CN106854684B - One kind being used for iron ore magnetizing roast tunnel oven and iron ore magnetizing roast method - Google Patents
One kind being used for iron ore magnetizing roast tunnel oven and iron ore magnetizing roast method Download PDFInfo
- Publication number
- CN106854684B CN106854684B CN201611229558.2A CN201611229558A CN106854684B CN 106854684 B CN106854684 B CN 106854684B CN 201611229558 A CN201611229558 A CN 201611229558A CN 106854684 B CN106854684 B CN 106854684B
- Authority
- CN
- China
- Prior art keywords
- iron ore
- tunnel oven
- flue gas
- kiln
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
- F27B2009/124—Cooling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The object of the present invention is to provide a kind of iron ore magnetizing roast tunnel oven and iron ore magnetizing roast method, to solve the problem of that fuel availability existing in the prior art is lower, high-temperature flue gas is expelled directly out waste of energy and pollutes air.Tunnel oven of the invention includes drying and preheating section, high temperature calcination section, flue gas cooling section, atomization water cooling section and the external dedusting blowdown apparatus being arranged；Method of roasting of the invention includes mixed material preparation, the roasting of kiln car cloth, material, high-temperature residual heat recycles and cooling, adjusting air mass flow, cooled flue gas, improvement wet flue gas and discharge.Multiple job steps are arranged in the present invention, have each served as the cooling buffering of high-temperature material, the pollution of improvement wet flue gas, have improved roasting yield, reduce the effect be burnt into this, reduce energy consumption.
Description
Technical field
The invention belongs to mineral and metallurgical technology fields, and in particular to one kind is used for iron ore magnetizing roast tunnel oven and iron
Ore magnetizing roast method.
Background technique
Currently, traditional tunnel kiln direct reduced technique of iron ore is by iron ore concentrate, coal dust, agstone according to certain ratio
Example and loading method are respectively charged into reductive jar, and then tank is placed on tank car and is pushed into bar shaped tunnel oven, or tank is directly put
Into annular annular kiln, batch can obtains direct reduced iron after 1150 DEG C or so heating roast and is cooling.Iron ore coal base tunnel oven
Direct-reduction technique has the characteristics that technology maturation, easy to operate, but there is single machines in iron ore is tunnel kiln direct reduced
The problems such as production capacity is small, energy consumption is high, environmental pollution is serious.
It is in balance tunnel kiln along the furnace pressure of kiln length direction point in the current tunnel kiln direct reduced technique of iron ore
Cloth reduces positive pressure in kiln and burns with anger and negative-pressure air-suction phenomenon, be all made of the method discharged fume from tunnel oven both ends, since pit coal is mixed
Coal in conjunction object is at a lower temperature（300-500℃）Fugitive constituent precipitation is just had, tunnel oven is caused to enter the cigarette of kiln end discharge
Contain certain coal fugitive constituent combustibles in gas, these coal fugitive constituent combustibles cannot burn at a lower temperature, directly
It is discharged into atmosphere and had both caused environmental pollution, energy waste.
During iron ore tunnel oven magnetizing roast, the tunnel oven heating normally gaseous fuel of fuel used works as tunnel
Road kiln carries out limiting iron ore tunnel in use, since coal gas supply problem is relatively difficult to resolve certainly in the area that gaseous fuel lacks
The popularization and application of kiln magnetizing roast.But when tunnel oven uses producer gas as fuel, auxiliary construction coal gas is needed to occur
Furnace.The method migration that coal passes through Pintsch process and gasification is producer gas, occurred by gas generator using coal as raw material
Producer gas resupplies tunnel oven and is utilized, and causes coal resources utilization rate not high, and unit roasted ore energy consumption is higher, also limits
The popularization and application of iron ore tunnel oven magnetizing roast.
The high-temperature heat accumulation technology that smelter generally uses, is applied particularly to the Thermal Equipments such as heater for rolling steel, batch-type furnace
In.Integration ofTechnology space gas preheating, flue gas emission function, can recycle the obvious heat of smoke of stove to the maximum extent, reduce
Energy consumption improves material heating quality, has many advantages, such as fume afterheat high efficiente callback, air high temperature preheating, low pollution emission.But
There are no the applicable cases of regenerative combustion technology during iron ore is tunnel kiln direct reduced.
Summary of the invention
The object of the present invention is to provide a kind of iron ore magnetizing roast tunnel ovens, to solve fuel existing in the prior art
Utilization rate is lower, high-temperature flue gas is expelled directly out, waste of energy and the problem of pollute air.
Another object of the present invention is to provide for a kind of iron ore magnetizing roast method.
To solve the above-mentioned problems, the present invention uses following technical scheme：
One kind being used for iron ore magnetizing roast tunnel oven, enters kiln including tunnel oven ontology and set on tunnel oven body exterior
Smoke extractor, heat regenerator and atomization water-cooling apparatus, tunnel oven ontology is held to be divided into drying and preheating section, high-temperature roasting
Section, flue gas cooling section, atomization water cooling section, are additionally provided with dedusting blowdown apparatus in the outside of tunnel oven；Drying and preheating section include into
Kiln end smoke extractor and it is arranged in into the branch pipe at the smoke outlet of kiln end；High temperature calcination section includes smoke outlet, heat regenerator, dedusting
Device, high-temperature roasting smoke extractor and the first chimney, the high-temperature flue gas import of heat regenerator and the smoke evacuation being set at the top of tunnel oven
Mouth connection, the exhanst gas outlet of heat regenerator are connected with the arrival end of deduster, and high-temperature roasting is arranged in the outlet end of deduster
The outlet end of smoke extractor, high-temperature roasting smoke extractor is equipped with the first chimney；The flue gas pipeline of flue gas cooling section and enter kiln end smoke extractor
It is connected；Dedusting blowdown apparatus includes the wet flue gas smoke outlet at the top of the tunnel oven, wet flue gas smoke outlet by smoke exhaust pipe with it is wet
Method deduster is connected, and the bottom of hydrofilter is equipped with drainpipe and is connected with air cooling compressor, under the water outlet of air cooling compressor
Side's setting detention tank, detention tank side wall are equipped with water outlet and are connected to cooling pond, and settlement of sewage bottom of pond portion is equipped with blowdown
Mouthful, the smoke outlet of hydrofilter is connect with dedusting smoke extractor, and the outlet of dedusting smoke extractor is equipped with the second chimney, hydrofilter
Nozzle be connected with water pump by pipeline, the water inlet of water pump is connected with cooling pond, the bottom setting hot-tub of cooling pond.
In order to further realize the present invention, tunnel oven is equipped with kiln top between flue gas cooling device and atomization water-cooling apparatus
Screw-down structure.
In order to further realize the present invention, deduster is vibratory string fence wet dust separator.
In order to further realize the present invention, cooling pond side wall is equipped with water filling port.
In order to further realize the present invention, the bottom of hot-tub is equipped with discharge outlet.
In order to further realize the present invention, tunnel oven is at least arranged one section.
A kind of iron ore magnetizing roast method, it is characterised in that this approach includes the following steps：
A, before kiln car enters tunnel oven, by iron ore concentrate or iron ore after pelletizing or grading, with going back for same particle sizes
The mixing of raw coal charcoal, mixed material are successively laid on kiln car from the bottom up according to the ascending sequence of granularity, finally
In one layer of capping coal of material upper surface tiling；
B, when iron ore roasting, the discharge capacity adjusted into kiln end smoke extractor and high-temperature roasting smoke extractor makes the cigarette being discharged into kiln end
Tolerance is reduced to 15-19%, the exhaust gas volumn of high temperature calcination section discharge is increased to 81-85%；
C, the waste heat of the high-temperature flue gas of heat regenerator recycling high temperature calcination section discharge, makes into heat regenerator
Combustion air is preheated to 900-1000 DEG C, and combustion air enters hot wind infeed channel by hot wind pipeline and enters tunnel oven height
In warm furnace zone, the flue-gas temperature of heat regenerator discharge is down to 200 DEG C or less；
D, the flow that combustion air is controlled by flow control valve, makes combustion air form flow perturbation in kiln, improves
The uniformity of kiln temperature；
E, to iron ore roasting 30-60min, the magnetization of iron ore is completed；
F, will enter the flue gas in the smoke extractor of kiln end makes high temperature substrate through heat exchange by flue gas pipeline feeding flue gas cooling section
The temperature of material and basin material is down to 400-500 DEG C；
G, vapor is extracted by wet flue gas smoke outlet, is decomposed into flue gas, sewage and distilled water through hydrofilter, respectively
Discharge.
In order to further realize the present invention, the material thickness in step A is 60-90mm.
In order to further realize the present invention, capping coal is carbon residue or semi-coke in step A.
The present invention has the advantages that compared with prior art：
1, the flue gas for entering the extraction of kiln end smoke extractor is sent into tunnel kiln smoke-gas cooling section by the present invention, on the one hand for cooling high
Warm material avoids high-temperature material and is directly entered kiln car refractory material rapid heat cycle shadow caused by atomization water cooling section reinforcing cooling
The problem of ringing service life；On the other hand after so that the volatile ingredient in the reducing agent coal of kiln hood side is extracted into the preheating of flue gas cooling section,
In high temperature calcination section completely burned, the qualified discharge of flue gas was both realized, had been good for the environment, and fuel consumption can be reduced.
2, the fugitive constituent released using coal in bed of material chats coal mixtures and the CO generated during magnetizing roast2、H2O
The metallurgical gases that gasification reaction generates occur when across capping carbon（CO,H2）As heating fuel, the burning of this metallurgical gases
Provided heat can satisfy the heat demand of the entire roasting reduction process of pit coal mixed material, so that tunnel oven is reached self-heating flat
Weighing apparatus does not need special outer for fuel heating.
3, it is realized to tunnel oven high temperature calcination section using flow control valve along the adjustment of tunnel oven length direction Temperature Distribution.
During kiln car is pushed into high temperature calcination section from feed end, due to the effect of the high temperature combustion supporting air blasted, pit coal mixing
Object is gradually heated, and the fugitive constituent in coal is released, the H in coal fugitive constituent2It will be used as reducing agent when passing through the bed of material, restore the bed of material
In ferriferous oxide；Hydrocarbon in coal fugitive constituent includes the chemical industry such as methane, benzene, naphthalene product after the bed of material is discharged, and is encountered
High temperature combustion supporting air is used as fuel combustion in kiln.With gradually rising for kiln temperature, reduction reaction occurs for pit coal mixture,
CO is generated in the bed of material2、H2The gases such as O, CO2、H2Carbon in the gases such as O and the bed of material（Containing the capping coal above the bed of material）Occur
Gasification reaction generates H2, CO gas, which escapes into inside most of bed of material as reduction of iron ore agent
It is used as fuel combustion in kiln, meets the heat demand of tunnel oven magnetizing roast whole.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Appended drawing reference meaning of the present invention is as follows：1, tunnel oven ontology；2, drying and preheating section；3, high temperature calcination section；4, flue gas
Cooling section；5, it is atomized water cooling section；6, dedusting blowdown apparatus；7, enter kiln end smoke extractor；8, branch pipe；9, smoke outlet；10, heat accumulating type
Heat exchanger；11, deduster；12, high-temperature roasting smoke extractor；13, the first chimney；14, high-temperature flue gas import；15, exhanst gas outlet；
16, flue gas pipeline；17, wet flue gas smoke outlet；18, smoke exhaust pipe；19, hydrofilter；20, detention tank；21, drainpipe；
23, water outlet；24, cooling pond；25, sewage draining exit；26, smoke outlet；27, dedusting smoke extractor；28, the second chimney；29, water filling port；
30, water pump；31, air cooling compressor；33, hot-tub；34, kiln presses flowering structure；35, discharge outlet；36, hot wind pipeline；37, hot wind
Feed channel.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
One kind being used for iron ore magnetizing roast tunnel oven, enters kiln including tunnel oven ontology and set on tunnel oven body exterior
Smoke extractor, heat regenerator and atomization water-cooling apparatus, tunnel oven ontology 1 is held to be divided into drying and preheating section 2, high-temperature roasting
Section 3, flue gas cooling section 4, atomization water cooling section 5, are additionally provided with dedusting blowdown apparatus 6 in the outside of tunnel oven, tunnel oven is at least set
Set one section；Drying and preheating section 2 includes into kiln end smoke extractor 7 and being arranged in into the branch pipe 8 at the smoke outlet of kiln end；High temperature calcination section 3
Including smoke outlet 9, heat regenerator 10, deduster 11, high-temperature roasting smoke extractor 12 and the first chimney 13, heat regenerator
10 high-temperature flue gas import 14 be set to tunnel oven at the top of smoke outlet 9 connect, the exhanst gas outlet 15 of heat regenerator 10 and
The arrival end of deduster 11 is connected, and high-temperature roasting smoke extractor 12 is arranged in the outlet end of deduster 11, high-temperature roasting smoke extractor 12
Outlet end is equipped with the first chimney 13；The flue gas pipeline 16 of flue gas cooling section 4 is connected with kiln end smoke extractor 7 is entered, and tunnel oven is in flue gas
Kiln, which is equipped with, between cooling section 4 and atomization water cooling section 5 presses flowering structure 34；Dedusting blowdown apparatus 6 includes being set at the top of tunnel oven
Wet flue gas smoke outlet 17, wet flue gas smoke outlet 17 is connected by smoke exhaust pipe 18 with hydrofilter 19, and hydrofilter 19 is
Vibratory string fence wet dust separator, the bottom of hydrofilter 19 are equipped with drainpipe 21 and are connected with air cooling compressor 31, air cooling compressor
Water outlet 23 below be arranged detention tank 20,20 side wall of detention tank be equipped with water outlet 23 be connected to cooling pond 24, dirt
20 bottom of water sedimentation pond is equipped with sewage draining exit 25, and the smoke outlet 26 of hydrofilter 19 is connect with dedusting smoke extractor 27, and dedusting is smoked
The outlet of machine 27 is equipped with the second chimney 28, and the nozzle of hydrofilter 19 is connected by pipeline with water pump 30, the water inlet of water pump 30
Mouth is connected with cooling pond 24, and 24 side wall of cooling pond is equipped with water filling port 29, and hot-tub 33, hot-tub is arranged in the bottom of cooling pond 24
33 bottom is equipped with discharge outlet 35.
A kind of iron ore magnetizing roast method, this approach includes the following steps：
A, before kiln car enters tunnel oven, by iron ore concentrate or iron ore after pelletizing or grading, with going back for same particle sizes
The mixing of raw coal charcoal, mixed material are successively laid on kiln car from the bottom up according to the ascending sequence of granularity, material
With a thickness of 60-90mm, finally in one layer of capping coal of material upper surface tiling, capping coal is carbon residue or semi-coke；
B, when iron ore roasting, the discharge capacity adjusted into kiln end smoke extractor 7 and high-temperature roasting smoke extractor 12 makes to be discharged into kiln end
Exhaust gas volumn be reduced to 15-19%, high temperature calcination section 3 be discharged exhaust gas volumn be increased to 81-85%；
C, heat regenerator 10 recycles the waste heat for the high-temperature flue gas that high temperature calcination section 3 is discharged, and makes to enter regenerative heat-exchange
The combustion air of device 10 is preheated to 900-1000 DEG C, and combustion air enters hot wind by hot wind pipeline 36 and feeds the entrance of channel 37
Into tunnel oven high temperature calcination section 3, the flue-gas temperature that heat regenerator 10 is discharged is down to 200 DEG C or less；
D, the flow that combustion air is controlled by flow control valve, makes combustion air form flow perturbation in kiln, improves
The uniformity of kiln temperature；
E, to iron ore roasting 30-60min, the magnetization of iron ore is completed；
F, will enter the flue gas in kiln end smoke extractor 7 makes height through heat exchange by the feeding flue gas cooling section 4 of flue gas pipeline 16
The temperature of warm material and basin material is down to 400-500 DEG C；
G, vapor is extracted by wet flue gas smoke outlet 17, is decomposed into flue gas, sewage and distilled water through hydrofilter 19,
It discharges respectively.
When operation, iron ore uses granularity for the oxide ore of 0-1mm, 1-5mm, 5-15mm, and reducing agent uses and iron ore
Coal is enclosed using 0-5mm coal in the identical coal of particle size range, bottom, and capping coal uses the lower 5-15mm carbon residue of volatile matter or orchid
Charcoal, coke.
1, prepared by mixed material
0-1mm, 1-5mm, 5-15mm iron ore are pressed 100 with 0-1mm, 1-5mm, 5-15mm reduction coal respectively:1-3 ratio
After example carries out ingredient and mixing, each grade mixed material is made.
2, kiln car cloth
After laying depth 10-15mm encloses coal in bottom on kiln car, by each grade mixed material according to granularity by it is small to
The sequence reached is successively laid on kiln car from lower to upper, and being laid with overall thickness control is 60-90mm, is finally put down on mixed material
Spread a layer thickness 10-20mm, granularity 5-15mm capping coal.
3, tunnel oven material roasts
Kiln car equipped with material enters from tunnel oven feeding end, kiln car in tunnel oven in moving process, material gradually by
Heating and roasting can make iron by 1000-1100 DEG C of tunnel oven high-temperature roasting temperature of control, high-temperature roasting time 60min or so
Ore is magnetized.
Iron ore is in tunnel oven in roasting process, the gas that fugitive constituent and the charcoal gasification released in coal generate, and one
Point gas is utilized as reduction of iron ore gas, another part gas entered from material kiln space as fuel into
Row utilizes.
In tunnel oven furnace zone, high-temperature hot-air a part of feeding is fed from kiln car lower part, to kiln car lower part into
Kiln car top is flow to again after row heating to be utilized as combustion air；After another part high-temperature hot-air is fed from kiln car top
It mixes with kiln gas and is utilized as combustion air.
4, the waste heat recycling of tunnel kiln smoke-gas
The flue gas being discharged from tunnel oven high temperature calcination section 3 is sent to progress waste heat recycling in heat regenerator 10, cools to
200 DEG C or so of flue gas is discharged into atmosphere by high-temperature roasting smoke extractor 12 after 11 dedusting of deduster, is warming up to 800-1000 DEG C
High-temperature hot-air is sent to tunnel oven high temperature calcination section 3 and is utilized.
5, the cooling of tunnel oven roasting material
High-temperature material after tunnel oven roasting is introduced into from high temperature calcination section 3 to flue gas cooling section 4, in flue gas cooling section 4,
Extract 200-250 DEG C of flue gas out by entering kiln end smoke extractor 7, after being sent into tunnel kiln smoke-gas cooling section 4, with high-temperature material, feed basin into
Row heat exchange makes feed basin surface and truck other heating surface temperature be down to 400-500 DEG C；Subsequently into atomization water cooling section 5, object
Expect to carry out heat exchange with the atomized water entered from kiln top spray in atomization water cooling section 5, material can be made cooling within the 15-30min time
To 400 DEG C hereinafter, the water vapour after atomized water vaporization is discharged from atomization 5 end of water cooling section, 400 DEG C of materials below are cooled to
It is discharged from tunnel oven cooling section.It avoids high-temperature material and is directly entered kiln car fire proofed wood caused by atomization water cooling section reinforcing cooling
Expect the problem of rapid heat cycle influences service life.
Claims (9)
1. one kind is used for iron ore magnetizing roast tunnel oven, enter kiln end including tunnel oven ontology and set on tunnel oven body exterior
Smoke extractor, heat regenerator and atomization water-cooling apparatus, it is characterised in that：Tunnel oven ontology（1）It is divided into drying and preheating
Section（2）, high temperature calcination section（3）, flue gas cooling section（4）, atomization water cooling section（5）, dedusting row is additionally provided in the outside of tunnel oven
Dirty device（6）；The drying and preheating section（2）Including entering kiln end smoke extractor（7）Be arranged in into the branch pipe at the smoke outlet of kiln end
（8）；High temperature calcination section（3）Including smoke outlet（9）, heat regenerator（10）, deduster（11）, high-temperature roasting smoke extractor（12）
With the first chimney（13）, heat regenerator（10）High-temperature flue gas import（14）With the smoke outlet being set at the top of tunnel oven（9）
Connection, heat regenerator（10）Exhanst gas outlet（15）With deduster（11）Arrival end be connected, deduster（11）Outlet
End setting high-temperature roasting smoke extractor（12）, high-temperature roasting smoke extractor（12）Outlet end be equipped with the first chimney（13）；Flue gas is cooling
Section（4）Flue gas pipeline（16）With enter kiln end smoke extractor（7）It is connected；Dedusting blowdown apparatus（6）Including being set at the top of tunnel oven
Wet flue gas smoke outlet（17）, wet flue gas smoke outlet（17）Pass through smoke exhaust pipe（18）With hydrofilter（19）It is connected, wet dedusting
Device（19）Bottom be equipped with drainpipe（21）With air cooling compressor（31）It is connected, the water outlet of air cooling compressor（23）Lower section setting
Detention tank（20）, detention tank（20）Side wall is equipped with water outlet（23）With cooling pond（24）Connection, detention tank
（20）Bottom is equipped with sewage draining exit（25）, hydrofilter（19）Smoke outlet（26）With dedusting smoke extractor（27）Connection, dedusting are taken out
Smoke machine（27）Outlet be equipped with the second chimney（28）, hydrofilter（19）Nozzle pass through pipeline and water pump（30）It is connected, water
Pump（30）Water inlet and cooling pond（24）It is connected, cooling pond（24）Bottom be arranged hot-tub（33）.
2. according to claim 1 be used for iron ore magnetizing roast tunnel oven, it is characterised in that：The tunnel oven is in flue gas
Cooling section（4）With atomization water cooling section（5）Between be equipped with kiln press flowering structure（34）.
3. according to claim 2 be used for iron ore magnetizing roast tunnel oven, it is characterised in that：The hydrofilter
（19）For vibratory string fence wet dust separator.
4. according to claim 3 be used for iron ore magnetizing roast tunnel oven, it is characterised in that：The cooling pond（24）Side
Wall is equipped with water filling port（29）.
5. according to claim 4 be used for iron ore magnetizing roast tunnel oven, it is characterised in that：The hot-tub（33）'s
Bottom is equipped with discharge outlet（35）.
6. according to claim 5 be used for iron ore magnetizing roast tunnel oven, it is characterised in that：The tunnel oven is at least set
Set one section.
7. a kind of iron ore magnetizing roast method using iron ore magnetizing roast tunnel oven described in claim 1, feature exist
In this approach includes the following steps：
A, before kiln car enters tunnel oven, by the reduction coal of iron ore concentrate or iron ore after pelletizing or grading, with same particle sizes
Charcoal mixing, mixed material is successively laid on kiln car from the bottom up according to the ascending sequence of granularity, finally in object
Expect one layer of capping coal of upper surface tiling；
B, it when iron ore roasting, adjusts into kiln end smoke extractor（7）With high-temperature roasting smoke extractor（12）Discharge capacity make into kiln end be discharged
Exhaust gas volumn be reduced to 15-19%, high temperature calcination section（3）The exhaust gas volumn of discharge is increased to 81-85%；
C, heat regenerator（10）Recycle high temperature calcination section（3）The waste heat of the high-temperature flue gas of discharge makes to enter regenerative heat-exchange
Device（10）Combustion air be preheated to 900-1000 DEG C, combustion air passes through hot wind pipeline（36）Channel is fed into hot wind
（37）Enter tunnel oven high temperature calcination section（3）It is interior, heat regenerator（10）The flue-gas temperature of discharge is down to 200 DEG C or less；
D, the flow that combustion air is controlled by flow control valve makes combustion air form flow perturbation in kiln, improves in kiln
The uniformity of temperature；
E, to iron ore roasting 30-60min, the magnetization of iron ore is completed；
F, kiln end smoke extractor will be entered（7）Interior flue gas passes through flue gas pipeline（16）It is sent into flue gas cooling section（4）, through heat exchange, make
The temperature of high-temperature material and basin material is down to 400-500 DEG C；
G, pass through wet flue gas smoke outlet（17）Vapor is extracted, through hydrofilter（19）It is decomposed into flue gas, sewage and distilled water,
It discharges respectively.
8. iron ore magnetizing roast method according to claim 7, it is characterised in that：Material described in the step A is thick
Degree is 60-90mm.
9. iron ore magnetizing roast method according to claim 7, it is characterised in that：Capping coal is in the step A
Carbon residue or semi-coke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611229558.2A CN106854684B (en) | 2016-12-27 | 2016-12-27 | One kind being used for iron ore magnetizing roast tunnel oven and iron ore magnetizing roast method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611229558.2A CN106854684B (en) | 2016-12-27 | 2016-12-27 | One kind being used for iron ore magnetizing roast tunnel oven and iron ore magnetizing roast method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106854684A CN106854684A (en) | 2017-06-16 |
| CN106854684B true CN106854684B (en) | 2018-11-23 |
Family
ID=59127059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611229558.2A Active CN106854684B (en) | 2016-12-27 | 2016-12-27 | One kind being used for iron ore magnetizing roast tunnel oven and iron ore magnetizing roast method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106854684B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317865B (en) * | 2018-04-11 | 2023-12-22 | 北京艾瑞机械有限公司 | High-temperature material waste heat recovery station system and recovery method |
| CN108588408B (en) * | 2018-06-15 | 2023-09-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Device and process for producing metallized pellets by using iron oxide red tunnel kiln |
| CN109758882A (en) * | 2019-03-04 | 2019-05-17 | 张君宇 | A kind of tunnel oven discharged gas fume reheating takes off white system and treatment process |
| CN110425870A (en) * | 2019-08-30 | 2019-11-08 | 贵州遵义金山磨料有限公司 | A kind of bauxite Brown Alundum calcining-desiliconization integration tunnel oven |
| CN113218180A (en) * | 2021-04-13 | 2021-08-06 | 黄炜 | Method and device for firing mineral powder |
| CN113624003B (en) * | 2021-07-19 | 2024-10-15 | 酒泉钢铁(集团)有限责任公司 | Heat accumulating type tunnel kiln for smoke reflux and high-temperature section smoke exhaust and roasting process |
| CN116592628A (en) * | 2023-07-03 | 2023-08-15 | 河北耀一节能设备制造有限责任公司 | Ultra-low emission tunnel kiln |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329945A (en) * | 2014-10-22 | 2015-02-04 | 天津水泥工业设计研究院有限公司 | Iron ore magnetic roasted ore waste heat recovery process and iron ore magnetic roasted ore waste heat recovery equipment |
| CN104831055A (en) * | 2015-04-17 | 2015-08-12 | 沈阳鑫博工业技术股份有限公司 | Device and method used for realizing powdery iron mineral magnetization treatment and generating steam |
| CN204787783U (en) * | 2015-06-25 | 2015-11-18 | 湖北铸邦环保科技材料有限公司 | Tunnel cave kiln tail refrigeration cycle device |
| CN105091576A (en) * | 2015-09-11 | 2015-11-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Magnetizing roasting self-heating balancing device and method for iron ore tunnel kiln |
| CN204923925U (en) * | 2015-09-14 | 2015-12-30 | 上海泰豪智能节能技术有限公司 | Tunnel cave heat pipe formula preheating of air and material cooling device |
| CN105274324A (en) * | 2015-09-11 | 2016-01-27 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Iron ore tunnel kiln magnetizing roasting layering material distributing reduction method |
-
2016
- 2016-12-27 CN CN201611229558.2A patent/CN106854684B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329945A (en) * | 2014-10-22 | 2015-02-04 | 天津水泥工业设计研究院有限公司 | Iron ore magnetic roasted ore waste heat recovery process and iron ore magnetic roasted ore waste heat recovery equipment |
| CN104831055A (en) * | 2015-04-17 | 2015-08-12 | 沈阳鑫博工业技术股份有限公司 | Device and method used for realizing powdery iron mineral magnetization treatment and generating steam |
| CN204787783U (en) * | 2015-06-25 | 2015-11-18 | 湖北铸邦环保科技材料有限公司 | Tunnel cave kiln tail refrigeration cycle device |
| CN105091576A (en) * | 2015-09-11 | 2015-11-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Magnetizing roasting self-heating balancing device and method for iron ore tunnel kiln |
| CN105274324A (en) * | 2015-09-11 | 2016-01-27 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Iron ore tunnel kiln magnetizing roasting layering material distributing reduction method |
| CN204923925U (en) * | 2015-09-14 | 2015-12-30 | 上海泰豪智能节能技术有限公司 | Tunnel cave heat pipe formula preheating of air and material cooling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106854684A (en) | 2017-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106854684B (en) | One kind being used for iron ore magnetizing roast tunnel oven and iron ore magnetizing roast method | |
| CN103937921B (en) | The layering cloth method of reducing of a kind of sponge iron tunnel kiln and tunnel furnace thereof | |
| CN101956037B (en) | Method and device for indirect heating type reduction iron making | |
| CN102384664A (en) | Sintering and cooling integrated method for efficiently recovering and utilizing waste heat resources and device thereof | |
| CN102258923A (en) | Method for recycling and reusing tail gas of calcium carbide furnace | |
| CN104762095B (en) | A kind of complete alternation low temperature distillation device and technique for producing semi-coke | |
| CN105274324B (en) | A kind of iron ore tunnel cave magnetizing roast layer-by-layer distribution restoring method | |
| CN105366964A (en) | Lime-coke-calcium carbide production joint apparatus | |
| CN103435276A (en) | Production apparatus of active lime | |
| CN104880083A (en) | Roller kiln waste heat utilizing system | |
| CN104421943A (en) | Environmental friendly disposing technology and system thereof for waste electric motor and other waste containing organic matters | |
| CN107298981A (en) | A kind of 7.3m tops dress makes dual-purpose type coke oven production technology firm by ramming | |
| CN106369996B (en) | A kind of heat accumulating type tunnel oven for iron ore magnetizing roast or direct-reduction | |
| CN105347702B (en) | A kind of rotary kiln device for producing cement | |
| CN204661750U (en) | A kind of partition rotary kiln of ferroelectric burnt combination producing | |
| CN102618684B (en) | Continuous melting reduction iron-making device | |
| CN103205584B (en) | Production device and production method of manganese monoxide mineral powder | |
| CN105502337A (en) | Vehicle type roasting furnace and heat treatment production line comprising same | |
| CN101307372A (en) | Device for manufacturing and reducing crust pellet and production process | |
| CN104496207B (en) | Heat storage type lime rotary kiln | |
| CN102787193B (en) | Coking reduction smelting device | |
| CN210615009U (en) | Waste sand thermal method regeneration equipment | |
| CN112831652A (en) | Carbon-free sintering system adopting high air temperature to provide heat | |
| CN105066703A (en) | Efficient and energy-saving vertical type sintering machine | |
| CN206875993U (en) | A kind of desulphurization system of agglomeration for iron mine flue gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |