CN106521068A - Rotational flow iron smelting method and rotational flow iron smelting device - Google Patents
Rotational flow iron smelting method and rotational flow iron smelting device Download PDFInfo
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- CN106521068A CN106521068A CN201610950047.3A CN201610950047A CN106521068A CN 106521068 A CN106521068 A CN 106521068A CN 201610950047 A CN201610950047 A CN 201610950047A CN 106521068 A CN106521068 A CN 106521068A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
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Abstract
The invention discloses a rotational flow iron smelting method. The rotational flow iron smelting method comprises following steps: a mixed material is delivered into a reaction tower through a material channel; reaction gas is converted into rotational flow, and is delivered into the reaction tower through a rotational flow channel and a Venturi channel; a solid reducing agent is sprayed into a settling pond so as to form a reducing agent floating layer; the rotational flow processed via high speed expansion is subjected to contact reaction with the mixed material in the reaction tower; obtained molten drops are subjected to reaction with the reducing agent floating layer so as to obtain iron and slag, and crude iron is obtained via separation; generated high temperature gas is ignited by a burning gun in an uptake flue, and residual gas is discharged from a smelting furnace into a heat recovery boiler. The rotational flow iron smelting method possesses following advantages: full smelting reaction is realized, oxygen utilization rate is high, reaction gas with an oxygen-enriched concentration can be adopted, requirements of large fluctuation of feeding amount are satisfied, energy yield is increased obviously, energy consumption is reduced, and environment protection effect is improved. The invention also provides a rotational flow iron smelting device suitable for the rotational flow iron smelting method.
Description
Technical field
The present invention relates to non-ferrous metal pyrometallurgical smelting technical field, ferrum smelting process is floated in more particularly to a kind of rotation, of the invention
Further relate to the floating ferrum smelting device of a kind of rotation suitable for the floating ferrum smelting process of above-mentioned rotation.
Background technology
Ironmaking is the technical process for extracting metallic iron from iron-bearing mineral (the predominantly oxide of ferrum), is made at present
With it is more be blast furnace process, its operating process is：Load iron ore, coke, slag making with flux (limestone) from furnace roof during production,
And preheated air is blown into into stove from positioned at lower furnace.At high temperature coke (blast furnace having also coal injection, heavy oil,
The auxiliary fuels such as natural gas) in carbon burn with the oxygen in the air that blasts and generate carbon monoxide, carbon monoxide in the stove on
Oxygen, sulfur during rising in removing iron ore, phosphorus, reduction obtain metallic iron.In above-mentioned reaction, the molten iron produced is put from stove
Go out, unreduced impurity (predominantly stone-like pulse SiO in iron ore2) and the flux such as limestone combine the slag for generating (predominantly
CaSiO3Deng), discharge from cinder notch.
Ironmaking uses blast furnace, but blast furnace ironmaking needs roasting briquetting and coking coal etc., there is long flow path, invests big, raw
Produce the low problems of efficiency, it is often more important that high energy consumption, environmental pollution are serious.
Therefore, the smelting of ferrum how more efficiently, is simply realized, current those skilled in the art is had become and is urgently solved
Problem certainly.
The content of the invention
In view of this, the invention provides a kind of floating ferrum smelting process of rotation, which can further improve sulfuration iron compound
Metallurgical effect, present invention also offers suitable for a kind of floating ferrum smelting device of rotation of the floating ferrum smelting process of above-mentioned rotation.
In order to achieve the above object, the present invention provides following technical scheme：
Ferrum smelting process is floated in a kind of rotation, is comprised the following steps：
The dry Iron Ore Powder of order, flux and solid reductant are mixed in proportion to form mixed material, and make the mixture
Material is entered in the material channel of nozzle, then in the reaction tower that the material channel enters into smelting furnace；
Reacting gas forms eddy flow under the cyclone effect of the nozzle, and it is logical to enter into the rotational flow gas of the nozzle
In road, the eddy flow under the guiding of the rotational flow gas passage through the nozzle venturi passage, and eventually enter into institute
State reaction tower；
By the auxiliary oxygen passage and auxiliary fuel path of the nozzle in the reaction tower supplement reacting gas and/
Or fuel；
Solid reductant is sprayed into in the sedimentation tank in the reaction tower, with the solution surface in the sedimentation tank
Form reducing agent floating layer；
Through the eddy flow expanded at a high speed by the venturi passage, with the mixed material in the reaction tower
Haptoreaction；
Haptoreaction generate molten drop drop in the sedimentation tank, contact with the reducing agent floating layer react and
The metallic iron for generating metallic iron and slag, the slag and molten state is separated into the bottom of the reducing agent floating layer,
To obtain molten iron；
The high-temperature gas that haptoreaction is generated, the space at the top of Jing sedimentation tanks enters into the uptake flue of the smelting furnace
In, and uptake flue described in Jing drains into waste heat boiler from the smelting furnace, to carry out waste heat recovery.
Preferably, in the floating ferrum smelting process of above-mentioned rotation, the process for conveying the mixed material to the nozzle also include with
Lower operation：
The mixed material is sent in the nozzle using conveying pipeline, and is introduced into the fluidisation dispenser of the nozzle
In fluidized, then enter back in the material channel.
Preferably, in the floating ferrum smelting process of above-mentioned rotation, while the solid reductant is sprayed into, also to the sedimentation tank
Middle penetrating oxygen-enriched air.
Preferably, it is in the floating ferrum smelting process of above-mentioned rotation, further comprising the steps of：
Make the high-temperature gas be back to after waste heat recovery and dust removal process in the nozzle, with the reaction gas
Body mixes.
Preferably, in the floating ferrum smelting process of above-mentioned rotation, in the reacting gas, CO (carbon monoxide converter) gas are mixed with.
Preferably, in the floating ferrum smelting process of above-mentioned rotation, the flux is limestone particle, and the solid reductant is coal dust
Or in coke, and the Iron Ore Powder, the flux and the solid reductant, water content is respectively less than 0.5%.
Preferably, in the floating ferrum smelting process of above-mentioned rotation, it is 220m/s that the eddy flow enters the rotation flow velocity of the smelting furnace
～300m/s.
Preferably, in the floating ferrum smelting process of above-mentioned rotation, the flow that the auxiliary gas passage sprays into the reacting gas is
100Nm3/ h～1000Nm3/ h, it is 0Nm that the auxiliary fuel path sprays into the flow of fuel3/ h～500Nm3/h。
A kind of floating ferrum smelting device of rotation, including conveying pipeline, smelting furnace, and connects the conveying pipeline and the smelting furnace
Nozzle, it is adaptable to the floating ferrum smelting process of rotation described in above-mentioned any one, wherein：
The nozzle includes：The rotational flow gas passage of water conservancy diversion reacting gas, sets on the air inlet of the rotational flow gas passage
It is equipped with cyclone；The venturi passage being arranged in the rotational flow gas passage；The outside of the rotational flow gas passage is set in,
And the material channel connected with the conveying pipeline；The auxiliary oxygen passage being arranged in the rotational flow gas passage；It is set in institute
State the outside of auxiliary oxygen passage, and the auxiliary fuel path in the rotational flow gas passage；
The smelting furnace includes：It is opened on the body of heater of the smelting furnace, for spraying in the sedimentation tank to the smelting furnace
Enter the reducing agent entrance of solid reductant；It is opened on the body of heater of the smelting furnace, in the sedimentation tank to the smelting furnace
Spray into the air intake of oxygen-enriched air；It is opened on the body of heater of the smelting furnace, can derives respectively and be divided in the sedimentation tank
From different solid products the outlet of multiple products.
Preferably, in the floating ferrum smelting device of above-mentioned rotation, the minimum diameter d of the venturi passage, no more than described eddy flow
The internal diameter D of gas passage, and it is more than D/2.
Preferably, in the floating ferrum smelting device of above-mentioned rotation, the cyclone is by entering perpendicular to the rotational flow gas passage
Trachea, is connected to be formed with the rotational flow gas passage, and the air inlet pipe and the rotational flow gas channel connection form gas
Entrance, the gas access include the contraction mouth near the air inlet pipe and the tangential mouth near the rotational flow gas passage.
Preferably, in the floating ferrum smelting device of above-mentioned rotation, the position that the material channel is connected with the conveying pipeline is provided with
Fluidisation dispenser, and the conveying pipeline is obliquely installed relative to the material channel, the conveying pipeline is with respect to the horizontal plane
Angle of inclination is 10 degree～40 degree.
Preferably, in the floating ferrum smelting device of above-mentioned rotation, also including being set on the outer wall of the auxiliary fuel path, and energy
The cone governor that enough axial reciprocatings along the auxiliary fuel path are moved, and be arranged on outside the roof of the rotational flow gas passage
Side, controls the controller of the cone governor movement.
Preferably, in the floating ferrum smelting device of above-mentioned rotation, the rotational flow gas passage, the venturi passage, the material
Passage, the auxiliary oxygen passage and the auxiliary fuel path are coaxially disposed, and the roof of the rotational flow gas passage is
Curved wall.
Preferably, in the floating ferrum smelting device of above-mentioned rotation, the auxiliary fuel path, the gas outlet of the auxiliary oxygen passage
It is concordant with the gas outlet of the rotational flow gas passage to arrange.
Ferrum smelting process is floated in the rotation that the present invention is provided, and its operating process is：By dry Iron Ore Powder, flux and solid by than
Example mixing, to form mixed material, and mixed material is uniformly sent in the material channel of nozzle, and mixed material is in gravity
In the presence of Jing material channels enter in the reaction tower of smelting furnace；Reacting gas is entered in the cyclone of nozzle, makes reaction
Gas forms eddy flow and tangentially enters in rotational flow gas passage and forms Whirl deposite tank, with rotating flow in rotational flow gas passage
Dynamic mode to reaction tower move, in this moving process, Whirl deposite tank after venturi passage, Whirl deposite tank with high speed expansion,
The mode of eddy flow is injected into reaction tower, forms jetstream whirl gas；Region to the close sedimentation tank of reaction tower bottom is uniform
Solid reductant is sprayed into, is made solid reductant fall in sedimentation tank, and is swum in the solution surface in sedimentation tank, formed hot
Reducing agent floating layer；Jetstream whirl gas is quickly contacted with the mixed material into reaction tower in the presence of high speed expands, and
In the presence of eddy flow, rotational flow gas enter mixture material volume inspiration in jet-stream wind, with the continuous rising of temperature, mixture
Material is constantly collided and fast reaction with reacting gas, is reacted the molten drop for generating and is fallen in hot reducing agent floating layer first, leads to
Cross reducing agent floating layer and the iron oxides in molten drop are reduced to into ferrum, haptoreaction and reduction are generated afterwards slag and molten
The metallic iron of state enters into the bottom of reducing agent floating layer, and is further separated into iron layer and slag blanket；The height that haptoreaction is produced
Wet body, the space on Jing sedimentation tanks top enter uptake flue, and drain into waste heat boiler by above-mentioned flue from smelting furnace.
The floating ferrum smelting process of rotation that the present invention is provided, by make reacting gas with the mode such as expansion, eddy flow at a high speed with mix
Material haptoreaction, enabling to smelt react more fully is carried out, and oxygen utilization rate is improved, slag iron-holder drop
Low, flue dust incidence rate is also reduced, while flue gas can also be improve using the reacting gas of higher oxygen-rich concentration
Content of sulfur dioxide, makes the heat that flue gas is taken away reduce, but also can adapt to the needs of inventory wide fluctuations, make production capacity
It is obviously improved, also, is reduced energy consumption, is improve environment protecting.
The floating ferrum smelting device of rotation that the present invention is provided, mainly including conveying pipeline, smelting furnace and connection conveying pipeline and smelting
The nozzle of stove, nozzle therein include rotational flow gas passage, cyclone, venturi passage, material channel again.Cyclone is arranged on
On the air inlet of rotational flow gas passage, the reacting gas for making to enter in rotational flow gas passage forms eddy flow, reacting gas
After forming eddy flow, in guiding lower edge its axial turn of rotational flow gas passage, and venturi passage is due to being fixedly installed on eddy flow
On the inwall of gas passage, so eddy flow can be entered in venturi passage, in the presence of venturi passage so that eddy flow with
The state of expansion enters into (specially in the reaction tower of smelting furnace) in smelting furnace at a high speed, meanwhile, the mixed material Jing of powder
Cross conveying pipeline to enter in the material channel being set on the outside of rotational flow gas passage, and together enter with the reacting gas for forming eddy flow
Enter in smelting furnace so that mixed material in high temperature environments by volume inspiration eddy flow in, and with reacting gas constantly collision and it is fast
Speed reaction, subsequently into the sedimentation tank below reaction tower in, be separated iron layer and slag blanket, react the high-temperature gas for producing and be rich in
Sulfur dioxide, is drained in waste heat boiler to other purposes from smelting furnace.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can be with basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is the structural representation of the floating ferrum smelting device of rotation provided in an embodiment of the present invention；
Fig. 2 is a kind of structural representation of nozzle；
Fig. 3 is the structural representation of another kind of nozzle；
Operating diagrams of the Fig. 4 for cyclone.
In Figs. 1-4：
1- nozzles, 2- fluidisation dispensers, 3- conveying pipelines, 4- smelting furnaces；
101- rotational flow gas passages, 102- cyclones, 103- venturi passages, 104- material channels, 105- roofs, 106-
Auxiliary oxygen passage, 107- auxiliary fuel paths, 108- cone governors, 109- controllers；
1021- air inlet pipe, 1022- contraction mouths, the tangential mouths of 1023-.
Specific embodiment
The invention provides ferrum smelting device is floated in a kind of rotation, which can further improve the metallurgical effect of iron sulfide.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As Figure 1-Figure 4, the floating ferrum smelting device of rotation provided in an embodiment of the present invention, mainly includes conveying pipeline 3, smelting furnace
4 and connection conveying pipeline 3 and smelting furnace 4 nozzle 1, the application is mainly improved to nozzle 1, specifically, after improvement
Nozzle 1 includes：The rotational flow gas passage 101 of water conservancy diversion reacting gas, being provided with the air inlet of rotational flow gas passage 101 makes reaction
Gas forms the cyclone 102 of eddy flow；Coaxially it is located in rotational flow gas passage 101 and connects with the inwall of rotational flow gas passage 101
The venturi passage 103 for connecing, forms the reacting gas of eddy flow after venturi passage 103, and reacting gas is with high speed expansion, rotation
The mode of stream is injected into the reaction tower of smelting furnace 4, forms jetstream whirl gas；It is set in rotational flow gas cylinder passage 101, is used for
The auxiliary oxygen passage 106 of supplemental oxygen or reacting gas into the reaction tower of smelting furnace 4, and it is set in auxiliary oxygen passage
106 outside, for spraying into fuel to supplement the auxiliary fuel path 107 of reaction institute calorific requirement, such as Fig. 2 and Tu into reaction tower
Shown in 3.The material channel 104 for being set in the outside of rotational flow gas passage 101 and being connected with conveying pipeline 3, material channel 104 are used for
Conveying is mixed in proportion the mixed material for being formed by dry Iron Ore Powder, flux and solid reductant.
, when being operated, the mixed material sent by conveying pipeline 3 is through material channel 104 for the floating ferrum smelting device of above-mentioned rotation
Enter in the reaction tower of smelting furnace 4, at the same time, reacting gas is entered in rotational flow gas passage 101, enters into cyclone gas
During body passage 101, eddy flow is formed during reacting gas is first into cyclone 102, afterwards in rotational flow gas passage
The axial movement of 101 guiding lower edge rotational flow gas passage 101, and enter in venturi passage 103, in venturi passage
In the presence of 103 so that eddy flow is entered in reaction tower with the state of high speed expansion, jetstream whirl gas is formed.Auxiliary oxygen
Passage 106 and auxiliary fuel path 107, spray into reacting gas or oxygen, auxiliary combustion using auxiliary oxygen passage 106 to reaction tower
Material passage 107 sprays into fuel to reaction tower, while the oxygen needed for reaction heat and reaction is provided, also acts as reinforcing gas-solid mixed
Conjunction, the effect of 1 rotational flow gas of accelerating jet expansion.Jetstream whirl gas is quickly reacted with entering in the presence of high speed expands
The mixed material contact of tower, and under cyclonic action, mixture material volume inspiration is entered in jetstream whirl gas, with temperature not
Disconnected to raise, mixed material is constantly collided and fast reaction with reacting gas, subsequently into the sedimentation tank below reaction tower (in figure not
Illustrate) in, crude iron and slag is separated, reaction produces high-temperature gas, and the space on Jing sedimentation tanks top enters the rising of smelting furnace 4
Flue (not shown), Jing this uptake flue drain into waste heat boiler from smelting furnace, again through dust removal process after recovery waste heat, return
Mix with former reacting gas in returning to nozzle and form the reacting gas that is mixed with CO (carbon monoxide converter) gas.
The floating ferrum smelting device of rotation that the present embodiment is provided, by being set to said structure by nozzle 1 so that gas-solid contact
More fully, so as to make smelting reaction fully can carry out, oxygen utilization rate is improved, and slag iron-holder is reduced, and flue dust is sent out
Raw rate is also reduced.The sulfur dioxide of flue gas can also be improve using the reacting gas of higher oxygen-rich concentration simultaneously
Content, makes the heat that flue gas is taken away reduce, but also can adapt to the needs of inventory wide fluctuations, make production capacity be shown
Write and lifted, and energy consumption is low, small investment, environment protecting are more preferable.Also, also have the advantages that adaptability to raw material is strong, can be to iron content
The iron ore concentrate of 25%-70% is smelted.
In addition, the reaction compartment of said structure is little, as reacting gas is flowed with cyclone mode so that nothing in reaction compartment
Reaction dead zone, and it is less to washing away for fire resisting material of furnace body, and the nozzle 1 after improving, simple structure, operation, control, behaviour
Work, maintenance etc. are convenient, reliable, can make full use of the potential energy of fluid, and operating cost is relatively low, and operating rate is higher.
For further optimisation technique scheme, in the floating ferrum smelting device of the rotation that the present embodiment is provided, venturi passage 103
Minimum diameter is d, and the internal diameter of rotational flow gas passage 101 is D, then preferably D/2<D≤D, as shown in Figures 2 and 3, venturi passage
103 radius of the radian is R, then preferably d<R<D.The selection of above-mentioned numerical range, advantageously in the high speed expansion of reacting gas,
So as preferred.Also, it is preferred that the bottom of venturi passage 103 is the circular arc and cyclone gas of venturi passage 103
The intersection point of 101 vertical wall of body passage, the setting can to reacting gas more further play a part of accelerated expansion, make reaction
Gas meets the requirement of eddy flow wind speed 220m/s-300m/s after into reaction tower, and makes air-flow rapid expanding, and volume inhales eddy flow week
The mixed material for enclosing, makes the gas-solid rotary fluid energy to be formed bigger, and the multiple impacts reaction to promoting gas-solid, solid-solid is provided
Better reaction condition.
Additionally, the venturi passage 103 in the present embodiment can also only include contraction section and circle larynx section, the port of circle larynx section
It is concordant with the gas outlet of rotational flow gas passage 101 to arrange, as shown in Figure 3.This kind of set-up mode, can equally play reacting gas
The effect of rapid expanding, so also as a kind of preferred structure.
In the present embodiment, cyclone 102 includes：Cyclone pipe；The air inlet pipe 1021 tangentially connected with cyclone pipe, air inlet pipe
1021 connect the gas access to be formed with cyclone pipe, including the contraction mouth 1022 near air inlet pipe 1021 and cutting near cyclone pipe
To mouth 1023, as shown in Figure 4.In order that structure is simpler, the side of the preferred contraction mouth of the present embodiment 1022 is cyclone pipe
Outer wall, opposite side form contraction mouth 1022 and are.
Preferably, the position that material channel 104 is connected with conveying pipeline 3 is provided with fluidisation dispenser 2, as shown in Figure 1.This reality
Apply in example, set up the effect of fluidisation dispenser 2, be in order that mixed material uniformly can more uniformly enter material channel
In 104, and then more uniformly enter in reaction tower, so as to farthest prevent the generation of segregation phenomena, order reaction effect
Fruit more projects.
Further, conveying pipeline 3 is obliquely installed relative to material channel 104, the inclination angle with respect to the horizontal plane of conveying pipeline 3
Spend for 10 degree～40 degree.In the present embodiment, make conveying pipeline 3 be obliquely installed relative to the overall nozzle 1 for vertically arranging, be
The impulsive force of nozzle 1 is directly entered to farthest reduce material, so as to avoid because impulsive force is excessive and in nozzle 1
Structure causes damage；In addition, making the angle of inclination with respect to the horizontal plane of conveying pipeline 3 be preferably 10 degree～40 degree, enable to mix
Compound material can flow into fluidisation dispenser 2 through less gradient, make mixed material more uniformly enter nozzle 1, be reaction
Abundant reaction in tower provides better condition.
In the present embodiment, also including being set on the outer wall of auxiliary fuel path 107, and can be along auxiliary fuel path
The cone governor 108 of 107 axial reciprocating movement, and be arranged on the outside of the roof 105 of rotational flow gas passage 101, control to adjust
The controller 109 of 108 movement of cone.In the present embodiment, preferably screw thread is provided with the outer wall of the auxiliary fuel path 107 of tubulose,
Cone governor 108 is connected with auxiliary fuel path 107 by screw thread, when the control auxiliary combustion of controller 109 being arranged on roof 105
When material passage 107 rotates, it becomes possible to which that realizes cone governor 108 moves up and down (similar to screw-nut body).The present embodiment is also
It is preferred that the mobile lower limit amount of cone governor 108 is at the minimum diameter of venturi passage 103.By arranging said structure, Ke Yiman
Under foot difference working condition, the regulation to air quantity, wind speed is required, makes reacting gas have rapid expanding eddy flow after entering reaction tower
Effect, it is ensured that reaction is fully carried out.
As shown in Figures 2 and 3, preferably rotational flow gas passage 101, venturi passage 103, material channel 104, auxiliary oxygen
Passage 106 and auxiliary fuel path 107 are coaxially disposed.The present embodiment preferably above-mentioned part is coaxially disposed, and enables to nozzle 1
Structure distribution more compact and reasonable, functional reliability is also of a relatively high, while reacting gas, mixed material can also be realized more
Plus uniform contact, mixing, therefore as preferred version.
More further, the roof 105 of further preferably rotational flow gas passage 101 be curved wall, i.e. arch roof, such as Fig. 2 and
Shown in Fig. 3.The structure is conducive to the eddy flow that reacting gas is formed quickly to move down, flat-tope structure compared to existing technology, its
Less to the influential effect of eddy flow helical flow, (i.e. near the direction of reaction tower) is mobile downwards can to promote eddy flow
Hurry up.
In the present embodiment, auxiliary fuel path 107, auxiliary oxygen passage 106 gas outlet preferably with rotational flow gas passage
101 gas outlet is concordantly arranged.It is fully mixed in reaction tower with reacting gas that this kind of set-up mode is also beneficial to mixed material
Close.
In order that technical scheme is more perfect, in the floating ferrum smelting device of the rotation that the present embodiment is provided, also include：It is opened in smelting
On furnace 4, for the reducing agent entrance (not shown) for spraying into solid reductant in the sedimentation tank to smelting furnace 4；It is opened in
On smelting furnace, for spraying into oxygen-enriched air in the sedimentation tank to smelting furnace, (oxygen-enriched air refers to the volume fraction of oxygen and is more than
The air of the average oxygen purity in normal air) air intake (not shown)；It is opened on smelting furnace, can
Derived in sedimentation tank respectively and exported (not shown in figure by multiple products of detached different solid products.By aforesaid
The floating ferrum smelting device of rotation transformed to nozzle 1 is smelted the one-level slag for obtaining and (for the ease of distinguishing, haptoreaction is generated
Slag containing ferrum oxide is referred to as one-level slag, and the slag without ferrum oxide generated after being reduced by solid reductant is referred to as two grades of slags)
In, the still ferrum containing high level (in the form of ferrum oxide in slag), so the straight receipts in order to further improve ferrum
Rate, the present embodiment are further preferably improved to the structure of original smelting furnace 4 (specially Flash Smelting Furnace), i.e., open on smelting furnace 4
If the outlet of reducing agent entrance, air intake and product.Wherein, reducing agent entrance is at least one, and is opened in smelting furnace 4
Tower bottom is reacted near the position of sedimentation tank, for spraying into solid reductant, and the solid reductant being sparged into into smelting furnace 4
Can drop in sedimentation tank；Air intake is at least one, and is opened in the reaction tower bottom of smelting furnace 4 near sedimentation tank
Position, can be used for the region in reaction tower near sedimentation tank and blasts oxidizing gas, such as oxygen-enriched air or oxygen, carry out
Oxidation operation, to reduce the carbon content in molten iron (i.e. the metallic iron of molten state), it is ensured that molten steel quality is stable；At least one life
Also the setting area of sedimentation tank is opened in into thing outlet, which is particularly for the cinder notch for deriving slag.Haptoreaction carry out it is same
When, it is according to reaction tower response situation and the iron-holder of one-level slag, uniform near the region of sedimentation tank in reaction tower bottom in time
Solid reductant is sprayed into, and suitably adjusts the amount that solid reductant is sprayed into so that solid reductant can be in the solution of sedimentation tank
Top formed one layer of hot reducing agent floating layer, make reaction tower reaction produced by one-level slag in iron oxides fall into it is heavy
Shallow lake is reduced during pond, forms metallic iron, reduces the generation of iron oxides, so as to reducing the iron-holder of slag and improving ferrum
Direct yield.
In the present embodiment, it is improved by the structure to nozzle 1, makes mixed material mix homogeneously with reacting gas, and
The multiple-contact reaction of gas-solid, solid-solid and gas-gas can be realized, with reaction fully, coefficient of oxygen utilization it is high, metallic iron growing amount
Height, the low advantage of iron oxides.The structure of smelting furnace 4 is improved so that the solution that reaction tower is formed is deposited to sedimentation tank
When, the ferrum oxide in one-level slag is reduced to gold by the solid reductant formation reducing agent floating layer that the reducing agent entrance of setting is added
Category ferrum, then carries out settlement separate, forms slag blanket (predominantly two grades slags, it is also possible to there is one-level slag) and metal iron layer.
The present embodiment additionally provides a kind of floating ferrum smelting process of rotation, and the method can be applied to the floating ferrum of above-mentioned rotation and smelt dress
Put, comprise the following steps：
The first step, makes dry Iron Ore Powder, flux and solid reductant be mixed in proportion to be formed Jing after metering device is weighed
Mixed material, is sent to mixed material in nozzle 1 using conveying pipeline 3, and makes mixed material be introduced into the fluidisation feed of nozzle 1
Fluidized in device 2, then entered back in material channel 104, then entered into the reaction of smelting furnace 4 through material channel 104
In tower；
Second step, reacting gas are introduced in the cyclone 102 of nozzle 1 when into nozzle 1, and in cyclone 102
In the presence of form eddy flow, entered in the rotational flow gas passage 101 of nozzle 1 afterwards, eddy flow draws rotational flow gas passage 101
Lower helical flow, and the venturi passage 103 through being arranged in rotational flow gas passage 101 is led, and eventually enters into reaction tower；
3rd step, during reaction, can be with according to response situation, by 106 He of auxiliary oxygen passage of nozzle 1
Auxiliary fuel path 107 supplements reacting gas and/or fuel in reaction tower, to play the gas-solid mixing of reinforcing, accelerating jet 1
The effect of rotational flow gas expansion；
4th step, in order to further improve the direct yield of ferrum, sprays into solid reduction in the sedimentation tank in reaction tower
Agent, forms reducing agent floating layer with the solution surface in the sedimentation tank；
5th step, through the eddy flow expanded at a high speed by venturi passage 103, is contacted instead with mixed material in reaction tower
Should, for generating ferrum；
6th step, the molten drop that haptoreaction is generated are dropped in sedimentation tank, the one-level slag in molten drop is floated with reducing agent
Layer contact reacts and generates metallic iron and two grades of slags, and the metallic iron of two grades of slags and molten state enters the bottom of reducing agent floating layer
Portion is separated, and to obtain crude iron, (this crude iron includes the crude iron that haptoreaction is generated, and also include from one-level slag restoring is thick
Ferrum)；
7th step, the high-temperature gas rich in sulfur dioxide that haptoreaction is generated, the space at the top of Jing sedimentation tanks enters into
In the uptake flue of smelting furnace 4, and then waste heat boiler is drained into from smelting furnace 4, to carry out waste heat recovery, and enter into through removing
Dirt equipment carries out dedusting, makes the high-temperature gas after dedusting enter into and participate in nozzle 1 reaction.
It should be noted that above-mentioned each step is not limited to be operated in the order described above, meeting technological requirement
On the premise of, order can be overturned between above-mentioned different step or while carry out, for example, make reacting gas and mixed material same
When enter in nozzle 1.
In above process, while solid reductant is sprayed into, oxygen-enriched air is sprayed into in reaction tower, because due to conduct
The addition of the coal dust or coke of solid reductant, and play a part of reduction, CO (carbon monoxide converter) gas are inevitably produced, institute
To be rich in CO (carbon monoxide converter) gas in the high-temperature gas of generation, in order to make full use of the gas, the gas is made to return through waste heat boiler
Waste heat is received, and dedusting is carried out through cleaner so that high-temperature gas is purified, and makes high-temperature gas return to nozzle 1 afterwards
In, and reaction tower is entered as reacting gas, to improve resource utilization, reducing energy consumption by nozzle 1.
In the floating ferrum smelting process of rotation that the present embodiment is provided, it is containing carbon monoxide gas into the reacting gas in nozzle 1
The mixed gas of body, CO (carbon monoxide converter) gas therein can be as raw material pure CO (carbon monoxide converter) gas, or on
State and refer to contained CO (carbon monoxide converter) gas in high-temperature gas.
Specifically, in the floating ferrum smelting process of above-mentioned rotation, the eddy flow that preferred reactant gas are formed enters the rotating flow of smelting furnace 4
Speed is 220m/s～300m/s, aids in the flow that gas passage sprays into reacting gas to be 100Nm3/ h～1000Nm3/ h, auxiliary combustion
It is 0Nm that material passage 107 sprays into the flow of fuel3/ h～500Nm3/h.The selection of above-mentioned numerical value, the carrying out that can be reacted fully,
Further to improve metallurgical effect.Certainly, on the premise of ensureing that smelting reaction is normally carried out, above-mentioned parameter can also be other
Numerical value, the present embodiment are not limited to this.
Additionally, in Iron Ore Powder, flux and solid reductant, water content is respectively less than 0.5%；Flux be limestone particle or
The mixture of limestone particle and quartz sand particle, and the granularity of limestone particle and quartz sand particle is respectively less than 5mm；Solid
Reducing agent is coal dust or coke of the granularity less than 10mm.The selection of above-mentioned numerical value and material, also for more fully carrying
High reaction effect and the prioritizing selection made.Likewise, on the premise of ensureing that smelting reaction is normally carried out, above-mentioned parameter also may be used
Think other numerical value, the present embodiment is not limited to this.
Each part is described by the way of progressive in this specification, what the structure of each part was stressed is
With the difference of existing structure, the entirety of ferrum smelting device is floated in rotation and part-structure can be by the knot of the above-mentioned some of combination
Structure and obtain.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (15)
1. ferrum smelting process is floated in a kind of rotation, it is characterised in that comprised the following steps：
The dry Iron Ore Powder of order, flux and solid reductant are mixed in proportion to form mixed material, and enter the mixed material
Enter in the material channel of nozzle, then in the reaction tower that the material channel enters into smelting furnace；
Reacting gas forms eddy flow under the cyclone effect of the nozzle, and enters into the rotational flow gas passage of the nozzle
In, the eddy flow under the guiding of the rotational flow gas passage through the nozzle venturi passage, and eventually enter into described
Reaction tower；
Reacting gas and/or combustion are supplemented in the reaction tower by the auxiliary oxygen passage and auxiliary fuel path of the nozzle
Material；
Solid reductant is sprayed into in the sedimentation tank in the reaction tower, is formed with the solution surface in the sedimentation tank
Reducing agent floating layer；
Through the eddy flow expanded at a high speed by the venturi passage, contact with the mixed material in the reaction tower
Reaction；
The molten drop that haptoreaction is generated is dropped in the sedimentation tank, is contacted with the reducing agent floating layer and is reacted and generate
The metallic iron of metallic iron and slag, the slag and molten state is separated into the bottom of the reducing agent floating layer, with
To molten iron；
The high-temperature gas that haptoreaction is generated, the space at the top of Jing sedimentation tanks are entered in the uptake flue of the smelting furnace, and
Uptake flue described in Jing drains into waste heat boiler from the smelting furnace, to carry out waste heat recovery.
2. ferrum smelting process is floated in rotation according to claim 1, it is characterised in that convey the mixed material to the nozzle
Process also include following operation：
The mixed material is sent in the nozzle using conveying pipeline, and is entered in being introduced into the fluidisation dispenser of the nozzle
Row fluidisation, then enters back in the material channel.
3. ferrum smelting process is floated in rotation according to claim 1, it is characterised in that spraying into the same of the solid reductant
When, also oxygen-enriched air is sprayed into in the sedimentation tank.
4. ferrum smelting process is floated in rotation according to claim 1, it is characterised in that further comprising the steps of：
The high-temperature gas is made to be back to after waste heat recovery and dust removal process in the nozzle, with mixed with the reacting gas
Close.
5. ferrum smelting process is floated in rotation according to claim 1, it is characterised in that be mixed with an oxidation in the reacting gas
Carbon gas.
6. ferrum smelting process is floated in rotation according to claim 1, it is characterised in that the flux is limestone particle, described
During solid reductant is coal dust or coke, and the Iron Ore Powder, the flux and the solid reductant, water content is little
In 0.5%.
7. ferrum smelting process is floated in rotation according to claim 1, it is characterised in that the eddy flow enters the rotation of the smelting furnace
Turn of tidal stream speed is 220m/s～300m/s.
8. the floating ferrum smelting process of rotation according to any one in claim 1-7, it is characterised in that the auxiliary gas leads to
It is 100Nm that road sprays into the flow of the reacting gas3/ h～1000Nm3/ h, the auxiliary fuel path spray into the flow of fuel and are
0Nm3/ h～500Nm3/h。
9. ferrum smelting device is floated in a kind of rotation, including conveying pipeline, smelting furnace, and the spray for connecting the conveying pipeline and the smelting furnace
Mouth, it is characterised in that float ferrum smelting process suitable for the rotation as described in any one claim 1-8, wherein：
The nozzle includes：The rotational flow gas passage of water conservancy diversion reacting gas, is provided with the air inlet of the rotational flow gas passage
Cyclone；The venturi passage being arranged in the rotational flow gas passage；It is set in the outside of the rotational flow gas passage, and with
The material channel of the conveying pipeline connection；The auxiliary oxygen passage being arranged in the rotational flow gas passage；It is set in described auxiliary
Help the outside of oxygen channel, and the auxiliary fuel path in the rotational flow gas passage；
The smelting furnace includes：It is opened on the body of heater of the smelting furnace, it is solid for spraying in the sedimentation tank to the smelting furnace
The reducing agent entrance of body reducing agent；It is opened on the body of heater of the smelting furnace, for spraying in the sedimentation tank to the smelting furnace
The air intake of oxygen-enriched air；It is opened on the body of heater of the smelting furnace, can derives respectively detached in the sedimentation tank
Multiple product outlets of different solid products.
10. ferrum smelting device is floated in rotation according to claim 9, it is characterised in that the minimum diameter of the venturi passage
D, the internal diameter D of no more than described rotational flow gas passage, and it is more than D/2.
Ferrum smelting device is floated in 11. rotations according to claim 9, it is characterised in that the cyclone is by perpendicular to described
The air inlet pipe of rotational flow gas passage, is connected to be formed with the rotational flow gas passage, and the air inlet pipe and the rotational flow gas
Channel connection forms gas access, and the gas access is included near the contraction mouth of the air inlet pipe and near the rotational flow gas
The tangential mouth of passage.
Ferrum smelting device is floated in 12. rotations according to claim 9, it is characterised in that the material channel and the conveying pipeline
The position of connection is provided with fluidisation dispenser, and the conveying pipeline is obliquely installed relative to the material channel, the conveying
Pipe angle of inclination with respect to the horizontal plane is 10 degree～40 degree.
The floating ferrum smelting device of 13. rotations according to claim 9, it is characterised in that also including being set in the auxiliary fuel
On the outer wall of passage, and the cone governor that can be moved along the axial reciprocating of the auxiliary fuel path, and it is arranged on the rotation
On the outside of the roof of stream gas passage, the controller of the cone governor movement is controlled.
Ferrum smelting device is floated in 14. rotations according to claim 9, it is characterised in that the rotational flow gas passage, the literary mound
In passage, the material channel, the auxiliary oxygen passage and the auxiliary fuel path be coaxially disposed, and cyclone gas
The roof of body passage is curved wall.
The floating ferrum smelting device of 15. rotations according to any one in claim 9-14, it is characterised in that the auxiliary fuel
Passage, the gas outlet of the auxiliary oxygen passage is concordant with the gas outlet of the rotational flow gas passage arranges.
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| CN201610950047.3A CN106521068B (en) | 2016-11-02 | 2016-11-02 | It is a kind of to revolve floating iron smelting process and revolve floating iron smelting device |
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| CN201610950047.3A CN106521068B (en) | 2016-11-02 | 2016-11-02 | It is a kind of to revolve floating iron smelting process and revolve floating iron smelting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107881275A (en) * | 2017-11-08 | 2018-04-06 | 李淼 | The method and its iron-smelting furnace of novel flash fast thawing ironmaking |
| CN115178071A (en) * | 2022-07-25 | 2022-10-14 | 北京铝能清新环境技术有限公司 | Anti-sticking wall semi-dry desulfurization absorption tower |
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|---|---|---|---|---|
| CN101705369A (en) * | 2009-11-26 | 2010-05-12 | 阳谷祥光铜业有限公司 | Process and device for smelting copper by pulsation vortex method |
| CN103993115A (en) * | 2014-04-22 | 2014-08-20 | 邱江波 | Drying and reducing integrated flash ironmaking apparatus and ironmaking method |
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2016
- 2016-11-02 CN CN201610950047.3A patent/CN106521068B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705369A (en) * | 2009-11-26 | 2010-05-12 | 阳谷祥光铜业有限公司 | Process and device for smelting copper by pulsation vortex method |
| CN103993115A (en) * | 2014-04-22 | 2014-08-20 | 邱江波 | Drying and reducing integrated flash ironmaking apparatus and ironmaking method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107881275A (en) * | 2017-11-08 | 2018-04-06 | 李淼 | The method and its iron-smelting furnace of novel flash fast thawing ironmaking |
| CN107881275B (en) * | 2017-11-08 | 2019-05-10 | 李淼 | The method and its iron-smelting furnace of flash smelting iron |
| CN115178071A (en) * | 2022-07-25 | 2022-10-14 | 北京铝能清新环境技术有限公司 | Anti-sticking wall semi-dry desulfurization absorption tower |
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| CN106521068B (en) | 2019-02-22 |
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