CN107614707A - To the device of blast furnace charging feedstock - Google Patents
To the device of blast furnace charging feedstock Download PDFInfo
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- CN107614707A CN107614707A CN201680030286.5A CN201680030286A CN107614707A CN 107614707 A CN107614707 A CN 107614707A CN 201680030286 A CN201680030286 A CN 201680030286A CN 107614707 A CN107614707 A CN 107614707A
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- blast furnace
- raw material
- top bin
- furnace
- furnace top
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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
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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
- C21B7/24—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)
- Blast Furnaces (AREA)
- Manufacture Of Iron (AREA)
Abstract
The present invention relates to the device to blast furnace charging feedstock.The purpose is to improve the segregation precision for the particle segregation for intentionally making the blast furnace raw material in furnace top bin.Possess：Inclined hang plate (11), it is configured in furnace top bin (10), and the blast furnace raw material for putting into furnace top bin (10) is induced towards wall；Summit determination unit (13), the height at its top (P) to the blast furnace raw material heap being stored in furnace top bin (10) judge；And inclination angle adjustment portion (14), the change of its height determined with summit determination unit (13) accordingly change at the inclination angle (θ) of hang plate (11) towards the direction continuously or intermittently to diminish.The blast furnace raw material of the initial input of the amount of less than 1/10 scope in initial stage input amount is the ore 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 loading blast furnace raw material to blast furnace.
Background technology
In recent years, from the viewpoint of prevention global warming, it is desirable to reduce CO2。
In iron steel industry, CO2About the 70% of discharge rate is as caused by blast furnace, seeks to reduce the CO of blast furnace2Discharge rate.
CO for reducing blast furnace2For, the reducing material (coke, carbon dust, natural gas etc.) that can be used by reducing in blast furnace come
Realize.
But in the case of the reducing material used in reducing blast furnace, particularly coke, due to being ventilated in guarantee stove
Property coke reduce, so in blast furnace aeration resistance increase.That is, in general blast furnace, if from furnace roof load ore to
Up to the temperature for starting softening, then space is filled while being deformed due to the load for the blast furnace raw material for being present in 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 overall aeration of blast furnace, and rate controlling is carried out to the production efficiency of blast furnace.
It is known in order to improve the aeration resistance of fusion zone, more had using the mixed material that coke is mixed with to ore layer
Effect, in order to the ore layer mixing coke, there is many invention achievements.
Such as in patent document 1, without bell type-blast furnace, the hopper in the downstream into ore hopper loads coke simultaneously
On a conveyor to after having accumulated coke on ore, furnace top bin is loaded into, and ore is slipped with coke via rotation
Groove loads in blast furnace.In patent document 2, ore and coke are stored in furnace top bin respectively, and coke and ore are mixed simultaneously
Attach together into, thus, at the same carry out coke be generally encased in batch, the center loading batch of coke and mixing load with batch
These three secondary batches.In addition, in patent document 3, in order to prevent the unstable and central part of the melting belt shape of blast furnace operating
The reduction of neighbouring gas effciency, stable operation and the raising of the thermal efficiency are realized, and in the blast furnace raw material charging method of blast furnace
In, load after whole ores and whole coke are thoroughly mixed in stove.
In addition, for enjoy as caused by mixed material fusion zone aeration resistance minimizing effect, it is necessary in blast furnace fit
The loading position of locality control mixed material.Therefore, exploitation has the segregation skill for the blast furnace raw material for loading blast furnace roof feed bin in the past
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
Coke is segregated in storehouse, so as to control the technology on the discharge opportunity of the mixed material from blast furnace roof feed bin.
As the technology of this segregation, in patent document 4, proposition has 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, so as to intentionally make the grain of blast furnace raw material
Degree segregation.In patent document 4, record as follows：, can be in the phase by so making the blast furnace raw material particle segregation in furnace top bin
The opportunity of discharge mixed material is hoped to load coke in stove.
In addition, in patent document 5, record as follows：It could be used without the segregation of the worry of the inwall interference to furnace top bin
Cylinder is induced, and blast furnace raw material is fallen into mouth assembling near the internal face close to body of heater center, so as 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 set is segregated and loads
Device is segregated, the top in furnace top bin possesses segregation distributor, and the segregation distributor can be around the cross section of furnace top bin
The vertical axis rotation of central portion, and the above-below direction downside for accepting the blast furnace raw material loaded from top is more than the blast furnace raw material
Angle of repose.
In addition, in device described in patent document 7, abutted in the mounted inside of furnace top bin for blast furnace raw material and make it
The segregation control panel freely to fascinate of direction change is fallen, in the opposite with the face abutted for blast furnace raw material of the segregation control panel
The face distributed magnet of side, the magnet make the charge weight drop for the per unit area that blast furnace raw material accumulates to blast furnace raw material constructional surface
It is low.According to the structure, when the blast furnace raw material of supply to furnace top bin abuts with being segregated control panel, blast furnace raw material is to the segregation control
The abutting width that making sheet abuts is expanded due to the attraction of magnet.Thus, it is as follows described in patent document 7：Make blast furnace raw material
The per unit area relative to blast furnace raw material constructional surface charge weight reduce, so as to prevent constructional surface avalanche, collapse, by force
Change the segregation phenomena of the particulate and coarse grain in furnace top bin, and the blast furnace raw material from furnace top bin is discharged into size distribution
Control as desired pattern.
Patent document 1：Japanese Unexamined Patent Publication 3-211210 publications
Patent document 2：Japanese Unexamined Patent Publication 16-107794 publications
Patent document 3：Japanese Unexamined Patent Application 53-152800 publications
Patent document 4：Japanese Unexamined Patent Publication 2008-179899 publications
Patent document 5：Japanese Unexamined Patent Publication 2011-132597 publications
Patent document 6：Japanese Unexamined Patent Publication 2012-132056 publications
Patent document 7：Japanese Unexamined Patent Publication 2012-72471 publications
However, any patent document does not all consider the change of the accumulation shape for the blast furnace raw material being stored in furnace top bin.
Therefore, the precision of the segregation for the blast furnace raw material being stored in furnace top bin is correspondingly poor.
The content of the invention
The present invention is conceived to aspect as described above and completed, and the purpose is to improve intentionally to make the grain of blast furnace raw material
Spend the segregation precision of segregation.
Inventor is studied, and finds following situation：The feelings of the segregation of the granularity in furnace top bin are carried out in hang plate
Under condition, if the position at the top for the material heap being deposited in furnace top bin in top view away from furnace top bin wall, produce
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 side opposite with wall, because the descending is more long, more has
Help mix the segregation of coke, so particle segregation can be promoted.That is, with the top of heap be inclined 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：Bowed even in the position at the top for the blast furnace raw material heap being piled up in furnace top bin
Depending on observation when close to furnace top bin wall and in the presence of, when material bump against close to the heap top furnace top bin wall
During side, more than the high regulation of height than the top of heap in the case of, resilience from furnace top bin wall becomes big, turns into really
The reason for deterioration in accuracy of segregation.
That is, in order to solve problem, the device to blast furnace charging feedstock of a mode of the invention is used to make to put into furnace roof
Feed bin is to be segregated and store in the furnace top bin to the blast furnace raw material that blast furnace loads, the above-mentioned device to blast furnace charging feedstock
It is characterised by possessing：Inclined hang plate, it 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 in above-mentioned furnace top bin；Summit determination unit, it is by detecting or inferring come to storage
The height that the top of the blast furnace raw material heap in above-mentioned furnace top bin be present is judged；And inclination angle adjustment portion, if above-mentioned
Blast furnace raw material more than input amount at initial stage set in advance is stored in furnace top bin, then above-mentioned inclination angle adjustment portion and above-mentioned summit
The height that determination unit determines accordingly changes the inclination angle of above-mentioned hang plate, so as to by blast furnace raw material induce to above-mentioned summit
The wall position of the above-mentioned furnace top bin for the height identical height that determination unit determines or induce to positioned at the wall position
With the wall position of the scope from the position of the wall position with surplus set in advance upward, in above-mentioned input amount at initial stage
In initial stage input amount the blast furnace raw material of initial input of amount of at least 1/10 scope be the ore not comprising coke.
In the state of hang plate is tilted with the angle of depression of equidirectional, if being entered with hang plate to input blast furnace raw material
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.
Now, in the present invention, by the scope towards the top identical height with the heap with storage at a distance of surplus
The blast furnace raw material of wall position input induced, can by the control of the top of the heap of storage the wall position or with this
Wall close proximity, and will can be suppressed to from negative effect caused by the resilience of wall smaller.
Therefore, the blast furnace raw material of accumulation is piled up with from above-mentioned wall only uniaxially heap in the state of inclined inclined-plane
Product, can more accurately produce particle segregation.
According to the invention it is thus possible to mixed material is taken out according to the order of coarse grain, particulate from blast furnace roof, thus,
Coke can be loaded in large quantities in the optional position in blast furnace.This can realize the raising of reaction in furnace, and be related to reduction
Material than reduction.
Brief description of the drawings
Fig. 1 is to being illustrated based on the furnace top bin involved by embodiments of the present invention and device for charging material
Schematic diagram.
Fig. 2 is the figure for representing the situation example to blast furnace accumulation raw material.
The figure that the problem of Fig. 3 is the stacking states to existing blast furnace raw material illustrates.
Fig. 4 is the passage change for representing the amount from the mixing material in the blast furnace raw material of the furnace top bin discharge of upper blast furnace
Figure.
Fig. 5 is the figure for the standard deviation for representing each degree of mixing in example and comparative example.
Fig. 6 is the figure illustrated with the passage change of time to hang plate.
Embodiment
Next, embodiments of the present invention are illustrated referring to the drawings.
Here, accompanying drawing is that schematical figure, size etc. is different from reality.In addition, embodiment pair described below
Structure for the technological thought of the present invention to be embodied is illustrated, and construction of technological thought of the invention etc. is not defined as
Following construction etc..The technological thought of present invention energy in the technical scope of the claim defined described in claims
Enough apply various changes.
(structure)
As shown in figure 1, to the device of blast furnace charging feedstock possess furnace top bin 10, be configured in furnace top bin 10 can
Drive division 12, summit determination unit 13 and the inclination angle that the hang plate 11 that fascinates, the tiltangleθ to hang plate 11 are changed
Adjustment portion 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 in upper end formed with input port 10a, and in bottom
Secund formed with outlet 10b.In Fig. 1, formed on the left of outlet 10b deviations.
Moreover, the input port 10a of furnace top bin 10 blast furnace raw material is transported to by conveyer belt 15 from input port 10a to stove
It is put into successively in liftout storehouse 10.
Here, as shown in figure 1, blast furnace raw material on conveyer belt 15 is to accumulate ore 16 in lower floor and be accumulated thereon
The state of coke 17 is conveyed.But the part for putting into initial stage for being put into furnace top bin 10, turn into ore 16
On do not accumulate the state of coke 17, so as to which initially, input has (Fig. 1 of ore 16 of ormal weight only into furnace top bin 10
" 1 " part).Thereby, it is possible to the initial blast furnace raw material devoted in furnace top bin 10 is only set into ore.Its
Afterwards, the mixed material for being set as forming the mixing material from ore 16 and coke 17 puts into (Fig. 1 into furnace top bin 10
" 2 " and " 3 " part).It is the ores such as sintering deposit, lump ore stone, pellet in addition, as ore 16.
Hang plate 11 is configured at from the lower section for the position that the blast furnace raw material of input port 10a inputs is fallen, and is thrown from input port 10a
The blast furnace raw material entered abuts with the upper surface of hang plate 11.
The hang plate 11 tilts with having the defined angle of depression relative to horizontal direction, the incline direction in top view,
Tilted in a manner of being located remotely from the wall 10c sides of the outlet 10b furnace top bin 10 of side downward.In Fig. 1, incline
The wall 10c of swash 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 set the rising portions (not shown) erected upward in the width both sides of hang plate 11, make
Blast furnace raw material is difficult to both sides in the width direction and trickled down.
Hang plate 11 has the axle portion towards left and right by axle, and is supported on furnace top bin 10 via the axle portion.Then, tilt
Plate 11 can fascinate using the axle portion as rotary shaft.
Make axle portion carry out the drive division 12 of axle rotation to be connected with the axle portion.Drive division 12 is for example made up of stepper motor.Should
Drive division 12 is located at the outside of furnace top bin 10.
Summit determination unit 13 is by detecting or inferring come the top to the heap of blast furnace raw material 1 being deposited in furnace top bin 10
The device that P height is judged.
Here, in Fig. 1, blast furnace raw material is induced towards right side, thus, be stored in blast furnace raw material 1 in furnace top bin 10 with
The mode that the top P of blast furnace raw material 1 is inclined 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, the top P of the heap of blast furnace raw material 1 height can be detected.
The summit determination unit 13 of present embodiment is made up of rangefinders such as laser range finders.Summit determination unit 13 is configured at use
The top of the wall 10c sides of the induced material of hang plate 11, the distance of the position at a distance of underlying blast furnace raw material 1 is surveyed
Amount, so as to detect the top P of heap height.In a manner of laser range finder can also be arranged on the incline direction in hang plate 11
Configure multiple, and the detected value detected according to the plurality of laser range finder detects the top P of heap.For example, to be formed along being intended to
Constructional surface inclined-plane measurement distance, and the position that the extended line of the multiple points detected is intersected with the wall of furnace top bin 10
It is considered as the top P of heap height.In Fig. 1, be to rangefinder the situation of two illustrate but it is also possible to be three with
On.
The structure of summit determination unit 13 is not limited to this.For example, obtained in advance to furnace top bin 10 according to experiment, theory
The input amount of the blast furnace raw material of input, weight, with the relation for the top P of the heap of blast furnace raw material 1 height accumulated, to furnace roof
Input amount that feed bin 10 is put into, the weight of furnace top bin 10, the top P of heap with being accumulated according to above-mentioned relation inferred,
So as to judge top P height.
The change for the height that inclination angle adjustment portion 14 determines with above-mentioned summit determination unit 13 is accordingly by above-mentioned hang plate
11 tiltangleθ is changed in a manner of continuously or intermittently diminishing, and is judged so as to which blast furnace raw material is induced to summit
The wall position of the above-mentioned furnace top bin 10 for the height identical height that portion 13 determines or induce to positioned at the wall position with
From the wall position of the scope of the position of the wall position with surplus set in advance upward.
Above-mentioned surplus maximum is set to 1m.Because confirm that if the height apart from top P is the scope within 1m, then
As with collision with wall and unfavorable condition is smaller caused by resilience.Surplus is preferably 0.5m.
Here, according to experiment or theoretical, the blast furnace raw material for falling and being abutted with hang plate 11 is induced along hang plate 11, is entered
And it will be obtained in association from 11 free-falling track of hang plate with tiltangleθ.Then, tiltangleθ is obtained, with being inclined by plate
The relation for the mean place that the blast furnace raw material and wall of 11 inductions abut, and storage part is stored in states such as form, relational expressions.
Then, information of the inclination angle adjustment portion 14 based on storage part, blast furnace raw material can be judged to summit to obtain
The tiltangleθ of the wall position induction of the above-mentioned furnace top bin 10 for the height identical height that portion 13 determines, and with as this
The mode for the tiltangleθ obtained changes to the tiltangleθ of hang plate 11.Because induction of the hang plate 11 to blast furnace raw material has
Change, it is advantageous to obtain than the wall of the above-mentioned furnace top bin 10 of height identical height determined with summit determination unit 13
Tiltangleθ of for example high 10cm~20cm in the face position 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, more than regulation change can also occur just whenever top P height change
It is changed.
Inclination angle adjustment portion 14 is being determined as that into furnace top bin 10 input has more than input amount at initial stage set in advance
Blast furnace raw material starts to play a role in the case of being stored.For example, detect the increased of raw material layer in summit determination unit 13
In the case of, it is judged to having stored the blast furnace raw material of more than input amount at initial stage in furnace top bin 10.In addition it is also possible to using to stove
The weight in liftout storehouse 10 is calculated and is judged as having stored just by detecting the increase of weight corresponding with input amount at initial stage
Other means such as blast furnace raw material more than phase input amount, are judged as having stored blast furnace raw material more than input amount at initial stage.
Here, the initial stage of the input amount of raw material layer in input amount, the height that is put into the range of initial more than 1/10
Stove raw material is the ore not comprising coke.Initially the blast furnace raw material in the region in input furnace top bin 10 in initial stage from stove
Liftout storehouse is discharged, so as to be encased in the central part of blast furnace dimensionless radius.On the other hand, it is necessary to improve ore using coke is mixed
The reactive of layer is the more ore layer pars intermedia of ore amount.Accordingly, it is desirable to the mid-term mixing for mixing coke in discharge is most.
Because discharge needs to reduce the coke of mixing initial stage.Therefore, it is desirable to mixing coke is not included initial stage in raw material discharge.This
Sample, the earlier part including outlet 10b turned into furnace top bin 10 have only accumulated the layer of ore.In such case
Under, it is stored for after being abutted with hang plate 11 once, thus, the thicker ore of particle diameter is mainly analysed and store to outlet 10b lateral deviations
Deposit.Can also be initial stage input amount 1/2, further be entirely not comprising coke ore.
In addition, the tiltangleθ of hang plate 11 is set to 45 degree relative to the angle at initial stage of horizontal direction.In addition, in this reality
Apply in mode, if it is determined that for tiltangleθ less than 25 degree, then terminate to furnace top bin 10 loading blast furnace raw material.The dress of blast furnace raw material
Enter termination condition using other conditions also to have no relations.
But in the case where tiltangleθ is excessive, the worry of no normal direction wall induced material be present.If on the contrary, inclination angle
θ is too small, then raw material be present and also easily fallen more than ormal weight from the side of tiltangleθ, and speed of fall deficiency and can not
To the worry of wall induced material.According to the viewpoint, in the present embodiment, tiltangleθ is set to 45 degree to 25 degree of scope.
In addition, the more high then tiltangleθ of heap is smaller, thus, in the present embodiment, the situation less than 25 degree is terminated as loading.
(other actions)
In recent years, when carrying out blast furnace operating, suitably carry out loading size distribution in the stove of thing, adjust in blast furnace 20
The stove flow distribution radially of the gas risen, and by the thermic load of the aeration in stove, the reduction of blast furnace raw material and body of heater
Etc. being set to desired state.Specifically, desired gas more flows such operation in stove central part.Incidentally,
The operation is referred to as center stream sensing or center stream operation.
The main ore layer by being formed in stove of the flow distribution (following, be also only called gas flow distribution) of such gas
Thickness ratio with coke layer, the size distribution of the stove that they are adjusted when loading radially determine.Particularly, possess 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 of, if to the furnace roof
Load blast furnace raw material in feed bin 10, be then classified, produced based on the uneven of particle diameter on the inclined-plane of the blast furnace raw material of accumulation.
In other words, for falling to the blast furnace raw material on the right side in furnace top bin 10, coarse grain to away from lowering position center
Portion that is, the movement of outlet 10b sides, thus.Particulate is analysed and accumulated to lowering position that is, right wall lateral deviation, and coarse grain is to outlet 10b
Side that is, left side are segregated and accumulated.
Thereby, it is possible to take out blast furnace original in turn from the outlet 10b of furnace top bin 10 according to coarse grain, middle grain, particulate etc.
Material.So, 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, from furnace top bin 10 to blast furnace 20 load blast furnace raw material in the case of, when from the furnace top bin 10 to
When putting 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 stove 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 turn into desired accumulation shape
Shape.Consider the situation, be set as following manner in the present embodiment：Make the front end of swivel chute 21 while central part from stove
To the movable inclined one side rotation of peripheral direction, so as to load blast furnace raw material (loading of reversely fascinating).
That is, gradually fascinate and rotate by entering to exercise the front end of swivel chute 21 from the centrally directed periphery of blast furnace 20 and be anti-
Load to fascinating, the lowering position of the blast furnace raw material in by furnace top bin 10 will incline in a manner of turning into the side wall away from conveying end
Swash plate 11 fascinates, so as to obtain defined blast furnace raw material size distribution.Then, take out in the same manner as described above to swivel chute 21,
Thus, coarse grain concentrates on the central part of blast furnace 20, and particulate concentrates on periphery.
In addition, above-mentioned is the explanation for the situation for obtaining the flourishing gas flow distribution of center stream, but in the meaning according to operator
In the case of not wanting to make periphery stream flourishing, it can also carry out gradually fascinating and rotating just from the periphery of blast furnace 20 towards center
Load to fascinating, so as 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
Order be encased in blast furnace 20.The present invention is especially effective in the case where loading mixing material.
Here, in the case where summit determination unit 13 detects the increased degree of raw material layer, in other words, in furnace top bin 10
After storing blast furnace raw material more than input amount at initial stage set in advance, start the control of hang plate 11, because, towards heap
The top P induced materials of long-pending blast furnace raw material are more difficult.
Embodiment
The accumulation shape of in general blast furnace raw material in blast furnace 20 is shown in Fig. 2.Stockline described in Fig. 2 is to turn into load
The position of the benchmark of blast furnace raw material, it is to turn into the position that raw material loads reference plane.Concentrated from the Fig. 2, particularly ore (1)
It is near 0.3~0.7 to be deposited in dimensionless radius.For ore compared with coke, particle diameter is small by 1/3 or so, and gas is difficult to flow, by
This to the ore of the part, it is necessary to carry out reactive improvement, and consider more effective to the part mixing coke.Ore (1) is with nothing
Dimension radius loads 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 to discharge mixed material.
Furnace top bin 10 of the configuration in the comparative example on the top of blast furnace 20 is shown 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, in comparative example 2, the part of " 1 " also turns into mixing Jiao
Charcoal.Next, the blast furnace raw material of the part of " 2 " directly over outlet 10b is discharged, thereafter, the part of " 3 " is arranged
Go out.In addition, in furnace top bin 10, the granularity of coarse grain and blast furnace raw material is segregated to correspondingly constructional surface bottom.Here, due to dress
The coke for entering furnace top bin 10 is more than ore, so being segregated to the bottom of descending.That is, if coke " 2 " into Fig. 3 can be made
Part is segregated, then it is near 0.3~0.7 that can concentrate mixed material and be encased in dimensionless radius.
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 of, as described in Fig. 3, in the portion of blast furnace raw material " 3 "
Divide and also produce descending, and the blast furnace raw material being segregated to the part of " 3 " be present.
On the other hand, in the present embodiment, it is 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 (side farther out) directly over the outlet 10b of blast furnace raw material
Wall make the top P of blast furnace raw material deposit 1, be controlled in a manner of forming descending towards outlet 10b.
According to present embodiment, as shown in Figure 3, it was segregated in the past to the part of accumulation blast furnace raw material " 3 ", and reduced and arranging
Go out the coke of latter stage loading so that the control of the loading position of mixed material becomes more correct.
Here, find at a distance of blast furnace raw material load face blast furnace raw material load position height and by mixed material with
Mixing opportunity STRENGTH ON COKE combined amount when ore mixes produces large effect, thus, enters the height exercised when they change respectively
The operation evaluation of stove 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 of the angle of hang plate 11, and comparative example 1 is to fix the angle of inclination of hang plate 11
For the situation of 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,
Comparative example 1 be initial stage input amount 1/10 be do not contain coke ore situation, example 3 be initial stage input amount 2/
10 be the situation for the ore for not containing coke.Comparative example 2 is the situation of the part for the ore for not containing coke
Example.
The relation of each example now 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.It can be seen from these, in example, with comparative example phase
Than being segregated and significantly being suppressed.Specifically, it is known that the segregation of example 3 is minimum, is segregated in comparative example 4 maximum.Suppressing
In the case of segregation, the coke loaded in discharge latter stage is reduced, can more correctly carry out mixing the loading position of coke
Control.
In addition, operating result at that time is shown in table 1.
[table 1]
As shown in Table 1, if by example 1~4 compared with comparative example 1, can learn：With by the inclination of hang plate 11
The situation (comparative example 1) that angle is fixed 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, it can be seen from example 1~3 and example 4, by apart from the loading in raw material face as example 1~3
Highly suppress in below 1.0m, thus, compared with situation of the loading height more than 1.0m apart from raw material face, gas effciency carries
High and reducing material is than reducing.Here, as example 4, if the loading for making to load face apart from blast furnace raw material is highly more than
1.0m, then a part of blast furnace raw material spring back to wall, the top P of the blast furnace raw material accumulation in furnace top bin 10 is smooth and suppresses mixed
The segregation of raw material is closed, as a result, discharging the later stage 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 below 1m.
In addition, it can be seen from the comparison of example 1~4 and comparative example 2, even if coming with the rising of blast furnace raw material constructional surface
Change hang plate 11 inclination angle, can also by the mixing opportunity of mixed material compared with for the situation of " 0.0 " (comparative example 2),
The mixing opportunity of mixed material is deferred to more than 0.1, thus, suppress the coke being segregated in the early stage, can be in dimensionless radius
Mixed material to be mixed well near 0.3~0.7, thus, it is possible to confirm gas effciency raising, with also former material
Expect the reduction of ratio.
It can be seen from case above, the inclination angle of hang plate 11 is changed with the rising of blast furnace raw material constructional surface, and make
The mixing opportunity of mixed material is deferred to more than 0.1, thereby, it is possible to carry out the raising of gas effciency and reducing material than drop
It is low.
Here, the discharge ratio of blast furnace raw material is shown in Fig. 6 and the loading apart from blast furnace raw material face is highly set to 1m
When hang plate 11 angle change.In addition, persistently filled becoming inclined part in the bottom of furnace top bin 10 to wall
During entering blast furnace raw material, hang plate 11 is set to constant with 45 degree.
As a result, the angle of control panel is set to constant until discharging ratio untill 20% with 45 degree, thereafter, with
Discharge ratio is changed into 100%, and the angle monotone decreasing of control panel is to 25 degree.According to these situations, the angle for making hang plate 11 it is expected
Degree control loads ratio in less than 20% region in blast furnace raw material, from 45 degree of monotone decreasings to 25 degree.
More than, the Japan patent application 2015-108624's (application on May 28th, 2015) of the application CLAIM OF PRIORITY
Full content by referring to and turn into a part of this disclosure.
Here, with reference to limited quantity embodiment and be 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 reference numerals：
The blast furnace raw material of 1 ... accumulation；10 ... furnace top bins；10a ... input ports；10b ... outlets；10c ... walls；11…
Hang plate；12 ... drive divisions；13 ... summit determination units；14 ... inclination angle adjustment portions；15 ... conveyer belts；16 ... ores；
17 ... coke；20 ... blast furnaces；21 ... swivel chutes；P ... tops；θ ... inclinations angle.
Claims (4)
1. a kind of device to blast furnace charging feedstock, for making to put into furnace top bin to exist to the blast furnace raw material that blast furnace loads
It is segregated and stores in the furnace top bin,
The device to blast furnace charging feedstock is characterised by possessing：
Inclined hang plate, it 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 in the furnace top bin；
Summit determination unit, it is 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 judged；And
Inclination angle adjustment portion, if storing blast furnace raw material more than input amount at initial stage set in advance in the furnace top bin,
The inclination angle adjustment portion accordingly changes the inclination angle of the hang plate with the height that the summit determination unit determines, so as to
Blast furnace raw material is induced to the wall position of the furnace top bin to the height identical height determined with the summit determination unit
Put or induce to positioned at the wall position and the scope from the position of the wall position with surplus set in advance upward
Wall position,
In the input amount at initial stage initial stage input amount the blast furnace raw material of initial input of amount of at least 1/10 scope be
Ore not comprising coke.
2. the device according to claim 1 to blast furnace charging feedstock, it is characterised in that
The surplus is 1m.
3. the device according to claim 1 or 2 to blast furnace charging feedstock, it is characterised in that
In the state of the adjustment at inclination angle is carried out by the inclination angle adjustment portion, the blast furnace put into the furnace top bin is former
Material is the mixed material of ore and coke.
4. according to the device according to any one of claims 1 to 3 to blast furnace charging feedstock, it is characterised in that
For the inclination angle of the hang plate, the angle of depression is set to 45 degree relative to the angle at initial stage of horizontal direction, 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 true CN107614707A (en) | 2018-01-19 |
| CN107614707B 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 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6183412B2 (en) |
| KR (1) | KR102062969B1 (en) |
| CN (1) | CN107614707B (en) |
| WO (1) | WO2016190155A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111989411A (en) * | 2018-03-30 | 2020-11-24 | 杰富意钢铁株式会社 | Method for charging raw material into blast furnace |
| CN113167535A (en) * | 2018-11-28 | 2021-07-23 | 株式会社保罗伍斯Ihi | Furnace roof device |
| CN115023508A (en) * | 2020-01-29 | 2022-09-06 | 杰富意钢铁株式会社 | Method for charging raw material into blast furnace |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| 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 |
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| 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 |
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| JP5861392B2 (en) | 2011-11-01 | 2016-02-16 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
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2015
- 2015-05-28 JP JP2015108624A patent/JP6183412B2/en active Active
-
2016
- 2016-05-16 WO PCT/JP2016/064485 patent/WO2016190155A1/en active Application Filing
- 2016-05-16 CN CN201680030286.5A patent/CN107614707B/en active Active
- 2016-05-16 KR KR1020177032207A patent/KR102062969B1/en active IP Right Grant
Patent Citations (5)
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| 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 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US11940215B2 (en) | 2018-03-28 | 2024-03-26 | Jfe Steel Corporation | Blast furnace apparatus and operation method for blast furnace |
| CN111989411A (en) * | 2018-03-30 | 2020-11-24 | 杰富意钢铁株式会社 | Method for charging raw material into blast furnace |
| CN111989411B (en) * | 2018-03-30 | 2022-07-08 | 杰富意钢铁株式会社 | Method for charging raw material into blast furnace |
| US11680748B2 (en) | 2018-03-30 | 2023-06-20 | Jfe Steel Corporation | Method for charging raw materials into blast furnace |
| CN113167535A (en) * | 2018-11-28 | 2021-07-23 | 株式会社保罗伍斯Ihi | Furnace roof device |
| CN113167535B (en) * | 2018-11-28 | 2024-01-16 | 株式会社保罗伍斯Ihi | Furnace top device |
| CN115023508A (en) * | 2020-01-29 | 2022-09-06 | 杰富意钢铁株式会社 | Method for charging raw material into blast furnace |
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 |
| CN107614707B (en) | 2019-07-30 |
| KR102062969B1 (en) | 2020-01-06 |
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