CN107849633A - The manufacture method of sintering deposit - Google Patents
The manufacture method of sintering deposit Download PDFInfo
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- CN107849633A CN107849633A CN201680044876.3A CN201680044876A CN107849633A CN 107849633 A CN107849633 A CN 107849633A CN 201680044876 A CN201680044876 A CN 201680044876A CN 107849633 A CN107849633 A CN 107849633A
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- sintering
- manufacture method
- sintering deposit
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- micro mist
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/12—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating drums
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/14—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating dishes or pans
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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- Manufacture And Refinement Of Metals (AREA)
- Glanulating (AREA)
Abstract
To provide the manufacture method of sintering deposit, it can produce appropriate quasi particle, improve the productivity ratio in sintering machine the problem of the present invention in the case where micro mist shape iron ore to be used as to sintering deposit manufacture and coordinates raw material.The solution of the present invention is to be sintered after raw materials for sintering is granulated by sintering machine so as to obtain the method for sintering deposit, wherein, the raw materials for sintering of the micro mist shape iron ore of less than 125 μm comprising 10~50 mass % is handled in advance by high-speed stirring apparatus, then, it is granulated by prilling granulator.
Description
Technical field
The present invention relates to the manufactures such as DL formula sintering machines, sintering deposit as blast furnace raw material are used after being granulated to raw materials for sintering
Manufacture method.
Background technology
Sintering deposit can be manufactured so：(125~1000 μm or so are commonly known as to the powdery iron ore of a variety of brands
Raw materials for sintering (sinter feed)) in, it is appropriate respectively to coordinate auxiliary material (lime stone, quartzite, serpentine etc.), miscellaneous raw material
The solid fuel such as powder (dust, oxide skin (scale), returning mine) and powdered coke, coordinate raw material to thus obtained sintering
Middle addition moisture simultaneously mix-be granulated, and the granulating raw material of gained is loaded into sintering machine and burnt till.Generally, above-mentioned sintering
Coordinate raw material by assembling each other so as to form quasi particle (quasi-particles) when being granulated containing moisture.In addition, work as
When this sintering granulating raw material for foring quasi particle is enclosed on the pallet (pallet) of sintering machine, it is played
Ensure that raw materials for sintering loads the effect of the good ventilation of layer so that sintering reaction is smoothly carried out.
However, in recent years, sintering powdery iron ore with the exhaustion of high-quality iron ore and grade increasingly reduces.That is,
The low grade of iron ore causes slag composition increase, the trend of micronizing, therefore, by the increase of alumina content, micro mist ratio
The increase of rate and cause be granulated property reduce.On the other hand, as the sintering deposit used in blast furnace, iron liquid is manufactured from by blast furnace
The reduction of manufacturing cost, CO2, it is necessary to low clinker ratio, high being reduced property, high intensity from the viewpoint of the reduction of yield is such
Sintering deposit.
Among above-mentioned such environment around sintering powdery iron ore, following technologies, the skill are recently proposed
Art is used for the micro mist shape using difficult granulation property being referred to as pellet feed (pellet feed), being used in pellet purposes
Iron ore manufactures the sintering deposit of high-quality.For example, one of such existing technology includes Hybrid Pelletized
Sinter methods (Hybrid pelletized sinter method, hereinafter referred to as " HPS methods ").This technology is following such technologies：Mixed using drum-type
Conjunction machine and comminutor, raw material is coordinated to be granulated the sintering comprising micro mist shape iron ore as a large amount of pellet feeds, thus,
Manufacture sintering deposit (patent document 1, patent document 2, patent document 3, patent document 4, patent of the low clinker than high being reduced property
Document 5).
In addition, it is also proposed that following proposal：Before raw materials for sintering powder granulating working procedure, carried out by high speed rotary blender
The method (patent document 6) of damping mixing；Before granulating working procedure, by stirring mixer by micro mist shape iron ore and Magnetite (processed)
The method (patent document 7) that dirt is pre-mixed；Micro mist (pellet feed) is pre-mixed by processing by Eirich mixers, then
The method (patent document 8) being granulated by drum mixer；It is being less than 250 μm of grain by the particle diameter comprising more than 60 weight %
After the iron ore material of son is kneaded, pass through the method (patent document 9) of drum mixer granulation；Etc..
Prior art literature
Patent document
Patent document 1：Japanese Patent Publication 2-4658 publications
Patent document 2：Japanese Patent Publication 6-21297 publications
Patent document 3：Japanese Patent Publication 6-21298 publications
Patent document 4：Japanese Patent Publication 6-21299 publications
Patent document 5：Japanese Patent Publication 6-60358 publications
Patent document 6：Japanese Unexamined Patent Application 60-52534 publications
Patent document 7：Japanese Unexamined Patent Publication 1-312036 publications
Patent document 8：Japanese Unexamined Patent Publication 7-331342 publications
Patent document 9：Japanese Unexamined Patent Publication 2001-247020 publications
The content of the invention
The invention problem to be solved
However, for the micro mist shape such as pellet feed iron ore, especially for the burning for including a large amount of ultra micro powdery iron ores
For knot coordinates raw material, they are being granulated or used using the HPS methods as described in above-mentioned patent document 1~5
Homogenizer etc. as described in above-mentioned patent document 6~9 in advance carry out mixed processing method in, exist it is following this
The problem of sample.
That is, as shown in figure 1, in these methods, can not only generate particulate (being less than 0.5mm), can also generate many thick
The quasi particle of (being more than 10mm).This is because, for micro mist shape iron ore as pellet feed, when wetability is identical
When, particulate specific surface area is bigger, therefore is easy to absorb moisture, and is easy to keep many moisture between powder, therefore, respectively
Individual micro mist shape iron ore becomes prone to preferential absorption moisture.As a result, easily generate micro mist each other only simple aggregation and formed
Particle, the inconsistent thick quasi particle of the form of micro mist, particle diameter is attached with around nuclear particle.In addition, above-mentioned
In these methods, following such problems also be present：The problem of powder adheres to；Micro mist, moisture it is dispersed bad, and set
The standby rate of capacity utilization reduces.
Above-mentioned aspect can also be by following experiments that present inventor is carried out and clear and definite.First, in the experiment
In, use the micro mist shape iron ore (content of vanadium containing the difficult granulation property such as pellet feed：40 mass %) cooperation raw material made
Grain, now, is measured to the size distribution of granulation particle (quasi particle) and the size distribution of pellet feed of generation.Tied
Fruit is shown in Fig. 2.First, as shown in Fig. 2 (a), compared with the situation without pellet feed, containing a large amount of in sintering coordinates raw material
In pellet feed situation, the ratio for turning into coarse grain (being more than 8mm) uprises.Its part by weight reaches 75 mass % or so.In addition, make
The size distribution (Fig. 2 (b)) of pellet feed in quasi particle obtained by grain shows size distribution (Fig. 2 with being granulated particle
(a)) identical trend.I.e., it is thus understood that for the pellet feed in coarse grain, its ratio is up to 80 mass % or so, almost
All pellet feeds are locally lain in the coarse grain.It follows that so-called thick quasi particle, is that pellet feed is assembled each other
Formed together.In addition, have the further insight that the amount of moisture for the above-mentioned quasi particle for belonging to coarse grain region is also high (Fig. 2 (b)).By
This understands that pellet feed preferential absorption moisture, therefore, pellet feed flock together so as to form thick quasi particle each other,
As a result, many moisture will be absorbed in thick quasi particle.
For the cooperation raw material that above-mentioned such pellet feed etc. includes many micro mist shape iron ores, if being made
Grain, then particle diameter anyway can not be consistent, and micro mist is only simple assembled each other, is combined by force so as to become prone to generation
Spend weak thick quasi particle.Therefore, if loading on the pallet of sintering machine and being accumulated quasi particle as described above,
Then as shown in Fig. 3 (a), raw materials for sintering loads the packed structures that layer forms densification, and bulk density becomes big.If also, by it is above-mentioned this
The thick quasi particle of sample is deposited on the pallet of sintering machine with certain thickness, then when to quasi particle application load
It is easily broken when (compression stress), therefore, efflorescence occurs so as to cause porosity to reduce and then cause aeration to deteriorate, turns into
Hinder the principal element of operation of sintering machine.As a result, sintering time may yield rate elongated, that cause sintering deposit reduce,
So as to which productivity ratio reduces.In addition, it has to the binding agent i.e. usage amount of quick lime that increase uses in being granulated, cause sintering deposit
Manufacturing cost increase, in subsequent handling, when solid fuels such as coated powdered cokes, cause for raw materials for sintering integrally and
The existences such as speech, powdered coke are uneven.As a result, cause to burn, hot bad so that burning till speed reduction.
It is an object of the present invention to a kind of manufacture method of sintering deposit is proposed, wherein, micro mist shape iron ore is being used as burning
When tying ore deposit manufacture with raw material is coordinated, appropriate quasi particle can be produced, so as to improve productivity ratio in sintering machine.
Means for solving the problems
Further investigation has been repeated to problem possessed by foregoing prior art in present inventor, as a result finds,
Prior processing based on high-speed stirring apparatus is carried out by the raw materials for sintering of the micro mist to the designated size with ormal weight, by
This, during granulation after this, can suppress the hair for the thick granulation particle (quasi particle) that particle diameter is inconsistent and bond strength is weak
It is raw, appropriate quasi particle can be produced, so as to improve the productivity ratio in sintering machine, thus have developed the present invention.
That is, the present invention is the manufacture method of sintering deposit, it is characterised in that the manufacture method of the sintering deposit is to sinter
Raw material is sintered so as to obtaining the method for sintering deposit after being granulated by sintering machine, wherein, by high-speed stirring apparatus to comprising 10~
The raw materials for sintering of the micro mist shape iron ore of less than 125 μm of 50 mass % is handled in advance, then, is carried out by prilling granulator
It is granulated.
It should be noted that in the manufacture method of the sintering deposit of the present invention formed in the above described manner, it is contemplated that
Following solution is as preferable solution.
(1) when the peripheral speed U (m/ seconds) of the blade relative to above-mentioned high-speed stirring apparatus will utilize above-mentioned high-speed stirring
When mixing the mixing time of device and being set to t (second), to meet 300<U×t<The mode of 2000 condition is handled in advance；
(2) when the peripheral speed U (m/ seconds) of the blade relative to above-mentioned high-speed stirring apparatus will utilize above-mentioned high-speed stirring
When mixing the mixing time of device and being set to t (second), to meet 400<U×t<The mode of 1200 condition is handled in advance；
(3) above-mentioned prilling granulator is drum mixer and/or granulating disc；
(4) in the granulation of above-mentioned prilling granulator, lime stone is coated to the raw material through processing, to the table of the particle of the granulation
Face is coated to solid system fuel；
(5) at least one or more in above-mentioned raw materials for sintering includes crystal water ore, and the content of the crystallization water is 4 matter
Measure more than %；
(6) more than 5 mass % lime stone is included in above-mentioned less than 125 μm of micro mist shape iron ore；
(7) in the raw materials for sintering handled by above-mentioned homogenizer, in addition to coated lime stone, 3 matter are added
Measure below % white lime or quick lime；
(8) among the raw materials for sintering used in above-mentioned homogenizer, when the ratio of micro mist shape iron ore is 30 matter
When measuring more than %, raw material is dried processing.
Invention effect
The present invention proposes the manufacture method of following such sintering granulating raw materials, and the sintering granulating raw material includes
The aggregation or micro mist shape iron ore is attached with around nuclear particle that micro mist shape iron ore and particulate are assembled and formed securely
The construction of stone etc., particle diameter are than more consistent and small size distribution quasi particle.For sintering resulting by this method
For granulating raw material, when on the pallet for being loaded into sintering machine, the sintering formed on pallet can be reduced
Raw material loads the density of layer, can shorten firing time with the raising of aeration, and then to improving high-quality sintering deposit
It is effective for productivity ratio.
Brief description of the drawings
[Fig. 1] is the comparison chart of the size distribution of the quasi particle in the presence or absence of micro mist shape iron ore cooperation.
[Fig. 2] is the figure that the distribution of pellet feed and the scattered situation of moisture are shown according to the particle diameter of accurate (granulation) particle
Table.
[Fig. 3] is existing granulation build-up of particles layer (a) and the comparison figure of the granulation build-up of particles layer (b) of the present invention.
[Fig. 4] is an example for illustrating the equipment line of the manufacture method for the sintering deposit for implementing the present invention
Figure.
The figure for the equipment line that [Fig. 5] uses for the influence for illustrating to investigate the prior processing before being granulated.
[Fig. 6] is the chart for showing the relation between harmonic mean particle diameter and additional incorporation time.
[Fig. 7] is the chart for showing the relation between particle size distribution function and additional incorporation time.
[Fig. 8] is the chart for showing the relative relation by between air quantity and additional incorporation time.
[Fig. 9] is following such charts, it illustrates the condition that peripheral speed U is fixed on to the U=9m/ seconds, in t=0
When changing mixing time t in the range of~240 seconds, the relation between productivity ratio and (U × t).
[Figure 10] is following such charts, it illustrates the condition that mixing time t is fixed on to the t=120 seconds, in U=0
When changing peripheral speed U in the range of the~18m/ seconds, the relation between productivity ratio and (U × t).
[Figure 11] is following such charts, it illustrates the condition that peripheral speed U is fixed on to the U=9m/ seconds, in t=0
When changing mixing time t in the range of~240 seconds, the relation between productivity ratio and (U × t).
[Figure 12] is following such charts, it illustrates the relation of (U × t) between productivity ratio in U<8m/ seconds and U >=
Dispersity in the case of the 8m/ seconds.
Embodiment
<Feature item on the present invention is the prior processing ＞ before being granulated
Fig. 4 is the figure for illustrating an example of the equipment line of the manufacture method for the sintering deposit for implementing the present invention.
Reference picture 4 illustrates to the manufacture method of sintering deposit of the present invention, first, prepare 125 μm comprising 10~50 mass % with
Under micro mist shape iron ore raw materials for sintering 11.Except above-mentioned 10~50 mass % less than 125 μm of pellet feed, as tail
The micro mist shape iron ore of ore deposit, remaining part are beyond the powdery iron ore as raw materials for sintering (sinter feed), and raw materials for sintering 11 is also
Preferably comprise return mine, other raw materials such as quartzite, lime, quick lime.It should be noted that in the present invention, it is former as sintering
Why material 11, be defined to include 10~50 mass % less than 125 μm of micro mist shape iron ore, and reason is as follows.
That is, the invention scope of above-mentioned micro mist shape iron ore is due to produce the thick grain that particle diameter is inconsistent and bond strength is weak
It is sub and setting, when less than 10%, it cannot get weak quasi particle of bond strength etc., and when more than 50%, existing to produce
The problem of bond strength same weak oversize grain, but substantially without less than 125 μm of the micro mist coordinated more than 50 mass %
Shape iron ore, the upper limit is set to 50%.The reasons why particle diameter is set into less than 125 μm is as follows：When particle diameter is less than 125 μm, table
Show the adhesive force increase of the mutual cementability of particle layer in the powder filled layer added with moisture, so as to show that granulation property is big
Different behavior, therefore, the limit for being set to granularity by 125 μm.
Next, implement the prior processing of prepared raw materials for sintering 11 by homogenizer 12.Homogenizer 12
Purpose be that in order to suppress the generation of thick granulation particle, and (it turns into thick by the aggregation of micro mist before granulation
It is granulated the kind (nuclear) of particle) it is broken.In order to efficiently crush the aggregation of micro mist, effectively microscopically to aggregation
Body itself applies shearing force, so as to directly peel off micro mist.As an example of homogenizer 12, for example, can use
Eirich mixers (Japanese Eirich systems), Perret Gaia mixers (Beichuan ironworker system), Proshare mixers are (peaceful
Foreign machine work) etc..Wherein, Eirich mixers are known as " high-speed stirred granulation " machine, are to have the particle as caused by being crosslinked liquid concurrently
Aggregation, along with growth granulation function equipment.
Next, under moisture addition, by drum mixer 13 to having carried out prior processing by homogenizer 12
Raw materials for sintering 11 be stirred mixing, so as to be granulated.Raw materials for sintering 11 after granulation is supplied to sintering machine 14, in sintering machine 14
Middle formation sintering deposit.Then, sintering deposit and coke, lime stone etc. are together supplied to blast furnace 15 as blast furnace raw material, so as to make
Standby iron liquid.
In order to as the present invention it is feature, be granulated before the influence of prior processing investigate, as shown in figure 5, sharp
With high-speed stirring mixer (Eirich mixers) and drum mixer, to the micro mist shape iron ore of 125 μm comprising 30 mass %
The identical raw materials for sintering of stone implements the prior processing before being granulated.Changed in the range of 0~160 second and utilize the mixed of each mixer
The time is closed, after prior processing, by drum mixer be granulated within 160 seconds, size distribution is obtained to the raw materials for sintering of gained,
On this basis, Is, Ip by being defined with following formula are obtained, by respective harmonic mean particle diameter Dp (mm), particle size distribution function
The relative of packed layer is shown in Fig. 6, Fig. 7 and Fig. 8 by air quantity before Isp and sintering.It should be noted that in arbitrary examples,
Conventional example is used as using by the use of the example that the prior processing of drum mixer is 0 second.By the use of high-speed stirring mixer, reconcile
Average grain diameter increase, has obtained the effect that the size distribution based on particle size distribution function Isp becomes sharp.Pass through wind for relative
For amount, the increase effect that also obtains.Here, it is relative bigger by the value of air quantity, it can more increase and be grasped with certain negative pressure
Gas flow in the sintering machine of work, productivity ratio uprise.
Dp=1/ Σ (wi/di)
Isp=100 √ (Is × Ip)
Is=Dp2Σwi(1/di-1/Dp)2
Ip=(1/Dp)2Σwi(di-Dp)2
Wherein,
Dp：Harmonic mean particle diameter (mm)
wi：Weight existence rate (-) in section
di：The average diameter (mm) of the representative in section
Isp：Particle size distribution function
Is：Particle size distribution function (-) in particulate
Ip：Particle size distribution function (-) in coarse grain
From Fig. 6, Fig. 7 and Fig. 8 result, implement with the conventional example not handled in advance and by drum mixer
The comparative example of prior processing before granulation is compared, and the present invention of the prior processing before being granulated is implemented by high-speed stirring mixer
In example, the relative of packed layer to a high-profile and before average grain diameter (Fig. 6), low particle size distribution function (Fig. 7) and high sintering can be obtained
By air quantity (Fig. 8), the raw materials for sintering of good character can obtain.
<Preferable operating condition ＞ on homogenizer
In order to which the preferable operating condition of the homogenizer in the manufacture method of the sintering deposit to the present invention is investigated,
To the identical raw materials for sintering of the micro mist shape iron ore of 125 μm comprising 30 mass %, the high speed rotation of homogenizer is paid close attention to
Relation between the peripheral speed U (m/ seconds) and mixing time t (second) of blade.In addition, being directed to following examples, after the pelletizing, ask
Go out the productivity ratio of the sintering deposit as obtained from sintering sintering machine, and classified by (U × t)：Peripheral speed U is fixed on U
Under conditions of=9m/ the seconds, change mixing time t example in the range of t=0~240 second；Mixing time t is fixed on t=
Under conditions of 120 seconds, change peripheral speed U example in the range of U=0~18m/ seconds；Peripheral speed U is fixed on U=
Under conditions of the 6m/ seconds, changed the example of mixing time in the range of 0~240 second.
Here, as can prevent particle diameter is inconsistent and bond strength is weak thick granulation particle (quasi particle) generation,
The condition of appropriate quasi particle can be produced, is conceived to peripheral speed U and is multiplied by U × t obtained from mixing time t.As U × t
Dimension, it has following physical quantitys, and the physical quantity has length " m " dimension, it is believed that is the blade by rotating at a high speed
Caused displacement, result, it is believed that can classify by different peripheral speed and mixing time.In homogenizer
In, due to being the construction flowed out from the raw material of top input to bottom, therefore, when the certain situation of the raw material occupation rate in device
Under, when putting into speed change, mixing time changes.Now recognize, can by determining U × t in proper range
Manufacture the sintering deposit of stay in grade.
Peripheral speed U was fixed under conditions of the U=9m/ seconds and changes mixing time t in the range of t=0~240 second
When, productivity ratio (t/ hours/m2) relation between (U × t) is shown in Fig. 9 and table 1 below, mixing time t is fixed on t=
Under conditions of 120 seconds and when changing peripheral speed U in the range of U=0~18m/ seconds, productivity ratio (t/ hours/m2) and (U
× t) between relation be shown in Figure 10 and table 2 below, by peripheral speed U be fixed under conditions of the U=6m/ seconds and t=0~
In the range of 240 seconds change mixing time t when, productivity ratio (t/ hours/m2) relation between (U × t) be shown in Figure 11 and
Table 3 below.
Table 1
Table 2
Table 3
By the result of Fig. 9~Figure 11 (data based on 1~table of table 3), for U<8m/ seconds and this 2 conditions of U >=8m/ seconds,
The relation of (U × t) between productivity ratio is obtained, Figure 12 is shown in the form of scatter diagram.From Figure 12 result, arbitrary
In example, preferably meet 300 with U × t<U×t<The mode of 2000 condition is handled in advance by homogenizer, enters one
Step preferably meets 400 with U × t<U×t<The mode of 1200 condition is handled in advance by homogenizer.In any example
In son, because U × t preferred scope is almost identical, thus, it can be known that peripheral speed and mixing time for homogenizer
, can be using above-mentioned U × t scope vague generalization as preference for various examples.
In addition, from Fig. 9 result, in the prior processing of the raw materials for sintering carried out by high-speed stirring apparatus, when
When the peripheral speed U for the blade that the high speeds of high-speed stirring apparatus rotates is set into 9 (m/ seconds), preferred stirring high-speed stirring apparatus
Mixing the time is set to more than 30 seconds.In addition, from Figure 10 result, it is set to 120 seconds when by the mixing time of high-speed stirring apparatus
When, the peripheral speed U (m/ seconds) for the blade that the high speed of high-speed stirring apparatus rotates preferably is set to 6≤U≤12.In addition, by scheming
11 result is understood, in the prior processing of the raw materials for sintering carried out by high-speed stirring apparatus, when by high-speed stirring apparatus
When the peripheral speed U of blade of rotation is set to 6 (m/ seconds) at a high speed, preferably by the mixing time of high-speed stirring apparatus be set to 60 seconds with
On.
<On other preferable operating condition ＞
In the manufacture method of the sintering deposit of the present invention, except the drum-type as prilling granulator in above-described embodiment mixes
Beyond machine, can also granulating disc be used alone or be used in combination itself and drum mixer.
In addition, in the granulation of prilling granulator, it is preferred that lime stone is coated to the raw material through processing, in the granulation grain
The surface of son is coated to solid system fuel, preferably carries out so-called external coating.It is preferable why to carry out external coating, is
Due to by the way that so as in the high calcium ferrite of Surface Creation intensity, and lime stone external coating is suppressed into solid system fuel due to it
Hydrophobicity and be attached to surface so as to produce harmful effect to granulation property, thus make the increase of granulation particle diameter so as to improving productivity ratio.
In addition, as raw materials for sintering, crystal water ore preferably is included using the raw materials for sintering of at least one or more, and tie
The content of brilliant water is more than 4 mass % raw materials for sintering.Why the content of the crystallization water is set to 4 mass % above is it is preferred that
, it is due to that the specific surface area of the high ore of the crystallization water is high, it is possible to increase the granulation of fine ore stone.In addition, further preferred
It is that more than 5 mass % lime stone is included in the micro mist shape iron ore below 125 μm.Why more than 5 mass % are included
Lime stone is preferable, is due to by comprising fine lime stone, it is possible to increase the mixing between micro mist ore and lime stone
Property, being capable of acceleration of sintering reaction.
It is further preferred, that in the raw materials for sintering handled by homogenizer, in addition to coated lime stone,
Also add the white lime or quick lime below 3 mass %.It is preferred why to add white lime below 3 mass % or quick lime
, it is due to that the addition of white lime or quick lime can improve and be granulated the crushing strength of particle so as to improve raw materials for sintering packed layer
In aeration.Moreover it is preferred that in the raw materials for sintering used in above-mentioned homogenizer, when micro mist shape iron ore
When ratio is more than 30 mass %, raw materials for sintering is dried processing.Why as more than 30 mass % place is dried
Reason, is due in sintering process, moisture needs the latent heat for evaporation, by being dried in advance, can reduce required
The carbon materials such as powdered coke.
Industrial applicability
By the manufacture method of the sintering deposit of the present invention, various sintering machines can be used to be manufactured with high production rate high-grade
Sintering deposit, by the way that the sintering deposit obtained in the present invention is used as into blast furnace raw material, large-duty blast furnace operating can be carried out.
Claims (9)
1. the manufacture method of sintering deposit, it is characterised in that the manufacture method of the sintering deposit is to lead to after raw materials for sintering is granulated
Oversintering machine burning knot so as to obtain the manufacture method of the sintering deposit of sintering deposit, wherein, by high-speed stirring apparatus to raw materials for sintering
Handled, then, be granulated by prilling granulator in advance, wherein, the raw materials for sintering includes the 125 of 10~50 mass %
Micro mist shape iron ore below μm.
2. the manufacture method of sintering deposit according to claim 1, it is characterised in that when relative to the high-speed stirring apparatus
Blade peripheral speed U (m/ seconds) and when the mixing time using the high-speed stirring apparatus is set into t (second), to meet
300<U×t<The mode of 2000 condition is handled in advance.
3. the manufacture method of sintering deposit according to claim 2, it is characterised in that when relative to the high-speed stirring apparatus
Blade peripheral speed U (m/ seconds) and when the mixing time using the high-speed stirring apparatus is set into t (second), to meet
400<U×t<The mode of 1200 condition is handled in advance.
4. according to the manufacture method of sintering deposit according to any one of claims 1 to 3, it is characterised in that the prilling granulator
For drum mixer and/or granulating disc.
5. according to the manufacture method of sintering deposit according to any one of claims 1 to 4, it is characterised in that be granulated dress described
In the granulation put, lime stone is coated to the raw material through processing, solid system fuel is coated to the surface of the particle of above-mentioned granulation.
6. according to the manufacture method of sintering deposit according to any one of claims 1 to 5, it is characterised in that the raw materials for sintering
In at least one or more include crystal water ore, and the content of the crystallization water is more than 4 mass %.
7. according to the manufacture method of sintering deposit according to any one of claims 1 to 6, it is characterised in that described 125 μm with
Under micro mist shape iron ore in include more than 5 mass % lime stone.
8. according to the manufacture method of sintering deposit according to any one of claims 1 to 7, it is characterised in that passing through the height
In the raw materials for sintering of fast mixer processing, in addition to coated lime stone, below 3 mass % white lime or raw stone are added
Ash.
9. according to the manufacture method of sintering deposit according to any one of claims 1 to 8, it is characterised in that in the high-speed stirring
Among mixing the raw materials for sintering used in machine, when the ratio of micro mist shape iron ore is more than 30 mass %, raw material is dried
Processing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-158659 | 2015-08-11 | ||
| JP2015158659A JP6380762B2 (en) | 2015-08-11 | 2015-08-11 | Method for producing sintered ore |
| PCT/JP2016/069840 WO2017026203A1 (en) | 2015-08-11 | 2016-07-05 | Method for producing sintered ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107849633A true CN107849633A (en) | 2018-03-27 |
| CN107849633B CN107849633B (en) | 2019-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201680044876.3A Active CN107849633B (en) | 2015-08-11 | 2016-07-05 | The manufacturing method of sinter |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JP6380762B2 (en) |
| KR (1) | KR102085054B1 (en) |
| CN (1) | CN107849633B (en) |
| PH (1) | PH12018550011A1 (en) |
| TR (1) | TR201801470T1 (en) |
| TW (1) | TWI596213B (en) |
| WO (1) | WO2017026203A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6489092B2 (en) * | 2016-09-28 | 2019-03-27 | Ｊｆｅスチール株式会社 | Sinter ore manufacturing method and sintered ore manufacturing equipment line |
| KR102394730B1 (en) * | 2017-04-17 | 2022-05-04 | 제이에프이 스틸 가부시키가이샤 | Manufacturing method of sintered ore |
| WO2023233871A1 (en) * | 2022-06-03 | 2023-12-07 | Ｊｆｅスチール株式会社 | Method for producing granulated starting material for sintering, and method for producing sintered ore |
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2015
- 2015-08-11 JP JP2015158659A patent/JP6380762B2/en active Active
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2016
- 2016-07-05 KR KR1020187003837A patent/KR102085054B1/en active IP Right Grant
- 2016-07-05 CN CN201680044876.3A patent/CN107849633B/en active Active
- 2016-07-05 TR TR2018/01470T patent/TR201801470T1/en unknown
- 2016-07-05 WO PCT/JP2016/069840 patent/WO2017026203A1/en active Application Filing
- 2016-07-19 TW TW105122674A patent/TWI596213B/en active
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Also Published As
| Publication number | Publication date |
|---|---|
| TR201801470T1 (en) | 2018-05-21 |
| TWI596213B (en) | 2017-08-21 |
| TW201706417A (en) | 2017-02-16 |
| JP6380762B2 (en) | 2018-08-29 |
| CN107849633B (en) | 2019-09-03 |
| KR20180030596A (en) | 2018-03-23 |
| PH12018550011A1 (en) | 2018-07-09 |
| KR102085054B1 (en) | 2020-03-05 |
| JP2017036480A (en) | 2017-02-16 |
| WO2017026203A1 (en) | 2017-02-16 |
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