CN102251100B - Method for sintering vanadium-titanium magnetite concentrate at high negative pressure and high air quantity - Google Patents
Method for sintering vanadium-titanium magnetite concentrate at high negative pressure and high air quantity Download PDFInfo
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Abstract
The invention discloses a method for sintering vanadium-titanium magnetite concentrate at high negative pressure and high air quantity, comprising preparing, mixing, distributing, igniting and sintering, thermally breaking, cooling and screening, wherein the sintering is carried out under the conditions of the negative pressure of over 13500a and the unit area air quantity of a sintering machine of 100-110m<3>(m<2>.min); and the low negative-pressure ignition and full-wind sintering are adopted in the igniting and sintering process. According to the method for sintering vanadium-titanium magnetite concentrate at high negative pressure and high air quantity, which is disclosed by the invention, the yield can be improved and vanadium-titanium sintering ore with high quality can be prepared at high efficiency.
Description
Technical field
The invention belongs to field of metallurgy, relate generally to and take v-ti magnetite concentrate and prepare efficiently the method for agglomerate as main raw material adopts high negative pressure Wind Volume.
Background technology
At present, Bf Burden is mainly high basicity sinter+acidic pellet ore+natural lump ore, the natural lump ore shortage of resources but pellet price is high, therefore, on blast furnace, pursue grog rate and mainly take agglomerate as main, in some blast furnace burdens, agglomerate even accounts for more than 90%.As can be seen here, pursue Sintering Yield and remain current main trend.
Along with the shortage of resource, the rich ore powder resource of nature high-quality is fewer and feweri, and fine ore after ore dressing is more and more for sintering.Vanadium titano-magnetite belongs to one of difficult ore burning, and its granularity of concentrate is thick, can have a strong impact on and granulate and sintering character.Produce only 50% left and right by the concentrate < 200 order grades of vanadium titano-magnetite, also have in actual production+1.0mm grade, be the thicker concentrate of granularity, and for common concentrate, granularity is less than 200 objects and generally can reaches more than 90%.
Conventionally, vanadium titano-magnetite concentrate (for example, the vanadium titano-magnetite concentrate that produce Panzhihua Region) is more regular spherical shape, and specific surface area is only 491.17cm
2/ g, a little less than its adhesive power on karyosome, balling-up extreme difference.The thermostability of compound spherolite is also poor, at the drying stage of sintering, is subject to mechanical presses and heat-flash airflow function, and concentrate comes off from karyosome, and ventilation property is worsened more.While concentrate TiO
2content is up to 12.8%-13.5%, Al
2o
3up to 4%-5%, the amount of liquid phase that sintering produces is few, thereby can affect sinter quality, all unfavorable to sintering and ironmaking.V-ti magnetite concentrate sintering is because ventilation property is poor, and sintering deficiency in draught, so do not taking under effective enhancements, for example, adopts general negative pressure 10000Pa left and right to carry out sintering, and productivity of sintering machine is less than 1.0t/ (m
2h), barrate strength is 65% left and right only, yield rate 50% left and right.Therefore, the steelmaking furnace technico-economical comparison that vanadium titano-magnetite concentrate is carried out to sintering with current sintering technology is poor, needs a kind of equipment condition and sintering method of intensified-sintered Increasing Production and Energy Saving.
Summary of the invention
For the problem existing in v-ti magnetite concentrate sintering in prior art, the invention provides a kind of high negative pressure Wind Volume that can adopt and v-ti magnetite concentrate is carried out to the method for sintering.Therefore, the invention provides and a kind ofly can take v-ti magnetite concentrate and be that main raw material adopts the method for high negative pressure Wind Volume sintering v-ti magnetite concentrate, thereby can prepare efficiently high quality vanadium titanium agglomerate.
The invention provides a kind of method of high negative pressure Wind Volume sintering v-ti magnetite concentrate, described method comprises batching, mixing, cloth, igniting sintering, heat is broken, cooling and screening, wherein, negative pressure be more than 13500Pa and sinter machine unit surface air quantity be 100-110m
3/ (m
2min) under condition, carry out sintering, adopt lower negative pressure igniting, full blast sintering.
According to the present invention, the starting stage at igniting sintering, ignition temperature can be controlled to 980 ℃-1080 ℃, the igniting bellows negative pressure control of sinter machine, built in 3000Pa-6000Pa, is lighted a fire to realize lower negative pressure.According to the present invention, in igniting sintering process, can make the aperture of air door of fan reach design the more than 90% of aperture, to realize full blast sintering.
According to the present invention, when cloth, bed thickness can be arranged as to 550mm-1000mm, wherein, in the bed of material, contain the grate-layer material of 20mm-40mm.
According to the present invention, when using design negative pressure to reach blower fan more than 16000Pa, the flue-gas temperature in the time of can be by sintering is controlled at below 160 ℃; When using design negative pressure lower than the blower fan of 16000Pa, the flue-gas temperature in the time of can be by sintering is controlled at below 130 ℃.
According to the present invention, can adopt high-efficiency electric dust catcher to carry out sub-system concentrated dust-removing, make smoke emissioning concentration at 80mg/m
3in.
According to the present invention, the seal cover board place at the bellows of the frame head and tail of sinter machine, can adopt gravity type boat davit hold-down gear to reduce air leak rate of air curtain.
According to the present invention, to the synchronous motor stator of the main exhauster of sinter machine and rotor, adopt air-cooler cooling, can make the temperature of motor stator and rotor be no more than 120 ℃; To motor bearings, adopt oil cooler cooling, can be by the cooling imported oil pressure-controlled of motor bearing, blower fan bearing shell at 0.11MPa-0.18MPa, motor, fan bearing temperature are no more than 65 ℃.
According to the present invention, can fix a silencer at outlet and/or the entrance of blower fan, and can wrap up sound-proof material at blower housing.
According to the present invention, when batching, gross weight based on batching, batching comprises the common breeze of vanadium titano-magnetite, 0-40%, the coke powder of 4%-6% or the hard coal of 5%-7%, the unslaked lime of 5%-9%, the activity ash of 1%-4% and the Wingdale of 1%-10% of 40%-80%, and when batching, can also additionally add weight is the returning mine of 30%-35% of batching gross weight.
According to the present invention, when mixing, mixture moisture can be controlled to 6.8%-7.5%, can adopt steam preheating mixing material that mixture temperature is reached more than 60 ℃.
Method according to high negative pressure Wind Volume sintering v-ti magnetite concentrate of the present invention, can improve output, prepares efficiently high-quality vanadium titanium agglomerate.
Embodiment
In sintering process, air quantity and negative pressure have decisive influence, according to sintering practice and test-results, Sintering Yield W=k * v
⊥, i.e. output W and vertical sintering speed v
⊥be directly proportional, and Δ P=k
1* Q
1.8, v
⊥=k
2* Q
0.9, sintering negative pressure Δ P is directly proportional to 1.8 powers of air quantity Q, vertical sintering speed v
⊥be directly proportional to 0.9 power of air quantity Q, v
⊥=k
3* (Δ P)
0.5, i.e. vertical sintering speed v
⊥be directly proportional to 0.5 power of negative pressure Δ P.Therefore, if improve output, must improve negative pressure, increase air quantity.Therefore, adopting high negative pressure and Wind Volume sintering is the sufficient condition that improves sinter machine production capacity.
At present, in the selection of air quantity and negative pressure, there are three kinds of situations: Wind Volume high negative pressure sintering, Wind Volume lower negative pressure sintering and little air quantity lower negative pressure sintering.This several method respectively has its feature, Wind Volume high negative pressure sintering generally be take fine ore as main, Wind Volume lower negative pressure sintering generally be take rich ore powder as main, little air quantity lower negative pressure sintering is generally not devote exclusive attention to output and the sinter machine of paying attention to quality and energy consumption adopts, so these three kinds of methods are selected according to practical situation mostly.
Sign the material characteristic in v-ti magnetite concentrate, the rule that affects on sintering index according to sintering negative pressure and air quantity, obtain higher yield and quality, inevitable requirement is taked high negative pressure Wind Volume sintering, and high negative pressure Wind Volume sintering refers to higher negative pressure and the air quantity of acquisition in sinter machine unit surface.Yet high negative pressure Wind Volume sintering exists some unfavorable factors.For example, negative pressure increases, and main air blower Δ P-Q curve is offset left; Air leak rate of air curtain increases, and bed of material compacting is shunk greatly, and agglomerate void content reduces, and vertical sintering speed is large, is unfavorable for that liquid phase crystallization reduces intensity, and high negative pressure blower fan power consumption is high simultaneously, the large environment that affects of noise.Therefore, carry out high negative pressure Wind Volume sintering to v-ti magnetite concentrate must have a whole set of supporting technology to coordinate, otherwise the ability of high negative pressure rotor can not bring into play, but also may have side effect.
Therefore, the invention provides a kind of improved method to v-ti magnetite concentrate (being preferably high-Ti type V-Ti magnetite concentrate) sintering.According to the present invention, adopt high negative pressure Wind Volume to carry out sintering to v-ti magnetite concentrate.Traditional sintering method comprises batching, mixing, cloth, igniting sintering, heat is broken, heat is sieved, cooling and screening.Different from traditional sintering method, according to the method for high negative pressure Wind Volume sintering v-ti magnetite concentrate of the present invention, comprise batching, mixing, cloth, igniting sintering, hot broken, cooling and screening.In the present invention, the blower fan of sinter machine adopts the rotor of high negative pressure Wind Volume, and more than the specified negative pressure of blower fan reaches 13500Pa, sinter machine unit surface air quantity is 100-110m
3/ (m
2min), to realize high negative pressure Wind Volume sintering.Because the present invention has adopted high negative pressure Wind Volume in sintering process, the heat that sintering mine sensible heat is taken away from blower fan increases, agglomerate temperature reduces, so can directly enter next step cooling step and not affect cooling performance without carry out again hot screening after heat is broken, thereby eliminated the disadvantageous effect of bringing to system job rate because of hot jig equipment failure, also reduced source of pollution, improved operating environment, cancelling heat sieve is one of development trend of current sintering industry simultaneously.
For fear of redundancy, no longer technique identical with the technique of traditional method in method of the present invention is described.Will be described in detail below according to the method for high negative pressure Wind Volume sintering v-ti magnetite concentrate of the present invention.
In the present invention, in cloth process, the bed of material be arranged thick as much as possible, to meet the sintering condition of high negative pressure Wind Volume.According to one embodiment of present invention, bed thickness can be 550mm-1000mm; For this reason, can be 600mm-1050mm by trolley breast plate height design.According to fan characteristic, negative pressure is higher, and draft is larger, and air quantity is larger.In the present invention, owing to carrying out high negative pressure sintering, so bed thickness contraction is larger, therefore need to improve bed thickness, increase the charge amount of sinter machine.In order to reach actual sintered negative pressure (supervisor's negative pressure) and the specified negative pressure of blower fan state in a basic balance, bed of material during the common lower negative pressure sintering of Thickness Ratio of the bed of material is thick, thereby increase bed of material resistance, the air quantity of blower fan is brought into play, and use for the sintering of compound on unit bed depth, for the bed of material, carry out the air quantity of a series of physical-chemical reaction required.If for example, bed depth too low (, being less than 550mm), resistance is inadequate, and blower negative pressure and air quantity can not be brought into play, are actually the potentiality of having wasted blower fan; The bed of material is too low simultaneously, drag reduction, and vertical sintering speed is too fast, thereby can affect sintering strength and yield rate.In addition, for example, if bed depth blocked up (, being greater than 1000mm), because the bed of material is blocked up, cause carrying out fully sintered to the bed of material, reduce vertical sintering speed, may cause in addition blower fan to load excessive and make smoke extractor generation surge, tripping operation, thereby affecting productive rate.
In addition, according to the present invention, by adopting grate-layer material technique to control the Dust Capacity of sintering process, to reduce the thermal strain impact and wearing and tearing of dust on fan rotor, thereby guarantee life-span and the safe operation of blower fan.In the present invention, by adopting grate-layer material technique, by the gauge control of grate-layer material at 20mm-40mm, to avoid sintered material directly to contact with grid section, reduce powder from grid section gap suction waste gas, strengthen grid section simultaneously and safeguard, the maintenance of strengthening head multi-tube dust cleaner or electrostatic precipitator improves efficiency of dust collection.The present invention adopts high-efficiency electric dust catcher to carry out sub-system concentrated dust-removing, guarantees that smoke emissioning concentration is at 80mg/m
3in.
In the present invention, the starting stage at igniting sintering process, ignition temperature is controlled to 980 ℃-1080 ℃, by lower negative pressure portfire, will light a fire bellows negative pressure control built in 3000Pa-6000Pa, to realize lower negative pressure igniting.The effect of igniting is that the ignited fuel in compound is caught fire, the burning-point of coke and coal dust is 700 ℃-850 ℃, therefore ignition temperature will be higher than solid fuel burning-point, simultaneously for avoid after the igniting of top layer agglomerate speed of cooling too fast (especially high negative pressure sintering speed of cooling is faster) affect intensity and yield rate, and in ignition process, supplement part heat, ignition temperature also will suitably improve, but for v-ti magnetite concentrate sintering, ignition temperature can not be controlled too high, for example, higher than 1200 ℃, in addition solid fuel ignition after lighting a fire, to make ore deposit, top layer crust and worsen ventilation property, also can generate the uhligite of strength at break.Therefore, in the present invention, ignition temperature is controlled to 1000 ± 50 ℃.Specifically, air quantity is consistent with the distribution of negative pressure for each bellows on sinter machine, but in sintering process, the coupling requirement to the negative pressure of each bellows and air quantity is different.Particularly for high negative pressure sintering, the negative pressure of head bellows is higher, disagree with the requirement of lower negative pressure igniting, for this (is generally three to the bellows below head lighter for ignition, but the invention is not restricted to this) aperture carry out strict control, by lower negative pressure portfire by bellows negative pressure control built in 3000Pa-6000Pa.Then carry out normal sintering process then.
In sintering process, carry out full blast sintering.The negative pressure of sintering main air blower is just to be determined by the aperture of air door of fan, and aperture reduces, and negative pressure and air quantity decline simultaneously, and vice versa.In order to give full play to the potential of main air blower, throttle opening must reach the maximum opening of design, for example, reach 90% of design aperture, etc.Therefore, in process of production as without Special Circumstances, air door of fan should standard-sized sheet, to implement full blast sintering.Take to be responsible for bellows negative pressure and air quantity properly distributed system, air quantity and negative pressure that sintering device handpiece, tail bellows distribute are low, and the negative pressure of stage casing bellows and air quantity are carried out full blast sintering.
According to the present invention, the blower fan of sinter machine adopts the rotor of high negative pressure Wind Volume, and more than the specified negative pressure of blower fan reaches 13500Pa, sinter machine unit surface air quantity is 100-110m
3/ (m
2min).Those skilled in the art should be understood that, because the air quantity of blower fan is relevant with sinter machine area, under identical negative pressure, sinter machine area difference is the air quantity difference of blower fan, so the air quantity of sinter machine unit surface is only provided in the present invention, once sinter machine area definition, can select the design air flow of blower fan, and do not have in the present invention the fixedly design area of sinter machine.In one embodiment of the invention, can use two main exhausters, yet, the invention is not restricted to this.In addition,, owing to leaking out and resistance of ducting loss, sinter machine flue (supervisor) negative pressure can be suitably lower than the specified negative pressure of blower fan.The negative pressure that it will be understood by those skilled in the art that blower fan is relevant with the structure of blower fan with air quantity, once determine negative pressure and the air quantity that blower fan will provide, just can select suitable blower fan according to this demand.Blower fan is in concrete use procedure, and the height of negative pressure and air quantity is to realize by adjusting the aperture of air door.In order not waste blower fan potentiality, air door requires standard-sized sheet.
In order to guarantee that v-ti magnetite concentrate is carried out to high negative pressure Wind Volume sintering, need to reduce the air leak rate of air curtain of exhausting system pipe network.Specifically, for high negative pressure sintering, because draft is excessive, air quantity is the weak link from system pipe network (poorly sealed) suction, rather than from the suction of bed of material top for sintering, this phenomenon is called leaks out.The air leak rate of air curtain of general sinter machine, in 40% left and right, that is to say to only have the effective wind rate of 60% left and right for sintering.When high negative pressure sintering, more easily leak out, leaking out all may appear in any link of exhausting system.In the present invention, main air leakage parts may, at the seal cover board place of the bellows afterbody of the frame head and tail of sinter machine, adopt gravity type boat davit hold-down gear to solve for leaking out herein.In the present invention, other air leakage parts mainly contains chassis and slideway contact position, bellows body, flue body, chassis and chassis junction, the bogie grates place of dropping, flue unload grey Double-deck cinder discharge valve, chassis head multi-tube dust cleaner or electric precipitator etc., for these air leakage parts, major measure is to take enhanced leaktightness and maintenance, and timely soldering leak stopping occurs leaking out.
In the present invention, also need by the sintering velocity of adjusting sinter machine, to control sinter fume temperature according to the size of negative pressure, to reduce the thermal strain impact and wearing and tearing of high temperature on fan rotor, thereby guarantee life-span and the safe operation of blower fan.High negative pressure rotor, because negative pressure is high, rotating speed is fast, gas velocity is fast, is controlled very strict to the temperature of flue gas.When fan design negative pressure reaches 16000Pa when above, by regulating the sintering velocity of (quickening) sinter machine that flue-gas temperature is controlled at below 160 ℃; When designing negative pressure lower than 16000Pa, by regulating the sintering velocity of (quickening) sinter machine that flue-gas temperature is controlled at below 130 ℃.
Conventionally, sintering machine main blower fan system is by motor, motor bearings, fan rotor, fan bearing, and cooling system forms.In the present invention, owing to carrying out sintering in high negative pressure condition, motor, blower fan turn round under high speed, so its bearing temperature should be cooled to specified requirement, motor stator and rotor adopt air-cooler cooling, and temperature is no more than 120 ℃; Bearing adopts oil cooler cooling, and the cooling imported oil pressure-controlled of motor bearing, blower fan bearing shell is at 0.11MPa-0.18MPa, and motor, fan bearing temperature are no more than 65 ℃.
In addition, in the present invention, need to guarantee smoke extractor steady running, prevent surge.Smoke extractor has noise, bearing shell vibration while turning round except body, alters the abnormalities such as axle, and operation of sintering machine is also the influence factor of steady running.When the bed of material is blocked up, resistance is too large, the rated load that has surpassed smoke extractor, or while there is huge fluctuation because of production technique factor such as mixture moisture, fixed carbon, size composition etc., smoke extractor operation is by unstable, running condition is by off-design operating point and fan performance curve, produce " breathing " and vibration, this thing happens, timely adjusting operation and processing parameter.
In addition, also adopted in the present invention fan operation noise reduction technology.The noise that high negative pressure rotor produces is very large, in order to address this problem, and by the outlet of large fan and/or entrance are fixed a silencer, and to large fan shell parcel sound-proof material, thereby reduce the pollution that noise causes plant environment.
In order to carry out better the method for high negative pressure Wind Volume sintering v-ti magnetite concentrate of the present invention, when batching, gross weight based on batching (various raw materials and fuel), batching comprises the common breeze of vanadium titano-magnetite, 0-40% of 40%-80%, the unslaked lime of the coke powder of 4%-6% or the hard coal of 5%-7%, 5%-9%, the activity ash of 1%-4% and the Wingdale of 1%-10%.In addition, can also be in when batching, additionally adding weight is the returning mine of 30%-35% of batching gross weight.Here, return mine refer to agglomerate cooling after through screening link, the fine fraction powder of screen underflow < 5mm, this part will be returned to sintering circuit and re-use, and the agglomerate of screen overflow > 5mm is for blast-furnace smelting.In the present invention, the cold ratio of returning mine in sintered material is 30%-35%, thereby realizes strengthening granulation technique.Adopt strengthening granulation technique, such as adopting unslaked lime, active ash etc., can improve the pellet performance of v-ti magnetite concentrate, thereby improve compound size composition and ventilation property, to realize deep-bed sintering.
According to the present invention, in batch mixing process, if mixture temperature, lower than 60 ℃, can produce " mud shape " material (that is, excessive moistening layer) in bed of material bottom after igniting, and worsen ventilation property.Adopt steam preheating mixing material, material temperature is reached more than 60 ℃, thereby eliminate the excessive moistening layer impact producing in sintering process.
Below in conjunction with specific embodiment, describe according to the method for high negative pressure Wind Volume sintering vanadium titano-magnetite concentrate of the present invention.
embodiment 1
1, adopt high negative pressure blower fan Wind Volume blower fan
(1) main exhauster is 2:
Air quantity: 19800m
3/ min (operating mode)
Blower fan import negative pressure: 16500Pa
Unit sintering area air quantity: Q=2 * 19800/360=110m
3/ (m
2min)
(2) head electric precipitator
Strict demand for high negative pressure blower fan to dust concentration, adopts two 330m by design
2horizontal three electric field electric precipitator, can reduce exhaust gas dust concentration to 80mg/m
3below, protection smoke extractor rotor.
Table 1 has below been listed the technical performance index of the high negative pressure equipment adopting according to embodiments of the invention 1.
Table 1 high negative pressure Fan Equipment technical feature
2, main exhausting system
Main exhausting system is comprised of main exhauster bellows, effuser, head electric precipitator and chimney.
Sinter machine has 20 bellows, and each bellows divides both sides exhausting along chassis width.Effuser is divided into two, and effuser is divided into stair-stepping three sections along its length, from afterbody to head diameter of section, become gradually greatly, and largest diameter 5.1m, effuser is divided into desulfurization system and non-desulfurization system.
In order to regulate two air quantity between effuser, the balance of temperature, a part of wind box branch pipe valve can switch mutually, and every effuser is provided with 5 groups of valves (realizing air quantity switches) totally 10 switching points in this embodiment.
Too high for preventing flue-gas temperature, protection head electric precipitator is respectively equipped with cold wind suction apparatus on two effusers, and at cold blast valve, ingress is provided with sourdine.
In double collecting main, flue gas enters respectively two 330m
2horizontal three electric field electric precipitator purify, then the two typhoon amounts that enter are 19800m
3/ min (operating mode) double suction enters centrifugal sintered exhauster.Sinter machine unit surface exhausting amount is about 110m
3/ min, vacuum fan import negative pressure 16500Pa.For reducing noise, in vacuum fan exit, be provided with sourdine.
The flue gas of two vacuum fan discharges enters atmosphere through flue, chimney.Chimney height is 100m, and chimney exit diameter is Φ 6.0m (internal diameter), and outlet flue gas flow rate is 23.34m/s.Chimney is skeleton construction.
Sinter fume after head electric precipitation purifies, the dust contained flue gas concentration≤80mg/Nm of discharge
3.
Sinter fume after head electric precipitation purifies, the dust contained flue gas concentration≤80mg/Nm of discharge
3.
The dust of effuser sedimentation, by power-driven double-layer cinder valve (knife edge type), is discharged on the rubber conveyer of the ▽ 0.00m of agglomerating chamber plane, with the little lattice bulk cargo of sinter machine, delivers to the agglomerate conveyor under central cooler, enters finished product screening dying grain system.Double-deck cinder discharge valve under effuser unloads ash by certain program self-timing.
3, main exhauster steady running Monitoring systems
In order to ensure main exhauster steady running, Fan Cooling System is implemented to on-line monitoring.
(1) main exhausting system
1. the monitoring such as motor, fan bearing temperature, bear vibration, oiling system cooling oil oil temperature, oil pressure;
2. smoke stack emission waste gas O
2, SO
2, NO
x, composition on-line analysis;
3. smoke stack emission exhaust gas and dust concentration on-line analysis;
4. main exhauster water coolant total flux is measured;
5. main exhauster entrance waste gas negative pressure, temperature, flow measurement;
6. oil cooler water inlet low flow, the off-limit alarm of water outlet high temperature;
7. cooler for motor water inlet low flow, the off-limit alarm of water outlet high temperature;
(2) main electric precipitator (2)
1. main electric precipitator exports exhaust gas and dust measurement of concetration;
2. main electric duster ash bucket material level upper and lower limit is reported to the police and is interlocked;
3. dust groove material level upper and lower limit is reported to the police and is interlocked;
4. the insulation can temperature survey of main electric precipitator top and upper and lower limit are reported to the police and are interlocked;
4, the supporting technology that coordinates high negative pressure Wind Volume sintering to take
(1) adopt the high negative pressure of 16500Pa, the thick bed of material of 700mm (the high 720mm of trolley breast plate);
(2) strengthen mixture operation, the two-stage mixing time adds up to 7.0min, further improves compound ballability, to improve bed permeability;
(3) for improving mixture temperature, improve bed permeability, reduce or eliminate excessive moistening layer, logical steam preheating mixing material in second drum mixer, adopts heating water to improve mixture temperature in first and second mixing machine;
(4) cancel hot jig and divide, eliminated the disadvantageous effect of bringing to system job rate because of hot jig equipment failure, also reduced source of pollution, improved operating environment simultaneously;
(5) waste gas of rotary forced-air cooler high temperature section is reclaimed, produce steam, be used for pre-heat mixture and waste hot gas for the insulation of sinter machine charge level, to reduce energy consumption;
(6) various raw materials carry out automatic blending in the ratio of setting, to stablize compound composition;
(7) select diclinic belt ignition furnace, adopted the technology of diclinic intersection burner direct ignition, igniting
(8) adopt grate-layer material technique, layer thickness 20mm-40mm, can reduce excessive moistening layer, and protection grid section, can reduce exhaust gas dust concentration again.
(9) adopt unslaked lime and solid fuel secondary to divide and add technique, be conducive to improve sinter strength and reduce solid fuel consumption.
5, system air leakage is administered
Adopt 360m
2sinter machine carries out high negative pressure sintering, sinter machine high loaded process, and pipe wear is very easily taken out leakage.Along with the increase of runtime, the problem that air leakage parts is many, air leak rate of air curtain is large comes out gradually, and frame head and tail seal cover board leaks out, and bellows Durchgangshohle is leaked out, and flue breathing joint leaks out, and head fly-ash separator is imported and exported loop expansion pipe joint flange place and leaked out.To bellows Durchgangshohle, the serious problems of leaking out, overhaul soldering at every turn and process, flue breathing joint is leaked out and adopted the stifled wind of outsourcing to process, to leaking out of head fly-ash separator import and export, adopt outsourcing defensive wall to process, joint flange is leaked out, adopt asbestos twine to fill and process; To the hot gas sintering pipeline expansion joint having damaged, adopting iron sheet to surround processes; 20 bellows of sinter machine are carried out to " bag box ", that is, the sealing of bellows adopts two-layer flexible (a kind of interlaced skeleton structure) asbestos plate Covered with Angles silk screen, and minimizing is leaked out, to box temperature insulation, improved stability and the sinter machine unit-hour output of operation of sintering machine simultaneously.
6, high negative pressure Wind Volume sintering operating performance
Adopt above-described step, adopt high negative pressure Wind Volume to carry out sintering to vanadium titano-magnetite concentrate.Table 2 has below been listed the test-results of different batches.
Table 2 360m
2sinter machine high negative pressure Wind Volume sintering technology effect
Control according to the method described above sintering operation, 360m
2sinter machine is under high negative pressure fan operation condition, and utilization coefficient is all greater than 1.30t/ (m
2h) design level, has obtained the effect of high good low consumption.For same sinter machine, in actual production, by regulating air door of fan aperture to change negative pressure and air quantity, along with the rising of negative pressure, the bed of material improves, and utilization coefficient rises, and tumbler index improves, and solid burnup reduces.As can be seen here, high negative pressure Wind Volume sintering is the effective ways that v-ti magnetite concentrate is intensified-sintered, improve output.
contrast experiment
Adopt different sinter machines, under different negative pressure, v-ti magnetite concentrate is carried out to sintering.Table 3 shows the main economic and technical indices of different size sinter machine under different condition of negative pressure.
Main economic and technical indices under the different condition of negative pressure of table 3 different size sinter machine
From table 3, along with the negative pressure rising of sinter machine, productivity of sintering machine and bed thickness rise, under high yield (utilization coefficient improves, and output increases) and the thick bed of material (auto accumulation heat effect strengthens, and energy-saving effect increases) effect, solid burnup reduces, and barrate strength rises.
Therefore, the method according to high negative pressure Wind Volume sintering v-ti magnetite concentrate of the present invention, can improve output, prepares efficiently high-quality vanadium titanium agglomerate.
The invention is not restricted to above-described embodiment, without departing from the spirit and scope of the present invention, can carry out various variants and modifications to embodiments of the invention.
Claims (4)
1. a method for high negative pressure Wind Volume sintering v-ti magnetite concentrate, described method comprises batching, mixing, cloth, igniting sintering, heat is broken, cooling and screening, wherein, in negative pressure, is more than 13500Pa to be 100-110m with sinter machine unit surface air quantity
3/ (m
2min) under condition, carry out sintering, and in igniting sintering process,
A: the starting stage at igniting sintering, ignition temperature is controlled to 980 ℃-1080 ℃, the igniting bellows negative pressure control of sinter machine, built in 3000Pa-6000Pa, is lighted a fire to realize lower negative pressure;
B: control throttle opening, make the aperture of air door of fan reach design the more than 90% of aperture, to realize full blast sintering;
C: when using design negative pressure to reach blower fan more than 16000Pa, the flue-gas temperature during by sintering is controlled at below 160 ℃; When using design negative pressure lower than the blower fan of 16000Pa, the flue-gas temperature during by sintering is controlled at below 130 ℃;
D: the synchronous motor stator of main exhauster and rotor adopt air-cooler cooling, make the temperature of motor stator and rotor be no more than 120 ℃; To motor bearings, adopt oil cooler cooling, by the cooling imported oil pressure-controlled of motor bearing, blower fan bearing shell, at 0.11MPa-0.18MPa, motor, fan bearing temperature are no more than 65 ℃;
E: adopt high-efficiency electric dust catcher to carry out sub-system concentrated dust-removing, make smoke emissioning concentration at 80mg/m
3in;
F: when batching, gross weight based on batching, batching comprises the vanadium titano-magnetite of 40%-80%, the unslaked lime of the common breeze of 0-40%, the coke powder of 4%-6% or the hard coal of 5%-7%, 5%-9%, the activity ash of 1%-4% and the Wingdale of 1%-10%, also adds in addition weight when batching is the returning mine of 30%-35% of batching gross weight.
2. method according to claim 1, is characterized in that, when cloth, bed thickness is arranged as to 550mm-1000mm, wherein, contains the grate-layer material of 20mm-40mm in the described bed of material.
3. method according to claim 1, is characterized in that, at the seal cover board place of the bellows of the frame head and tail of sinter machine, adopting gravity type boat davit hold-down gear to reduce air leak rate of air curtain.
4. method according to claim 1, is characterized in that fixing a silencer at outlet and/or the entrance of blower fan, and at blower housing parcel sound-proof material.
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| CN103114199B (en) * | 2013-03-12 | 2014-10-29 | 攀钢集团攀枝花钢钒有限公司 | Starting-up production method of sintering machine |
| CN103627894B (en) * | 2013-11-29 | 2015-09-16 | 攀钢集团攀枝花钢钒有限公司 | A kind of v-ti magnetite concentrate is with addition of the sintering method of spathic iron ore |
| CN103725872B (en) * | 2013-12-20 | 2015-07-22 | 攀钢集团成都钢钒有限公司 | Method for improving drum index of vanadium-titanium magnetite sinter |
| CN103924063A (en) * | 2014-04-04 | 2014-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for sintering all-vanadium titanium magnetite concentrate |
| CN104561530A (en) * | 2014-12-26 | 2015-04-29 | 河北钢铁股份有限公司承德分公司 | Medium-titanium high-strength sintered ore and preparation method thereof |
| CN104792176B (en) * | 2015-04-07 | 2017-03-01 | 马钢(集团)控股有限公司 | The device and method that a kind of continuous pallettype sintering machine start produces |
| CN104878195A (en) * | 2015-06-18 | 2015-09-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Sintering raw material composition and vanadium-titanium sintered ore and preparation method thereof |
| CN105063344B (en) * | 2015-08-20 | 2017-06-13 | 山西太钢不锈钢股份有限公司 | A kind of method of the sinter quality for improving the production of fine fraction Iron Ore Powder |
| CN107557571B (en) * | 2016-06-30 | 2018-12-04 | 鞍钢股份有限公司 | A kind of method and device of sinter mixture preheating and cloth |
| CN107502736A (en) * | 2017-08-22 | 2017-12-22 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of sinter mixture and its sintering method of Baima iron ore concentrate |
| CN111455120B (en) * | 2020-04-07 | 2022-02-08 | 武钢集团昆明钢铁股份有限公司 | Blast furnace smelting method based on high theoretical combustion temperature and low fuel ratio |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101717852A (en) * | 2009-11-12 | 2010-06-02 | 攀钢集团攀枝花钢钒有限公司 | Sintering method of high-Ti type V-Ti magnetite concentrate |
-
2011
- 2011-06-27 CN CN201110174638.3A patent/CN102251100B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101717852A (en) * | 2009-11-12 | 2010-06-02 | 攀钢集团攀枝花钢钒有限公司 | Sintering method of high-Ti type V-Ti magnetite concentrate |
Non-Patent Citations (2)
| Title |
|---|
| 攀钢360m2烧结机达产达效技术攻关与效果;杜斯宏等;《四川冶金》;20100630;第32卷(第3期);1-6，42 * |
| 杜斯宏等.攀钢360m2烧结机达产达效技术攻关与效果.《四川冶金》.2010,第32卷(第3期),1-6，42. |
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