CN207958419U - A kind of oxide mineral prereduction device based on rotary hearth heating furnace - Google Patents
A kind of oxide mineral prereduction device based on rotary hearth heating furnace Download PDFInfo
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- CN207958419U CN207958419U CN201820192667.XU CN201820192667U CN207958419U CN 207958419 U CN207958419 U CN 207958419U CN 201820192667 U CN201820192667 U CN 201820192667U CN 207958419 U CN207958419 U CN 207958419U
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- mineral
- rotary hearth
- furnace
- heating furnace
- prereduction
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Abstract
The utility model provides a kind of oxide mineral prereduction device based on rotary hearth heating furnace, the oxide mineral prereduction device is placed on rotary hearth heating furnace, communicates therewith and can rotate with it, the oxide mineral prereduction device includes the feeding mechanism and pre-reducing furnace being connected to up and down, the lower end of wherein pre-reducing furnace forms open discharge port and is placed in rotary hearth heating furnace, and the upper end of the pre-reducing furnace offers residual gas outlet.High temperature heating gas in rotary hearth heating furnace can be introduced to progress mineral prereduction in prereduction device by the utility model, improve the utilization rate of heating gas in rotary hearth heating furnace；Pre-reduction treatment early period that mineral are carried out using the utility model accelerates the reduction treatment speed of rotary hearth heating furnace, reduces the requirement sampled to raw ore, improves to cheap smalls and high-grade, low grade oxidation ore object, poor, resource of tailings utilization.
Description
Technical field
The utility model is related to metallurgical reduction technique fields, and in particular to a kind of oxide mineral based on rotary hearth heating furnace is pre-
Reduction apparatus.
Background technology
It is excessive to the mining inetesity of iron ore deposit recently as fast development China of steel industry, it makes a low multiple use
And the continuous increase of geological mapping difficulty so that the iron ore deposit that geological conditions is good, resource taste is high, sorting is good gradually subtracts
Few, sustainable supplying ability declines, and reserved resources are insufficient, and low-grade, the difficult iron ore deposit for selecting smelting will grind as technique of preparing
One of emphasis studied carefully.In the explored Iron Ore Reserve in China, it is 32% that iron ore, which is averagely sampled, and low 15 are averagely sampled than the world
Percentage point.Although iron ore total amount is big, it leads to " taste property ", " institutional " iron deficiency based on lean ore.It is expected that the year two thousand twenty, if
Ensure demand of the output of steel of planning to iron ore, 100,000,000 tons or so of ore will be lacked at that time.Therefore, low taste iron ore deposit
It is the following CHINESE INDUSTRIES and the highly important resource guarantee of strategic resource and important standby, reinforces low-grade iron ore resource comprehensive profit
With being to ensure the key foundation persistently supplied of Domestic Resources.
Many reduction production procedures cannot be accomplished adequately to show using it for the high temperature heating gas of generation at this stage：
1, furnace high-temperature heating gas subparticipation burning redundance cannot make full use of；
2, residual gas cycle caused by follow-up pyrolytic process is supplemented in stove and participates in burning and reduction, causes high in stove
It is further superfluous to warm coal gas, good can not be used, reduce the utilization rate of thermal energy.
Reducing process equipment is also by coal-iron ratio, gas iron than being limited and being limited by raw material grade, to reduction ore and type
The taste of coking coal requires stringent.
Utility model content
The utility model provides a kind of oxide mineral prereduction device based on rotary hearth heating furnace, can be low grade oxidation ore
Object is recycled by combining the heating gas that pyrolysis installation generates to heating gas in rotary hearth furnace and heat carrier, is improved to honest and clean
The utilization of valence smalls and high-grade, low grade oxidation ore object, lean ore, resource of tailings.
In order to solve the above technical problems, the utility model adopts the following technical solution：
A kind of oxide mineral prereduction device based on rotary hearth heating furnace, the oxide mineral prereduction device, which is placed in, turns bottom
It on heating furnace, communicates therewith and can rotate with it, the oxide mineral prereduction device includes the feeding mechanism being connected to up and down
And pre-reducing furnace, the lower end of wherein pre-reducing furnace form open discharge port and are placed in rotary hearth heating furnace, the pre-reducing furnace
Upper end offers residual gas outlet.
Further, the discharge port of the pre-reducing furnace with rotary hearth heating furnace furnace bottom there is gap, discharge port direction to turn bottom
One side clearance of heating furnace direction of rotation is less than another side clearance backwards to rotary hearth heating furnace direction of rotation.
Further, raw mineral materials protection mechanism is communicated between the feeding mechanism and pre-reducing furnace comprising mineral
Exhaust gas protecting bin and the cycle gas import for being opened in the mineral exhaust gas protecting bin upper end.
Preferably, between the feeding mechanism and mineral exhaust gas protecting bin and mineral exhaust gas protecting bin and pre-reducing furnace
It is both provided with lock material device.
Preferably, the feeding mechanism uses multiple feed hoppers arranged side by side.
Preferably, it is provided with heating gas ingress pipe on the rotary hearth heating furnace.
By above technical scheme it is found that the utility model has the advantages that：
1, high temperature heating gas in rotary hearth heating furnace can be introduced in prereduction device by the utility model and carries out mine
Object prereduction improves the utilization rate of heating gas in rotary hearth heating furnace；
2, pre-reduction treatment early period that mineral are carried out using the utility model accelerates the reduction treatment speed of rotary hearth heating furnace
Degree reduces the requirement sampled to raw ore, improves to cheap smalls and high-grade, low grade oxidation ore object, poor, resource of tailings to open
Hair utilizes.
Description of the drawings
Fig. 1 is that the utility model uses the integral layout schematic diagram in rotary hearth heating furnace system；
Fig. 2 is A-A sectional views in Fig. 1, shows the internal structure of oxide mineral prereduction device.
Fig. 3 is B-B sectional views in Fig. 1, shows the internal structure of oxide mineral prereduction device.
Specific implementation mode
A kind of preferred embodiment of the utility model is described in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, the rotary hearth heating furnace 10 is the main furnace structure for being restored to material, it is divided into straight
Flame heating zone 11 and radiant tube heating zone 12, wherein updraft Heating Zone Temperature are 550 degree, and the temperature of radiant tube heating zone is
1100 degree, which can be with rotation so that the material in stove can be cut between updraft heating zone and radiant tube heating zone
It changes, the coal gas of high temperature generated in rotary hearth heating furnace stove can enter oxide mineral prereduction device 20, be carried out to ore, Iron concentrate
Pre-add heat-treats.
In production technology, the formed coke that formed coke drying guipure machine 30 is sent into tiles to rotary hearth heating furnace furnace bottom, as turning bottom
The first via raw material 14 of heating furnace, and rotation is to the discharging portion at oxide mineral prereduction device behind updraft heating zone, in advance
Reduction mineral are layered on the top of formed coke again, as the second road raw material 15 of rotary hearth heating furnace, continue through radiant heating area after
Continuous high temperature reduction, the finished product thermal material after prereduction are entered further hot in subsequent pyrolysis installation 50 by hot discharge device 40
Solution processing.
The oxide mineral prereduction device 20 is placed on rotary hearth heating furnace, communicates therewith and can rotate with it, such as Fig. 2
Shown in 3, the oxide mineral prereduction device 20 includes feeding mechanism 21,22 and of raw mineral materials protection mechanism being connected to up and down
Pre-reducing furnace 23, the lower end of wherein pre-reducing furnace form open discharge port 24 and are placed in rotary hearth heating furnace.It will turn for convenience
Heating gas in hearth furnace introduces in pre-reducing furnace and carries out reduction reaction to mineral, the discharge port of the pre-reducing furnace and turns bottom
Bottom of Heating Furnace has gap, and a side clearance 241 of discharge port towards rotary hearth heating furnace direction of rotation is less than turns bottom heating backwards
Another side clearance 242 of stove direction of rotation.
The height of the discharge port towards a side clearance 241 of rotary hearth heating furnace direction of rotation is equal to the of rotary hearth heating furnace
The sum of raw material and the second road raw thickness all the way, another side clearance 242 of the discharge port backwards to rotary hearth heating furnace direction of rotation
Height it is suitable with the inside wall height of rotary hearth heating furnace, formed coke can be allowed in rotary hearth heating furnace by a large amount of of high temperature carbonization release
Pyrolysis gas rapidly enters pre-reducing furnace, penetrates ore, Iron concentrate layer makes it restore at high temperature, and lead-in portion circulating gas
Ensure enough reducing gas by radiant heating, the coal gas of high temperature which generates from pyrolysis installation, and lead to
The heating gas ingress pipe 13 being arranged on rotary hearth heating furnace is crossed to enter.
The upper end of the pre-reducing furnace 23 offers residual gas outlet 231, what oxide mineral prereduction device generated
Residual gas is discharged by the residual gas outlet in subsequent purifier, after then being advertised by residual gas wind turbine again
Into rotary hearth heating furnace and participate in reduction reaction.
The raw mineral materials protection mechanism 22 uses mineral exhaust gas protecting bin, and setting follows in mineral exhaust gas protecting bin upper end
Ring exhaust gas inlet 221 is anti-oxidation in order to carry out positive pressure to oxide mineral prereduction device by the positive pressure characteristic of cycle gas
Protection prevents residual gas in pre-reducing furnace from flowing into feeding mechanism, is had an impact to charging.
Quantitative control is carried out for convenience, and the first lock material dress is provided between the feeding mechanism and mineral exhaust gas protecting bin
25 are set, the second lock material device 26 is provided between mineral exhaust gas protecting bin and pre-reducing furnace, wherein the second lock material device is quantitatively adjusted
Oxide mineral is saved, the temperature of oxide mineral reduction apparatus reduction is controlled and reserved certain space is surplus to being come out through pre-reducing furnace
Remaining coal gas is gathered, recycling after then being handled by residual gas outlet submitting.
The feeding mechanism 21 uses three feed hoppers arranged side by side, corresponding, the discharging of mineral exhaust gas protecting bin 22
Mouth is also provided with three.
The utility model main reducing gas that heating gas is restored as oxide mineral in the stove that formed coke carbonization generates, pyrolysis
The pyrolysis coal gas of generation is time reducing gas, and the charcoal in heat type coke and hot semicoke particle is solid reductant, remains enough
Reducing agent, remain superfluous reducing atmosphere, to improve reduction efficiency, prereduction twice is reduced to tcrude ore product
The limitation that taste requires, improves cheap smalls and high-grade, low grade oxidation ore object, poor, resource of tailings utilization.
The operation principle of the utility model oxide mineral prereduction device：
Mineral to be oxidized enter through feeding mechanism 21, and expect that 25 dosing of device enters mineral exhaust gas and protects by the first lock
It protects in storehouse 22, is simultaneously from the cycle gas in technique and also enters in mineral exhaust gas protecting bin by cycle gas import 221, lead to
It is locked to oxide mineral to cross positive pressure；The mineral of mineral exhaust gas protecting bin expect that device 26 quantitatively enters pre-reducing furnace 23 through the second lock
It is interior, and quantify control pre-reduction temperature, yield and reduction effect.
The furnace body surrounding refractory brick thermal resistance of pre-reducing furnace 23,24 open design of discharge port at right low left high, open by the left side
Mouth enters pre-reducing furnace convenient for heating gas rapid, high volume in stove greatly and carries out abundant prereduction；Right side opening is small pre- convenient for control tiling
Restore the thickness and treating capacity of mineral.The residual gas generated when oxide mineral prereduction is sent by residual gas outlet 231
Rotary hearth heating furnace is returned again to after to subsequent processing processing to recycle.The heat looped back from subsequent pyrolysis installation simultaneously is surplus
Remaining coal gas enters rotary hearth heating furnace by heating gas ingress pipe 13 and supplements coal gas, participates in burning and reduction.
Embodiment described above is only that preferred embodiments of the present invention are described, not to this practicality
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various modifications and improvement that the technical solution of utility model is made should all fall into the guarantor that claims of the utility model determine
It protects in range.
Claims (6)
1. a kind of oxide mineral prereduction device based on rotary hearth heating furnace, which is characterized in that the oxide mineral prereduction dress
It is placed on rotary hearth heating furnace, communicates therewith and can rotate with it, the oxide mineral prereduction device includes connection up and down
Feeding mechanism and pre-reducing furnace, the lower end of wherein pre-reducing furnace forms open discharge port and is placed in rotary hearth heating furnace, should
The upper end of pre-reducing furnace offers residual gas outlet.
2. oxide mineral prereduction device according to claim 1, which is characterized in that the discharge port of the pre-reducing furnace with
Rotary hearth heating furnace furnace bottom has gap, and a side clearance of discharge port towards rotary hearth heating furnace direction of rotation is less than turns bottom heating backwards
Another side clearance of stove direction of rotation.
3. oxide mineral prereduction device according to claim 1, which is characterized in that the feeding mechanism and pre-reducing furnace
Between be communicated with raw mineral materials protection mechanism comprising mineral exhaust gas protecting bin and be opened in the mineral exhaust gas protecting bin upper end
Cycle gas import.
4. oxide mineral prereduction device according to claim 3, which is characterized in that the feeding mechanism and mineral exhaust gas
Lock material device is both provided between protecting bin and mineral exhaust gas protecting bin and pre-reducing furnace.
5. according to claim 1-4 any one of them oxide mineral prereduction devices, which is characterized in that the feeding mechanism is adopted
With multiple feed hoppers arranged side by side.
6. according to claim 1-4 any one of them oxide mineral prereduction devices, which is characterized in that the rotary hearth heating furnace
On be provided with heating gas ingress pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820192667.XU CN207958419U (en) | 2018-01-31 | 2018-01-31 | A kind of oxide mineral prereduction device based on rotary hearth heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820192667.XU CN207958419U (en) | 2018-01-31 | 2018-01-31 | A kind of oxide mineral prereduction device based on rotary hearth heating furnace |
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| CN207958419U true CN207958419U (en) | 2018-10-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103259A (en) * | 2018-01-31 | 2018-06-01 | 新疆乾海环保科技有限公司 | A kind of oxide mineral prereduction device based on rotary hearth heating furnace |
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2018
- 2018-01-31 CN CN201820192667.XU patent/CN207958419U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103259A (en) * | 2018-01-31 | 2018-06-01 | 新疆乾海环保科技有限公司 | A kind of oxide mineral prereduction device based on rotary hearth heating furnace |
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