CN86103119A - Blast furnace process to downdraft - Google Patents
Blast furnace process to downdraft Download PDFInfo
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- CN86103119A CN86103119A CN 86103119 CN86103119A CN86103119A CN 86103119 A CN86103119 A CN 86103119A CN 86103119 CN86103119 CN 86103119 CN 86103119 A CN86103119 A CN 86103119A CN 86103119 A CN86103119 A CN 86103119A
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Abstract
To the blast furnace process of downdraft, relate to the technical field of blast furnace ironmaking.
Technology of the present invention mainly is to utilize the disposable downdraft pipeline of the preceding device of a kind of baker in blast furnace hearth inside.Method by downdraft is carried out blast oven and igniting, and is aided with other corresponding techniques operation measures, can improve stove quality and baker speed; Very promptly improve the temperature of cupola well bottom after the blow-on; And can early draw coal gas safely and burn hotblast stove.Guarantee that blow-on is rapid, smooth, easy, economical.
Description
The present invention relates to technical field of blast furnace ironmaking.
Behind the blast furnace opening, the coke of cupola well bottom is warmed up on the smooth and easy needed temperature that flows of slag iron equably, successfully gone out first and second stove molten iron, this is the key of blow-on success or not, also is the main standard of examination blast furnace opening state of the art.
Though the full coke open furnace method of promoting is had large improvement than the sleeper blow-on method of gradually eliminating at present.But the temperature that also is difficult to guarantee the cupola well bottom bring up to equably rapidly slag iron Channel Group temperature required more than.So that there is following weak point:
1. can not thoroughly solve the problem of blow-on initial stage blast furnace top heat surplus and bottom shortage of heat.Thereby be difficult to guarantee the quality of first and second stove molten iron after the blow-on and reduce the burnt amount of blow-on consumption.
2. near the furnace bottom edge annular zone beyond the iron mouth is a hot coal air-flow dead angle area.Before the second stove iron, a large amount of slag iron can solidify in this zone or viscosity increases, and influence blast furnace and more promptly carry out the transition to normal smelting after the blow-on.
3. blow-on initial stage is owing to exist the internal cause and the external cause of gas explosion.The time of drawing coal gas is " peaceful evening is not early " generally all.
4. full stove blow-on coke ratio height, empty Jiao of follow-up material is also more, in order to improve the flowability of slag.Also to use fluorite more, cause waste economically.
A kind of downdraft method that the U.S2463733 patent provides a kind of blast furnace that is used for long-term or short-term banking to adopt when answering wind.The essential characteristic of this method is to be equipped with one to have the pipeline that cuts down Men Bingyu air port peep hole UNICOM between blast-furnace hot-air surrounding pipes and iron notch.During furnace compound wind, utilize this pipeline that combustion air is introduced iron notch and assist blowing, though this method has certain effect near the cupola well temperature of lower the raising iron mouth.But: (1) this device can only make wind be blown near the iron mouth 0.5 meter with interior bag-like region, and after blow-on during winding-up iron mouth, it is very fast that iron mouth near zone heats up, and need not make an unnecessary move when new stove blow-on.(2) this device still can not solve and eliminate hot coal air-flow dead angle area, early draws coal gas, accelerate problem such as baker speed.
At above-mentioned these situations, the objective of the invention is:
1. by improving method to the furnace bottom balanced ventilation, the temperature of guaranteeing the cupola well bottom can evenly, promptly bring up to slag iron Channel Group temperature required on, thoroughly solve the principal contradiction of blow-on initial stage smelting process.
2. draw coal gas ahead of time than existing blow-on technology and burn hotblast stove, reclaim the high coal gas of calorific value more.Reduce topsoil, accelerate to carry out the transition to the speed of ordinary production.
3. improve the quality of blast-furnace hot-air baker, accelerate the speed of hot-blast baker.
Design principle of the present invention and substance are: can break through partial layer gas film thermofin on the solid surface according to jet flow, reduce " thermal resistance " of transmission of heat by convection between hot blast and the cryogenic solid, thereby accelerate baker speed; Make the coke of cupola well bottom lean on the principles such as intensification equably of self burning rapidly, following two measures be provided at the blow-on initial stage:
1. before blast oven, in cupola well, install the pipeline of at the bottom of the disposable blast furnace of the even jet flow of furnace bottom, to blow earlier on the furnace bottom.
2. adopt a series of and the baker that adapts to the blast furnace downdraft, igniting.The blow-in method that draws coal gas, furnace condition temper.
Figure one is the structural representation of air-supply pipeline at the bottom of the State of Blast Furnace.
Figure two passes through the big cover of cinder notch when the downdraft comb is supplied with wind with the outer airduct of stove, the scheme of installation of upright airduct top elbow.
Specific embodiments of the present invention is as follows:
One, at the bottom of the State of Blast Furnace air-supply pipeline structure referring to figure one and figure two, (1) blast furnace lining, (2) iron mouth medullary ray among the figure, (3) space, (13) bell and spigot, (14) steel bar in cinder notch medullary ray, (5) iron mouth, (6) air-supply comb, (7) pad brick, (8) comb spurt hole, (9) upright blast pipe, the outer airduct of (10) stove, the big cover of (11) cinder notch, (12) cupola well, the bolt that (15) cinder notch puts are greatly gone up in air port medullary ray, (4).
Air-supply comb (6) among the figure is formed the specification φ of pipe (104～150) * (2～4) m/m by an arc (or broken line) pipe and some straight tubes.The radical of straight tube=(cupola well diameter (rice)-(0.3～0.4)) ÷ (0.25～0.4) ± 0.03; On curved pipe and every straight tube 2～3 row's spurt holes (8) are arranged, the aperture of spurt hole is φ 12～20m/m.The adjacent spacing 50～180m/m of every round; The available old refractory brick of pad brick (7), the height of pad brick is selected for use by different requirements, generally at 0～150m/m; Specification φ (104～200) * (2～4) m/m of upright blast pipe (9) forms by 1～4.When using hot-blast baker, the material of downdraft pipeline preferably adopts the low-alloy seamless steel tube for boiler of permission working temperature 〉=550 ℃.The upper end of pipe has elbow, the curved pipe UNICOM of lower end and air-supply comb (6).
Two, the assembling of air-supply pipeline at the bottom of the State of Blast Furnace: before blast oven, weld according to assembling on following difference requirement and the furnace bottom of program in cupola well:
1. adopt hot-blast baker and igniting blow-on person more than 700 ℃.Air-supply comb (6) level of answering is installed, and the pad brick (7) that placement 60～80m/m is high below comb (6).The spurt hole (8) that makes comb is towards oblique positioned beneath.
2. can not be with hot-blast baker and firer more than 700 ℃.Air-supply comb (6) the pad brick (7) that only placement 130～150m/m is high below iron mouth one side.Cinder notch one side is placed directly on the bottom brick, makes the square obliquely device of spurt hole of comb.
3. the elbow with upright airduct (9) upper end stretches into 20～60m/m in the tuyere small sleeve, and (the elbow external diameter is littler by 1～3m/m) than air port internal diameter.End with the steel bar of two φ 4～5m/m is welded on the two-end-point of elbow internal diameter again.And the other end of steel bar covered (not shown) from being fixed on peep hole after the air port peep hole is drawn tension.Then again the lower end mouth of pipe of upright blast pipe (9) is connected with the blast inlet on the air-supply comb (6) and welded the location.The optimal number of upright blast pipe (9) is: 100～750m
3Blast furnace with 2～3.＞750m
3Blast furnace with 4.Near roughly equidistant 90 °～180 ° the garden of cinder notch that is distributed in, 2～4 air ports that supplies upright blast pipe air inducing is on week.
If with the outer airduct of stove pass the big cover of cinder notch to downdraft comb (6) supply with cold wind, then by shown in the figure two with stove outside airduct (10) stretch into cupola well (12) 20～160m/m through the big cover of cinder notch (11).Be inserted in bell and spigot (13) lining of the elbow of upright blast pipe (9).Using steel bar (14) to be enclosed within on the bell and spigot (13) then tightens.Again steel bar is pulled out the stove external fixation on the bolt (15) of the big cover of cinder notch.
Three, to the downdraft baker: when adding heat drying furnace with the hot blast jet flow, hot blast is introduced from the air port through upright blast pipe (9), be sprayed on to declivity through the spurt hole (8) of air-supply comb (6) on the upright brick wall on covering of the fan arc limit of about 240 ℃ of furnace bottom and cupola well bottoms, make these be difficult to rapidly baking zone well prior to other regional bakings with existing furnace technology.
Four, light a fire to downdraft:
1. during with the hot wind ignition blow-on, block the half air port earlier, sending temperature again is 200～250 ℃ hot blast, the full blast blow-on material of packing into.When being filled to the stockline of regulation, data such as the angle of rest (repose) of blowing-out mensuration charge level and collision zone.After the mensuration, send the coke before hot blast more than 700 ℃ is lighted furnace bottom and air port from the air port.(if do not need to measure the data of charge level and collision zone, when the blow-on material is filled to shaft top, can when continuing charging, send the hot blast more than 700 ℃).When treating the bright flame of iron mouth ejection, the temperature drop to 500 of keeping watch～550 ℃ are looked the working of a furnace again and are improved wind-warm syndrome gradually after the air-supply of furnace bottom comb up to stopping, and are 100～120 minutes to the Best Times of downdraft.
2. as if the hot wind ignition blow-on that does not have more than 700 ℃.Then with the stifled upward mud in each air port and after smashing tightly, disclose out an aperture again, the area of aperture is about about 50% of former air port area, then lights the coke of furnace bottom again with one of following method:
(1) attract cold wind (valve being housed at induced exhaust) from the cold wind house steward, airduct outside stove (10) is to downdraft comb (6) air-supply (also can be directly being sent＜200 ℃ cold wind to the downdraft comb by the air port).In order near the bearth brick lining the cooling air-supply comb, blow after 3～5 minutes, 20～100 kilograms kerosene or diesel oil are poured into air-supply comb (6) through the elbow of upright blast pipe (9) upper end, after shutting the oil port on the air-supply pipeline, again the butyraceous wood sawdust is added in the steel pipe of iron mouth, and burns the logical a spot of oxygen of red oxygen hose with front end.Oil-containing wood chip in the iron mouth steel pipe is blown in the stove, and the oil-containing coke at the bottom of the ignition furnace send 0.05kgf/cm to the downdraft comb subsequently
2Little wind, and put in the oxygen hose of red heat, strengthen amount of oxygen gradually, continue igniting combustion supporting, when the furnace bottom coke is orange, extract oxygen hose, strengthen the air output of furnace bottom comb gradually.
(2) borrow the injection of high pressure oxygen to suck geseous fuel such as acetylene gas with the oxygen hose that has injecting tube.After outside blast furnace, lighting, oxygen hose is stretched in the stove from iron mouth steel pipe.Light the coke of furnace bottom, the igniting of this method rapidly, but only in cupola well the water content of coke＞12% o'clock just be necessary.
(3) in the cupola well bottom of distance iron mouth steel pipe internal orifice 1/2 cupola well radius to the cinder notch, give the long electric stove wire of 400～800m/m of loading onto 2～16 parallel connections earlier, guide to outside the stove from iron mouth steel pipe and to be connected, switch on after the blow-on, utilize the high temperature dot burner bed coke charcoal of electric stove wire with the stove external power.
(4) if before dress blow-on material, bottom temperature is at 100～200 ℃, and do not need to survey the furnace throat charge level, then can be before dress blow-on material, earlier from the tuyere big sleeve 15～50 kilograms of oil-containing firewoods being added cupola well bottom centre to the air-supply comb (6) of cinder notch below, firewood is upwards conducted heat along with the heat of furnace bottom deep layer bricking and heat up, thereby in loading furnace process, ignite voluntarily.(as can not spontaneous combustion, the logical slightly oxygen of available red heat oxygen hose or with burning red drill rod) from the centerfire of iron mouth insertion cupola well.
3. increasing air quantity: the furnace bottom igniting sees from the iron mouth and can strengthen the air output of furnace bottom gradually when the furnace bottom coke has burnt glow after 3～5 minutes, treats the flame of iron mouth ejection bright clear when thorough (generally after igniting 15～20 minutes).Through the air port with 50～60% 25～36% the blast air-supplies of promptly pressing of full blast amount with full blast) hold concurrently to downdraft.Or standard-sized sheet cuts down door from the induced exhaust of cold wind house steward air inducing, to downdraft.
Five, cut off the processing of furnace bottom wind regime and iron mouth and cinder notch:
When the iron mouth and spray white bright little coke button, iron mouth flame is white bright dazzling, and when each air port is very bright, (greatly about back 100～120 minutes of furnace bottom igniting), elder generation's checking or damping down, the fastening steel bar that will connect the outer airduct of upright blast pipe (9) and stove again cuts off, with hammer drill the elbow of upright blast pipe is thrown into toward the stove center, till elbow breaks away from tuyere small sleeve or does not hinder good and sound little cinder notch, install then the air port spy on port lid or remove the outer airduct of stove after good and sound little cinder notch, continue winding-up iron mouth, see slag, can pull out the stifled iron mouth of going up of iron notch steel pipe until the iron mouth.Cinder notch blocks when then jetting to the white bright coke of continuous ejection.Behind the stifled iron notch 3～5 hours for the first time, beat tapping outlet and tap a blast furnace and slag tap, every about 2 hours, to make a breach once later on, the back winding-up iron mouth that at every turn taps a blast furnace blocked the iron mouth in 1～2 minute again, and open cinder notch immediately and jetted 2～5 minutes,
The method of six, drawing coal gas:
After stockline continue to descend, in throat temperature＜400 ℃, furnace top pressure＞0.03kgf/cm
2The time, toward the wet coke of 1～2 batch of water content＞18% of stove internal upper part adding.(if stockline is full, also available truck adds Ban Cheshui in stove).Draw coal gas by normal procedure immediately.(draw before the coal gas, keep temperature＞700 ℃ before the Combustion of Hot Air Furnace mouth) at this moment wants half-open coal gas flashboard cut down the coal gas amount that control enters hotblast stove.And the coal gas diffusion of opening slightly on fly-ash separator or the washing tower cuts down, wait the gas flame credit to decide glow after, add full coal gas amount more gradually, the complete shut-down coal gas diffusion cuts down.
Seven, strengthen air quantity, increase the weight of coke load, after the controlled chilling water yield and company go out the qualified molten iron of two stoves, similar to existing start-up of the furnace to the adjustment of the working of a furnace.But should note following some:
1. under the situation that furnace temperature allows, should add the full blast amount quickly than existing blow-on technology.Promptly after the first stove molten iron is qualified, take the circumstances into consideration to improve wind-warm syndrome and the corresponding air quantity that adds to about 70% of full blast amount; For the second time molten iron qualified after, look " cold and hot " trend of the lifting trend and the bits of two stove pig iron sulphur content, or improve wind-warm syndrome or add air quantity, and disclose the stifled mud part air port in, air quantity and wind-warm syndrome are disclosed the stifled mud in whole air ports after adding entirely.
2. owing to early draw coal gas, more existing blow-on technology has bigger wind-warm syndrome potentiality, so under the prerequisite that does not influence direct motion, should improve hot blast temperature comparatively fast, earlier.
3. after the first stove molten iron was qualified, apparent wind temperature potentiality size increased the weight of coke load more than 0.3, pressed the degree of iron, slag " thermotropism " later on, in time increased the weight of the coke load of follow-up material, prevented hot hanging or went out high silicon off-iron or casting iron.
4. before the blow-on, all hotblast stove will improve ball top temperature as far as possible, does not dry by the fire a hotblast stove less.
Main advantage of the present invention is as follows:
1. improve the stove quality of blast furnace, accelerate baker speed, it is good that the arc area of about 240 ° of cupola well bottoms can be dried by the fire earlier than other zones in the short time very fastly, obtains the unapproachable superior effect of existing roast technic.
2. guarantee that the cupola well bottom temp brings up to evenly, rapidly on the needed temperature of slag iron Channel Group, compare with the full coke open furnace method that the blow-on coke ratio can reduce by 10～40%; And can guarantee the outer iron that is not extra-large, and reached the normal daily output 90% or more by 10 days in (big blast furnace) without 5 days (small furnace) after oxygen burning iron mouth, the blow-on, guarantee that blow-on is rapid, smooth, easy, economical.
3. burn hot-blast stove than 3 hours at least in advance Zao coal gas that draws of existing process of the start-up, reclaim the high coal gas of calorific capacity more, reduce atmosphere pollution, accelerate to be transitioned into the speed of normal smelting.
4. simple and easy to do, the downdraft pipeline all can oneself be made in common ironworks and install, in the stove Operation is easily grasped, and close when stokehold workload and ordinary production, labour intensity alleviates greatly. Embodiments of the invention: on October 31st, 1 was to November 2. Mouping, province Yantai City, Shandong ironworks 17m3Blast furnace has adopted blow-on new technology of the present invention. Although current blow-on is maiden trial, (not spraying hot-blast baker to furnace bottom), in 13 hours, wind-warm syndrome only has 330～500 ℃ after the blow-on. And unplanned power failure also took place in the centre, but current new blow-on legal effect is still very remarkable, and main situation is as follows:
The full oven coke of blow-on than by this factory in the past 8.0 drop to 4.64, reduced by 42%. In 13 hours after igniting, the hot blast temperature only has 330～500 ℃, and wherein 730 are lower than 400 ℃. (wind-warm syndrome is many at 500～800 ℃ during normal blow-on) are in the situation that the heat income greatly reduces. First stove and the second stove iron all are qualified low silicon steel-refinings, LsL with ordinary productionsBe worth similarly, see following table for details:
In addition, to changing ordinary production over to, never burn the iron mouth from blow-on with oxygen.And the iron mouth is easy in 3 minutes with manually opening, consume manpower and ordinary production is close.The above-mentioned fact proves that fully this blow-on novel process can guarantee that the cupola well temperature of lower reaches on the required temperature of slag iron Channel Group rapidly, equably.
2. count during from the air port putting in blast, stop to add empty burnt in 24 hours in the follow-up material fully.Only add the regular burden(ing) that coke ratio is 867 kilograms of/ton iron; Rose in 32 hours, the coke load of follow-up material is exacerbated to about 80% of normal smelting, and smelts with the full blast amount.(this factory's annual combustion intensity is more than 2.6, and utilization coefficient is more than 5.0); When the coke load that played regular burden(ing) in 48 hours is added to ordinary production more than 90%.As mentioned above, if not power failure outside the plan, strengthening air quantity also can be faster with the transition speed that increases the weight of coke load, can shift to an earlier date about 6 hours more at least.
3. current blow-on is lacked than blow-on in the past and is used 18～28 coke charge charcoals.Use qualified coke 4-6 ton less, be worth 800～1200 yuan.Use fluorite less, manganese ore useless does not go out the casting iron that the scrap iron and the trade mark are higher than Z14, and the devices such as downdraft pipeline of test usefulness have only been spent less than 700 yuan entirely by this factory's self-control.With the saving of coke be worth offset after, also can save 100～500 yuan, add to go out scrap iron less, use fluorite less, approximately saved about 1000 yuan than former blow-on.Can give material, blast furnace is big more, and the effect of saving when adopting blow-on technology of the present invention is just big more.
4. simple and feasible, except that the manufacturing of the downdraft pipeline of new addition, install the simple and feasible, generally be worth the blast furnace section chief of 3～5 years classes, be easy to carry out start-up of the furnace according to technology point of the present invention in that once back on probation is independent.
5. at another 15m
3During blow-on, press preceding method and add two batches of drenched coke on the blast furnace, the effect of obtained safety, successfully early drawing coal gas.
Claims (10)
1, a kind of blast furnace process to downdraft comprises that baker, igniting, the adjustment working of a furnace draw main programs such as coal gas, it is characterized in that:
When 1. using hot-blast baker, adopt the jet flow type of heating, baking blast furnace hearth bottom.
2. before the air-supply igniting of air port or simultaneously, utilize downdraft pipeline in the stove to downdraft, igniting.
2, according to the described blast furnace process of claim 1., it is characterized in that described jet flow adds heat drying furnace and blow-on initial stage to downdraft, be to adorn a downdraft pipeline on the furnace bottom in cupola well earlier before the baker.
3,, it is characterized in that described downdraft pipeline is made up of downdraft comb (6) and upright blast pipe (9) according to the described blast furnace process of claim 2..
4,, it is characterized in that described downdraft comb (6) is made up of pipe and the some roughly close straight tubes of adjacent spacing of an arc or broken line according to the described blast furnace process of claim 3..
1. the radical of straight tube=(cupola well diameter (rice)-
（0.3～0.4）〕÷（0.25～0.4）±0.03。
2. on curved pipe and every straight tube, it is the spurt hole of φ 12～20m/m of 50～180m/m that 2～3 row's adjacent holes spacings are all arranged.
5, according to the described blast furnace process of claim 3., it is characterized in that there is an elbow upper end of described upright blast pipe (9), UNICOM is managed with the arc (or broken line) of air-supply comb (6) in the lower end.The optimal number of upright blast pipe is: 100～750m
3Blast furnace is with 2～3,＞750m
3Blast furnace with 4.These upright blast pipes should roughly be distributed near all scopes in 90～120 ° garden of two cinder notch equidistantly.
6, according to the described blast furnace process of claim 2., it is characterized in that it is that hot blast is introduced from the air port through upright blast pipe (9) that described jet flow adds heat drying furnace, be sprayed on the furnace bottom to declivity from the spurt hole (8) of air-supply comb (6), side is sprayed on the upright brick wall on covering of the fan arc limit, cupola well bottom.
7,, it is characterized in that described to downdraft, igniting according to the described blast furnace process of claim 2..If the schedule of operation during with hot blast is:
1. after having adorned the blow-on material when installing to shaft top (or blow-on material), send into the hot blast more than 700 ℃ from the air port.
2. the flame that sprays at the iron mouth becomes when becoming clear, and wind-warm syndrome is dropped to 500～550 ℃.
3. the Best Times to downdraft is 100～120 minutes.
8, according to the described blast furnace process of claim 2., it is characterized in that described to downdraft, igniting, if the schedule of operation during without hot blast is:
1. send into cold wind from the cold wind house steward to downdraft comb (6), or send into＜200 ℃ cold wind to downdraft comb (6) by the air port.After 3～5 minutes, pour kerosene or diesel oil into, shut the oil port on the blast tube, again the oil-containing wood sawdust is added in the steel pipe of iron mouth through the elbow of upright blast pipe (9) upper end.Burn the logical oxygen of red oxygen hose with front end, the oil-containing wood chip is blown in the stove, send 0.05～0.10kgf/cm to downdraft comb (6) subsequently
2Little wind, and light the furnace bottom coke with the oxygen hose of red heat, strengthen amount of oxygen again.When the furnace bottom coke is orange, extract oxygen hose, and strengthen the air output of downdraft comb (6) gradually.
2. when the water content of furnace bottom coke＞12%, a kind of in available following two kinds of methods:
A) inhale the telescopic oxygen hose with having to penetrate.Spray geseous fuel such as sucking acetylene, after lighting oxygen hose is stretched into cupola well from iron mouth steel pipe and light the furnace bottom coke.
B) before the baker, after installing the downdraft comb.On the furnace bottom of cupola well center to the cinder notch, press 2～16 electric stove wires in parallel, draw outside the stove, during blow-on electric stove wire connected electric point burner bed coke charcoal from iron mouth steel pipe.
3. before adorning the blow-on material,, and do not need to survey the furnace throat charge level if bottom temperature is at 100～200 ℃.During collision zone, can be from the furnace bottom sector region of cupola well bottom centre to the cinder notch below of in the tuyere big sleeve oil-containing firewood being packed into, if adorned the blow-on material, the furnace bottom coke is not spontaneous combustion as yet.The oxygen hose of available red heat leads to minor amounts of oxygen, stretches into furnace bottom ignite firewood and furnace bottom coke from iron mouth steel pipe.
9,, it is characterized in that the described coal gas method of drawing is after stockline continue to descend, furnace top gas temperature＜400 ℃, stock gas pressure＞0.03kgf/cm according to the described blast furnace process of claim 1.
2During with temperature＞700 in the Combustion of Hot Air Furnace mouth ℃, add the wet coke of 1～2 batch of water content＞18% earlier to furnace throat, also available truck or batch can add half car (jar) water, then draw coal gas by the normal running program.
10, according to the described blast furnace process of claim 1., it is characterized in that the described adjustment working of a furnace is the degree according to slag iron " thermotropism ", the size of wind-warm syndrome potentiality, permeability of stock column exponential sum blanking situation, more existing blow-on technology adds the full blast amount quickly, in time increases the weight of coke load with the full blast gentleness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86103119A CN86103119B (en) | 1986-04-28 | 1986-04-28 | Blast furnace blowing process and its appts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86103119A CN86103119B (en) | 1986-04-28 | 1986-04-28 | Blast furnace blowing process and its appts |
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| CN86103119A true CN86103119A (en) | 1987-09-30 |
| CN86103119B CN86103119B (en) | 1987-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN86103119A Expired CN86103119B (en) | 1986-04-28 | 1986-04-28 | Blast furnace blowing process and its appts |
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| CN102899430A (en) * | 2012-09-19 | 2013-01-30 | 攀钢集团攀枝花钢钒有限公司 | Multipoint stereoscopic ignition device and method for blast furnace blow-in and blast furnace containing the device |
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-
1986
- 1986-04-28 CN CN86103119A patent/CN86103119B/en not_active Expired
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899430A (en) * | 2012-09-19 | 2013-01-30 | 攀钢集团攀枝花钢钒有限公司 | Multipoint stereoscopic ignition device and method for blast furnace blow-in and blast furnace containing the device |
| CN102899430B (en) * | 2012-09-19 | 2014-12-17 | 攀钢集团攀枝花钢钒有限公司 | Multipoint stereoscopic ignition device and method for blast furnace blow-in and blast furnace containing the device |
| CN104894391A (en) * | 2015-06-10 | 2015-09-09 | 赤峰富邦铜业有限责任公司 | Cold metal blowing-in operation method of oxygen-enriched side-blown bath copper smelting process |
| CN104894391B (en) * | 2015-06-10 | 2017-02-08 | 赤峰富邦铜业有限责任公司 | Cold metal blowing-in operation method of oxygen-enriched side-blown bath copper smelting process |
| CN104878142A (en) * | 2015-06-17 | 2015-09-02 | 山西太钢不锈钢股份有限公司 | Method for determining whether to increase blast volume or not during recovery of furnace conditions of blast furnace |
| CN104928427A (en) * | 2015-07-01 | 2015-09-23 | 宝钢集团新疆八一钢铁有限公司 | Blast furnace drying air guide pipe device |
| CN104928427B (en) * | 2015-07-01 | 2023-07-04 | 新疆八一钢铁股份有限公司 | Blast furnace baking air guide pipe device |
| CN115261532A (en) * | 2022-07-26 | 2022-11-01 | 广西钢铁集团有限公司 | Method for building initial airflow of large-scale blast furnace |
| CN115261532B (en) * | 2022-07-26 | 2024-01-02 | 广西钢铁集团有限公司 | Method for constructing initial airflow of large blast furnace |
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