CN102618678A - Blast furnace slag-iron separation device, slag-iron separation method and discharged blast furnace slag-iron recovery method - Google Patents
Blast furnace slag-iron separation device, slag-iron separation method and discharged blast furnace slag-iron recovery method Download PDFInfo
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Abstract
The invention discloses a blast furnace slag-iron separation device, a slag-iron separation method and a discharged blast furnace slag-iron recovery method. The blast furnace slag-iron separation device comprises a slag-iron runner, a molten iron runner and a slag runner, wherein the slag-iron runner is connected with a tap hole of a blast furnace, the molten iron runner with a skimmer is used for connecting the slag-iron runner and an iron container, and the slag runner is used for connecting the slag-iron runner and the slag container. The separation device further comprises an iron settling tank, a small tap hole, a molten iron lateral runner and a stopper. The slag-iron separation method employs the blast furnace slag-iron separation device to separate effluent from the tap hole of the blast furnace so as to obtain slag and molten iron while the blast furnace skimmer is disabled. The discharged blast furnace slag-iron recovery method employs the blast furnace slag-iron separation device to recover the molten iron in the slag with rich iron.
Description
Technical field
The present invention relates to blast furnace slag iron separating step in the blast furnace production process, more particularly, relate to a kind of blast furnace slag iron tripping device, slag iron separation method and tap cinder iron recovery method.
Background technology
Molten iron and slag are the main productss that blast furnace is produced.In the blast furnace casting process, slag iron (that is, slag and molten iron) is discharged from iron notch simultaneously.The stokehold skimmer is the device that is used for separating slag iron, and can it works better, has determined directly whether blast furnace production can continue to carry out.In blast furnace opening for example, special furnace condition recovery periods such as (blast furnace thermojunctions etc.); Because mobile bad, the inferior separating effect of slag iron mixing liquid; Directly adopt skimmer to separate slag and molten iron; Might cause passageway, skimmer below eye to stick with paste dead, the stokehold condition of tapping a blast furnace and interrupt, even the compelled damping down of blast furnace.
To this situation, existing treatment process is to make slag, molten iron without skimmer, directly flows into storage slag container or gets into flush slag technology through the slag ditch.But storage slag container material is generally irony, if the more slag of band iron flows into storage slag container, then very easily causes storage slag container to burn, even burns out storage slag container traffic road.In addition, if slag through the flush slag art breading, then because its iron-holder is high, is prone to blast behind the chance water, aggravated potential safety hazard.If not separated slag iron is directly worked as slag treatment, then will cause the blast furnace iron loss to increase, financial loss is serious.
In addition, in the blast furnace normal productive process, (smelt like schreyerite owing to smelt mineral; Slag iron inferior separating effect) or the crude fuel condition (poor like coke quality, furnace temperature level control higher, slag iron viscosity is big; Inferior separating effect) restriction may cause short-term or secular slag iron inferior separating effect, still contains with a large amount of molten iron through the slag (promptly descending slag) behind the skimmer; This partial molten iron can cause financial loss and potential safety hazard too if directly get into slag ladle or grain slag technology.
In sum, need badly and a kind ofly do not possessing under the operating mode of using skimmer device and the corresponding method that still can separate slag and molten iron and continuous tapping as requested; And possess under the operating mode of using skimmer, can further improve the device and the correlation method of metal recovery rate.
Summary of the invention
One side of the present invention provides a kind of blast furnace slag iron tripping device; Said blast furnace slag iron tripping device optionally uses skimmer or landfill protection skimmer; Simultaneously, also can be according to the rhythm demand of tapping a blast furnace of stokehold, flexible; When tapping a blast furnace again behind realization continuous tapping and the long-time interval, all can satisfy the molten iron logistics demand.Another aspect of the present invention provides a kind of blast furnace slag iron separation method, and said blast furnace slag iron separation method adopts above-mentioned blast furnace slag iron tripping device, can realize the protection to skimmer, and realizes high efficiency separation.One side more of the present invention provides a kind of tap cinder iron recovery method, and said tap cinder iron recovery method adopts above-mentioned blast furnace slag iron tripping device, can reduce the band iron amount of slag down, reduces iron loss, and realizes the continuous high-efficient operation.
According to blast furnace slag iron tripping device of the present invention; It comprises slag iron runner, connection slag iron runner and the storage iron container that connects blast furnace iron notch and is provided with the trough of skimmer, the slag ditch that is connected the slag iron runner and stores up the slag container; Said tripping device also comprises heavy Tie Chi, little iron notch, lateral channel and block piece; Wherein, said heavy iron pond is arranged on the Upstream section of slag ditch, and said heavy iron pond is deeper than and is wider than said slag ditch; Said little iron notch is opened in the side bottom in heavy iron pond; One end of said lateral channel is communicated with said little iron notch; The other end of said lateral channel is communicated with trough in the skimmer downstream or the other end of said lateral channel directly is communicated with storage iron container, and said lateral channel has the molten iron of being convenient to mobile obliquity; Said block piece is removably disposed within the skimmer and before.
According to blast furnace slag iron tripping device of the present invention, said block piece is banked up by exsiccant refractory materials powder and is formed.
According to blast furnace slag iron tripping device of the present invention, said little iron notch can design vertically upward a short vertical section as required, and said short vertical section is communicated with said heavy iron pond and lateral channel; Also can cancel vertical section as required, little iron notch bottom directly is communicated with lateral channel.
According to a further aspect in the invention, a kind of blast furnace slag iron separation method is provided, said blast furnace slag iron separation method adopts aforementioned blast furnace slag iron tripping device, under the situation of not using skimmer, separates the slag iron of discharging from blast furnace iron notch, obtains slag and molten iron.
According to blast furnace slag iron separation method of the present invention; Said separation method comprises the steps: to use skimmer to carry out under the situation of normal skimming operation not possessing; With block piece fill up before the skimmer with within; And heap is high before skimmer, flows into skimmer to stop elute, and makes said elute can all flow into the slag ditch; The little iron notch of shutoff; Open blast furnace iron notch to discharge elute, after elute flowed into the slag iron runner from blast furnace iron notch, molten iron flowed into trough through skimmer; Following slag flows into the slag ditch; Molten iron height in heavy iron pond is higher than under the situation of height of said little iron notch; Open little iron notch; So that the molten iron of below, heavy iron pond flows into storage iron container through little iron notch, lateral channel in proper order or order flows into storage iron container through little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along the slag ditch; The back shutoff blast furnace iron notch that finishes that taps a blast furnace is cleaned out slag and molten iron in said little iron notch and the heavy iron pond.
According to blast furnace slag iron separation method of the present invention, require very in short-term the pitch time of tapping a blast furnace for twice when front and back, preferably uses little iron notch to comprise the blast furnace slag iron tripping device of short vertical section.After then having gone out iron, said short vertical section and heavy iron pond will be filled by molten iron at every turn, and device need not to do any processing and holding time not, is convenient to opening at any time of iron mouth next time, beat tapping outlet after, but the molten iron natural subsidence to heavy iron pond, little iron notch smoothly circulates; Require the pitch time of tapping a blast furnace for twice when front and back when longer, the design of above-mentioned short vertical section causes the sedimentary molten steel solidification of little iron notch and heavy iron pond easily, separates device when causing tapping a blast furnace once more and can't use.At this moment; Can cancel short vertical section as required; The little iron notch bottom of blast furnace slag iron tripping device directly is communicated with lateral channel, gone out iron after, slag iron all flows out in little iron notch and the heavy iron pond; Utilize the pitch time tap a blast furnace again, tapping a blast furnace before next time with little iron notch with heavy iron pond is cleaned out and stifledly again get well little iron notch and tap a blast furnace next time.
According to a third aspect of the invention we; A kind of tap cinder iron recovery method is provided; Said tap cinder iron recovery method adopts above-mentioned blast furnace slag iron tripping device; Removal be arranged on before the skimmer with within block piece so that skimmer can carry out normal skimming operation, reclaim the molten iron from the following slag that skimmer is discharged, obtain iron level still less slag and increase molten iron output.
According to tap cinder iron recovery method of the present invention, said tap cinder iron recovery method comprise the steps: removal be arranged on before the skimmer with within block piece so that skimmer can carry out normal skimming operation, and the little iron notch of shutoff; Open blast furnace iron notch to discharge elute; Following slag flows into the slag ditch; Molten iron height in heavy iron pond is higher than under the situation of height of said little iron notch; Open little iron notch; So that the molten iron of below, heavy iron pond flows into storage iron container through little iron notch, lateral channel in proper order or order flows into storage iron container through little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along the slag ditch.
The back shutoff blast furnace iron notch that finishes that taps a blast furnace is cleaned out slag and molten iron in said little iron notch and the heavy iron pond.Molten iron height in heavy iron pond is higher than under the situation of height of said little iron notch; Open little iron notch; So that the molten iron of below, heavy iron pond flows into storage iron container through little iron notch, lateral channel in proper order or order flows into storage iron container through little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along the slag ditch.
According to tap cinder iron recovery method of the present invention, require very in short-term when the pitch time of tapping a blast furnace, preferably use little iron notch to comprise the blast furnace slag iron tripping device of short vertical section; After having gone out iron, short vertical section and heavy iron pond will be filled by molten iron at every turn, and device need not to do any processing and holding time not; This is convenient to opening at any time of iron mouth next time; After beating tapping outlet, but the extremely heavy iron pond of molten iron natural subsidence, and little iron notch smoothly circulates; When the pitch time of tapping a blast furnace, requirement was longer, short vertical section caused the sedimentary molten steel solidification of little iron notch and heavy iron pond easily, separated device when causing tapping a blast furnace once more and can't use.At this moment; Can cancel short vertical section as required; Little iron notch bottom directly is communicated with lateral channel, treated out iron after, the slag iron in little iron notch and the heavy iron pond all flows out; Utilize again and tap a blast furnace pitch time, tapping a blast furnace before next time with little iron notch with heavy iron pond is cleaned out and stifledly again get well little iron notch to tap a blast furnace next time.
Compared with prior art; Blast furnace slag iron tripping device of the present invention and separation method have the advantage of mobility strong; Relative unit making method, size have flexibility and changeability property, select suitable tripping device and method through judging actual condition, thereby realize the continuous ordinary production of blast furnace; The molten iron of separating finally gets into storage iron container, becomes qualified iron product; The operation of blocking up before the short vertical section that is connected with little iron notch can be avoided tapping a blast furnace has at every turn reduced labour intensity and has shortened the pitch time of tapping a blast furnace, and has effectively improved the recovery and the capacity factor of a blast furnace of iron.In addition, tap cinder iron recovery method of the present invention can reduce slag band iron amount down, reduces iron loss, and realizes the continuous high-efficient operation.
Description of drawings
Figure 1A is the schematic top plan view of prior art blast furnace slag iron tripping device.
Figure 1B is that the master of prior art blast furnace slag iron tripping device looks cross-sectional schematic.
Fig. 2 A is the schematic top plan view of the blast furnace slag iron tripping device of exemplary embodiment of the present.
Fig. 2 B is the sectional view along the intercepting of A-A line of the blast furnace slag iron tripping device among Fig. 2 A.
Fig. 3 A is first kind of structural representation of the heavy Tie Chi of blast furnace slag iron tripping device of the present invention, little iron notch and lateral channel.
Fig. 3 B is the another kind of structural representation of the heavy Tie Chi of blast furnace slag iron tripping device of the present invention, little iron notch and lateral channel.
Main description of reference numerals:
1-blast furnace iron notch, 2-slag iron runner, 3-trough, 4-skimmer, 5-storage iron container, 6-slag ditch, 7-storage slag container, the heavy iron pond of 8-, the little iron notch of 9-, 10-lateral channel, the short vertical section of 11-, 12-block piece.
Embodiment
To describe exemplary embodiment of the present invention in detail with reference to accompanying drawing now, so that those skilled in the art in the invention's exemplary embodiment of embodiment of the present invention easily.
Figure 1A is the schematic top plan view of prior art blast furnace slag iron tripping device, and Figure 1B is that the master of prior art blast furnace slag iron tripping device looks cross-sectional schematic.Shown in Figure 1A; Blast furnace slag iron tripping device of the prior art comprises slag iron runner 2, trough 3 and slag ditch 6; After slag and molten iron flow out from blast furnace iron notch 1, by skimmer 4 it is separated, isolated molten iron flows into storage iron containers through trough 3; Isolated slag then flows into storage slag container through slag ditch 6, separates thereby accomplish slag iron.But if use this tripping device to separate under the situation that the blast furnace skimmer can not normally use, slag iron thickness or slag band iron are more, then can bring a lot of detrimentally affects, even block the continuous production of blast furnace tripping device and separating prod.Thus, the present invention is directed to this technical problem existing blast furnace slag iron tripping device is improved, the concrete structure of blast furnace slag iron tripping device exemplary embodiment of the present invention is referring to accompanying drawing 2A and 2B.
Fig. 2 A is the schematic top plan view of the blast furnace slag iron tripping device of exemplary embodiment of the present, and Fig. 2 B is the sectional view along the intercepting of A-A line of the blast furnace slag iron tripping device among Fig. 2 A.Blast furnace slag iron tripping device according to an exemplary embodiment of the present invention; It comprises slag iron runner 2, connection slag iron runner 2 and the storage iron container 5 that connects blast furnace iron notch 1 and is provided with the trough 3 of skimmer 4, the slag ditch 6 that is connected slag iron runner 2 and stores up slag container 7, also comprises heavy iron pond 8, little iron notch 9, lateral channel 10 and block piece 12.Wherein, Heavy iron pond 8 is arranged on the Upstream section of slag ditch 6; Little iron notch 9 is opened in the side bottom in heavy iron pond 8; One end of lateral channel 10 is communicated with little iron notch 9, and the other end of lateral channel 10 is communicated with trough 3 or the other end of lateral channel 10 directly is communicated with storage iron container 5, block piece 12 be removably disposed in skimmer 4 before and within.
Because the proportion of molten iron is greater than slag; After the elute (being designated hereinafter simply as elute) of therefore when blast furnace casting, discharging from iron notch flowed into heavy iron pond 8, molten iron can be deposited on 8 bottoms, iron pond and store up iron containers 5 through little iron notch 9, lateral channel 10, trough 3 inflows.And after the centrifugation of slag through heavy iron pond 8 because it is light than iron, slag can float on heavy 8 tops, iron pond and flow into storage slag containers 7 or form grain slag through slag ditch 6 through flush slag technology after send into storage slag container 7.
Wherein, heavy iron pond 8 should be deeper than and be wider than slag ditch 6, and guaranteeing that elute has one and circles round when flowing to here, its shape can be a conventional shape such as circular, square.During practical implementation, can existing slag ditch 6 be dug the wide heavy iron pond 8 of dark formation of digging, preferably, the surface in heavy iron pond 8 forms and has spread one deck yellow ground with the refractory materials compacting, with antiseized ditch.The formation of little iron notch 9 can guarantee under the unimpeded condition; Side bottom in heavy iron pond 8 excavate or buried pipeline to form the passage that taps a blast furnace of heavy iron pond 8 of this connections and lateral channel 10; Its shape also can be a conventional shape such as circular, square, and the structure of heavy iron pond 8 and little iron notch 9 can be specifically referring to accompanying drawing 2B.Lateral channel 10 is used for sedimentary molten iron is introduced trough 3, and promptly lateral channel 10 need have the molten iron of being convenient to mobile obliquity, and this obliquity is as long as guarantee that molten iron can successfully flow into trough 3 naturally.Lateral channel 10 can be to dig to establish temporarily, and the time spent can directly not fill and lead up, and its surface needs to suppress reality with iron runner material.Block piece 12 is in order to make when not using skimmer 4, to let elute can flow into slag ditch 6 fully, and prevents that skimmer 4 from being stopped up by elute.Block piece 12 is banked up by exsiccant refractory materials powder and is formed, and is convenient to be shaped apace or dismantle.
In the present invention, two kinds of structural representations of heavy iron pond 8, little iron notch 9 and lateral channel 10 have been provided.Fig. 3 A is first kind of structural representation of the heavy Tie Chi of blast furnace slag iron tripping device of the present invention, little iron notch and lateral channel, and Fig. 3 B is the another kind of structural representation of the heavy Tie Chi of blast furnace slag iron tripping device of the present invention, little iron notch and lateral channel.
Shown in Fig. 3 A, first kind is comparatively common structure design, and promptly heavy iron pond 8 directly is connected with lateral channel 10 through little iron notch 9.Use the tripping device of this structure to need after each sepn process finishes, remaining molten iron and slag in the heavy iron pond 8 of cleaning in time and the little iron notch 9, the good little iron notch 9 of shutoff then, in order under subnormal use.The advantage of this design is: simple in structure, dimensionally stable is anti-to be washed away, and it is empty to have gone out behind the iron heavy Tie Chi, little iron notch and lateral channel passage spontaneous current, can not result in blockage; Shortcoming is: need clean out the slag iron of little iron notch front and back and block up good little iron notch again after having gone out iron at every turn, need about 20 minutes consuming time.
Shown in Fig. 3 B; In second kind of structure design; Little iron notch 9 also comprises short vertical section 11 vertically upward; Short vertical section 11 is communicated with heavy iron pond 8 and lateral channel 10, and the height at A place, upper edge, short vertical section 11 outside of requirement and C place, heavy Tie Chi upper edge are with high dimensionally, and the height at B place, lower edge, short vertical section inboard is lower than the height at A place, upper edge, the short vertical section outside.When using this structure; Behind the flash liberation end of processing, heavy iron pond 8 is filled by liquid molten iron with little iron notch 9, forms communicating vessels; Need not to clear up the slag iron runner when tapping a blast furnace next time; Molten iron with automatic sedimentation, and flows into lateral channels 10 through little iron notch 9, short vertical section 11 in heavy iron pond 8, realize continuously at a distance from continuous tapping.This structural disadvantages is: when twice interval of tapping a blast furnace is longer,, solidifies easily because of this place's molten iron deposition is few, and the short at interval operating mode so this structure preferentially is used to tap a blast furnace, or be equipped with effective insulation measure.
Blast furnace slag iron tripping device is introduced blast furnace slag iron separation method of the present invention and following slag iron recovery method in detail according to an exemplary embodiment of the present invention below.When using blast furnace slag iron tripping device of the present invention to carry out separation of blast furnace slag iron and the recovery of following slag iron, need select different apparatus and method according to different working conditions.
Wherein, Possess the situation of using skimmer to carry out normal skimming operation and do not possess the situation of using skimmer to carry out normal skimming operation, it is easy to be definite according to the state (for example viscosity, flowability) of operation stage (for example blow-on initial stage, the special working of a furnace, mineral) and elute etc. to be those skilled in the art.Tapping a blast furnace specifically refers to the timed interval of tapping a blast furnace in front and back pitch time, and whether the anxiety of the pitch time of tapping a blast furnace, also is that those skilled in the art confirm easily.
Blast furnace slag iron separation method of the present invention is to use skimmer 4 to carry out under the situation of normal skimming operation not possessing; At first with block piece 12 be arranged on before the skimmer 4 with within to stop elute to flow into skimmer 4; And make elute can all flow into slag ditch 6, and the little iron notch 9 of shutoff.Then, open blast furnace iron notch 1 to discharge elute.
First kind of situation: in the time of tapping a blast furnace is not under the situation of very anxiety; Blast furnace slag iron tripping device is preferentially selected the project organization of Fig. 3 A; After treating that elute flows into slag iron runner 2 from blast furnace iron notch 1, the situation of observing elute, the molten iron height in heavy iron pond 8 is higher than under the situation of height of little iron notch 9; Open little iron notch 9; Flow into storage iron containers 5 so that the molten iron of heavy 8 belows, iron pond flows into storage iron containers 5 or order through little iron notch 9, lateral channel 10 in proper order through little iron notch 9, lateral channel 10 and trough 3, the slag of heavy 8 tops, iron pond flows into storage slag containers 7 along slag ditch 6, the separation of realization blast furnace casting process slag iron.After this taps a blast furnace and finishes,, need the residual slag iron in little iron notch 9 and heavy iron pond 8 is cleaned out in order to guarantee the normal separation of next slag iron, and the little iron notch 9 of shutoff again.
Second kind of situation: get much time under the situation of opening tapping a blast furnace; Blast furnace slag iron tripping device is preferentially selected the project organization of Fig. 3 B; After treating that elute flows into slag iron runner 2 from blast furnace iron notch 1, the situation of observing elute, the molten iron height in heavy iron pond 8 is higher than under the situation of height of little iron notch 9; Open little iron notch 9; Flow into storage iron containers 5 so that the molten iron of heavy 8 belows, iron pond flows into storage iron containers 5 or order through little iron notch 9, lateral channel 10 in proper order through little iron notch 9, lateral channel 10 and trough 3, the slag of heavy 8 tops, iron pond flows into storage slag containers 7 along slag ditch 6, the separation of realization blast furnace casting process slag iron.After this tapped a blast furnace and finishes, whole heavy iron pond 8, little iron notch 9, short vertical section 11 had all been sealed up by the high-temperature liquid state molten iron, and molten iron wherein can not solidify at short notice.Therefore; Under the pitch time of tapping a blast furnace very short situation, need not to do any processing or take necessarily to be incubated measure, can continuous tapping; After treating that blast furnace iron notch 1 is opened next time; Slag directly flows through from slag ditch 6, flows into lateral channel 10 through little iron notch 9 and short vertical section 11 after the molten iron sedimentation, realizes working continuously.
Tap cinder iron recovery method of the present invention is to use skimmer to carry out under the situation of normal skimming operation possessing, and removal block piece 12 is so that skimmer 4 can carry out normal skimming operation, and the little iron notch 9 of shutoff.Wherein, following slag promptly refers to handle the slag under the backstop via the skimmer skimming, wherein possibly contain a spot of molten iron.
Then, open blast furnace iron notch 1 to discharge elute.
First kind of situation: under the little situation of iron-holder, blast furnace slag iron tripping device is preferentially selected the project organization of Fig. 3 A in the following slag.After treating that elute flows into slag iron runner 2 from blast furnace iron notch 1; Molten iron flows into trough 3 through skimmer 4; Following slag flows into slag ditch 6; Observe the situation of slag down, the molten iron height in heavy iron pond 8 is higher than under the situation of height of little iron notch 9, opens little iron notch 9 so that the molten iron of heavy 8 belows, iron pond flows into storage iron containers 5 or order through little iron notch 9, lateral channel 10 in proper order and stores up iron containers 5 through little iron notch 9, lateral channel 10 and trough 3 inflows; The slag of heavy 8 tops, iron pond flows into storage slag container 7 along slag ditch 6, realizes that slag iron reclaims under the blast furnace casting process.After this taps a blast furnace and finishes,, need little iron notch 9 and the residual slag iron in the heavy iron pond 8 are cleaned out for guaranteeing the normal separation of next slag iron, and the little iron notch 9 of shutoff again.
Second kind of situation: under the bigger situation of following slag iron-holder, blast furnace slag iron tripping device is preferentially selected the project organization of Fig. 3 B.After treating that elute flows into slag iron runner 2 from blast furnace iron notch 1; Molten iron flows into trough 3 through skimmer 4; Following slag flows into slag ditch 6; Observe the situation of slag down, the molten iron height in heavy iron pond 8 is higher than under the situation of height of little iron notch 9, opens little iron notch 9 so that the molten iron of heavy 8 belows, iron pond flows into storage iron containers 5 or order through little iron notch 9, lateral channel 10 in proper order and stores up iron containers 5 through little iron notch 9, lateral channel 10 and trough 3 inflows; The slag of heavy 8 tops, iron pond flows into storage slag container 7 along slag ditch 6, realizes that slag iron reclaims under the blast furnace casting process.After this technology of tapping a blast furnace, whole heavy iron pond 8, little iron notch 9, short vertical section 11 have all been sealed up by the high-temperature liquid state molten iron, and molten iron wherein can not solidify at short notice.Therefore, under the pitch time of tapping a blast furnace very short situation, need not to do any processing or take necessarily to be incubated measure, can realize continuous tapping.After treating that blast furnace iron notch 1 is opened next time, slag directly flows through from slag ditch 6, flows into lateral channels 10 through little iron notch 9, short vertical section 11 after the molten iron sedimentation, has realized working continuously.
Also promptly, when blast furnace did not possess the condition of using skimmer to separate slag iron, blast furnace slag iron tripping device of the present invention just played and substitutes the purpose that skimmer separates slag iron.When blast furnace possesses the condition of using skimmer to separate slag iron, can as if slag iron inferior separating effect, then can keep heavy iron pond 8, little iron notch 9 and lateral channel 10 and continue according to the difference of smelting mineral as slag iron retrieving arrangement use down; If slag iron separating effect is better, can iron pond 8 fill into that the width degree of depth with slag ditch 6 is consistent with sinking, the little iron notch of shutoff 9, fill and lead up lateral channel 10, only use skimmer 4 to carry out the separation of slag, molten iron.
Below in conjunction with specific embodiment blast furnace slag iron tripping device of the present invention, blast furnace slag iron separation method and tap cinder iron recovery method are described.
According to the structure shown in the accompanying drawing 3B, adopt the method for cast-in-site to make the structural part of heavy iron pond 8, little iron notch 9, short vertical section 11 and lateral channel 10 at the slag ditch.Put the furnace in blast after the igniting, because furnace temperature is higher, the flowability of molten iron, slag is poor, in order to prevent that elute from flowing into skimmer 4 and causing skimmer 4 to stick with paste dead and influence the normal separation of stokehold slag iron, before separation with yellow sand skimmer 4 before and within form block piece.
Carry out tapping a blast furnace for the first time behind the blast furnace opening.Before opening blast furnace iron notch 1 for the first time, the little iron notch 9 of shutoff.After treating that blast furnace iron notch 1 is opened, elute directly flows into slag ditch 6 from slag iron runner 2, goes out 10 tons of the quantity of slag, does not see iron.Therefore, need not to disclose out little iron notch 9, also need not tripping device is cleared up, can continue to tap a blast furnace.
Carrying out blast furnace taps a blast furnace for the second time.Opening for the second time blast furnace iron notch 1; After about 30 minutes; Occur molten iron in the elute, be in charge of with four rapidly and disclose out little iron notch 9, elute flows in the heavy iron pond 8 and separates; Molten iron flows into trough 3 backs through little iron notch 9, lateral channel 10 and gets into storage iron containers, goes out 30 tons of the quantity of slag, 10 tons of the amounts of tapping a blast furnace.Tap a blast furnace the later stage, range estimation judges that the flowability of molten iron, slag is poor, does not possess the condition of recovering skimmer 4.After this taps a blast furnace and finishes, heavy iron pond 8, little iron notch 9 and short vertical section 11 are left intact, only on the slag iron liquid level that exposes, spread one deck heat preserving agent.
After 30 minutes, blast furnace goes out iron for the third time, after blast furnace iron notch 1 is opened, after about 15 minutes, occurs molten iron in the elute, but because blow-on initial stage slag iron thickness, causes little iron notch 9 to form with short vertical section 11 slag iron and partly solidify, and fails the nature circulation.At this moment, with the irony tubule feed minor amounts of oxygen, insert heavy iron pond 8 and short vertical section after 11,2 minutes little iron notch 9 burnt out, molten iron flows into trough 3 backs through little iron notch 9, lateral channel 10 and gets into and store up the iron containers, goes out 40 tons of the quantity of slag, 25 tons of the amounts of tapping a blast furnace.Tap a blast furnace the later stage, range estimation judges that the flowability of molten iron, slag is poor, does not possess the condition of recovering skimmer 4.After this taps a blast furnace and finishes, heavy iron pond 8, little iron notch 9 and short vertical section 11 are left intact, only on the slag iron liquid level that exposes, spread one deck heat preserving agent, and be used in device 8,9,11 tops and set up the gas fire insulation.
After 20 minutes, blast furnace goes out iron the 4th time, after blast furnace iron notch 1 is opened; After about 5 minutes, occur molten iron in the elute, little iron notch 9 circulates with short vertical section 11 naturally; Molten iron flows into trough 3 backs through little iron notch 9, lateral channel 10 and gets into storage iron containers, goes out 60 tons of the quantity of slag, 50 tons of the amounts of tapping a blast furnace, and the mobile of molten iron, slag obviously improves; For the sake of assurance, wouldn't recover skimmer 4.After this taps a blast furnace and finishes, heavy iron pond 8, little iron notch 9 and short vertical section 11 are left intact, only on the slag iron liquid level that exposes, spread one deck heat preserving agent.
When blast furnace goes out the 5th iron, after blast furnace iron notch 1 is opened, in about about the 1 minute elute molten iron appears; Molten iron flows into trough 3 backs through little iron notch 9, lateral channel 10 and gets into storage iron containers, goes out 40 tons of the quantity of slag, 60 tons of the amounts of tapping a blast furnace, molten iron, slag better mobile; Possesses the condition of normally tapping a blast furnace of using skimmer 4; With before the skimmer 4 with within yellow sand dig, and skimmer 4 usefulness gas fires are dried, all the other do not do change.
After 30 minutes, preparation work is accomplished, and blast furnace goes out iron the 6th time.After blast furnace iron notch 1 was opened, elute was iron basically entirely, and molten iron directly flows into trough 3 through skimmer 4, flow to storage iron container again.After tapping a blast furnace 15 minutes; Begin to contain slag in the elute, after the skimmer skimming is handled, have following slag to flow in the slag ditch 6; Remaining molten iron flows in the trough 3 and flows through the molten iron that comes from skimmer 4 through little iron notch 9 and lateral channel 10 and gets into storage iron container together in the following slag.
Certain blast furnace is owing to iron content in the long-term slag is many, and the iron loss of blast furnace is higher, its slag ditch is transformed, to reclaim the molten iron in the slag.Because this blast furnace is Dan Tiekou, it is very short at interval therefore to tap a blast furnace, and is generally less than 30 minutes.In order to realize continuous tapping, take the blast furnace slag iron tripping device of structure shown in Fig. 3 B, and the method for employing cast-in-site is made the structural part of heavy iron pond 8, little iron notch 9, short vertical section 11 and lateral channel 10.Slag iron runner 2 is not done any change with skimmer 4.
After the transformation, for the first time open blast furnace iron notch 1 before, need the little iron notch 9 of shutoff.After blast furnace iron notch 1 was opened, elute was separated into the following slag and the molten iron that contain a small amount of molten iron through skimmer 4, and molten iron flow to storage iron container through trough; The following slag that contains a small amount of molten iron flows into slag ditch 6; When process was sunk iron pond 8, the molten iron natural subsidence was in below, heavy iron pond, and slag flows into storage slag containers through slag ditch 6; When the molten iron height in the heavy iron pond 8 exceeds the height of little iron notch 9; Open little iron notch 9, the molten iron in the heavy iron pond 8 flows into storage iron containers through little iron notch 9, short vertical section 11 and lateral channel 10, and contained molten iron is recycled into qualified iron product in the slag.
Tap a blast furnace after the end at every turn, heavy iron pond 8, little iron notch 9 and short vertical section 11 are left intact, only on the slag iron liquid level that exposes, spread one deck heat preserving agent.
After blast furnace iron notch 1 is opened next time, if when down molten iron occurring in the slag, little iron notch 9 and the circulation naturally under the molten iron effect of short vertical section 11, molten iron flows into storage iron containers through little iron notch 9, short vertical section 11 and lateral channel 10.So circulation.
Certain schreyerite steelmaking furnace is owing to iron content in the long-term slag is many, and the iron loss of blast furnace is higher, and its tripping device is carried out structure of modification.Because this blast furnace is the three-iron mouth, for tapping a blast furnace in turn, it is longer at interval therefore to tap a blast furnace.In order to prevent the molten steel solidification in the short vertical section, take the blast furnace slag iron tripping device of structure shown in Fig. 3 A, the Upstream section that is about to slag ditch 6 digs and deep-cuts the heavy iron pond 8 of wide formation, and surperficial with exempting to toast the mud compacting at it; Bury internal diameter 4cm iron bend pipe (can the oxygen blast pipe clamp be bent and form) underground forming little iron notch 9 at the bottom side in heavy iron pond 8, and an inclination lateral channel 10 is set temporarily, lateral channel 10 is communicated with heavy iron pond 8 through little iron notch 9 in the outside.
When tapping a blast furnace, open blast furnace iron notch 1 after, elute is separated into following slag and the molten iron that contains a small amount of molten iron through skimmer 4, molten iron flow to storage iron container through trough; The following slag that contains a small amount of molten iron flows into slag ditch 6, and when process was sunk iron pond 8, the molten iron natural subsidence was in 8 belows, heavy iron pond.Less or when not having molten iron, Yin Wendu is not enough when the deposited iron water yield in the heavy iron pond 8, the iron bend pipe will can not be melted; When the deposited iron water yield in the heavy iron pond 8 exceeds the height of little iron notch 9; Can carefully rotate iron bend pipe bared end; Make the duct moving slightly; With the contact area that increases molten iron and iron bend pipe and impel the iron bend pipe by molten iron is melting, this moment, little iron notch 9 was opened, and molten iron flows into trough 3 back entering and stores up the iron containers through little iron notch 9, lateral channel 10.
After having gone out iron, the residual slag iron in the little iron notch 9 are cleaned out, laid equal stress on and newly make little iron notch 9, use when tapping a blast furnace next time.
In addition; When the iron amount that reclaims more after a little while, possibly cause that molten iron solidifies in the lateral channel in flow process, can cancel being connected of lateral channel and Chu Tie container this moment; Lateral channel is shortened; The one of which end is communicated with little iron notch, and an end is communicated with the melt pit that temporarily digs, and molten iron is introduced melt pit form ingot pig.
In sum; Blast furnace slag iron tripping device of the present invention, blast furnace slag iron separation method and tap cinder iron recovery method are simple; Both can reduce the blast furnace iron loss, increase economic efficiency, also can prolong skimmer work-ing life, realize working continuously of blast furnace production.
Although combined exemplary embodiment to illustrate and described the present invention, those skilled in the art are noted that and under the situation that does not break away from the spirit and scope of the present invention that are defined by the claims, can make amendment and modification.
Claims (14)
1. blast furnace slag iron tripping device; Said tripping device comprises the slag iron runner that connects blast furnace iron notch, connect slag iron runner and storage iron container and be provided with skimmer trough, is connected the slag iron runner and stores up the slag ditch of slag container; It is characterized in that; Said tripping device also comprises heavy Tie Chi, little iron notch, lateral channel and block piece, wherein
Said heavy iron pond is arranged on the Upstream section of slag ditch, and said heavy iron pond is deeper than and is wider than said slag ditch;
Said little iron notch is opened in the side bottom in heavy iron pond;
One end of said lateral channel is communicated with said little iron notch; The other end of said lateral channel is communicated with trough in the skimmer downstream or the other end of said lateral channel directly is communicated with storage iron container, and said lateral channel has the molten iron of being convenient to mobile obliquity;
Said block piece be removably disposed in before the skimmer with within.
2. blast furnace slag iron tripping device according to claim 1 is characterized in that, said block piece is banked up by exsiccant refractory materials powder and formed.
3. blast furnace slag iron tripping device according to claim 1 is characterized in that, said little iron notch bottom directly is communicated with lateral channel.
4. blast furnace slag iron tripping device according to claim 1 is characterized in that said little iron notch also comprises short vertical section vertically upward, and said short vertical section is communicated with said heavy iron pond and lateral channel.
5. blast furnace slag iron separation method; It is characterized in that; Said separation method adopts each described blast furnace slag iron tripping device in the claim 1 to 4; Use skimmer to carry out under the situation of normal skimming operation not possessing, separate the elute of discharging, obtain slag and molten iron from blast furnace iron notch.
6. blast furnace slag iron separation method according to claim 5 is characterized in that, under unstrained situation of the time of tapping a blast furnace, adopts the described blast furnace slag iron of claim 3 tripping device, and said blast furnace slag iron separation method may further comprise the steps:
With block piece be arranged on before the skimmer with within stoping elute to flow into skimmer, and make said elute can all flow into the slag ditch;
The said little iron notch of shutoff;
Open blast furnace iron notch to discharge elute;
Molten iron height in heavy iron pond is higher than under the situation of height of said little iron notch; Open little iron notch; So that the molten iron of below, heavy iron pond flows into storage iron container through little iron notch, lateral channel in proper order or order flows into storage iron container through little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along the slag ditch;
The back shutoff blast furnace iron notch that finishes that taps a blast furnace is cleaned out slag and molten iron in said little iron notch and the heavy iron pond.
7. blast furnace slag iron separation method according to claim 6 is characterized in that, under the situation about being pressed for time of tapping a blast furnace, adopts the described blast furnace slag iron of claim 4 tripping device, and said blast furnace slag iron separation method may further comprise the steps:
With block piece be arranged on before the skimmer with within to stop elute to flow into skimmer and to make said elute can all flow into the slag ditch;
The said little iron notch of shutoff before tapping a blast furnace for the first time only;
Open blast furnace iron notch to discharge elute;
Molten iron height in heavy iron pond is higher than under the situation of height of said little iron notch; Open little iron notch; So that the molten iron of below, heavy iron pond flows into storage iron container through little iron notch, lateral channel in proper order or order flows into storage iron container through little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along the slag ditch;
The back shutoff blast furnace iron notch that finishes that taps a blast furnace is not cleared up said little iron notch, short vertical section and heavy iron pond, spreads heat preserving agent on the slag in heavy iron pond and short vertical section and the liquid level of molten iron;
After opening blast furnace iron notch once more; When elute is flowed through said heavy iron pond; Institute's iron-bearing water automatic sedimentation in the elute; Order flows into storage iron container through little iron notch, lateral channel or order flows into storage iron container through little iron notch, lateral channel and trough, and the slag of top, heavy iron pond flows into storage slag container along the slag ditch.
8. according to each described blast furnace slag iron separation method in the claim 5 to 7, it is characterized in that, flow into storage iron container directly or indirectly, become qualified molten iron through the effusive molten iron of little iron notch.
9. according to each described blast furnace slag iron separation method in the claim 5 to 7, it is characterized in that, do not flow into storage iron container through the effusive molten iron of little iron notch, dig interim hole at the lateral channel end, molten iron is flowed in the hole becomes ingot pig.
10. tap cinder iron recovery method; It is characterized in that; Said recovery method adopts each described blast furnace slag iron tripping device in the claim 1 to 4; Use skimmer to carry out under the situation of normal skimming operation possessing, cancellation be arranged on before the skimmer with within block piece so that skimmer can carry out normal skimming operation.
11. tap cinder iron recovery method according to claim 10 is characterized in that, under unstrained situation of the time of tapping a blast furnace, adopts the described blast furnace slag iron of claim 3 tripping device, said tap cinder iron recovery method may further comprise the steps:
The said little iron notch of shutoff;
Open blast furnace iron notch to discharge elute, after elute flowed into the slag iron runner from blast furnace iron notch, molten iron flowed into trough through skimmer;
Following slag flows into the slag ditch; Molten iron height in heavy iron pond is higher than under the situation of height of said little iron notch; Open little iron notch; So that the molten iron of below, heavy iron pond flows into storage iron container through little iron notch, lateral channel in proper order or order flows into storage iron container through little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along the slag ditch;
The back shutoff blast furnace iron notch that finishes that taps a blast furnace is cleaned out slag and molten iron in said little iron notch and the heavy iron pond.
12. tap cinder iron recovery method according to claim 10 is characterized in that, under the situation about being pressed for time of tapping a blast furnace, adopts the described blast furnace slag iron of claim 4 tripping device, said tap cinder iron recovery method may further comprise the steps:
The said little iron notch of shutoff before tapping a blast furnace for the first time only;
Open blast furnace iron notch to discharge elute, after elute flowed into the slag iron runner from blast furnace iron notch, molten iron flowed into trough through skimmer;
Following slag flows into the slag ditch; Molten iron height in heavy iron pond is higher than under the situation of height of said little iron notch; Open little iron notch; So that the molten iron of below, heavy iron pond flows into storage iron container through little iron notch, lateral channel in proper order or order flows into storage iron container through little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along the slag ditch;
The back shutoff blast furnace iron notch that finishes that taps a blast furnace is not cleared up said little iron notch, short vertical section and heavy iron pond, spreads heat preserving agent on the slag in heavy iron pond and short vertical section and the liquid level of molten iron;
Open blast furnace iron notch once more; When following slag is flowed through said heavy iron pond; Institute's iron-bearing water automatic sedimentation in the elute; Order flows into storage iron container through little iron notch, lateral channel or order flows into storage iron container through little iron notch, lateral channel and trough, and the slag of top, heavy iron pond flows into storage slag container along the slag ditch.
13. according to each described tap cinder iron recovery method in the claim 10 to 12, it is characterized in that,, become qualified molten iron through the direct or indirect inflow storage iron container of the effusive molten iron of little iron notch.
14., it is characterized in that according to each described tap cinder iron recovery method in the claim 10 to 12, do not flow into storage iron container through the effusive molten iron of little iron notch, dig interim hole at the lateral channel end, molten iron is flowed in the hole becomes ingot pig.
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| CN113416804A (en) * | 2021-06-21 | 2021-09-21 | 安徽长江钢铁股份有限公司 | Gate plugging mechanism for slag flushing water tank |
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| CN117431354B (en) * | 2023-12-20 | 2024-03-15 | 江苏沙钢集团有限公司 | Blast furnace slag iron runner arrangement system |
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