CN108007190A - A kind of rotary hearth furnace material-feeding mechanism and the rotary hearth furnace using the mechanism - Google Patents
A kind of rotary hearth furnace material-feeding mechanism and the rotary hearth furnace using the mechanism Download PDFInfo
- Publication number
- CN108007190A CN108007190A CN201711473773.1A CN201711473773A CN108007190A CN 108007190 A CN108007190 A CN 108007190A CN 201711473773 A CN201711473773 A CN 201711473773A CN 108007190 A CN108007190 A CN 108007190A
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- China
- Prior art keywords
- rotary hearth
- feeding mechanism
- furnace
- hearth furnace
- expects pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/16—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/38—Arrangements of devices for charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/38—Arrangements of devices for charging
- F27B2009/382—Charging
Abstract
The present invention relates to a kind of rotary hearth furnace material-feeding mechanism and rotary hearth furnace, which includes feeding mechanism, material scraping plate, the first seal silo, the second seal silo and smoke exhaust mechanism.Rotary hearth furnace includes above-mentioned rotary hearth furnace material-feeding mechanism.The present invention supplies a kind of rotary hearth furnace material-feeding mechanism and the rotary hearth furnace with the mechanism, the flue and material-feeding mechanism of rotary hearth furnace are optimized, solve the problem that fabric thickness is not easy adjustment in rotary hearth furnace and flue gas can not efficiently use, while convenient adjustment fabric thickness, the heat taken away as far as possible using flue gas and comprising reducibility gas.
Description
Technical field
The present invention relates to field of metallurgical equipment, and it is more particularly related to a kind of rotary hearth furnace material-feeding mechanism and uses be somebody's turn to do
The rotary hearth furnace of mechanism.
Background technology
Rotary hearth furnace Direct Reduction Technology because it quickly reduces the advantages such as remains stationary opposite with furnace bottom with furnace charge with high temperature,
It is developed rapidly during the last ten years nearly three.The technology realizes the quick of pelletizing mainly by furnace high-temperature with thin bed of material cloth
Reduction.The distributing mode of existing rotary hearth furnace is carried out by the way of vibration or frequency modulation type vibration cloth substantially, and is combined upper
Expect belt of weighing setting hour feeding coal, cloth could be realized in rotary hearth furnace to the bed of material of ideal height.This kind of distributing mode needs
To be adjusted and test in advance under cold condition, in the stove normal production phase, if wanting to adjust the thickness of cloth, do not have
The frequency parameter of relevant matches, then be not easy to realize.In addition, when being oscillating feeder cloth using frequency modulation, if not to batcher
In the aperture of each conveying material runway threshold be adjusted, then the fabric thickness for easily occurring in rotary hearth furnace, neutralizing outer shroud is inconsistent
Situation.
Rotary hearth furnace direct-reduction mainly using fuel gas buring to meet calorific requirement, while quilt in rotary hearth furnace in order to prevent
The metallized pellet re-oxidation of reduction, generally by controlling the ratio of air and combustion gas to control in stove be reducing atmosphere,
Burn insufficient, make the CO gases that certain content is preserved in flue gas.This partial fume has very high temperature, generally 1000
More than DEG C, by being arranged outside flue and chimney, cause substantial amounts of waste heat and CO resource there is no and make full use of；Or the cigarette of high temperature
Gas is again through smoke stack emission after heat exchange, waste heat boiler etc. first utilize waste heat, this kind of processing method is, it is necessary to exchange heat
The investment of the equipment such as device, boiler, in addition can cause heat exchanger blocking or erosion failure, no in flue gas there are substantial amounts of dust
Fume afterheat can be efficiently used, the CO in flue gas is not more utilized.
The content of the invention
The present invention is in view of the above-mentioned problems, purpose is to provide a kind of rotary hearth furnace material-feeding mechanism and turns bottom using the mechanism
Stove.The flue and material-feeding mechanism of rotary hearth furnace are optimized, solve rotary hearth furnace in fabric thickness be not easy adjustment and flue gas without
The problem that method efficiently uses.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：
According to the present invention, there is provided a kind of rotary hearth furnace material-feeding mechanism, comprising：
Feeding mechanism, feeding mechanism include top expects pipe and lower part expects pipe, and top expects pipe and lower part expects pipe are tightly connected；On
The top of portion's expects pipe has feed inlet, and the bottom of lower part expects pipe has discharge port；
Smoke exhaust mechanism, smoke exhaust mechanism have bleeding point and gas outlet, and bleeding point is communicated to inside the expects pipe of top；Smoke exhaust mechanism
Enter for flue gas to be evacuated in feeding mechanism, and from the bleeding point of the smoke exhaust mechanism, from the institute of the smoke exhaust mechanism
State gas outlet discharge.
Further, rotary hearth furnace material-feeding mechanism also includes material scraping plate, and material scraping plate is arranged on the one side of feeding mechanism and scrapes
Flitch can be moved up and down along the feedstock direction of feeding mechanism.It is in axial direction moveable that can also be described as material scraping plate.
Further, rotary hearth furnace material-feeding mechanism also includes close for the first seal silo of the speed of control charging and second
Seal feed bin；First seal silo is arranged on above the second seal silo, and the first seal silo and the second seal silo pass through
First sealed valve connects；Second seal silo is connected with the feed inlet of top expects pipe.
Further, it is connected between the second seal silo and the feed inlet of top expects pipe by the second sealed valve, is passed through
Second sealed valve is opened and closed to realize that the first seal silo and the second seal silo feed or are sealed into feeding mechanism
Expect mechanism.
Further, top expects pipe can be cylindric expects pipe, and lower part expects pipe can be square expects pipe.
Further, material scraping plate is made of heat-resistance stainless steel plate, and the thickness of the heat-resistance stainless steel plate is 20mm.
Further, smoke exhaust mechanism is arranged at 2nd/1st to three/3rd of top expects pipe.
Further, smoke exhaust mechanism includes at least three air-introduced machines.
Further, at least three air-introduced machines are circumferentially provided at 2nd/1st to three/3rd of top expects pipe, air inducing
The quantity of machine makes choice according to actual power, can be three air-introduced machines, i.e., circumferential to set one at interval of 120 °, Huo Zhesi
A air-introduced machine, i.e., it is circumferential to set one at interval of 90 °.
Further, the top of material scraping plate is provided with coolant inlet and coolant outlet, and material scraping plate is internally provided with
The coolant circulation passage that both ends are connected with coolant inlet and coolant outlet.
Further, the cooling agent for being passed through material scraping plate can be water.
Further, the shell of top expects pipe and lower part expects pipe is made of heat-resistance stainless steel plate, heat-resistance stainless steel plate it is interior
Surface is amorphous refractory, such as corundum castable.
Further, the thickness of the heat-resistance stainless steel plate of the shell of top expects pipe and lower part expects pipe is 5mm, and indefinite form is resistance to
The thickness of fiery material is 50mm~100mm.
According to the present invention, a kind of rotary hearth furnace is also provided, includes rotary hearth furnace material-feeding mechanism described above and annular furnace body, ring
Shape furnace body is circumferentially disposed with loading area, high temperature reduction area, cooling zone and discharge zone, and above-mentioned material-feeding mechanism is arranged on charging
Area.
Further, rotary hearth furnace is also comprising ring-shaped furnace bottom, furnace bottom transmission mechanism, the heat power engineering system for being heated for rotary hearth furnace
And discharging mechanism；Ring-shaped furnace bottom is correspondingly arranged at the lower section of annular furnace body, and ring-shaped furnace bottom is supported by furnace bottom transmission mechanism and with furnace bottom
Transmission mechanism drives rotation；The feed inlet of feeding mechanism extend out to the outside at the top of annular furnace body, the discharge port of feeding mechanism
It is arranged on above ring-shaped furnace bottom, and is more than fabric thickness with the distance between ring-shaped furnace bottom, material scraping plate is adjustable to and annular furnace
The distance between bottom is equal to fabric thickness；First barricade of loading area and high temperature reduction area radial direction separates, high temperature reduction area and
Separated between cooling zone with the second barricade of radial direction, the first barricade and the second barricade do not contact with the cloth of furnace bottom.
Further, the distance between the first barricade and furnace bottom are 15cm~25cm, the distance ensure flue gas can smoothly into
Enter loading area, then discharged by feeding mechanism, while reduce the entrance of high temperature reduction area heat, to reduce the temperature of loading area；
The distance between second barricade and furnace bottom are 5cm~15cm.
Further, annular furnace body is made of inner ring furnace wall, outer shroud furnace wall and annular furnace roof, the inside and outside side of annular furnace roof
The top of inner ring furnace wall and outer shroud furnace wall is connected to, forms annular furnace.
Further, the inner and outer ring furnace wall of ring-shaped furnace bottom and annular furnace body keeps the distance of 10cm~20cm, it is ensured that furnace bottom
Still retain under high-temperature expansion effect with furnace wall can normal rotation safe distance, if retaining apart from excessive, easily make airtight
Property be deteriorated.
Further, loading area and the third gear wall of discharge zone radial direction separate, the distance between third gear wall and furnace bottom
For 8-15cm.
Further, the discharge port of feeding mechanism is arranged on above ring-shaped furnace bottom at 15cm~25cm.
Further, material scraping plate be arranged on feeding mechanism side be feeding mechanism trailing flank, position relationship " preceding ",
" rear " is along rotary hearth furnace ring-shaped furnace bottom rotation direction, after the side close to high temperature reduction area is, before being close to discharge zone.
Further, heat power engineering system includes multiple burners, which is arranged on the corresponding furnace wall side wall in high temperature reduction area,
For being heated to material in stove.
Further, discharging mechanism is set on discharge zone, and discharge zone is in cooling zone end and adjacent with loading area, for turning
Bottom furnace discharge.
It is used in the present invention it is radial and axial be for rotary hearth furnace, specifically, radially refer to and rotary hearth furnace
Ring-shaped furnace bottom places the parallel direction of material plane；Axial direction used in the present invention refers to put with the ring-shaped furnace bottom of rotary hearth furnace
The vertical direction of glove material plane.
The beneficial effects of the invention are as follows：
The present invention provides a kind of rotary hearth furnace material-feeding mechanism and the rotary hearth furnace with the mechanism, to the flue and cloth of rotary hearth furnace
Mechanism optimizes, and the problem that fabric thickness is not easy adjustment in rotary hearth furnace and flue gas can not efficiently use is solved, convenient
While adjusting fabric thickness, the complementary energy of flue gas make use of as far as possible, after some time it is possible to reach energy-saving purpose, improves at the same time
The production efficiency of rotary hearth furnace.
Rotary hearth furnace material-feeding mechanism of the invention and the rotary hearth furnace with the mechanism are in the stove normal production phase, you can realize
To the flexible modulation of fabric thickness, it is not necessary to which carrying out experiment gropes related process parameters in advance.
Brief description of the drawings
Fig. 1 is the schematic diagram of the rotary hearth furnace feeding mechanism of embodiment according to the invention；
Fig. 2 is the schematic diagram of the material scraping plate of embodiment according to the invention；
Fig. 3 is the schematic diagram of the rotary hearth furnace of embodiment according to the invention.
Reference numeral
Under 1 first seal silo, 2 second seal silos, 3 first sealed valves, 4 second sealed valves, 5 top expects pipes, 6
Portion's expects pipe, 7 material inlets, 8 discharge ports, 9 smoke exhaust mechanisms, 10 material scraping plates, 11 coolant inlets, 12 coolant outlets, 13 coolings
Agent circulation canal, 14 ring-shaped furnace bottoms, 15 loading areas, 16 high temperature reduction areas, 17 cooling zones, 18 discharging mechanisms, 19 first barricades, 20
Second barricade, 21 third gear walls, 22 feed inlets.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
As shown in Figs. 1-2, there is provided a kind of rotary hearth furnace material-feeding mechanism, comprising：
Feeding mechanism, the feeding mechanism include top expects pipe 5 and lower part expects pipe 6, and top expects pipe 5 and lower part expects pipe 6 seal
Connection；The top of top expects pipe 5 has feed inlet 22, and the bottom of lower part expects pipe 6 has discharge port 8；
Material scraping plate 10, which is arranged on the trailing flank of feeding mechanism and material scraping plate 10 is along the charging side of feeding mechanism
To being moveable up and down.It is in axial direction moveable that can also be described as material scraping plate 10.When material bed in rotary hearth furnace
, can be by material scraping plate upwards (i.e. towards the top expects pipe direction of feeding mechanism or the side opposite with feedstock direction when needing thicker
To) mobile；, can be by material scraping plate downwards (i.e. towards the lower part expects pipe of feeding mechanism when the material bed needs in rotary hearth furnace are relatively thin
Direction or the direction consistent with feedstock direction) it is mobile.
First seal silo 1 and the second seal silo 2,1 and second seal silo 2 of the first seal silo be used for control into
The speed of material；First seal silo 1 has the material inlet 7 for being used for sealing and feed；It is close that first seal silo 1 is arranged on second
The top of feed bin 2 is sealed, and the first seal silo 1 and the second seal silo 2 are connected by the first sealed valve 3；Second sealing material
Storehouse 2 is connected with the feed inlet 22 of top expects pipe 5, and the second seal silo 2 and the feed inlet 22 of top expects pipe 5 are close by second
Envelope valve 4 connects；
Smoke exhaust mechanism 9, the smoke exhaust mechanism 9 have bleeding point and gas outlet, and bleeding point is communicated to inside top expects pipe 5；Row
Smoke machine structure 9 is used to flue gas being evacuated in feeding mechanism, and enters from the bleeding point of smoke exhaust mechanism 9, from the gas outlet of smoke exhaust mechanism 9
Discharge.
In another embodiment of the invention, smoke exhaust mechanism 9 has bleeding point and gas outlet, and bleeding point connects a pipeline,
The pipeline is extended in top expects pipe 5 and connected with top expects pipe 5；Smoke exhaust mechanism 9 is used to flue gas being evacuated in feeding mechanism, and
Discharged from the gas outlet of smoke exhaust mechanism 9.
Preferably, top expects pipe 5 can be cylindric expects pipe, and lower part expects pipe 6 can be square expects pipe.
Preferably, the shell of top expects pipe 5 and lower part expects pipe 6 is made of heat-resistance stainless steel plate, heat-resistance stainless steel plate it is interior
Surface is amorphous refractory, such as corundum castable.
Preferably, the thickness of the heat-resistance stainless steel plate of the shell of top expects pipe 5 and lower part expects pipe 6 is 5mm, indefinite form fire resisting
The thickness of material is 50mm~100mm.
Preferably, the top of material scraping plate 10 is provided with coolant inlet 11 and coolant outlet 12, the inside of material scraping plate 10
It is provided with the coolant circulation passage 13 that both ends are connected with coolant inlet 11 and coolant outlet 12.
Preferably, the cooling agent for being passed through material scraping plate 10 can be water.
Preferably, material scraping plate 10 is made of heat-resistance stainless steel plate, and the thickness of the heat-resistance stainless steel plate is 20mm.
Preferably, it is connected between the second seal silo 2 and the feed inlet 22 of top expects pipe 5 by the second sealed valve 4, is led to
The second sealed valve 4 is crossed to open and close to realize the first seal silo 1 and the second seal silo 2 to feeding mechanism charging or close
Seal feeding mechanism.
Preferably, smoke exhaust mechanism 9 is arranged at 2nd/1st to three/3rd of top expects pipe 5.
Preferably, smoke exhaust mechanism 9 includes at least three air-introduced machines.
Preferably, at least three air-introduced machines are circumferentially provided at 2nd/1st to three/3rd of top expects pipe 5, air-introduced machine
Quantity make choice according to actual power, can be three air-introduced machines, i.e., circumferential direction is at interval of 120 ° of settings one, or four
Air-introduced machine, i.e., it is circumferential to set one at interval of 90 °.
As shown in figure 3, be a kind of rotary hearth furnace, comprising rotary hearth furnace material-feeding mechanism as above, annular furnace body, ring-shaped furnace bottom 14,
Furnace bottom transmission mechanism, heat power engineering system and discharging mechanism 18 for being heated for rotary hearth furnace；Ring-shaped furnace bottom 14 is correspondingly arranged at annular furnace
The lower section of body, ring-shaped furnace bottom 14, which is supported by furnace bottom transmission mechanism and driven with furnace bottom transmission mechanism, to be rotated.Annular furnace body is by inner ring
Furnace wall, outer shroud furnace wall and annular furnace roof composition, the inside and outside side of annular furnace roof is connected to the top of inner ring furnace wall and outer shroud furnace wall
End, forms annular furnace.
Preferably, the inner and outer ring furnace wall of ring-shaped furnace bottom 14 and annular furnace body keeps the distance of 10cm~20cm, it is ensured that furnace bottom
Still retain under high-temperature expansion effect with furnace wall can normal rotation safe distance, if retaining apart from excessive, easily make airtight
Property be deteriorated.
Preferably, annular furnace body is circumferentially disposed with loading area 15, high temperature reduction area 16, cooling zone 17 and discharging
Area；Loading area 15 and high temperature reduction area 16 are separated with the first barricade 19 of radial direction, are used between high temperature reduction area 16 and cooling zone 17
Second barricade 20 of radial direction separates, and the first barricade 19 and the second barricade 20 do not contact with furnace bottom.Heat power engineering system includes multiple burnings
Mouth, the burner are arranged on the corresponding furnace wall side wall in high temperature reduction area 16, for being heated to material in stove.Set out on discharge zone
Expect mechanism 18, discharge zone is discharged for rotary hearth furnace in 17 end of cooling zone and adjacent with loading area 15.
Preferably, the distance between the first barricade 19 and furnace bottom are 15cm~25cm, the distance ensure flue gas can smoothly into
Enter loading area 15, then discharged by feeding mechanism, while reduce the entrance of 16 heat of high temperature reduction area, to reduce loading area 15
Temperature.
Preferably, the distance between the second barricade 20 and furnace bottom are 5cm~15cm.
Preferably, loading area 15 and the third gear wall 21 of discharge zone radial direction separate, between third gear wall 21 and furnace bottom
Distance is 8-15cm.
Preferably, rotary hearth furnace material-feeding mechanism is arranged on the loading area 15 of annular furnace body, the charger of rotary hearth furnace material-feeding mechanism
The feed inlet 22 of structure extend out to the outside at the top of annular furnace body, and the discharge port 8 of feeding mechanism is arranged on the top of ring-shaped furnace bottom 14
And do not contacted with ring-shaped furnace bottom 14.
Preferably, the discharge port 8 of feeding mechanism is arranged at 14 top 15cm~25cm of ring-shaped furnace bottom.
Preferably, material scraping plate 10 be arranged on feeding mechanism side be feeding mechanism trailing flank, position relationship " preceding ",
" rear " is along 14 rotation direction of rotary hearth furnace ring-shaped furnace bottom, after the side close to high temperature reduction area 16 is, before being close to discharge zone.
Radial direction used in the present invention refers to the direction parallel with the placement material plane of the ring-shaped furnace bottom of rotary hearth furnace 14；This
Axially refer to the direction vertical with the placement material plane of the ring-shaped furnace bottom of rotary hearth furnace 14 used in invention.
The rotary hearth furnace of the present invention and the course of work of rotary hearth furnace material-feeding mechanism are：
Material is delivered to the first seal silo 1, material enters charger through the first seal silo 1, the second seal silo 2
Structure.Before furnace bottom starts rotation, material is filled into feeding mechanism, discharge port 8 is closed at this time, and the second sealed valve 4 is opened, and first is close
Envelope valve 3 is opened；The second sealed valve 4 is closed, the first sealed valve 3 is closed after material is filled the second seal silo 2；Finally
Material is filled to the material inlet 7 that the first seal silo 1 is closed after the first seal silo 1.With production progress, (discharge port 8 is beaten
Open), rotary furnace bottom starts to rotate, and when the material in feeding mechanism declines soon close to the bleeding point of smoke exhaust mechanism 9, opens the
The second sealed valve 4 between two seal silos 2 and top expects pipe 5 feeds, and the first sealed valve 3 is closed at this time；It is to be installed
After material, close the second sealed valve 4 and sealed.Then, the first sealed valve 3 is opened, makes the first seal silo 1 downward
Second seal silo 2 in portion is fed, and after treating the discharging of the first seal silo 1, first between two seal silos of closing is close
Envelope valve 3 is sealed, while opens the material inlet 7 of the first seal silo 1, externally to the first seal silo 1 into luggage
Material.
Material is delivered to the ring-shaped furnace bottom 14 of rotary hearth furnace by the discharge port 8 of feeding mechanism, adjust at this time material scraping plate 10 with
The interval of ring-shaped furnace bottom 14 with adjust cloth height.For example, it is 10cm that cloth is highly desirable, then material scraping plate 10 and ring-shaped furnace bottom 14
At intervals of 10cm.With the rotation of ring-shaped furnace bottom 14, material is transported to high temperature reduction area 16 and is reduced, after the completion of reduction
Material cooled down into cooling zone 17, finally enter discharge zone by discharging mechanism 18 discharge product.
Flue gas can be produced in the above-mentioned rotary hearth furnace course of work, CO content in smoke is higher, while has higher temperature,
Under the action of smoke exhaust mechanism 9, flue gas of the high temperature containing CO enters loading area 15 with the direction of rotation opposite with ring-shaped furnace bottom 14, into
And entered by the lower part expects pipe 6 of feeding mechanism, it is expelled to smoke exhaust mechanism 9 and from smoke exhaust mechanism 9 from feeding mechanism top expects pipe 5
Discharge gas outlet.By during material to be restored, self heat can be passed to material to be restored in feeding mechanism, while in flue gas
Reducibility gas, such as CO can also by material to be restored metal oxide party reduce, realize and use up flue gas complementary energy
Possible recycling, advantageously reduces reduction energy consumption.Further, since entering stove material has carried out preheating and prereduction, eliminate
Preheating zone, middle warm area in existing rotary hearth furnace, increase the angle in high temperature reduction area 16, extend material effective recovery time,
Further lift the production efficiency of stove.
Embodiment 1
As shown in Figs. 1-3, above-mentioned rotary hearth furnace burner hearth is divided into loading area 15, high temperature reduction area 16, cooling zone 17 and goes out
Expect area.Separated between cooling zone 17 and high temperature reduction area 16 with the second barricade 20 of radial direction, loading area 15 and high temperature reduction area 16
Between separated with the first barricade 19 of radial direction, and separated between loading area 15 and discharge zone with the third gear wall 21 of radial direction；The
First, second, third barricade 21 is high temperature resistant retaining wall.Second barricade, 20 lower end is 10cm apart from furnace bottom upper surface；First barricade 19
Lower end apart from furnace bottom upper surface be 25cm；The lower end of third gear wall 21 is 10cm apart from furnace bottom upper surface.The cloth of rotary hearth furnace
Mechanism is made of feeding mechanism, material scraping plate 10, the first seal silo 1, the second seal silo 2 and smoke exhaust mechanism 9, wherein charger
Structure and smoke exhaust mechanism 9 share a passage.Feeding mechanism top expects pipe 5 is cylindrical, and lower part expects pipe 6 is square, upper and lower two
Connection is sealed against each other between sub-feed tube, the discharge port 8 of feeding mechanism is fixed on furnace roof apart from furnace bottom top 20cm.Scrape
Flitch 10 is radially arranged behind discharge port 8, and the lower end of material scraping plate 10, when furnace bottom rotates, can be incited somebody to action away from furnace bottom upper surface 4cm
From feeding mechanism into material spread to the thickness of 4cm, to complete cloth；Wherein cooling water is passed through inside material scraping plate 10 to be cooled down.
Second seal silo 2 is connected with the feed inlet 22 of top expects pipe 5.First seal silo 1 has material inlet 7, and passes through material
Import 7 is fed and is sealed, and has the first sealed valve 3, the second sealing among the first seal silo 1 and the second seal silo 2
It is connected between feed bin 2 and the feed inlet 22 of top expects pipe 5 by the second sealed valve 4, it is close by the first sealed valve 3 and second
Seal valve 4 opening and closing come realize feed bin to feeding mechanism or sealing feeding mechanism.Smoke exhaust mechanism 9 is located at top feed pipe
2/3rds at, circumferentially aspect is set ring circle feed pipe, and smoke exhaust mechanism 9 be air-introduced machine, and air-introduced machine quantity is four, is pressed
According to 90 ° of settings of circle spacing, for will be arranged outside flue gas.
With the rotation of rotary furnace bottom, the material charge level of feeding mechanism top expects pipe 5 constantly moves down, and it is fast to treat that material declines
Close to smoke exhaust mechanism 9 bleeding point when, open the second sealed valve 4, fed into feeding mechanism.CO in rotary hearth furnace high-temperature flue gas
Content is higher, under the effect of smoke exhaust mechanism 9, successively by being arranged outside lower part and top feed pipe, and during by material to be restored, a side
Self heat can be passed to material to be restored by face, heat material to be restored, while the reducibility gas in flue gas will can also be treated
Metal oxide party reduction in reducing material, realizes and recycles flue gas complementary energy as far as possible.
Embodiment 2
The present embodiment is rotary hearth furnace and rotary hearth furnace material-feeding mechanism same as Example 1, difference lies in：Under second barricade 20
End is 15cm apart from furnace bottom upper surface；First barricade, 19 lower end is 20cm apart from furnace bottom upper surface；The lower end of third gear wall 21 away from
It is 8cm from furnace bottom upper surface.The discharge port 8 of feeding mechanism is apart from furnace bottom top 15cm, and the lower end of material scraping plate 10 is away from furnace bottom upper table
Face 5cm.
Embodiment 3
The present embodiment is rotary hearth furnace and rotary hearth furnace material-feeding mechanism same as Example 1, difference lies in：Under second barricade 20
End is 5cm apart from furnace bottom upper surface；The lower end of first barricade 19 is 15cm apart from furnace bottom upper surface；The lower end of third gear wall 21 away from
It is 15cm from furnace bottom upper surface.The discharge port 8 of feeding mechanism is apart from furnace bottom top 25cm, and the lower end of material scraping plate 10 is away from furnace bottom upper table
Face 4cm.Smoke exhaust mechanism 9 is located at 1/3rd of top feed pipe, and circumferentially aspect is set ring circle feed pipe, smoke exhaust mechanism
9 be air-introduced machine, and air-introduced machine quantity is three, according to 120 ° of settings of circle spacing, for will be arranged outside flue gas.
The foregoing is merely presently preferred embodiments of the present invention, is not used for limiting practical range of the invention；If do not take off
From the spirit and scope of the present invention, to technical scheme is modified or replaced equivalently of the present invention, should all cover in the claims in the present invention
Among protection domain.
Claims (10)
1. a kind of rotary hearth furnace material-feeding mechanism, it is characterised in that include：
Feeding mechanism, the feeding mechanism include top expects pipe and lower part expects pipe, and the top expects pipe and the lower part expects pipe are close
Envelope connection；The top of the top expects pipe has feed inlet, and the bottom of the lower part expects pipe has discharge port；
Smoke exhaust mechanism, the smoke exhaust mechanism have bleeding point and gas outlet, and the bleeding point is communicated to inside the top expects pipe；
The smoke exhaust mechanism is used to flue gas being evacuated in the feeding mechanism, and enters from the bleeding point of the smoke exhaust mechanism, from
The gas outlet discharge of the smoke exhaust mechanism.
2. rotary hearth furnace material-feeding mechanism as claimed in claim 1, it is characterised in that the rotary hearth furnace material-feeding mechanism also includes scraper
Plate, the material scraping plate is arranged on the one side of the feeding mechanism and the feedstock direction of the material scraping plate along the feeding mechanism can
Move up and down.
3. rotary hearth furnace material-feeding mechanism as claimed in claim 1, it is characterised in that the rotary hearth furnace material-feeding mechanism, which also includes, to be used for
Control the first seal silo and the second seal silo of the speed of charging；First seal silo is arranged on second sealing
Above feed bin, and first seal silo is connected with second seal silo by the first sealed valve；Described second
Seal silo is connected with the feed inlet of the top expects pipe.
4. rotary hearth furnace material-feeding mechanism as claimed in claim 1, it is characterised in that the smoke exhaust mechanism is arranged on the top material
At 2nd/1st to three/3rd of pipe.
5. rotary hearth furnace material-feeding mechanism as claimed in claim 4, it is characterised in that the smoke exhaust mechanism includes at least three air inducing
Machine.
6. rotary hearth furnace material-feeding mechanism as claimed in claim 2, it is characterised in that the top of the material scraping plate is provided with cooling agent
Import and coolant outlet, the both ends that are internally provided with of the material scraping plate connect with the coolant inlet and the coolant outlet
Logical coolant circulation passage.
7. rotary hearth furnace material-feeding mechanism as claimed in claim 1, it is characterised in that the top expects pipe and the lower part expects pipe
Shell is made of heat-resistance stainless steel plate, and the inner surface of the heat-resistance stainless steel plate is amorphous refractory.
A kind of 8. rotary hearth furnace, it is characterised in that comprising such as the claims 1-7 any one of them rotary hearth furnace material-feeding mechanism with
And annular furnace body, the annular furnace body is circumferentially disposed with loading area, high temperature reduction area, cooling zone and discharge zone, described
Material-feeding mechanism is arranged on the loading area.
9. rotary hearth furnace as claimed in claim 8, it is characterised in that the rotary hearth furnace is also comprising ring-shaped furnace bottom, furnace bottom driver
Structure, heat power engineering system and discharging mechanism for being heated for rotary hearth furnace；
The ring-shaped furnace bottom is correspondingly arranged at the lower section of the annular furnace body, ring-shaped furnace bottom supported by the furnace bottom transmission mechanism and with
The furnace bottom transmission mechanism drives rotation；The feed inlet of the feeding mechanism extend out to the outside at the top of the annular furnace body,
The discharge port of the feeding mechanism is arranged on above the ring-shaped furnace bottom, and is more than cloth with the distance between the ring-shaped furnace bottom
Thickness, the material scraping plate are adjustable to the distance between described ring-shaped furnace bottom and are equal to fabric thickness；And/or
The loading area and the separation of the first barricade, the high temperature reduction area and the cooling zone of high temperature reduction area radial direction
Between separated with the second barricade of radial direction, first barricade and second barricade do not contact with the cloth of the furnace bottom.
10. rotary hearth furnace as claimed in claim 9, it is characterised in that the distance between first barricade and described furnace bottom are
15cm~25cm；The distance between second barricade and the furnace bottom are 5cm~15cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711473773.1A CN108007190A (en) | 2017-12-29 | 2017-12-29 | A kind of rotary hearth furnace material-feeding mechanism and the rotary hearth furnace using the mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711473773.1A CN108007190A (en) | 2017-12-29 | 2017-12-29 | A kind of rotary hearth furnace material-feeding mechanism and the rotary hearth furnace using the mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868362A (en) * | 2019-04-11 | 2019-06-11 | 中冶长天国际工程有限责任公司 | A kind of circular grate pelletizing machine |
-
2017
- 2017-12-29 CN CN201711473773.1A patent/CN108007190A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868362A (en) * | 2019-04-11 | 2019-06-11 | 中冶长天国际工程有限责任公司 | A kind of circular grate pelletizing machine |
| CN109868362B (en) * | 2019-04-11 | 2024-02-13 | 中冶长天国际工程有限责任公司 | Ring type roasting machine |
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