CN108823401A - A kind of method that Ore Sintering Process shunts granulation emission reduction NOX - Google Patents
A kind of method that Ore Sintering Process shunts granulation emission reduction NOX Download PDFInfo
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- CN108823401A CN108823401A CN201810520306.8A CN201810520306A CN108823401A CN 108823401 A CN108823401 A CN 108823401A CN 201810520306 A CN201810520306 A CN 201810520306A CN 108823401 A CN108823401 A CN 108823401A
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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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- 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
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Abstract
The invention discloses a kind of Ore Sintering Process to shunt granulation emission reduction NOXMethod, belong to sintering process pollution reduction technical field.Iron Ore Powder of the present invention by calcium ferrite generative capacity greater than 60% mixes with fuel, flux, pelletizes to obtain the mixture containing fuel, remaining iron-bearing material and flux are mixed, pelletize to obtain the mixture without fuel；The mixture containing fuel is mixed to get shunting granulation sinter mixture with the mixture without fuel again；Granulation sinter mixture particle dress will be shunted and be laid on pallet surface progress ignition sintering, granulation sinter mixture is shunted during the sintering process and promote NOXReduction, emission reduction.The present invention can be from the NO of sintered mix process reductionXIt generates, greatly reduces the pressure of the emission reduction to sintering flue gas denitration.
Description
Technical field
The invention belongs to sintering process pollution reduction technical fields, more specifically, being related to a kind of Ore Sintering Process
Shunt granulation emission reduction NOXMethod.
Background technique
NOXIt is that can also cause the generation of photochemical fog, have very strong poison to human body one of the main reason for causing acid rain
Evil effect.And steel industry NOXDischarge amount account for 10% or so of industrial total release, wherein sintering process be generate NOXMaster
One of source is wanted, NO is accounted forX50% or so of total amount.On January 1st, 2015《Steel sintering, pelletizing industrial air pollution object discharge mark
It is quasi-》Specified in NOXDischarge new standard comes into effect in existing enterprise, and sintering process is faced with huge NOXEmission reduction.
NO traditional at presentXDischarge-reducing method is mainly end treatment, and selective-catalytic-reduction denitrified technique (SCR) is 300
~450 DEG C of operating temperature section, and operating temperature of the selective non-catalytic reduction denitrating technique (SNCR) at 950~1150 DEG C
Section.However sintering flue gas is lower than the two temperature ranges, if removing NO with SCR or SNCR deviceX, then must be to sintering
Flue gas is heated, this obviously will increase denitration cost.Therefore, the denitrating technique in more economical practical sintering process
It is imperative to study.The invention proposes a kind of methods of watershed management nitrogen oxides, by the production for reducing nitrogen oxides
It is raw to mitigate sintering denitration pressure.
Chinese Patent Application No.：200710065213.2 authorized announcement date on September 12nd, 2007, invention and created name was
One kind removing NO during metallurgy sinteredXMethod, this application discloses one kind to remove NO during metallurgy sinteredX's
Method, the invention make fuel by adding fuel or half fuel in sintering production blending process, introduce coal during the sintering process
Gas, while the sintering tail gas of volume content 10~50% is returned into sintering process, utilize the reducibility gas (H in coal gas2、
CH4And CO), NOXPredecessor (NHi and HCN) and coke will be returned sintering tail gas in NOXWith burnt due to coke
The NO of generationXIt is reduced to N2, to reduce NO in sintering tail gasXConcentration.Introduced gas volume accounts for sintering gas volume total amount
1~10%, energy consumption is high, to considerably increase sintering cost, is unfavorable for promoting the use of in metallurgy sintered field.
Chinese Patent Application No.：201510533729.X authorized announcement date on August 27th, 2015, invention and created name was
A kind of Ore Sintering Process NOXThe method of emission reduction, a kind of Ore Sintering Process NO of the disclosure of the inventionXThe method of emission reduction, first will be normal
Rule sintering fuel or anthracite are sieved into three -1mm, 1~3mm ,+3mm grades；Again by -1mm fuel or anthracite and granularity
The fuel particle of 1~3mm is pressed into for the high response fossil fuel or biomass fuel of -1mm, then with 1~3mm fuel or
Anthracite, particulate iron ore, part coarse grain iron ore, flux, returning mine carries out a prefabricated grain, mixture and modified place after granulation
+ 3mm fuel or anthracite and remaining coarse grain iron ore after reason carry out secondary mixing granulation, and obtained mixture is through cloth
After lighted a fire, be sintered.This method needs sintering fuel or anthracite is sieved into size fractionated, also needs fuel being pressed into fuel
Particle, increases industrial flow, and complicated for operation in the actual production process, high production cost is unfavorable for promoting the use of.
Summary of the invention
1. technical problems to be solved by the inivention
The present invention is limited for the treatment effect of existing nitrogen oxides, it is difficult to effectively nitrogen oxides in control sintering flue gas
Emission reduction the problem of, a kind of Ore Sintering Process is provided and shunts granulation emission reduction NOXMethod, pass through change method for mixing promote iron
Sour calcium generates, the NO that calcium ferrite generates fuel combustionXIt is reacted with CO and generates N2Reaction have catalytic action, to reach control
Sintering flue gas NO processedXEmission effect.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention is：
A kind of Ore Sintering Process of the invention shunts granulation emission reduction NOXMethod, calcium ferrite generative capacity is greater than
60% Iron Ore Powder is mixed with fuel, flux, pelletizes to obtain the mixture containing fuel, by remaining iron-bearing material and flux
It mixed, pelletize to obtain the mixture without fuel；The mixture containing fuel is mixed with the mixture without fuel again
To shunting granulation sinter mixture；Granulation sinter mixture particle dress will be shunted and be laid on pallet surface progress ignition sintering,
Granulation sinter mixture is shunted during the sintering process promotes NOXReduction, emission reduction.
Preferably,
S10：Selective divided-flow granulation
S11：Prepare the mixture A containing fuel
Iron Ore Powder of the selection calcium ferrite generative capacity greater than 60%, fuel and flux, which are added in blender, to be mixed, and is made
It is standby to obtain mixing material A；Expect in A to mixing again plus water, continuation gyratory shaker expect that A pelletizes to mixing, be prepared and contain combustion
The mixture A of material；
S12：Preparation is free of the mixture B of fuel
Remaining iron-bearing material and flux are added in blender and mixed, obtains mixing material B；Again into mixing material B
Add water, continues gyratory shaker and pelletize to material B is mixed, the mixture B without fuel is prepared；
S20：Mixing granulation
The mixture A being uniformly mixed so as to obtain and mixture B will be shunted and be added in blender and continue to be mixed to get shunting granulation burning
Tie mixture.
Preferably,
S10：Selective divided-flow granulation
S11：Prepare the mixture A containing fuel
Iron Ore Powder of the selection calcium ferrite generative capacity greater than 60%, fuel and flux, which are added in blender, to be mixed, and is made
It is standby to obtain mixing material A；Expect in A to mixing again plus water, continuation gyratory shaker expect that A pelletizes to mixing, be prepared and contain combustion
The mixture A of material；
S12：Preparation is free of the mixture B of fuel
Remaining iron-bearing material and flux are added in blender and mixed, obtains mixing material B；Again into mixing material B
Add water, continues gyratory shaker and pelletize to material B is mixed, the mixture B without fuel is prepared；
S20：Mixing granulation
S21：The mixture A being uniformly mixed so as to obtain will be shunted and mixture B is added to and continues to be mixed to get separate system in blender
Grain sinter mixture；
S22：Iron-bearing material, fuel and flux are added in blender and are mixed, and mixing material C is prepared；Again to mixing
Expect in C plus water, continuation gyratory shaker are pelletized to material C is mixed, common mixture is prepared；
S30：Ignition sintering
Mat formation the shop fixtures bed of material on the top of pallet, secondly by common mixture dress be laid on shop fixtures bed of material top formed it is general
The logical bed of material；The top that shunting granulation sinter mixture dress is laid on the common bed of material is formed again and shunts the emission reduction bed of material of pelletizing, is being sintered
Granulation sinter mixture is shunted in the process promotes NOXReduction, emission reduction.
Preferably, the top that common mixture dress is laid on the shunting granulation emission reduction bed of material is formed into the common bed of material.
Preferably, S11 the specific steps are：Iron Ore Powder and flux by calcium ferrite generative capacity greater than 60%, which are added, to be stirred
It is mixed in machine, mixing continuously adds fuel into blender after completing and mixed, and obtains mixing material A after mixing.
Preferably, S11 the specific steps are：Calcium ferrite generative capacity is greater than to 60% Iron Ore Powder, flux and additive
Be added blender in mixed, wherein in additive include return mine, mix complete after continuously added into blender fuel into
Row mixes, and obtains mixing material A after mixing.
Preferably, the quality of lime is M in flux in mixture A, and numerical value is calculated with following formula：
Wherein, Ai：The quality (kg) of i-th kind of mine；Xi：The calcium ferrite of i-th kind of Iron Ore Powder generates mass percent；Y：Reaction
It generates calcium silicates and accounts for SiO2Ratio；SiO2Quality (kg)；Wherein the value of α is：0.35~0.50；The value of β is
0.94~1.10.
Preferably, described return mine is returned mine for fine grinding, and -100 mesh percent of pass that fine grinding is returned mine are 80%.
Preferably, described return mine is returned mine for fine grinding, fine grinding return mine by select particle for 3~5mm return mine carry out it is thin
Mill obtains fine grinding and returns mine
Preferably, remaining iron-bearing material includes Iron Ore Powder of the calcium ferrite generative capacity less than or equal to 60%, the miscellaneous mine of iron content
With return mine.3. beneficial effect
Using technical solution provided by the invention, compared with prior art, have the advantages that：
(1) a kind of Ore Sintering Process of the invention shunts granulation emission reduction NOXMethod, select calcium ferrite generate quality hundred
Divide the Iron Ore Powder than being greater than 60%, above-mentioned Iron Ore Powder and fuel, flux is mixed to get the mixture containing fuel, then will
Mixture and remaining iron-bearing material and flux containing fuel carry out being mixed to get sinter mixture, are generated by selection calcium ferrite
The strong Iron Ore Powder of ability and fuel and flux mix, and can be more easier to generate more calcium ferrite in sintering, be conducive to CO and NO
Catalysis reaction, to reduce the emission reduction of nitrogen oxides in sintering flue gas；In addition, fuel is wrapped up by Iron Ore Powder and flux, fuel
The oxygen content of surrounding is lower, and the reaction that the N in fuel is converted to NOx is inhibited, to reduce NO in sintering flue gasXContain
Amount reduces sintering discharge；
(2) a kind of Ore Sintering Process of the invention shunts granulation emission reduction NOXMethod, from sintered mix method,
The condition of the generation of NOx is improved in the preparation process of sintering feed, cost is relatively low for emission reduction；And this sintered mix method sinter
Quality index have little effect, in addition, the yield rate and usage factor to sinter also make moderate progress, while to sinter
Metallurgical performance do not influence.
(3) a kind of Ore Sintering Process of the invention shunts granulation emission reduction NOXMethod, in selective divided-flow mixing S10
S11 point mixed for one two mixed, reinforce mixed effect, conducive to more calcium ferrite is generated, reinforce catalysis during the sintering process
Effect；
(4) a kind of Ore Sintering Process of the invention shunts granulation emission reduction NOXMethod, addition selection in mixture A
Grain is 3~5mm and its fine grinding is obtained 100 mesh or less returns mine, and since the ferrous acid calcium content of returning mine of this section granularity is more, and is passed through
Fine grinding processing is crossed, is beneficial to be sintered the characteristic containing calcium ferrite in self-produced return mine, promotes catalysis of the calcium ferrite to nitrogen oxides
Effect；
(5) a kind of Ore Sintering Process of the invention shunts granulation emission reduction NOXMethod, addition Ammonia adds in mixture A
Add agent, fuel and Ammonia additive to be wrapped up by iron ore and flux, inhibits it to decompose at 160~600 DEG C, prevent it from dividing too early
It solves and is pumped under negative pressure, a possibility that reacting with NO is reduced, so that it be made to decomposite at a high temperature of 950 degrees Celsius or more
NH3The NO released with fuel combustion during the sintering process reacts.
Detailed description of the invention
Fig. 1 is that a kind of Ore Sintering Process of the invention shunts granulation emission reduction NOXMethod 1 flow chart of embodiment.
Fig. 2 is that a kind of Ore Sintering Process of the invention shunts granulation emission reduction NOXMethod 2 flow chart of embodiment.
Fig. 3 is that a kind of Ore Sintering Process of the invention shunts granulation emission reduction NOXMethod 3 flow chart of embodiment.
Fig. 4 is that a kind of Ore Sintering Process of the invention shunts granulation emission reduction NOXMethod 4 flow chart of embodiment；
Fig. 5 is that a kind of Ore Sintering Process of the invention shunts granulation emission reduction NOXMethod flow chart.
Specific embodiment
Hereafter to the detailed description of exemplary embodiment of the present invention with reference to attached drawing, which forms one of description
Point, it has been shown as example enforceable exemplary embodiment of the invention in the figure.Although these exemplary embodiment quilts
Sufficiently describe in detail so that those skilled in the art can implement the present invention, it is to be understood that can realize other embodiments and
Can without departing from the spirit and scope of the present invention to the present invention various changes can be made.Hereafter to the embodiment of the present invention
More detailed description is not limited to required the scope of the present invention, and just to be illustrated and do not limit pair
The description of the features of the present invention and feature to propose to execute best mode of the invention, and is sufficient to make those skilled in the art
It can implement the present invention.Therefore, the scope of the invention is only defined by the appended claims.
Hereafter detailed description of the present invention and example embodiment are more fully understood in combination with attached drawing, wherein of the invention
Element and feature are identified by appended drawing reference.
Embodiment 1
As shown in Figure 1 and Figure 5, a kind of Ore Sintering Process of the invention shunts granulation emission reduction NOXMethod, by calcium ferrite
Iron Ore Powder of the generative capacity greater than 60% is mixed with fuel, flux, pelletizes to obtain the mixture containing fuel, remaining is contained
Iron material and flux are mixed, pelletize to obtain the mixture without fuel；Again by containing fuel mixture with without fuel
Mixture is mixed to get shunting granulation sinter mixture；By shunt granulation sinter mixture particle dress be laid on pallet surface into
Row ignition sintering shunts granulation sinter mixture during the sintering process and promotes NOXReduction, emission reduction.
Select calcium ferrite to generate the Iron Ore Powder that mass percent is greater than 60%, by above-mentioned Iron Ore Powder and fuel, flux into
Row is mixed to get the mixture containing fuel, then the mixture containing fuel is mixed to get with remaining iron-bearing material and flux
Sinter mixture.The strong Iron Ore Powder of selection calcium ferrite generative capacity is mixed with fuel, flux, is conducive to generate more ferrous acids
Calcium reinforces the catalytic effect of calcium ferrite.Specific step is as follows：
S10：Selective divided-flow mixing
S11：Calcium ferrite is selected to generate in Iron Ore Powder of the mass percent greater than 60% and fuel and flux addition blender
It is mixed, obtains mixture A；The sequencing that material is added into blender for the present embodiment is followed successively by fuel, flux and iron
Miberal powder is conducive to be easier to give birth in sintering it is found by the applicant that such feed way can be such that coke powder is wrapped up by flux and Iron Ore Powder
At calcium ferrite, the coke powder of inner layer can release NO in burningXAnd CO, it is wrapped in outer layer ferrous acid calcium treating and generates N2, to reach
To the effect of emission reduction；
S12：Remaining iron-bearing material and flux are added in blender and mixed, mixture B is obtained；
S20：Mixing granulation
The obtained mixture A and mixture B that pelletizes will be shunted to be added to and continue to be mixed to get sinter mixture in blender.
Wherein, it is worth noting that：The incorporation time of selective divided-flow mixing S10 is 2~4mm, and the present embodiment is preferred
The Granulation time of 3min, mixing granulation S20 are 5~7min, the preferred 6min of the present embodiment.The fuel granularity of selection is less than 3mm.It is mixed
The content for closing lime in flux in material A is M, and numerical value is calculated with following formula：
Wherein, Ai：The quality (kg) of i-th kind of mine；Xi：The calcium ferrite of i-th kind of Iron Ore Powder generates mass percent；Y：Reaction
It generates calcium silicates and accounts for SiO2Ratio；SiO2Quality (kg).The present embodiment, which is used, wraps up whole with 10% quick lime
Fuel, the basicity (CaO/SiO of the final sinter mixture matched2) it is 2.0.
The emission reduction efficiency of the nitrogen oxides of the present embodiment is 21.70%, and the drum strength of sinter is 66.13%, at
Product rate is 80.89%, usage factor 2.134t.m-2.h-1, compared with reference test, the yield and quality for not influencing sinter refers to
Mark, in addition, the yield rate and usage factor to sinter also make moderate progress, while not influencing the metallurgical performance of sinter.
Embodiment 2
As shown in Fig. 2, the basic content of the present embodiment is with embodiment 1, the difference is that：S11：Calcium ferrite is selected to generate
Iron Ore Powder of the mass percent greater than 60% and fuel and flux be added in blender carry out it is one mixed, one it is mixed after the completion of be then added to
Two are carried out in blender to mix, and obtain mixture A；S12：Progress one in blender is added in remaining iron-bearing material and flux to mix,
Obtain mixture B；The obtained mixture A of granulation and mixture B will be finally shunted to be added in blender three mixed to obtain sintering mixed
Close material.Wherein, it one does time as 2~3min, the present embodiment preferred 2min, two do time as 0~1min, and the present embodiment is preferred
1min, mixing granulation S20 time are 5~7min, the preferred 6min of the present embodiment.The present embodiment is compared with Example 1 in selectivity
Primary mixing is increased when shunting mixing S10, reinforces mixed effect, conducive to more calcium ferrite is generated, is reinforced in sintering process
In catalytic effect.
The emission reduction efficiency of the nitrogen oxides of the present embodiment is 22.89%, and the drum strength of sinter is 66.83%, at
Product rate is 81.36%, usage factor 2.148t.m-2.h-1, compared with reference test, the yield and quality for not influencing sinter refers to
Mark, in addition, the yield rate and usage factor to sinter also make moderate progress, while not influencing the metallurgical performance of sinter.
Embodiment 3
As shown in figure 3, the basic content of the present embodiment is with embodiment 1, the difference is that：S10：Selective divided-flow mixing
S11：Select calcium ferrite generate mass percent be greater than 60% Iron Ore Powder, by above-mentioned Iron Ore Powder, return mine, fuel and flux add
Enter in blender and mixed, obtains mixture A；Described returning mine selects particle returning mine for 3~5mm, by it is above-mentioned return mine into
Row fine grinding obtains 100 mesh hereinafter, the cold returns quality accounts for the 5~15% of fuel mass, the present embodiment preferably 10%.This implementation
Above-mentioned material is the blender addition sequence that is is added is successively fuel, is returned mine, flux and Iron Ore Powder.
The emission reduction efficiency of the nitrogen oxides of the present embodiment is 23.35%, and the drum strength of sinter is 65.94%, at
Product rate is 80.89%, usage factor 2.203t.m-2.h-1, compared with reference test, the yield and quality for not influencing sinter refers to
Mark, in addition, the yield rate and usage factor to sinter also make moderate progress, while not influencing the metallurgical performance of sinter.
The emission reduction principle of the present embodiment further includes：Select return mine particle for 3~5mm carry out fine grinding obtain 100 mesh hereinafter,
Granularity of returning mine is larger, and the ferrous acid calcium content contained is more, to the good catalytic activity of nitrogen oxides；In addition, it is abundant with fuel to return mine
Mixing, it is easier to the reaction of nitrogen oxides and carbon monoxide that catalytic fuel is released in combustion chamber.
Embodiment 4
As shown in figure 4, the basic content of the present embodiment is with embodiment 1, the difference is that：It further include ammonia in mixture A
Class additive, the present embodiment selects urea and its mass fraction is the 0.03% of fuel, and granularity is 1~2mm.
The emission reduction efficiency of the nitrogen oxides of the present embodiment is 23.27%, and the drum strength of sinter is 66.73%, at
Product rate is 81.38%, usage factor 2.143t.m-2.h-1。
The emission reduction principle of the present embodiment further includes：Fuel and urea are wrapped up by iron ore and flux, inhibit its 160~
Decomposed at 600 DEG C, prevent urea premature decomposition and be pumped under negative pressure, reduction a possibility that being reacted with NO, thus make its
The NH decomposited at a high temperature of 950 degrees Celsius or more3The NO released with fuel combustion during the sintering process reacts.
Embodiment 5
The basic content of the present embodiment with embodiment 1, the difference is that：The urea is aqueous solution, stirred
It is added in sinter mixture in journey.The emission reduction efficiency of the nitrogen oxides of the present embodiment is 23.52%, and the rotary drum of sinter is strong
Degree is 66.41%, yield rate 81.41%, usage factor 2.151t.m-2.h-1。
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
It is carry out various modifications in the case where from the scope of the present invention being defined by the following claims and modification.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
It falls into the scope of the present invention described herein.In addition, Development Status and meaning that background technique is intended in order to illustrate this technology,
It is not intended to limit the present invention or the application and application field of the invention.
More specifically, although exemplary embodiment of the present invention has been described herein, the invention is not limited to
These embodiments, but including those skilled in the art according to front detailed description it can be appreciated that it is modified, omit,
Any and whole embodiments of (such as between each embodiment) combination, adaptive change and/or replacement.In claim
It limits the language according to used in claim and is widely explained, and be not limited in foregoing detailed description or in reality
The example described during this application is applied, these examples should be considered as nonexcludability.For example, in the present invention, term is " preferably
Ground " be not it is exclusive, here it means that " preferably, but be not restricted to that ".It is in office where method or process claims
In any step for enumerating can execute in any order and be not limited to the sequence proposed in claim.Therefore, of the invention
Range should only be determined by appended claims and its legal equivalents, rather than by descriptions and examples given above Lai
It determines.
Claims (10)
1. a kind of Ore Sintering Process shunts granulation emission reduction NOXMethod, it is characterised in that：Calcium ferrite generative capacity is greater than
60% Iron Ore Powder is mixed with fuel, flux, pelletizes to obtain the mixture containing fuel, by remaining iron-bearing material and flux
It mixed, pelletize to obtain the mixture without fuel；The mixture containing fuel is mixed with the mixture without fuel again
To shunting granulation sinter mixture；Granulation sinter mixture particle dress will be shunted and be laid on pallet surface progress ignition sintering,
Granulation sinter mixture is shunted during the sintering process promotes NOXReduction, emission reduction.
2. a kind of Ore Sintering Process according to claim 1 shunts granulation emission reduction NOXMethod, it is characterised in that：
S10：Selective divided-flow granulation
S11：Prepare the mixture A containing fuel
Iron Ore Powder of the selection calcium ferrite generative capacity greater than 60%, fuel and flux, which are added in blender, to be mixed, and is prepared into
A is expected to mixing；Add water into mixing material A again, continues gyratory shaker and A, which pelletizes, to be expected to mixing, be prepared containing fuel
Mixture A；
S12：Preparation is free of the mixture B of fuel
Remaining iron-bearing material and flux are added in blender and mixed, obtains mixing material B；Add water into mixing material B again,
Continue gyratory shaker and pelletize to material B is mixed, the mixture B without fuel is prepared；
S20：Mixing granulation
The mixture A that is uniformly mixed so as to obtain and mixture B will be shunted and be added in blender that continue to be mixed to get shunting granulation sintering mixed
Close material.
3. a kind of Ore Sintering Process according to claim 1 shunts granulation emission reduction NOXMethod, it is characterised in that：
S10：Selective divided-flow granulation
S11：Prepare the mixture A containing fuel
Iron Ore Powder of the selection calcium ferrite generative capacity greater than 60%, fuel and flux, which are added in blender, to be mixed, and is prepared into
A is expected to mixing；Add water into mixing material A again, continues gyratory shaker and A, which pelletizes, to be expected to mixing, be prepared containing fuel
Mixture A；
S12：Preparation is free of the mixture B of fuel
Remaining iron-bearing material and flux are added in blender and mixed, obtains mixing material B；Add water into mixing material B again,
Continue gyratory shaker and pelletize to material B is mixed, the mixture B without fuel is prepared；
S20：Mixing granulation
S21：The mixture A being uniformly mixed so as to obtain and mixture B will be shunted and be added in blender and continue to be mixed to get shunting granulation burning
Tie mixture；
S22：Iron-bearing material, fuel and flux are added in blender and are mixed, and mixing material C is prepared；Again into mixing material C
Add water, continues gyratory shaker and pelletize to material C is mixed, common mixture is prepared；
S30：Ignition sintering
Mat formation the shop fixtures bed of material on the top of pallet, common mixture dress is secondly laid on shop fixtures bed of material top and forms common material
Layer；The top that shunting granulation sinter mixture dress is laid on the common bed of material is formed again and shunts the emission reduction bed of material of pelletizing, in sintering process
Middle shunting granulation sinter mixture promotes NOXReduction, emission reduction.
4. a kind of Ore Sintering Process according to claim 3 shunts granulation emission reduction NOXMethod, it is characterised in that：It will be general
The top that logical mixture dress is laid on the shunting granulation emission reduction bed of material forms the common bed of material.
5. a kind of Ore Sintering Process shunting granulation emission reduction NO according to Claims 2 or 3 or 4XMethod, feature exists
In：S11 the specific steps are：Iron Ore Powder of the calcium ferrite generative capacity greater than 60% is added in blender with flux and is mixed
Even, mixing continuously adds fuel into blender after completing and is mixed, and obtains mixing material A after mixing.
6. a kind of Ore Sintering Process shunting granulation emission reduction NO according to Claims 2 or 3 or 4XMethod, feature exists
In：S11 the specific steps are：Iron Ore Powder of the calcium ferrite generative capacity greater than 60%, flux and additive are added in blender
It is mixed, wherein includes returning mine in additive, mixing continuously adds fuel into blender after completing and mixed, after mixing
It obtains mixing material A.
7. a kind of Ore Sintering Process according to claim 1 or 2 or 3 or 4 shunts granulation emission reduction NOXMethod, feature
It is：The quality of lime is M in flux in mixture A, and numerical value is calculated with following formula：
Wherein, Ai：The quality (kg) of i-th kind of mine；Xi：The calcium ferrite of i-th kind of Iron Ore Powder generates mass percent；Y：Reaction generates
Calcium silicates accounts for SiO2Ratio；SiO2Quality (kg)；Wherein the value of α is：0.35~0.50；The value of β is 0.94
~1.10.
8. a kind of Ore Sintering Process according to claim 6 shunts granulation emission reduction NOXMethod, it is characterised in that：It is described
Return mine and return mine for fine grinding, -100 mesh percent of pass that fine grinding is returned mine are 80%.
9. a kind of Ore Sintering Process according to claim 6 shunts granulation emission reduction NOXMethod, it is characterised in that：It is described
Return mine and return mine for fine grinding, fine grinding is returned mine by selecting particle to carry out fine grinding and obtain fine grinding to return mine for returning mine for 3~5mm.
10. -4 or 8-9 is described in any item a kind of for emission reduction NO in sintering process according to claim 1XMethod for mixing, it is special
Sign is：Remaining iron-bearing material includes Iron Ore Powder of the calcium ferrite generative capacity less than or equal to 60%, the miscellaneous mine of iron content and returns mine.
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| CN110157899A (en) * | 2019-06-21 | 2019-08-23 | 中南大学 | A kind of method that sintering process strengthens harmful element removing and high efficiente callback |
| CN114350941A (en) * | 2022-01-13 | 2022-04-15 | 鞍钢股份有限公司 | Method for sintering iron ore by using Ti-Fe as nitrogen fixing agent |
| CN114574691A (en) * | 2022-03-30 | 2022-06-03 | 鞍钢股份有限公司 | Ultra-thick material layer sintering method capable of reducing pollutant emission |
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Application publication date: 20181116 |