CN107227392A - Miberal powder also original system - Google Patents
Miberal powder also original system Download PDFInfo
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- CN107227392A CN107227392A CN201710614425.5A CN201710614425A CN107227392A CN 107227392 A CN107227392 A CN 107227392A CN 201710614425 A CN201710614425 A CN 201710614425A CN 107227392 A CN107227392 A CN 107227392A
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- Prior art keywords
- miberal powder
- reduction
- reduction reaction
- preheating
- chamber
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0073—Selection or treatment of the reducing gases
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/04—Making spongy iron or liquid steel, by direct processes in retorts
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention discloses a kind of miberal powder also original system, including：Reduction reaction device；Preheating device, preheating chamber is limited in preheating device, second charging aperture is additionally provided with the side wall of preheating device, air inlet is additionally provided with the bottom of second charging aperture, air inlet is connected with reduction offgas outlet, in preheating chamber, opening up air devider is additionally provided with air inlet, the second discharging opening is additionally provided with the top of second charging aperture, the bottom of preheating chamber is additionally provided with the 3rd discharging opening, under drop down onto the miberal powder of preheating chamber bottom and discharge preheating chamber through the 3rd discharging opening；Gas-solid separating device, gas-solid separating device is connected with the second discharging opening, and the solid outlet of gas-solid separating device is connected with first charging aperture.The miberal powder also original system of the present invention, shape preheating can be entered to miberal powder, operating efficiency is improved, the energy consumption and operating cost of system is reduced, while simple to operate, running is easily controllable in advance.
Description
Technical field
The present invention relates to metallurgical technology field, more particularly to a kind of miberal powder also original system.
Background technology
Direct reduction processes of Iron ores is the cutting edge technology of development of iron ＆ steel industry, is that development of iron ＆ steel industry breaks away from coking coal resource
Yoke, reduction energy consumption, reduction CO2 discharges, the important development direction for improving steel products structure, improving steel products quality.Directly
The substitute that reduced iron is high-quality steel scrap is connect, is source of iron raw material that can not be short and the pneumatic steelmaking for producing high-quality clean steel
High-quality cooling agent.
Commercial production levels are reached now or are still broadly divided into two classes in the direct reduction process for continuing to test：Use gas
The direct-reduction process of reducing agent and the direct-reduction process using solid reductant.Wherein, using the direct-reduction of gaseous reducing agent
Method is divided by process equipment and can be divided into three classes, and is shaft furnace process, retort process making sponge iron and fluidized bed process respectively.
Shaft furnace process refers to furnace charge and coal gas reverse movement in stove, and the furnace charge of decline is progressively by heated by gas and the side of reduction
Method.The method, using Midrex methods as representative, is most fast, the most widely used direct reduction iron making of current development.It is used as the oxygen of raw material
Pellet ore deposit is added after shaft furnace from furnace roof, sequentially passes through preheating, reduction and cooling three phases.Sponge iron obtained by reduction, it is cold
But to discharging out of the furnace after 50 DEG C, to prevent reoxidizing.Reducing gas is manufactured with a part of coal gas of natural gas and shaft furnace in itself, heating
To 760~900 DEG C, it is passed through in reduction shaft furnace pars infrasegmentalis.Stock gas reclaim after be respectively used to coal gas regeneration, conversion stove heat and
Shaft furnace is cooled down.The heat and mass efficiency high of this method, product energy consumption per ton can be low up to 2.56 × 106 kilocalories, good product quality, metal
Rate is up to 92%.
The HyL methods of Mexico are unique industrialization retort processes making sponge iron.Furnace charge is fixed in retort, is passed through thermal reduction
Coal gas is preheated, reduced and cooled down successively, is finally periodically stopped the supple of gas or steam, outside furnace charge drain tank.In order to overcome fixed bed reduction coal
Gas utilizes bad shortcoming, and HyL methods employ 4 retort serial operations, and reducing gas is manufactured with natural gas, first in heat exchange type
Insufficient conversion in reburner.Be dehydrated after the reaction of each retort, secondary conversion and temperature raising, coal gas is 1100
Reduced at a high temperature of DEG C.In the case where stopping ventilation, HyL methods force discharge using discharge bar, therefore are not afraid of charging binding, operate
Temperature is higher, although HYL methods are interruption operation, but productivity ratio is not low.Have the disadvantage that coal gas is utilized poor, heat consumption is big, product matter
Amount is uneven.
Fluidized bed process is the method that gas reduction Iron Ore Powder is used in fluid bed.In fluidized bed process reduction, coal gas is except use
Make outside reducing agent and heat carrier, also serve as the fluidizing agent of bulk cargo layer.Air flow press molding that the smitham bed of material is through and according to
It is secondary to be heated, reduce and cool down.Briquetting after product cooling is reduced to preserve.Fluidized reduction has directly saves agglomeration using miberal powder
Advantage, and because ore grain size is small and can Accelerating reduction.Have the disadvantage that particulate miberal powder is very easily bonded, typically at 600~700 DEG C not
Operated at high temperature, not only rate of reduction is little, and easily facilitates CO analysis carbon to react, carbon precipitating is excessive, then hinders
Normal operating.
Prior art provides a kind of method and device of gas-based reduction shaft furnace production DRI, and the technology uses coal
System also Primordial Qi and coke-stove gas combine supply shaft furnace production DRI.The technique can only handle lump material, it is impossible to directly
Handle powdery iron ore.Agglomeration is needed during processing powdery iron ore, the tedious process and power consumption water consumption are less economical.
Prior art additionally provides a kind of system and method for fluid bed reduction powdery iron ore, and the invention passes through high gas velocity
Operation accelerates reduction of iron ore speed and greatly improves the gas processing capability of unit section fluid bed simultaneously, passes through reducing gas
Parallel connection reduction operates the utilization rate for improving coal gas by reducing gas series-multiple connection by the tolerance of single-stage fluidized bed, realizes near
Efficient reduction of the powdery iron ore in fluid bed under normal pressure.The technological process is too complicated, for single fluidised bed, it is necessary to
Gas flow rate is adjusted to control the fluidization situation and course of reaction of iron ore powder in bed.Meanwhile, adjust the difficulty of gas flow rate
It is larger.And for flow process of the iron ore powder in bed, once gas velocity is not adjusted in the reasonable scope, easily occur
" bonding defluidization " phenomenon, and then cause production to be stopped work.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art.Therefore, the present invention proposes a kind of ore deposit
Powder also original system, shape preheating can be entered to miberal powder, operating efficiency is improved, the energy consumption and operating cost of system is reduced, grasped simultaneously in advance
Make simple, running is easily controllable.
Miberal powder according to embodiments of the present invention also original system, including：Limited in reduction reaction device, the reduction reaction device
Reduction reaction chamber is made, the reduction reaction device is sequentially provided with and the reduction reaction chamber on top-down direction
The first charging aperture that connects and be spaced, also reduction offgas outlet, Primordial Qi import and the first discharging opening, in the reduction tail gas
It is provided with heating component to provide thermal source for the reduction reaction in the reduction reaction chamber between outlet and the also Primordial Qi import；
Limited in preheating device, the preheating device and be additionally provided with second charging aperture on preheating chamber, the side wall of the preheating device, institute
State miberal powder to enter in the preheating chamber by the second charging aperture, air inlet is additionally provided with the bottom of the second charging aperture
Mouthful, the air inlet with it is described reduction offgas outlet be connected with limit gas passage with will in the reduction reaction chamber and also
Protocercal tail conductance enters in the preheating chamber, to be preheated to the miberal powder in the preheating chamber, in the preheating chamber
It is interior, opening up air devider is additionally provided with the air inlet, the second discharging opening is additionally provided with the top of the second charging aperture,
The miberal powder discharges the preheating chamber, the preheating chamber under the drive of the reduction tail gas by second discharging opening
Bottom be additionally provided with the 3rd discharging opening, under drop down onto the miberal powder of the preheating chamber bottom and discharge institute through the 3rd discharging opening
State preheating chamber；Gas-solid separating device, the gas-solid separating device is connected with second discharging opening, the gas-solid separating device
Solid outlet be connected with the first charging aperture.
Miberal powder according to embodiments of the present invention also original system, by setting preheating device, so as to improve the profit of heat
With rate, the equilibrium degree of reduction is lifted, increases miberal powder treating capacity, and then improves the operating efficiency of miberal powder also original system, miberal powder is reduced
The also energy consumption and operating cost of original system, while simple to operate, running is easily controllable.
According to some embodiments of the present invention, air blower is provided with the gas passage.
According to some embodiments of the present invention, on top-down direction, the cross section of the air devider gradually increases.
Specifically, striker plate, circumferential direction of the striker plate along the preheating chamber are additionally provided with the preheating chamber
Extension, the two ends of the striker plate are connected and the striker plate and the bottom wall with the bottom wall and side wall of the preheating chamber respectively
Between have certain angle.
Specifically, the heating component for it is multiple in the horizontal direction or the spaced setting of vertical direction heat accumulating type radiation
Pipe, the two ends of the heat accumulation type radiant tube are respectively equipped with burner, two burner alternating ignition.
According to some embodiments of the present invention, the reduction reaction device also includes water-cooling wall, and the water-cooling wall is located at institute
State also between Primordial Qi import and first discharging opening, the water-cooling wall is located on the periphery wall of the reduction reaction chamber.
Specifically, the reduction reaction device also includes conveying worm, and conveying worm is located at the first discharge outlet.
Alternatively, the first charging aperture is located on the roof of the reduction reaction chamber, is set at the first charging aperture
There is feed hopper, the cross section of the feed hopper is gradually reduced that material envelope can be formed in charging on top-down direction.
According to some embodiments of the present invention, the reduction reaction device also includes multiple push-pull valves, the multiple plate
Valve is located between the first charging aperture and the reduction offgas outlet, on top-down direction between the multiple push-pull valve
The two neighboring push-pull valve is alternately opened and closed when setting, charging.
Further, the reduction reaction device also includes：It is arranged on the cone of the material leakage below the multiple push-pull valve and shakes
Dynamic Cloth sieve.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the schematic diagram of miberal powder according to embodiments of the present invention also original system；
Fig. 2 is the schematic diagram of preheating device according to embodiments of the present invention.
Reference：
Miberal powder also original system 100；
Reduction reaction device 1；Reduction reaction chamber a；First charging aperture 11；Feed hopper 111；Reduce offgas outlet 12；Also
Primordial Qi import 13；Air distribution plate 131；Discharging opening 14；Conveying worm 141；Heating component 15；Heat accumulation type radiant tube 151；Water-cooling wall
16；Fluid intake 161；Fluid issuing 162；First push-pull valve 171；Second push-pull valve 172；Material leakage cone 18；Vibrating Distribution Screen 19；
Fuel gas inlet 20；Exhanst gas outlet 21；
Preheating device 3；Preheating chamber b；Second charging aperture 31；Air inlet 32；Air devider 321；Gas passage c；Air blower
33；Second discharging opening 34；3rd discharging opening 35；Striker plate 36；
Gas-solid separating device 4；Solid outlet 41；Gas vent 42；
Raw material cabin 5.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " on ", " under ", " vertical ", " level ", " top ", " bottom ",
The orientation or position relationship of the instruction such as " interior ", " outer ", " circumference " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, defining " first ", " second "
Feature can express or implicitly include one or more this feature.In the description of the invention, unless otherwise saying
Bright, " multiple " are meant that two or more.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Miberal powder according to embodiments of the present invention also original system 100 is described below with reference to Fig. 1-Fig. 2.
As Figure 1-Figure 2, miberal powder according to embodiments of the present invention also original system 100, including：It is reduction reaction device 1, pre-
Thermal 3 and gas-solid separating device 4.
Specifically, reduction reaction chamber a is limited in reduction reaction device 1, reduction reaction device 1 is top-down
The first charging aperture 11 for connecting and being spaced with reduction reaction chamber a, reduction offgas outlet 12, reduction are sequentially provided with direction
The discharging opening 14 of gas import 13 and first, thinks also between reduction offgas outlet 12 and also Primordial Qi import 13 provided with heating component 15
Reduction reaction in former reaction chamber a provides thermal source.
It follows that miberal powder enters reduction reaction chamber a by first charging aperture 11, in the presence of the self gravitation under
Fall.Reducing gas is entered reduction reaction chamber a and risen by also Primordial Qi import 13, and miberal powder comes into contact with reducing gas.
When miberal powder and reducing gas are under the conditions of the heat supply of heating component 15, temperature is increased to after reaction temperature in reduction reaction chamber a
Interior generation reduction reaction.After the completion of reaction, the solid product of generation discharges reduction reaction chamber a by the first discharging opening 14, high
The reduction tail gas of temperature discharges reduction reaction chamber a by reducing offgas outlet 12.
It is understood that because reduction offgas outlet 12 is located between first charging aperture 11 and heating component 15, so that
The reduction tail gas formed after reaction can be with being drained into reduction anti-when being flowed in reduction reaction chamber a towards reduction offgas outlet 12
Not contacted with the miberal powder that reducing gas reacts also in chamber a is answered, so that the reduction tail gas of high temperature is exchanged heat with miberal powder,
The preheating of miberal powder can be achieved, the heating-up time before miberal powder reaction is advantageously reduced.Enter because the first discharging opening 14 is located at also Primordial Qi
The lower section of mouth 13, therefore the solid product of reduction reaction generation can be with continuing to be passed into reduction reaction chamber a in dropping process
Interior reducing gas is contacted and exchanged heat, so that solid product temperature is reduced, raises the reducing gas temperature of rising, can be achieved
The preheating of reducing gas and the cooling of solid product, advantageously reduce the heating-up time before reducing gas reaction, it is ensured that solid is produced
The stability of thing.Thus, it is possible to improve the reduction reaction efficiency in reduction reaction chamber a, i.e., ore deposit can be improved to a certain extent
The operating efficiency of powder also original system 100.The utilization rate of heat can be improved simultaneously, reduce energy consumption.
It is smaller additionally, due to the particle diameter of miberal powder, heat transfer condition and kinetics between gas-solid are made using direct-fired mode
Condition is substantially improved, and reduction reaction can just be completed within the several seconds.This mode that directly heats is compared to first heating reducing gas
Reduction reaction chamber a mode is passed through again, reduction reaction rate is very fast, the utilization rate of heat is high and security is preferable.
Meanwhile, compared with prior art, the miberal powder also original system 100 of the embodiment of the present invention directly can be gone back to miberal powder
Original, so as to so that reduction reaction carry out more thoroughly, reduction equilibrium degree is improved, while being also avoided that making for tedious process
Block flow.
Limited in preheating device 3 and second charging aperture 31 is additionally provided with preheating chamber b, the side wall of preheating device 3, miberal powder leads to
Cross second charging aperture 31 to enter in preheating chamber b, be additionally provided with air inlet 32 in the bottom of second charging aperture 31, air inlet 32 with
Reduction offgas outlet 12 is connected to limit gas passage c the reduction tail gas in reduction reaction device 1 importing preheating chamber b
It is interior, to be preheated to the miberal powder in preheating chamber b, in preheating chamber b, opening up point wind is additionally provided with air inlet 32
Device 321, the second discharging opening 34 is additionally provided with the top of second charging aperture 31, and miberal powder goes out under the drive of reduction tail gas by second
Material mouth 34 discharges preheating chamber b, and preheating chamber b bottom is additionally provided with the 3rd discharging opening 35, under drop down onto the ore deposits of preheating chamber b bottoms
Powder discharges preheating chamber b through the 3rd discharging opening 35.
Miberal powder after preheating enters reduction reaction chamber a after the discharge of the second discharging opening 34 through first charging aperture 11, so that
The energy consumption that reduction reduction is carried out.It follows that reduction tail gas enters preheating chamber b along gas passage c by air inlet 32
It is interior, being then drained into preheating chamber b and rising by point wind even action of air devider 321.Miberal powder passes through the second charging
Mouth 31 is entered in preheating chamber b, is fallen in the presence of self gravitation.Due to entering going back for the high temperature in preheating chamber b
Protocercal tail gas has certain upward blowing force, while air inlet 32 is located at the lower section of second charging aperture 31, so that in preheating chamber b
Miberal powder and reduction tail gas can contact with each other and exchange heat, while in the presence of the blowing force of reduction tail gas, miberal powder is reduced tail gas band
It is dynamic to rise, so as to discharge the second discharging opening 34.And the larger miberal powder of particle is larger due to self gravitation, it is impossible to be reduced tail gas band
It is dynamic to rise, but overcome the blowing force of reduction tail gas and continue to fall, finally from the 3rd discharging opening 35 discharge preheating chamber b.So as to
Understand, preheating device 3 can be preheated to miberal powder, while also having the effect of certain screening miberal powder, and then improve miberal powder
The also operating efficiency of original system 100.
Gas-solid separating device 4 is connected with the second discharging opening 34, the solid outlet 41 and first charging aperture of gas-solid separating device 4
11 are connected.It follows that the miberal powder and reduction tail gas discharged from the second discharging opening 34 carry out gas-solid point by gas-solid separating device 4
From the miberal powder isolated is entered anti-reduce in reduction reaction chamber a by solid outlet 41 and first charging aperture 11
Should.
In summary, preheating device 3 can be preheated and screened to entering the miberal powder in reduction reaction chamber a, be carried
The temperature for the miberal powder that height is entered in reduction reaction chamber a, controls the granularity of miberal powder entered in reduction reaction chamber a, makes
Powder particle size in reduction reaction chamber a is uniform, reduces the miberal powder heating-up time.It is small additionally, due to powder particle size, with reducing gas
Contact area is big, and the chemical reaction rate between the two is accelerated, and can increase miberal powder treating capacity.And then reduction reaction chamber a can be improved
Interior reduction reaction rate, lifts the equilibrium degree of reduction, so as to improve the operating efficiency of miberal powder also original system 100.Preheating device 3
Interior thermal source comes from the reduction tail gas in reduction reaction device 1, and then can reduce the energy consumption and fortune of miberal powder also original system 100
Row cost.Compared with prior art, the miberal powder of the embodiment of the present invention also original system 100 need to be controlled in reduction reaction device 1
Temperature, simple to operate, running is easily controllable.
Miberal powder according to embodiments of the present invention also original system 100, by setting preheating device 3, so as to improve heat
Utilization rate, lift the equilibrium degree of reduction, increase miberal powder treating capacity, and then improve the operating efficiency of miberal powder also original system 100, drop
The energy consumption and operating cost of low miberal powder also original system 100, while simple to operate, running is easily controllable.
Specifically, it is additionally provided with gas vent 42 on gas-solid separating device 4.So that the reduction tail gas isolated passes through gas
Gas-solid separating device 4 is discharged in outlet 42, and then improves the reliability of gas-solid separating device 4.
According to some embodiments of the present invention, air blower 33 is provided with gas passage c.It is thus possible to by controlling air blast
The slewing rate of machine 33 reduces the speed and flow of tail gas to control to enter in preheating chamber b, and then controls reduction tail gas
The granularity of preheating temperature and screening miberal powder to miberal powder.
According to some embodiments of the present invention, on top-down direction, the cross section of air devider 321 gradually increases.
Air devider 321 is blocked so as to avoid the miberal powder fallen to be deposited on air devider 321 to a certain extent, while under being easy to
The miberal powder discharge preheating device 3 fallen, is conducive to improving the reliability of preheating device 3.
Alternatively, the second discharging opening 34 is located at preheating chamber b top.Consequently facilitating the miberal powder and reduction tail gas that filter out
Discharge, it is ensured that miberal powder and reduction tail gas discharge amount.
Specifically, striker plate 36, circumferential direction extension of the striker plate 36 along preheating chamber b, gear are additionally provided with preheating chamber b
The two ends of flitch 36 are connected with preheating chamber b bottom wall and side wall and have certain folder between striker plate 36 and bottom wall respectively
Angle.It is deposited on preheating chamber b corner so as to be effectively prevented from the miberal powder fallen and preheating chamber b can not be discharged, favorably
In the reliability for improving preheating device 3.
Further, striker plate 36 can have multiple, multiple striker plates 36 in preheating chamber b circumferential direction equably
It is arranged at intervals.It can thus be appreciated that striker plate 36 is simple in construction, preheating device 3 is easily manufactured.
Specifically, heating component 15 for it is multiple in the horizontal direction or the spaced setting of vertical direction heat accumulation type radiant tube
151, the two ends of heat accumulation type radiant tube 151 are respectively equipped with burner (not shown), and two burners replace ignition.Thus
Understand, the heat supply of heating component 15 is stable, temperature is easy to control.The fire that the burner combustion of the one end of heat accumulation type radiant tube 151 is produced
Flame forms thermograde when spraying, i.e., gradually reduced from the outside temperature of burner.And the fire that other end burner combustion is produced
Flame also forms thermograde when spraying.When the burner at two ends alternately burns, two thermogrades formed are folded
Plus so that the whole bulk temperature of heat accumulation type radiant tube 151 is uniform.Thus, miberal powder can realize uniform heating, improve reduction
The uniformity of reaction.
It is understood that heating component 15 can be formed as multiple heat accumulation type radiant tubes spaced in the horizontal direction
151, it can also be formed as multiple in the spaced heat accumulation type radiant tube 151 of vertical direction.So as to by controlling multiple storages
The number of hot type radiant tube 151, the number of plies and spacing each other control the bulk temperature of heating component 15, naturally it is also possible to
By controlling the temperature of each heat accumulation type radiant tube 151 to control the bulk temperature of heating component 15.
It is multiple heat accumulation type radiant tubes 151 additionally, due to heating component 15.It is hereby understood that being additionally provided with reduction reaction device
Fuel gas inlet 20 and exhanst gas outlet 21, and then the combustion stability of burner can be ensured, make the heat supply of heating component 15 stable.
Specifically, in reduction reaction chamber a, also it is provided with opening up air distribution plate 131 at Primordial Qi import 13.So that
The reducing gas entered in reduction reaction chamber a can be evenly distributed in reduction reaction chamber a and equably rise, and enter
And be conducive to improving the speed of the reduction reaction in reduction reaction chamber a, improve the operating efficiency of miberal powder also original system 100.
According to some embodiments of the present invention, reduction reaction device 1 also includes water-cooling wall 16, and water-cooling wall 16 is located at also Primordial Qi
Between the discharging opening 14 of import 13 and first, water-cooling wall 16 is located on reduction reaction chamber a periphery wall.
Specifically, water-cooling wall 16 is distributed in the bottom of reduction reaction chamber a periphery wall, water or steaming of the inside for flowing
Vapour, it is the heat for absorbing reduction reaction chamber a internal solid products that it, which is acted on, realizes the reducing temperature twice of solid product.It is hereby understood that
The solid product of reduction reaction generation by periphery wall with after reducing gas heat exchange cooling, water cooling can be provided with when continuing to fall
The reduction reaction chamber a of wall 16 region, so as to further cool down solid product, makes the temperature of solid product be down to often
Temperature, further improves the stability of solid product.Finally, the solid product after cooling is anti-through the discharge reduction of the first discharging opening 14
Answer chamber a.
Specifically, water-cooling wall 16 includes fluid intake 161 and fluid issuing 162.It follows that water or water vapour pass through
Fluid intake 161 enters inside water-cooling wall 16, then flows out water-cooling wall 16 from fluid issuing 162, and then realize water-cooling wall 16
Cool function.
Specifically, the reduction reaction device 1 also includes conveying worm 141, and conveying worm 141 is located at the first discharging
At mouth 14.So as to which the solid product at the first discharging opening 14 in reduction reaction chamber a is delivered into reduction reaction chamber a's
Outside, avoids solid product from being accumulated in the first discharging opening 14 and block the first discharging opening 14 to a certain extent.
Alternatively, the first discharging opening 14 is located on reduction reaction chamber a bottom wall.Consequently facilitating the discharge of solid product,
Improve the reliability of miberal powder also original system 100.
Alternatively, first charging aperture 11 is located on reduction reaction chamber a roof, and feed hopper is provided with first charging aperture 11
111, the cross section of feed hopper 111 is gradually reduced that material envelope can be formed in charging on top-down direction.Thus, it is possible to
Prevent outside air from entering in reduction reaction chamber a and influenceing reduction reaction, ensure reduction reaction chamber a's while also helping
Sealing, and then improve the operating efficiency of miberal powder also original system 100.
According to some embodiments of the present invention, reduction reaction device 1 also includes multiple push-pull valves, and multiple push-pull valves are located at the
Between one charging aperture 11 and reduction offgas outlet 12, multiple push-pull valves are arranged at intervals on top-down direction, feed phase
Adjacent two push-pull valves are alternately opened and closed.So as to advantageously ensure that reduction reaction chamber a sealing.
Specifically, push-pull valve is two, and the push-pull valve of top is the first push-pull valve 171, and the push-pull valve of lower section is inserted for second
Plate valve 172.
It is understood that miberal powder falls in feed hopper 111, fall first on the first push-pull valve 171, now open first
Push-pull valve 171, closes the second push-pull valve 172.So that miberal powder is fallen on the second push-pull valve 172 from the first push-pull valve 171, work as miberal powder
When entirely falling within the second push-pull valve 172, the first push-pull valve 171 is first closed, then open the second push-pull valve 172 so that miberal powder enters
In reduction reaction chamber a.It can be seen from above-mentioned analysis process during charging two neighboring push-pull valve 17 replace opening and closing can be real
Miberal powder is in air-tight state all the time in existing fill process, realizes material envelope, reduction reaction chamber a sealing is improved, one
Determine to avoid heat losses in degree, and then improve the operating efficiency of miberal powder also original system 100.
Further, reduction reaction device 1 also includes：It is arranged on material leakage cone 18 and vibration cloth below multiple push-pull valves
Sieve 19.Thus, when miberal powder falls under gravity, arrangement material leakage cone 18 is avoided that miberal powder is assembled, it is ensured that what miberal powder fell
Smoothness, while under the effect of vibration of Vibrating Distribution Screen 19, miberal powder falls in which can be more uniformly distributed, and then improves the equal of reduction
Weighing apparatus degree.
Alternatively, miberal powder also original system 100 also includes raw material cabin 5, and raw material cabin 5 is connected with second charging aperture 31.So as to
By in the miberal powder input preheating chamber b in raw material cabin 5.
The restoring method of miberal powder according to embodiments of the present invention also original system 100, miberal powder also original system is according to the present invention
The miberal powder of above-described embodiment also original system 100, restoring method comprises the following steps：
S1：Reduction tail gas is passed through into reduction reaction chamber a by also Primordial Qi import 13, control heating component 15 work with
Heat is provided for reduction reaction chamber a.
S2：Miberal powder is put into preheating device 3 by second charging aperture 31, by the reduction tail gas in reduction reaction chamber a
Import in preheating chamber b, control air devider 321 works uniformly to be risen with to preheating cavity so as to reduce tail gas in preheating chamber b
Miberal powder in the b of room is preheated.
S3：Control gas-solid separating device 4 works to enter promoting the circulation of qi to the miberal powder discharged from the second discharging opening 34 and reduction tail gas
Gu separation, the miberal powder isolated is entered in reduction reaction chamber a by solid outlet 41 and first charging aperture 11, reduction reaction
The solid product generated afterwards discharges reduction reaction chamber a by the first discharging opening 14.
The restoring method of miberal powder according to embodiments of the present invention also original system 100, it is possible to increase the utilization rate of heat, lifting
The equilibrium degree that miberal powder also original system 100 is reduced, increases miberal powder treating capacity, and then the operating efficiency of raising miberal powder also original system 100,
The energy consumption and operating cost of miberal powder also original system 100 are reduced, while miberal powder also original system 100 is simple to operate, running is easy
In control.
It is detailed to being carried out according to the miberal powder also structure of original system 100 of a specific embodiment of the invention below with reference to Fig. 1-Fig. 2
Describe in detail bright.It should be understood that, following explanation only has exemplary, and those of ordinary skill is in the case where having read the present invention
After stating technical scheme, it is clear that technical scheme therein or some technical characteristics can be combined or replaced, changed,
This is also fallen within protection domain of the presently claimed invention.
As Figure 1-Figure 2, the miberal powder of the embodiment of the present invention also original system 100, including：Reduction reaction device 1, pre- hot charging
Put 3, gas-solid separating device 4 and raw material cabin 5.
The span of the miberal powder of the embodiment of the present invention also powder particle size that original system 100 is directed to is 0.05mm-3mm.
Limit reduction reaction chamber a in reduction reaction device 1, reduction reaction device 1 on top-down direction according to
It is secondary provided with the first charging aperture 11 for connecting and being spaced with reduction reaction chamber a, reduction offgas outlet 12, also Primordial Qi import 13
With the first discharging opening 14, reduction reaction chamber is thought provided with heating component 15 between reduction offgas outlet 12 and also Primordial Qi import 13
Reduction reaction in a of room provides thermal source.
First charging aperture 11 is located on reduction reaction chamber a roof.Feed hopper 111 is provided with first charging aperture 11, is entered
The cross section of hopper 111 is gradually reduced that material envelope can be formed in charging on top-down direction.
Between feed hopper 111 and reduction offgas outlet 12, on top-down direction, in reduction reaction device 1 also
Provided with the first push-pull valve 171, the second push-pull valve 172, the material leakage cone 18 being spaced successively and Vibrating Distribution Screen 19.It thereby may be ensured that
The heat utilization efficiency of reduction reaction chamber a sealing, the uniformity of miberal powder distribution and reduction reaction device 1, it is to avoid waste energy consumption.
Heating component 15 is the heat accumulation type radiant tube 151 of multiple settings spaced in the horizontal direction, heat accumulation type radiant tube
151 it is horizontally extending, the two ends of heat accumulation type radiant tube 151 are respectively equipped with burner, the alternately igniting combustion of two burners
Burn.Control the temperature difference on each heat accumulation type radiant tube 151 to be no more than 30 DEG C, miberal powder is occurred reduction reaction with reduction tail gas
The temperature in region is 900 DEG C -1200 DEG C.
The reduction reaction mechanism of miberal powder and reducing gas is：MexOy+CO → Me+CO2, MexOy+H2 → Me+H2O.
Opening up air distribution plate 131 is provided with also at Primordial Qi import 13.The reducing gas discharged from air distribution plate 131 and whereabouts
Reduction reaction generation solid product exchange heat with the temperature for reducing solid product, pre- hot reducing gas, make the reduction after heat exchange
Gas temperature makes the temperature of the solid product after heat exchange be down to 600 DEG C -900 DEG C up to 300 DEG C -600 DEG C.
Between the also discharging opening 14 of Primordial Qi import 13 and first, reduction reaction chamber a periphery wall is provided with water-cooling wall 16.
Water-cooling wall 16 is distributed in the bottom of reduction reaction chamber a periphery wall, and water-cooling wall 16 includes fluid intake 161 and fluid issuing
162.The inside of water-cooling wall 16 is the water of flowing.Solid product is behind the region of water-cooling wall 16, and the temperature of solid product can drop
To normal temperature.
First discharging opening 14 is located on reduction reaction chamber a bottom wall, and conveying worm is additionally provided with the first discharging opening 14
141。
Limited in preheating device 3 and be additionally provided with second charging aperture 31 on preheating chamber b, the side wall of preheating device 3.Raw material cabin
5 are connected with second charging aperture 31, and the miberal powder in raw material cabin 5 is entered in preheating chamber b by second charging aperture 31.Enter second
The bottom of material mouth 31 is additionally provided with air inlet 32, and air inlet 32 is connected to limit gas passage c, gas with reduction offgas outlet 12
The speed and flow of the reduction tail gas entered in passage c provided with air blower 33 with control in preheating chamber b.
In preheating chamber b, opening up air devider 321 is additionally provided with air inlet 32, on top-down direction,
The cross section of air devider 321 gradually increases.Second discharging opening 34 is located at preheating chamber b top.
Multiple striker plates 36 are additionally provided with preheating chamber b, multiple striker plates 36 are uniform in preheating chamber b circumferential direction
Ground is arranged at intervals, and the two ends of each striker plate 36 are connected with preheating chamber b bottom wall and side wall respectively, and each shelves flitch 36
There is certain angle between bottom wall.
The miberal powder in preheating chamber b is put into by second charging aperture 31 under the blowing force of reduction tail gas and screening effect to pass through
Second discharging opening 34 discharge preheating chamber b.Preheating chamber b bottom is additionally provided with the 3rd discharging opening 35, under drop down onto preheating chamber b bottoms
The miberal powder in portion discharges preheating chamber b through the 3rd discharging opening 35.
Gas-solid separating device 4 and the second discharging opening 34, which are connected, the miberal powder discharged to separate from the second discharging opening 34 and goes back protocercal tail
Gas, the solid outlet 41 of gas-solid separating device 4 is connected the miberal powder isolated putting into feed hopper 111 with first charging aperture 11
It is interior.The reduction tail gas isolated discharges gas-solid separating device 4 by gas vent 42.
The specific example that two miberal powders using the embodiment of the present invention also original system 100 carries out reduction reaction is described below.
Embodiment one：It is 65% to Iron grade using the miberal powder also original system 100 of the embodiment of the present invention, powder particle size is less than
The iron ore concentrate of 0.074mm and ratio no less than 80% carries out reduction reaction.The bulk temperature for controlling heating component 15 is 950 DEG C,
It is that 80%, H2 volume fractions are 15% to enter CO volume fractions in the reduction tail gas in reduction reaction chamber a.Final metallization
The degree of metalization of powder iron is 95%.
Embodiment two：It is 65% to Iron grade using the miberal powder also original system 100 of the embodiment of the present invention, powder particle size is less than
The iron ore concentrate of 0.5mm and ratio no less than 80% carries out reduction reaction.The bulk temperature for controlling heating component 15 is 950 DEG C, is entered
It is that 60%, H2 volume fractions are 30% to enter into the reduction tail gas in reduction reaction chamber a CO volume fractions.Final metallization powder
The degree of metalization for expecting iron is 95%.
Other of miberal powder according to embodiments of the present invention also original system 100 are constituted and operated for ordinary skill
All it is known for personnel, is not detailed herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example are described
Structure, material or feature are contained at least one embodiment of the present invention or example.In this manual, to above-mentioned term
Schematic representation is not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can in an appropriate manner be combined in any one or more embodiments or example.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
1. a kind of miberal powder also original system, it is characterised in that including：
Limit reduction reaction chamber in reduction reaction device, the reduction reaction device, the reduction reaction device is from upper
And under direction on be sequentially provided with to go out with the reduction reaction chamber and the first charging aperture being spaced, reduction tail gas
Mouth, also Primordial Qi import and the first discharging opening, heating component is provided between the reduction offgas outlet and the also Primordial Qi import
To provide thermal source for the reduction reaction in the reduction reaction chamber；
Limited in preheating device, the preheating device and be additionally provided with the second charging on preheating chamber, the side wall of the preheating device
Mouthful, the miberal powder is entered in the preheating chamber by the second charging aperture, also set in the bottom of the second charging aperture
There is an air inlet, the air inlet is connected to limit gas passage with by the reduction reaction chamber with the reduction offgas outlet
Interior reduction tail gas is imported in the preheating chamber, to be preheated to the miberal powder in the preheating chamber, described pre-
In hot chamber, opening up air devider is additionally provided with the air inlet, second is additionally provided with the top of the second charging aperture
Discharging opening, the miberal powder discharges the preheating chamber under the drive of the reduction tail gas by second discharging opening, described
The bottom of preheating chamber is additionally provided with the 3rd discharging opening, under drop down onto the miberal powder of the preheating chamber bottom through the 3rd discharging
The mouth discharge preheating chamber；
Gas-solid separating device, the gas-solid separating device is connected with second discharging opening, the solid of the gas-solid separating device
Outlet is connected with the first charging aperture.
2. miberal powder according to claim 1 also original system, it is characterised in that air blower is provided with the gas passage.
3. miberal powder according to claim 1 also original system, it is characterised in that on top-down direction, described point of wind
The cross section of device gradually increases.
4. miberal powder according to claim 1 also original system, it is characterised in that be additionally provided with striker plate in the preheating chamber,
Circumferential direction extension of the striker plate along the preheating chamber, the bottom of the two ends of the striker plate respectively with the preheating chamber
Wall and the connection of side wall, and there is certain angle between the shelves flitch and the bottom wall.
5. miberal powder according to claim 1 also original system, it is characterised in that the heating component for it is multiple in the horizontal direction
Or the heat accumulation type radiant tube of the spaced setting of vertical direction, the two ends of the heat accumulation type radiant tube are respectively equipped with burner, two
The individual burner alternating ignition.
6. miberal powder according to claim 1 also original system, it is characterised in that the reduction reaction device also includes water cooling
Wall, the water-cooling wall is positioned at described also between Primordial Qi import and first discharging opening, and it is anti-that the water-cooling wall is located at the reduction
Answer on the periphery wall of chamber.
7. miberal powder according to claim 1 also original system, it is characterised in that the reduction reaction device also includes spiral transferring
Machine is sent, conveying worm is located at the first discharge outlet.
8. miberal powder according to claim 1 also original system, it is characterised in that it is anti-that the first charging aperture is located at the reduction
Answer on the roof of chamber, feed hopper is provided with the first charging aperture, the cross section of the feed hopper is in top-down direction
On be gradually reduced with charging when can be formed material envelope.
9. miberal powder according to claim 1 also original system, it is characterised in that the reduction reaction device also includes multiple insert
Plate valve, the multiple push-pull valve is located between the first charging aperture and the reduction offgas outlet, in top-down direction
Upper the multiple push-pull valve is arranged at intervals, and the two neighboring push-pull valve is alternately opened and closed during charging.
10. miberal powder according to claim 9 also original system, it is characterised in that the reduction reaction device also includes：Set
Material leakage cone and Vibrating Distribution Screen below the multiple push-pull valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710614425.5A CN107227392A (en) | 2017-07-25 | 2017-07-25 | Miberal powder also original system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710614425.5A CN107227392A (en) | 2017-07-25 | 2017-07-25 | Miberal powder also original system |
Publications (1)
| Publication Number | Publication Date |
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| CN107227392A true CN107227392A (en) | 2017-10-03 |
Family
ID=59956149
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|---|---|---|---|
| CN201710614425.5A Pending CN107227392A (en) | 2017-07-25 | 2017-07-25 | Miberal powder also original system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107880917A (en) * | 2017-11-21 | 2018-04-06 | 北京神雾电力科技有限公司 | A kind of up heat storage type pyrolysis stove and method for pyrolysis |
| CN107903924A (en) * | 2017-11-21 | 2018-04-13 | 北京神雾电力科技有限公司 | A kind of uplink heat accumulating type fine coal fast pyrogenation reaction system and method |
| CN107903923A (en) * | 2017-11-21 | 2018-04-13 | 北京神雾电力科技有限公司 | A kind of uplink pressurization heat storage type pyrolysis stove and method for pyrolysis |
-
2017
- 2017-07-25 CN CN201710614425.5A patent/CN107227392A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107880917A (en) * | 2017-11-21 | 2018-04-06 | 北京神雾电力科技有限公司 | A kind of up heat storage type pyrolysis stove and method for pyrolysis |
| CN107903924A (en) * | 2017-11-21 | 2018-04-13 | 北京神雾电力科技有限公司 | A kind of uplink heat accumulating type fine coal fast pyrogenation reaction system and method |
| CN107903923A (en) * | 2017-11-21 | 2018-04-13 | 北京神雾电力科技有限公司 | A kind of uplink pressurization heat storage type pyrolysis stove and method for pyrolysis |
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