CN206143275U - System for rotary hearth furnace is united electric stove and is handled ilmenite concentrate - Google Patents
System for rotary hearth furnace is united electric stove and is handled ilmenite concentrate Download PDFInfo
- Publication number
- CN206143275U CN206143275U CN201621252992.8U CN201621252992U CN206143275U CN 206143275 U CN206143275 U CN 206143275U CN 201621252992 U CN201621252992 U CN 201621252992U CN 206143275 U CN206143275 U CN 206143275U
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- China
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- rotary hearth
- hearth furnace
- furnace
- feeding mouth
- discharging opening
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Abstract
The utility model discloses a system for rotary hearth furnace is united electric stove and is handled ilmenite concentrate. This system includes: rotary hearth furnace and electric stove, the rotary hearth furnace includes pan feeding mouth, discharge gate and barricade, the barricade is located in the furnace body of rotary hearth furnace, will annular space separation in the furnace body distinguishes for oxidizing roasting and the reducing roasting district, rotary hearth furnace pan feeding mouth is located the oxidizing roasting district, it is located to change end furnace discharge mouth the reducing roasting district, the electric stove includes pan feeding mouth and discharge gate, it connects to change end furnace discharge mouth electric stove pan feeding mouth. The utility model discloses a handle the system of ilmenite concentrate, separate the rotary hearth furnace for oxidizing roasting district and reducing roasting district, realized that the oxidizing roasting of material accomplishes with reducing roasting is integrative, the sensible heat of reducing roasting district make full use of oxidizing roasting district dry bulb group, the energy consumption is little, with low costs.
Description
Technical field
This utility model belongs to technical field of smelting, more particularly to a kind of rotary hearth furnace joint electric furnace process ilmenite concentrate be
System.
Background technology
Titanium alloy has intensity height and density is little, good mechanical property, and toughness and etch resistant properties are fine.Titanium alloy is mainly used
It is secondly the structural member of rocket, guided missile and high-speed aircraft in aircraft engine compressor part is made.Titanium and its alloy are general
In commercial Application, for make the heater of the electrode of electrolytic industry, the condenser of electric station, petroleum refining and desalinization with
And environment pollution control device etc..Titanium and its alloy have become a kind of corrosion resistance structure material.Additionally it is used to produce hydrogen storage material
With marmem etc..
The titanium resource reserves of China enrich very much, but mainly ilmenite, and rutile ore is less.The shortcoming of domestic ilmenite
It is that grade is low, impurity content is high, is directly used in when producing Titanium and titanium white, productivity ratio is low, " three wastes " amount is big, production cost
It is high, it is impossible to directly to meet requirement of the chloride process titanium dioxide to raw material, thus usually need its preconcentration into high-grade rich-titanium material.
The production method of rich-titanium material is divided into two big class based on dry and wet, projects as environmental problem day is aobvious, not only
Improve titanium products annual production, it is necessary to energy resource consumption and problem of environmental pollution.Wet production is because of complex process, production cost
High, environmental pollution has seriously been eliminated substantially, dry process production high titanium slag, and ilmenite concentrate is reduced directly, and is ground after reduction
Separating table ferrum, titanium are selected, product rich-titanium material is acid-soluble good, is adapted as the raw material of sulfate process titanium dioxide.But it is high to there is reduction temperature,
Reducing atmosphere is poor, and titanium, iron recovery be not high, and rich-titanium material samples low shortcoming.
Utility model content
In order to solve the above problems, the utility model proposes the system that a kind of rotary hearth furnace joint electric furnace processes ilmenite concentrate, real
Existing ilmenite concentrate oxidizing roasting is successively completed with reduction roasting, and the oxidation of oxidizing roasting area is abundant, and reduction roasting area reduction effect is good, electricity
Stove fusing is separated and obtains molten iron and Ti-enriched slag.
One of the purpose of this utility model is to provide the system that a kind of rotary hearth furnace joint electric furnace processes ilmenite concentrate, including：Turn
Bottom stove and electric furnace,
The rotary hearth furnace includes feeding mouth, discharging opening 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 into oxidizing roasting area
With reduction roasting area, positioned at the oxidizing roasting area, the rotary hearth furnace discharging opening is positioned at the reduction for the rotary hearth furnace feeding mouth
Roast area；
The electric furnace includes feeding mouth and discharging opening；
The rotary hearth furnace discharging opening connects the electric furnace feeding mouth.
Annular space in rotary hearth furnace is divided into oxidizing roasting area and reduction roasting area by barricade.The rotation of rotary furnace bottom
Turn to drive material movement.Material enters oxidizing roasting area by rotary hearth furnace feeding mouth, reduction roasting area is entered after oxidized roasting, also
Material Jing rotary hearth furnaces discharging opening after former roasting discharges rotary hearth furnace.
In this utility model, the system further includes atomizer mill, pelletizer, 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 drying device discharging opening connects the rotary hearth furnace feeding mouth.
Atomizer mill is used to that ilmenite concentrate to be finely ground to the granularity needed for subsequent treatment.Pelletizer is used for the ilmenite concentrate that will be mixed
Grain pelletizing.Drying device is used for the drying of pelletizing, is that follow-up roasting is prepared.
In this utility model, the rotary hearth furnace further includes to reduce intermixture entrance, the reduction intermixture entrance position
In the reduction roasting area away from rotary hearth furnace discharge port end furnace roof.Reduction intermixture entrance is located at furnace roof, is easy to reduction mixing
Agent enters rotary hearth furnace.Reduction intermixture entrance is arranged on reduction roasting area away from rotary hearth furnace discharge port end so that dry bulb group enters
Reduction can be contacted when being burnt area with reduction intermixture.
Specifically, the quantity of the barricade be two, between described two barricades the radian of annular space be 150 °～
180 ° constitute the oxidizing roasting area, and the barricade bottom is 10～20cm with the distance of the furnace bottom upper surface of the rotary hearth furnace.
Barricade bottom to the distance of the furnace bottom upper surface of rotary hearth furnace should ensure passing through for material, and oxidizing roasting area gas is ensured again
Atmosphere and reduction roasting area atmosphere are not interfered with each other.
Further, between the rotary hearth furnace feeding mouth and the rotary hearth furnace discharging opening sector region radian be 10 °～
20°。
Another object of the present utility model is to provide a kind of method that utilization said system processes ilmenite concentrate, including step：
A, by ilmenite concentrate fine grinding pelletizing, dry bulb group is obtained after being dried；
B, dry bulb group is sent into into the rotary hearth furnace, first carries out oxidizing roasting, after carry out reduction roasting, metallized
Pelletizing, reduction intermixture enters rotary hearth furnace by the reduction intermixture entrance, and in the dry bulb, group enters the reduction roasting area
When by dry bulb group one layer of uniform fold reduction intermixture；
C, the metallized pellet is sent into the furnace melting, melting down 20～40min after fusing taps a blast furnace and stays slag to obtain ferrum
Water and Ti-enriched slag.
Specifically, oxidizing roasting area temperature is 800～1000 DEG C, and reduction roasting area temperature is 1100～1300
DEG C, the furnace bottom of the rotary hearth furnace rotates a circle the time for 2～5h.
In this utility model, the quality percentage for accounting for the ilmenite concentrate that the ilmenite concentrate is finely ground to granularity≤200 mesh in step A
Than more than 80%, the dry bulb granule footpath is 10～20mm.
Used as preferred embodiment, the reduction intermixture is comprising sodium carbonate and reducing agent, the sodium carbonate：Reducing agent
Mass ratio=1:4～10.
In this utility model, the mass component of carbon is not less than 80% in the reducing agent, and the reducing agent granularity is 2～
5mm；The sodium carbonate granularity is 0.5～2.5mm.
Oxidizing roasting is carried out in oxidizing atmosphere, makes some of Ore composition that oxidation to occur by oxidizing roasting anti-
Should.Oxidizing process is also that difficult choosing and composite oxides fully decompose and occur crystal conversion process, coefficient of expansion during crystal conversion
Change make Ore burst efflorescence, so as to improve the reducing property of Ore.Reduce after the oxidized roasting of ilmenite concentrate, the oxidation of ferrum
Thing is reduced into metallic iron and titanyl compound is not reduced, and is separated by furnace melting, obtains molten iron and Ti-enriched slag, sodium carbonate
Addition in order to strengthen the reduction of iron oxides.
The system that the rotary hearth furnace joint electric furnace that this utility model is provided processes ilmenite concentrate, by rotary hearth furnace oxidizing roasting is divided into
Area and reduction roasting area, the oxidizing roasting and reduction roasting for realizing material is integrally completed；After the oxidized roast area oxidation of material
Reduction, reduction effect is good；Reduction roasting area makes full use of the sensible heat of dry bulb group of oxidizing roasting area, fusing to separate and adopt hot charging metal
Pellet, energy consumption is little, low cost.
Description of the drawings
Fig. 1 is the schematic diagram of the system that rotary hearth furnace joint electric furnace of the present utility model processes ilmenite concentrate；
Fig. 2 is the partial schematic diagram of rotary hearth furnace reduction agent entrance of the present utility model；
Fig. 3 is the method flow schematic diagram that this utility model system processes ilmenite concentrate.
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- oxidizing roastings area；405- reduction roastings
Burn area；406- reduces intermixture entrance；
5- electric furnaces.
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 restriction of the present utility model.
As shown in figure 1, this utility model embodiment provides the system that a kind of rotary hearth furnace joint electric furnace processes ilmenite concentrate, bag
Include：Atomizer mill 1, pelletizer 2, drying device 3, rotary hearth furnace 4 and electric furnace 5.
Atomizer mill 1 includes feeding mouth and discharging opening.Atomizer mill 1 is used to that ilmenite concentrate to be finely ground to the grain needed for subsequent treatment
Degree.
Pelletizer 2 includes feeding mouth and discharging opening.Pelletizer 2 is used for the ilmenite concentrate granule pelletizing that will be mixed.Spherical thing
Material is more conducive to the thermally equivalent in rotary hearth furnace.Suitable pellet size makes pelletizing heat transfer good, 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 oxidizing roasting and reduction roasting of dry bulb group.
As depicted in figs. 1 and 2, rotary hearth furnace 4 includes feeding mouth 401, discharging opening 402, barricade 403 and reducing agent mixing entrance
406.Barricade 403 is located in the body of heater of rotary hearth furnace, and the annular space in body of heater is divided into into oxidizing roasting area 404 and reduction roasting
Area 405.Rotary hearth furnace feeding mouth 401 is located at oxidizing roasting area 404, and rotary hearth furnace discharging opening 402 is located at reduction roasting area 405, reduction
Intermixture entrance 406 is located at reduction roasting area 405.
Dotted arrow in Fig. 1 and Fig. 2 represents the direction of motion of material in rotary hearth furnace.The body of heater of rotary hearth furnace 4 and furnace bottom are limited
Make annular space.Rotary hearth furnace 4 furnace bottom rotarily drives material movement.Material enters oxidizing roasting by rotary hearth furnace feeding mouth 401
Area 404, enters reduction roasting area 405 after oxidized roasting, the material Jing rotary hearth furnaces discharging opening 402 after reduction roasting is discharged and turns bottom
Stove.The material of the process of Jing rotary hearth furnaces 4 enters electric furnace 5, and Jing after processing product is obtained.
As shown in Fig. 2 reduction intermixture entrance 406 is located at furnace roof, it is easy to reduce intermixture into rotary hearth furnace 4.Reduction is mixed
Mixture entrance 406 is arranged on reduction roasting area 405 away from rotary hearth furnace discharge port end, has certain distance with barricade 403 so that dry bulb
Group enters and can be contacted with reduction intermixture when area 405 is burnt in reduction.
Electric furnace 5 includes feeding mouth and discharging opening.Electric furnace 5 is used for fusing metal pellet, obtains molten iron and Ti-enriched slag.
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, the discharging opening of the rotary hearth furnace 4 connection feeding mouth of electric furnace 5.
Specifically, the quantity of barricade 403 is two, and the radian of annular space is 150 °～180 ° compositions between two barricades
Oxidizing roasting area 404, the bottom of barricade 403 is 10～20cm with the distance of the furnace bottom upper surface of rotary hearth furnace.The bottom of barricade 403 to turn
The distance of the furnace bottom upper surface of bottom stove should ensure passing through for material, and oxidizing roasting area's atmosphere and reduction roasting are ensured again
Area's atmosphere is not interfered with each other.
Further, fan section between rotary hearth furnace feeding mouth 401 and rotary hearth furnace discharging opening 402 in this utility model embodiment
The radian in domain is 10 °～20 °.
In this utility model embodiment, oxidizing roasting is carried out in oxidizing atmosphere, is made in Ore by oxidizing roasting
Some compositions there are oxidation reactions.Oxidizing process is also that difficult choosing and composite oxides fully decompose and occur crystal conversion mistake
Journey, the change of coefficient of expansion during crystal conversion makes iron ore explosion efflorescence, so as to improve the reducing property of iron ore.Ilmenite concentrate
Reduce after oxidized roasting, the oxide of ferrum is reduced into metallic iron and titanyl compound is not reduced, by furnace melting point
From obtaining molten iron and Ti-enriched slag.
On the other hand, as shown in figure 3, embodiment of the present utility model provides a kind of utilization said system processes ilmenite concentrate
Method, comprises the steps：
A, by ilmenite concentrate fine grinding pelletizing, dry bulb group is obtained after being dried；
B, dry bulb group is sent into into rotary hearth furnace, first carries out oxidizing roasting, after carry out reduction roasting, obtain metallized pellet, also
Former intermixture enters rotary hearth furnace by intermixture entrance is reduced, and dry bulb is rolled into a ball into uniform fold one when dry bulb group enters reduction roasting area
Layer reduction intermixture；
C, metallized pellet is sent into furnace melting, melting down 20～40min after fusing taps a blast furnace and stays slag to obtain molten iron and rich titanium
Slag.
Specifically, oxidizing roasting area temperature is 800～1000 DEG C, and oxygen is blasted during material oxidizing roasting, and oxygen volume is
The 10～15% of volume of fuel, reduction roasting area temperature is 1100～1300 DEG C, the furnace bottom of rotary hearth furnace rotates a circle the time for 2～
5h。
In this utility model, the mass percent that the ilmenite concentrate that ilmenite concentrate is finely ground to granularity≤200 mesh is accounted for is existed in step A
More than 80%, dry bulb granule footpath is 10～20mm.
Used as preferred embodiment, reduction intermixture includes sodium carbonate and reducing agent, sodium carbonate：The mass ratio of reducing agent
=1:4～10.The addition of sodium carbonate is in order to strengthen the reduction of iron oxides.
In this utility model, the mass component of carbon is not less than 80% in reducing agent, and reducing agent granularity is 2～5mm；Sodium carbonate
Granularity is 0.5～2.5mm.
Rotary hearth furnace is divided into oxidizing roasting area and reduction by the system and method that embodiment of the present utility model is provided, barricade
Roast area, the oxidizing roasting of material is realized with reduction roasting and integrally completed；It is more beneficial for after the oxidized roast area oxidation of material
Reduction；Reduction roasting area makes full use of the sensible heat of dry bulb group of oxidizing roasting area, and energy consumption is little, low cost；Metallized pellet hot charging enters
Enter electric furnace, reduce the energy consumption of electric furnace.
Embodiment 1
It is 82.23% by the quality accounting that certain ilmenite concentrate is milled to granularity≤200 mesh, pelletizing (pelletizing particle diameter 15mm) is dried
Enter from rotary hearth furnace feeding mouth afterwards, rotary hearth furnace oxidizing roasting area radian is 150 °, and 820 DEG C of temperature control blasts volume of fuel
12% oxygen, 1230 DEG C of reduction roasting area temperature control, furnace bottom rotates a circle the time for 2.5h, the dry bulb group after oxidizing roasting
During into reduction roasting area, intermixture (sodium carbonate is reduced：Reduction coal=1:5, wherein, the mass component of C in reduction coal：
83.23%, 2～4mm of granularity, sodium carbonate 1～2mm of granularity) enter from reduction intermixture feeding mouth, dry bulb group is paved with, it is paved with also
The dry bulb group of former intermixture is reduced into metallized pellet and discharges from rotary hearth furnace discharging opening in reduction roasting area, by the metallization
Pelletizing hot charging enters furnace melting and separates acquisition molten iron and Ti-enriched slag.
Embodiment 2
It is 84.87% by the quality accounting that certain ilmenite concentrate is milled to granularity≤200 mesh, pelletizing (pelletizing particle diameter 10mm) is dried
Enter from rotary hearth furnace feeding mouth afterwards, rotary hearth furnace oxidizing roasting area radian is 160 °, and 900 DEG C of temperature control blasts volume of fuel
10% oxygen, 1150 DEG C of reduction roasting area temperature control, furnace bottom rotates a circle the time for 4h, and the dry bulb group after oxidizing roasting enters
When entering reduction roasting area, intermixture (sodium carbonate is reduced：Reduction coal=1:6, wherein, the mass component of C in reduction coal：
81.26%, 2～3mm of granularity, sodium carbonate 0.5～1.5mm of granularity) enter from reduction intermixture feeding mouth, dry bulb group is paved with, spread
The dry bulb group for completely reducing intermixture is reduced into metallized pellet from the discharge of rotary hearth furnace discharging opening in reduction roasting area, by the gold
Category pellet hot charging enters furnace melting and separates acquisition molten iron and Ti-enriched slag.
Embodiment 3
It is 83.26% by the quality accounting that certain ilmenite concentrate is milled to granularity≤200 mesh, pelletizing (pelletizing particle diameter 16mm) is dried
Enter from rotary hearth furnace feeding mouth afterwards, rotary hearth furnace oxidizing roasting area radian is 170 °, and 950 DEG C of temperature control blasts volume of fuel
15% oxygen, 1250 DEG C of reduction roasting area temperature control, furnace bottom rotates a circle the time for 3h, and the dry bulb group after oxidizing roasting enters
When entering reduction roasting area, intermixture (sodium carbonate is reduced：Reduction coal=1:9, wherein, the mass component of C in reduction coal：
82.28%, 1～2mm of granularity, sodium carbonate 3～5mm of granularity) enter from reduction intermixture feeding mouth, dry bulb group is paved with, it is paved with also
The dry bulb group of former intermixture is reduced into metallized pellet and discharges from rotary hearth furnace discharging opening in reduction roasting area, by the metallization
Pelletizing hot charging enters furnace melting and separates acquisition molten iron and Ti-enriched slag.
It should be noted that each embodiment above by reference to described by accompanying drawing is only to illustrate this utility model rather than limit
Scope of the present utility model is made, it will be understood by those within the art that, without departing from spirit of the present utility model and model
The modification carried out to this utility model on the premise of enclosing or equivalent, all should cover within the scope of this utility model.
Additionally, unless the context outside indication, the word for occurring in the singular includes plural form, and vice versa.In addition, removing non-specifically
Explanation, then any embodiment all or part of can with reference to any other embodiment all or part of using.
Claims (5)
1. the system that a kind of rotary hearth furnace joint electric furnace processes ilmenite concentrate, including：Rotary hearth furnace and electric furnace, the rotary hearth furnace includes pan feeding
Mouth, discharging opening 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 into oxidizing roasting area and is gone back
Former roast area, the rotary hearth furnace feeding mouth is located at the oxidizing roasting area, and the rotary hearth furnace discharging opening is located at the reduction roasting
Area；
The electric furnace includes feeding mouth and discharging opening；
The rotary hearth furnace discharging opening connects the electric furnace feeding mouth.
2. system according to claim 1, it is characterised in that the system further includes atomizer mill, pelletizer, 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 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 rotary hearth furnace further includes to reduce intermixture entrance,
The reduction intermixture entrance is located at furnace roof of the reduction roasting area away from rotary hearth furnace discharge port end.
4. system according to claim 1, it is characterised in that the quantity of the barricade is two, described two barricades it
Between the radian of annular space be 150 °～180 ° and constitute the oxidizing roasting area, the furnace bottom of the barricade bottom and the rotary hearth furnace
The distance of upper surface is 10～20cm.
5. system according to claim 1, it is characterised in that the rotary hearth furnace feeding mouth and the rotary hearth furnace discharging opening it
Between sector region radian be 10 °～20 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621252992.8U CN206143275U (en) | 2016-11-22 | 2016-11-22 | System for rotary hearth furnace is united electric stove and is handled ilmenite concentrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621252992.8U CN206143275U (en) | 2016-11-22 | 2016-11-22 | System for rotary hearth furnace is united electric stove and is handled ilmenite concentrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206143275U true CN206143275U (en) | 2017-05-03 |
Family
ID=58626139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621252992.8U Expired - Fee Related CN206143275U (en) | 2016-11-22 | 2016-11-22 | System for rotary hearth furnace is united electric stove and is handled ilmenite concentrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206143275U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106399666A (en) * | 2016-11-22 | 2017-02-15 | 江苏省冶金设计院有限公司 | System and method for treating titanium concentrate by combining rotary hearth furnace and electric furnace |
-
2016
- 2016-11-22 CN CN201621252992.8U patent/CN206143275U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106399666A (en) * | 2016-11-22 | 2017-02-15 | 江苏省冶金设计院有限公司 | System and method for treating titanium concentrate by combining rotary hearth furnace and electric furnace |
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