CN106403593A - Magnetizing-reducing roasting integrated rotary hearth furnace - Google Patents
Magnetizing-reducing roasting integrated rotary hearth furnace Download PDFInfo
- Publication number
- CN106403593A CN106403593A CN201611027317.XA CN201611027317A CN106403593A CN 106403593 A CN106403593 A CN 106403593A CN 201611027317 A CN201611027317 A CN 201611027317A CN 106403593 A CN106403593 A CN 106403593A
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- CN
- China
- Prior art keywords
- furnace
- rotary hearth
- barricade
- hearth furnace
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F27B13/00—Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over stationary charge
- F27B13/02—Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over stationary charge of multiple-chamber type with permanent partitions; Combinations of furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- 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
- F27B13/00—Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over stationary charge
- F27B13/06—Details, accessories, or equipment peculiar to furnaces of this type
-
- 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
- F27B13/00—Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over stationary charge
- F27B13/06—Details, accessories, or equipment peculiar to furnaces of this type
- F27B13/12—Arrangements of heating devices
Abstract
The invention discloses a magnetizing-reducing roasting integrated rotary hearth furnace. The magnetizing-reducing roasting integrated rotary hearth furnace comprises a furnace body, a furnace bottom, retaining walls, radiant tubes and combustors; the furnace body comprises an outside wall, a furnace top and an inside wall; the outside wall is connected with the inside wall through the furnace top; the cross section of the furnace body is annular; the furnace bottom is annular and is positioned below the furnace body; the furnace bottom and the furnace body form annular space; the retaining walls are arranged in the furnace body and are connected with the outside wall, the furnace top and the inside wall to divide the annular space into a magnetizing roasting area and a reducing roasting area; the retaining walls comprise a hollow retaining wall and a solid retaining wall; a reducing agent inlet is formed in the hollow retaining wall; the upper part and the lower part of the interior of the hollow retaining wall penetrate vertically; the radiant tubes and the combustors are mounted on the furnace body. According to the rotary hearth furnace disclosed by the invention, magnetizing roasting and reducing roasting of a material can be completed integrally, a reducing effect is good, and the operating cost is low.
Description
Technical field
The invention belongs to technical field of metallurgical equipment, the rotary hearth furnace of more particularly, to a kind of magnetization-reduction roasting one.
Background technology
Rotary hearth furnace direct-reduction technique is nearly three ironmaking growing up during the decade and processes special nonferrous metallic ores
New technology.Rotary hearth furnace direct-reduction eliminates blast furnace coking flow process, is the technology of energy-conserving and environment-protective.Because this technique is to former
Material is less demanding with fuel, rationally can utilize natural resources, thus be paid high attention to by metallurgical and coloured industry.
Rotary hearth furnace oil ring shape siege, outboard sidewalls, furnace roof, combustion system etc. form.Side wall, furnace roof maintain static, siege
Circulation rotating is driven by furnace bottom transmission mechanism.The technological process of rotary hearth furnace is to add fine ore and reducing agent to make after binding agent
Ball, and pelletizing is evenly spaced in the furnace bottom of rotary hearth furnace, during the pelletizing on furnace bottom rotates a circle with furnace bottom, complete also
Former.The metallized pellet being produced by rotary hearth furnace can be as the raw material of blast furnace or molten point of stove etc., to obtain metal.
The process characteristic of rotary hearth furnace：
(1) in rotary hearth furnace, the material of reduction roasting is carbonaceous pelletizing, and the contact between carbon and iron oxide closely, has good
Good quick reducing condition.
(2) rotary hearth furnace reduction roasting technique is that the thin bed of material heats in high temperature, can achieve quick reduction, and furnace charge is gone back in stove
The former time is short.
(3) because the thin bed of material, furnace charge be not pressurized in rotary hearth furnace, and no relative motion between furnace charge and furnace lining, therefore right
The intensity requirement of furnace charge is not high, will not produce dough and body of heater resistance to material bonding phenomenon.
Current rotary hearth furnace is although the treating capacity of separate unit is larger, but single function, only reduction effect, some are needed
Want the raw material direct-reduction effect of magnetizing roast poor, limit the use of rotary hearth furnace；The furnace atmosphere of rotary hearth furnace is uncontrollable, material
The problems such as heat uneven needs to improve.
Content of the invention
In order to solve the above problems, the present invention proposes a kind of rotary hearth furnace of magnetization-reduction roasting one, and this rotary hearth furnace can be by
The magnetizing roast for the treatment of material is carried out with reduction roasting priority, barricade can by magnetizing roast area and reduction roasting area atmosphere every
From magnetizing roast area adopts radiant tube to heat, and forms neutral atmosphere, and reduction roasting area is reducing atmosphere, and reduction effect is good, runs
Cost is little.
The present invention provides a kind of magnetization-reduction roasting one rotary hearth furnace, including body of heater, furnace bottom, barricade, radiant tube and burning
Device；
Described body of heater includes lateral wall, furnace roof and madial wall, and described lateral wall connects described madial wall by furnace roof, described
The cross-sectional area of body of heater is annular；
Described furnace bottom is ring-type, and below described body of heater, described furnace bottom constitutes annular space with described body of heater；
In described body of heater, described barricade connects described lateral wall, furnace roof and madial wall, described barricade to described dams setting
Described annular space is divided into magnetizing roast area and reduction roasting area, described barricade includes hollow barricade and solid barricade, institute
State hollow barricade and be provided with reducing agent entrance, described hollow barricade inside up/down perforation；
Described radiant tube and burner are installed on described body of heater.
The furnace bottom of rotary hearth furnace is rotatable, drives material to move in body of heater.Barricade is vertically arranged in body of heater, by rotary hearth furnace
Interior annular space is divided into different regions, and different regions can arrange different atmosphere, and the atmosphere of zones of different will not
Interfere with each other the multi-functional utilization it is achieved that rotary hearth furnace.
Reducing agent entrance is arranged on the top of hollow barricade, hollow barricade inner hollow, enters rotary hearth furnace as reducing agent
Passage, can prevent reducing agent falling process occur burning and uneven cloth.
Further, setting feeding mouth and discharging opening on described body of heater, described feeding mouth is arranged on described magnetizing roast area
On lateral wall, described discharging opening is arranged on described reduction roasting area lateral wall.
As the preferred version of the present invention, described feeding mouth is arranged on the solid barricade end in described magnetizing roast area.Described go out
Material mouth is arranged on the solid barricade end in described reduction roasting area.I.e. feeding mouth and discharging opening are positioned at the both sides of same barricade.In other words
Say, in the sector region between feeding mouth and discharging opening, solid barricade is set.Sector region between feeding mouth and discharging opening
Radian is preferred with 10 °～20 °.The setting of feeding mouth and discharging opening can extend the time in rotary hearth furnace for the pelletizing as far as possible, improves also
Former effect.
As the preferred version of the present invention, described magnetizing roast area radian is 90 °～120 °.The atmosphere control in magnetizing roast area
It is made as neutrality, ore can be heated to uniform temperature and decompose, generate magnetic iron ore, magnetic iron ore is easier to be reduced.
As the preferred version of the present invention, described reduction roasting area radian is 220 °～260 °.Reduction roasting area is reduction
Atmosphere, pelletizing contacts generation reduction reaction in reduction roasting area with reducing agent, obtains metallized pellet.At the rotary hearth furnace of the present invention
The pelletizing of reason, reduction effect is good, and degree of metalization is high, the more conducively utilization of subsequent metal pellet.
Further, reducing zone and cooling zone are divided in described reduction roasting, and described cooling zone radian is 50 °～90 °, institute
State cooling zone one end to be connected with discharging opening, described cooling zone furnace roof and two side are provided with water-cooling wall.
Reducing zone and cooling zone are divided in reduction roasting and is conducive to the subsequent treatment of pelletizing.Water-cooling wall is arranged on cooling zone
Furnace roof and two side, control water-cooling wall current to make cooling zone temperature control to discharging requirement temperature.
Specifically, described barricade bottom and described furnace bottom vertical range are 10～20cm.Barricade bottom is to the stove of rotary hearth furnace
The distance of bottom upper surface should ensure passing through of material, ensures magnetizing roast area atmosphere and reduction roasting area atmosphere not again
Interfere with each other.
Further, described radiant tube is located at described magnetizing roast area.Radiant tube is regenerative gas combustion radiant tube,
Magnetizing roast area is heated using radiant tube, and magnetizing roast area can be made to keep neutral atmosphere.
Further, described burner is located at described reduction roasting area.Burner is regenerative gas burner, with respect to
Electrical heating, gas heating energy consumption is less.
Magnetization-reduction roasting one rotary hearth furnace that the present invention provides, can realize two kinds of atmosphere in body of heater by barricade mutual
Do not disturb；Reducing agent is sent into rotary hearth furnace by hollow barricade, prevents burning that reducing agent falls and uneven cloth；Material is turning bottom
In stove, magnetizing roast and reduction roasting integrally complete；, after magnetizing roast, reduction effect is good for material；Reduction roasting area makes full use of
The sensible heat of magnetizing roast area material, energy consumption is little, low cost.
Brief description
Fig. 1 is the rotary hearth furnace schematic top plan view of the present invention；
Fig. 2 is the partial view of the hollow barricade of the present invention.
In figure：
1- body of heater；101- reducing agent entrance；102- feeding mouth；103- discharging opening；2- furnace bottom；3- barricade；The hollow gear of 301-
Wall；The solid barricade of 302-；4- radiant tube；5- burner；6- magnetizing roast area；7- reduction roasting area；701- reducing zone；702- is cold
But area.
Specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in more details, so that energy
The advantage enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and enforcement
Example is only descriptive purpose, rather than limitation of the present invention.
As depicted in figs. 1 and 2, the embodiment of the present invention provides a kind of magnetization-reduction roasting one rotary hearth furnace, including body of heater 1,
Furnace bottom 2, barricade 3, radiant tube 4 and burner 5.
Body of heater 1 includes lateral wall, furnace roof and madial wall, and lateral wall connects madial wall, the cross-sectional area of body of heater by furnace roof
For annular.
Furnace bottom 2 is ring-type, and below body of heater 1, furnace bottom 2 constitutes annular space with body of heater 1.Furnace bottom 2 can be around rotary hearth furnace
Central shaft rotates, and the material entering rotary hearth furnace falls on furnace bottom 2, and the material that rotarily drives of furnace bottom 2 rotates in rotary hearth furnace.
Barricade 3 is arranged in body of heater 1, and barricade 3 connects lateral wall, furnace roof and madial wall.Barricade 3 will be empty for the annular of rotary hearth furnace
Between be divided into magnetizing roast area 6 and reduction roasting area 7.
Barricade 3 is vertically arranged in body of heater 1, and the annular space in rotary hearth furnace is divided into different regions, different area
Domain can arrange different atmosphere, and the atmosphere of zones of different will not interfere with each other the multi-functional utilization it is achieved that rotary hearth furnace.
Barricade 3 includes hollow barricade 301 and solid barricade 302.Hollow barricade 301 is provided with reducing agent entrance 101, hollow
The internal up/down perforation of barricade 301.
Further, barricade 3 bottom and the vertical range of furnace bottom 2 upper surface are 10～20cm.Barricade bottom is to rotary hearth furnace
The distance of furnace bottom upper surface should ensure passing through of material, ensure magnetizing roast area atmosphere and reduction roasting area gas again
Atmosphere does not interfere with each other.
Reducing agent entrance 101 is arranged on the top of hollow barricade 301, hollow barricade 301 inner hollow, enters as reducing agent
Enter the passage of rotary hearth furnace, can prevent reducing agent from the process that falls, burning and uneven cloth occurring.In pelletizing (material) by magnetizing
Roast area 6 enter reduction roasting area 8 when, can on pelletizing one layer of reducing agent of uniform fold, improve pelletizing degree of metalization.
Radiant tube 4 is arranged on body of heater 1, positioned at magnetizing roast area 6.Radiant tube 4 is regenerative gas combustion radiant tube,
Magnetizing roast area 6 is heated using radiant tube, magnetizing roast area 6 can be made to keep neutral atmosphere, neutral atmosphere is conducive to the magnetic of pelletizing
Change roasting.
Burner 5 is installed on body of heater 1, positioned at reduction roasting area 7.Burner 5 is regenerative gas burner, with respect to
Electrical heating, gas heating energy consumption is less.Regenerative gas burner noise is little, life-span length, flame stabilization, spreadability are good, burning
Completely, atmosphere is easily controllable.
Further, setting feeding mouth 102 and discharging opening 103 on body of heater 1, feeding mouth 102 is arranged on outside magnetizing roast area 6
On the wall of side, discharging opening 103 is arranged on reduction roasting area 7 lateral wall.
As the preferred version of the embodiment of the present invention, feeding mouth 102 is arranged on the solid barricade end in magnetizing roast area 6.Discharging
Mouth 103 is arranged on the solid barricade end in reduction roasting area 7.I.e. feeding mouth 102 and discharging opening 103 are positioned at the both sides of same barricade.Change
Sentence is talked about, and arranges solid barricade 302 in the sector region between feeding mouth 102 and discharging opening 103.Feeding mouth 102 and discharging
Between mouth 103, the radian of sector region is preferred with 10 °～20 °.The setting of feeding mouth 102 and discharging opening 103 can extend ball as far as possible
Time in rotary hearth furnace for the group, improve reduction effect.
As the preferred version of the embodiment of the present invention, magnetizing roast area 6 radian is 90 °～120 °.The gas in magnetizing roast area 6
Atmosphere is controlled to neutrality, ore can be heated to uniform temperature and decompose, generate magnetic iron ore, magnetic iron ore is easier to be reduced.
As the preferred version of the embodiment of the present invention, reduction roasting area 7 radian is 220 °～260 °.Reduction roasting area 7 is
Reducing atmosphere, pelletizing contacts generation reduction reaction in reduction roasting area 7 with reducing agent, obtains metallized pellet.The present invention is implemented
The pelletizing that the rotary hearth furnace of example is processed, reduction effect is good, and degree of metalization is high, the more conducively utilization of subsequent metal pellet.
Further, reduction roasting distinguishes 7 is reducing zone 701 and cooling zone 702, and cooling zone 702 radian is 50 °～90 °,
Cooling zone 702 one end is connected with discharging opening.Cooling zone 802 furnace roof and two side are provided with water-cooling wall.
Reduction roasting area 7 is divided into reducing zone 701 and cooling zone 702 to be conducive to the subsequent treatment of pelletizing.Water-cooling wall is installed
In cooling zone 702 furnace roof and two side, water-cooling wall current are controlled to make cooling zone 702 temperature control to the temperature of discharging requirement.
Arrow in Fig. 1 and Fig. 2 represents the direction of motion of material, and dash area is reducing agent.
Combination magnetizing roast provided in an embodiment of the present invention and reduction roasting in the rotary hearth furnace of one, by rotary hearth furnace
Setting barricade is realized two kinds of atmosphere in body of heater and is not interfere with each other；Hollow barricade enters the passage of rotary hearth furnace as reducing agent, prevents also
The former dose of burning falling and uneven cloth；Material completes magnetizing roast and reduction roasting in rotary hearth furnace；Material is through Roasting
After burning, it is more beneficial for reducing；Reduction roasting area makes full use of the sensible heat of magnetizing roast area material, and energy consumption is little, low cost.
Embodiment
The pelletizing of certain ore preparation is entered by rotary hearth furnace feeding mouth, and the furnace bottom with rotary hearth furnace rotates, successively through Roasting
Burn area and reduction roasting area, in the neutral atmosphere magnetizing roast of magnetizing roast area, reducing agent is entered by reducing agent entrance and turns bottom material
Stove, the material after magnetization enters reduction roasting area and is uniformly laid a floor reducing agent, in the reduction roasting area with reducing atmosphere
It is reduced into metallized pellet, finally discharge from discharging opening.
It should be noted that each embodiment above by reference to described by accompanying drawing only limits this in order to illustrate rather than
The scope of invention, it will be understood by those within the art that, right under the premise without departing from the spirit and scope of the present invention
Modification or equivalent that the present invention is carried out, all should cover within the scope of the present invention.Additionally, indication unless the context
Outward, the word occurring in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of can use in conjunction with all or part of of any other embodiment.
Claims (10)
1. a kind of magnetization-reduction roasting one rotary hearth furnace is it is characterised in that include body of heater, furnace bottom, barricade, radiant tube and burning
Device；
Described body of heater includes lateral wall, furnace roof and madial wall, and described lateral wall connects described madial wall, described body of heater by furnace roof
Cross-sectional area be annular；
Described furnace bottom is ring-type, and below described body of heater, described furnace bottom constitutes annular space with described body of heater；
In described body of heater, described barricade connects described lateral wall, furnace roof and madial wall to described dams setting, and described barricade is by institute
State annular space and be divided into magnetizing roast area and reduction roasting area, described barricade includes hollow barricade and solid barricade, described sky
Heart barricade is provided with reducing agent entrance, described hollow barricade inside up/down perforation；
Described radiant tube and burner are installed on described body of heater.
2. according to claim 1 rotary hearth furnace it is characterised in that setting feeding mouth and discharging opening on described body of heater, described enter
Material mouth is arranged on described magnetizing roast area lateral wall, and described discharging opening is arranged on described reduction roasting area lateral wall.
3. according to claim 2 rotary hearth furnace it is characterised in that described feeding mouth is arranged on the solid gear in described magnetizing roast area
Wall end.
4. according to claim 2 rotary hearth furnace it is characterised in that described discharging opening is arranged on the solid gear in described reduction roasting area
Wall end.
5. according to claim 1 rotary hearth furnace it is characterised in that described magnetizing roast area radian be 90 °～120 °.
6. according to claim 1 rotary hearth furnace it is characterised in that described reduction roasting area radian be 220 °～260 °.
7. according to claim 6 rotary hearth furnace it is characterised in that reducing zone and cooling zone, institute are divided in described reduction roasting
State cooling zone radian and be 50 °～90 °, described cooling zone one end is connected with discharging opening, described cooling zone furnace roof and two side are installed
There is water-cooling wall.
8. according to claim 1 rotary hearth furnace it is characterised in that described barricade bottom and described furnace bottom vertical range be 10～
20cm.
9. according to claim 1 rotary hearth furnace it is characterised in that described radiant tube be located at described magnetizing roast area.
10. according to claim 1 rotary hearth furnace it is characterised in that described burner be located at described reduction roasting area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027317.XA CN106403593A (en) | 2016-11-22 | 2016-11-22 | Magnetizing-reducing roasting integrated rotary hearth furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027317.XA CN106403593A (en) | 2016-11-22 | 2016-11-22 | Magnetizing-reducing roasting integrated rotary hearth furnace |
Publications (1)
| Publication Number | Publication Date |
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| CN106403593A true CN106403593A (en) | 2017-02-15 |
Family
ID=58068822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611027317.XA Pending CN106403593A (en) | 2016-11-22 | 2016-11-22 | Magnetizing-reducing roasting integrated rotary hearth furnace |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128978C (en) * | 1996-09-06 | 2003-11-26 | Demag意大利工厂股份公司 | Rotary hearth furnace |
| JP2012017526A (en) * | 2011-09-14 | 2012-01-26 | Kobe Steel Ltd | Method for operating rotary hearth type reducing furnace |
| CN103074460A (en) * | 2013-01-05 | 2013-05-01 | 莱芜钢铁集团有限公司 | Rotary hearth furnace equipment for segment handling of iron ore and handling method |
| CN206257958U (en) * | 2016-11-22 | 2017-06-16 | 江苏省冶金设计院有限公司 | A kind of Magnetization reductive roasting one rotary hearth furnace |
-
2016
- 2016-11-22 CN CN201611027317.XA patent/CN106403593A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128978C (en) * | 1996-09-06 | 2003-11-26 | Demag意大利工厂股份公司 | Rotary hearth furnace |
| JP2012017526A (en) * | 2011-09-14 | 2012-01-26 | Kobe Steel Ltd | Method for operating rotary hearth type reducing furnace |
| CN103074460A (en) * | 2013-01-05 | 2013-05-01 | 莱芜钢铁集团有限公司 | Rotary hearth furnace equipment for segment handling of iron ore and handling method |
| CN206257958U (en) * | 2016-11-22 | 2017-06-16 | 江苏省冶金设计院有限公司 | A kind of Magnetization reductive roasting one rotary hearth furnace |
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