CN102399926A - Furnace halt residue iron outlet method for middle and large-sized blast furnaces - Google Patents
Furnace halt residue iron outlet method for middle and large-sized blast furnaces Download PDFInfo
- Publication number
- CN102399926A CN102399926A CN2011103705462A CN201110370546A CN102399926A CN 102399926 A CN102399926 A CN 102399926A CN 2011103705462 A CN2011103705462 A CN 2011103705462A CN 201110370546 A CN201110370546 A CN 201110370546A CN 102399926 A CN102399926 A CN 102399926A
- Authority
- CN
- China
- Prior art keywords
- iron
- residual iron
- residual
- blast furnace
- mouth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a furnace halt residue iron outlet method for middle and large-sized blast furnaces, which comprises the following steps that: positions of double residue iron openings are determined at one side near an iron way; the residue iron openings and an iron outlet groove are made during the advanced wind stop; an iron tank used for accommodating the residue iron is matched and arranged on the iron way at the same side as the residue iron openings; and during the residue iron outlet, firstly, the residue iron opening in a high position is burnt to an open state through oxygen, and when the iron flow becomes small, the residue iron opening in a lower scale height position is burnt to an open state for residue iron outlet. When the method is adopted for furnace halt residue iron outlet, the safe and fast furnace halt can be realized, in addition, slag iron mixtures remained in a furnace cylinder are greatly reduced after the furnace halt, and the labor, material and money consumption is reduced for cleaning the residue in the furnace cylinder.
Description
Technical field
The invention belongs to technical field of blast furnace ironmaking, specifically, the present invention relates to a kind ofly not only be applicable to the medium-and-large-sized blast furnace of smelting high-titanium type vanadium-titanium magnetite but also be applicable to that the blowing out of the large blast furnace of smelting common ore deposit goes out the method for residual iron.
Background technology
For medium-and-large-sized blast furnace ironmaking, no matter be to smelt common ore deposit or smelting vanadium titano-magnetite, to produce through a generation after furnace life, blast furnace is in latter stage in furnace life, and body of heater is aging.The aging of blast furnace shows as usually: ftracture in cooling apparatus badly broken, stove skin many places, the stove skin is often rubescent, iron mouth degree of depth difficulty rises, iron mouth qualification rate reduces, bottom temperature raises; These all make the normal operation ratio of blast-furnace equipment reduce, and have influence on the normal safety in production of blast furnace.Add that high temperature sludge iron liquid is to the chemical erosion and the mechanical erosion effect of cupola well and bearth brick lining for many years, the cupola well volume that form latter stage blast-furnace production campaign increases, and has accumulated a large amount of slag iron.In view of the foregoing, all need carry out blowing out blast furnace is carried out large repairs, an important process during blowing out is the residual iron that need go out in the clean cupola well.
In order to judge whether the residual iron in the cupola well goes out only, usually, after the blowing out, whether completely how much remaining slag iron mixture is to weigh blowing out one of important symbol in the cupola well.At present, for medium-and-large-sized blast furnace (for example, 1200m
3Or 1350m
3The blast furnace of smelting high-titanium type vanadium-titanium magnetite) carrying out the blowing out overhaul advances; Usually adopt a residual iron mouth to go out residual iron; And the position of residual iron mouth is chosen in railway line one side usually, becomes the angle of 90 degree with the iron mouth at first section cooling fireplace skin, and carries out out the preparation work of residual iron.Then, blast furnace is hanged down the stockline blowing down in advance; When empty stockline, do not reclaim coal gas; Shaft is fed N
2And to the furnace roof spray cooling; The deep space stockline goes out residual iron at last below the air port, the method above adopting goes out residual iron, and the residual iron amount that at every turn goes out is approximately about 100 tons, and the residual iron amount that goes out with Theoretical Calculation differs more than one times; The most outstanding defective be to middle and later periods of tapping a blast furnace can not go out to the greatest extent by the residual iron cupola well internal mobility is poor, that physics heat is low; Thereby furnace outage time is prolonged; Since cause after the blowing out in the cupola well remaining in a large number coagulate iron; And the envrionment temperature of cupola well is high, does not go out clean slag, Jiao, coagulates iron and form plate, therefore causes in the time of plan the cupola well cleaning work not carry out on time.And, when clearing up the middle and later periods, cupola well also to blow out fried residual iron with explosive, and therefore, usually, the slag iron mixture in the cupola well thoroughly cleaned out needs 6～7 days time, thereby makes the overhaul time lengthening, thereby the cost of overhaul is raise.
For the blast-furnace smelting of high-titanium type vanadium-titanium magnetite, damaged investigation proves to body of heater through all previous blast furnace stopping: because the singularity of high-titanium type vanadium-titanium magnetite blast-furnace smelting contains TiO in the slag
2Higher, be generally 21%～22%, in secular smelting production process, in the cupola well zone because TiO
2Cross reduction and have a large amount of TiC, TiN and Ti (C; HMP dung such as N); Therefore after blowing out, be deposited in the burnt mixture of slag, when going out residual iron the flow velocity of molten iron reduced, make will the flow through resistance of residual iron mouth of molten iron increase; The path is elongated relatively, thereby causes after the blowing out amount of sedimentary cupola well residue big.
Summary of the invention
The present invention is intended to solve the problem that the blast furnace of smelting high-titanium type vanadium-titanium magnetite exists when blowing out, therefore, the invention provides a kind of blast furnace of smelting high-titanium type vanadium-titanium magnetite that is applicable to and when blowing out, can go out the method for residual iron effectively.
The invention provides a kind of blowing out that is used to smelt the blast furnace of high-titanium type vanadium-titanium magnetite and go out residual iron method, said blowing out goes out residual iron method and may further comprise the steps: in the position of confirming two residual iron mouths near a side of railway line; When blowing down in advance, make residual iron mouth and casting house; With the railway line of residual iron mouth homonymy on the equipped iron flask that is used to hold residual iron; When going out residual iron, earlier that the absolute altitude position is high residual iron mouth is boiled with oxygen, and when flowing molten iron diminished, again that the absolute altitude position is low residual iron mouth is boiled to go out residual iron, thereby goes out residual iron process during the completion blast furnace stopping.
According to an aspect of the present invention, a residual iron mouth in said two residual iron mouths is arranged on a side of the railway line of joining slag ladle, and another residual iron mouth is arranged on a side of the railway line of joining iron flask.
According to an aspect of the present invention, the step of the position of said definite two residual iron mouths comprises: the position of selecting two residual iron mouths in the both sides of blast furnace; Then, according to the bottom temperature of blast furnace both sides, hearth erosion thickness and stove skin temperature are confirmed the absolute altitude position of said two residual iron mouths.
According to an aspect of the present invention, the bottom temperature through the blast furnace both sides utilizes Mo Yixunke formula X=D/k * l/u * lg (tl/t) to confirm hearth erosion thickness, and wherein, X representes the residual thickness of furnace bottom.Unit is mm (or m); D representes the diameter of blast furnace hearth, and unit is mm (or m); Unit is m; K is for being not 2.36 (looking into the Mohs curve can get) according to coefficient, l/u=l/lge=2.3026; Tl representes the molten iron temperature of iron mouth medullary ray, and unit is ℃; T representes bottom temperature, and unit is ℃.According to the present invention; The residual thickness that total furnace bottom thickness through blast furnace deducts furnace bottom obtains hearth erosion thickness, then, confirms the theoretical absolute altitude position of residual iron mouth according to the corroding thickness of the residual iron mouth absolute altitude position of blast furnace and cupola well; According to the stove skin temperature of both sides at the bottom of the State of Blast Furnace the theoretical absolute altitude position of residual iron mouth is proofreaded and revised again; Wherein, elect the high position of stove skin temperature as absolute altitude high residual iron mouth, elect the position of stove skin time high some temperature as absolute altitude low residual iron mouth.
According to an aspect of the present invention, the step of residual iron mouth of said making and casting house is: during blowing down in advance, sever the stove skin by residual iron mouth select location, set the preparatory iron notch of predetermined size, between stove skin and cooling stave, fill out asbestos twine simultaneously; Good and dry the ditch that flows residual iron with the ditch backing strap of refractory mortar and pad ditch; Build complete casting house, simultaneously on railway, prepare the iron flask of the residual iron of splendid attire, install the connection groove between iron flask, the guiding molten iron flows into iron flask; When stockline is reduced to predetermined height, remove the bottom brick of predetermined depth, carry out iron mouth mud cover, the degree of depth is no less than 400mm, thereby accomplishes out the preparatory condition before the residual iron.
Blowing out according to the present invention goes out the method for residual iron, is not only applicable to smelt the large blast furnace in common ore deposit, and is applicable to the medium-and-large-sized blast furnace of smelting high-titanium type vanadium-titanium magnetite.
Adopt method of the present invention to carry out blowing out and go out residual iron, can realize blowing out safely and fast, and make after the blowing out and remain in that the slag iron mixture reduces in a large number in the cupola well, residue has reduced human and material resources, financial resources consumption in the cupola well in order to remove.
Description of drawings
Fig. 1 is a synoptic diagram of confirming the position of residual iron mouth according to of the present invention
Embodiment
The present invention goes out residual iron through adopting two residual iron mouths when the medium-and-large-sized blast furnace stopping; Can make total furnace outage time shorten 2 hours, after blowing out, the settling in the cupola well reduces (mainly being to coagulate iron to reduce) in a large number; And the residual iron amount that goes out increases; The actual iron amount and the theory amount of tapping a blast furnace that are gone out are more approaching, after the blowing out settling time of cleaning in the cupola well by shortened to 3 days in 7 days～4 days, thereby created favourable condition for the blast furnace maintenance reduction of erection time.It is pointed out that residual iron mouth is meant the outlet that on blast furnace, is used for discharging residual iron here.
To describe the method that the blowing out that is used for medium-and-large-sized blast furnace according to the present invention goes out residual iron in detail with reference to Fig. 1 below.Fig. 1 is a synoptic diagram of confirming the position of residual iron mouth according to of the present invention
The method that the blowing out that is used for medium-and-large-sized blast furnace according to the present invention goes out residual iron comprises the step that next coming in order are carried out: the position of confirming the two residual iron mouth that the absolute altitude position is different; When blowing down in advance, make residual iron mouth and casting house; With the railway line of these two residual iron mouth homonymies on equipped iron flask use in order to adorning residual iron; When going out residual iron, earlier that the absolute altitude position is high residual iron mouth is boiled with oxygen, treats that flowing molten iron sees hour, and then that the absolute altitude position is low residual iron mouth is boiled to go out residual iron, wherein, puts the slag situation according to the stokehold, rationally controls the rhythm that taps a blast furnace of the stokehold iron mouth in the furnace shutting down process.
Specifically; Go out the method for residual iron in the blowing out that is used for medium-and-large-sized blast furnace according to the present invention; Confirm the position of two residual iron mouths through following steps: at first, be convenient to the equipped railway line that is used to hold the iron flask of residual iron, selecting the position of two residual iron mouths near the homonymy of railway line; Then, confirm the absolute altitude position of two residual iron mouths according to bottom temperature, hearth erosion thickness and the stove skin temperature of blast furnace both sides.
Usually, for medium-and-large-sized blast furnace, near the railway line it divides two; Article one, be the railway line of joining slag ladle; Another is the railway line of joining iron flask, and wherein, these two railway lines are parallel to each other; An opposite side (the opposite location here is meant that the cupola well (furnace foundation) with blast furnace is the both sides at center, the position opposite of promptly residual iron mouth).According to the present invention, go out residual iron when utilizing two residual iron mouths to carry out blast furnace stopping, wherein, a residual iron mouth is a side of when the blast furnace ordinary production, joining the railway line of slag ladle; Another residual iron mouth is a side of when the blast furnace ordinary production, joining the railway line of iron flask, and is as shown in Figure 1, therefore, according to the present invention, two residual iron mouths is set, and these two residual iron mouths are positioned at the both sides respect to one another of blast furnace.Therefore, be meant that in these " blast furnace both sides " of mentioning being positioned at of blast furnace join near near the side the railway line of joining iron flask that is positioned at of a side and the blast furnace railway line of slag ladle.
The step of confirming two residual iron mouth absolute altitude positions according to of the present invention will be described in detail belows.
According to embodiments of the invention; Bottom temperature t according to blast furnace calculates the hearth erosion thickness X; And utilize infrared thermometer to measure the stove skin temperature of both sides at the bottom of the State of Blast Furnace, through the two combines to confirm the absolute altitude position of two residual iron mouths with hearth erosion thickness that calculates and the stove skin temperature that records.Specifically, utilize Mo Yixunke formula (following formula 1) to calculate the corroding thickness of cupola well according to the bottom temperature of blast furnace.
[formula 1]
X＝D/k×l/u×lg(tl/t)
In the superincumbent formula 1: X representes the residual thickness of furnace bottom, and unit is mm or m; D representes the diameter of blast furnace hearth, and unit is mm or m; K is not for according to coefficient (looking into the Mohs curve can get), k=2.36, l/u=l/lge=2.3026; Tl representes the molten iron temperature of iron mouth medullary ray, and unit is ℃; T representes bottom temperature, and unit is ℃.
Then; Residual thickness X through the furnace bottom that calculates confirms hearth erosion thickness (residual thickness of hearth erosion thickness=furnace bottom total thickness-furnace bottom); And then confirm the position of residual iron mouth, thereby obtain the theoretical absolute altitude position of residual iron mouth according to hearth erosion thickness.Simultaneously; According to the stove skin temperature (highs and lows) of furnace bottom both sides the theoretical absolute altitude position of the residual iron mouth that obtains is proofreaded and revised; Thereby obtain the actual elevation position of residual iron mouth; Wherein, elect the high position of stove skin temperature as absolute altitude high residual iron mouth, elect the position of stove skin time high some temperature as absolute altitude low residual iron mouth.Here, " absolute altitude " is meant that with the railway line under the blast furnace roadbed be zero rice, the vertical range of iron mouth (or residual iron mouth) medullary ray to railway line.
For the present invention is described better, the method for confirming two residual iron mouth absolute altitude positions according to of the present invention is described below by concrete example.
Suppose certain 1200m
3Blast furnace was produced 10 years, and the absolute altitude position of blast furnace taphole is 9.0m, and cupola well diameter D is 8.2m; Prepare the blowing out overhaul, wherein, the structure of furnace bottom is a clay brick; The ladle heel layer height is 800mm; Totally ten layers of clay bricks, the thickness of every layer of clay brick is 400mm, then the total thickness of furnace bottom is 400 * 10=4000mm.Measure the temperature of 6 positions at the bottom of the State of Blast Furnace respectively, obtain following table 1.Need to prove that these 6 some bottom temperatures are selected according to the representational temperature value of cupola well circumferential direction.
The blast furnace bottom temperature that table 1 is measured
| Sequence number | 1 | 2 | 3 | 4 | 5 | 6 | MV |
| Bottom temperature (℃) | 811 | 810 | 396 | 612 | 549 | 383 | 593.5 |
The molten iron temperature of measuring iron mouth medullary ray is that tl is 1400 ℃, and the medial temperature t of furnace bottom is 593.5 ℃.Then, utilize the residual thickness of Mo Yixunke formula calculating furnace bottom following:
X＝8.2/2.36×2.3026×lg(1400/593.5)＝2.982m
So hearth erosion thickness is: the residual thickness=4-2.982=1.018m of furnace bottom total thickness-furnace bottom.Therefore, the position of residual iron mouth should be below the medullary ray of iron mouth the position of 1.018+0.8=1.818m, so residual Tie Kou position absolute altitude is 9-1.818=7.182m.
According to the stove skin temperature (vertex and time high point) of infrared thermometer mensuration furnace bottom both sides residual Tie Kou position absolute altitude is proofreaded and revised again simultaneously; Thereby the set positions that stove skin temperature is the high high residual iron mouth that is absolute altitude, the set positions that stove skin temperature is low is the low residual iron mouth of absolute altitude.
Though described the concrete steps of confirming the position of two residual iron mouths above, the invention is not restricted to this.Those skilled in the art can confirm the position of two residual iron mouths at the railway line of blast furnace both sides according to practical situation under instruction of the present invention.
In addition, based on the present invention, the number of the iron flask that need confirm to dispose on the railway line based on the residual iron amount in the blast furnace also.Specifically, utilize following formula 2 to confirm the residual iron amount in it based on each parameter of blast furnace.
[formula 2]
In the superincumbent formula 2, T representes residual iron amount, and unit is a ton; D representes the diameter of blast furnace hearth, and unit is m; H representes the depth of erosion of cupola well, and unit is m; K is a coefficient, and span is confirmed the k value according to the erosion degree (corresponding to the corroding thickness of cupola well) of cupola well between 0.4～0.65, corrodes capping when serious; R representes the proportion of molten iron, and its value is 7.0 tons/m
3
According to one exemplary embodiment of the present invention, suppose that certain blast furnace produced 10 years, the cupola well diameter is 8.2m, 1.3 meters of the hearth erosion degree of depth, it is following then can to obtain residual iron amount according to formula 2:
Usually, the capacity of each iron flask is 90～100 tons, therefore, according to above calculated value, need join iron flask and be no less than 4, for safety, considers to also have a small amount of slag to flow out, and two residual iron mouths are all by 2 iron flask configurations.
Go out the method for residual iron in the blowing out that is used for medium-and-large-sized blast furnace of the present invention; The step of making residual iron mouth and casting house is following: during blowing down in advance; Sever the stove skin according to residual iron mouth select location, the preparatory iron notch of predetermined size is set, between by the stove skin of tapping and cooling stave, fill out asbestos twine simultaneously; Then, good and dry the ditch that flows residual iron with the ditch backing strap of refractory mortar and pad ditch; Improve and build complete casting house, on railway, prepare the iron flask of the residual iron of splendid attire simultaneously, install the connection groove between iron flask, the guiding molten iron flows into iron flask; When stockline is reduced to certain altitude, the bottom brick at residual iron mouth place is removed the predetermined degree of depth, carry out iron mouth mud cover, the degree of depth is no less than 400mm, thereby accomplishes out the preparation before the residual iron.
According to the present invention, the size of iron notch can be provided with according to the specification of blast furnace in advance.Specifically, for 1200～2000m
3Blast furnace is opened the preparatory iron notch of 600mm * 600mm, and the heat size I is smaller with suitably, and heat size greatly can be suitably big, be prerequisite to ensure safety and conveniently to go out residual iron with making iron mouth mud cover.According to the present invention; The ditch that flows residual iron is to process with fire-resistant ditch backing strap system and on the steel tank that refractory brick is built by laying bricks or stones; Because refractory brick and these two kinds of materials of ditch material all contain small amount of moisture; And the ditch that contains moisture is blasted when meeting high temperature liquid iron easily, thus must ditch be dried for the safety of tapping a blast furnace, to remove moisture.According to the present invention, for the blast furnace of clock-type furnace roof, adopt the clock-type cloth, stockline is meant the vertical range of the lower edge of great bell unlatching to the interior charge level of stove; For no clock furnace roof, with the blast furnace of chute cloth, stockline is meant the vertical range of the lower edge charge level in the stove when chute is vertical.
According to the present invention, when stockline was reduced to certain altitude (for example, being 12 meters), blast furnace carried out blowing down in advance, during damping down, removes the bottom brick of predetermined depth (for example, being 150mm) inwards from previously selected residual iron mouth, carries out iron mouth mud cover then.Specifically, (for example, the degree of depth is 150mm with the hole of the residual iron mouth place degree of depth with refractory mortar; Width is the hole of 600mm) tamp, compress, the slit between stove skin and iron mouth is filled up and compressed, and outwards form a boss; Total depth is approximately 400mm; Scratching a diameter at the center is that 80mm, the degree of depth are the circular hole of 300mm, and dries moisture, makes it have certain rigidity.Therefore, according to the present invention, iron runner and residual iron mouth join, and the gradient is 10～12 degree, and wide is 800～900mm, and the degree of depth is 300～400mm, and joins with the iron flask that is configured on the railway line, thereby when going out residual iron, lets molten iron flow to iron flask smoothly.
Go out the method for residual iron in the blowing out that is used for medium-and-large-sized blast furnace of the present invention, with the railway line of residual iron mouth homonymy on the assembling iron flask being used to adorn residual iron, and the iron flask configuration is put in place, install the connection casting runner groove between iron flask simultaneously, thereby possess the condition of tapping a blast furnace.
Go out the method for residual iron in the blowing out that is used for medium-and-large-sized blast furnace of the present invention; When going out residual iron, earlier that the absolute altitude position is high residual iron mouth is boiled with oxygen, treats that flowing molten iron sees hour (promptly; When the flow of flowing molten iron diminishes), and then the residual iron mouth that the absolute altitude position is low is boiled goes out residual iron.
In the present invention, put the slag situation according to the stokehold, during blowing out; The cinder notch of stokehold is in slagging, and the slag of discharging from cinder notch is last slag, if the process of slag finds that cinder notch has a small amount of ornamental work of iron ejection on discharging; Then the molten iron that is melted in the cupola well of explanation need be from the discharging of iron mouth, ensure thus cinder notch safety (because cinder notch is a copper sheathing, interior logical recirculated water; The iron mouth is that refractory mortar forms), thus stokehold Tie Kou in the furnace shutting down process rhythm that taps a blast furnace rationally controlled.The step of controlling the rhythm that taps a blast furnace is following: in order to reduce the workload of clearing up the cupola well residue after the blowing out; Take in the empty stockline process of blowing out, suitably to reduce the method for the number of casts; Especially last iron is apart from the timed interval proper extension of a preceding iron; Can make to store a certain amount of slag iron in the cupola well, can stock column be raised like this, make coke as far as possible in air port and air port above position burning.After the above coke in air port fully burns; Organize stokehold Tie Kou to go out last iron again, the rhythm thereby control is tapped a blast furnace, the reason of controlling the rhythm that taps a blast furnace is following: the coke more than the air port is after fully burning; The slag iron good fluidity that provides heat to make fusing simultaneously; Because of arriving the blowing out later stage, the furnace heat loss is bigger, and the amplitude that the temperature of molten iron temperature and slag reduces is very fast; The lowering speed of furnace charge blasts the air quantity combustion of coke by the air port and accomplishes; During blowing out; Blast the air quantity in air port, because blast is much larger than roof pressure, so gas flows to blast furnace top fast; Generally can only be to the coke sufficient combustion more than the air port, particularly the coke at slag iron interface is then nonflammable below the air port.Therefore, in furnace shutting down process, if the stokehold number of casts is many, the remaining slag iron of cupola well is with regard to less and the coke that immerses in the slag iron will increase, and the slagging card that taps a blast furnace is burnt serious, causes last stokehold to go out slag iron not to the utmost, makes the workload increase of cleaning cupola well after the blowing out; Therefore, through above method, coke is fully burnt; Coke residual after the blowing out is less; Provide the slag iron that heat makes fusing to keep good flowability simultaneously, be convenient to stokehold iron mouth and residual iron mouth and discharge, it is less with the meeting of slag Jiao mixture to remain in the cupola well residual iron like this after the blowing out.
Blowing out according to the present invention goes out the method for residual iron, is not only applicable to smelt the large blast furnace in common ore deposit, and is applicable to the medium-and-large-sized blast furnace of smelting high-titanium type vanadium-titanium magnetite.
Specifically, for the large blast furnace of smelting common ore deposit, generally along with the increase of heat size, the cupola well diameter also increases thereupon, for example, and for heat size 1200m
3The blast furnace that level is above, cupola well diameter be all more than 8 meters, 2000m
3The cupola well diameter be 10 meters.In traditional going out in the residual iron method, adopt a residual iron mouth to tap a blast furnace, because the effect of the cooling of fetching water in relative length in the path that molten iron is flowed through and the furnace shutting down process stove, the temperature drop of molten iron is very fast, the amount of molten iron stream iron notch will reduce.After the blowing out cupola well is carried out breakage investigation and find that residual iron residual in its rightabout cupola well is more, taps a blast furnace and adopt aforesaid method of the present invention to carry out blowing out, can make after the blowing out to remain in that the slag iron mixture reduces in a large number in the cupola well circumference.Whether thorough, successful safety during blowing out, go out the residual iron of clean cupola well efficiently, make a large amount of minimizing of residue in the cupola well, be to weigh one of blowing out important symbol.Therefore, adopt method of the present invention to go out residual iron and can realize blowing out safely and fast, and make after the blowing out and remain in that the slag iron mixture reduces in a large number in the cupola well, residue has reduced human and material resources, financial resources consumption in the cupola well in order to remove.
For the blast-furnace smelting high-titanium type vanadium-titanium magnetite, because its singularity contains TiO in the slag
2Higher, be generally 21%～22%, in secular smelting production process, in the cupola well zone because TiO
2Cross reduction and have a large amount of TiC, TiN and Ti (C; HMP dung material such as N); Therefore after blowing out, be deposited in the burnt mixture of slag, when going out residual iron the flow velocity of molten iron reduced, make will the flow through resistance of residual iron mouth of molten iron increase; The path is elongated relatively, thereby sedimentary cupola well residue amount is big after causing blowing out; Simultaneously, a blast furnace production generation is after furnace life, and the refractory brick of cupola well and furnace bottom corrodes comparatively serious; The remaining residual iron amount of cupola well in traditional going out in the residual iron method, adopts a residual iron mouth to tap a blast furnace along with the time increases gradually; But since cupola well circumference and the rightabout area deposition of residual iron mouth to coagulate iron more, the man power and material of cupola well residue cleaning work consumption is bigger, causes the overhaul time lengthening; The cost of overhaul is raise, according to another embodiment of the present invention, through adopting aforesaid method of the present invention; A residual iron mouth respectively is set in the both sides of blast furnace railway line; Thereby when blowing out is tapped a blast furnace, molten iron residual in the blast furnace is flowed out apace, remain in that the slag iron mixture reduces in a large number in the cupola well circumference thereby can make.Therefore, adopt method of the present invention to go out residual iron and can realize blowing out safely and fast, and make after the blowing out and remain in that the slag iron mixture reduces in a large number in the cupola well, residue has reduced human and material resources, financial resources consumption in the cupola well in order to remove.
Those skilled in the art are noted that under the situation that does not break away from the spirit or scope of the present invention, can make various modifications and change in the present invention.Therefore, the invention is intended to cover modification of the present invention and change, as long as these modifications and change fall in the scope of claims and equivalent thereof.
Claims (6)
1. a blowing out that is used for medium-and-large-sized blast furnace goes out the method for residual iron, it is characterized in that the method that said blowing out goes out residual iron may further comprise the steps:
In the position of confirming two residual iron mouths near a side of railway line;
When blowing down in advance, make residual iron mouth and casting house;
With the railway line of residual iron mouth homonymy on the equipped iron flask that is used to hold residual iron;
When going out residual iron, earlier that the absolute altitude position is high residual iron mouth is boiled with oxygen, and when flowing molten iron diminished, again that the absolute altitude position is low residual iron mouth is boiled to go out residual iron, thereby goes out residual iron process during the completion blast furnace stopping.
2. blowing out according to claim 1 goes out the method for residual iron, it is characterized in that a residual iron mouth in said two residual iron mouth is arranged on a side of the railway line of joining slag ladle, and another residual iron mouth is arranged on a side of the railway line of joining iron flask.
3. blowing out according to claim 2 goes out the method for residual iron, it is characterized in that saidly confirming that the step of the position of two residual iron mouths comprises: select the position of two residual iron mouths at blast furnace near the both sides of railway line; Then, confirm the absolute altitude position of said two residual iron mouths according to bottom temperature, hearth erosion thickness and the stove skin temperature of blast furnace both sides.
4. blowing out according to claim 3 goes out the method for residual iron, it is characterized in that the formula below the bottom temperature utilization of blast furnace both sides is confirmed hearth erosion thickness,
X＝D/k×l/u×lg(tl/t)
Wherein, X representes the residual thickness of furnace bottom, and unit is mm; D representes the diameter of blast furnace hearth, and unit is mm; K is not for according to coefficient; L/u=2.3026; Tl representes the molten iron temperature of iron mouth medullary ray, and unit is ℃; T representes bottom temperature, and unit is ℃,
The residual thickness that total furnace bottom thickness through blast furnace deducts furnace bottom obtains hearth erosion thickness; Then; Confirm the theoretical absolute altitude position of residual iron mouth according to the stove skin temperature of both sides at the bottom of the State of Blast Furnace the theoretical absolute altitude position of residual iron mouth to be proofreaded and revised again, wherein according to the corroding thickness of the residual iron mouth absolute altitude position of blast furnace and cupola well; Elect the high position of stove skin temperature as absolute altitude high residual iron mouth, elect the position of stove skin time high some temperature as absolute altitude low residual iron mouth.
5. blowing out according to claim 1 goes out the method for residual iron; The step that it is characterized in that residual iron mouth of said making and casting house is: during blowing down in advance; Sever the stove skin by residual iron mouth select location, set the preparatory iron notch of predetermined size, between stove skin and cooling stave, fill out asbestos twine simultaneously; Good and dry the ditch that flows residual iron with the ditch backing strap of refractory mortar and pad ditch; Build complete casting house, on railway, prepare the iron flask of the residual iron of splendid attire simultaneously, install the connection groove between iron flask, the guiding molten iron flows into iron flask; When stockline is reduced to predetermined height, remove the bottom brick of predetermined depth, carry out iron mouth mud cover, the degree of depth is no less than 400mm, thereby accomplishes out the preparation before the residual iron.
6. blowing out according to claim 1 goes out the method for residual iron, it is characterized in that said medium-and-large-sized blast furnace is the medium-and-large-sized blast furnace that is used to smelt the large blast furnace in common ore deposit or is used to smelt high-titanium type vanadium-titanium magnetite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103705462A CN102399926B (en) | 2011-11-21 | 2011-11-21 | Furnace halt residue iron outlet method for middle and large-sized blast furnaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103705462A CN102399926B (en) | 2011-11-21 | 2011-11-21 | Furnace halt residue iron outlet method for middle and large-sized blast furnaces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102399926A true CN102399926A (en) | 2012-04-04 |
| CN102399926B CN102399926B (en) | 2013-06-12 |
Family
ID=45882569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103705462A Active CN102399926B (en) | 2011-11-21 | 2011-11-21 | Furnace halt residue iron outlet method for middle and large-sized blast furnaces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102399926B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215398A (en) * | 2013-05-15 | 2013-07-24 | 莱芜钢铁集团有限公司 | Blast furnace overhauling residual iron placing device and method |
| CN107119158A (en) * | 2017-06-09 | 2017-09-01 | 河钢股份有限公司承德分公司 | A kind of residual iron placing method of schreyerite steelmaking furnace |
| CN108085440A (en) * | 2017-12-14 | 2018-05-29 | 安徽马钢设备检修有限公司 | Stove method is taken off in a kind of blast furnace overhaul |
| CN109295271A (en) * | 2018-11-27 | 2019-02-01 | 南京钢铁股份有限公司 | A kind of method that blast furnace stockline dropping blowing out extends the gas recovery time |
| CN111334630A (en) * | 2020-04-10 | 2020-06-26 | 北京首钢股份有限公司 | Blast furnace thermocouple repairing method |
| CN111809012A (en) * | 2020-07-04 | 2020-10-23 | 北京首钢建设集团有限公司 | Construction method for removing accumulated iron in iron-making blast furnace by using residual iron discharging mode |
| CN113528726A (en) * | 2021-07-14 | 2021-10-22 | 攀钢集团攀枝花钢钒有限公司 | Structure and operation method for discharging more residual iron from blast furnace |
| CN114686625A (en) * | 2022-01-29 | 2022-07-01 | 北京首钢股份有限公司 | Method for discharging residual iron from blast furnace |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071272A (en) * | 2009-11-24 | 2011-05-25 | 攀钢集团钢铁钒钛股份有限公司 | Method for blowing out blast furnace |
-
2011
- 2011-11-21 CN CN2011103705462A patent/CN102399926B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071272A (en) * | 2009-11-24 | 2011-05-25 | 攀钢集团钢铁钒钛股份有限公司 | Method for blowing out blast furnace |
Non-Patent Citations (1)
| Title |
|---|
| 刘军等: "攀钢一高炉空料线降料面停炉操作实践", 《四川冶金》, vol. 32, no. 3, 30 June 2010 (2010-06-30), pages 51 - 54 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215398A (en) * | 2013-05-15 | 2013-07-24 | 莱芜钢铁集团有限公司 | Blast furnace overhauling residual iron placing device and method |
| CN103215398B (en) * | 2013-05-15 | 2015-02-18 | 莱芜钢铁集团有限公司 | Blast furnace overhauling residual iron placing device and method |
| CN107119158A (en) * | 2017-06-09 | 2017-09-01 | 河钢股份有限公司承德分公司 | A kind of residual iron placing method of schreyerite steelmaking furnace |
| CN108085440A (en) * | 2017-12-14 | 2018-05-29 | 安徽马钢设备检修有限公司 | Stove method is taken off in a kind of blast furnace overhaul |
| CN108085440B (en) * | 2017-12-14 | 2019-07-02 | 安徽马钢设备检修有限公司 | Furnace method is taken off in a kind of blast furnace overhaul |
| CN109295271A (en) * | 2018-11-27 | 2019-02-01 | 南京钢铁股份有限公司 | A kind of method that blast furnace stockline dropping blowing out extends the gas recovery time |
| CN109295271B (en) * | 2018-11-27 | 2020-07-14 | 南京钢铁股份有限公司 | Method for prolonging time for recovering coal gas by blowing out blast furnace empty material line |
| CN111334630A (en) * | 2020-04-10 | 2020-06-26 | 北京首钢股份有限公司 | Blast furnace thermocouple repairing method |
| CN111809012A (en) * | 2020-07-04 | 2020-10-23 | 北京首钢建设集团有限公司 | Construction method for removing accumulated iron in iron-making blast furnace by using residual iron discharging mode |
| CN113528726A (en) * | 2021-07-14 | 2021-10-22 | 攀钢集团攀枝花钢钒有限公司 | Structure and operation method for discharging more residual iron from blast furnace |
| CN114686625A (en) * | 2022-01-29 | 2022-07-01 | 北京首钢股份有限公司 | Method for discharging residual iron from blast furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102399926B (en) | 2013-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102399926B (en) | Furnace halt residue iron outlet method for middle and large-sized blast furnaces | |
| CN100595284C (en) | Maintaining method for blast furnace | |
| CN103436703B (en) | Total-oxygen side-blown reduction smelting converter | |
| CN102337361A (en) | Method for positioning discharged residual iron during overhaul of blast furnace | |
| CN108866270A (en) | A kind of steelmaking equipment | |
| CN106319118B (en) | A kind of method for extending blast furnace copper cooling stave service life | |
| CN101921887B (en) | Maintenance method of blast furnace liner | |
| CN105368995B (en) | A kind of furnace charge method of replacing under blast furnace accident | |
| CN203559063U (en) | Blast furnace thin-wall lining | |
| CN103276278B (en) | A kind of fusion reducing furnace for smelting laterite-nickel ores | |
| CN102134620B (en) | Blast furnace shaft upper part rapid heating for producing lining by wet method | |
| CN211570689U (en) | On-line heating device for carbon heat conducting material special for industrial kiln | |
| CN102534092B (en) | Method for protecting top-bottom combined blown converter | |
| CN209802102U (en) | Scrap steel preheating device | |
| CN102978319B (en) | Energy-saving environment-friendly laterite-nickel ore smelting apparatus and process | |
| CN206739336U (en) | A kind of converter dedusting line flue automatic ash removing device | |
| CN203011125U (en) | Waste heat recovery device for cupola furnace | |
| CN115354095B (en) | Method for treating and preventing serious heat loss of blast furnace hearth | |
| CN202415385U (en) | High-temperature ceramic welding repair device | |
| JP2002115007A (en) | Structure for inner wall surface at lower part in blast furnace | |
| CN208382849U (en) | A kind of energy-saving blast cupola | |
| CN104073579A (en) | Schreyerite furnace protection method and device | |
| CN106369992A (en) | Smelting furnace for synchronously smelting reduced pig iron and ore-rock wool | |
| JPH064195Y2 (en) | Vertical heat exchanger | |
| CN201082888Y (en) | Blast furnace tray water tank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |