CN100572565C - Hot metal pretreatment method and pretreatment unit thereof - Google Patents
Hot metal pretreatment method and pretreatment unit thereof Download PDFInfo
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- CN100572565C CN100572565C CNB2007100615913A CN200710061591A CN100572565C CN 100572565 C CN100572565 C CN 100572565C CN B2007100615913 A CNB2007100615913 A CN B2007100615913A CN 200710061591 A CN200710061591 A CN 200710061591A CN 100572565 C CN100572565 C CN 100572565C
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Abstract
A kind of hot metal pretreatment method and pretreatment unit thereof, the hot metal pretreatment method is that the molten iron of blast furnace is flowed into the pretreatment reaction groove that is divided into desulfurization pretreatment section, desiliconization pretreatment section, dephosphorization pretreatment section by skimmer, be blown into corresponding pretreating agent respectively three pretreatment section, and molten iron is stirred.It comprises dusting device, molten steel pretreatmenting container the hot metal pretreatment device, spray gun device, agitator and sweep-up pipe, the discharge port of dusting device links to each other with the spray gun of spray gun device, it is characterized in that: said molten steel pretreatmenting container is the pretreatment reaction groove that is separated into desulfurization pretreatment section, desiliconization pretreatment section and dephosphorization pretreatment section by three skimmers, the heat-insulating and sealing dust cover is being set above the pretreatment reaction groove, spray gun device and agitator are arranged on the dust cover, and the stirring rake of spray gun and agitator stretches into molten iron.Hot metal pretreatment of the present invention and blast furnace casting carry out synchronously, and required facility is simple.
Description
Technical field
The present invention relates to a kind of hot metal pretreatment method and pretreatment unit thereof.
Background technology
Hot metal pretreatment is divided into desulfurizing iron pre-treatment, desiliconization of hot metal pre-treatment and dephosphorization of molten iron sulphur (abbreviation dephosphorization, desiliconization and desophorization for hot metal) pre-treatment.
The existing pretreated method of dephosphorization, desiliconization and desophorization for hot metal is: at first carry out the desiliconization of hot metal pre-treatment, silicon content is reduced to below 0.10%～0.15%, carry out dephosphorization desulfurization simultaneously pre-treatment again.The desiliconization of hot metal pre-treatment is divided into casting house desiliconization and iron ladle desiliconization, wherein the casting house desiliconization is to add the desiliconization agent desiliconization in blast furnace casting in trough or swinging flow jet, the nature that is added with of desiliconization agent falls method and blowing process, effect with blowing process is best, and present use less of the method that falls naturally, in trough during desiliconization, a segment distance after desiliconization agent adds point that has is provided with skimmer, desiliconization slag is separated, have desiliconization is not set in skimmer or the swinging flow jet time, desiliconization slag all enters iron ladle; The iron ladle desiliconization is to carry out in special preprocessing station, adopts the spray gun desiliconization of inserting molten iron, and this method is the additional desiliconization as the casting house desiliconization mostly; Desiliconization agent is a host with the material that oxygen source is provided, and comprises sintering breeze, steel scale of steel rolling, commentaries on classics furnace dust powder etc., and adjusts basicity of slag and flowability with addition of an amount of lime and fluorite.The processing of dephosphorization desulfurization simultaneously is to carry out in special preprocessing station, can be divided into method in perrin process and the stove by treatment facility; Perrin process equipment has hot metal ladle and torpedo jar, and method equipment has special-purpose stove and bottom-blown converter in the stove.Remove no matter method in perrin process or the stove, common method are first desiliconization slags with molten iron, the dephosphorizing agent of jetting again carries out dephosphorization desulfurization simultaneously, and then removes the dephosphorization and desulfurization slag, and molten iron is blended into converter.Dephosphorizing agent is made up of oxygenant and fusing assistant, oxygenant has sintering breeze, steel scale of steel rolling, commentaries on classics furnace dust powder etc., fusing assistant comprises lime and fluorite, the operation of dephosphorization desulfurization simultaneously is the dephosphorizing agent dephosphorization of jetting earlier, after reaching requirement, dephosphorization stops the oxygenant of jetting, and the sweetening agent desulfurization of continuation winding-up fusing assistant or other kind (sweetening agent has calcium oxide system, calcium carbide system, magnesium system and compound sweetening agent), the molten iron phosphorus sulphur content target value behind the dephosphorization and desulfurization is decided according to the needs of institute's steelmaking kind.Each factory of the selection of sweetening agent desiliconization agent dephosphorizing agent decides according to the practical situation of oneself, and the consumption of pretreating agent is different and different according to the utilization ratio of kind, hot metal composition and the temperature of pretreating agent and pretreating agent.
Existing hot metal pretreatment device is divided into preceding casting house desiliconization facility of State of Blast Furnace and special preprocessing station facility: casting house desiliconization facility before the State of Blast Furnace, mainly be the winding-up facility of desiliconization agent, and just utilize the blast furnace existing utility as the trough or the swinging flow jet of pretreating containers; The winding-up facility of desiliconization agent comprises storage powder storehouse, the winding-up jar, spray gun, desiliconization agent transportation special purpose vehicle, and affiliated facility, spray gun is arranged on the trough or the swinging flow jet top of stokehold, storage powder storehouse, the winding-up jar is arranged in the other injecting station of the preceding casting house of State of Blast Furnace, use pipe connection between spray gun and the winding-up jar, storage powder storehouse is arranged on winding-up jar top, desiliconization agent is transported to by the injecting station by special purpose vehicle, arrive storage powder storehouse by pipe-line transportation, install to the winding-up jar from storage powder storehouse again, after the winding-up jar that installs desiliconization agent is pressurized to a set(ting)value, open the discharging by-pass valve control of winding-up jar, desiliconization agent is by pipeline and spray gun spirt molten iron.Special preprocessing station facility comprises pre-treatment workshop equipment, pretreating containers, pretreating agent winding-up facility, slagging-off facility and affiliated facility, the pre-treatment workshop equipment mainly is the pre-treatment factory building, pretreating containers has iron ladle, torpedo jar, special-purpose converter, pretreating agent winding-up facility is similar with casting house desiliconization winding-up facility before the State of Blast Furnace, the facility that removes the gred skim the method facility, drag for slag method facility, slag absorbing method facility.
The problem that existing hot metal pretreatment devices and methods therefor exists is:
Production in the pre-treatment workshop belongs to and is interrupted the property mode of production in batches.
The pre-treatment quantity of slag is big, needs repeatedly frequently to skim, and intensity is big, and holding time is long.
Be subjected to the influence of pre-treatment slag, the Intake Quantity of iron ladle reduces 1/3rd to 1/2nd.
The thermodynamic condition of dephosphorisation reaction requires low temperature, hyperoxia voltinism, and desulphurization reaction requires high temperature, low oxidative, and the metallurgical thermodynamics condition of the two is inconsistent; Carbon in the molten iron and silicon can improve the activity of sulphur in molten iron in addition, help the transfer of sulphur in slag, and the mode of dephosphorization desulfurization simultaneously is that the complete desiliconization of molten iron and deep dephosphorization and part decarburization are being carried out later on, the activity quotient of sulphur in molten iron reduces greatly, so the mode of dephosphorization desulfurization simultaneously is unfavorable for the raising of desulfuration efficiency.
The facility complexity of preprocessing station is various, and construction investment and production run expense are big.
In addition, the method among the patent No. ZL 03150583.X is: building disposes several slag parting furnaces and rotary blender with difference of altitude, the molten iron that comes out from some blast furnaces is put together carry out three and take off pre-treatment.The problem that this method exists has: need to build special pre-treatment workshop, need supporting enough handling facilities; Realize the even of hot metal composition, molten iron mixing facility will be arranged; It is a lot of that molten iron comes out to the time lengthening that enters converter from blast furnace, and hot metal temperature drop increases; Investment of pre-treatment Facilities Construction and production run expense are big.
Summary of the invention
In order to overcome the above-mentioned deficiency of existing hot metal pretreatment method and pretreatment unit thereof, the invention provides a kind of pretreated method of dephosphorization, desiliconization and desophorization for hot metal of before State of Blast Furnace, carrying out, this pretreatment method of dephosphorization, desiliconization and desophorization for hot metal be dephosphorization, desiliconization and desophorization for hot metal preprocessing process and blast furnace casting synchronously, carry out continuously, the pre-treatment slag separates discharge automatically, required facility is simple, construction investment and production run expense are little, and the hot metal pretreatment device of realizing this hot metal pretreatment method is provided simultaneously.
This pretreatment method of dephosphorization, desiliconization and desophorization for hot metal comprises desulfurization pre-treatment, desiliconization pre-treatment, dephosphorization pre-treatment, and the technical scheme that is adopted is: the iron branck-groove side that goes out before State of Blast Furnace is provided with the pretreatment reaction groove.When blast furnace casting, the molten iron of blast furnace is flowed into the pretreatment reaction groove that is divided into desulfurization pretreatment section, desiliconization pretreatment section, dephosphorization pretreatment section by skimmer successively, in desulfurization pretreatment section blowing desulfurization agent desulfurization, in the desiliconization of desiliconization pretreatment section winding-up desiliconization agent, at dephosphorization pretreatment section winding-up dephosphorizing agent dephosphorization, with agitator molten iron is stirred in the time of winding-up, the pre-treatment slag is separated by skimmer and gets rid of.The kind of pretreating agent is identical with existing known pretreating agent.
Further, this pretreatment method of dephosphorization, desiliconization and desophorization for hot metal comprises following step successively:
Molten iron during (one) with blast furnace casting flows in the pretreatment reaction groove that is arranged on before the State of Blast Furnace, the pretreatment reaction groove is divided into desulfurization pretreatment section, desiliconization pretreatment section and dephosphorization pretreatment section successively by three skimmers, flow into the desulfurization pretreatment section earlier, by the spray gun of spray gun device to molten iron spraying desulfurization spraying agent desulfurization, simultaneously, by stirring rake molten iron is carried out stirring and evenly mixing;
(2) separate desulfurization slag by the desulfurization skimmer, and desulfurization slag is discharged, be discharged to slag pot or dried pit;
(3) molten iron enters the desiliconization pretreatment section by the desulfurization skimmer, to the desiliconization of molten iron winding-up desiliconization agent, simultaneously, by stirring rake molten iron is carried out stirring and evenly mixing by the spray gun of spray gun device;
(4) separate desiliconization slag by the desiliconization skimmer, and desiliconization slag is discharged, be discharged to slag pot or dried pit;
(5) molten iron enters the dephosphorization pretreatment section by the desiliconization skimmer, to molten iron winding-up dephosphorizing agent dephosphorization, simultaneously, by stirring rake molten iron is carried out stirring and evenly mixing by the spray gun of spray gun device;
(6) separate dephosphorized slag by the dephosphorization skimmer, and dephosphorized slag is discharged, be discharged to slag pot or dried pit;
(7) molten iron flows out by the dephosphorization skimmer, is discharged to iron ladle.
This hot metal pretreatment method also can be implemented in the pretreatment reaction groove that is provided with from blast furnace place far away.
The device of preprocessed molten iron has direct relation to effects of pretreatment, hot metal pretreatment device of the present invention comprises dusting device, molten steel pretreatmenting container, spray gun device, agitator and sweep-up pipe, the discharge port of dusting device links to each other with duff pipe with the spray gun of spray gun device, the spray gun of spray gun device inserts in the molten iron of molten steel pretreatmenting container, sweep-up pipe is arranged on underground and links to each other with stokehold dedusting pipe network, the suction port of sweep-up pipe is arranged on the molten steel pretreatmenting container next door and elevates above the soil, it is characterized in that: said molten steel pretreatmenting container goes out the other long strip shape pretreatment reaction groove of iron branck-groove before being arranged on State of Blast Furnace, the pretreatment reaction groove has a box hat cell body, there are light fire brick thermofin and the refractory brick marshalling layer and the refractory casting bed of material in box hat cell body inboard, the inboard of the refractory casting bed of material forms long strip shape pretreatment reaction groove, three horizontal skimmers are being set in the pretreatment reaction groove, three skimmers are divided into the desulfurization pretreatment section successively with the pretreatment reaction groove, desiliconization pretreatment section and dephosphorization pretreatment section, each pretreatment section has a deslagging breach in the position of distance molten iron inlet or skimmer 100-500mm, one end of pretreatment reaction groove has the molten iron inlet, molten iron inlet and pretreatment reaction groove have the difference of altitude of 200-500mm, the other end has the molten iron outlet, the molten iron outlet is corresponding with the height that goes out iron branck-groove, the pretreatment reaction groove communicates with the head end that goes out iron branck-groove through the molten iron inlet, the pretreatment reaction groove communicates with the end that goes out iron branck-groove through the molten iron outlet, goes out the iron branck-groove outside at the two ends of pretreatment reaction groove a track respectively is set.
The pretreatment reaction groove with go out iron branck-groove above the heat-insulating and sealing dust cover is being set, dust cover is shaped steel and steel plate weldment, lower surface is being smeared the refractory heat-insulating material, the centre is being provided with the fire-retardent fiber felt-rug insulating sandwich, upper surface is a Checkered Steel Plate, and heat insulation skirt cover is set all around
Heat-insulating and sealing skirt cover is that the refractory heat-insulating material is smeared in the steel plate structure inboard, and heat insulation skirt cover leaves the slit apart from ground, and four angles of dedusting cover plate respectively are provided with the supporting leg that roller is installed in a lower end, and the roller setting in orbit.Be covered with at the skirt of pre-treatment slag runner one side that be changed to can left and right sides push-and-pull opening structure, as observing and cleaning slag iron uses, other three side then be stationary structure.
Pretreating agent add the implantation site each pretreatment section first three/scope in, be generally 100mm to 200mm.
Spray gun device and agitator are arranged on the dust cover, on the dust cover with on desulfurization pretreatment section, desiliconization pretreatment section and the corresponding position of dephosphorization pretreatment section patchhole is being arranged all, the patchhole of each pretreatment section place in the horizontal direction pretreatment section first three/scope in.The spray gun of spray gun device and the stirring rake of agitator stretch into patchhole.The spray gun of spray gun device is installed on the dust cover by fixed support, spray gun inserts the molten iron of pretreatment reaction groove from patchhole, the spray gun on position is generally 100mm to 200mm apart from the distance of molten iron inlet or skimmer, the degree of depth that spray gun inserts the molten iron liquid level is 0～200mm, spray gun is to make with the weldless steel tube of internal diameter 12-18mm, the spray gun of the blowing device that dephosphorization is used is the weldless steel tube of two internal diameter 12-18mm side by side, the oxygenant of weldless steel tube winding-up dephosphorizing agent wherein, the fusing assistant of another root winding-up dephosphorizing agent, oxygenant and fusing assistant are by predetermined proportion winding-up simultaneously respectively dephosphorizing agent the time in winding-up, and generally making basicity of slag is 3 to 4 scope.Agitator is after spray gun, and stirring rake inserts molten iron, generally inserts 100mm to 300mm, and stirring rake is apart from spray gun 100---400mm.
Said agitator comprises stirring rake, drivingmotor, the under drive gear group, lifting table, column and windlass, column and windlass are installed on the dust cover, column has vertical guide groove, high by 2400---3400mm, the top is installed with pulley, lifting table has a platform and a riser, at riser four guide wheels are installed, the guide wheel of lifting table is stuck in the guide groove of column, the cable wire of windlass rides over pulley, the other end is fastened the top at lifting table, and drivingmotor is installed on the lifting table, at lifting table vertical rotating shaft is installed, the driving toothed gear of under drive gear group is installed on the axle of electric motor, follower gear and stirring rake are installed in the rotating shaft, and driving toothed gear is meshed with follower gear, and the rotating speed of rotating shaft is 90～120 rev/mins.Stirring rake is on rod iron or steel pipe, welds rectangular steel plate stiffening web all around and constitutes the cross steel core, and the thick high-alumina refractory material of cast outside the cross steel core, joint flange is worn at the two ends of stirring rake, and stirring rake is connected in the rotating shaft by flange.
Said dusting device comprises a winding-up jar carrying platform, eight pulvis winding-up jars, LOAD CELLS, weight air pressure flow displaying instrument cabinet, control valve, ventpipe, duff pipe and air gas storage bag and nitrogen storage gas bags, and eight pulvis winding-ups jar are the fusing assistant of the oxygenant winding-up jar of two sweetening agents winding-ups jar, two desiliconization agents winding-ups jar, two dephosphorizing agents, two dephosphorizing agents jar of jetting.Winding-up jar carrying platform near the dust cover setting in orbit, a winding-up jar carrying platform middle part be recessed groove, and eight winding-ups jar position is being set in groove, and a pulvis winding-up jar is installed on each winding-up jar position.Below each pulvis winding-up position LOAD CELLS is being set, LOAD CELLS connects with weight air pressure flow displaying instrument cabinet with electric wire, weight air pressure flow displaying instrument cabinet is installed in pulvis winding-up jar next door, and air gas storage bag and nitrogen storage gas bag are arranged on winding-up platform next door.Air gas storage bag connects logical with two to three blast mains, the distribution of three blast mains be the oxygenant winding-up jar of two desiliconization agents winding-up jar, two dephosphorizing agents, two dephosphorizing agents the fusing assistant winding-up jar respectively each with one, the nitrogen storage gas bag connects logical with nitrogen tube, nitrogen tube and sweetening agent winding-up jar connects logical, and three blast mains and nitrogen tube are installed under the platform of jetting.
Each pulvis winding-up jar position is the steel framework that is supported by three to four LOAD CELLS, the useful volume of pulvis winding-up jar is the 3-5 cubic meter, design pressure is not less than 4Mpa, it is the cylinder of steel plate welding, top is the boss capping, the bottom is the bottom to fovea superior, top periphery evenly is being provided with minimum two hangers, offer receiving opening in the middle of the boss capping on top, the place of keeping to the side is offering pressurising and is diffusing hole (the winding-up jar stress-relief process when the winding-up jar pressurising of winding-up beginning and winding-up finish all uses this hole to realize), offer two to four discharge holes equably around the bottom, the fluidisation valve is installed under the discharge hole, the discharging stopping valve is installed under the fluidisation valve, the discharging stopping valve second line of a couplet is a Y-tube then, this Y-tube is installed with rapid-acting coupling, is connected with spray gun with the duff pipe of being with rapid-acting coupling, and a pulvis winding-up jar bottom is provided with four supporting legs.Pressurising is diffused the hole and is connected with nitrogen tube or blast main with the flexible pipe of being with rapid-acting coupling through the overhead control stopping valve of T-valve, another Y-tube and winding-up gas successively with ventpipe, a port of this Y-tube connects with the fluidisation valve through another Y-tube, and a port of the Y-tube that connects with the fluidisation valve connects through a port of the Y-tube that the winding-up stopping valve connects with the discharging stopping valve.
A pulvis winding-up jar next door is provided with a weight air pressure flow displaying instrument cabinet, weight air pressure flow displaying instrument is installed weighting display instrument and the winding-up atmospheric pressure and the flow displaying instrument of winding-up jar cashier's office in a shop, the pulvis winding-up jar that installs pretreating agent is transported on the table by automobile, with overhead traveling crane it is lifted on the winding-up jar position, pulvis winding-up jar discharge port is connected with spray gun with the winding-up tracheae with duff pipe with ventilation, just can jets.
The prominent feature of this hot metal pretreatment method be dephosphorization, desiliconization and desophorization for hot metal preprocessing process and blast furnace casting synchronously, carry out continuously; Desulfurizing iron, desiliconization, dephosphorization pre-treatment are carried out respectively in the different sections of pretreatment reaction groove, there is not the mutual conflict of metallurgical reaction thermodynamic condition, can avoid the mode of dephosphorization desulfurization simultaneously to be unfavorable for the weak point of the raising of desulfuration efficiency, help the raising of desulfuration efficiency; Pretreating agent stirs molten iron with agitator simultaneously with spray gun spirt molten iron, helps the raising of pre-treatment efficient; The facility of skimming is not set, and the pre-treatment slag separates discharge automatically, and the Intake Quantity of iron ladle is unaffected; Required facility is simple, construction investment and production run expense are little.
The pretreating reacting container of this hot metal pretreatment device goes out by the iron branck-groove before being arranged on State of Blast Furnace, three horizontal skimmers are being set in the groove, three skimmers are divided into desulfurization pretreatment section, desiliconization pretreatment section and dephosphorization pretreatment section with the pretreatment reaction groove, its advantage be can realize desulfurizing iron, desiliconization respectively, dephosphorization is pretreated carries out continuously respectively; Pretreatment reaction groove compact construction, floor space are little, the pretreatment reaction groove with go out the advantage that iron branck-groove is arranged in parallel and be, if the pretreatment reaction groove breaks down or molten iron when not needing pre-treatment, molten iron passes through from going out iron branck-groove, can guarantee the ordinary production of blast furnace; The dusting device of pretreating agent is arranged on by the pretreatment reaction groove, makes the gas usage of winding-up pretreating agent reduce to minimum; Adopt movably winding-up jar, the affiliated facilities such as factory building of storage powder storehouse and injecting station can be set, need not dispose pulvis transportation special purpose vehicle, investment and productive expense significantly reduce; The effect that agitator is set is to improve the dephosphorization, desiliconization and desophorization for hot metal reacting dynamics condition, improves dephosphorization, desiliconization and desophorization for hot metal efficient.
Description of drawings
Fig. 1 is the pretreatment reaction groove vertical view of this hot metal pretreatment device.
Fig. 2 is the vertical view of this hot metal pretreatment device.
Fig. 3 is the sectional view along A-A line among Fig. 2, and Fig. 2 amplifies relatively, 90 ° of dextrorotations.
Fig. 4 is the structure iron of whipping appts, and Fig. 3 amplifies relatively.
Fig. 5 is the sectional view along B-B line among Fig. 4.
Fig. 6 is dusting device figure, and Fig. 2 amplifies relatively.
Among the above-mentioned figure:
1, blast furnace 2, the tap drain 3 that taps a blast furnace, skimmer 4, trough
5, the desulfurization pretreating agent adds implantation site 6, molten iron inlet 7, fire-resistant bed of material cell body
8, buting iron water sand dam 9, pretreatment reaction groove 10, desulfurization pretreatment section 11, suction port
12, go out iron branck-groove 13, skimmer 14, suction port 15, desiliconization pretreatment section
16, skimmer 17, dephosphorization pretreatment section 18, suction port 19, skimmer
20, molten iron outlet 21, buting iron water sand dam 22, go out iron branck-groove 23, iron ladle
24, swinging flow jet 25, pre-processed board are answered cell body 26, slag pot
27, the dephosphorization pretreating agent adds implantation site 28, trough 29, desiliconization pretreating agent and adds the implantation site
30, deslagging breach 31, dust cover 32, agitator 33, spray gun device
34, duff pipe 35, agitator 36, spray gun device 37, duff pipe
38, agitator 39, spray gun device 40, duff pipe 41, winding-up jar carrying platform
42, sweetening agent winding-up jar 43, weight air pressure flow displaying instrument cabinet
44, sweetening agent winding-up jar 45, desiliconization agent winding-up jar 46, weight air pressure flow displaying instrument cabinet
47, the oxygenant winding-up jar of desiliconization agent winding-up jar 48, dephosphorizing agent
49, the oxygenant of weight air pressure flow displaying instrument cabinet 50, dephosphorizing agent winding-up jar
51, the fusing assistant winding-up jar of the fusing assistant of dephosphorizing agent winding-up jar 52, dephosphorizing agent
53, nitrogen tube 54, nitrogen storage gas bag 55, air gas storage bag 56, receiving opening
57, hole 58, hanger 59, supporting leg 60, discharge hole are diffused in pressurising
61, winding-up jar position 62, supporting leg 63, track 64, LOAD CELLS
65, blast main 66, blast main 67, blast main
68, heat insulation skirt cover 69, supporting leg 70, fire resistant heat preserving cell body 71, slag blocking wall
72, fixed support 73, spray gun 74, patchhole 75, stirring rake
76, molten iron 77, the refractory casting bed of material 78, fire-resistant corundum brick layer 79, steel plate groove
80, thermofin 81, ground 82, follower gear 83, lifting table
84, driving toothed gear 85, electric motor 86, pulley 87, column 88, guide wheel
89, cable wire 90, electric motor 91, windlass 92, pedestal 93, rotating shaft
94, stirring rake 95, refractory casting layer 96, cross steel core 97, interface
98, stopping valve 99, Y-tube 100, ventpipe 101, T-valve
102 Y-tubes 103, fluidisation valve 104, discharging stopping valve
105, winding-up stopping valve 106, Y-tube 107, hook
Embodiment
Describe the embodiment of this hot metal pretreatment devices and methods therefor in detail below in conjunction with embodiment and accompanying drawing thereof, but this hot metal pretreatment devices and methods therefor embodiment is not limited to following embodiment.
Hot metal pretreatment device embodiment
Fig. 1, the hot metal pretreatment device that Fig. 2 and Fig. 3 describe comprises dusting device, molten steel pretreatmenting container, spray gun device, agitator and sweep-up pipe, the discharge port of dusting device links to each other with duff pipe with the spray gun of spray gun device, the spray gun of spray gun device inserts in the molten iron of molten steel pretreatmenting container, the suction port of sweep-up pipe is arranged on the molten steel pretreatmenting container next door, it is characterized in that: said molten steel pretreatmenting container is arranged on and goes out the other long strip shape pretreatment reaction groove 9 of iron branck-groove 12 before the State of Blast Furnace, pretreatment reaction groove 9 has a pretreatment reaction cell body 25, pretreatment reaction cell body 25 is made the Rectangular Bar Of Steel board slot 79 of 9m * 2m * 1.3m by the thick steel plate of 30mm, it in the steel plate groove 79 the thick light fire brick thermofin 80 of 75mm, it in the thermofin 80 the thick fire-resistant corundum brick layer 78 of 345mm, interior is the thick refractory casting bed of material 77 of 400mm, the inboard of the refractory casting bed of material 77 forms pretreatment reaction groove 9, in pretreatment reaction groove 9 every each 2500mm length a horizontal skimmer that 400mm is wide is set, it is skimmer 13, skimmer 16 and skimmer 19, three skimmers are divided into desulfurization pretreatment section 10 with pretreatment reaction groove 9, desiliconization pretreatment section 15 and dephosphorization pretreatment section 17, each pretreatment section has a deslagging breach that communicates with trough in the position of distance molten iron inlet 6 or skimmer 200mm, as a deslagging breach 30 that communicates with trough 28 is arranged in desulfurization pretreatment section 10, other two deslagging breach communicate with trough 28, and the slag of being convenient to three pretreatment section is separated by skimmer after trough 28 flows in the slag pot 26 under the table.The left end of pretreatment reaction groove 9 has molten iron inlet 6 among Fig. 1, molten iron inlet 6 is 400mm with the difference of altitude of pretreatment reaction groove 9, molten iron inlet 6 the desulfurization pretreatment section 10 of pretreatment reaction groove 9 with go out iron branck-groove 12 and connect and lead to, the right-hand member of pretreatment reaction groove 9 has molten iron outlet 20, molten iron outlet 20 the dephosphorization pretreatment section 17 of pretreatment reaction groove 9 with go out iron branck-groove 22 and connect and lead to.Go out iron branck-groove 2 at the two ends of pretreatment reaction groove 9 and a track 63 respectively is set with the distance that goes out iron branck-groove 22 outside 1000mm.
Present embodiment to go out iron branck-groove 2 crooked to the right in Fig. 1, there is one section parallel with pretreatment reaction groove 9 to go out iron branck-groove 12, when preprocessed molten iron, with buting iron water sand dam 8 and buting iron water sand dam 21 parallel-segment being gone out iron branck-groove 12 blocks, when molten iron does not need pre-treatment, block molten iron inlet 6 with buting iron water sand dam 8, block molten iron outlet 20 with buting iron water sand dam 21, molten iron is from going out iron branck-groove 12 and going out iron branck-groove 22 outflows.The molten iron inlet 6 of present embodiment equates with the cross-sectional area that goes out iron branck-groove 12 with the cross-sectional area of molten iron outlet 20.
At pretreatment reaction groove 9 and water outlet Zhigou 2, go out iron branck-groove 12, the high position of top 800mm that goes out iron branck-groove 22 is provided with heat-insulating and sealing dust cover 31, dust cover 31 is shaped steel and steel plate weldment, lower surface is smeared the thick refractory heat-insulating material of 100mm, the centre is provided with the thick fire-retardent fiber felt-rug insulating sandwich of 100mm, upper surface is the thick Checkered Steel Plate of 5mm, heat insulation skirt cover such as heat insulation skirt cover 68 are set all around, the skirt of pre-treatment slag runner one side be covered be changed to can left and right sides push-and-pull opening structure, as observing and the use of cleaning slag iron, then fixing of other three side, heat insulation envelope skirt cover is that the thick refractory heat-insulating material of 100mm is smeared in the steel plate structure inboard, heat insulation skirt cover leaves the slit of 10mm apart from ground, four angles of dedusting cover plate 31 belows respectively are provided with the supporting leg 69 that roller is installed in a lower end, and dedusting cover plate 31 can move on track 63 by roller.
Sweep-up pipe is arranged on a side of pretreatment reaction groove 9, three pretreatment section of present embodiment are respectively disposing a sweep-up pipe, sweep-up pipe is arranged on underground and links to each other with stokehold dedusting pipe network, the diameter 1000mm of dedusting suction port, the suction port of sweep-up pipe elevates above the soil, elevate above the soil 81 as suction port 11, the flue dust during pre-treatment is taken away by the dedusting suction port.
The desulfurization pretreating agent adds implantation site 5 in the intersection of molten iron inlet 6 with desulfurization pretreatment section 10, is 100mm apart from molten iron inlet 6, and the desiliconization pretreating agent adds implantation site 29 at skimmer 13 back 150mm, and the dephosphorization pretreating agent adds implantation site 27 at skimmer 16 back 150mm.
Spray gun device and agitator are arranged on the dust cover 31, and present embodiment respectively is provided with a spray gun device and agitator in each pretreatment section of pretreatment reaction groove 9.The pretreating agent of each pretreatment section add the implantation site over against dust cover 31 on offer patchhole, as patchhole among Fig. 3 74 be positioned at the desulfurization pretreating agent add implantation site 5 directly over the position, the patchhole 74 of spray gun 73 and the stirring rake 75 of agitator 32.The installation of spray gun device is described with Fig. 3, the spray gun 73 of spray gun device 33 is installed on the dust cover 31 by fixed support 72, spray gun 73 inserts in the molten iron 76 of pretreatment reaction groove 9, the degree of depth that spray gun 73 inserts molten iron 76 is 50mm, spray gun 73 is weldless steel tubes of internal diameter 15mm, be coated with the thick high-alumina refractory material of 10mm outward, length 2000mm, wherein the spray gun of the blowing device 39 used of dephosphorization is that the weldless steel tube of two internal diameter 15mm is made side by side, the oxygenant of weldless steel tube winding-up dephosphorizing agent wherein, the fusing assistant of another root winding-up dephosphorizing agent, oxygenant and fusing assistant are in the winding-up simultaneously respectively of predetermined ratio in the time of the winding-up dephosphorizing agent, making basicity of slag is 3.5, determines that by calculating ratio is a steel rolling iron phosphorus powder 50%, lime powder 40% and fluorite powder 10%.Agitator is on dust cover 31, and stirring rake apart from spray gun 300mm, is convenient to the pulvis and the molten iron stirring and evenly mixing that spray into after spray gun.
The structure of agitator is described in conjunction with Fig. 4 with agitator 32, agitator 32 comprises stirring rake 94, drivingmotor 90, the under drive gear group, lifting table 83, column 87 and windlass 91, column 87 is fixed on the pedestal 92 with windlass 91, pedestal 92 is fixed on the dust cover 31, column 87 is channel-section steel and steel plate weldment, height is 3000mm, the top is installed with pulley 86, lifting table 83 is shaped steel and steel plate weldment, lifting table 83 has a platform and a riser, at riser four guide wheels 88 are installed, four guide wheels 88 of lifting table 83 are stuck in the channel-section steel of column 87, the cable wire 89 of windlass 91 rides over pulley 86, and the other end is fastened on the top of lifting table 83, and electric motor 85 is installed on the lifting table 83, at lifting table 83 vertical rotating shaft 93 is installed, the driving toothed gear 84 of under drive gear group is installed on the axle of electric motor 85, and follower gear 82 is installed in the rotating shaft 93, and the rotating speed of rotating shaft 93 is 90～120 rev/mins.Stirring rake 94 is on the rod iron or steel pipe of Φ 32mm, weld the wide steel plate stiffening web of the thick 30mm of 5mm all around and constitute cross steel core 96, the thick high-alumina refractory pouring layer 95 of outer cast 60mm, long is 1500mm, the transverse section is a cross shape, referring to Fig. 5, and heavy 75kg, joint flange is worn at the two ends of stirring rake 94, and stirring rake 94 is connected in the rotating shaft 93 by flange.Insert molten iron 200mm during stirring rake 94 work, corroded fusing by slag iron during stirring rake work, the height that should adjust lifting table 83 at any time guarantees the depth of penetration of stirring rake, but stirring rake is corroded when being melted to travelling car and can not descending again by slag iron, the stirring rake that should more renew, damaged stirring rake nubbin can couple together with new stirring rake and continue to use.
The composition of dusting device is seen Fig. 2 and Fig. 3, and dusting device comprises that fusing assistant winding-up jars 52, LOAD CELLS, weight air pressure flow displaying instrument cabinet, control valve, ventpipe, duff pipe and the air gas storage bag 55 of fusing assistant winding-up jars 51, the dephosphorizing agent of oxygenant winding-up jars 50, the dephosphorizing agent of oxygenant winding-up jars 48, the dephosphorizing agent of a winding-up jar carrying platform 41, sweetening agent winding-up jars 42, sweetening agent winding-up jars 44, desiliconization agent winding-up jars 45, desiliconization winding-up jars 47, dephosphorizing agent wrap 54 with nitrogen storage.A winding-up jar carrying platform 41 is arranged on the track 63 near dust cover 31, and a winding-up jar carrying platform 41 equates that with the height of dedusting cover plate 31 a winding-up jar carrying platform 41 is shaped steel and steel plate weldment, and the middle part is recessed groove.Sweetening agent winding-up jar 42, sweetening agent winding-up jar 44, desiliconization agent winding-up jar 45, desiliconization agent winding-up jar 47, the oxygenant winding-up jar 48 of dephosphorizing agent, the oxygenant winding-up jar 50 of dephosphorizing agent, the fusing assistant winding-up jar 51 of dephosphorizing agent, the fusing assistant winding-up jar 52 of dephosphorizing agent is totally eight winding-up jar positions, be installed in the groove of winding-up jar carrying platform 41, below each pulvis winding-up jar position LOAD CELLS is being set, LOAD CELLS connects with corresponding weight air pressure flow displaying instrument cabinet with electric wire, weight air pressure flow displaying instrument cabinet 43, weight air pressure flow displaying instrument cabinet 46, weight air pressure flow displaying instrument cabinet 49 is installed in relative pulvis winding-up jar next door respectively, and air gas storage bag 55 wraps 54 with nitrogen storage and is arranged on winding-up jar carrying platform 41 next doors.It is logical that air gas storage bag 55 connects with blast main 65, blast main 66 and blast main 67, and nitrogen storage is wrapped 54 and connected with nitrogen tube 53 and to lead to, and blast main 65, blast main 66, blast main 67 and nitrogen tube 53 are the steel pipe of Φ 50mm, is installed in the platform 41 times of jetting.Blast main 65 is winding-up tracheaes of desiliconization agent winding-up jar 45, desiliconization winding-up jar 47, blast main 66 is winding-up tracheaes of oxidation winding-up jars 50 of oxygenant winding-up jars 48, the dephosphorizing agent of dephosphorizing agent, blast main 67 is winding-up tracheaes of fusing assistant winding-up jars 52 of fusing assistant winding-up jars 51, the dephosphorizing agent of dephosphorizing agent, and nitrogen tube 53 is winding-up tracheaes of sweetening agent winding-up jars 42, sweetening agent winding-up jars 44.
Be example with sweetening agent winding-up jars 44 illustrates the jet composition of jar, LOAD CELLS, weight air pressure flow displaying instrument cabinet, control valve, ventpipe, duff pipe of the pulvis of dusting device in conjunction with Fig. 6.Desulfurization winding-up jar position 61 is that the diameter that is supported by three LOAD CELLS 64 is the steel framework of 1800mm, the useful volume of sweetening agent winding-up jar 44 is 4 cubic metres, design pressure 4Mpa, its structure is the garden tube of the Φ 1600mm of steel plate welding, high 2000mm, top is the ellipticalness capping, the bottom is the indent sealing cover that makes progress, and four supporting legs 59 are being set, top periphery evenly is provided with three hangers 58, offer the receiving opening 56 of Φ 150mm in the middle of the ellipticalness capping on top, the place of keeping to the side offers the pressurising of Φ 50mm and diffuses hole 57, offer the discharge hole 60 of four Φ 32mm around the bottom equably, discharge hole is installed with fluidisation valve 103 60 times, and the fluidisation valve is installed with discharging stopping valve 104 103 times, and discharging stopping valve 104 second lines of a couplet are followed Y-tube 106, Y-tube 106 is installed with rapid-acting coupling, is connected with spray gun 73 with the soft duff pipe 34 of being with rapid-acting coupling.Pressurising is diffused hole 57 usefulness ventpipes and is with the flexible pipe of rapid-acting coupling to connect with nitrogen tube 53 through total stopping valve 98 usefulness of control of T-valve 101, Y-tube 99 and winding-up gas successively, another port of Y-tube 99 connects with fluidisation valve 103 through Y-tube 102, and another port of Y-tube 102 connects with a port of Y-tube 106 through winding-up stopping valve 105.Weight air pressure flow displaying instrument cabinet 43 is arranged on the place of the left side 1000mm of sweetening agent winding-up jar 44.
Present embodiment is disposing three sweetening agent winding-up jars, wherein two are placed on the winding-up jar position, and another one is placed on the table and migrates as week, in winding-up earlier with sweetening agent winding-up jar 42 winding-ups, after sweetening agent winding-up jar 42 has been jetted, then blow by sweetening agent winding-up jar 44.The slack tank of pretreating agent of having jetted is transported to the pretreating agent supply station by automobile and carries out tinning.Three desiliconization agents winding-ups jar also are being set simultaneously, the oxygenant winding-up jar of three dephosphorizing agents is being set, the fusing assistant winding-up jar of three dephosphorizing agents is being set.
Each pulvis winding-up jar next door respectively is provided with a weight air pressure flow displaying instrument cabinet, disposing weight air pressure stream amount display instrument cabinet 43 as sweetening agent winding-up jar 42 and sweetening agent winding-up jar 44, weight air pressure flow displaying instrument is installed weighting display instrument and the winding-up atmospheric pressure and the flow displaying instrument of winding-up jar cashier's office in a shop, the pulvis winding-up jar that installs pretreating agent is transported on the table by automobile, with overhead traveling crane it is lifted on winding-up jar position as the winding-up jar position 61, pulvis winding-up jar discharge port is connected with the winding-up stopping valve with ventpipe, duff pipe is connected with spray gun, just can jet.
Dust cover 31 is linked together with winding-up jar carrying platform 41 a usefulness hook 107, comes move left and right by the windlass that is arranged on the table by rope traction.
Introduce the process of winding-up below, all winding-up operate control valve doors all adopt manual operation, nitrogen (desulfurization) and air (desiliconization, dephosphorization) winding-up air pressure is 0.2～0.3MPa, during molten iron enters pretreatment reaction groove 9 during blast furnace casting desulfurization pretreatment section 10 about blowing desulfurization agent ton iron 10kg, about desiliconization pretreatment section 15 winding-up desiliconization agent ton iron 35kg, about dephosphorization pretreatment section 17 winding-up dephosphorizing agent ton iron 50kg, carry out three and take off pre-treatment, pretreated molten iron enters iron ladle 23 by swinging flow jet 24, the pre-treatment slag separates after go into slag ladle 26 through skimmer, the injecting velocity of pretreating agent is adjusted at any time according to the consumption of molten iron flow velocity and pretreating agent, the molten iron flow velocity is determined by being arranged on iron ladle 23 following LOAD CELLS, the consumption of pretreating agent is determined by calculating according to the composition of molten iron, every each certain hour carries out sample examination before molten iron enters pretreatment reaction groove 9 and after flowing out pretreatment reaction groove 9, general 10 minutes, sample examination result according to molten iron, as the foundation of adjusting the pretreating agent consumption, winding-up time control powder process agent winding-up tank pressure is a steady state value, the injecting velocity that is every spray gun of may command is a steady state value, this value is determined by test, by adjusting total injecting velocity that the quantity of using spray gun controls pretreating agent, can use 1～4 spray gun to jet simultaneously.
Hot metal pretreatment method embodiment
This hot metal pretreatment embodiment adopts the embodiment of above-mentioned hot metal pretreatment device to carry out three to take off processing.
The starting condition of this hot metal pretreatment embodiment
400 cubic metres of furnace volumes, 1.5～2.5 tons/minute of the speed of tapping a blast furnace, molten iron temperature is not less than 1450 ℃, and the pig iron is siliceous, phosphorus, sulfur content are not more than 0.50%, 0.10%, 0.05% respectively.
The pretreating agent kind
Desiliconization agent: sintering breeze (grade is not less than 50%), consumption 35kg/t.
Dephosphorizing agent: steel scale of steel rolling powder 50%, lime powder 40% and fluorite powder 10%, consumption 50kg/t.
Sweetening agent: lime powder 95% and fluorite powder 5%, consumption 10kg/t.
The granularity of desiliconization agent, sweetening agent and dephosphorizing agent is for being not more than 1mm.
Pretreating effect: three the pig iron after taking off are siliceous, phosphorus, sulfur content are not more than 0.01%.
This pretreatment method of dephosphorization, desiliconization and desophorization for hot metal embodiment comprises following step successively:
(1) blocks going out iron branck-groove 12 with buting iron water sand dam 8 and buting iron water sand dam 21, allow blast-melted flow to be arranged on to go out before the State of Blast Furnace iron branck-groove 12 other be divided into three sections pretreatment reaction groove 9 by three skimmers, flow into desulfurization pretreatment section 10 earlier, by the molten iron spraying desulfurization spraying agent desulfurization of the spray gun of spray gun device 33 to desulfurization pretreatment section 10, simultaneously, start agitator 32, stirring rake by agitator 32 carries out stirring and evenly mixing to molten iron, the molten iron of present embodiment is 1500kg/ minute through the flow of pretreatment reaction groove 9, nitrogen-blow pressure is 0.2MPa, sweetening agent winding-up amount is 15kg/ minute, the rotating speed of stirring rake is 90 rev/mins, inserts molten iron 200mm during stirring rake work;
(2) separate desulfurization slag by desulfurization skimmer 13, and desulfurization slag is discharged to slag pot 26 from trough 28;
(3) molten iron enters desiliconization pretreatment section 15 by desulfurization skimmer 13, in desiliconization pretreatment section 15, by the molten iron winding-up desiliconization agent desiliconization of the spray gun of spray gun device 36 to desiliconization pretreatment section 15, simultaneously, start agitator 35, molten iron is carried out stirring and evenly mixing by the stirring rake of agitator 35, desiliconization agent winding-up amount 52kg/ minute, the atmospheric pressure of winding-up is 0.24MPa, and the rotating speed of stirring rake is 100 rev/mins, inserts about molten iron 200mm during stirring rake work;
(4) separate desiliconization slag by desiliconization skimmer 16, and desiliconization slag is discharged to slag pot 26 from trough 28;
(5) molten iron enters dephosphorization pretreatment section 17 by desiliconization skimmer 16, in dephosphorization pretreatment section 17, by the spray gun of spray gun device 39 molten iron winding-up dephosphorizing agent dephosphorization to dephosphorization pretreatment section 17, simultaneously, start agitator 38, molten iron is carried out stirring and evenly mixing by the stirring rake of agitator 38, the winding-up amount of dephosphorizing agent 75kg/ minute, the atmospheric pressure of winding-up is 0.3MPa, and the rotating speed of stirring rake is 120 rev/mins, inserts about molten iron 200mm during stirring rake work.
(6) separate dephosphorized slag by dephosphorization skimmer 19, and dephosphorized slag is discharged to slag pot 26;
(7) molten iron flows to out iron branck-groove 22 by dephosphorization skimmer 19, flows into iron ladle 23 through going out iron branck-groove 22 with swinging flow jet 24 again.
Flue dust during pre-treatment is taken away by suction port.
The switch and the operation of each valve when winding-up being described in conjunction with Fig. 6:
The winding-up beginning:
(1) close discharging stopping valve 104, winding-up stopping valve 105, T-valve 101 is the state that by-pass port closes, straightthrough port is logical.
(2) open the total stopping valve 98 of control of winding-up gas, this moment winding-up jar is the pressurising process.When injection tank pressure reaches 0.1Mpa, open winding-up stopping valve 105, discharging stopping valve 104, winding-up beginning this moment.
Finish winding-up:
(1) closes discharging stopping valve 104, close winding-up stopping valve 105 5 seconds of delaying time.
(2) close the winding-up gas the total stopping valve 98 of control.
T-valve 101 is got to the logical state of inlet mouth pass, by-pass port and winding-up jar, and the winding-up jar is a stress-relief process, and this moment, winding-up finished.
Above-mentioned hot metal pretreatment method embodiment also can implement in the pretreatment reaction groove that is provided with from blast furnace place far away.
Claims (7)
1, a kind of hot metal pretreatment method, it comprises desulfurization pre-treatment, desiliconization pre-treatment, dephosphorization pre-treatment, it is characterized in that it takes successively following step:
Molten iron during (one) with blast furnace casting flows in the pretreatment reaction groove that is arranged on before the State of Blast Furnace, the pretreatment reaction groove is divided into desulfurization pretreatment section, desiliconization pretreatment section and dephosphorization pretreatment section successively by three skimmers, flow into the desulfurization pretreatment section earlier, by the spray gun of spray gun device to molten iron spraying desulfurization spraying agent desulfurization, simultaneously, by stirring rake molten iron is carried out stirring and evenly mixing;
(2) separate desulfurization slag by the desulfurization skimmer, and desulfurization slag is discharged;
(3) molten iron enters the desiliconization pretreatment section by the desulfurization skimmer, to the desiliconization of molten iron winding-up desiliconization agent, simultaneously, by stirring rake molten iron is carried out stirring and evenly mixing by the spray gun of spray gun device;
(4) separate desiliconization slag by the desiliconization skimmer, and desiliconization slag is discharged;
(5) molten iron enters the dephosphorization pretreatment section by the desiliconization skimmer, to molten iron winding-up dephosphorizing agent dephosphorization, simultaneously, by stirring rake molten iron is carried out stirring and evenly mixing by the spray gun of spray gun device;
(6) separate dephosphorized slag by the dephosphorization skimmer, and dephosphorized slag is discharged;
(7) molten iron flows out by the dephosphorization skimmer.
2, realize the hot metal pretreatment device of claim 1 hot metal pretreatment method, it comprises dusting device, molten steel pretreatmenting container, spray gun device, agitator and sweep-up pipe, the discharge port of dusting device links to each other with duff pipe with the spray gun of spray gun device, the spray gun of spray gun device inserts in the molten iron of molten steel pretreatmenting container, the suction port of sweep-up pipe is arranged on the molten steel pretreatmenting container next door and elevates above the soil, it is characterized in that: said molten steel pretreatmenting container goes out the other long strip shape pretreatment reaction groove of iron branck-groove before being arranged on State of Blast Furnace, three horizontal skimmers are being set in the pretreatment reaction groove, three skimmers are divided into the desulfurization pretreatment section successively with the pretreatment reaction groove, desiliconization pretreatment section and dephosphorization pretreatment section, each pretreatment section has a deslagging breach in the position of distance molten iron inlet or skimmer 100-500mm, one end of pretreatment reaction groove has the molten iron inlet, molten iron inlet and pretreatment reaction groove have the difference of altitude of 200-500mm, the other end has the molten iron outlet, the pretreatment reaction groove communicates with the head end that goes out iron branck-groove through the molten iron inlet, the pretreatment reaction groove communicates with the end that goes out iron branck-groove through the molten iron outlet, goes out the iron branck-groove outside at the two ends of pretreatment reaction groove a track respectively is set; The pretreatment reaction groove with go out iron branck-groove above the heat-insulating and sealing dust cover is being set, four angles of dust cover respectively are provided with the supporting leg that roller is installed in lower end, the roller setting in orbit; Spray gun device and agitator are arranged on the dust cover, on the dust cover with on desulfurization pretreatment section, desiliconization pretreatment section and the corresponding position of dephosphorization pretreatment section patchhole are being arranged all, and the spray gun of spray gun device and the stirring rake of agitator stretch into patchhole; The spray gun of spray gun device is installed on the dust cover by fixed support, spray gun inserts in the molten iron of pretreatment reaction groove, the spray gun on position is 100mm to 200mm apart from the distance of molten iron inlet or skimmer, the degree of depth that spray gun inserts the molten iron liquid level is 0～200mm, spray gun is to make with the weldless steel tube of internal diameter 12-18mm, the spray gun of the blowing device that dephosphorization is used is the weldless steel tube of two internal diameter 12-18mm side by side, the oxygenant of weldless steel tube winding-up dephosphorizing agent wherein, the fusing assistant of another root winding-up dephosphorizing agent, stirring rake inserts molten iron 100mm to 300mm, agitator is after spray gun, apart from spray gun 100---400mm; Said agitator comprises stirring rake, drivingmotor, under drive gear group, lifting table, column and windlass, column and windlass are installed on the dust cover, drivingmotor is installed on the lifting table, at lifting table vertical rotating shaft is installed, the driving toothed gear of under drive gear group is installed on the axle of electric motor, and follower gear and stirring rake are installed in the rotating shaft; Said dusting device comprises a winding-up jar carrying platform, eight pulvis winding-up jars, LOAD CELLS, weight air pressure flow displaying instrument cabinet, control valve, ventpipe, duff pipe and air gas storage bag and nitrogen storage gas bags, and eight pulvis winding-ups jar are the fusing assistant of the oxygenant winding-up jar of two sweetening agents winding-ups jar, two desiliconization agents winding-ups jar, two dephosphorizing agents, two dephosphorizing agents jar of jetting; Winding-up jar carrying platform near the dust cover setting in orbit, a winding-up jar carrying platform middle part be recessed groove, and eight winding-ups jar position is being set in groove, and a pulvis winding-up jar is installed on each winding-up jar position; Below each pulvis winding-up position LOAD CELLS is being set, LOAD CELLS connects with weight air pressure flow displaying instrument cabinet with electric wire, weight air pressure flow displaying instrument cabinet is installed in pulvis winding-up jar next door, and air gas storage bag and nitrogen storage gas bag are arranged on winding-up platform next door; Air gas storage bag connects with two to three blast mains, the fusing assistant winding-up of the oxygenant winding-up of blast main and the winding-up of two desiliconization agents jar, two dephosphorizing agents jar, two dephosphorizing agents jar connects, the nitrogen storage gas bag connects with nitrogen tube, nitrogen tube connects with sweetening agent winding-up jar, and blast main and nitrogen tube are installed under the winding-up platform; Each pulvis winding-up jar position is the steel framework that is supported by three to four LOAD CELLS, the useful volume of pulvis winding-up jar is the 3-5 cubic meter, it is the cylinder of steel plate welding, top is the boss capping, the bottom is the bottom to fovea superior, and top periphery evenly is being provided with minimum two hangers, offers receiving opening in the middle of the boss capping on top, the place of keeping to the side is offering pressurising and is diffusing the hole, offers two to four discharge holes around the bottom equably.
3, hot metal pretreatment device according to claim 2, it is characterized in that: under the discharge hole of pulvis winding-up jar, the fluidisation valve is installed, the discharging stopping valve is installed under the fluidisation valve, the discharging stopping valve second line of a couplet is the 1st Y-tube (106) then, the 1st Y-tube (106) is installed with rapid-acting coupling, duff pipe (34) with band rapid-acting coupling is connected with spray gun (37), and a pulvis winding-up jar bottom is provided with four supporting legs; Pressurising is diffused hole (57) and is connected with nitrogen tube (53) or blast main with the flexible pipe of being with rapid-acting coupling through the overhead control stopping valve (98) of T-valve (101), the 2nd Y-tube (99) and winding-up gas successively with ventpipe, a port of the 2nd Y-tube (99) connects with fluidisation valve (103) through the 3rd Y-tube (102), and a port of the 3rd Y-tube (102) that connects with the fluidisation valve connects with a port of the 1st Y-tube (106) through winding-up stopping valve (105).
4, according to claim 2 or 3 described hot metal pretreatment devices, it is characterized in that: said dust cover is shaped steel and steel plate weldment, lower surface is being smeared the refractory heat-insulating material, the centre is being provided with the fire-retardent fiber felt-rug insulating sandwich, upper surface is a Checkered Steel Plate, around dust cover heat insulation skirt cover is set, and heat insulation skirt cover is that the refractory heat-insulating material is smeared in the steel plate structure inboard, heat insulation skirt cover leaves the slit apart from ground, is covered with at the skirt of slag runner one side that be changed to can left and right sides push-and-pull opening structure.
5, hot metal pretreatment device according to claim 4, it is characterized in that: column has vertical guide groove, high by 2400---3400mm, the top is installed with pulley, lifting table has a platform and a riser, at riser four guide wheels is installed, and the guide wheel of lifting table is stuck in the guide groove of column, the cable wire of windlass rides over pulley, and the other end is fastened the top at lifting table.
6, hot metal pretreatment device according to claim 4, it is characterized in that: stirring rake is on rod iron or steel pipe, weld rectangular steel plate stiffening web all around and constitute the cross steel core, the thick high-alumina refractory material of cast outside the cross steel core, joint flange is worn at the two ends of stirring rake.
7, hot metal pretreatment device according to claim 4, it is characterized in that: the pretreatment reaction groove has a box hat cell body, there are light fire brick thermofin and the refractory brick marshalling layer and the refractory casting bed of material in box hat cell body inboard, and the inboard of the refractory casting bed of material forms long strip shape pretreatment reaction groove.
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| CNB2007100615913A CN100572565C (en) | 2007-03-14 | 2007-03-14 | Hot metal pretreatment method and pretreatment unit thereof |
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| CN109468426A (en) * | 2018-11-30 | 2019-03-15 | 钢铁研究总院 | The method of hot-metal bottle desulfurization desiliconization and the low-phosphorous sulphur steel of converter less-slag melting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101805818B (en) * | 2010-04-01 | 2012-05-30 | 钢铁研究总院 | Method for removing titanium from ladle by using stirring method |
| CN103215404B (en) * | 2012-01-18 | 2015-06-17 | 中钢设备有限公司 | Molten iron pretreatment apparatus and method thereof |
| CN104480251B (en) * | 2014-12-05 | 2016-03-30 | 中冶京诚工程技术有限公司 | The pretreatment unit of molten iron simultaneously desulfurization, desiliconization, dephosphorization and application and smelting method |
| CN104928430B (en) * | 2015-05-22 | 2017-08-15 | 江苏嘉耐高温材料有限公司 | Store iron formula iron tap channel and carry out the pre- dephosphorization feeding machine of molten iron and its pre-dephosporizing method |
| JP6521177B2 (en) * | 2016-04-25 | 2019-05-29 | 日本製鉄株式会社 | Method and apparatus for desulfurizing molten iron |
| CN107790649B (en) * | 2016-08-31 | 2019-06-25 | 鞍钢股份有限公司 | A kind of method that molten iron is directly casting continuously to form steel billet |
| CN106755740B (en) * | 2016-12-12 | 2019-09-20 | 鞍山市和丰耐火材料有限公司 | A kind of desulfurizing iron rotary blowing equipment and blowing method |
| CN111041156A (en) * | 2019-12-26 | 2020-04-21 | 河钢股份有限公司承德分公司 | Single-station molten iron treatment process |
| CN115505668A (en) * | 2022-11-23 | 2022-12-23 | 华北理工大学 | Movable molten iron desiliconizing and dephosphorizing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109468426A (en) * | 2018-11-30 | 2019-03-15 | 钢铁研究总院 | The method of hot-metal bottle desulfurization desiliconization and the low-phosphorous sulphur steel of converter less-slag melting |
| CN109468426B (en) * | 2018-11-30 | 2020-10-16 | 钢铁研究总院 | Method for desulfurizing and desiliconizing molten iron tank and smelting low-phosphorus and sulfur steel with less slag of converter |
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