CN106282542B - A kind of collaboration discharge-reducing method of sintering process multiple pollutant - Google Patents
A kind of collaboration discharge-reducing method of sintering process multiple pollutant Download PDFInfo
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Abstract
The invention discloses a kind of collaboration discharge-reducing method of sintering process multiple pollutant, mainly solves online SO in sintering process2The technical problem that the collaboration emission reduction of, bioxin is difficult to.The technical scheme is that：A kind of collaboration discharge-reducing method of sintering process multiple pollutant, it is made up of prepare sinter mixture stage control step, sintering feed stage control step and the down draft sintering stage control step carried out successively.The inventive method by by not with addition of iron-bearing auxiliary material and the additive containing Ammonia compound dress be layered on above the first mixing bed of material formed collaboration the emission reduction bed of material, realize online SO in sintering process2The collaboration emission reduction of, bioxin, and the normal production of sintering work is ensure that, realize the Collaborative Control of multiple pollutant in sintering process.
Description
Technical field
The present invention relates to pollution reduction technical field during iron ore sintering, and in particular to a kind of sintering process is a variety of
The collaboration discharge-reducing method of pollutant.
Background technology
Sintering is an important step on Consolidated Steel Corporation's production chain, and sintering process provides for blast furnace well enters stove
While ore deposit, huge environmental pollution is also brought.These pollutants mainly include SOx、NOx, the gaseous state such as HCl, HF, bioxin
Pollutant and the particulate matter of other organic pollutions and heavy metal.
The SO arranged outside sintering circuit2Account for SO in steel production2The 85% of total emission volumn.Most sintering of the prior art
Sulfur method, such as dry method, semidry method and wet method, belong to the end treatment to sintering flue gas, be the removing side of Single Pollution thing
Method, and secondary pollution is also easy to produce, although most of SO can be removed effectively2, but investment cost and operating cost are huge, it is difficult to it is real
The collaboration emission reduction of existing multiple pollutant.Therefore, it is imperative to reform existing pollution reduction method.
Compared to SO2, another pollutant bioxin endangers human health and natural environment bigger.The pollutant is certainly
It is difficult degraded in right environment, being capable of long-distance migration in the world.Its toxicity is 130 times of cyanide, the 900 of arsenic
Again, there is the title of " poison in century "；It not only has carcinogenic, teratogenesis, mutagenicity, but also has endocrine.Its
It is difficult to decompose once taken in by organism, and concentrates and amplify along food chain, human and animal is endangered huge.Study table
Bright, influence of the persistence organic pollutant to the mankind can continue several generations, human survival, procreation and sustainable development be formed great
Threaten.
Sintering circuit is to produce the more production unit of dioxin pollutant.The sintered compound being distributed on pallet
Material, as chassis slowly moves after ignition furnace is lighted, air passes through the bed of material, and solid fuel ignition therein produces
Heat energy by the compound molten sintering in burning zone, therefore, sintering possesses most of condition of de novo formation denovo reactions：
1) chlorine comes from organic chlorine component in reclaimed dust, clinker and iron ore；2) carbon source in carbon fiber, lignin, coke powder,
Vinyl etc.；3) graphite-structure with deformation and omission, butter, copper and iron metal ion, as catalyst；4) oxygen
The property changed atmosphere, temperature are 250-450 DEG C.Meanwhile during iron and steel enterprise produces sintering deposit, it will usually recycled enterprise
Solid waste in the industry, OG mud, blast furnace ash etc. is such as made steel, therefore sintering process has inevitably reclaimed part heavy metal,
And these heavy metals (such as Cu) exactly bioxin predecessor (such as polystream phenol and diphenyl ether) generation bioxin reaction in rise
To catalytic action；In addition, to reduce the low temperature reduction degradation index of sintering deposit, often CaCl is sprayed on finished product sintering deposit2It is dilute molten
Liquid, although improving Metallurgical Properties of Sinter, " chlorine source " also is provided for the generation of sintering process Zhong bioxin simultaneously, for its generation
Create material conditions.
In Europe, iron ore sintering is considered as the second largest toxic pollutant discharge for being only second to city garbage incinerator
Source.The content that the external especially developed country such as Japan, Europe discharges waste gas Zhong dioxins materials to sintering is strict
Standard limits and control measure.But Dui bioxin this kind of research for continuing organic pollution in China's just starts to walk, bis- Evil
Pollution surveys, monitoring, emission control, formation mechanism and Research on Ecological Effect of English etc. lag far behind the prosperity such as American-European-Japanese
Country.Therefore, carry out the mechanism of production research of Dui bioxin, and effective bioxin emission-reduction technology is formulated to steel and iron industry with this
Sustainable development, environmental protection it is significant.As China specially issues《On Jia Qiang bioxin prevention and cure of pollution
Instruction》And the appearance of environmental protection new-standard, even more push sintering process bioxin emission reduction to the teeth of the storm；Therefore develop
Go out to invest that operating cost is low, transformation process is few and without online bioxin emission reduction skill in the sintering process of secondary pollution
Art, to the emission reduction of Iron and Steel Enterprises in China waste, realize that sustainable development is significant.
Through patent retrieval, some related technical scheme discloses, such as：One kind sintering flue gas scrubbing CO_2 and
The device and method (CN201110173596.1) of bioxin, agglomerates of sintered pellets flue gas desulfurization and denitrification collaboration governing system and technique
(CN201410072049.8) a kind of, dust removal integrated equipment of sintering flue gas desulfurization Tuo bioxin for not setting electric precipitation
(CN201310713790.3) etc.；Although above-mentioned technical proposal can realize SO2The synchronous emission reduction of, bioxin, but above-mentioned technology
Scheme belongs to end treatment, is the absorption emission reduction of big exhaust gas volumn, low content, does not realize online in sintering process
Pollution reduction, and invest, operating cost it is huge, significantly increase the emission reduction burden of enterprise, and emission reduction product easily produces
Secondary pollution so that iron and steel enterprise hangs back to pollution reduction.
It in addition, there will be on SO online in sintering process2The related technical scheme of emission reduction discloses：For in sintering process
On-line desulphurization method (CN99111573.2), based on addition inhibitor desulfurizing method in iron ore sintering process
(CN201110022407.0), a kind of on-line desulphurization method (CN201410109130.9) of sintering process etc.；Above-mentioned technical side
Case realizes the on-line desulphurization in sintering process by adding Ammonia material in sinter bed.It is online on sintering process
Bioxin emission reductions, also have related technical scheme and disclose：The discharge-reducing method of iron ore sintering process bioxin
(CN201110180658.1), a kind of novel energy-saving emission-reducing sintering machine system and sintering method (CN201310167718.5) etc.,
Above-mentioned technical proposal by sinter bed add Ammonia material be used as bioxin generation additive realize in sintering process
In bioxin emission reductions.
Above-mentioned published technical scheme, propose the addition scheme of three kinds of Ammonia additives：(1) it is Ammonia additive is whole
Mixing is added in sinter bed, and (2) add Ammonia additive at a certain height of sinter bed, and (3) are by Ammonia additive
It is sprayed on sinter bed.Applicant has found three of the above technical scheme by in-depth study, following technology drawback be present：
(1) addition of Ammonia additive is extremely micro relative to the quality of sinter mixture, if Ammonia added
Add agent to be mixed to join in sinter mixture, necessarily cause the no specific aim of addition of Ammonia additive, on the one hand, if added
Ammonia additive amount it is less, then emission reduction effect can substantially reduce so that emission reduction is not thorough；On the other hand, if addition
Excessively, the quality of sintering deposit can be influenceed, and is also easy to produce secondary pollution, while increases emission reduction cost.
(2) addition of Ammonia additive is extremely micro relative to the quality of sinter mixture, if Ammonia added
Add agent to be added at a certain height of the sintered compound bed of material, easily produce fluctuation during due to cloth, cause to be difficult to urea granules
It is added to the height specified so that the desulfurized effect of urea is deteriorated, and complicated and changeable due to sintering process, sinter mixture
Moisture, fuel content, property of raw material all can produce large effect to sintering process, so that sintering process generation is larger
Fluctuation, if urea is added at the certain height of sinter bed, easily emission reduction effect is caused to produce fluctuation；In addition, sintering process
Bioxin is that serialization is continuously generated, if urea is simply added into a certain height in sinter bed, it is difficult to realize Er Evil
The emission reduction of English.
(3) in sintering process, if urea is dissolved in into water and adds full compound sintering deposit all technical can be caused to become
Difference, and declining with the increase of urea addition, directly affects the direct motion of the quality and blast furnace into stove ore, and due to
The coal addition position of urea does not have specific aim so that desulfurized effect is poor.
Applicant is set by long-time, a series of scientific research, creative proposition in sinter bed before this
The collaboration emission reduction bed of material is put, and Ammonia additive is added in the emission reduction bed of material is cooperateed with, so as to realize the SO in sintering process2, bis- Evil
English cooperates with emission reduction, and patent applied for：A kind of sintering process SO2, bioxin cooperates with discharge-reducing method and system (Chinese patent application
Number：201410592066.4)；The new side of Synchronization Control pollutant emission in a kind of sintering process based on layering dispensing and cloth
Method (Chinese Patent Application No.：2015101372519) etc.；But found in further research, further optimize batch mixing ginseng
After number, fuel addition condition, applicant has surprisingly found that the emission reduction effect of sintering process pollutant obtains further significantly carrying
It is high.
All it is single although existing technical scheme realizes the online emission reduction of pollutant sintering process to a certain extent
The specific emission reduction of one pollutant, it is impossible to realize SO2The collaboration emission reduction of He bioxin；And due to SO in sintering process2He bioxin
Production mechanism, formation zone, emission reduction condition differ widely, and the complexity of sintering process in addition, burn in sintering process
Each layer of knot all constantly changes so that existing technical scheme is difficult to the SO in sintering process2He bioxin
Cooperate with emission reduction.If realize the SO of sintering process2The collaboration emission reduction of, bioxin, be not the simple superposition of discharge-reducing method i.e.
The collaboration emission reduction of pollutant in sintering process can be achieved.Just because of the difficulty of collaboration emission reduction so that prior art is difficult to overcome
The online SO in sintering process2, bioxin cooperate with emission reduction technical bottleneck, and technical scheme realize it is sintered
The collaboration emission reduction of multiple pollutant in journey.
The content of the invention
It is an object of the invention to provide a kind of collaboration discharge-reducing method of sintering process multiple pollutant, mainly solve sintering
During online SO2The technical problem that the collaboration emission reduction of, bioxin is difficult to；Another object is that solve online in sintering process
Multiple pollutant efficient Collaborative Control and reduce pollution reduction cost technical problem.
Technical scheme is based on following research：
Due to SO in sintering process2Production mechanism, formation zone, emission reduction condition with bioxin differ widely so that existing
Some technical schemes are difficult to the SO in sintering process2The collaboration emission reduction of He bioxin；Wherein SO is limited in sintering process2With
Bioxin collaboration emission reduction principal element have it is following some：
(1) formation zone is different：SO in sintering process2Concentration discharge region in burning zone and drying layer, and SO2Concentration
Attached collection is in excessive moistening layer；However, bioxin mainly has two formation zone in sintering process, one is the cooling zone of sintering ore bed,
The second is the drying and preheating layer of sinter bed, particularly drying and preheating layer generation bioxin can not degrade；
(2) temperature conditionss of emission reduction are different：Using urea to SO2During emission reduction, urea and SO2Reaction temperature need be less than
100℃；However, the temperature range for suppressing bioxin generation is 200-800 DEG C；
(3) difference of emission reduction mechanism：Urea is being used to SO2During emission reduction, due to SO2Concentration is gathered in sinter bed more
In narrow and small one layer, it is only necessary to targetedly add urea to one layer of narrow and small progress and emission reduction can be achieved；However, suppressing
, it is necessary in drying and preheating band folding process when bioxin generates, flue-gas temperature is lasting by 200-800 DEG C of temperature range
Suppress the generation of bioxin.
Seriously hindered just because of factors above and SO is limited in sintering process2He bioxin cooperates with emission reduction, burns in addition
Complexity, the fluctuation of knot process, each layer sintered in sintering process all constantly change so that online in sintering process
SO2The emission reduction of He bioxin turns into a great technical bottleneck, it is necessary to find new Technology Ways.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：
A kind of collaboration discharge-reducing method of sintering process multiple pollutant, the control of sinter mixture stage is prepared by what is carried out successively
Step, sintering feed stage control step and down draft sintering stage control step processed are formed；
The described sinter mixture stage control step for preparing includes the step of following order is carried out：
S1, prepare sinter mixture, first by Iron Ore Powder, return mine, flux, iron-bearing auxiliary material and part of fuel add batch mixer in
Mix, then remaining fuel is added in compound, sinter mixture a is prepared after the completion of mixed pelletization；
S2, prepare the compound containing additive, first by Iron Ore Powder, return mine, flux and part of fuel add batch mixer in mix
It is even, Ammonia additive is added in compound during batch mixing, then again added remaining fuel in compound, is mixed
The compound b containing additive is prepared after the completion of granulation；
Described sintering feed stage control step includes the step of following order is carried out：
S3, the shop fixtures bed of material of mating formation above pallet；
S4, the sinter mixture a being prepared in S1 mated formation above the shop fixtures bed of material, form the first mixing bed of material；
S5, the compound b containing additive being prepared in S2 mats formation to be mixed above the bed of material first, is formed collaboration and is subtracted
Discharge layer；
S6, the sinter mixture a being prepared in S1 is mated formation on the collaboration emission reduction bed of material again, form the second compound
Layer；
Described down draft sintering stage control step includes the step of following order is carried out：
After the completion of S7, cloth, using coal gas ignition, it is 1100 DEG C~1200 DEG C to control firing temperature, and the duration of ignition is
2min~2.5min, carries out down draft sintering after the completion of igniting, suction pressure is 14.4kPa~14.6kPa.
Wherein, S1, which prepares sinter mixture, includes mixed once, by Iron Ore Powder, returns mine, flux, iron-bearing auxiliary material and 20-
30% fuel is added in batch mixer and mixed；Secondary mixing, the compound of upper step is added in batch mixer and pelletized, and it is backward
70-80% fuel is added in batch mixer, sinter mixture a is prepared after the completion of mixing granulation；
S2, which prepares the compound containing additive, includes mixed once, by Iron Ore Powder, return mine, flux and 5-15% fuel add
Enter in batch mixer and mix, add Ammonia additive in compound during batch mixing；Secondary mixing：By the compound of upper step
Add in batch mixer and pelletized, and 85-95% fuel is added in backward batch mixer, be prepared and contain after the completion of mixing granulation
The compound b of additive.
Preferably, the siccative mass percent of the compound b containing additive is：Iron Ore Powder：58.66%-
60.14%, return mine：26.61%-27.90%, flux：9.61%-9.85%, fuel：3.59%-3.63%.
Preferably, described sinter mixture a siccative mass percent is：Iron Ore Powder：54.23%-55.73%, return
Ore deposit：26.60%-27.90%, flux：8.03%-8.25%, fuel：3.54%-3.63%, iron-bearing auxiliary material：6.01%-
6.22%.
Preferably, the distance of described collaboration emission reduction bed of material distance from bottom pallet upper surface is sinter bed total height
1/10-1/8, collaboration the emission reduction bed of material thickness be sinter bed total height 1/8-1/5.
Preferably, the Ammonia additive in the compound containing additive of the described collaboration emission reduction bed of material is urea, wherein
The addition of urea is the 0.025%-0.04% of sinter bed gross mass.
Further, returning mine to sieve the screenings of sintering deposit described in the inventive method, is sintered by the fritter of intensity difference
Ore deposit and insufficient burnt and unsintered sintering feed composition.
Further, the mass percent of the flux component described in the inventive method is：Sky 43%~48%, lime stone
28%~33%, quick lime 22%~27%, the mass percent of each component is 100%.
Further, iron-bearing auxiliary material is made up of sintering dust, miscellaneous ore deposit and blast furnace ash in the inventive method；Wherein sintering dust is
Dedusting ash in sintering process, described miscellaneous ore deposit include slag, iron scale, bof sludge waste material；Blast furnace ash is blast furnace gas
One-time dedusting ash in dust removal process, i.e., the gravitational dust collection ash during dedusting of blast furnace gas.
Further, the fuel described in the inventive method is coke powder.
The present invention is by analysing in depth iron and steel enterprise's crude fuel characteristic, and the crude fuel characteristic based on iron and steel enterprise is creative
Proposition by changing the local bed of material dispensing of sinter bed, and realize that the pollutant of sintering process subtracts by layer-by-layer distribution
Row, iron and steel enterprise only need on the basis of existing raw material, by adjust cooperateed with sinter bed the emission reduction bed of material containing additive
Compound b dispensing, add the fuel of different content step by step during batch mixing so that fuel can be gathered in mixing just
Granulation surface afterwards, and in the compound b containing additive with addition of a small amount of Ammonia additive, then by the compound b containing additive
Mat formation and form the collaboration emission reduction bed of material on the first mixing bed of material, so as to form a wider collaboration emission reduction in sinter bed
Band, the generation on the one hand sintering flue gas by adding Ammonia additive and suppressing bioxin during cooling, the opposing party
Face cooperates with the dispensing of the compound b containing additive in the emission reduction bed of material by adjusting, and reduces the producing region again of bioxin
Cu, Cl plasma bioxin generation catalyst content so that sinter the temperature of flue gas and be reduced to two in the collaboration emission reduction bed of material
Below Evil English synthesis temperatures, and while bioxin generation is suppressed, the SO of excessive moistening layer is gathered in2Reacted with urea,
So that the collaboration emission reduction bed of material covers the generation layer of bioxin and the active position of desulfurization, and present application is subtracted by adjusting collaboration
The composition proportion of the compound b containing additive in discharge layer provides favourable bar for pollution reduction online in sintering process
Part, the proportioning of Ammonia additive is reduce further, on the basis of emission reduction cost is reduced, applicant has surprisingly found that emission reduction
Effect obtains further obvious raising, so as to which breakthrough realizes SO online in sintering process2The collaboration of, bioxin subtracts
Row, overcome the technical bottleneck that multiple pollutant in sintering process is difficult to cooperate with emission reduction.
The present invention has following good effect compared with prior art：
1st, the collaboration discharge-reducing method of a kind of sintering process multiple pollutant of the invention, by by not with addition of iron-bearing auxiliary material
And the compound dress of the additive containing Ammonia is layered on above the first mixing bed of material and forms the collaboration emission reduction bed of material, wherein Ammonia additive is
Urea, so as to form a wider collaboration emission reduction band in sinter bed so that close to sintering end point in sintering process
Continuously suppress the generation of bioxin in one region, until sintering flue-gas temperature is reduced to below bioxin synthesis temperature, and
While suppressing bioxin generation, the SO of excessive moistening layer is gathered in2Reacted with urea so that collaboration emission reduction band covers Er Evil
English produces layer and the active position of desulfurization；So as to which breakthrough realizes online SO in sintering process2The association of, bioxin
Same emission reduction, and the normal production of sintering work is ensure that, realize the Collaborative Control of multiple pollutant in sintering process.
2nd, the present invention is by adjusting each composition proportion in the compound containing additive, and points three layers enter during cloth
Row cloth, the existing crude fuel structure of enterprise can't be influenceed, and reduce the proportioning of Ammonia additive, and in batch mixing
During add the fuel of different content step by step so that fuel can be gathered in mixed granulation surface just, be advantageous to subtract
The generation of Shao bioxin, so as to reduce further emission reduction cost, the emission reduction burden of iron and steel enterprise is alleviated, is that iron and steel enterprise is real
The pollution reduction of existing high efficiency, low cost provides a full technical strategies.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of distribution device of the present invention；
Fig. 2 is the cloth schematic diagram of the present invention.
Description of symbols in figure：
The 1- shop fixtures bed of materials, the mixing bed of materials of 2- first, the 3- collaboration emission reduction bed of materials, the mixing bed of materials of 4- second, 5- pallets,
61- grate-layer material distribution devices, 62- the first mixture distributor devices, 63- emission reduction mixture distributor devices, 64- the second compound cloth
Expect device.
Embodiment
To further appreciate that present disclosure, with reference to embodiment, the invention will be further described.
Embodiment 1
Reference picture 1, Fig. 2, a kind of collaboration discharge-reducing method of sintering process multiple pollutant of the present embodiment, described sintering
Chassis 5 is disposed with grate-layer material distribution device 61, the first mixture distributor device 62, emission reduction mixture distributor device above
63rd, the second mixture distributor device 64, as shown in figure 1, wherein：Described grate-layer material distribution device 61 is used in pallet 5
Mat formation above the shop fixtures bed of material 1, the first described mixture distributor device 62, which is used to mating formation on the shop fixtures bed of material 1 in S1, to be prepared into
The sinter mixture a arrived, and the first mixing bed of material 2 is formed, the gross thickness of the described shop fixtures bed of material 1 and first mixing bed of material 2 is
80mm；Described emission reduction mixture distributor device 63 adds for containing for being prepared in the S2 that mats formation on the first mixing bed of material 2
Add the compound b of agent, and form the collaboration emission reduction bed of material 3, the height of the distance from bottom pallet 5 of the collaboration emission reduction bed of material 3 is
80mm, the thickness of the collaboration emission reduction bed of material 3 is 120mm；The second described mixture distributor device 64 is used in the collaboration emission reduction bed of material 3
Mat formation the sinter mixture a being prepared in S1 above, and forms the second mixing bed of material 4, and the described shop fixtures bed of material 1, first is mixed
Close the bed of material 2, the bed of material total height (bed of material gross thickness) of the mixing bed of material 4 of the collaboration emission reduction bed of material 3 and second is 700mm.
A kind of collaboration discharge-reducing method of sintering process multiple pollutant, the control of sinter mixture stage is prepared by what is carried out successively
Step, sintering feed stage control step and down draft sintering stage control step processed are formed；
The described sinter mixture stage control step for preparing includes the step of following order is carried out：
S1, prepare sinter mixture, first by Iron Ore Powder, return mine, flux, iron-bearing auxiliary material and 25% coke powder add batch mixer in
Mixed once is carried out, water is added into batch mixer during batch mixing, and controls mixed once to control compound water when completing
It is divided into 6.3%, the compound after mixed once is added into secondary mixing in batch mixer, first mixes 3.5min, and backward batch mixer
It is middle add 75% coke powder, remix 2.5min, and it is 6.8% to control mixture moisture after secondary mixing, is made after the completion of granulation
It is standby to obtain sinter mixture a；
S2, prepare the compound containing additive, first by Iron Ore Powder, return mine, flux and 10% coke powder add batch mixer in enter
Row mixed once, urea additive is added in compound during the batch mixing, water is added into batch mixer during batch mixing, and control
The moisture of compound is 6.2% when mixed once processed is completed, and the compound after mixed once is added into secondary mixing in batch mixer,
3.5min is first mixed, and 90% coke powder is added in backward batch mixer, remixes 1.8min, and control compound after secondary mixing
Moisture is 6.6%, and the compound b containing additive is obtained after the completion of mixed pelletization；
Described sintering feed stage control step includes the step of following order is carried out：
S3, grate-layer material of mating formation by grate-layer material distribution device 61 above pallet 5, form the shop fixtures bed of material 1, control
The thickness of the shop fixtures bed of material is 20mm；
S4, by the first mixture distributor device 62 the sinter mixture a being prepared in S1 is mated formation in the shop fixtures bed of material 1
Above, form the first mixing bed of material 2；
S5, by emission reduction mixture distributor device 63 the compound b containing additive being prepared in S2 is mated formation
Above the one mixing bed of material 2, the collaboration emission reduction bed of material 3 is formed, the height of the distance from bottom pallet 5 of the collaboration emission reduction bed of material 3 is
80mm, the thickness of the collaboration emission reduction bed of material 3 is 120mm；
S6, the sinter mixture a being prepared in S1 is mated formation again by the second mixture distributor device 64 subtracts in collaboration
Above discharge layer 3, the second mixing bed of material 4 is formed；
Described down draft sintering stage control step includes the step of following order is carried out：
After the completion of S7, cloth, using coal gas ignition, it is 1100 DEG C to control firing temperature, duration of ignition 2min, has been lighted a fire
Into rear carry out down draft sintering, suction pressure 14.4kPa.
Described sinter mixture a siccative mass percent is：Iron Ore Powder：55.73%, return mine：26.60%, flux：
8.03%, coke powder：3.63%, iron-bearing auxiliary material：6.01%；Described Iron Ore Powder is by card powder, Yang Di, SFHT, Kazakhstan powder and plum essence group
Into；The mass percent of described flux component is：Sky 45%, lime stone 30%, quick lime 25%；Described iron-bearing auxiliary material by
Sinter dust, miscellaneous ore deposit and blast furnace ash composition；The mass percent of described sinter mixture a siccative each component is：Card powder：
15.56%, Yang Di：14.30%, SFHT：3.15%, breathe out powder：13.04%, plum essence：9.68%, return mine：26.60%, sky：
3.84%, lime stone：0.96%, quick lime：3.23%, coke powder：3.63%, sinter dust：1.21%, miscellaneous ore deposit：3.19%, blast furnace
Ash：1.61%.
The described compound b containing additive siccative mass percent is：Iron Ore Powder：60.14%, return mine：
26.61%, flux：9.62%, coke powder：3.63%；Described Iron Ore Powder is made up of card powder, Yang Di, SFHT, Kazakhstan powder and plum essence；
The mass percent of described flux component is：Sky 45%, lime stone 30%, quick lime 25%；Described is mixed containing additive
Conjunction expects that the mass percent of b siccative each component is：Card powder：17.05%, Yang Di：15.67%, SFHT：3.45%, breathe out powder：
14.29%, plum essence：9.68%, return mine：26.61%, sky：4.40%, lime stone：2.80%, quick lime：2.42%, coke powder：
3.63%.
It is necessary explanation, described Iron Ore Powder is made up of card powder, Yang Di, SFHT, Kazakhstan powder and plum essence, wherein：It is described
Card powder for Brazil OK a karaoke club add this powder, the weight/mass percentage composition of its composition is：TFe：66.27%, FeO：1.02%, SiO2：
2.05%, Al2O3：1.41%, CaO：0.11%, MgO：0.12%, P：0.042%, S：0.0087%, remaining is inevitable
Impurity；Described Yang Di powder is the Iron Ore Powder for originating in Australia, and the weight/mass percentage composition of its composition is：TFe：58.84%,
FeO：1.01%, SiO2：4.64%, Al2O3：1.58%, CaO：0.091%, MgO：0.12%, P：0.049%, S：0.0054,
Remaining is inevitable impurity；Described SFHT is Brazilian bloodstone, and the weight/mass percentage composition of its composition is：TFe：59.74%,
FeO：0.92%, SiO2：11.06%, Al2O3：1.20%, CaO：0.089%, MgO：0.17%, P：0.050%, S：
0.0072%, remaining is inevitable impurity；Described Kazakhstan powder is Hammersley powder, and the weight/mass percentage composition of its composition is：
TFe：62.10%, FeO：0.69%, SiO2：3.45%, Al2O3：2.33%, CaO：0.080%, MgO：0.098%, P：
0.10%, S：0.022%, remaining is inevitable impurity；Described plum essence is plum mountain concentrate：The weight/mass percentage composition of its composition
For：TFe：56.10%, FeO：20.19%, SiO2：4.84%, Al2O3：0.953%, CaO：3.48%, MgO：1.21%, P：
0.12%, S：0.48%, remaining is inevitable impurity；Described returning mine is the screenings for sieving sintering deposit, by intensity difference
Fritter sintering deposit and insufficient burnt and unsintered sintering feed composition, the weight/mass percentage composition of its composition are：TFe：56.8%, FeO：
8.93%, SiO2：5.30%, Al2O3：1.80%, CaO：10.12%, MgO：1.77%, P：0.08%, S：0.015%, remaining
For inevitable impurity.
Flux of the present invention is made up of sky, lime stone and quick lime, wherein：The quality percentage of the composition of sky contains
Measure and be：SiO2：3.37%, Al2O3：0.68%, CaO：30.8%, MgO：19.60%, P：0.10%, S：0.016%, remaining is
Inevitable impurity；The weight/mass percentage composition of the composition of the lime stone is：SiO2：3.10%, Al2O3：0.64%, CaO：
53.10%, MgO：0.30%, P：0.01%, S：0.026%, remaining is inevitable impurity；The composition of described quick lime
Weight/mass percentage composition is：SiO2：3.76%, Al2O3：1.81%, CaO：82.00%, MgO：0.84%, P：0.01%, S：
0.33%, remaining is inevitable impurity.
Described iron-bearing auxiliary material is made up of sintering dust, miscellaneous ore deposit and blast furnace ash；It is removing in sintering process that it, which sinters dust,
Dirt ash, the weight/mass percentage composition of its composition are：TFe：49.48%, FeO：2.87%, SiO2：5.15%, Al2O3：1.96%,
CaO：11.69%, MgO：1.74%, P：0.062%, S：0.21%；Described miscellaneous ore deposit is by except sintering dust and blast furnace once
In steel manufacture process outside ash waste material composition, such as include slag, iron scale, bof sludge waste material form, its into
Point weight/mass percentage composition be：TFe：47.65%, FeO：34.30%, SiO2：4.22%, Al2O3：1.16%, CaO：
13.22%, MgO：2.47%, P：0.21%, S：0.20%, remaining is inevitable impurity；Blast furnace ash is commonly called as blast furnace gas again
Ash, is the gas dedusting ash of blast furnace, and the weight/mass percentage composition of its composition is：TFe：38.47%, C：28.13%, SiO2：
7.46%, CaO：2.74%, MgO：1.34%, P：0.06%, S：0.305%, remaining is inevitable impurity.
The addition of urea is the total matter of sinter bed in the compound b containing additive of the collaboration emission reduction bed of material 3 of embodiment 1
The 0.03% of amount, the gross mass of described sinter bed is that the shop fixtures bed of material 1, first mixes the bed of material 2, the and of the collaboration emission reduction bed of material 3
The gross mass of the bed of material of the second mixing bed of material 4.
After the stabilization of sintering, the SO of flue gas in sintering process is measured2Concentration He the concentration of bioxin, and calculate desulfurization degree and
The emission reduction efficiency record of bioxin is as shown in table 1.
Desulfurization degree=(the SO in benchmarks flue gas2SO after concentration-emission reduction in flue gas2Concentration)/benchmarks flue gas
In SO2Concentration × 100%.
Bioxin emission reduction efficiency=( bioxin is dense in flue gas after bioxin concentration-emission reduction in benchmarks flue gas
Degree) bioxin concentration × 100% in/benchmarks flue gas.
Comparative example 1
This comparative example is that the sintering process of this comparative example is with embodiment 1, and (bed of material is total for bed of material total height as benchmarks
Thickness) it is 700mm, wherein the addition of urea is the 0.03% of sinter bed gross mass, and difference is：
1. the thickness for cooperateing with the emission reduction bed of material 3 is zero, that is, it is not provided with cooperateing with the emission reduction bed of material 3, the only shop fixtures bed of material 1, first mixes
Close the bed of material 2 and second and mix the bed of material 4；
2. the sinter mixture by Iron Ore Powder, return mine, flux, fuel and iron-bearing auxiliary material form, i.e. the S1 with the present embodiment 1
In sinter mixture a composition it is identical；
3. fuel all adds in mixed once, mixture moisture is 6.5% after controlling mixed once, the thickness of grate-layer material
Spend for 35mm.
After sintering starts, the SO of flue gas after sintering stabilization is measured2The concentration of, bioxin, and such as table 1 is recorded, as the later stage
The benchmark of experiment.
Comparative example 2
The sintering process of this comparative example is 700mm with embodiment 1, bed of material total height (bed of material gross thickness), wherein urea
Addition is the 0.03% of sinter bed gross mass, and difference is：
1. the thickness for cooperateing with the emission reduction bed of material 3 is zero, that is, it is not provided with cooperateing with the emission reduction bed of material 3, but urea is first dissolved in water,
The aqueous solution of urea is mixed in sinter mixture；
2. the sinter mixture by Iron Ore Powder, return mine, flux, fuel and iron-bearing auxiliary material form, i.e. the S1 with the present embodiment 1
In sinter mixture a composition it is identical；
3. fuel all adds in mixed once, mixture moisture is 6.5% after controlling mixed once, the thickness of grate-layer material
Spend for 35mm.
After sintering starts, the SO of flue gas after sintering stabilization is measured2The concentration of, bioxin, and record such as table 1.
Comparative example 3
The sintering process of this comparative example is 700mm with embodiment 1, bed of material total height (bed of material gross thickness), wherein urea
Addition is the 0.03% of sinter bed gross mass, and difference is：
1. the thickness for cooperateing with the emission reduction bed of material 3 is zero, that is, it is not provided with cooperateing with the emission reduction bed of material 3, but urea granules dress is layered on
At certain height in sinter mixture, urea layer is formed, distance of the urea layer apart from pallet bottom is 120mm；
2. the sinter mixture by Iron Ore Powder, return mine, flux, fuel and iron-bearing auxiliary material form, i.e. the S1 with the present embodiment 1
In sinter mixture a composition it is identical；
3. fuel all adds in mixed once, and it is 6.5% to control mixture moisture after mixed once, grate-layer material
Thickness is 38mm.
After sintering starts, the SO of flue gas after sintering stabilization is measured2The concentration of, bioxin, and record such as table 1.
Comparative example 4
The sintering process of this comparative example is again provided with the mixing of the shop fixtures bed of material 1, first bed of material 2, collaboration subtracts with embodiment 1
Discharge layer 3 and second mixes the bed of material 4, and the addition form of the urea liquid of this comparative example, the thickness of the collaboration emission reduction bed of material 3 and reality
It is identical to apply example 1, bed of material total height (bed of material gross thickness) is 700mm, and wherein the addition of urea is sinter bed gross mass
0.03%, difference is：
1. include iron-bearing auxiliary material in the compound of the collaboration emission reduction bed of material 3, the compound by Iron Ore Powder, return mine, flux, combustion
Material and iron-bearing auxiliary material composition are that is, identical with the composition of the sinter mixture a in the S1 of the present embodiment 1.
2. fuel all adds in mixed once, and it is 6.5% to control mixture moisture after mixed once, grate-layer material
Thickness is 40mm.After sintering starts, the SO of flue gas after sintering stabilization is measured2The concentration of, bioxin, and record such as table 1.
Comparative example 5
The sintering process of this comparative example is again provided with the mixing of the shop fixtures bed of material 1, first bed of material 2, collaboration subtracts with embodiment 1
Discharge layer 3 and second mixes the bed of material 4, and the addition form of the urea liquid of this comparative example, the thickness of the collaboration emission reduction bed of material 3 and reality
It is identical to apply example 1, bed of material total height (bed of material gross thickness) is 700mm, and wherein the addition of urea is sinter bed gross mass
0.03%, difference is：
Fuel all adds in mixed once, and it is 6.5% to control mixture moisture after mixed once, the thickness of grate-layer material
Spend for 40mm；After sintering starts, the SO of flue gas after sintering stabilization is measured2The concentration of, bioxin, and record such as table 1.
Embodiment 2
Embodiment 2 is identical with the basic process of embodiment 1, and difference is：The thickness of the collaboration emission reduction bed of material 3 of embodiment 2
Spend for 88mm, detection SO2The generation concentration of, bioxin, the emission reduction efficiency record for calculating desulfurization degree, bioxin are as shown in table 1.
Embodiment 3
Embodiment 3 is identical with the basic process of embodiment 1, and difference is：The thickness of the collaboration emission reduction bed of material 3 of embodiment 3
Spend for 140mm, detection SO2The generation concentration of, bioxin, the emission reduction efficiency record for calculating desulfurization degree, bioxin are as shown in table 1.
Embodiment 4
Embodiment 4 is identical with the basic process of embodiment 1, and difference is：
A kind of collaboration discharge-reducing method of sintering process multiple pollutant, the control of sinter mixture stage is prepared by what is carried out successively
Step, sintering feed stage control step and down draft sintering stage control step processed are formed；
The described sinter mixture stage control step for preparing includes the step of following order is carried out：
S1, prepare sinter mixture, first by Iron Ore Powder, return mine, flux, iron-bearing auxiliary material and 20% coal dust add batch mixer in
Mixed once is carried out, water is added into batch mixer during batch mixing, and controls mixed once to control compound water when completing
It is divided into 6.25%, the compound after mixed once is added into secondary mixing in batch mixer, first mixes 3min, and in backward batch mixer
80% coal dust is added, remixes 2min, and it is 6.7% to control mixture moisture after secondary mixing, is prepared into after the completion of granulation
To sinter mixture a；
S2, prepare the compound containing additive, first by Iron Ore Powder, return mine, flux and 15% coal dust add batch mixer in enter
Row mixed once, urea additive is added in compound during the batch mixing, water is added into batch mixer during batch mixing, and control
The moisture of compound is 6.25% when mixed once processed is completed, and the compound after mixed once is added secondary mixed in batch mixer
Close, first mix 4min, and 85% coal dust is added in backward batch mixer, remix 2min, and control compound after secondary mixing
Moisture is 6.7%, and the compound b containing additive is obtained after the completion of mixed pelletization；
Described sintering feed stage control step includes the step of following order is carried out：
S3, grate-layer material of mating formation by grate-layer material distribution device 61 above pallet 5, form the shop fixtures bed of material 1, control
The thickness of the shop fixtures bed of material is 25mm；
S4, by the first mixture distributor device 62 the sinter mixture a being prepared in S1 is mated formation in the shop fixtures bed of material 1
Above, form the first mixing bed of material 2；
S5, by emission reduction mixture distributor device 63 the compound b containing additive being prepared in S2 is mated formation
Above the one mixing bed of material 2, the collaboration emission reduction bed of material 3 is formed, the height of the distance from bottom pallet 5 of the collaboration emission reduction bed of material 3 is
70mm, the thickness of the collaboration emission reduction bed of material 3 is 120mm；
S6, the sinter mixture a being prepared in S1 is mated formation again by the second mixture distributor device 64 subtracts in collaboration
Above discharge layer 3, the second mixing bed of material 4 is formed；
Described down draft sintering stage control step includes the step of following order is carried out：
After the completion of S7, cloth, using coal gas ignition, it is 1150 DEG C, duration of ignition 2.2min to control firing temperature, igniting
After the completion of carry out down draft sintering, suction pressure 14.6kPa.
The sinter mixture a of embodiment 4 siccative mass percent is：Iron Ore Powder：54.23%, return mine：27.90%, melt
Agent：8.25%, coal dust：3.54%, iron-bearing auxiliary material：6.08%；Described sinter mixture a Iron Ore Powder by card powder, Yang Di,
SFHT, powder and plum essence composition are breathed out, flux is by sky, lime stone and forms, and iron-bearing auxiliary material is by sintering dust, miscellaneous ore deposit and blast furnace ash group
Into；The mass percent of described sinter mixture a siccative each component is：Card powder：15.32%, Yang Di：13.59%,
SFHT：3.23%, breathe out powder：12.88%, plum essence：9.21%, return mine：27.90%, sky：3.88%, lime stone：0.99%, it is raw
Lime：3.38%, coal dust：3.54%, sinter dust：1.27%, miscellaneous ore deposit：2.98%, blast furnace ash：1.83%.Wherein collaboration subtracts
The compound b containing additive of discharge layer 3 siccative mass percent is：Iron Ore Powder：58.66%, return mine：27.90%, melt
Agent：9.85%, coal dust：3.59%；The described compound b containing additive Iron Ore Powder by card powder, Yang Di, SFHT, breathe out powder and
Plum essence composition, flux is by sky, lime stone and forms；The quality percentage of the described compound b containing additive siccative each component
Than for：Card powder：16.78%, Yang Di：15.00%, SFHT：3.54%, breathe out powder：14.13%, plum essence：9.21%, return mine：
27.90%, sky：4.03%, lime stone：2.94%, quick lime：2.88%, coal dust：3.59%.
The addition for wherein cooperateing with urea in the emission reduction bed of material 3 is the 0.025% of sinter bed gross mass, detects SO2, bis- Evil
The generation concentration of English, the emission reduction efficiency record for calculating desulfurization degree, bioxin are as shown in table 1.
Embodiment 5
Embodiment 5 is identical with the basic process of embodiment 1, and difference is：
A kind of collaboration discharge-reducing method of sintering process multiple pollutant, the control of sinter mixture stage is prepared by what is carried out successively
Step, sintering feed stage control step and down draft sintering stage control step processed are formed；
The described sinter mixture stage control step for preparing includes the step of following order is carried out：
S1, prepare sinter mixture, first by Iron Ore Powder, return mine, flux, iron-bearing auxiliary material and 30% fuel add batch mixer in
Mixed once is carried out, water is added into batch mixer during batch mixing, and controls mixed once to control compound water when completing
It is divided into 6.35%, the compound after mixed once is added into secondary mixing in batch mixer, first mixes 4min, and in backward batch mixer
70% fuel is added, remixes 3min, and it is 6.85% to control mixture moisture after secondary mixing, is prepared into after the completion of granulation
To sinter mixture a；
S2, prepare the compound containing additive, first by Iron Ore Powder, return mine, flux and 5% fuel add batch mixer in carry out
Mixed once, urea additive is added in compound during the batch mixing, water is added into batch mixer during batch mixing, and control
The moisture of compound is 6.15% when mixed once is completed, and the compound after mixed once is added into secondary mixing in batch mixer,
3min is first mixed, and 95% fuel is added in backward batch mixer, remixes 1.5min, and control compound water after secondary mixing
It is divided into 6.55%, the compound b containing additive is obtained after the completion of mixed pelletization；
Described sintering feed stage control step includes the step of following order is carried out：
S3, grate-layer material of mating formation by grate-layer material distribution device 61 above pallet 5, form the shop fixtures bed of material 1, control
The thickness of the shop fixtures bed of material is 23mm；
S4, by the first mixture distributor device 62 the sinter mixture a being prepared in S1 is mated formation in the shop fixtures bed of material 1
Above, form the first mixing bed of material 2；
S5, by emission reduction mixture distributor device 63 the compound b containing additive being prepared in S2 is mated formation
Above the one mixing bed of material 2, the collaboration emission reduction bed of material 3 is formed, the height of the distance from bottom pallet 5 of the collaboration emission reduction bed of material 3 is
88mm, the thickness of the collaboration emission reduction bed of material 3 is 120mm；
S6, the sinter mixture a being prepared in S1 is mated formation again by the second mixture distributor device 64 subtracts in collaboration
Above discharge layer 3, the second mixing bed of material 4 is formed；
Described down draft sintering stage control step includes the step of following order is carried out：
After the completion of S7, cloth, using coal gas ignition, it is 1200 DEG C, duration of ignition 2.5min to control firing temperature, igniting
After the completion of carry out down draft sintering, suction pressure 14.6kPa.
The sinter mixture a of embodiment 5 siccative mass percent is：Iron Ore Powder：55.27%, return mine：26.78%, melt
Agent：8.15%, fuel：3.58%, iron-bearing auxiliary material：6.22%；Described sinter mixture a Iron Ore Powder by card powder, Yang Di,
SFHT, powder and plum essence composition are breathed out, flux is by sky, lime stone and forms, and fuel is made up of coke powder and coal dust, and wherein fuel is by coke powder
1 is pressed with coal dust：1 mass ratio composition, iron-bearing auxiliary material are made up of sintering dust, miscellaneous ore deposit and blast furnace ash；Described sinter mixture a
The mass percent of siccative each component be：Card powder：15.51%, Yang Di：13.98%, SFHT：3.19%, breathe out powder：
13.02%, plum essence：9.57%, return mine：26.78%, sky：3.82%, lime stone：0.98%, quick lime：3.35%, coal dust：
1.79%, coke powder：1.79%, sinter dust：1.23%, miscellaneous ore deposit：3.17%, blast furnace ash：1.82%.Wherein cooperate with the emission reduction bed of material
The 3 compound b containing additive siccative mass percent is：Iron Ore Powder：59.64%, return mine：27.13%, flux：
9.61%, fuel：3.62%；The described compound b containing additive Iron Ore Powder is by card powder, Yang Di, SFHT, Kazakhstan powder and plum essence
Composition, flux is by sky, lime stone and forms, and fuel is made up of coke powder and coal dust, and wherein fuel presses 1 by coke powder and coal dust：1 matter
Amount is than composition；The mass percent of the described compound b containing additive siccative each component is：Card powder：17.01%, Yang Di：
15.50%, SFHT：3.52%, breathe out powder：14.20%, plum essence：9.41%, return mine：27.13%, sky：4.17%, lime stone：
2.88%, quick lime：2.56%, coal dust：1.81%, coke powder：1.81%.
The addition for wherein cooperateing with urea in the emission reduction bed of material 3 is the 0.04% of sinter bed gross mass, detects SO2, bis- Evil
The generation concentration of English, the emission reduction efficiency record for calculating desulfurization degree, bioxin are as shown in table 1.
SO in the flue gas of the sintering experiment of table 12, bioxin concentration and emission reduction efficiency
Contrasted by embodiment 1-5 in table 1 and comparative example 1-5 emission reduction data, it can be deduced that to draw a conclusion：
(1) contrast is carried out by embodiment 1-5 and comparative example 1 it can be found that by the way that the compound b equipped with additive is filled
It is layered on the first mixing bed of material 2 and forms the collaboration emission reduction bed of material 3 above, is set between the first mixing bed of material 2 and second mixes the bed of material 4
After having the collaboration emission reduction bed of material 3, compared to the benchmarks in comparative example 1, embodiment 1-5 has preferable desulfurized effect He bioxin
Emission reduction effect, desulfurization degree reach more than 85% , bioxin emission reduction efficiencies and reach more than 70%, have preferable emission reduction effect
Fruit, the standard (GB28662-2012) of National Pollutant emission reduction is reached；
(2) contrasted by embodiment 1 with comparative example 2 it can be found that being not provided with cooperateing with the emission reduction bed of material in comparative example 2
3, but urea is first dissolved in water, then the aqueous solution of urea is mixed in sinter mixture, and in order to further reduce emission reduction
The addition of urea is reduced to the 0.03% of sinter bed gross mass by cost, although now bioxin emission reduction effect is slightly good, subtracts
It is 75.47% to arrange efficiency, but the technical scheme has following deficiency：Because urea is mixed in sinter mixture so that de-
Sulphur does not have specific aim so that ammonia caused by urea decomposition can not be largely in time with being gathered in excessive moistening layer SO2React so that
Urea in overly moist is not enough to be used for desulfurization, so as to cause desulfurized effect to substantially reduce；Adding further, since urea is first dissolved in water
Enter in sinter mixture so that the aqueous solution consumes heat valuable in sintering process, so that the technical indicator of sintering is big
It is big to be deteriorated；
(3) contrasted by embodiment 1 and comparative example 3, be not provided with cooperateing with the emission reduction bed of material 3, but urea granules are filled
It is layered at the certain height in sinter mixture, forms urea layer, the distance of the urea layer apart from pallet bottom is
120mm, and in order to further reduce emission reduction cost, the addition of urea is reduced to the 0.03% of sinter bed gross mass,
Although the technical scheme has preferable desulfurized effect, the technical scheme has following deficiency：One, due to urea fill spread
In 120mm, only a thin layer is put in the dress bunk of urea so that urea is unable to bioxin, and producing region persistently suppresses two again
The generation of English is disliked, although after decomposing generation ammonia after urea layer, ammonia is also taken under urea layer (120mm) with negative pressure exhausting
Portion, but the emission reduction specific aim of the urea layer Dui bioxin of the technical scheme is not strong, so as to cause bioxin emission reduction efficiency significantly
Reduce；Secondly, due to cloth when easily produce fluctuation, making it difficult to urea granules are added to the height specified, cause desulfurization
Effect is deteriorated, and complicated and changeable due to sintering process, and moisture, fuel content, the property of raw material of sinter mixture all can be to burning
Knot process produces large effect, so that sintering process produces larger fluctuation, easily causes desulfurized effect to produce fluctuation；
(4) contrasted by embodiment 1 and comparative example 4, it is found that the addition of urea in the collaboration emission reduction bed of material 3 is identical
When, when cooperate be not incorporated iron-bearing auxiliary material in the emission reduction bed of material 3 when, reduce Cu, Cl plasma of the producing region again of bioxin
Bioxin generates the content of catalyst so that the temperature for sintering flue gas is reduced to bioxin synthesis temperature in the collaboration emission reduction bed of material 3
Hereinafter, compared to comparative example 4, embodiment 1 has more preferable desulfurized effect He bioxin emission reduction effect；
(5) contrasted, found when desulfurization degree is held essentially constant, but applicant shies by embodiment 1 and comparative example 5
The discovery being surprised first is added in mixed once part of fuel mixed by adjusting addition opportunity of fuel during sintered mix
Close in material, the emission reduction efficiency of , bioxin has further raising when then most fuel is added in secondary mixing,
This is due to add part of fuel in compound during secondary mixing, particularly after secondary mixing certain time,
Add fuel to again in secondary mixing, so that fuel is distributed in the granulation surface of the secondary mixing of compound, in addition, passing through
Moisture proportioning when adjusting batch mixing during batch mixing, so that full combustion of fuel, reduces sintering ore bed formation zone two
The carbon source of Evil English generation, and the thickness of the shop fixtures bed of material is reduced to 20-30mm, so that with good bioxin emission reduction
Effect.
In summary, collaboration emission reduction material is formed above by the way that the compound b dresses containing additive are layered on into the first mixing bed of material 2
Layer 3, after being provided with the collaboration emission reduction bed of material 3 between the first mixing bed of material 2 and second mixes the bed of material 4, formed in sinter bed
Targetedly special collaboration emission reduction band, and the creative material composition that have adjusted the collaboration emission reduction bed of material, reduce Er Evil
The content of Cu, Cl plasma of the producing region again of English, the formation condition of bioxin is reduced, so as to reduce the generation of bioxin
Amount；Moreover, present application is by adjusting addition opportunity of fuel during sintered mix, by most fuel in secondary mixing
Middle addition, particularly after secondary mixing certain time, then fuel added in secondary mixing, so that fuel is distributed in
The granulation surface of the secondary mixing of compound, so that full combustion of fuel, reduces carbon source caused by bioxin, so as to effectively subtract
The generation of Shao bioxin, and moisture proportioning during by adjusting batch mixing, and the thickness of grate-layer material, reduce further Er Evil
The yield of English so that the emission reduction efficiency of bioxin has further raising.Therefore, compared to comparative example 1-5, the present invention can be with
In the case of further urea addition, SO is realized2The high efficiency emission reduction of the collaboration of, bioxin.
The present invention is by analysing in depth iron and steel enterprise's crude fuel characteristic, and the crude fuel characteristic based on iron and steel enterprise is creative
Proposition realize the pollution reduction of sintering process by being layered dispensing and cloth, the compound b dresses containing additive are layered on
Between the first mixing bed of material 2 and second mixes the bed of material 4, the fuel of different content is added step by step during batch mixing so that
Fuel can be gathered in mixed granulation surface just, so that full combustion of fuel, reduces carbon source caused by bioxin, so as to
Efficiently reduce the generation of bioxin；And adjust and cooperateed with sinter bed with addition of a small amount of urea in the compound b containing additive
The compound b containing additive of the emission reduction bed of material 3 dispensing, it is one wider so as to be formed in sinter bed by layer-by-layer distribution
The section of emission reduction is cooperateed with, urea suppression sintering flue gas is on the one hand added and bioxin is generated during cooling, it is on the other hand logical
Layering dispensing and cloth are crossed, regulation cooperates with the dispensing of the compound b containing additive in the emission reduction bed of material 3, reduces bioxin
The content of Cu, Cl plasma bioxin generation catalyst of formation zone again, so as to further reduce sintering process Er Evil
The generation of English；And by adjusting the addition opportunity of fuel, adding parameter, most fuel is added in secondary mixing,
Particularly after secondary mixing certain time, then add fuel in secondary mixing, so that fuel is distributed in compound
The granulation surface of secondary mixing, so that full combustion of fuel, reduces carbon source caused by bioxin, so as to efficiently reduce Er Evil
The generation of English so that the emission reduction efficiency of bioxin has further raising.
In addition, technical scheme while bioxin generation is suppressed, is gathered in the SO of excessive moistening layer2Sent out with urea
Raw reaction so that the collaboration emission reduction bed of material 3 covers the generation layer of bioxin and the active position of desulfurization, reduce further urea
Proportioning, reduce emission reduction cost, sintering process SO realized so as to breakthrough2The collaboration emission reduction of, bioxin；The present invention's
Technical scheme only needs that least a portion of local dispensing in sinter bed is adjusted, and does not interfere with the existing crude fuel knot of enterprise
Structure, and a small amount of urea is added as emission reduction additive, you can the emission reduction of sintering process pollutant is realized, alleviates iron and steel enterprise
Emission reduction is born, and the pollution reduction for realizing high efficiency, low cost for iron and steel enterprise provides a kind of full technical strategies.
Claims (8)
1. a kind of collaboration discharge-reducing method of sintering process multiple pollutant, it is characterized in that, by the preparation sintered compound carried out successively
Expect that stage control step, sintering feed stage control step and down draft sintering stage control step are formed；
The described sinter mixture stage control step for preparing includes the step of following order is carried out：
S1, prepare sinter mixture, first by Iron Ore Powder, return mine, flux, iron-bearing auxiliary material and 20-30% fuel add batch mixer in
Carry out mixed once, after remaining 70-80% fuel is added in the compound through batch mixer mixed once, mixed pelletization is complete
Sinter mixture a is obtained after；
S2, prepare the compound containing additive, first by Iron Ore Powder, return mine, flux and 5-15% fuel add batch mixer in carry out
Mixed once, Ammonia additive is added in compound during the batch mixing, after by remaining 85-95% fuel be added to through
The compound b containing additive is obtained in the compound of batch mixer mixed once, after the completion of mixed pelletization；
Described sintering feed stage control step includes the step of following order is carried out：
S3, the shop fixtures bed of material of mating formation above pallet；
S4, the sinter mixture a being prepared in S1 mated formation above the shop fixtures bed of material, form the first mixing bed of material；
S5, the compound b containing additive being prepared in S2 mats formation to be mixed above the bed of material first, forms collaboration emission reduction material
Layer, the distance of described collaboration emission reduction bed of material distance from bottom pallet upper surface is the 1/10-1/8 of sinter bed total height,
The thickness for cooperateing with the emission reduction bed of material is the 1/8-1/5 of sinter bed total height；
S6, the sinter mixture a being prepared in S1 is mated formation on the collaboration emission reduction bed of material again, form the second mixing bed of material；
Described down draft sintering stage control step includes the step of following order is carried out：
After the completion of S7, cloth, using coal gas ignition, it is 1100 DEG C~1200 DEG C to control firing temperature, the duration of ignition be 2min~
2.5min carrying out down draft sintering after the completion of igniting, suction pressure is 14.4kPa~14.6kPa.
2. the collaboration discharge-reducing method of sintering process multiple pollutant as claimed in claim 1, it is characterized in that, it is described in S1
Sinter mixture a siccative mass percent is Iron Ore Powder 54.23%~55.73%, 26.60%~27.90%, flux of returning mine
8.03%~8.25%, fuel 3.54%~3.63%, iron-bearing auxiliary material 6.01%~6.22%, the mass percent of each component it
With for 100%.
3. the collaboration discharge-reducing method of sintering process multiple pollutant as claimed in claim 1, it is characterized in that, it is described in S2
The siccative mass percent of compound b containing additive is Iron Ore Powder 58.66%~60.14%, return mine 26.61%~
27.90%th, flux 9.61%~9.85%, fuel 3.59%~3.63%, the mass percent sum of each component is 100%.
4. the collaboration discharge-reducing method of sintering process multiple pollutant as claimed in claim 1, it is characterized in that, it is described in S5
It is urea to cooperate with the Ammonia additive in the compound b containing additive of the emission reduction bed of material, and wherein the addition of urea is sintering feed
The 0.025%~0.04% of layer gross mass.
5. the collaboration discharge-reducing method of sintering process multiple pollutant as claimed in claim 1, it is characterized in that, it is described return mine for
The screenings of sintering deposit is sieved, is made up of the fritter sintering deposit and insufficient burnt and unsintered sintering feed of intensity difference.
6. the collaboration discharge-reducing method of sintering process multiple pollutant as claimed in claim 1, it is characterized in that, described flux group
The mass percent divided is sky 43%~48%, lime stone 28%~33%, quick lime 22%~27%, the quality of each component
Percentage sum is 100%.
7. the collaboration discharge-reducing method of sintering process multiple pollutant as claimed in claim 1, it is characterized in that, described iron content is miscellaneous
Material is made up of sintering dust, miscellaneous ore deposit and blast furnace ash；Described sinters dust as the dedusting ash in sintering process, described miscellaneous ore deposit bag
Slag, iron scale, bof sludge waste material are included, described blast furnace ash is the one-time dedusting ash during dedusting of blast furnace gas.
8. the collaboration discharge-reducing method of sintering process multiple pollutant as claimed in claim 1, it is characterized in that, described fuel is
Coke powder.
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| CN107058724B (en) * | 2017-02-17 | 2018-08-10 | 钢研晟华工程技术有限公司 | A kind of reduction agglomeration for iron mine SO2The method for preparing raw material of discharge |
| CN107159678B (en) * | 2017-05-12 | 2019-07-19 | 中南大学 | The control of dioxins method of agglomeration for iron mine collaboration processing garbage flying ash process |
| CN108003960B (en) * | 2017-12-19 | 2020-07-28 | 华北理工大学 | Biomass fuel for iron ore sintering and preparation method and application thereof |
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| CN112226613B (en) * | 2020-09-17 | 2022-04-26 | 马鞍山钢铁股份有限公司 | Multi-pollutant collaborative emission reduction method in sintering process |
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| CN113215390B (en) * | 2020-12-24 | 2022-07-22 | 北京高能时代环境技术股份有限公司 | Copper-containing sludge sintering method |
| CN112725616B (en) * | 2020-12-29 | 2023-06-16 | 安徽工业大学 | Method for reducing emission of sintering flue gas pollutants by utilizing SCR (selective catalytic reduction) containing waste catalyst pellets |
| CN112813256A (en) * | 2020-12-29 | 2021-05-18 | 阳新鹏富矿业有限公司 | Copper-containing sludge sintering machine |
| CN113174482B (en) * | 2021-03-22 | 2022-10-04 | 中冶长天国际工程有限责任公司 | Process and device for cooperatively treating municipal sludge in iron ore sintering process |
| CN113430366A (en) * | 2021-06-03 | 2021-09-24 | 北京首钢股份有限公司 | Sintering material using urea as desulfurizer and sintering method |
| CN113444876A (en) * | 2021-06-29 | 2021-09-28 | 安徽工业大学 | Emission reduction SO in sintering and distributing process based on ammonia additives2Method (2) |
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