CN206256122U - The system that point stove processes siderite is melted in a kind of rotary hearth furnace joint combustion gas - Google Patents
The system that point stove processes siderite is melted in a kind of rotary hearth furnace joint combustion gas Download PDFInfo
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- CN206256122U CN206256122U CN201621267276.7U CN201621267276U CN206256122U CN 206256122 U CN206256122 U CN 206256122U CN 201621267276 U CN201621267276 U CN 201621267276U CN 206256122 U CN206256122 U CN 206256122U
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- rotary hearth
- hearth furnace
- discharging opening
- feeding mouth
- combustion gas
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Abstract
The utility model discloses a kind of rotary hearth furnace joint combustion gas and melts the system that point stove processes siderite.The system includes molten point of stove of rotary hearth furnace and combustion gas, rotary hearth furnace includes feeding mouth, discharging opening, reducing agent entrance and barricade, barricade is located in the body of heater of rotary hearth furnace, annular space in body of heater is divided into magnetizing roast area and reduction roasting area, rotary hearth furnace feeding mouth is located at magnetizing roast area, rotary hearth furnace discharging opening is located at reduction roasting area, and reducing agent entrance is located at furnace roof of the reduction roasting area away from discharge port end.System of the present utility model, completes the magnetizing roast and reduction roasting of siderite in rotary hearth furnace, and the degree of metalization of dry bulb group is high, and magnetic efficiency is good, and point stove is melted in combustion gas, and to melt the molten iron grade separately won high.
Description
Technical field
The utility model belongs to technical field of smelting, more particularly to a kind of molten point of stove treatment siderite of rotary hearth furnace joint combustion gas
System.
Background technology
Recently as the fast development of steel industry, China is big to the mining inetesity of iron mineral resource, comprehensive utilization ratio
Low and geologic prospect difficulty continuous increase so that the iron ore deposit that geological conditions is good, resource grade is high, sorting is good just by
Decrescence few, mineral resources sustainable supply ability declines, and reserved resources are not enough, and active development is using refractory iron ore and low-grade
Iron ore resource, could effectively expand China can industrial utilization iron ore resource amount, reduce external dependence degree, ensure iron ore
The safety of supply.
The crystal of siderite is in rhombohedron shape, short cylinder or scalenohedron shape.Generally in pelletized form, earthy, compact massive
Aggregate.Iron ore resource proved reserves 18.34 hundred million tons of the China containing siderite, account for China's iron ore proved reserves
3.4%, separately there is 18.21 hundred million tons of reserves, it is concentrated mainly on more than 10, Guizhou, Xinjiang, Shaanxi, Liaoning, Jilin of China etc.
Area, especially accounts for national such iron ore resource gross reserves in several western save (autonomous regions) such as Guizhou, Shaanxi, Gansu and Qinghai
More than 50%.Because magnesium, manganese endoplasm with as phenomenon it is very universal, most siderites theory grades are in 32%~45%, sale
Difficulty, influences developer's enthusiasm.
Have currently for the main application technology of difficult ore dressing containing siderite：Reduction roasting-magnetic separation, high intensity magnetic separation and flotation and
Combined sorting technology etc..Because its density, specific susceptibility are relatively low, many siderites are often close with chlorite, garnet etc. in addition
The gangue mineral symbiosis that degree and specific susceptibility are more or less the same therewith, washability is poor.
Utility model content
In order to solve the above problems, what point stove treatment siderite was melted in a kind of rotary hearth furnace joint combustion gas of the utility model offer is
System and method, complete the magnetizing roast and reduction roasting of siderite in rotary hearth furnace, and the degree of metalization of dry bulb group is high, molten point of combustion gas
It is high that stove melts the molten iron grade separately won.
The utility model provides a kind of rotary hearth furnace joint combustion gas and melts the system that point stove processes siderite, including rotary hearth furnace and combustion
Molten point of stove of gas；
The rotary hearth furnace includes feeding mouth, discharging opening, reducing agent entrance and barricade,
The barricade is located in the body of heater of the rotary hearth furnace, and the annular space in the body of heater is divided into magnetizing roast area
With reduction roasting area, positioned at the magnetizing roast area, the rotary hearth furnace discharging opening is positioned at the reduction for the rotary hearth furnace feeding mouth
Roast area, the reducing agent entrance is located at furnace roof of the reduction roasting area away from discharge port end；
Molten point of stove of the combustion gas includes feeding mouth and discharging opening；
The rotary hearth furnace discharging opening connects molten point of stove feeding mouth of the combustion gas.
Rotary hearth furnace is used for the magnetizing roast and reduction roasting of siderite, obtains metallized pellet.Molten point of stove of combustion gas is used for gold
Molten point of category pellet, obtains molten iron.
In the utility model, the system further includes atomizer mill, pelletizer and drying device.The atomizer mill includes
Discharging opening；The pelletizer includes feeding mouth and discharging opening；The drying device includes feeding mouth and discharging opening；The atomizer mill
Discharging opening connects the pelletizer feeding mouth, and the pelletizer discharging opening connects the drying device feeding mouth, the dry dress
Put discharging opening and connect the rotary hearth furnace feeding mouth.
The granularity that atomizer mill is used for needed for siderite to be finely ground to subsequent treatment.Pelletizer is used for the siderite that will be mixed
Grain pelletizing.Drying device is used for the drying of pelletizing, is that follow-up roasting is prepared.
Specifically, the radian of magnetizing roast area annular region is 120 °~180 °.
Specifically, the sector region radian between the rotary hearth furnace feeding mouth and rotary hearth furnace discharging opening is 10 °~15 °.Turn
A barricade is provided with sector region between bottom stove feeding mouth and rotary hearth furnace discharging opening.
Further, the barricade bottom and the distance of the furnace bottom upper surface of the rotary hearth furnace are 10~20cm.Barricade bottom
Portion should ensure passing through for material to the distance of the furnace bottom upper surface of rotary hearth furnace, magnetizing roast area's atmosphere is ensured again and is gone back
Former roast area atmosphere is not interfered with each other.
In addition, the utility model provides a kind of method that utilization said system processes siderite, comprise the following steps：
A, by siderite fine grinding, pelletizing, obtain dry bulb group after drying；
B, by the dry bulb group feeding rotary hearth furnace, first carry out magnetizing roast, after carry out reduction roasting, metallized
Pelletizing, reducing agent enters rotary hearth furnace by the reducing agent entrance, will be described when dry bulb group enters the reduction roasting area
One layer of reducing agent of dry bulb group's uniform fold；
C, by metallized pellet with addition of melting down 0.5~1.5h after molten point of stove fusing of quick lime feeding combustion gas, obtain molten iron and
Slag.
In the utility model, the rotary hearth furnace magnetizing roast area temperature is 500~800 DEG C, and reduction roasting area temperature is
1200~1300 DEG C, the furnace bottom of the rotary hearth furnace rotates a circle the time for 1.5~3h.
Specifically, the mass percent that the siderite that the siderite is finely ground to granularity≤200 mesh is accounted for is existed in step A
More than 85%, the dry bulb granule footpath is 8~16mm.
Further, the mass component of carbon is not less than 80% in the reducing agent, and the reducing agent granularity is 2~5mm.
Preferably, the mass ratio of metallized pellet and quick lime described in step C is 1:0.05~0.15.
In the utility model, siderite (FeCO3) can decompose reaction when uniform temperature is heated to, and release titanium dioxide
Carbon gas, generates Fe3O4, the Fe after magnetizing roast3O4It is easier to be reduced.
The system and method that point stove processes siderite are melted in rotary hearth furnace joint combustion gas of the present utility model, by the magnetization of siderite
Roasting and reduction roasting are integrally completed in rotary hearth furnace, and the degree of metalization of dry bulb group is high；Reduction roasting area makes full use of Roasting
Burn the sensible heat of area's dry bulb group, reducing energy consumption；Molten point of stove of the hot entrance combustion gas of metallized pellet, melts good separating effect.
Brief description of the drawings
Fig. 1 is that the system schematic that point stove processes siderite is melted in the utility model rotary hearth furnace joint combustion gas；
Fig. 2 is rotary hearth furnace reduction agent entrance partial view of the present utility model；
Fig. 3 is the method flow diagram that system of the present utility model processes siderite.
In figure：
1- atomizer mills；2- pelletizers；3- drying devices；4- rotary hearth furnaces；
401- rotary hearth furnace feeding mouths；402- rotary hearth furnace discharging openings；403- barricades；404- magnetizing roasts area；405- reduction roastings
Burn area；406- reducing agent entrances；
Molten point of stove of 5- combustion gas.
Specific embodiment
Below in conjunction with drawings and Examples, specific embodiment of the present utility model is described in more details, with
Just better understood when the advantage of scheme of the present utility model and its various aspects.However, specific implementations described below side
Formula and embodiment are only descriptive purposes, rather than to limitation of the present utility model.
As shown in Figure 1, on the one hand, what the utility model provided that a kind of rotary hearth furnace joint combustion gas melts that point stove processes siderite is
System, including：Molten point of stove 5 of atomizer mill 1, pelletizer 2, drying device 3, rotary hearth furnace 4 and combustion gas.
Atomizer mill 1 includes feeding mouth and discharging opening.The grain that atomizer mill 1 is used for needed for siderite to be finely ground to subsequent treatment
Degree.
Pelletizer 2 includes feeding mouth and discharging opening.Pelletizer 2 is used for siderite particle pelletizing.Spherical material is more sharp
In the thermally equivalent in rotary hearth furnace.It is good that suitable pellet size makes pelletizing conduct heat, and reaches good reduction effect.
Drying device 3 includes feeding mouth and discharging opening.Drying device 3 is used for the drying of pelletizing, is that follow-up roasting is prepared.
Rotary hearth furnace 4 is used for the magnetizing roast and reduction roasting of siderite, obtains metallized pellet, and siderite is in rotary hearth furnace 4
It is middle first to carry out magnetizing roast, then reduction roasting is carried out, magnetic efficiency is good, and degree of metalization is high.
Molten point of stove 5 of combustion gas includes feeding mouth and discharging opening.Combustion gas melts point stove 5 for molten point of metallized pellet, extracts
Iron in metallized pellet, obtains molten iron.
As depicted in figs. 1 and 2, rotary hearth furnace 4 includes feeding mouth 401, discharging opening 402, barricade 403 and reducing agent entrance 406.
Barricade 403 is located in the body of heater of rotary hearth furnace, connects furnace roof, lateral wall and the madial wall of body of heater, and the annular in the body of heater is empty
Between be divided into magnetizing roast area 404 and reduction roasting area 405.Rotary hearth furnace feeding mouth 401 is located at magnetizing roast area 404, rotary hearth furnace
Discharging opening 402 is located at reduction roasting area 405, and reducing agent entrance 406 is located at furnace roof of the reduction roasting area 405 away from discharge port end.
In the utility model in example, reducing agent entrance 406 is located at furnace roof, is easy to reducing agent to enter rotary hearth furnace 4.Reducing agent
Entrance 406 is arranged on reduction roasting area 405 away from rotary hearth furnace discharge port end.Reducing agent entrance 406 is with barricade 403 in the horizontal direction
On have certain distance so that dry bulb group enter reduction by burn area 405 when, by dry bulb roll into a ball one layer of reducing agent of uniform fold.
Dotted arrow in Fig. 1 and Fig. 2 represents the direction of motion of material in rotary hearth furnace.Rotary hearth furnace 4 furnace bottom rotarily drives
Material movement.Material enters magnetizing roast area 404 by rotary hearth furnace feeding mouth 401, and reduction roasting area is entered after magnetizing roast
405, the material after reduction roasting discharges rotary hearth furnace through rotary hearth furnace discharging opening 402.The material processed through rotary hearth furnace 4 is molten into combustion gas
Divide stove 5, product is obtained after treatment.
The discharging opening of atomizer mill 1 connects the feeding mouth of pelletizer 2, and the discharging opening of the pelletizer 2 connection feeding mouth of drying device 3 is dried
The discharging opening of device 3 connects the feeding mouth of rotary hearth furnace 4.Molten point of feeding mouth of stove 5 of the discharging opening of rotary hearth furnace 4 connection combustion gas.
Specifically, the radian of the annular region of magnetizing roast area 404 of the utility model embodiment is 120 °~180 °.
Specifically, the fan section between the rotary hearth furnace feeding mouth 401 and rotary hearth furnace discharging opening 402 of the utility model embodiment
Domain radian is 10 °~15 °.A gear is provided with sector region between rotary hearth furnace feeding mouth 401 and rotary hearth furnace discharging opening 402
Wall.The position of rotary hearth furnace feeding mouth 401 and rotary hearth furnace discharging opening 402 is set, extend as far as possible dry bulb group in rotary hearth furnace when
Between.
Further, in the utility model embodiment, barricade bottom is with the distance of the furnace bottom upper surface of the rotary hearth furnace
10~20cm.Barricade bottom should ensure passing through for material to the distance of the furnace bottom upper surface of rotary hearth furnace, and magnetic is ensured again
Change roast area atmosphere and reduction roasting area atmosphere is not interfered with each other.
On the other hand, as shown in figure 3, the utility model embodiment provides the side that a kind of utilization said system processes siderite
Method, comprises the following steps：
1st, more than 85%, pelletizing is dried the mass percent for accounting for the siderite that siderite is finely ground to granularity≤200 mesh
Dry bulb group is obtained afterwards, and dry bulb granule footpath is 8~16mm；
2nd, by the dry bulb group feeding rotary hearth furnace, first carry out magnetizing roast, after carry out reduction roasting, metallized
Pelletizing, magnetizing roast area temperature is 500~800 DEG C, and reduction roasting area temperature is 1200~1300 DEG C, and reducing agent is by the reduction
Agent entrance enters rotary hearth furnace, when dry bulb group enters the reduction roasting area by the floor reduction of uniform fold one of dry bulb group
Agent, the furnace bottom of rotary hearth furnace rotates a circle the time for 1.5~3h；
3rd, by metallized pellet with addition of melting down 0.5~1.5h after molten point of stove fusing of quick lime feeding combustion gas, obtain molten iron and
The mass ratio of slag, metallized pellet and quick lime is 1:0.05~0.15.
Further, the mass component of carbon is not less than 80% in the reducing agent, and reducing agent granularity is 2~5mm.
In the utility model embodiment, siderite (FeCO3) can decompose reaction when uniform temperature is heated to, release
Carbon dioxide, generates Fe3O4, the Fe after magnetizing roast3O4It is easier to be reduced.
The system and method that point stove processes siderite are melted in the rotary hearth furnace joint combustion gas that the utility model embodiment is provided, by water chestnut
After iron ore prepares pelletizing, rotary hearth furnace is sent into, siderite integration in rotary hearth furnace completes magnetizing roast and reduction roasting, dry bulb group
Degree of metalization it is high；Reduction roasting area makes full use of the sensible heat of dry bulb group of magnetizing roast area, reducing energy consumption；Metallized pellet is hot
Into molten point of stove of combustion gas, good separating effect is melted, it is cost-effective；System architecture is simple, is conducive to batch processing siderite.
Embodiment 1
The mass ratio that the particle that certain siderite is milled to granularity≤200 mesh is accounted for is 86.57%, pelletizing (pelletizing particle diameter 8~
12mm), enter from rotary hearth furnace feeding mouth after drying, magnetizing roast area radian is 130 °, 500 DEG C of temperature control, reduction roasting area
1250 DEG C of temperature control, furnace bottom rotates a circle the time for 2h, when the dry bulb group after magnetizing roast enters reduction roasting area, reduction coal
(the mass component of C：81.03%, granularity 2mm) dry bulb group is paved with from reducing agent entrance, the dry bulb group of reduction coal is paved with reduction
Roast area is reduced into metallized pellet and is discharged from rotary hearth furnace discharging opening.The thermal state metal pellet of discharge will be reduced according to 1:
0.05 enters melting down 0.5h after molten point of stove of combustion gas melts with addition of quick lime obtains molten iron and slag.
Embodiment 2
The mass ratio that the particle that certain siderite is milled to granularity≤200 mesh is accounted for is 87.63%, pelletizing (pelletizing particle diameter 10~
14mm), enter from rotary hearth furnace feeding mouth after drying, magnetizing roast area radian is 170 °, 700 DEG C of temperature control, reduction roasting area
1200 DEG C of temperature control, furnace bottom rotates a circle the time for 3h, when the dry bulb group after magnetizing roast enters reduction roasting area, reduction coal
(the mass component of C：81.31%, granularity 5mm) dry bulb group is paved with from reducing agent entrance, the dry bulb group of reduction coal is paved with reduction
Roast area is reduced into metallized pellet and is discharged from rotary hearth furnace discharging opening.The thermal state metal pellet of discharge will be reduced according to 1:
0.1 enters melting down 0.9h after molten point of stove of combustion gas melts with addition of quick lime obtains molten iron and slag.
Embodiment 3
The mass ratio that the particle that certain siderite is milled to granularity≤200 mesh is accounted for is 88.78%, pelletizing (pelletizing particle diameter 12~
16mm), enter from rotary hearth furnace feeding mouth after drying, magnetizing roast area radian is 150 °, 800 DEG C of temperature control, reduction roasting area
1300 DEG C of temperature control, furnace bottom rotates a circle the time for 1.5h, when the dry bulb group after magnetizing roast enters reduction roasting area, semi-coke
(the mass component of C：82.31%, granularity 4mm) dry bulb group is paved with from reducing agent entrance, the dry bulb group for being paved with semi-coke roasts in reduction
Burn area and be reduced into metallized pellet from rotary hearth furnace discharging opening discharge.The thermal state metal pellet of discharge will be reduced according to 1:0.15
Melting down 1.5h obtains molten iron and slag after entering molten point of stove fusing of combustion gas with addition of quick lime.
It should be noted that each embodiment above by reference to described by accompanying drawing is only used to illustrate the utility model rather than limit
Scope of the present utility model is made, it will be understood by those within the art that, do not departing from spirit of the present utility model and model
The modification carried out to the utility model on the premise of enclosing or equivalent, all should cover within the scope of the utility model.
Additionally, signified outer unless the context, the word for occurring in the singular includes plural form, and vice versa.In addition, removing non-specifically
Explanation, then all or part of of any embodiment can combine all or part of of any other embodiment and use.
Claims (5)
1. the system that point stove processes siderite, including molten point of stove of rotary hearth furnace and combustion gas are melted in a kind of rotary hearth furnace joint combustion gas,
The rotary hearth furnace includes feeding mouth, discharging opening, reducing agent entrance and barricade,
The barricade is located in the body of heater of the rotary hearth furnace, the annular space in the body of heater is divided into magnetizing roast area and is gone back
Former roast area, the rotary hearth furnace feeding mouth is located at the magnetizing roast area, and the rotary hearth furnace discharging opening is located at the reduction roasting
Area, the reducing agent entrance is located at furnace roof of the reduction roasting area away from discharge port end；
Molten point of stove of the combustion gas includes feeding mouth and discharging opening；
The rotary hearth furnace discharging opening connects molten point of stove feeding mouth of the combustion gas.
2. system according to claim 1, it is characterised in that the system further includes atomizer mill, pelletizer and dry
Dry device,
The atomizer mill includes discharging opening；
The pelletizer includes feeding mouth and discharging opening；
The drying device includes feeding mouth and discharging opening；
The atomizer mill discharging opening connects the pelletizer feeding mouth, and the pelletizer discharging opening connects the drying device pan feeding
Mouthful, the drying device discharging opening connects the rotary hearth furnace feeding mouth.
3. system according to claim 1, it is characterised in that the radian of magnetizing roast area annular region is 120 °~
180°。
4. system according to claim 1, it is characterised in that between the rotary hearth furnace feeding mouth and rotary hearth furnace discharging opening
Sector region radian is 10 °~15 °.
5. system according to claim 1, it is characterised in that the furnace bottom upper surface of the barricade bottom and the rotary hearth furnace
Distance be 10~20cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621267276.7U CN206256122U (en) | 2016-11-22 | 2016-11-22 | The system that point stove processes siderite is melted in a kind of rotary hearth furnace joint combustion gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621267276.7U CN206256122U (en) | 2016-11-22 | 2016-11-22 | The system that point stove processes siderite is melted in a kind of rotary hearth furnace joint combustion gas |
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| Publication Number | Publication Date |
|---|---|
| CN206256122U true CN206256122U (en) | 2017-06-16 |
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ID=59027481
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621267276.7U Expired - Fee Related CN206256122U (en) | 2016-11-22 | 2016-11-22 | The system that point stove processes siderite is melted in a kind of rotary hearth furnace joint combustion gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106399668A (en) * | 2016-11-22 | 2017-02-15 | 江苏省冶金设计院有限公司 | System and method for treating siderite in manner of combining rotary hearth furnace with gas melt separation furnace |
-
2016
- 2016-11-22 CN CN201621267276.7U patent/CN206256122U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106399668A (en) * | 2016-11-22 | 2017-02-15 | 江苏省冶金设计院有限公司 | System and method for treating siderite in manner of combining rotary hearth furnace with gas melt separation furnace |
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Effective date of registration: 20190102 Granted publication date: 20170616 |
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