CN104694742B - Discharge-reducing method worked in coordination with in a kind of sintering process SO2, two English based on layering dispensing and cloth - Google Patents
Discharge-reducing method worked in coordination with in a kind of sintering process SO2, two English based on layering dispensing and cloth Download PDFInfo
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Abstract
The invention discloses a kind of sintering process SO based on layering dispensing and cloth2, two English work in coordination with discharge-reducing method, belong to sintering process pollution reduction technical field.The present invention concretely comprises the following steps: step one: sintered mix: preparing sinter mixture and being furnished with the compound of additive, wherein additive is urea granules；Step 2: sintering feed: at the above shop fixtures bed of material of mating formation of pallet；Sinter mixture is mated formation above formation the first mixing bed of material of the shop fixtures bed of material；Again the compound being furnished with additive is mated formation on the first mixing bed of material, form the collaborative reduction of discharging bed of material；Then sinter mixture is mated formation on the collaborative reduction of discharging bed of material, form the second mixing bed of material；Step 3: fume centralized collection process: intensified for the flue gas in the bellows of chassis postmedian pump is imported sack cleaner.The present invention is by layering dispensing and cloth, it is achieved that sintering process SO2, the collaborative reduction of discharging of two English, significantly reduce iron and steel enterprise reduction of discharging burden.
Description
Technical field
The present invention relates to pollution reduction technical field in sintering process, more particularly, it relates to a kind of sintering process SO based on layering dispensing and cloth2, two English work in coordination with discharge-reducing method.
Background technology
Sintering circuit is the important procedure that integrated iron and steel works produce chain, with the fast development of steel and iron industry, increasing to the required amount of iron ore.But, the rich ore directly entering stove ironmaking is fewer and feweri, it is necessary to exploits in a large number and uses lean ore resources.Lean ore directly enters stove smelting can make blast fumance index deteriorate.And the effect of sintering machine carries out agglomeration to Iron Ore Powder exactly.The metallurgical performance of sintered mineral is greatly improved, and brings huge economic benefit to blast fumance.And, sintering process is very strong to the adaptability of raw material, is possible not only to produce sintering deposit by Iron Ore Powder, can also process industrial ferrous contained miscellaneous material simultaneously.
But, sintering process provides for blast furnace while well entering stove ore deposit, also brings huge environmental pollution.Wherein, SO2It is one of important pollutant in sintering process, the SO of row outside sintering circuit2Account for SO during iron and steel produces2The 85% of total emission volumn.Sintering desulfuration method of the prior art, the mainly end treatment to sintering flue gas, it is broadly divided into dry method, semidry method and wet method, although major part can effectively remove SO2But, its investment cost and operating cost are huge, are easily generated secondary pollution, and are the removal methods of Single Pollution thing, it is difficult to realize the collaborative reduction of discharging of multiple pollutant.Therefore, existing pollution reduction method is reformed imperative.
In addition, remove SO2Outside, two English are another most important pollutants；Compare SO2, human health and natural environment are endangered bigger, are difficult to degraded in natural environment by two English, can long-distance migration in the world.Two English once discharge in atmosphere, are difficult to natural degradation and eliminate, and its toxicity is 130 times of cyanide, 900 times of arsenic, has the title of " poison in century "；It is difficult to decompose after being taken in by organism, and concentrates amplification along food chain, endangers human and animal huge, and it not only has carcinogenic, teratogenesis, mutagenicity, but also has endocrine.Research shows, the impact on the mankind for the persistence organic pollutant can continue several generations, constitutes significant threat to human survival, procreation and sustainable development.
Sintering circuit is to produce the more production unit of two English pollutants, and two English that sintering produces account for the 17.6% of total displacement.Sinter mixture is distributed on pallet, and as chassis slowly moves after lighting through ignition furnace, air passes through the bed of material, and the compound in burning zone is sintered or melted by the heat energy that burning produces.Sintering possesses most of condition of de novo formation de novo reaction: (1) chlorine comes from the organochlorine composition in reclaimed dust, slag and iron ore；(2) carbon source is in carbon fiber, lignin, coke powder, vinyl etc.；(3) with deformation and vacant graphite-structure, butter, copper and iron metal ion, as catalyst；(4) oxidizing atmosphere, temperature is 250 450 DEG C.
In addition, during iron and steel enterprise produces sintering deposit, owing to raw materials for sintering has recycled the solid waste in enterprise (such as steel-making OG mud, blast furnace ash etc.), therefore sintering process has inevitably reclaimed part heavy metal, such as heavy metal Cu, Pt, Zn, Hg etc., and these heavy metals (such as Cu) exactly generate at two English predecessors (such as polystream phenol and diphenyl ether) in the reaction of two English and play catalytic action, promote the generation of two English.And, for reducing the low temperature reduction degradation index of sintering deposit, on finished product sintering deposit, often spray CaCl2Weak solution, although reached to improve the purpose of Metallurgical Properties of Sinter, but also the generation for two English in sintering process provides " chlorine source ", creates material conditions for its generation simultaneously.In Europe, iron ore sintering is considered as the second largest toxic pollutant emission source being only second to city garbage incinerator.And, China on November 4th, 2010 has issued " instruction with regard to strengthening two English prevention and cure of pollution " specially, and " 12 " period two Yingcheng is attached most importance to control object.Therefore, promote two English emission-reduction technologies in sintering process imperative.
Through patent retrieval, some related technical scheme is open, as: a kind of device and method (CN201110173596.1) sintering flue gas scrubbing CO_2 and two English, agglomerates of sintered pellets flue gas desulfurization and denitrification works in coordination with governing system and technique (CN201410072049.8), and a kind of sintering flue gas desulfurization not setting electric precipitation takes off the two dust removal integrated equipment (CN201310713790.3) of English etc.；Although technique scheme can realize SO2, two English synchronization reduce discharging, but technique scheme belongs to end treatment, it is the absorption reduction of discharging of big exhaust gas volumn, low content, do not realize the online pollution reduction in sintering process, the investment, the operating cost that make pollution reduction are huge, pollution reduction is hung back by iron and steel enterprise, significantly increases the reduction of discharging burden of enterprise, and reduce discharging product and easily produce secondary pollution.
In addition, there will be with regard to SO online in sintering process2Reduce discharging related technical scheme open: for the on-line desulphurization method (CN99111573.2) in sintering process, based on the desulfurizing method in iron ore sintering process (CN201110022407.0) adding inhibitor, a kind of on-line desulphurization method (CN201410109130.9) etc. of sintering process；Technique scheme is by adding Ammonia material in sinter bed, it is achieved that the on-line desulphurization in sintering process.Reduce discharging with regard to two online English of sintering process, also the technical scheme being related to is open: the discharge-reducing method (CN201110180658.1) of iron ore sintering process two English, a kind of novel energy-saving emission-reducing sintering machine system and sintering method (CN201310167718.5) etc., technique scheme generates, as two English, the two English reductions of discharging that additive achieves in sintering process by adding Ammonia material in sinter bed.Above-mentioned published technical scheme, the addition scheme of three kinds of Ammonia additives is proposed, (1) it Ammonia additive is all mixed is added in sinter bed, (2) being added in Ammonia additive at a certain height of sinter bed, (3) are sprayed at Ammonia additive on sinter bed.
Anhui University of Technology is devoted to the research of sintering process pollution reduction work always, finds three of the above technical scheme by in-depth study, there is techniques below drawback:
(1) addition of Ammonia additive is extremely trace relative to the quality of sinter mixture, if be mixed to join Ammonia additive in sinter mixture, the addition necessarily making Ammonia additive does not has specific aim, on the one hand, if the amount of the Ammonia additive adding is less, the emission reduction effect being then substantially reduced, make to reduce discharging not thorough, on the other hand, if addition is too much, not only considerably increases the consumption of urea, increase reduction of discharging cost, and be easily generated secondary pollution, and the addition of urea can affect the quality of sintering deposit；
(2) addition of Ammonia additive is extremely trace relative to the quality of sinter mixture, if Ammonia additive is added at a certain height, owing to easily producing fluctuation during cloth, cause and be difficult to join urea granules the height specified, the desulfurized effect making urea is deteriorated, and complicated and changeable due to sintering process, the moisture of sinter mixture, fuel content, property of raw material all can produce large effect to sintering process, so that sintering process produces bigger fluctuation, if joining at the certain height of sinter bed Ammonia additive, emission reduction effect is easily made to produce fluctuation；Further, since flue gas is during cooling, two English may be had to generate, if additive is simply added into a certain height at sinter bed, when making flue gas by sintering this height, flue-gas temperature is still in the temperature range generating two English, it is difficult to realize the reduction of discharging of two English；
(3) in sintering process, add full compound that sintering deposit all technical can be caused to be deteriorated if urea is dissolved in water, and as the increase of urea addition declines, the quality impact on sintering deposit is bigger, directly affects the quality into stove ore, affect smooth operation of furnace.
Applicant is by scientific research long-time, a series of before this, and creative proposition arranges the collaborative bed of material that reduces discharging in sinter bed, and adds Ammonia additive in the collaborative reduction of discharging bed of material, thus realizes the SO in sintering process2, two English are collaborative reduces discharging, and patent applied for: a kind of sintering process SO2, two English work in coordination with discharge-reducing method and system (Chinese Patent Application No.: 201410592066.4)；But, the proportioning of urea needs further to be reduced, thus reduces further and reduce discharging cost.
Although existing technical scheme achieves the online reduction of discharging of pollutant sintering process to a certain extent, but is all the specific reduction of discharging of Single Pollution thing, it is impossible to realize SO2Collaborative reduction of discharging with two English；And due to SO in sintering process2Differ widely with the production mechanism of two English, formation zone, reduction of discharging condition, and the complexity of sintering process in addition, in sintering process, each layer of sintering all constantly changes so that existing technical scheme is difficult to the SO in sintering process2Collaborative reduction of discharging with two English.If the SO of sintering process to be realized2, the collaborative reduction of discharging of two English, be not the Synchronization Control that the simple superposition of discharge-reducing method can realize pollutant in sintering process, just because of the difficulty of collaborative reduction of discharging so that prior art is difficult to overcome SO online in sintering process2, two English work in coordination with the technical bottleneck of reduction of discharging, and the present invention achieves the collaborative reduction of discharging of multiple pollutant in sintering process by creative technical scheme.
In addition, existing online emission reduction schedule, only propose the discharge-reducing method of a sintering flue gas pollutant, but it is extremely tiny owing to reducing discharging product, if using deduster to carry out dedusting, during sintering exhausting will certainly be caused, producing crushing, causing air quantity in sintering process uneven, make SINTERING PRODUCTION unstable, and have a strong impact on SINTERING PRODUCTION.Existing technical scheme, the product producing after Ammonia additive is combined with pollutant is difficult to be collected, the product after reduction of discharging is caused to cannot get collecting, the online sintered product reducing discharging can not be processed, reduction of discharging is made to become " half " engineering, it is only alternatively discharged into pollutant in air, be not carried out the substantive reduction of discharging of pollutant.
Content of the invention
1. invention to solve the technical problem that
It is an object of the invention to overcome in prior art, sintering flue gas pollutant emission-reduction technology belongs to end treatment, and is difficult to realize the deficiency that multiple pollutant works in coordination with reduction of discharging in sintering process, provides a kind of sintering process SO based on layering dispensing and cloth2, two English work in coordination with discharge-reducing method, it is achieved in the collaborative reduction of discharging of the online multiple pollutant of sintering process, and reduce further reduction of discharging cost.
2. technical scheme
For reaching above-mentioned purpose, the technical scheme that the present invention provides is:
A kind of sintering process SO based on layering dispensing and cloth of the present invention2, two English work in coordination with discharge-reducing method, concrete reduction of discharging step is as follows:
Step one: sintered mix
(A) by Iron Ore Powder, return mine, flux, fuel and iron-bearing auxiliary material add batch mixer to carry out batch mixing, prepare sinter mixture (a) after mixing；
(B) by Iron Ore Powder, return mine, flux and fuel add batch mixer to carry out batch mixing, during batch mixing, solid Ammonia additive granules is added in compound, the average grain diameter of described Ammonia additive granules is 0.30-0.50mm, prepares the compound (b) being furnished with additive after mixing；
Step 2: sintering feed
(A) the above shop fixtures bed of material of mating formation at pallet；
(B) sinter mixture (a) preparing in step one (A) is mated formation on the shop fixtures bed of material, form the first mixing bed of material；
(C) compound (b) being furnished with additive preparing in step one (B) is mated formation on the first mixing bed of material, form the collaborative reduction of discharging bed of material；
(D) again the sinter mixture (a) preparing in step one (A) is mated formation on the collaborative reduction of discharging bed of material, form the second mixing bed of material；
Step 3: fume centralized collection process
Carry out down draft sintering after igniting, during sintering machine down draft sintering, intensified for flue gas in the bellows of pallet postmedian pump is imported sack cleaner, the boost pressure of described booster pump is 0.8-1.0KPa, wind speed in control sack cleaner is 0.75-0.85m/mim, and the sintering flue gas after sack cleaner dedusting is introduced Main Gas Flue of Sintering Machine by pipeline.
Further, the siccative mass percent of the described compound (b) being furnished with additive is: Iron Ore Powder: 58.66%-60.14%, returns mine: 26.61%-27.90%, flux: 9.61%-9.85%, fuel: 3.59%-3.63%.
Further, the siccative mass percent of described sinter mixture (a) is: Iron Ore Powder: 54.23%-55.73%, returns mine: 26.60%-27.90%, flux: 8.03%-8.25%, fuel: 3.54%-3.63%, iron-bearing auxiliary material: 6.01%-6.22%.
Further, the distance of described collaborative reduction of discharging bed of material distance from bottom pallet is the 1/10-1/8 of sinter bed total height, and the thickness of the collaborative reduction of discharging bed of material is the 1/8-1/5 of sinter bed total height.
Further, the solid Ammonia additive granules in the compound (b) being furnished with additive of the described collaborative reduction of discharging bed of material is urea granules, and wherein the addition of urea is the 0.02%-0.05% of sinter bed gross mass.
Further, the bellows of described postmedian are corresponding bellows below pallet length direction 1/2-3/4 position.
3. beneficial effect
Use the technical scheme that the present invention provides, compared with existing known technology, there is following remarkable result:
(1) a kind of sintering process SO based on layering dispensing and cloth of the present invention2, discharge-reducing method worked in coordination with in two English, by for a long time, the compound dress being furnished with additive without iron-bearing auxiliary material is layered on above the first mixing bed of material to be formed to work in coordination with and reduces discharging the bed of material by the creative proposition of deep scientific research, wherein additive is urea granules, the average grain diameter of urea granules is 0.30-0.50mm, thus in sinter bed, form a wider collaborative reduction of discharging band, make to sinter the generation that flue gas suppresses two English during cooling, until sintering flue-gas temperature is reduced to below two English synthesis temperatures, and while suppressing two English to generate, it is gathered in the SO of excessive moistening layer2React with urea so that the collaborative band that reduces discharging covers the generation layer of two English and the active position of desulfurization；Thus breakthrough achieve SO online in sintering process2, the collaborative reduction of discharging of two English, and ensure that the normal production of sintering work, overcome the technology drawback of Single Pollution thing end-o f-pipe-control in prior art, it is achieved that the collaborative reduction of discharging of multiple pollutant in sintering process；
(2) a kind of sintering process SO based on layering dispensing and cloth of the present invention2, two English work in coordination with discharge-reducing method, the each composition proportion being furnished with in the compound of additive by regulation, divide three layers during cloth and carry out cloth, enterprise's existing crude fuel structure can't be affected, and decrease the proportioning of urea granules, thus reduce further reduction of discharging cost, alleviate iron and steel enterprise reduction of discharging burden, for iron and steel enterprise realize high efficiency, the pollution reduction of low cost provides a full technical strategies；
(3) a kind of sintering process SO based on layering dispensing and cloth of the present invention2, two English work in coordination with discharge-reducing method, flue gas in the bellows of pallet postmedian is focused on by creative proposition, and intensified for the flue gas after bag-type dust pump is imported flue collector, it is ensured that the balance of air quantity in sintering process, thus ensure that the steady production of sintering process.
Brief description
Fig. 1 is sintering process SO of the present invention2, two English work in coordination with the overall structure schematic diagram of distribution device of discharge-reducing method；
Fig. 2 is sintering process SO of the present invention2, two English work in coordination with the cloth schematic diagram of discharge-reducing method；
Fig. 3 is the collaborative reduction of discharging asynchronous desulfurization degree of thickness of feed layer and the two English emission reduction efficiency tendency charts of the present invention.
Label declaration in schematic diagram:
1st, the shop fixtures bed of material；2nd, the first mixing bed of material；3rd, the reduction of discharging bed of material is worked in coordination with；4th, the second mixing bed of material；5th, pallet；61st, grate-layer material distribution device；62nd, the first mixture distributor device；63rd, mixture distributor device is reduced discharging；64th, the second mixture distributor device；7th, flue is focused on；8th, flue collector；9th, sack cleaner.
Detailed description of the invention
For further appreciating that present disclosure, below in conjunction with embodiment, the invention will be further described.
Embodiment 1
In conjunction with Fig. 1, Fig. 2 and Fig. 3, a kind of sintering process SO based on layering dispensing and cloth of the present embodiment2, discharge-reducing method worked in coordination with in two English, it is disposed with grate-layer material distribution device 61 above described pallet 5, first mixture distributor device 62, reduce discharging mixture distributor device 63, second mixture distributor device 64 (as shown in Figure 1), wherein: described grate-layer material distribution device 61 is for mating formation the shop fixtures bed of material 1 on pallet 5, the first described mixture distributor device 62 is for the sinter mixture (a) preparing in step one (A) of mating formation on the shop fixtures bed of material 1, and form the first mixing bed of material 2, the gross thickness of the described shop fixtures bed of material 1 and the first mixing bed of material 2 is 90mm；Described reduction of discharging mixture distributor device 63 is for the compound (b) being furnished with additive preparing in step one (B) of mating formation on the first mixing bed of material 2, and form the collaborative reduction of discharging bed of material 3, this collaborative height reducing discharging the bed of material 3 distance from bottom pallet 5 is 90mm, and the collaborative thickness reducing discharging the bed of material 3 is 100mm；The second described mixture distributor device 64 is for the sinter mixture (a) preparing in step one (A) of mating formation on the collaborative reduction of discharging bed of material 3, and forming the second mixing bed of material 4, the bed of material total height (bed of material gross thickness) of the described shop fixtures bed of material the 1st, the first mixing bed of material the 2nd, the collaborative reduction of discharging bed of material 3 and the second mixing bed of material 4 is 800mm.The area of the pallet 5 of the present embodiment is 180m2, there are 14 bellows, and open numbering at sintering device handpiece below pallet 5, numbered 1#To 14#。
The bottom of the pallet 5 of the present embodiment is provided with bellows, wherein the bellows of pallet 5 postmedian are connected with focusing on flue 7, the bellows of this postmedian are corresponding bellows below pallet 5 length direction 1/2-3/4 position, are 7 below the pallet 5 of the present embodiment#To 11#Bellows.
The flue 7 that focuses on of the present embodiment is connected with the entrance point of sack cleaner 9 through increasing pump, and the filter bag specification of this sack cleaner 9 is Φ 160 × 6000mm, and sack cleaner 9 is provided with 800 filter bags, total filter area 2413m of this sack cleaner 92, filter bag material is the laminating filtrate of PTFE, can realize trapping reducing discharging the ammonium sulfate generating, and reduction of discharging product is carried out resource application, meet the theory turning waste into wealth during using bag-type dust.The port of export of described sack cleaner 9 is connected with flue collector 8, and intensified for the flue gas after bag-type dust pump is imported flue collector 8, it is ensured that the balance of air quantity in sintering process, thus ensure that the steady production of sintering process；Described remaining bellows of pallet 5 are directly connected with flue collector 8, are the 1 of the present embodiment#To 6#Bellows and 12#To 14#Bellows are directly connected with flue collector 8.
Applicant of the present invention, in order to realize the collaborative reduction of discharging of multiple pollutions in sintering process, has passed through long a series of exploration；But, due to SO in sintering process2Differ widely with the production mechanism of two English, formation zone, reduction of discharging condition so that existing technical scheme is difficult to the SO in sintering process2Collaborative reduction of discharging with two English；Sintering process wherein limits SO2With two English work in coordination with the principal element of reduction of discharging have following some:
(1) formation zone is different: SO in sintering process2Concentration discharge region at burning zone and drying layer, and SO2Concentration attached collection at excessive moistening layer；But, in sintering process, two English mainly have two formation zone, the cooling zone of first sintering ore bed, and it two is the drying and preheating layer of sinter bed, and two English that particularly drying and preheating layer generates can not be degraded；
(2) temperature conditions reducing discharging is different: use urea to SO2During reduction of discharging, urea and SO2Reaction temperature need less than 100 DEG C；But, the temperature range suppressing two English to generate is 200-800 DEG C；
(3) difference of mechanism is reduced discharging: using urea to SO2During reduction of discharging, due to SO2Concentrate and be gathered in more narrow and small one layer of sinter bed, it is only necessary to add to this narrow and small layer urea can realize reducing discharging targetedly；But, when suppressing two English to generate, need in flue-gas temperature through the generation of lasting suppression two English of the temperature range of 200-800 DEG C.
Seriously hinder restriction SO in sintering process just because of factors above2Collaborative with two English reducing discharging, in addition the complexity of sintering process, fluctuation, in sintering process, each layer of sintering all constantly changes so that SO online in sintering process2Reducing discharging with two English becomes a great technical bottleneck.
Applicant is through exploration unremitting for a long time, have been achieved for a series of sintering process pollution reduction technical scheme with prominent emission reduction effect, and apply for: based on the desulfurizing method in iron ore sintering process (CN201110022407.0) adding inhibitor, a kind of on-line desulphurization method (CN201410109130.9) of sintering process, a kind of sintering process SO2, two English work in coordination with a series of patent of invention such as discharge-reducing method and system (CN201410592066.4).
nullBut，During further scientific research，Applicant is by analysing in depth iron and steel enterprise's crude fuel characteristic，And the local bed of material dispensing proposing by changing sinter bed of the crude fuel characteristic creativeness based on iron and steel enterprise，And the pollution reduction of sintering process is realized by layer-by-layer distribution，Iron and steel enterprise only need to be on the basis of existing raw material，Dispensing by the collaborative compound (b) being furnished with additive reducing discharging the bed of material 3 in regulation sinter bed，And it is furnished with the compound (b) of additive with addition of a small amount of solid Ammonia additive granules，Again the compound (b) being furnished with additive is mated formation on the first mixing bed of material 2, form the collaborative reduction of discharging bed of material 3，Thus in sinter bed, form a wider collaborative reduction of discharging band，On the one hand sinter, by adding Ammonia additive to make, the generation that flue gas suppresses two English during cooling，On the other hand the dispensing by the collaborative compound (b) being furnished with additive reducing discharging in the bed of material 3 of regulation，Decrease the Cu again producing region of two English、Cl plasma two English generates the content of catalyst，The temperature sintering flue gas is made to be reduced to below two English synthesis temperatures at the collaborative reduction of discharging bed of material 3，And while suppressing two English to generate，It is gathered in the SO of excessive moistening layer2React with urea, the collaborative bed of material 3 that reduces discharging is made to cover the generation layer of two English and the active position of desulfurization, and subject application provides advantage by the pollution reduction that the composition proportion of the collaborative compound (b) being furnished with additive reducing discharging in the bed of material 3 of regulation is online in sintering process, reduce further the proportioning of urea granules, on the basis of reducing reduction of discharging cost, applicant has surprisingly found that emission reduction effect is further improved, thus breakthrough achieves SO online in sintering process2, the collaborative reduction of discharging of two English, overcome multiple pollutant in sintering process be difficult to coordinate reduce discharging technical bottleneck.
A kind of sintering process SO based on layering dispensing and cloth of the present invention2, two English work in coordination with discharge-reducing method, it is embodied as step and is:
Step one: sintered mix
(A) by Iron Ore Powder, return mine, flux, fuel and iron-bearing auxiliary material add batch mixer to carry out batch mixing, prepare sinter mixture (a) after mixing；
(B) by Iron Ore Powder, return mine, flux and fuel add batch mixer to carry out batch mixing, during batch mixing, solid Ammonia additive granules is added in compound, the average grain diameter of described Ammonia additive granules is 0.30-0.50mm, prepares the compound (b) being furnished with additive after mixing；
Step 2: sintering feed
(A) utilize grate-layer material distribution device 61 in the above grate-layer material of mating formation of pallet 5, form the shop fixtures bed of material 1；
(B) the first mixture distributor device 62 is utilized to mat formation on the shop fixtures bed of material 1 by the sinter mixture (a) preparing in step one (A), forming the first mixing bed of material 2, the gross thickness of this shop fixtures bed of material 1 and the first mixing bed of material 2 is 90mm；
(C) reduction of discharging mixture distributor device 63 is utilized to mat formation the compound (b) being furnished with additive preparing in step one (B) on the first mixing bed of material 2, form the collaborative reduction of discharging bed of material 3, this collaborative height reducing discharging the bed of material 3 distance from bottom pallet 5 is 90mm, and the collaborative thickness reducing discharging the bed of material 3 is 100mm；
(D) utilize the second mixture distributor device 64 to mat formation the sinter mixture (a) preparing in step one (A) on the collaborative reduction of discharging bed of material 3, form the second mixing bed of material 4；
Step 3: fume centralized collection process
Carry out down draft sintering after igniting, during sintering machine down draft sintering, flue gas in the bellows of pallet 5 postmedian is imported and focuses on flue 7, focus on the intensified pump of the flue gas in flue 7 and import sack cleaner 9, the boost pressure of described booster pump is 0.9KPa, wind speed in control sack cleaner 9 is 0.80m/mim, and the sintering flue gas after sack cleaner 9 dedusting is introduced Main Gas Flue of Sintering Machine 8 by pipeline.
The siccative mass percent of described sinter mixture (a) is: Iron Ore Powder: 55.73%, returns mine: 26.60%, flux: 8.03%, fuel: 3.63%, iron-bearing auxiliary material: 6.01%；Described Iron Ore Powder is made up of card powder, Yang Di, SFHT, Kazakhstan powder and plum essence；Described flux is by sky, lime stone and forms；Described fuel is coke powder, and described iron-bearing auxiliary material is formed by sintering dust, miscellaneous ore deposit and blast furnace ash；The mass percent of each component of siccative of described sinter mixture (a) is: card powder: 15.56%, Yang Di: 14.30%, SFHT:3.15%, Kazakhstan powder: 13.04%, plum essence: 9.68%, returns mine: 26.60%, sky: 3.84%, lime stone: 0.96%, quick lime: 3.23%, coke powder: 3.63%, sintering dust: 1.21%, miscellaneous ore deposit: 3.19%, blast furnace ash: 1.61%.The siccative mass percent of the described compound (b) being furnished with additive is: Iron Ore Powder: 60.14%, returns mine: 26.61%, flux: 9.62%, fuel: 3.63%；Described Iron Ore Powder is made up of card powder, Yang Di, SFHT, Kazakhstan powder and plum essence；Described flux is by sky, lime stone and forms；Described fuel is coke powder；The mass percent of each component of siccative of the described compound (b) being furnished with additive is: card powder: 17.05%, Yang Di: 15.67%, SFHT:3.45%, Kazakhstan 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: described card powder adds this powder for the OK a karaoke club of Brazil, and 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 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 Brazil's 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 is: 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；The described screenings being to sieve sintering deposit of returning mine, is made up of the fritter sintering deposit and insufficient burnt and unsintered sintering feed of intensity difference, and the weight/mass percentage composition of its composition is: TFe:56.80%, FeO:8.93%, SiO2: 5.30%, Al2O3: 1.80%, CaO:10.12%, MgO:1.77%, P:0.08%, S:0.015%, remaining is inevitable impurity.
Flux of the present invention is made up of sky, lime stone and quick lime, wherein: the weight/mass percentage composition of the composition of sky is: 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 this 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 weight/mass percentage composition of the composition of described quick lime 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 formed by sintering dust, miscellaneous ore deposit and blast furnace ash；Its sintering dust is the dedusting ash in sintering process, and the weight/mass percentage composition of its composition is: 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 made up of the waste material in the steel manufacture process in addition to sintering dust and blast furnace ash, and as included the waste material compositions such as slag, iron scale, bof sludge, the weight/mass percentage composition of its composition is: 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 again blast furnace dust, the gas dust removal system of blast furnace is made up of gravitational dust collection and fine dedusting two sections, gas ash of the present invention is in the fine deduster of second segment, the dry type grain dust that dry dust removal obtains, 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.
Solid Ammonia additive granules in the compound (b) being furnished with additive of the collaborative reduction of discharging bed of material 3 of the present embodiment is urea granules, the average grain diameter of this urea granules is 0.30-0.50mm, wherein the addition of urea is the 0.035% of sinter bed gross mass, and the gross mass of described sinter bed is the gross mass of the shop fixtures bed of material the 1st, the first mixing bed of material the 2nd, the bed of material of the collaborative reduction of discharging bed of material 3 and the second mixing bed of material 4.
Sintering stable after, measure the SO of flue gas in sintering process at flue collector 82Concentration and the concentration of two English, and calculate desulfurization degree and the emission reduction efficiency of two English.
Desulfurization degree=(SO in benchmarks flue gas2SO in flue gas after concentration-reduction of discharging2Concentration) SO in/benchmarks flue gas2Concentration × 100%.
Two English concentration × 100% in two English emission reduction efficiency=(two English concentration in flue gas after the two English concentration-reduction of discharging in benchmarks flue gas)/benchmarks flue gas.
Comparative example 1
This comparative example is as benchmarks, the sintering process of this comparative example is with embodiment 1, difference is: the collaborative thickness reducing discharging the bed of material 3 is zero, it is i.e. not provided with the collaborative reduction of discharging bed of material 3, only have the shop fixtures bed of material the 1st, the first mixing bed of material 2 and the second mixing bed of material 4, and the bed of material total height (bed of material gross thickness) of the shop fixtures bed of material the 1st, the first mixing bed of material 2 and the second mixing bed of material 4 is 800mm.After sintering starts, measure the SO measuring flue gas after sintering is stablized2, the concentration of two English, and record such as table 1, as the benchmark of later experiments.
Comparative example 2
The sintering process of this comparative example is with embodiment 1, and the addition form of the urea granules of this comparative example, addition, the thickness of the collaborative reduction of discharging bed of material 3 is same as in Example 1, and the shop fixtures bed of material 1, the first mixing bed of material 2, the bed of material total height (bed of material gross thickness) of the collaborative reduction of discharging bed of material 3 and the second mixing bed of material 4 is 800mm, its difference is: include iron-bearing auxiliary material in the compound of the collaborative reduction of discharging bed of material 3 of this comparative example, this compound is by Iron Ore Powder, return mine, flux, fuel and iron-bearing auxiliary material composition, i.e. identical with the composition of the sinter mixture (a) in the present embodiment 1 step one (A).After sintering is stable, measure the SO of flue gas in sintering process2, the concentration of two English, and record such as table 1.
SO in the flue gas of table 1 sintering experiment2, two English concentration and emission reduction efficiency
By the contrast of the emission reduction efficiency of table 1 it can be concluded that
(1) pass through the experiment of embodiment 1 and comparative example 1 it appeared that, it is layered on the first mixing bed of material 2 bed of material 3 of the collaborative reduction of discharging of formation above by filling the compound (b) being furnished with additive, after being provided with the collaborative reduction of discharging bed of material 3 between the first mixing bed of material 2 and the second mixing bed of material 4, compare the benchmarks in comparative example 1, SO in flue gas in embodiment 12Concentration (mg/Nm3) by 694.2mg/Nm3It is reduced to 105.8mg/Nm3, emission reduction efficiency reaches 84.76%, two English concentration (pg-TEQ/Nm in flue gas3) by 763pg-TEQ/Nm3It is reduced to 207pg-TEQ/Nm3, emission reduction efficiency reaches 72.84%, has reached the standard (GB28662-2012) that National Pollutant reduces discharging.
(2) when embodiment 1 and comparative example 2 being contrasted, applicant has surprisingly found that the collaborative addition reducing discharging urea granules in the bed of material 3, when addition system is identical, when the collaborative reduction of discharging bed of material 3 does not allocates iron-bearing auxiliary material into, the desulfurization degree of sintering process reaches 84.76%, two English emission reduction efficiency are: 72.84%, compare comparative example 2 77.21% desulfurization degree and 61.88% two English emission reduction efficiency, there is more prominent emission reduction effect, the emission reduction efficiency of particularly two English is greatly improved, and the consumption of urea additive is greatly reduced, reduce further the reduction of discharging cost of iron and steel enterprise.
The present invention is by regulating layering dispensing and the cloth of sinter bed, the compound (b) being furnished with additive is filled and is layered between the first mixing bed of material 2 and the second mixing bed of material 4, not only further increase the emission reduction efficiency of pollutant, and reduce the addition of urea, further reduce reduction of discharging cost.Thus breakthrough achieve SO online in sintering process2, the collaborative reduction of discharging of two English.Desulfurization degree in embodiment 1-7 and two English emission reduction efficiency are as shown in Figure 3.
nullThe present invention is by analysing in depth iron and steel enterprise's crude fuel characteristic，And realize the pollution reduction of sintering process based on the creative proposition of the crude fuel characteristic of iron and steel enterprise by being layered dispensing and cloth，Dispensing by the collaborative compound (b) being furnished with additive reducing discharging the bed of material 3 in regulation sinter bed，And it is furnished with the compound (b) of additive with addition of there being urea granules，And pass through layer-by-layer distribution thus in sinter bed formed a wider collaborative reduction of discharging interval，On the one hand urea suppression sintering flue gas is added to generate two English during cooling，On the other hand by layering dispensing and cloth，The dispensing of the collaborative compound (b) being furnished with additive reducing discharging in the bed of material 3 of regulation，Decrease the Cu again producing region of two English、Cl plasma two English generates the content of catalyst，Thus further reduce the generation of sintering process two English；The temperature sintering flue gas is made to be reduced to below two English synthesis temperatures at the collaborative reduction of discharging bed of material 3.
It additionally, technical scheme is while suppressing two English to generate, is gathered in the SO of excessive moistening layer2React with urea, the collaborative bed of material 3 that reduces discharging is made to cover the generation layer of two English and the active position of desulfurization, reduce further the proportioning of urea, while reducing reduction of discharging cost, applicant has surprisingly found that emission reduction effect is further improved, thus breakthrough achieves sintering process SO2, the collaborative reduction of discharging of two English；In addition, technical scheme, only need to be adjusted least a portion of local dispensing in sinter bed, do not interfere with enterprise's existing crude fuel structure, and add a small amount of urea as reduction of discharging additive, the reduction of discharging of sintering process pollutant can be realized, alleviate the reduction of discharging burden of iron and steel enterprise, be that iron and steel enterprise realizes high efficiency, the pollution reduction of low cost provides a kind of technical strategies entirely.
Embodiment 2
Sintering process SO based on layering dispensing and cloth of the present embodiment2, two English work in coordination with the basic process of discharge-reducing method with embodiment 1, difference is: the bed of material total height (bed of material gross thickness) of the shop fixtures bed of material of the present embodiment the 1st, the first mixing bed of material the 2nd, the collaborative reduction of discharging bed of material 3 and the second mixing bed of material 4 is 800mm, the thickness wherein working in coordination with the reduction of discharging bed of material 3 is 110mm, and detects SO2, the generation concentration of two English, and calculate desulfurization degree, the emission reduction efficiency of two English, the desulfurization degree of the present embodiment is 86.12%, and the emission reduction efficiency of two English is 73.21%.
Embodiment 3
Sintering process SO based on layering dispensing and cloth of the present embodiment2, two English work in coordination with the basic process of discharge-reducing method with embodiment 1, difference is: the bed of material total height (bed of material gross thickness) of the shop fixtures bed of material of the present embodiment the 1st, the first mixing bed of material the 2nd, the collaborative reduction of discharging bed of material 3 and the second mixing bed of material 4 is 800mm, the thickness wherein working in coordination with the reduction of discharging bed of material 3 is 120mm, and detects SO2, the generation concentration of two English, and calculate desulfurization degree, the emission reduction efficiency of two English, the desulfurization degree of the present embodiment is 87.78%, and the emission reduction efficiency of two English is 73.89%.
Embodiment 4
Sintering process SO based on layering dispensing and cloth of the present embodiment2, two English work in coordination with the basic process of discharge-reducing method with embodiment 1, difference is: the bed of material total height (bed of material gross thickness) of the shop fixtures bed of material of the present embodiment the 1st, the first mixing bed of material the 2nd, the collaborative reduction of discharging bed of material 3 and the second mixing bed of material 4 is 800mm, the thickness wherein working in coordination with the reduction of discharging bed of material 3 is 130mm, and detects SO2, the generation concentration of two English, and calculate desulfurization degree, the emission reduction efficiency of two English, the desulfurization degree of the present embodiment is 88.64%, and the emission reduction efficiency of two English is 74.54%.
Embodiment 5
Sintering process SO based on layering dispensing and cloth of the present embodiment2, two English work in coordination with the basic process of discharge-reducing method with embodiment 1, difference is: the bed of material total height (bed of material gross thickness) of the shop fixtures bed of material of the present embodiment the 1st, the first mixing bed of material the 2nd, the collaborative reduction of discharging bed of material 3 and the second mixing bed of material 4 is 800mm, the thickness wherein working in coordination with the reduction of discharging bed of material 3 is 140mm, and detects SO2, the generation concentration of two English, and calculate desulfurization degree, the emission reduction efficiency of two English, the desulfurization degree of the present embodiment is 88.11%, and the emission reduction efficiency of two English is 75.68%.
Embodiment 6
Sintering process SO based on layering dispensing and cloth of the present embodiment2, two English work in coordination with the basic process of discharge-reducing method with embodiment 1, difference is: the bed of material total height (bed of material gross thickness) of the shop fixtures bed of material of the present embodiment the 1st, the first mixing bed of material the 2nd, the collaborative reduction of discharging bed of material 3 and the second mixing bed of material 4 is 800mm, the thickness wherein working in coordination with the reduction of discharging bed of material 3 is 150mm, and detects SO2, the generation concentration of two English, and calculate desulfurization degree, the emission reduction efficiency of two English, the desulfurization degree of the present embodiment is 87.58%, and the emission reduction efficiency of two English is 75.21%.
Embodiment 7
Sintering process SO based on layering dispensing and cloth of the present embodiment2, two English work in coordination with the basic process of discharge-reducing method with embodiment 1, difference is: the bed of material total height (bed of material gross thickness) of the shop fixtures bed of material of the present embodiment the 1st, the first mixing bed of material the 2nd, the collaborative reduction of discharging bed of material 3 and the second mixing bed of material 4 is 800mm, the thickness wherein working in coordination with the reduction of discharging bed of material 3 is 160mm, and detects SO2, the generation concentration of two English, and calculate desulfurization degree, the emission reduction efficiency of two English, the desulfurization degree of the present embodiment is 86.81%, and the emission reduction efficiency of two English is 75.34%.
Embodiment 8
Sintering process SO based on layering dispensing and cloth of the present embodiment2, two English work in coordination with the basic process of discharge-reducing method with embodiment 1, difference is: the bed of material total height (bed of material gross thickness) of the shop fixtures bed of material of the present embodiment the 1st, the first mixing bed of material the 2nd, the collaborative reduction of discharging bed of material 3 and the second mixing bed of material 4 is 800mm, wherein work in coordination with and reduce discharging in the bed of material 3 except adding urea to reduce discharging additive as two English, and applicant has been mixed into kaolin at the collaborative reduction of discharging bed of material 3, wherein kaolinic addition is the 0.01% of sinter bed gross mass, the percent of pass that this kaolin joins 200 mesh sieves is 75%, and detects SO2, the generation concentration of two English, and calculate desulfurization degree, the emission reduction efficiency of two English.Then, applicant has surprisingly found that, when the collaborative reduction of discharging condition such as the bed of material 3 thickness, urea proportioning is identical, the emission reduction efficiency of two English is improved, and the present embodiment desulfurization degree is 86.45%, and the emission reduction efficiency of two English is 73.79%.
Embodiment 9
Sintering process SO based on layering dispensing and cloth of the present embodiment2, two English work in coordination with the basic process of discharge-reducing method with embodiment 1, difference is: the 2nd, the shop fixtures bed of material of the present embodiment the 1st, the first mixing bed of material works in coordination with that to reduce discharging the bed of material total height (bed of material gross thickness) of the bed of material 3 and the second mixing bed of material 4 be 800mm.The siccative mass percent of described sinter mixture (a) is: Iron Ore Powder: 54.23%, returns mine: 27.90%, flux: 8.25%, fuel: 3.54%, iron-bearing auxiliary material: 6.08%；The Iron Ore Powder of described sinter mixture (a) is made up of card powder, Yang Di, SFHT, Kazakhstan powder and plum essence, and flux is by sky, lime stone and forms, and fuel is coal dust, and iron-bearing auxiliary material is formed by sintering dust, miscellaneous ore deposit and blast furnace ash；The mass percent of each component of siccative of described sinter mixture (a) is: card powder: 15.32%, Yang Di: 13.59%, SFHT:3.23%, Kazakhstan powder: 12.88%, plum essence: 9.21%, returns mine: 27.90%, sky: 3.88%, lime stone: 0.99%, quick lime: 3.38%, coal dust: 3.54%, sintering dust: 1.27%, miscellaneous ore deposit: 2.98%, blast furnace ash: 1.83%.The siccative mass percent wherein working in coordination with the compound (b) being furnished with additive reducing discharging the bed of material 3 is: Iron Ore Powder: 58.66%, returns mine: 27.90%, flux: 9.85%, fuel: 3.59%；The Iron Ore Powder of the described compound (b) being furnished with additive is made up of card powder, Yang Di, SFHT, Kazakhstan powder and plum essence, and flux is by sky, lime stone and forms, and fuel is coal dust；The mass percent of each component of siccative of the described compound (b) being furnished with additive is: card powder: 16.78%, Yang Di: 15.00%, SFHT:3.54%, Kazakhstan 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 height wherein working in coordination with the reduction of discharging bed of material 3 distance from bottom pallet 5 is 80mm, and wherein the addition of urea is the 0.02% of sinter bed gross mass, and described fuel is coal dust；Additionally, the boost pressure of described booster pump is 0.8KPa, the wind speed in control sack cleaner 9 is 0.75m/mim.And detect SO2, the generation concentration of two English, and calculate desulfurization degree, the emission reduction efficiency of two English, the desulfurization degree of the present embodiment is 84.48%, and the emission reduction efficiency of two English is 67.85%.
Embodiment 10
Sintering process SO based on layering dispensing and cloth of the present embodiment2, two English work in coordination with the basic process of discharge-reducing method with embodiment 1, difference is: the 2nd, the shop fixtures bed of material of the present embodiment the 1st, the first mixing bed of material works in coordination with that to reduce discharging the bed of material total height (bed of material gross thickness) of the bed of material 3 and the second mixing bed of material 4 be 800mm.The siccative mass percent of described sinter mixture (a) is: Iron Ore Powder: 55.27%, returns mine: 26.78%, flux: 8.15%, fuel: 3.58%, iron-bearing auxiliary material: 6.22%；The Iron Ore Powder of described sinter mixture (a) is made up of card powder, Yang Di, SFHT, Kazakhstan powder and plum essence, flux is by sky, lime stone and forms, fuel is made up of coke powder and coal dust, wherein fuel is made up of by the mass ratio of 1:1 coke powder and coal dust, and iron-bearing auxiliary material is formed by sintering dust, miscellaneous ore deposit and blast furnace ash；The mass percent of each component of siccative of described sinter mixture (a) is: card powder: 15.51%, Yang Di: 13.98%, SFHT:3.19%, Kazakhstan 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%, sintering dust: 1.23%, miscellaneous ore deposit: 3.17%, blast furnace ash: 1.82%.The siccative mass percent wherein working in coordination with the compound (b) being furnished with additive reducing discharging the bed of material 3 is: Iron Ore Powder: 59.64%, returns mine: 27.13%, flux: 9.61%, fuel: 3.62%；The Iron Ore Powder of the described compound (b) being furnished with additive is made up of card powder, Yang Di, SFHT, Kazakhstan powder and plum essence, flux is by sky, lime stone and forms, fuel is made up of coke powder and coal dust, and wherein fuel is made up of by the mass ratio of 1:1 coke powder and coal dust；The mass percent of each component of siccative of the described compound (b) being furnished with additive is: card powder: 17.01%, Yang Di: 15.50%, SFHT:3.52%, Kazakhstan 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%.
Wherein the height with the reduction of discharging bed of material 3 distance from bottom pallet 5 is 100mm, and wherein the addition of urea is the 0.05% of sinter bed gross mass；Additionally, the boost pressure of described booster pump is 1.0KPa, the wind speed in control sack cleaner 9 is 0.85m/mim.And detect SO2, the generation concentration of two English, and calculate desulfurization degree, the emission reduction efficiency of two English, the desulfurization degree of the present embodiment is 86.33%, and the emission reduction efficiency of two English is 72.17%.
Claims (5)
1. sintering process SO based on layering dispensing and cloth2, two English work in coordination with discharge-reducing method, it is characterised in that: concrete
Reduction of discharging step as follows:
Step one: sintered mix
(A) by Iron Ore Powder, return mine, flux, fuel and iron-bearing auxiliary material add batch mixer to carry out batch mixing, be prepared into after mixing
To sinter mixture (a)；
(B) by Iron Ore Powder, return mine, flux and fuel add batch mixer to carry out batch mixing, by solid Ammonia during batch mixing
Additive granules adds in compound, and the average grain diameter of described Ammonia additive granules is 0.30-0.50mm, makes after mixing
The standby compound (b) obtaining being furnished with additive；
Step 2: sintering feed
(A) the above shop fixtures bed of material (1) of mating formation at pallet (5)；
(B) sinter mixture (a) preparing in step one (A) is mated formation on the shop fixtures bed of material (1), formed
The first mixing bed of material (2)；
(C) compound (b) being furnished with additive preparing in step one (B) is mated formation in the first mixing bed of material (2)
Above, forming the collaborative bed of material (3) that reduces discharging, the distance of the described collaborative reduction of discharging bed of material (3) distance from bottom pallet (5) is
The 1/10-1/8 of sinter bed total height, the thickness of the collaborative reduction of discharging bed of material (3) is the 1/8-1/5 of sinter bed total height；
(D) again the sinter mixture (a) preparing in step one (A) is mated formation the collaborative reduction of discharging bed of material (3) above,
Form the second mixing bed of material (4)；
Step 3: fume centralized collection process
Carry out down draft sintering, during sintering machine down draft sintering, by the bellows of pallet (5) postmedian after igniting
The intensified pump of flue gas import sack cleaner (9), the boost pressure of described booster pump is 0.8-1.0KPa, control cloth bag remove
Wind speed in dirt device (9) is 0.75-0.85m/mim, and the sintering flue gas after sack cleaner (9) dedusting is introduced by pipeline and burns
Knot owner's flue (8).
2. a kind of sintering process SO based on layering dispensing and cloth according to claim 12, the collaborative reduction of discharging side of two English
Method, it is characterised in that: the siccative mass percent of the described compound (b) being furnished with additive is: Iron Ore Powder:
58.66%-60.14%, returns mine: 26.61%-27.90%, flux: 9.61%-9.85%, fuel: 3.59%-3.63%.
3. a kind of sintering process SO based on layering dispensing and cloth according to claim 22, the collaborative reduction of discharging side of two English
Method, it is characterised in that: the siccative mass percent of described sinter mixture (a) is: Iron Ore Powder: 54.23%-55.73%,
Return mine: 26.60%-27.90%, flux: 8.03%-8.25%, fuel: 3.54%-3.63%, iron-bearing auxiliary material: 6.01%-6.22%.
4. a kind of sintering process SO based on layering dispensing and cloth according to claim 12, the collaborative reduction of discharging side of two English
Method, it is characterised in that: the solid Ammonia in the compound (b) being furnished with additive of the described collaborative reduction of discharging bed of material (3) adds
Agent particle is urea granules, and wherein the addition of urea is the 0.02%-0.05% of sinter bed gross mass.
5. a kind of sintering process SO based on layering dispensing and cloth according to claim 3 or 42, two English are collaborative subtracts
Discharge method, it is characterised in that: the bellows of described postmedian are right below pallet (5) length direction 1/2-3/4 position
The bellows answered.
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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 |
| CN112501429B (en) * | 2020-11-30 | 2023-10-24 | 安徽工业大学 | SO in sintering process 2 、NO x Synergistic emission reduction method |
| CN112609072B (en) * | 2020-11-30 | 2023-10-31 | 安徽工业大学 | SO emission reduction used in sintering process 2 、NO x Method for preparing pellets of (2) |
| CN112725615B (en) * | 2020-12-22 | 2021-12-24 | 中冶长天国际工程有限责任公司 | Soaking sintering method based on layered composite heat supply |
| 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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| CN102242257A (en) * | 2011-06-30 | 2011-11-16 | 中南大学 | Flue gas circulation and biomass energy combined iron ore sintering method |
| CN103834800A (en) * | 2014-03-21 | 2014-06-04 | 安徽工业大学 | Online desulphurization method for sintering process |
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| CN103834800A (en) * | 2014-03-21 | 2014-06-04 | 安徽工业大学 | Online desulphurization method for sintering process |
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