input amount be the ore raw materials not comprising coke.
In the state that hang plate is tilted with the angle of depression of the same direction, if with hang plate to input blast furnace raw material into
Row induces, then the side surface side in the side that the top deviation of blast furnace raw material heap is induced with hang plate and the shape in stacking states
Under state, blast furnace raw material is stored in furnace top bin.
At this point, in the present invention, by the range towards height identical with the top of the heap of same storage at a distance of surplus
Wall surface position investment blast furnace raw material induced, can by the top of the heap of storage control the wall surface position or with this
Wall surface close position, and negative effect caused by the rebound from wall surface can be suppressed to smaller.
Therefore, the blast furnace raw material of accumulation, which piles up, has from above-mentioned wall surface only uniaxially heap in the state of inclined inclined-plane
Product, can more accurately generate particle segregation.
According to the invention it is thus possible to mixed raw material be taken out according to the sequence of coarse grain, particulate from blast furnace roof, as a result,
Coke can be packed into large quantities in any position in blast furnace.This can be realized the raising of reaction in furnace, and be related to reduction
The reduction of material ratio.
Detailed description of the invention
Fig. 1 is illustrated to based on furnace top bin involved in embodiments of the present invention and device for charging material
Schematic diagram.
Fig. 2 is the figure for indicating to accumulate the situation example of raw material to blast furnace.
The figure that the problem of Fig. 3 is the stacking states to existing blast furnace raw material is illustrated.
Fig. 4 is the passage variation for the amount for indicating the mixing material from the blast furnace raw material that the furnace top bin of upper blast furnace is discharged
Figure.
Fig. 5 is the figure for indicating the standard deviation of each degree of mixing in example and comparative example.
Fig. 6 is the figure being illustrated to the passage variation at any time of hang plate.
Specific embodiment
Next, the embodiments of the present invention will be described with reference to the drawings.
Here, attached drawing is schematical figure, and size etc. is different from reality.In addition, embodiment pair described below
For illustrating the structure of technical idea materialization of the invention, the construction etc. of technical idea of the invention is not determined as
Following constructions etc..Technical idea of the invention energy in the technical scope of claim defined documented by claims
Enough apply various changes.
(structure)
As shown in Figure 1, have furnace top bin 10 to the device of blast furnace charging feedstock, be configured in furnace top bin 10 can
The hang plate 11 to fascinate, driving portion 12, vertex determination unit 13 and inclination angle that the tiltangleθ of hang plate 11 is changed
Adjustment section 14.
Furnace top bin 10 is configured at the furnace roof of blast furnace 20.
As shown in Figure 1, the furnace top bin 10 of present embodiment is formed with input port 10a in upper end, and in lower end
Secund it is formed with outlet 10b.In Fig. 1, outlet 10b is biased to left side and is formed.
Moreover, being transported to the blast furnace raw material of the input port 10a of furnace top bin 10 from input port 10a to furnace by conveyer belt 15
It is successively put into liftout storehouse 10.
Here, as shown in Figure 1, the blast furnace raw material on conveyer belt 15 is to accumulate ore raw materials 16 in lower layer and accumulate on it
The state of coke 17 is conveyed.But for the part at the investment initial stage put into furnace top bin 10, become in ore raw materials 16
On do not accumulate the state of coke 17, thus initially, only into furnace top bin 10, investment has 16 (Fig. 1 of ore raw materials of specified amount
" 1 " part).Thereby, it is possible to the initial blast furnace raw material devoted in furnace top bin 10 is only set as ore raw materials.Its
Afterwards, it is set as the mixed raw material being made of the mixing material of ore raw materials 16 and coke 17 putting into (Fig. 1 into furnace top bin 10
" 2 " and " 3 " part).In addition, being the ore raw materialss such as sinter, lump ore stone, pellet as ore raw materials 16.
Hang plate 11 is configured at from the lower section for the position that the blast furnace raw material that input port 10a is put into is fallen, and is thrown from input port 10a
The blast furnace raw material entered is abutted with the upper surface of hang plate 11.
The hang plate 11 is tilted with the defined angle of depression relative to horizontal direction, the inclined direction in plan view,
It is tilted in a manner of being located remotely from the side wall surface 10c of the furnace top bin 10 of side of outlet 10b downward.In Fig. 1, incline
The wall surface 10c of inclined plate 11 to the right rolls oblique.The tiltangleθ of hang plate 11 is defined relative to the angle of depression of horizontal direction.
In addition it is also possible to which the rising portions (not shown) erected upwards are arranged in the width direction two sides of hang plate 11, make
It is unrestrained that blast furnace raw material is difficult to two sides in the width direction.
Hang plate 11 has the axle portion by axis towards left and right, and is supported on furnace top bin 10 via the axle portion.Then, it tilts
Plate 11 can fascinate using the axle portion as rotary shaft.
The driving portion 12 for making axle portion carry out axis rotation is connect with the axle portion.Driving portion 12 is for example made of stepper motor.It should
Driving portion 12 is located at the outside of furnace top bin 10.
Vertex determination unit 13 is by detecting or inferring come the top to 1 heap of blast furnace raw material being deposited in furnace top bin 10
The device that the height of P is determined.
Here, in Fig. 1, towards right side induce blast furnace raw material, be stored in as a result, the blast furnace raw material 1 in furnace top bin 10 with
The mode that the top P of blast furnace raw material 1 is biased to right side in Fig. 1 is accumulated.Therefore, by detecting the heaped-up of the blast furnace raw material on the right side of this
State is able to detect the height of the top P of 1 heap of blast furnace raw material.
The vertex determination unit 13 of present embodiment is made of rangefinders such as laser range finders.Vertex determination unit 13 is configured at use
The distance of the position at a distance of underlying blast furnace raw material 1 is surveyed in the top of the side wall surface 10c of 11 induced material of hang plate
Amount, to detect the height of the top P of heap.Laser range finder can also be in a manner of arranging on the inclined direction in hang plate 11
Configure top P that are multiple, and detecting according to the detected value that multiple laser range finder detects heap.For example, to be formed along being intended to
The inclined-plane of constructional surface measure distance, and the position that the extended line of the multiple points detected is intersected with 10 wall surface of furnace top bin
It is considered as the height of the top P of heap.In Fig. 1, to rangefinder be two situations illustrate but it is also possible to be three with
On.
It's not limited to that for the structure of vertex determination unit 13.For example, being found out in advance to furnace top bin 10 according to experiment, theory
Input amount, weight, the relationship with the height of the top P for 1 heap of blast furnace raw material accumulated of the blast furnace raw material of investment, opposite furnace roof
Input amount that feed bin 10 is put into, the weight of furnace top bin 10 inferred with the top P of the heap accumulated according to above-mentioned relationship,
Therefore, it is determined that the height of top P.
The variation for the height that inclination angle adjustment section 14 and above-mentioned vertex determination unit 13 determine is accordingly by above-mentioned hang plate
11 tiltangleθ is changed in a manner of continuously or intermittently becoming smaller, and is determined to inducing blast furnace raw material to vertex
The wall surface position of the above-mentioned furnace top bin 10 of the identical height of the height that portion 13 determines or induce to be located at the wall surface position with
From the wall surface position of the range of the position of the wall surface position with preset surplus upward.
Above-mentioned surplus maximum is set as 1m.This is because confirmed that if the height apart from top P is the range within 1m, then
By with collision with wall and unfavorable condition caused by springing back is smaller.Surplus is preferably 0.5m.
Here, according to experiment or theory, the blast furnace raw material for falling and abutting with hang plate 11 is induced along hang plate 11, into
And it will be found out in association from the free-falling track of hang plate 11 with tiltangleθ.Then, it finds out tiltangleθ and is inclined by plate
The relationship for the mean place that the blast furnace raw material and wall surface of 11 inductions abut, and storage unit is stored in states such as table, relational expressions.
Then, information of the inclination angle adjustment section 14 based on storage unit can determine blast furnace raw material to vertex to find out
The tiltangleθ of the wall surface position induction of the above-mentioned furnace top bin 10 of the identical height of the height that portion 13 determines, and be somebody's turn to do with becoming
The mode of the tiltangleθ found out changes the tiltangleθ of hang plate 11.Since hang plate 11 has the induction of blast furnace raw material
It changes, it is advantageous to find out the wall of the above-mentioned furnace top bin 10 of height more identical than the height determined with vertex determination unit 13
Tiltangleθ of the position of for example high 10cm~20cm in face position as target, and blast furnace raw material is induced.The tune at inclination angle
It is whole continuously to implement within the regulation sampling time, regulation or more variation can also occur just whenever the height change of top P
It is changed.
Inclination angle adjustment section 14 is being determined as that into furnace top bin 10, investment has preset initial stage input amount or more
Blast furnace raw material starts to play a role in the case where being stored.For example, detecting the increased of raw material layer in vertex determination unit 13
In the case of, it is judged to having stored the blast furnace raw material of initial stage input amount or more in furnace top bin 10.In addition it is also possible to using to furnace
The weight in liftout storehouse 10 calculate and the increase by detecting weight corresponding with initial stage input amount has been stored just to be judged as
Other means such as blast furnace raw material more than phase input amount, are judged as the blast furnace raw material for having stored initial stage input amount or more.
Here, in the initial stage input amount of the input amount of raw material layer, the height that is put into initial 1/10 or more range
Furnace raw material is the ore raw materials not comprising coke.Initially the blast furnace raw material in the region in investment furnace top bin 10 is in initial stage from furnace
Liftout storehouse discharge, to be encased in the central part of blast furnace dimensionless radius.On the other hand, it needs to improve ore using mixing coke
The reactive of layer is the more ore layer middle part of ore amount.Accordingly, it is desirable to which the mid-term mixing for mixing coke in discharge is most.
This is because discharge initial stage needs to reduce mixed coke.Therefore, it is desirable to not include mixing coke at raw material discharge initial stage.This
Sample becomes the layer that the earlier part including outlet 10b in furnace top bin 10 has only accumulated ore raw materials.In such case
Under, it is stored for after being abutted with hang plate 11 once, the thicker ore of partial size is mainly analysed and store to outlet 10b lateral deviation as a result,
It deposits.It is also possible to the 1/2 of initial stage input amount, is further entirely the ore raw materials not comprising coke.
In addition, the tiltangleθ of hang plate 11 initial stage angle relative to horizontal direction is set as 45 degree.In addition, in this reality
It applies in mode, if it is determined that being tiltangleθ less than 25 degree, then terminates to be packed into blast furnace raw material to furnace top bin 10.The dress of blast furnace raw material
Enter termination condition also to have no relations using other conditions.
But in the case where tiltangleθ is excessive, there is the worry of no normal direction wall surface induced material.On the contrary, if inclination angle
θ is too small, then there are raw material and be also easy to fall specified amount or more from the side of tiltangleθ, and speed of fall it is insufficient and can not
To the worry of wall surface induced material.According to the viewpoint, in the present embodiment, tiltangleθ is set as to 45 degree to 25 degree of range.
In addition, the more high then tiltangleθ of heap is smaller, as a result, in the present embodiment, terminate as being packed into the case where using less than 25 degree.
(other movements)
In recent years, it when carrying out blast furnace operating, suitably carries out being packed into size distribution in the furnace of object, adjust in blast furnace 20
The furnace flow distribution radially of the gas risen, and by the reduction of aeration, blast furnace raw material in furnace and the thermic load of furnace body
Etc. being set as desired state.Specifically, desired gas more flows such operation in furnace central part.Incidentally,
The operation is known as center stream direction or center stream operation.
The main ore layer by being formed in furnace of the flow distribution (hereinafter, being also only called gas flow distribution) of such gas
It is determined with the thickness of coke layer than, the size distribution of their furnaces for being adjusted when being packed into radially.In particular, having in use
Swivel chute 21 and furnace roof be configured with side by side furnace top bin 10 without bell type charging apparatus in the case where, if to the furnace roof
It is packed into blast furnace raw material in feed bin 10, then is classified on the inclined-plane of the blast furnace raw material of accumulation, generates based on the uneven of partial size.
In other words, for the blast furnace raw material on the right side fallen in furnace top bin 10, coarse grain to far from lowering position center
Portion that is, the movement of the side outlet 10b, thus.Particulate is to lowering position that is, right wall lateral deviation is analysed and accumulated, and coarse grain is to outlet 10b
Side that is, left side are segregated and accumulate.
It is former thereby, it is possible to take out blast furnace according to the sequence of coarse grain, middle grain, particulate etc. from the outlet 10b of furnace top bin 10
Material.In this way, it is by granularity taking-up and layered in blast furnace 20, so as to make coarse grain be deposited in the central part of blast furnace 20, can stablize
Ground obtains the flourishing gas flow distribution of center stream.
Here, in the case where being packed into blast furnace raw material from furnace top bin 10 to blast furnace 20, when from the furnace top bin 10 to matching
When setting swivel chute 21 in the blast furnace 20 of lower section and taking out, and to push over height on the upside of the inclined-plane of mortar shape from furnace wall side
The mode of furnace raw material compares blast furnace raw material accumulation, to pile up blast furnace raw material from the downside on the inclined-plane of mortar shape from central side
Phenomena such as mode come makes blast furnace raw material accumulation be not in the collapse of accumulation blast furnace raw material, and become desired accumulation shape
Shape.Consider the situation, be set as in the present embodiment such as under type: making the front end of swivel chute 21 on one side from the central part of furnace
It is rotated on one side to peripheral direction is movable inclined, to be packed into blast furnace raw material (loading of reversely fascinating).
That is, by make the front end of swivel chute 21 gradually fascinate and rotate towards periphery from the center of blast furnace 20 it is anti-
It is packed into fascinating, will be inclined in such a way that the lowering position of the blast furnace raw material in furnace top bin 10 is become the side wall far from outlet
Inclined plate 11 fascinates, thus blast furnace raw material size distribution as defined in obtaining.Then, it is taken out in the same manner as described above to swivel chute 21,
Coarse grain concentrates on the central part of blast furnace 20 as a result, and particulate concentrates on peripheral portion.
In addition, above-mentioned is explanation the case where obtaining the gas flow distribution of center stream prosperity, but in the meaning according to operator
In the case where not wanting to make periphery stream flourishing, it can also carry out gradually fascinating and rotating just towards center from the periphery of blast furnace 20
It is packed into fascinating, to configure coarse grain in perimeter sides.
In addition, being configured with multiple furnace top bins on the top of blast furnace 20, the blast furnace raw material of each furnace top bin 10 is according to the rules
Sequence be encased in blast furnace 20.The present invention is especially effective in the case where being packed into mixing material.
Here, in the case where vertex determination unit 13 detects the increased degree of raw material layer, in other words, in furnace top bin 10
After the blast furnace raw material for storing preset initial stage input amount or more, start the control of hang plate 11, this is because towards heap
The top P induced material of long-pending blast furnace raw material is more difficult.
Embodiment
The accumulation shape of general blast furnace raw material in blast furnace 20 is shown in Fig. 2.The stockline recorded in Fig. 2 is to become to be packed into
The position of the benchmark of blast furnace raw material is the position that datum level is packed into as raw material.By the Fig. 2 it is found that especially ore (1) is concentrated
Being deposited in dimensionless radius is near 0.3~0.7.For ore compared with coke, partial size is small by 1/3 or so, and gas is difficult to flow, by
This, needs to carry out reactive improvement to the ore of the part, and consider more effective to the part mixing coke.Ore (1) is with nothing
Dimension radius is packed into from 0 towards 1 mode, thus, it is contemplated that in order to the part mixing coke and from the initial stage of discharge towards mid-term
It is more effective that mixed raw material is discharged.
Configuration is shown in the furnace top bin 10 of the comparative example on 20 top of blast furnace in Fig. 3.In the furnace top bin 10, outlet
The blast furnace raw material of the part of " 1 " near 10b is discharged first.In addition, it is burnt that the part of " 1 " also becomes mixing in comparative example 2
Charcoal.Next, the blast furnace raw material of the part of " 2 " that are located at right above outlet 10b is discharged, thereafter, the part of " 3 " is arranged
Out.In addition, the granularity of coarse grain and blast furnace raw material is segregated to correspondingly constructional surface lower part in furnace top bin 10.Here, due to dress
The coke for entering furnace top bin 10 is greater than ore, so being segregated to the lower part of descending.That is, if coke " 2 " into Fig. 3 can be made
Part is segregated, then can concentrate mixed raw material and be encased in dimensionless radius is near 0.3~0.7.
However, in a blast furnace raw material is fitted into not with blast furnace raw material constructional surface (upper surface of the blast furnace raw material 1 of accumulation)
Top P correspondingly adjust the angle of hang plate 11 in the case where, as documented by Fig. 3, in the portion of blast furnace raw material " 3 "
Divide and also generate descending, and there is the blast furnace raw material being segregated to the part of " 3 ".
In contrast, in the present embodiment, corresponding to the top P of blast furnace raw material constructional surface in order to avoid such case
Ground controls the angle of hang plate 11, as shown in Figure 1, the opposite (farther away side) right above the outlet 10b of blast furnace raw material
Wall surface production blast furnace raw material deposit 1 top P, by towards outlet 10b formed descending in a manner of controlled.
According to the present embodiment, as shown in Figure 3, it is segregated in the past to the part of accumulation blast furnace raw material " 3 ", reduction is being arranged
The coke that latter stage is packed into out, so that the control of the loading position of mixed raw material becomes more correct.
Here, find at a distance of blast furnace raw material be packed into face blast furnace raw material be packed into position height and by mixed raw material with
Mixing opportunity STRENGTH ON COKE combined amount when ore mixes generates large effect, carries out height when changing them respectively as a result,
The operation evaluation of furnace 20.
Here, example 1~4, comparative example 2 are and blast furnace raw material constructional surface (upper surface of the blast furnace raw material 1 of accumulation)
Top P correspondingly adjusts the example in the case where the angle of hang plate 11, and comparative example 1 is to fix the tilt angle of hang plate 11
The case where for 25 degree of progress.
In addition, example 1~4, comparative example 1 are the examples for postponing the mixing opportunity of mixed path, example 1,2,4,
The case where comparative example 1 is the 1/10 of initial stage input amount for ore raw materials without containing coke, example 3 is the 2/ of initial stage input amount
10 for ore raw materials without containing coke the case where.Comparative example 2 is the case where not containing the part of ore raw materials of coke
Example.
The relationship of each example at this time and the discharge ratio in comparative example and mixing ratio is shown in Fig. 4.In addition it is shown that
The standard deviation of each degree of mixing in each invention name and comparative example.According to these it is found that in example, with comparative example phase
Than segregation is significantly inhibited.Specifically, it is known that the segregation of example 3 is minimum, is segregated in comparative example 4 maximum.Inhibiting
In the case where segregation, the coke being packed into discharge latter stage is reduced, can more correctly carry out the loading position of mixing coke
Control.
In addition, showing operating result at that time in table 1.
[table 1]
As shown in Table 1, if example 1~4 and comparative example 1 are compared, it can be seen that: with by the inclination of hang plate 11
The fixed situation (comparative example 1) in angle is compared, and the hair at the inclination angle of hang plate 11 is changed with the rising of blast furnace raw material constructional surface
The gas effciency of bright example 1~4 improves and reducing material is than reducing.
Further, according to example 1~3 and example 4 it is found that by the loading apart from raw material face as example 1~3
Height inhibits the phenomenon that in 1.0m, gas effciency mentions hereinafter, as a result, compared with the loading height apart from raw material face is greater than 1.0m
High and reducing material is than reducing.Here, as example 4, if being greater than the loading height for being packed into face apart from blast furnace raw material
1.0m, then a part of blast furnace raw material springs back to wall, and the top P of the blast furnace raw material accumulation in furnace top bin 10 is smooth and inhibits mixed
The segregation of raw material is closed, as a result, the later period is discharged in blast furnace raw material, a part of coke is discharged, and coke combined amount becomes not
Uniformly, therefore, infer that gas effciency reduces, in addition, reducing material is than rising.
According to these results, it is considered desirable to the inclination angle of hang plate 11 is changed with the rising of blast furnace raw material constructional surface,
Further, blast furnace raw material loading position is set as 1m or less.
In addition, according to example 1~4 compared with comparative example 2 it is found that even if with the rising of blast furnace raw material constructional surface come
Change the inclination angle of hang plate 11, can also by the mixing opportunity of mixed raw material with for " 0.0 " the case where compared with (comparative example 2),
So that the mixing opportunity of mixed raw material is deferred to 0.1 or more, inhibits the coke being segregated in the early stage as a result, it can be in dimensionless radius
Mixed raw material to be mixed well near 0.3~0.7, thus, it is possible to confirm the raising of gas effciency, with also former material
Expect the reduction of ratio.
According to above situation it is found that changing the inclination angle of hang plate 11 with the rising of blast furnace raw material constructional surface, and make
The mixing opportunity of mixed raw material is deferred to 0.1 or more, and thereby, it is possible to carry out the drop of the raising of gas effciency Yu reducing material ratio
It is low.
Here, the discharge ratio of blast furnace raw material is shown in Fig. 6 and the loading height apart from blast furnace raw material face is set as 1m
When hang plate 11 angle variation.In addition, persistently being filled becoming inclined part in the lower part of furnace top bin 10 to wall surface
During entering blast furnace raw material, hang plate 11 is set as constant with 45 degree.
As a result, the angle of control panel is set as constant until ratio is discharged until 20% with 45 degree, thereafter, with
Discharge ratio becomes 100%, and the angle monotone decreasing of control panel is to 25 degree.According to these situations, it is expected that making the angle of hang plate 11
Degree control is packed into ratio in blast furnace raw material and is in 20% region below, from 45 degree of monotone decreasings to 25 degree.
More than, this application claims the Japanese Patent Application 2015-108624's of priority (application on May 28th, 2015)
Full content by referring to and become a part of this disclosure.
Here, it referring to the embodiment of limited quantity and is illustrated, but interest field is not defined to this, is based on
It would have been obvious for a person skilled in the art for the change of above-mentioned disclosed each embodiment.
Description of symbols:
The blast furnace raw material of 1 ... accumulation；10 ... furnace top bins；The input port 10a ...；10b ... outlet；10c ... wall surface；11…
Hang plate；12 ... driving portions；13 ... vertex determination units；14 ... inclination angle adjustment sections；15 ... conveyer belts；16 ... ore raw materialss；
17 ... coke；20 ... blast furnaces；21 ... swivel chutes；The top P ...；The inclination angle θ ....
Claims (3)
1. a kind of device to blast furnace charging feedstock, for making to put into furnace top bin so that the blast furnace raw material being packed into blast furnace exists
It is segregated and stores in the furnace top bin,
The device to blast furnace charging feedstock is characterized in that having:
Inclined hang plate is configured in the furnace top bin, and undertaking puts into the blast furnace raw material of the furnace top bin and will
It is induced towards the wall surface in the furnace top bin；
Vertex determination unit, by detecting or inferring come the height at the top to the blast furnace raw material heap being stored in the furnace top bin
Degree is determined；And
Inclination angle adjustment section, if storing the blast furnace raw material of preset initial stage input amount or more in the furnace top bin,
The height that the inclination angle adjustment section and the vertex determination unit determine accordingly changes the inclination angle of the hang plate, thus
Blast furnace raw material is induced to the wall surface position of the furnace top bin to the identical height of the height that determines with the vertex determination unit
Set or induce to be located at the wall surface position with from the range of the position of the wall surface position with preset surplus upward
Wall surface position,
The blast furnace raw material of the amount of at least 1/10 range of the initial stage input amount initially put into is in the initial stage input amount
Ore raw materials not comprising coke.
2. the device according to claim 1 to blast furnace charging feedstock, which is characterized in that
The surplus is 1m.
3. the device according to claim 1 or 2 to blast furnace charging feedstock, which is characterized in that
For the inclination angle of the hang plate, angle of depression initial stage angle relative to horizontal direction is set as 45 degree, if it is determined that
It is the inclination angle less than 25 degree, then terminates to put into blast furnace raw material to the furnace top bin.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-108624 | 2015-05-28 | ||
| JP2015108624A JP6183412B2 (en) | 2015-05-28 | 2015-05-28 | Raw material charging equipment for blast furnace |
| PCT/JP2016/064485 WO2016190155A1 (en) | 2015-05-28 | 2016-05-16 | Apparatus for loading material into blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107614707A CN107614707A (en) | 2018-01-19 |
| CN107614707B true CN107614707B (en) | 2019-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680030286.5A Active CN107614707B (en) | 2015-05-28 | 2016-05-16 | To the device of blast furnace charging feedstock |
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| Country | Link |
|---|---|
| JP (1) | JP6183412B2 (en) |
| KR (1) | KR102062969B1 (en) |
| CN (1) | CN107614707B (en) |
| WO (1) | WO2016190155A1 (en) |
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|---|---|---|---|---|
| CN111886348A (en) * | 2018-03-28 | 2020-11-03 | 杰富意钢铁株式会社 | Blast furnace facility and method for operating blast furnace |
| CN108517382B (en) * | 2018-03-29 | 2020-02-21 | 江苏省沙钢钢铁研究院有限公司 | Device and method for achieving graded and quality-divided charging of raw fuel in blast furnace |
| EP3760744B1 (en) * | 2018-03-30 | 2023-09-06 | JFE Steel Corporation | Method for loading raw materials into blast furnace |
| JP7202860B2 (en) * | 2018-11-28 | 2023-01-12 | 株式会社Ｉｈｉポールワース | Furnace equipment |
| KR20220119154A (en) * | 2020-01-29 | 2022-08-26 | 제이에프이 스틸 가부시키가이샤 | How to charge raw materials into a blast furnace |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000178624A (en) * | 1998-12-15 | 2000-06-27 | Kawasaki Steel Corp | Furnace top bunker of blast furnace and using method thereof |
| JP2012021227A (en) * | 2010-06-18 | 2012-02-02 | Jfe Steel Corp | Method for operating blast furnace, and top bunker |
| CN102666882A (en) * | 2009-11-24 | 2012-09-12 | 杰富意钢铁株式会社 | Material segregation apparatus for blast furnace top bunker |
| CN103403193A (en) * | 2011-05-31 | 2013-11-20 | 新日铁住金株式会社 | Starting material charging device for blast furnace, and starting material charging method using same |
| JP5440077B2 (en) * | 2008-10-31 | 2014-03-12 | Ｊｆｅスチール株式会社 | Raw material charging method for bell-less blast furnace |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5861392B2 (en) | 2011-11-01 | 2016-02-16 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
-
2015
- 2015-05-28 JP JP2015108624A patent/JP6183412B2/en active Active
-
2016
- 2016-05-16 KR KR1020177032207A patent/KR102062969B1/en active IP Right Grant
- 2016-05-16 WO PCT/JP2016/064485 patent/WO2016190155A1/en active Application Filing
- 2016-05-16 CN CN201680030286.5A patent/CN107614707B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000178624A (en) * | 1998-12-15 | 2000-06-27 | Kawasaki Steel Corp | Furnace top bunker of blast furnace and using method thereof |
| JP5440077B2 (en) * | 2008-10-31 | 2014-03-12 | Ｊｆｅスチール株式会社 | Raw material charging method for bell-less blast furnace |
| CN102666882A (en) * | 2009-11-24 | 2012-09-12 | 杰富意钢铁株式会社 | Material segregation apparatus for blast furnace top bunker |
| JP2012021227A (en) * | 2010-06-18 | 2012-02-02 | Jfe Steel Corp | Method for operating blast furnace, and top bunker |
| CN103403193A (en) * | 2011-05-31 | 2013-11-20 | 新日铁住金株式会社 | Starting material charging device for blast furnace, and starting material charging method using same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6183412B2 (en) | 2017-08-23 |
| KR20170134701A (en) | 2017-12-06 |
| WO2016190155A1 (en) | 2016-12-01 |
| JP2016222960A (en) | 2016-12-28 |
| CN107614707A (en) | 2018-01-19 |
| KR102062969B1 (en) | 2020-01-06 |
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