CN1057487A - The pre-reducing furnace of iron ore senelting reduction - Google Patents
The pre-reducing furnace of iron ore senelting reduction Download PDFInfo
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- CN1057487A CN1057487A CN91103967A CN91103967A CN1057487A CN 1057487 A CN1057487 A CN 1057487A CN 91103967 A CN91103967 A CN 91103967A CN 91103967 A CN91103967 A CN 91103967A CN 1057487 A CN1057487 A CN 1057487A
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Abstract
The pre-reducing furnace of senelting reduction, the fluidisation prereduction chamber that adds iron ore and carry out prereduction is arranged at top, the gas blast chamber of introducing reducing gas is arranged at the bottom, and two Room separate with divider, also are provided with from fluidisation prereduction chamber and draw off the discharge tube of pre-reduction of ore.Divider then comprises the body of refractory materials system, the metal sheet on being located at the bottom of the body, the nozzle by body and metal sheet, inserts metal tube in the nozzle and the cooling tube that links to each other with metal sheet.Can be provided with one under the metal sheet for gas flow provides the metal box of passage, and can establish a base plate that allows nozzle pass through that separates with it.The rigidity slab that flame retardant coating is arranged above divider can comprise.
Description
The present invention relates to a kind of pre-reducing furnace of an iron ore senelting reduction.
The senelting reduction of iron ore comprises the pre-reducing furnace of a kind of reduction furnace for smelting and a kind of fluidized bed type.Plant waste gas that reduction furnace for smelting generates thus and promptly be used for iron ore in fluidisation and this pre-reducing furnace fluidized-bed of reduction.This fluidized-bed is preferably got the sophisticated bubbling type of the sort of technology, can prevent that ore is because of preheating and reduction fragmentation.One divider is arranged in the pre-reducing furnace, and the latter has many nozzles that are used for jet flow stream.Iron ore adds in the prereduction chamber of this divider top formation.Reducing gas from reduction furnace for smelting is introduced in the blast chamber of divider below.This reducing gas promptly blasts in the prereduction chamber of divider top by the nozzle of divider.The reducing gas that drum is sent in the prereduction chamber just forms fluidized-bed, and iron ore is promptly in prereduction and preheating wherein take place.
As for pre-reducing furnace, contained dust adhesion just becomes a big problem in the reducing gas on divider.Contain a large amount of dust in the waste gas that reduction furnace for smelting produces, under most of situations, contained granularity is that 10 microns and littler dust are to be removed by tornado dust collector or other suction cleaner in this kind gas.This reducing gas that contains fine dust has entered does not remove fine dust in the pre-reducing furnace, and this dust contains a large amount of Na, K and other basic cpd and S, and invests in this reducing gas in the temperature more than 900 ℃.Because such adhesion properties, be incorporated into bottom and nozzle inboard that this kind dust in the pre-reducing furnace just adheres to divider, and especially can adhere on the inboard of nozzle firmly, this is that the result makes the flow velocity of gas in nozzle up to 100m/sec owing to be incorporated into the cause that this this dust of blast chamber concentrates by nozzle the time.Adherent dust is piled up gradually, has hindered the smooth flow of reducing gas, has also hindered the suitable fluidized-bed of form simultaneously.
The object of the present invention is to provide and a kind ofly can effectively prevent the pre-reducing furnace of dust adhesion on divider.
For achieving the above object, the pre-reducing furnace of senelting reduction provided by the present invention comprises:
Fluidisation prereduction chamber is installed in the top of pre-reducing furnace, in wherein add iron ore and to prereduction;
The gas blast chamber be installed in the bottom of pre-reducing furnace, and reducing gas is sent into promptly wherein;
Divider makes aforesaid fluidisation prereduction chamber separate with the gas blast chamber;
Discharge tube is used for drawing off from described fluidisation prereduction chamber the ore of prereduction; And
Above-mentioned divider then comprises:
One refractory aggregate;
One is installed in the metal sheet on this body bottom;
By the plurality of nozzles of this body and metal sheet, and
Be connected to the some cooling tubes on this metal sheet.
Another kind of mode is, this divider can comprise the body of a refractory materials system, a metal sheet that is installed on this body bottom, some nozzles by this body and metal sheet, insert the number of metal pipe in these nozzles, and one be installed in this metal sheet below and be provided with and allow the metal box of the passage that gas stream crosses, and this metal box then has a collection of nozzle of following said nozzle.
In another kind assembling mode, this divider can comprise the body of a refractory materials system, a metal sheet that is installed on this body bottom, some nozzles by this body and metal sheet, insert first metal tube in these nozzles, be connected to a collection of cooling tube of this metal sheet, with the separated base plate of the metal sheet of below, and the second batch of metal tube that is connected to first metal tube lower end, the lower surface of then sensible this base plate in their lower end, said metal sheet, base plate and the second batch of metal tube then define one by they around the chamber.
In another assembling mode, this divider can comprise the body of a refractory materials system, be installed in the metal sheet under this body, a collection of nozzle by this body and metal sheet, insert first metal tube of this batch nozzle, be connected to a collection of cooling tube of this metal sheet, be fixed on a base plate of this metal sheet below, be connected to second batch of metal tube of first metal tube lower end, their lower end is the lower surface of sensible this base plate then.
Also have a kind of assembling mode, divider wherein can comprise that one has and can allow the rigidity slab of the passage that cooling fluid flows through, and this piece slab is provided with and leads to first nozzle of getting vertical direction; Comprise that also one is installed in the flame retardant coating of slab top, then be provided with second batch of nozzle that diameter increases gradually towards the top on this flame retardant coating.
Fig. 1 is the vertical cross section of the pre-reducing furnace bottom in the most preferred embodiment 1;
Fig. 2 is the vertical cross section of divider in the most preferred embodiment 1;
Fig. 3 constitutes the metal sheet in the most preferred embodiment 1 and the orthographic plan of cooling tube;
Fig. 4 is the vertical cross section of one second kind of divider in the most preferred embodiment;
Fig. 5 is the vertical cross section of the third divider in the most preferred embodiment 1;
Fig. 6 is the vertical cross section that has the pre-reducing furnace bottom of washing unit in the most preferred embodiment 1;
Fig. 7 is the fragmentary cross-sectional view of the washing unit water intaking plain cloth in the most preferred embodiment 1 when putting;
Fig. 8 is the vertical cross section of another kind of divider in the most preferred embodiment 1;
Fig. 9 is the vertical cross section of pre-reducing furnace bottom in the most preferred embodiment 2;
Figure 10 is the vertical cross section of divider in the most preferred embodiment 2;
Figure 11 constitutes the metal sheet in the most preferred embodiment 2 and the orthographic plan of cooling tube;
Figure 12 is the horizontal sectional drawing of the metal box of the divider in the most preferred embodiment 2;
Figure 13 is the vertical cross section of second kind of divider in the most preferred embodiment 2;
Figure 14 is the vertical cross section of the third divider in the most preferred embodiment 2;
Figure 15 is the vertical cross section that has the pre-reducing furnace bottom of washing unit in the most preferred embodiment 2;
Figure 16 is the fragmentary cross-sectional view of the washing unit water intaking plain cloth in the most preferred embodiment 2 when putting;
Figure 17 is the vertical cross section of pre-reducing furnace bottom in the most preferred embodiment 3;
Figure 18 is a vertical cross section, partly shows the substructure of understanding the divider in the most preferred embodiment 3;
Figure 19 constitutes the metal sheet of divider in the most preferred embodiment 3 and the orthographic plan of cooling tube;
Figure 20 is a vertical cross section, partly shows second kind of substructure of divider in the bright most preferred embodiment 3;
Figure 21 is the vertical cross section of divider in the most preferred embodiment 3;
Figure 22 is the vertical cross section of second kind of divider in the most preferred embodiment 3;
Figure 23 is a vertical cross section, partly shows the third substructure of divider in the bright most preferred embodiment 3;
Figure 24 is the vertical cross section that has the pre-reducing furnace bottom of washing unit in the most preferred embodiment 3;
Figure 25 is that the fragmentary cross-sectional view when disposing is put down in the washing unit water intaking in the most preferred embodiment 3;
Figure 26 is a vertical cross section, partly shows the 4th kind of substructure of the divider in the bright most preferred embodiment 3;
Figure 27 is a vertical cross section, partly shows the 5th kind of substructure of the divider in the bright most preferred embodiment 3;
Figure 28 is the vertical cross section of second kind of pre-reducing furnace bottom in the most preferred embodiment 4;
Figure 29 is the vertical cross section of divider in the most preferred embodiment;
Figure 30 is the vertical cross section that constitutes the slab of this divider in the most preferred embodiment 4;
Figure 31 is the vertical cross section of the third pre-reducing furnace bottom in the most preferred embodiment 4;
Figure 32 is the vertical cross section that has the pre-reducing furnace bottom of washing unit in the most preferred embodiment 4;
Figure 33 is that the fragmentary cross-sectional view when disposing is put down in the washing unit water intaking in the most preferred embodiment 4;
Figure 34 is the synoptic diagram of the present invention's senelting reduction.
Fig. 1 to 3 has shown a most preferred embodiment of the present invention.Reference number 5 refers to a pre-reducing furnace body of heater, and reference number 8 refers to that one separates the divider of this body of heater.The top of this stove constitutes a prereduction chamber 6 above divider 8, and its bottom constitutes a gas blast chamber 7 below this divider.This blast chamber 7.This blast chamber 7 is equipped with gas blast entrance 9, and the latter is connected to a feed tube 10 of drawing from reduction furnace for smelting.
The present invention can not only be applied to as shown in Figure 1 with its upper surface along cone surface towards the divider that central part tilts, also be applicable to divider with horizontal upper surface.Though the section form of cooling tube and floor plan do not limit in the foregoing description, cooling tube is to get suitable configuration.
In divider shown in Figure 4, cooling tube is configured to not outstanding from the bottom of metal sheet.The overwhelming majority that constitutes each cooling tube 17 of divider 8a is embedded among the body 11, and the bottom of cooling tube 17 flushes with the basal surface of metal sheet 12.The configuration of others identical with shown in Fig. 1 shows identical or suitable parts with identical reference number among two figure.The layout of cooling tube 17 is not subjected to restriction embodiment illustrated in fig. 4.The bottom of cooling tube 17 can engage with the upper surface of metal sheet 12, maybe can engage by web member.
In most preferred embodiment shown in Figure 5, ore spigot discharge 13 is positioned at the side of divider 8b.Divider 8b gets the structure that upper surface has a down dip towards the ore spigot discharge.The configuration of others shows identical or suitable parts with identical reference number with identical shown in Fig. 4 among two figure.In divider shown in Figure 5, cooling tube 17 and the structure shown in metal sheet 12 desirable Fig. 1, promptly cooling tube 17 can be configured to make its upper part to be embedded in the body 11.
In Fig. 6 and 7 illustrated embodiments, wash tube is installed under the divider, the configuration of this divider is identical with shown in Fig. 1 then.Below divider, two wash tubes 18 are mounted to horizontal movable manner, make the ore spigot discharge mediate.Be embedded with sleeve pipe 20 on the sidewall by body of heater 5.18 of gas injection tubes can free in and out blast chamber 7 through this sleeve pipe 20.For wash tube 18 is moved horizontally, outside body of heater 5, be provided with driving mechanism 21, this driving mechanism for example is to be made of the reciprocal chain that is locked on this body of heater outside one protuberance.Like this, the to-and-fro movement of this chain just drives wash tube 18 and debouches blast chamber 7 by sleeve pipe 20.Connecting the air-supply duct 24 that leads to gas source 23 at tail end from the extended wash tube 18 of body of heater.Be provided with the desirable driving mechanism that can be not shown for this reason of valve 25 wash tubes 18 drives and the structure of rotating around himself axis at the middle part of air-supply duct 24.This this wash tube can be installed on the stove with divider shown in Fig. 4 and 5.
In above-mentioned most preferred embodiment, also can in the body 11 of refractory materials system, embed other cooling tube in described cooling tube 17 tops and replace cooling tube 17.As shown in Figure 8, these a few cooling tubes can directly join on the metal tube 16, perhaps are connected on metal tube 16 or the metal sheet 12 by web member.
The working condition of the reduction furnace of elucidated hereinafter most preferred embodiment 1.Make cooling fluid flow into the cooling tube 17 that constitutes divider 8,8a or 8b.The cooling fluid that is used for this stove is water or nitrogen, but the liquid of water and so on is ideal.This cooling fluid is just connecting metal sheet 12 coolings of cooling tube 17.Subsequently, be inserted in the interior just refrigeration of metal tube 16 of nozzle via metal sheet 12.Metal sheet 12 coolings will reduce the temperature of dispenser bottom and each nozzle inboard after also making metal tube 16 coolings thereupon, and the result is condensed the dust in the reducing gas that is attached on dispenser bottom and each the nozzle inboard rapidly, is easy to remove.In this most preferred embodiment, the upper strata of divider 8 does not add cooling, and this is owing to be attached to any dust in divider 8 top layers and nozzle 15 exits, can be removed rapidly by the strong movement of fluidizing ore grain.Like this, on the inboard of the bottom of divider and nozzle, just almost no longer include dust adhesion.Can prevent the heat radiation on fluidized-bed so the top layer and lower the temperature without refrigerative divider top layer.
In most preferred embodiment shown in Fig. 6 and 7,, easily remove by wash tube 18 jet flow stream if there is dust to be attached to dispenser bottom or nozzle entrance.Jet pipe 18 is removed the outside of stove usually.When gas sprays to the bottom of divider 8 by gas ejection ports 19, promptly wash tube is pushed in the blast chamber 7 by driving mechanism 21.
In most preferred embodiment shown in Fig. 4 and 5, because cooling tube is installed according to the mode of not dashed forward from metal sheet 12 bottoms, reducing gas is difficult for becoming turbulent flow, thereby the degree of adhesion of dust is lighter than the situation in the most preferred embodiment shown in Figure 1.Generally, the traditional divider that constitutes with refractory materials merely has the thickness of about 700mm.Divider of the present invention is provided with metal sheet 12 and cooling tube 17 as reinforcement.This divider has very high intensity owing to having carried out cooling, thereby its thickness can reduce to about 200mm.So, reducing gas and this nozzle 15 inboard contacted areas by nozzle 15, just more than with the contacted area of traditional dispensers that only constitutes by refractory materials be little, thereby the temperature of this reducing gas by nozzle the time descends can bring what problem hardly.
Fig. 9 to 12 illustrates most preferred embodiment 2 of the present invention.Reference number 5 refers to prereduction body of heater 5, and reference number 8 refers to separate the divider of this body of heater.The top above divider 8 of this stove constitutes a prereduction chamber 6, and its bottom below this divider then constitutes a gas blast chamber 7, and the latter is provided with gas blast entrance 9, and this enters the mouth by being connected to the air-supply duct 10 of drawing from reduction furnace for smelting.
Above-mentioned divider 8 has many perpendicular nozzle 15, this divider 8 comprises a body 11 by refractory materials system, be installed on metal sheet 12 on these body 11 bottoms, the metal tube 16 of intercalation in nozzle 15, be used for for cooling fluid mobile cooling tube 17 along the installing of body 11 bottoms, and a metal box 31 that is installed in metal sheet 12 belows, then have on this metal sheet to be used for the passage of cooling gas.Metal sheet 12 fixedly is assemblied on the body 11 and is covered the whole bottom of this body 11.Metal sheet 12 processes the aperture at the position that forms nozzle.Metal tube 16 is inserted in the nozzle 15a.The tail end of this metal tube 16 joins on the periphery in this aperture through welding or other method.Bottom along body 11 is provided with a collection of cooling tube 17 with being arranged parallel to each other, and the latter longitudinally is bonded on the metal sheet 12 through welding or other method.In this most preferred embodiment, the first half of each cooling tube 17 is embedded in the body 11.Like this, metal sheet 12 promptly is bonded on two horizontal side of cooling tube 17.Figure 11 constitutes the metal sheet 12 of this divider and the orthographic plan of cooling tube 17.This this cooling tube 17 that is arranged in parallel is connected at its each end and holds on liquid case 26 and 27.Hold liquid case 26 and 27 liquid-inlet pipes 28 and liquid discharge pipe 29 that are connected to cooling fluid respectively.The nozzle bore of offering on the reference number 30 finger metal sheets 12.Preferably shown in this most preferred embodiment, row is located at the both sides of nozzle 15a to cooling tube 17.
The nozzle 15b that leads to metal tube 16 vertically is disposed in the wall 33 of separating this passage.This metal box 31 has the inlet mouth 34 and venting port 35 of guiding passage 32 into, is used for introducing and the discharge cooling gas.This inlet mouth 34 is connected respectively on an air-supply duct 38 and the vapor pipe 39 with venting port 35.
The internal structure of metal box 31 there is no particular restriction.Figure 12 is the horizontal sectional drawing that shows bright this metal box one typical internal structure.Many passages that are arranged in parallel 32 are arranged in this metal box 31, and link respectively on gas storage box 36 and 37 at the latter's two ends, and these two gas storage box have inlet mouth 34 and venting port 35 to be used for introducing respectively and the discharge cooling gas in turn.Inlet mouth 34 is connected on the air-supply duct 38, and venting port 35 then is connected on the vapor pipe 39.Nozzle 15b then is disposed on the wall 33 of divider passages 32.
The central authorities of divider 8 are provided with ore spigot discharge 13, are communicated with an ore discharge tube 14.
The present invention not only can be used for the divider that has a down dip towards central part along cone surface with its upper surface shown in Figure 9, and is applicable to the divider with horizontal upper surface.Though the profile type of cooling tube and floor plan are not limited in the foregoing description, cooling tube is to constitute according to suitable form.In divider shown in Figure 13, cooling tube has been taked different collocation forms.The overwhelming majority that constitutes each cooling tube 17 of divider 8a is embedded among the body 11, and the bottom of cooling tube 17 is then concordant with the bottom surface of metal sheet 12.Other configuration identical with shown in Fig. 9 number shows identical or suitable parts with identical reference number among above-mentioned two figure, and this economizes and removes necessary explanation.Different with the embodiment shown in Figure 13, the bottom of cooling tube 17 also can engage with the upper surface of metal sheet 12.Another kind of mode is that cooling tube 17 can be embedded in fully in the body 11 and by web member and link on the metal sheet.Cooling tube 17 preferably joins on the metal sheet 12 with its whole length, but also can do partly to engage by web member.
Show that at Figure 14 among the bright embodiment, ore spigot discharge 13 is positioned at the side of divider 8b.Divider 8b gets the structure that upper surface tilts to ore spigot discharge 13 down.Other configuration identical with shown in Figure 13 explained in order to economize to remove, and shows identical or suitable parts with identical reference number in these two figure.In divider shown in Figure 14, cooling tube 17 can be got structure shown in Figure 9 with metal sheet 12, and promptly cooling tube 17 can be configured to make its first half to be embedded in the body 11.
In most preferred embodiment shown in Figure 15 and 16, wash tube is installed in the below of divider.The configuration of this divider is with shown in Figure 9 identical.Under this divider, two wash tubes 18 are installed with horizontal movable manner, and make the ore discharge tube mediate.Every wash tube 18 has a collection of gas ejection ports 19 towards dispenser bottom.Body of heater 5 is provided with the sleeve pipe 20 by its sidewall.Wash tube 18 can be by the sleeve pipe blast chamber 7 of coming in and going out.For gas injection tube 18 is moved horizontally, outside body of heater 5, be provided with driving mechanism 21.This driving mechanism for example can be made of the reciprocal chain that is locked on this one outstanding position, body of heater outside.Like this, the to-and-fro movement of chain just can drive wash tube 18 blast chamber 7 of coming in and going out through sleeve pipe 20.From then on the extended tail end of body of heater of wash tube 18 is connected on the gas blast pipe 22, links on the gas source 23 through an air-supply duct 24 again.Be provided with valve 25 midway at air-supply duct 24.
Wash tube 18 can be configured to and can drive around himself axis rotation by bright driving mechanism not shown in the figures thus.This this wash tube can be installed in the body of heater with divider shown in Figure 13 or 14.
In this most preferred embodiment, except that cooling tube 17, can also above the cooling tube 17 in body of heater 11 assembly go into other cooling tube.As shown in Figure 8, this class cooling tube can directly engage with metal tube 16, perhaps joins by web member and metal tube 16 or metal sheet 12.
The following describes the operative scenario of the reduction furnace of most preferred embodiment 2.The cooling fluid of water and so on is flowed in the cooling tube 17 that constitutes divider 8,8a or 8b.This cooling fluid makes metal sheet 12 coolings of leading to cooling tube 17, makes metal tube 16 coolings that are inserted in the nozzle through this metal sheet 12 then.Any dust that is attached in the reducing gas of metal tube 16 inboards just condenses rapidly, and is easy to remove.In metal box 31, can allow the cooling gas of nitrogen and so on flow through.This cooling gas slowly turns cold the basal surface of the metal box 31 that constitutes dispenser bottom.Be attached to the dust on the dispenser bottom because sticking power is very little, even under this slow refrigerative condition, also be easy to peel off remove.The gradually cold result of dispenser bottom has stoped with it, and the temperature of the reducing gas of contact descends.
In this most preferred embodiment, the top layer of divider 8 does not add cooling, and this is owing to be attached to any dust in divider 8 top layers and nozzle 15 exits, can be removed rapidly by the strong movement of fluidizing ore grain.Like this, on the inboard of the bottom of divider and nozzle, generally almost there is not dust adhesion.Refrigerative divider top layer in addition not can prevent the heat radiation of fluidized-bed so top layer and lowers the temperature.
In most preferred embodiment shown in Figure 15 and 16,, easily removed by wash tube 18 jet flow stream if there is dust to be attached to the bottom of divider or the ingress of nozzle.Wash tube 18 returns usually and removes outside the stove, then pushes blast chamber 7 by driving mechanism 21 when needing.Generally, the traditional thick about 700mm of divider that only makes by refractory materials.Divider of the present invention then has metal sheet 12, cooling tube 17 and metal box 31 reinforcement as it.This divider is also owing to metal sheet 12, cooling tube 17 are that refrigerative has high strength with metal box 17.Therefore, the thickness of this kind divider can be thinned to about 200mm.So reducing gas by nozzle 15, the inboard contacted area of it and nozzle, more than with the contacted area of making merely of traditional divider with refractory materials be little, thereby the temperature of this reducing gas by nozzle the time descends can bring what problem hardly.
The installing of metal box 31, make near the zone on the metal sheet 12 and cooling tube 17 joints and and metal tube 16 joints near the zone between the temperature difference reduce, so just prevented that metal sheet 12 from hot tearings taking place.Specifically, promptly the cooling gas in the metal box 31 has prevented the zone of the close cooling tube 17 of metal sheet, can cool off cold owing to the height because of cooling tube 17.So just reduced on the metal sheet 12, with near cooling tube 17 joints the zone and with metal tube 16 joints near the interregional temperature difference, thereby prevented that metal sheet 12 is because of excessive temperature difference hot tearing.
Figure 17 to 19 illustrates most preferred embodiment 3 of the present invention.Reference number 105 shows a prereduction body of heater, and reference number 108 shows that one separates the divider of this body of heater.The top above this divider of this body of heater constitutes a prereduction chamber 106, and its bottom below this divider is by constituting a blast chamber 107.Blast chamber 107 is provided with gas blast entrance 109, and the latter leads to an air-supply duct 110 of drawing from reduction furnace for smelting.
The central authorities of divider 108 are provided with ore spigot discharge 113, and the latter is connected on the ore discharge tube 114.In case of necessity, can be between base plate 131 and metal sheet 112, or aforementioned the sort of web member heat supply transmission is set between base plate 131 and cooling tube 117 uses.In order further to prevent the cooling of base plate 131, for example can web member 133 be installed between metal sheet 112 and the base plate 131 by shown in Figure 20.As previously mentioned, this class web member is right in case of necessity installs by any form.Under some situation, divider can be configured to without web member.
The present invention not only can be used for sloping down in the suitable cone surface mode of its upper surface the divider of central part, as shown in figure 17; Also be applicable to divider with horizontal upper surface.Concerning above-mentioned most preferred embodiment, though the section form of cooling tube 117 and floor plan mode are unrestricted, this class cooling tube is to constitute by suitable form.In divider shown in Figure 21, cooling tube is with multi-form configuration.The overwhelming majority of each cooling tube 117 is flush-mounted in the body 111, and the former then flushes with metal sheet 112 basal surfaces the bottom.Person shown in other configuration and Figure 17 removes explanation for economizing together, represents identical or suitable parts with identical reference number in these two figure.Different with embodiment shown in Figure 21, the bottom of the cooling tube 117 here can join the upper surface of metal sheet 112 to.Another kind of mode is that cooling tube 117 can be flush-mounted in fully in the body 111 and by web member and link to each other with metal sheet 112.Cooling tube 117 preferably engages with metal sheet 112 by its whole length, engages but also can make part by web member.
In most preferred embodiment shown in Figure 22, ore spigot discharge 113 is positioned at the side of divider 108b.Divider 108b is configured to, and its upper surface is tilted towards ore spigot discharge 113 downwards, and other configuration identical with shown in Figure 21 removed explanation for economizing, and represents identical or suitable parts with identical reference number in these two figure.In divider shown in Figure 22, cooling tube 117 can be according to body plan shown in Figure 17 with metal sheet 112, and in other words, cooling tube 117 can be configured to make its first half to be flush-mounted in the body 111.In most preferred embodiment shown in Figure 23, base plate 131a forms with metal sheet 112 and directly contacts, and this base plate 131a is made by a thick sheet metal, is similar to foundry goods.Metal tube 132 is configured in the lower end of metal tube 116 and passes base plate 131a.Nozzle 115b connects with nozzle 115a.The material of base plate 131a preferably adopts metal, because metal has thermal conduction preferably, but also available sometimes refractory materials.In the most preferred embodiment shown in Figure 24 and 25, wash tube is located under the divider, the configuration of divider then with Figure 17 in identical.Under this divider, can two wash tubes be installed the mode of propping up with level, and make the ore discharge tube mediate.Every wash tube has a collection of gas ejection ports towards dispenser bottom.Body of heater 105 is provided with the sleeve pipe 120 by its sidewall, and wash tube 118 just can be by these sleeve pipe 120 discrepancy blast chambers 107.Be provided with driving mechanism 121 drives wash tube 118 and moves horizontally in the body of heater outside.This driving mechanism 121 for example can be made of the reciprocal chain that is locked on the one outstanding position, the body of heater outside.Like this, the to-and-fro movement of this kind chain is just driving wash tube 118 by sleeve pipe 120 discrepancy blast chambers 107.Wash tube 118 be connected to a gas blast pipe 122 from the extended tail end of body of heater, the latter is joined via air-supply duct 124 and gas source 123.Be provided with a valve 125 midway at air-supply duct 124.
Wash tube 118 can be configured to, and can be a bright driving mechanism not shown in the figures and drive the form of rotating around self axis.Such wash tube can be installed in the body of heater with divider shown in Figure 21 or 22.
In the present embodiment, except that cooling tube 117, also can other cooling tube be embedded in the body 111 in the top position of cooling tube 117.This kind cooling tube can directly engage with metal tube 116, perhaps can connect metal tube 116 or metal sheet 112 by web member 134.Figure 26 and 27 shows other embodiment.Cooling tube 135 is flush-mounted among the body 111 of cooling tube 117 tops, and this cooling tube 135 is to be linked on the metal tube 116 by the web member 134 of metal sheet or similar type.
The following describes the operation of reduction furnace in the most preferred embodiment 3.The cooling fluid of water and so on is flowed in the cooling tube 117 that constitutes divider 108,108a or 108b.This kind cooling fluid makes metal sheet 112 coolings that connecting cooling tube 117. Make metal tube 116 and 132 coolings that are inserted in the nozzle by metal sheet 112 then.Be attached to any dust quick setting very in the reducing gas of these metal tube 116 inboards, thereby can remove simply.
In the divider of structure shown in Figure 17 to 19, constituting under the base plate 131 of bottom of this kind divider the surface just slowly cools off for the cooling fluid in the cooling tube 117, the chamber 134 of this cooling tube by metal sheet 112 and 131 formation of base plate, be installed in the metal tube 132 between metal sheet 112 and the base plate 131, and web member 133.In the divider of structure shown in Figure 23, constitute the lower surface of the base plate 131 of this dispenser bottom, then for slowly to cool off by the cooling fluid in the cooling tube 117 of base plate 131a.The various dust that are attached to dispenser bottom are because sticking power is very little, even under so slow refrigerative condition, also peel off easily and remove.Dispenser bottom is removed cold result in this wise, has prevented to descend with the temperature of the contacted reducing gas of dispenser bottom.
In this embodiment, the top layer of divider 108 is not cooled off, this is because any dust that invests in this top layer and nozzle 115 outlets can be removed rapidly for the strong movement of fluidisation ore charge, thereby does not generally almost have dust adhesion on this dispenser bottom and nozzle inboard.Do not add refrigerative divider top layer, can prevent the heat radiation of fluidized-bed so top layer and lower the temperature.
In the most preferred embodiment shown in Figure 24 and 25, if there is dust to be attached to the bottom of divider or the inlet of nozzle, this dust also can be by being removed by wash tube 118 jet flow stream easily.Wash tube 118 goes back to the outside of removing body of heater usually, and is advanced in the blast chamber 107 by driving mechanism 121 as required.
Generally, the single thick about 700mm of traditional divider that makes by refractory materials.Divider of the present invention has metal sheet 112, cooling tube 117 and base plate 131 and 131a.As its reinforcement.Also owing to metal sheet 112, cooling tube 117 and base plate 131 and the 131a very high intensity that is cooled, therefore the thickness of this divider can be thinned to about 200mm to this kind divider.So, reducing gas through nozzle 115, the inboard contacted area of it and nozzle is much smaller than it and traditional contacted area of being made by refractory materials merely of divider, thereby the temperature reduction of reducing gas by nozzle the time can cause any problem hardly.
Figure 28 and 29 shows clear most preferred embodiment 4 of the present invention.Reference number 205 refers to the prereduction body of heater, and reference number 208 refers to separate the divider of this body of heater inside.The top above divider of this stove constitutes a prereduction chamber 206, and its bottom below divider then constitutes a blast chamber 207, is provided with gas blast entrance 209 on the latter, is connected on the air-supply duct 210 of drawing from reduction furnace for smelting.
Figure 30 shows the internal structure of understanding slab 211.In slab 211, be provided with a collection of passage 214 in parallel to each other, the latter's two ends with hold liquid case 217 and 218 and be communicated with.These two casees 217 and 218 fluid inlets 219 and leakage fluid dram 220 that have cooling fluid to use respectively.Fluid inlet and leakage fluid dram then are communicated to the feed pipe of using for cooling fluid 221 and liquid discharge pipe 222 respectively.213 at nozzle is located between the passage 214.
The present invention not only can be used for the divider that the surface tilts to central part along cone surface down, as shown in figure 28; Also be applicable to divider with horizontal upper surface.In most preferred embodiment shown in Figure 31, ore spigot discharge 215 is positioned at the side of divider 208a.This divider 208a is configured to its upper surface is tilted towards ore discharge opening 215 downwards.Other configuration identical with shown in Figure 28 removed explanation for economizing, and number refers to identical or suitable parts with identical reference number in these two figure.In the embodiment shown in Figure 32 and 33, wash tube is located at the below of divider.The configuration of this divider identical with shown in Figure 28.Under this divider, two wash tubes 223 are assembled into the movable form of level, and make ore discharge tube 216 mediate.Every wash tube 223 has a collection of gas ejection ports 224 that faces dispenser bottom.The sleeve pipe 225 that passes its sidewall is arranged on the body of heater 205.Wash tube 223 can be by these sleeve pipe 225 discrepancy blast chambers 207.Be provided with driving mechanism 226 in body of heater 205 outsides, drive wash tube 223 and move horizontally.This driving mechanism 226 for example can be made of the reciprocal chain on the outstanding position that is locked in the body of heater outside.Like this, the to-and-fro movement of this chain just can drive vapor pipe 223 via sleeve pipe 225 discrepancy blast chambers 207.Lead to from the tail end and a gas blast pipe 227 of the extended wash tube 223 of body of heater, the latter is joined with the air-supply duct 229 that leads to source of the gas 228.Air-supply duct 229 be provided with valve 230 midway.
Wash tube 223 desirable following structure formations can drive around self axis rotation it for a bright driving mechanism not shown in the figures.This kind wash tube can be installed in the body of heater with divider as shown in figure 31, and the divider of slab 211 formulas is compared with the divider that is combined into by pipe and plate, and the former is constituted and had an advantage that is easy to make by individual plates because be.Because divider need stand very high temperature, will meet difficulty in design their joint and manufacturing processed by the divider that pipe and plate are formed.
The operation of reduction furnace in the explained later most preferred embodiment 4.Allow in the slab 211 of introducing divider 208 or 208a the cooling fluid of water and so on a collection of passage 214 that circulates, discharge from leakage fluid dram then.This kind cooling fluid has reduced inboard the two the temperature of dispenser bottom and nozzle 213, and like this, the dust that is attached in the reducing gas on said bottom and the inboard will condense rapidly, and can remove simply.
Constitute the refractory masses 212 on divider 208 or the 208a, prevented that fluidized-bed from lowering the temperature because of the heat radiation of divider top layer, in addition, it has prevented suitably that also this top is because of wearing and tearing with contacting of fluidisation ore grain.Above-mentioned cooling effect is difficult to arrive the inboard that refractory masses 212 is protected nozzle.But the cumulative up structure of the internal diameter of nozzle 330 can make the ore grain enter and flow therein, just can prevent the adhesion of dust by flowing of ore grain.
In most preferred embodiment shown in Figure 32 and 33, if dust adhesion is in the bottom of divider or the ingress of nozzle, with easy being removed of wash tube 223 jet flow stream.Wash tube 223 returns usually and removes the body of heater side, and available in case of necessity driving mechanism 226 is advanced into blast chamber 207.Generally, the thick about 700mm of conventional allocation Lu that makes by refractory materials merely.Divider of the present invention because its slab 211 is to be made and cooled off by metal or other rigid material, thereby has very high intensity.For this reason, the thickness of this divider can reduce to about 200mm.Like this, flow through the reducing gas of nozzle 213, the inboard contacted area of it and nozzle will be much smaller than its area with the traditional dispensers of only being made by refractory materials, can not bring any problem thereby the temperature decline that takes place during by nozzle when reducing gas is several.
Figure 34 is the synoptic diagram of senelting reduction of the present invention.As shown in figure 34, this kind senelting reduction comprises the reduction furnace for smelting 401 of blown converter type; Pre-reducing furnace 402 is used for the main raw material iron ore of supplying with reduction furnace for smelting 401 is carried out preoxidation; The holder 403 of main raw material, and the holder 404 of auxiliary material.401 of reduction furnace for smelting comprise that the body of heater 405 of a blown converter type, furnace throat through body of heater 405 vertically insert spray gun 406 in the body of heater 405, are installed on the bottom of body of heater 405 and several the gas blast entrances 407 pumped with pump on the sidewall, are installed on the chute 409 that is used for supplying main raw material in the extraction hood 408 that covers furnace throat, a chute 410 and a venting port 411 that is used for supplying auxiliary material.
Central authorities at this divider are provided with an ore relief hole, and the latter leads to an ore discharge tube 419 that is used for unloading the iron ore of putting prereduction already.This ore discharge tube 419 extends downwards by the diapire of pre-reducing furnace 402, through L type valve 420 and two middle holders 421, is communicated with the chute 409 of reduction furnace for smelting again.
Be located at the air-supply duct 422 that venting port and in reduction furnace for smelting 401 extraction hoods 408 leads to gas blast entrance 416 and lead to, this gas blast entrance 416 is arranged in the blast chamber 414 of pre-reducing furnace 402.At air-supply duct 422 tornado dust collector 423 are housed midway.
Be provided with a vapor pipe 424 with venting port 418 with interlinking, in vapor pipe 424, connect and then be provided with tornado dust collector 425.
The holder 403 of main raw material is connecting a chute 417 that supplies raw material for pre-reducing furnace through conduit 426, and the holder of auxiliary material then connects a chute 410 for reduction furnace for smelting 401 supply auxiliary materials.
Claims (24)
1, a kind of pre-reducing furnace of iron ore senelting reduction, it comprises:
One fluidisation prereduction chamber (6) is installed on the top of this pre-reducing furnace, and adding iron ore therein also carries out prereduction to it;
One gas blast chamber (7) is installed on the bottom of this pre-reducing furnace, introduces reducing gas therein;
One divider (8) is separated above-mentioned fluidisation prereduction chamber and gas blast chamber; And
One discharge tube (14) is used for drawing off the ore of prereduction from this fluidisation prereduction chamber;
Be characterised in that above-mentioned divider comprises:
The body of refractory materials system (11),
Be installed in the metal sheet (12) on this body bottom,
By the nozzle (15) of above-mentioned body and metal sheet,
Insert in the metal tube (16) in the said nozzle, and
The cooling tube (17) that is connected with the aforementioned metal plate.
2, pre-reducing furnace as claimed in claim 1 is characterised in that: described cooling tube is to be engaged with this metal sheet by welding process.
3, the stove of also taking by force in advance as claimed in claim 1, be characterised in that: described cooling tube is flush-mounted among the above-mentioned body and by web member and engages with metal sheet.
4, pre-reducing furnace as claimed in claim 1 is characterised in that: it also includes at least two movable wash tubes of level (18) that are installed under the aforementioned dispenser, and every wash tube all has a collection of gas ejection ports (19).
5, pre-reducing furnace as claimed in claim 1 is characterised in that: aforementioned discharge tube is positioned at the bottom center of prereduction chamber, simultaneously by the body of this divider and the diapire of metal sheet and gas blast chamber.
6, pre-reducing furnace as claimed in claim 1 is characterised in that: aforementioned discharge tube is mounted on the sidewall of prereduction chamber.
7, a kind of pre-reducing furnace of iron ore senelting reduction, it comprises:
One fluidisation prereduction chamber (16) is installed on the top of this pre-reducing furnace, adds iron ore therein and it is carried out prereduction;
One gas blast chamber (7) is installed on the bottom of this pre-reducing furnace, and to wherein supplying with reducing gas;
One divider (8) is separated above-mentioned fluidisation prereduction chamber and gas blast chamber; And
One discharge tube (14) is used for drawing off the ore of prereduction from this fluidisation prereduction chamber;
Be characterised in that above-mentioned divider comprises:
The body of refractory materials system (11),
Be installed in the metal sheet (12) on this body bottom,
By first nozzle (15a) of above-mentioned body and metal sheet,
Insert in the metal tube (16) in the said nozzle,
The cooling tube (17) that is connected with the aforementioned metal plate, and
One metal box (31), it is installed under the aforementioned metal plate and is provided with supplied gas mobile passage, and this metal box has the second batch of nozzle (15b) that continues with aforementioned first nozzle.
8, pre-reducing furnace as claimed in claim 7 is characterised in that: it also comprises at least two movable wash tubes of level (18) that are installed under the aforementioned dispenser, and every wash tube all has a collection of gas ejection ports (19).
9, pre-reducing furnace as claimed in claim 7 is characterised in that: said discharge tube is positioned at the bottom center of prereduction chamber, simultaneously by the body of this divider and the diapire of metal sheet and blast chamber.
10, pre-reducing furnace as claimed in claim 7 is characterised in that: said discharge tube is installed on the sidewall of prereduction chamber.
11, a kind of pre-reducing furnace of iron ore senelting reduction, it comprises:
One fluidisation prereduction chamber (106) is installed on the top of this pre-reducing furnace, adds iron ore therein and it is carried out prereduction;
One gas blast chamber (107) is installed on the bottom of this pre-reducing furnace, introduces reducing gas therein;
One divider (108) is separated above-mentioned fluidisation prereduction chamber and gas blast chamber; And
One discharge tube (114) is used for drawing off the ore of prereduction from this fluidisation prereduction chamber;
Be characterised in that: above-mentioned divider comprises:
The body of refractory materials system (111),
Be installed in the metal sheet (112) on this body bottom,
Nozzle by above-mentioned body and metal sheet (115a, 115b),
Insert first metal tube (116) in these nozzles,
Be connected to the cooling tube (117) on the above-mentioned metal sheet, and
The base plate (131) that separates with said metal sheet below one,
Feature is that also second batch of metal tube (132) is connected the lower end of aforementioned first metal tube, and the lower surface of aforementioned base plate is then led in the lower end of this second batch of metal tube, and this base plate and second batch of metal tube form a chamber that is limited by them (134).
12, pre-reducing furnace as claimed in claim 11 is characterised in that: it also includes and is used for web member (133) that said cooling tube has been connected with base plate.
13, pre-reducing furnace as claimed in claim 11 is characterised in that: it also includes and is used for web member that said metal sheet has been connected with base plate.
14, pre-reducing furnace as claimed in claim 11 is characterised in that: it also includes at least two movable wash tubes of level (118) that are installed under the aforementioned dispenser, and every wash tube all has a collection of gas ejection ports (119).
15, pre-reducing furnace as claimed in claim 11 is characterised in that; Aforementioned discharge tube is positioned at prereduction chamber bottom center, simultaneously by the body of this divider and the diapire of metal sheet and gas blast chamber.
16, pre-reducing furnace as claimed in claim 11 is characterised in that: aforesaid discharge tube is installed on the sidewall of prereduction chamber.
17, a kind of pre-reducing furnace of iron ore senelting reduction, it comprises:
One fluidisation prereduction chamber (106) is located at the top of above-mentioned pre-reducing furnace, adds iron ore therein and it is carried out prereduction;
One blast chamber (107) is installed in the bottom of above-mentioned pre-reducing furnace, introduces reducing gas therein:
One divider (108) separates above-mentioned fluidisation prereduction chamber with said blast chamber; And
One discharge tube (114) is used for drawing off the ore of prereduction from said fluidisation prereduction chamber;
Be characterised in that; Above-mentioned divider comprises;
The body of refractory materials system (111),
Be installed in the metal sheet (112) on this body bottom,
Nozzle by above-mentioned body and metal sheet (115a, 115b),
Insert first metal tube (116) in the said nozzle,
The cooling tube (117) that is connected with above-mentioned metal sheet,
Be fixed on the base plate (131a) under this metal sheet, and
With second batch of metal tube (132) that end under said first metal tube interlinks, the latter's lower end is by on the lower surface of aforementioned base plate.
18, pre-reaction stove as claimed in claim 17 is characterised in that: it also comprises at least two movable wash tubes of level (118) that are installed under the said divider, and every wash tube all has a collection of gas ejection ports (119).
19, pre-reducing furnace as claimed in claim 17 is characterised in that; Said discharge tube is positioned at the bottom center of aforementioned prereduction chamber, simultaneously by the body of this divider and the diapire of metal sheet and this blast chamber.
20, as pre-reducing furnace as described in the claim 17, be characterised in that: said ore discharge tube is arranged on the sidewall of aforementioned prereduction chamber.
21, a kind of pre-reducing furnace of iron ore senelting reduction, it comprises;
One fluidisation prereduction chamber (206) is located at the top of this pre-reducing furnace, adds iron ore therein and it is carried out prereduction;
One gas blast chamber (207) is located at the bottom of this pre-reducing furnace, introduces reducing gas therein;
One divider (208) is separated above-mentioned fluidisation prereduction chamber and gas blast chamber; And
One discharge tube (216) is used for drawing off from said fluidisation prereduction chamber the ore of prereduction,
Be characterised in that; Above-mentioned divider comprises:
An inflexible slab (211) has above for cooling fluid mobile passage (214) and first nozzle (213) of opening vertically; And
One refractory masses (212) is installed on the end face of above-mentioned slab and degree cumulative up second batch of nozzle (330) in footpath is arranged.
22, pre-reducing furnace as claimed in claim 21 is characterised in that: it also includes at least two movable wash tubes of level (223) that are installed under the aforementioned dispenser, and every wash tube has a collection of gas ejection ports (224).
23, pre-reducing furnace as claimed in claim 21 is characterised in that; Said discharge tube is positioned at the bottom center of aforementioned prereduction chamber, simultaneously by the body of the divider addressed and the diapire of metal sheet and blast chamber.
24, pre-reducing furnace as claimed in claim 21 is characterised in that: said discharge tube is arranged on the sidewall of prereduction chamber.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP158,157/90 | 1990-06-16 | ||
| JP158,156/90 | 1990-06-16 | ||
| JP158,158/90 | 1990-06-16 | ||
| JP15815690A JPH07103412B2 (en) | 1990-06-16 | 1990-06-16 | Pre-reduction furnace in smelting reduction equipment for iron ore |
| JP2169190A JPH0826381B2 (en) | 1990-06-27 | 1990-06-27 | Pre-reduction furnace in smelting reduction equipment for iron ore |
| JP169,190/90 | 1990-06-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1057487A true CN1057487A (en) | 1992-01-01 |
| CN1023652C CN1023652C (en) | 1994-02-02 |
Family
ID=26485373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91103967 Expired - Fee Related CN1023652C (en) | 1990-06-16 | 1991-06-14 | Prereduction furnace of senelting reduction facility of iron ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023652C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702157A (en) * | 2015-08-01 | 2017-05-24 | 江学艺 | Reduction treatment method and reduction treatment furnace for metal ore |
-
1991
- 1991-06-14 CN CN 91103967 patent/CN1023652C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702157A (en) * | 2015-08-01 | 2017-05-24 | 江学艺 | Reduction treatment method and reduction treatment furnace for metal ore |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1023652C (en) | 1994-02-02 |
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