CN102618678B - 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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- CN102618678B CN102618678B CN201210085334.4A CN201210085334A CN102618678B CN 102618678 B CN102618678 B CN 102618678B CN 201210085334 A CN201210085334 A CN 201210085334A CN 102618678 B CN102618678 B CN 102618678B
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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 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 blast furnace casting process, slag iron (, slag and molten iron) is discharged from iron notch simultaneously.Stokehold skimmer is the device for separating slag iron, and can it normally work, and has directly determined whether blast furnace production can continue to carry out.In period such as such as blast furnace opening, special furnace condition recovery (blast furnace thermojunction etc.) etc., because the mobility of slag iron mixing liquid is bad, inferior separating effect, directly adopt skimmer to separate slag and molten iron, likely cause passageway, skimmer below eye to stick with paste dead, the stokehold condition of tapping a blast furnace and interrupt, even blast furnace is forced to damping down.
For this situation, existing treatment process is to make slag, molten iron without skimmer, is directly flowed into storage slag container or is entered flush slag technique by slag ditch.But storage slag container material quality is generally irony, if flow into storage slag container with the more slag of iron, very easily cause storage slag container to burn, even burn out storage slag container traffic road.In addition,, if slag, by flush slag art breading, because its iron-holder is high, is easily blasted after chance water, aggravated potential safety hazard.If not separated slag iron is directly worked as to slag treatment, will cause blast furnace iron loss to increase, financial loss is serious.
In addition, in blast furnace normal productive process, owing to smelting mineral (as schreyerite is smelted, slag iron inferior separating effect) or crude fuel condition (as poor in coke quality, furnace temperature level control higher, slag iron viscosity is large, inferior separating effect) restriction, may cause short-term or long-term slag iron inferior separating effect, the slag (descending slag) after skimmer still contains with a large amount of molten iron, if this partial molten iron directly enters slag ladle or grain slag technique, can cause too financial loss and potential safety hazard.
In sum, need badly and a kind ofly do not possessing under the operating mode of skimmer of use, still can separate as requested device and the corresponding method of slag and molten iron and continuous tapping; And possess under the operating mode that uses skimmer, can further improve device and the correlation method of metal recovery rate.
Summary of the invention
An aspect of of the present present invention provides a kind of blast furnace slag iron tripping device; described 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; realize while tapping a blast furnace again behind continuous tapping and long-time interval, all can meet molten iron logistics demand.Another aspect of the present invention provides a kind of blast furnace slag iron separation method, and described 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 described tap cinder iron recovery method adopts above-mentioned blast furnace slag iron tripping device, can reduce the band iron amount of lower slag, reduces iron loss, and realizes continuous high-efficient operation.
According to blast furnace slag iron tripping device of the present invention, it comprises and connects slag iron runner, connection slag iron runner and the storage iron container of blast furnace iron notch and be provided with the trough of skimmer, the slag ditch that is connected slag iron runner and stores up slag container, described tripping device also comprises heavy Tie Chi, little iron notch, lateral channel and block piece, wherein, described heavy iron pond is arranged on the Upstream section of slag ditch, and described heavy iron pond is deeper than and is wider than described slag ditch; Described little iron notch is opened in the side bottom in heavy iron pond; One end of described lateral channel is communicated with described little iron notch, the other end of described lateral channel is communicated with trough in skimmer downstream or the other end of described lateral channel is directly communicated with storage iron container, and described lateral channel has the obliquity of being convenient to molten iron flow; Within described block piece is removably disposed in skimmer and before.
According to blast furnace slag iron tripping device of the present invention, described block piece is banked up and is formed by the refractory materials powder being dried.
According to blast furnace slag iron tripping device of the present invention, described little iron notch can design a short vertical section vertically upward as required, and described short vertical section is communicated with described heavy iron pond and lateral channel; Also can cancel as required vertical section, little iron notch bottom is directly communicated with lateral channel.
According to a further aspect in the invention, provide a kind of blast furnace slag iron separation method, described blast furnace slag iron separation method adopts aforementioned blast furnace slag iron tripping device, in the situation that 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, described separation method comprises the steps: do not possessing the skimmer of use carry out normal skimming operation in the situation that, block piece is filled up before skimmer and within, and before skimmer, pile high, to stop effluent to flow into skimmer, and make described effluent can all flow into slag ditch; The little iron notch of shutoff; Open blast furnace iron notch to discharge effluent, effluent is from blast furnace iron notch flows into slag iron runner, and molten iron, through skimmer, flows into trough; Lower slag flows into slag ditch, the height of molten iron height in heavy iron pond higher than described little iron notch, open little iron notch, so that the molten iron order of below, heavy iron pond flows into storage iron container by little iron notch, lateral channel or order flows into storage iron container by little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along slag ditch; Shutoff blast furnace iron notch after tapping a blast furnace, cleans out slag and molten iron in described little iron notch and heavy iron pond.
According to blast furnace slag iron separation method of the present invention, require very in short-term the interval 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.Gone out after iron, described short vertical section and heavy iron pond will be filled by molten iron at every turn, and device, without doing any processing and holding time not, is convenient to opening at any time of iron mouth next time, beat after tapping outlet, molten iron can natural subsidence to sinking iron pond, little iron notch smoothly circulates; Require the interval time of tapping a blast furnace for twice when front and back when longer, the design of above-mentioned short vertical section easily causes the molten steel solidification of little iron notch and heavy iron pond deposition, and while causing again tapping a blast furnace, tripping device cannot use.Now, can cancel as required short vertical section, the little iron notch bottom of blast furnace slag iron tripping device is directly communicated with lateral channel, go out after an iron, in little iron notch and heavy iron pond, slag iron all flows out, recycling interval time of tapping a blast furnace, upper once tap a blast furnace before by little iron notch and heavy iron pond is cleaned out and again stifled good little iron notch on carrying out, once tap a blast furnace.
According to a third aspect of the invention we, a kind of tap cinder iron recovery method is provided, described tap cinder iron recovery method adopts above-mentioned blast furnace slag iron tripping device, removal be arranged on before skimmer and within block piece so that skimmer can carry out normal skimming operation, reclaim the molten iron in slag from skimmer discharge, obtain iron level slag and increase hot metal output still less.
According to tap cinder iron recovery method of the present invention, described tap cinder iron recovery method comprise the steps: that removal is arranged on before skimmer and 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 effluent; Lower slag flows into slag ditch, the height of molten iron height in heavy iron pond higher than described little iron notch, open little iron notch, so that the molten iron order of below, heavy iron pond flows into storage iron container by little iron notch, lateral channel or order flows into storage iron container by little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along slag ditch.
Shutoff blast furnace iron notch after tapping a blast furnace, cleans out slag and molten iron in described little iron notch and heavy iron pond.The height of molten iron height in heavy iron pond higher than described little iron notch, open little iron notch, so that the molten iron order of below, heavy iron pond flows into storage iron container by little iron notch, lateral channel or order flows into storage iron container by little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along slag ditch.
According to tap cinder iron recovery method of the present invention, when tapping a blast furnace, require very in short-term interval time, preferably use little iron notch to comprise the blast furnace slag iron tripping device of short vertical section, gone out after iron, short vertical section and heavy iron pond will be filled by molten iron at every turn, and device is without doing any processing and holding time not, this is convenient to opening at any time of iron mouth next time, beat after tapping outlet, molten iron can natural subsidence to heavy iron pond, little iron notch smoothly circulates; In the time that the interval time of tapping a blast furnace, requirement was longer, short vertical section easily causes the molten steel solidification of little iron notch and heavy iron pond deposition, and while causing again tapping a blast furnace, tripping device cannot use.Now, can cancel as required short vertical section, little iron notch bottom is directly communicated with lateral channel, after having gone out an iron, slag iron in little iron notch and heavy iron pond all flows out, recycling is tapped a blast furnace interval time, upper once tap a blast furnace before by little iron notch and heavy iron pond is cleaned out and again stifled good little iron notch on carrying out, once tap a blast furnace.
Compared with prior art, blast furnace slag iron tripping device of the present invention and separation method have advantages of mobility strong, relative unit making method, size have flexibility and changeability, by judging that actual condition selects suitable tripping device and method, thus normal production continuously of realizing blast furnace; The molten iron of separating finally enters storage iron container, becomes qualified iron product; The operation of blocking up before the short vertical section being connected with little iron notch can be avoided tapping a blast furnace at every turn, has reduced labour intensity and has shortened the interval time of tapping a blast furnace, and has effectively improved the rate of recovery and the capacity factor of a blast furnace of iron.In addition, tap cinder iron recovery method of the present invention can reduce lower slag band iron amount, reduces iron loss, and realizes continuous high-efficient operation.
Brief description of the 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 intercepting along A-A line of the blast furnace slag iron tripping device in Fig. 2 A.
Fig. 3 A is the first 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 of 8-pond, the little iron notch of 9-, 10-lateral channel, the short vertical section of 11-, 12-block piece.
Embodiment
Those skilled in the art in the invention describe exemplary embodiment of the present invention in detail now with reference to accompanying drawing, so that can easily implement exemplary embodiment of the present invention.
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.As 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, slag and molten iron are from blast furnace iron notch 1 flows out, by skimmer 4, it is separated, isolated molten iron flows into storage iron container by trough 3, isolated slag flows into storage slag container by slag ditch 6, separates thereby complete slag iron.If but blast furnace skimmer can not normally use, use this tripping device to separate in slag iron thickness or the more situation of slag band iron, can bring a lot of detrimentally affects to tripping device and product separation, even blocks the continuous production of blast furnace.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 intercepting along A-A line of the blast furnace slag iron tripping device in Fig. 2 A.Blast furnace slag iron tripping device according to an exemplary embodiment of the present invention, it comprises and connects slag iron runner 2, connection slag iron runner 2 and the storage iron container 5 of blast furnace iron notch 1 and be 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, the other end of lateral channel 10 is communicated with trough 3 or the other end of lateral channel 10 is directly communicated with storage iron container 5, block piece 12 be removably disposed in before skimmer 4 with within.
Because the proportion of molten iron is greater than slag, the effluent (being designated hereinafter simply as effluent) of therefore discharging from iron notch in the time of blast furnace casting flows into heavy iron pond 8, and molten iron can be deposited on 8 bottoms, iron pond and flow into storage iron container 5 by little iron notch 9, lateral channel 10, trough 3.And slag is after the centrifugation in heavy iron pond 8, because it is light compared with iron, slag can float on heavy 8 tops, iron pond and flow into storage slag containers 7 or form grain slag by flush slag technique by slag ditch 6 after send into storage slag container 7.
Wherein, heavy iron pond 8 should be deeper than and be wider than slag ditch 6, can be the conventional shape such as circular, square to ensure that effluent stream has a convolution, its shape to herein time.When concrete enforcement, existing slag ditch 6 can be dug to the wide heavy iron of the dark formation pond 8 of digging, preferably, the surface in heavy iron pond 8 forms with refractory materials compacting and sprinkled with one deck yellow ground, with antiseized ditch.The formation of little iron notch 9 can ensure under unimpeded condition, the side bottom in heavy iron pond 8 excavate or buried pipeline to form the passage that taps a blast furnace of the heavy iron of this connection pond 8 and lateral channel 10, its shape can be also the 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 for introducing trough 3 by the molten iron of deposition, and lateral channel 10 need have the obliquity of being convenient to molten iron flow, and this obliquity is as long as ensure that molten iron can successfully flow into trough 3 naturally.Lateral channel 10 can be to dig temporarily, and the used time can directly not fill and lead up, and reality need be suppressed with iron runner material in its surface.Block piece 12 is in order to make in the time not using skimmer 4, allows effluent can flow into slag ditch 6 completely, and prevents that skimmer 4 from being stopped up by effluent.Block piece 12 is banked up and is formed by the refractory materials powder being dried, and is convenient to be shaped rapidly 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 the first 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.
As shown in Figure 3A, the first is comparatively common structure design, and heavy iron pond 8 is directly connected with lateral channel 10 by little iron notch 9.Use the tripping device of this structure after each sepn process finishes, to clear up in time remaining molten iron and slag in heavy iron pond 8 and little iron notch 9, the then good little iron notch 9 of shutoff, in order to lower subnormal use.The advantage of this design is: simple in structure, dimensionally stable resistance to erosion, and go out heavy Tie Chi, little iron notch and lateral channel passage after iron and naturally flowed sky, can not result in blockage; Shortcoming is: after having gone out iron, need clean out the slag iron of little iron notch front and back and again block up good little iron notch at every turn, need about 20 minutes consuming time.
As shown in Figure 3 B, in the second 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, require dimensionally on short vertical section 11 outsides along on the height at A place and heavy iron pond along C place with high, under short vertical section inner side along the height at B place lower than short vertical section outside above along the height at A place.While using this structure, after flash liberation end of processing, heavy iron pond 8 and little iron notch 9 are filled by liquid molten iron, form communicating vessels, while tapping a blast furnace next time without cleaning slag iron runner, molten iron by automatic sedimentation, and flows into lateral channel 10 by little iron notch 9, short vertical section 11 in heavy iron pond 8, realizes continuously every continuous tapping.This structural disadvantages is: in the time that twice interval of tapping a blast furnace is longer, because this place's molten iron deposition is few, easily solidify, so this structure, preferentially for the shorter operating mode in the interval of tapping a blast furnace, or is equipped with effective Insulation.
Blast furnace slag iron tripping device is introduced blast furnace slag iron separation method of the present invention and lower slag iron recovery method in detail according to an exemplary embodiment of the present invention below.While using blast furnace slag iron tripping device of the present invention to carry out the separation of blast furnace slag iron and the recovery of lower slag iron, need to select different apparatus and method according to different operating modes.
Wherein, possessing and use skimmer to carry out the situation of normal skimming operation and do not possess the situation that uses skimmer to carry out normal skimming operation, is that those skilled in the art such as, such as, easily determine according to the state (viscosity, mobility) of operation stage (blow-on initial stage, the special working of a furnace, mineral) and effluent etc.Tap a blast furnace and specifically refer to the timed interval of tapping a blast furnace in front and back interval time, whether the anxiety of the interval time of tapping a blast furnace, is also that those skilled in the art easily determine.
Blast furnace slag iron separation method of the present invention is not possess the skimmer 4 of use carry out normal skimming operation in the situation that, first before block piece 12 being arranged on to skimmer 4 and within to stop effluent to flow into skimmer 4, and make effluent can all flow into slag ditch 6, and the little iron notch 9 of shutoff.Then, open blast furnace iron notch 1 to discharge effluent.
The first situation: in the time of tapping a blast furnace be not very nervous in the situation that, blast furnace slag iron tripping device is preferentially selected the project organization of Fig. 3 A, until effluent from blast furnace iron notch 1 flows into slag iron runner 2, observe the situation of effluent, the height of molten iron height in heavy iron pond 8 higher than little iron notch 9, open little iron notch 9, so that the molten iron order of 8 belows, heavy iron pond is by little iron notch 9, lateral channel 10 flows into storage iron container 5 or order is passed through little iron notch 9, lateral channel 10 and trough 3 flow into storage iron container 5, the slag of 8 tops, heavy iron pond flows into storage slag container 7 along slag ditch 6, realizing blast furnace casting process slag iron separates.This in order to ensure the normal separation of next slag iron, need be cleaned out the residual slag iron in little iron notch 9 and heavy iron pond 8 after tapping a blast furnace and finishing, and the little iron notch 9 of shutoff again.
A second situation: tapping a blast furnace get much time in the situation that, blast furnace slag iron tripping device is preferentially selected the project organization of Fig. 3 B, until effluent from blast furnace iron notch 1 flows into slag iron runner 2, observe the situation of effluent, the height of molten iron height in heavy iron pond 8 higher than little iron notch 9, open little iron notch 9, so that the molten iron order of 8 belows, heavy iron pond is by little iron notch 9, lateral channel 10 flows into storage iron container 5 or order is passed through little iron notch 9, lateral channel 10 and trough 3 flow into storage iron container 5, the slag of 8 tops, heavy iron pond flows into storage slag container 7 along slag ditch 6, realizing blast furnace casting process slag iron separates.After this taps a blast furnace and finishes, whole heavy iron pond 8, little iron notch 9, short vertical section 11 have all been sealed up by high-temperature liquid state molten iron, and molten iron wherein can not solidify at short notice.Therefore, the in the situation that of very short in the interval time of tapping a blast furnace, without doing any processing or taking certain Insulation, can continuous tapping, after blast furnace iron notch 1 is opened next time, slag directly flows through from slag ditch 6, after molten iron sedimentation, flows into lateral channel 10 by little iron notch 9 and short vertical section 11, and realization is worked continuously.
Tap cinder iron recovery method of the present invention is to possess the skimmer of use carry out normal skimming operation in the situation that, 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, lower slag refers to process the slag under backstop via skimmer skimming, wherein may contain a small amount of molten iron.
Then, open blast furnace iron notch 1 to discharge effluent.
The first situation: in lower slag,, in the little situation of iron-holder, blast furnace slag iron tripping device is preferentially selected the project organization of Fig. 3 A.Until effluent from blast furnace iron notch 1 flows into slag iron runner 2, molten iron flows into trough 3 through skimmer 4, lower slag flows into slag ditch 6, observe the situation of lower slag, the height of molten iron height in heavy iron pond 8 higher than little iron notch 9, open little iron notch 9 so that the molten iron order of 8 belows, heavy iron pond flows into storage iron container 5 by little iron notch 9, lateral channel 10 or order flows into storage iron container 5 by little iron notch 9, lateral channel 10 and trough 3, the slag of 8 tops, heavy iron pond flows into storage slag container 7 along slag ditch 6, realizes slag iron under blast furnace casting process and reclaims.This for ensureing the normal separation of next slag iron, need be cleaned out the residual slag iron in little iron notch 9 and heavy iron pond 8 after tapping a blast furnace and finishing, and the little iron notch 9 of shutoff again.
The second situation: in the larger situation of lower slag iron-holder, blast furnace slag iron tripping device is preferentially selected the project organization of Fig. 3 B.Until effluent from blast furnace iron notch 1 flows into slag iron runner 2, molten iron flows into trough 3 through skimmer 4, lower slag flows into slag ditch 6, observe the situation of lower slag, the height of molten iron height in heavy iron pond 8 higher than little iron notch 9, open little iron notch 9 so that the molten iron order of 8 belows, heavy iron pond flows into storage iron container 5 by little iron notch 9, lateral channel 10 or order flows into storage iron container 5 by little iron notch 9, lateral channel 10 and trough 3, the slag of 8 tops, heavy iron pond flows into storage slag container 7 along slag ditch 6, realizes slag iron under blast furnace casting process and reclaims.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 high-temperature liquid state molten iron, and molten iron wherein can not solidify at short notice.Therefore,, the in the situation that of very short in the interval time of tapping a blast furnace, without doing any processing or taking certain Insulation, can realize continuous tapping.After blast furnace iron notch 1 is opened next time, slag directly flows through from slag ditch 6, after molten iron sedimentation, flows into lateral channel 10 by little iron notch 9, short vertical section 11, has realized and having worked continuously.
Also,, in the time that blast furnace does not possess the condition that uses skimmer to separate slag iron, blast furnace slag iron tripping device of the present invention just plays the object that substitutes skimmer separation slag iron.In the time that blast furnace possesses the condition that uses skimmer to separate slag iron, can be according to the difference of smelting mineral, if slag iron inferior separating effect can retain heavy iron pond 8, little iron notch 9 and lateral channel 10 and continue to use as lower slag iron retrieving arrangement; If slag iron separating effect is better, heavy iron pond 8 can be filled into, shutoff little iron notch 9 consistent with the width degree of depth of slag ditch 6, 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.
embodiment 1
According to the structure shown in 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 slag ditch.Put the furnace in blast after igniting, because furnace temperature is higher, the poor fluidity of molten iron, slag, in order to prevent that effluent from flowing into skimmer 4 and cause skimmer 4 to stick with paste dead and affect the normal separation of stokehold slag iron, before separation with yellow sand before skimmer 4 with within form block piece.
Carry out tapping a blast furnace for the first time after blast furnace opening.Opening for the first time before blast furnace iron notch 1, the little iron notch 9 of shutoff.After blast furnace iron notch 1 is opened, effluent directly flows into slag ditch 6 from slag iron runner 2, goes out 10 tons of the quantity of slag, has no iron.Therefore,, without disclosing out little iron notch 9, also without tripping device is cleared up, can continue to tap a blast furnace.
Carrying out blast furnace taps a blast furnace for the second time.Open blast furnace iron notch 1 for the second time, after about 30 minutes, in effluent, there is molten iron, be in charge of and disclose out little iron notch 9 with four rapidly, effluent flows in heavy iron pond 8 and separates, molten iron enters storage iron container after flowing into trough 3 by little iron notch 9, lateral channel 10, 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 the poor fluidity of molten iron, slag, 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 exposing, spread one layer of heat preservation 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 effluent, but due to blow-on initial stage slag iron thickness, causes little iron notch 9 and short vertical section 11 slag iron to form and partly solidifies, and fails nature circulation.Now, with irony tubule pass into a small amount of oxygen, insert heavy iron pond 8 and short vertical section after 11,2 minutes little iron notch 9 burnt out, molten iron enters storage iron container after flowing into trough 3 by little iron notch 9, lateral channel 10, 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 the poor fluidity of molten iron, slag, 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 exposing, spread one layer of heat preservation agent, and be used in device 8,9,11 tops and set up 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, in effluent, there is molten iron, little iron notch 9 and short vertical section 11 circulate naturally, molten iron enters storage iron container after flowing into trough 3 by little iron notch 9, lateral channel 10, goes out 60 tons of the quantity of slag, 50 tons of the amounts of tapping a blast furnace, and the mobility of molten iron, slag is obviously improved, 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 exposing, spread one layer of heat preservation agent.
When blast furnace goes out the 5th iron, after blast furnace iron notch 1 is opened, in about about 1 minute effluent, there is molten iron, molten iron enters storage iron container after flowing into trough 3 by little iron notch 9, lateral channel 10, goes out 40 tons of the quantity of slag, 60 tons of the amounts of tapping a blast furnace, and the mobility of molten iron, slag is better, possesses the condition of normally tapping a blast furnace that uses skimmer 4, by before skimmer 4 and within yellow sand dig, and skimmer 4 use gas fires are dried, all the other do not do and change.
After 30 minutes, preparation work completes, and blast furnace goes out iron the 6th time.After blast furnace iron notch 1 is opened, effluent is iron substantially entirely, and molten iron directly flows into trough 3 by skimmer 4, then flow to storage iron container.Tap a blast furnace after 15 minutes, in effluent, start to contain slag, after skimmer skimming is processed, in slag ditch 6, have lower slag to flow into, molten iron remaining in lower slag flows in trough 3 by little iron notch 9 and lateral channel 10, enters storage iron container with flow through next molten iron from skimmer 4 together with.
embodiment 2
Certain blast furnace is because iron content in 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 slag.Because this blast furnace is Dan Tiekou, the interval of therefore tapping a blast furnace is very short, 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 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.Slag iron runner 2 and skimmer 4 are without any changes.
After transformation, open for the first time before blast furnace iron notch 1, need the little iron notch 9 of shutoff.After blast furnace iron notch 1 is opened, effluent, by skimmer 4, is separated into lower slag and molten iron containing a small amount of molten iron, and molten iron flow to storage iron container through trough; Lower slag containing a small amount of molten iron flows into slag ditch 6, during through heavy iron pond 8, molten iron natural subsidence is in below, heavy iron pond, slag flows into storage slag container through slag ditch 6, in the time that the molten iron height in heavy iron pond 8 exceeds the height of little iron notch 9, open little iron notch 9, the molten iron in heavy iron pond 8 flows into storage iron container through little iron notch 9, short vertical section 11 and lateral channel 10, and in slag, contained molten iron is recycled into qualified iron product.
Tap a blast furnace after 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 exposing, spread one layer of heat preservation agent.
After blast furnace iron notch 1 is opened next time, if while there is molten iron in lower slag, little iron notch 9 and short vertical section 11 be circulation naturally under molten iron effect, and molten iron flows into storage iron container by little iron notch 9, short vertical section 11 and lateral channel 10.So circulation.
embodiment 3
Certain schreyerite steelmaking furnace is because iron content in long-term slag is many, and the iron loss of blast furnace is higher, and its tripping device is carried out to structure of modification.Because this blast furnace is three-iron mouth, for tapping a blast furnace in turn, the interval of therefore tapping a blast furnace is longer.In order to prevent the molten steel solidification in short vertical section, take the blast furnace slag iron tripping device of structure shown in Fig. 3 A, dig and deep-cut the heavy iron of wide formation pond 8 by the Upstream section of slag ditch 6, and surperficial with exempting to toast mud compacting at it; Bottom side in heavy iron pond 8 is buried internal diameter 4cm iron bend pipe (oxygen blast pipe clamp can be bent and forms) underground to form little iron notch 9, and an inclination lateral channel 10 is set in outside temporarily, by little iron notch 9, lateral channel 10 is communicated with heavy iron pond 8.
While tapping a blast furnace, open after blast furnace iron notch 1, effluent is separated into lower slag and the molten iron containing a small amount of molten iron by skimmer 4, and molten iron flow to storage iron container through trough; Lower slag containing a small amount of molten iron flows into slag ditch 6, and during through heavy iron pond 8, molten iron natural subsidence is in 8 belows, heavy iron pond.When the deposited iron water yield in heavy iron pond 8 is less or during without molten iron, Yin Wendu is inadequate, iron bend pipe will can not be melted; In the time that the deposited iron water yield in heavy iron pond 8 exceeds the height of little iron notch 9, can carefully rotate iron bend pipe bared end, make duct slightly moving, to increase the contact area of molten iron and iron bend pipe and to impel iron bend pipe by molten iron is melting, now little iron notch 9 is opened, and molten iron enters storage iron container after flowing into trough 3 by little iron notch 9, lateral channel 10.
Go out after an iron, the residual slag iron in little iron notch 9 has been cleaned out, laid equal stress on and newly make little iron notch 9, prepared against while tapping a blast furnace next time and use.
In addition, in the time that the iron amount reclaiming is less, may cause molten iron in lateral channel to solidify in flow process, now can cancel the connection of lateral channel and Chu Tie container, lateral channel is shortened, its one end is communicated with little iron notch, and one end is communicated with the melt pit temporarily digging, and molten iron is introduced to melt pit and 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 blast furnace iron loss, increase economic efficiency, also can extend skimmer work-ing life, realize working continuously that blast furnace produces.
Although illustrated and described the present invention in conjunction with exemplary embodiment, those skilled in the art are noted that in the case of not departing from the spirit and scope of the present invention that are defined by the claims, can modify and modification.
Claims (12)
1. a blast furnace slag iron tripping device, described tripping device comprise connect blast furnace iron notch slag iron runner, connect slag iron runner and storage iron container and be provided with skimmer trough, is connected slag iron runner and stores up the slag ditch of slag container, it is characterized in that, described tripping device also comprises heavy Tie Chi, little iron notch, lateral channel and block piece, wherein
Described heavy iron pond is arranged on the Upstream section of slag ditch, and described heavy iron pond is deeper than and is wider than described slag ditch;
Described little iron notch is opened in the side bottom in heavy iron pond;
One end of described lateral channel is communicated with described little iron notch, the other end of described lateral channel is communicated with trough in skimmer downstream or the other end of described lateral channel is directly communicated with storage iron container, and described lateral channel has the obliquity of being convenient to molten iron flow;
Described little iron notch bottom is directly communicated with lateral channel, or described little iron notch also comprises short vertical section vertically upward, the described short vertical section described heavy iron pond of connection and lateral channel;
Described block piece be removably disposed in before skimmer and within to stop the effluent of blast furnace iron notch to be provided with the trough of skimmer described in flowing in the time not using skimmer.
2. blast furnace slag iron tripping device according to claim 1, is characterized in that, described block piece is banked up and formed by the refractory materials powder being dried.
3. a blast furnace slag iron separation method, it is characterized in that, described separation method adopts the blast furnace slag iron tripping device described in any one in claim 1 to 2, do not possessing the skimmer of use carry out normal skimming operation in the situation that, separate the effluent of discharging from blast furnace iron notch, obtain slag and molten iron.
4. blast furnace slag iron separation method according to claim 3, it is characterized in that, in unstrained situation of the time of tapping a blast furnace, the blast furnace slag iron tripping device that adopts little iron notch bottom to be directly communicated with lateral channel, described blast furnace slag iron separation method comprises the following steps:
Block piece is arranged on before skimmer and within to stop effluent to flow into skimmer, and make described effluent can all flow into slag ditch;
Little iron notch described in shutoff;
Open blast furnace iron notch to discharge effluent;
The height of molten iron height in heavy iron pond higher than described little iron notch, open little iron notch, so that the molten iron order of below, heavy iron pond flows into storage iron container by little iron notch, lateral channel or order flows into storage iron container by little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along slag ditch;
Shutoff blast furnace iron notch after tapping a blast furnace, cleans out slag and molten iron in described little iron notch and heavy iron pond.
5. blast furnace slag iron separation method according to claim 3, it is characterized in that, tapping a blast furnace be pressed for time in the situation that, adopt little iron notch also to comprise the blast furnace slag iron tripping device of short vertical section vertically upward, described blast furnace slag iron separation method comprises the following steps:
Block piece is arranged on before skimmer and within to stop effluent flow into skimmer and make described effluent can all flow into slag ditch;
Only little iron notch described in shutoff before tapping a blast furnace for the first time;
Open blast furnace iron notch to discharge effluent;
The height of molten iron height in heavy iron pond higher than described little iron notch, open little iron notch, so that the molten iron order of below, heavy iron pond flows into storage iron container by little iron notch, lateral channel or order flows into storage iron container by little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along slag ditch;
Shutoff blast furnace iron notch after tapping a blast furnace, does not clear up described little iron notch, short vertical section and heavy iron pond, on the slag in heavy iron pond and short vertical section and the liquid level of molten iron, spreads heat preserving agent;
Again open after blast furnace iron notch, effluent stream is in the time of described heavy iron pond, institute's iron-bearing water automatic sedimentation in effluent, order flows into storage iron container by little iron notch, lateral channel or order flows into storage iron container by little iron notch, lateral channel and trough, and the slag of top, heavy iron pond flows into storage slag container along slag ditch.
6. according to the blast furnace slag iron separation method described in any one in claim 4 to 5, it is characterized in that, the molten iron flowing out by little iron notch flows into storage iron container directly or indirectly, becomes qualified molten iron.
7. according to the blast furnace slag iron separation method described in any one in claim 4 to 5, it is characterized in that, the molten iron flowing out by little iron notch does not flow into storage iron container, digs interim hole at lateral channel end, and molten iron is flowed in hole becomes ingot pig.
8. a tap cinder iron recovery method, it is characterized in that, described recovery method adopts the blast furnace slag iron tripping device described in any one in claim 1 to 2, possessing the skimmer of use carry out normal skimming operation in the situation that, cancel before being arranged on skimmer and within block piece so that skimmer can carry out normal skimming operation.
9. tap cinder iron recovery method according to claim 8, it is characterized in that, in unstrained situation of the time of tapping a blast furnace, the blast furnace slag iron tripping device that adopts little iron notch bottom to be directly communicated with lateral channel, described tap cinder iron recovery method comprises the following steps:
Little iron notch described in shutoff;
Open blast furnace iron notch to discharge effluent, effluent is from blast furnace iron notch flows into slag iron runner, and molten iron, through skimmer, flows into trough;
Lower slag flows into slag ditch, the height of molten iron height in heavy iron pond higher than described little iron notch, open little iron notch, so that the molten iron order of below, heavy iron pond flows into storage iron container by little iron notch, lateral channel or order flows into storage iron container by little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along slag ditch;
Shutoff blast furnace iron notch after tapping a blast furnace, cleans out slag and molten iron in described little iron notch and heavy iron pond.
10. tap cinder iron recovery method according to claim 8, it is characterized in that, tapping a blast furnace be pressed for time in the situation that, adopt little iron notch also to comprise the blast furnace slag iron tripping device of short vertical section vertically upward, described tap cinder iron recovery method comprises the following steps:
Only little iron notch described in shutoff before tapping a blast furnace for the first time;
Open blast furnace iron notch to discharge effluent, effluent is from blast furnace iron notch flows into slag iron runner, and molten iron, through skimmer, flows into trough;
Lower slag flows into slag ditch, the height of molten iron height in heavy iron pond higher than described little iron notch, open little iron notch, so that the molten iron order of below, heavy iron pond flows into storage iron container by little iron notch, lateral channel or order flows into storage iron container by little iron notch, lateral channel and trough, the slag of top, heavy iron pond flows into storage slag container along slag ditch;
Shutoff blast furnace iron notch after tapping a blast furnace, does not clear up described little iron notch, short vertical section and heavy iron pond, on the slag in heavy iron pond and short vertical section and the liquid level of molten iron, spreads heat preserving agent;
Again open blast furnace iron notch, when lower slag is flowed through described heavy iron pond, institute's iron-bearing water automatic sedimentation in effluent, order flows into storage iron container by little iron notch, lateral channel or order flows into storage iron container by little iron notch, lateral channel and trough, and the slag of top, heavy iron pond flows into storage slag container along slag ditch.
11. according to the tap cinder iron recovery method described in any one in claim 9 to 10, it is characterized in that, the direct or indirect inflow storage iron container of molten iron flowing out by little iron notch, becomes qualified molten iron.
12. according to the tap cinder iron recovery method described in any one in claim 9 to 10, it is characterized in that, the molten iron flowing out by little iron notch does not flow into storage iron container, digs interim hole at lateral channel end, and molten iron is flowed in hole becomes ingot pig.
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| CN104404185B (en) * | 2014-11-27 | 2016-08-24 | 上海宝钢节能环保技术有限公司 | A kind of blast furnace cinder quantification part flow arrangement and shunt method |
| CN104858411B (en) * | 2015-04-07 | 2017-01-04 | 巩义市华伟耐火材料厂 | A kind of slag, ferrum, lead mixture three separate slag skimmer and separation method thereof |
| CN109402308A (en) * | 2018-12-04 | 2019-03-01 | 宁夏森源重工设备有限公司 | A kind of large size mineral hot furnace is come out of the stove slag running gate system of combing |
| CN109609713A (en) * | 2019-01-21 | 2019-04-12 | 浙江华源通冶金科技有限公司 | A kind of device and method that can reduce blast furnace iron outlet groove iron loss |
| CN113416804B (en) * | 2021-06-21 | 2022-10-14 | 安徽长江钢铁股份有限公司 | Gate plugging mechanism of slag flushing water tank |
| 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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