CN108660310A - A kind of Iron Ore Powder efficiently preheats prereduction device and technique - Google Patents
A kind of Iron Ore Powder efficiently preheats prereduction device and technique Download PDFInfo
- Publication number
- CN108660310A CN108660310A CN201810763092.7A CN201810763092A CN108660310A CN 108660310 A CN108660310 A CN 108660310A CN 201810763092 A CN201810763092 A CN 201810763092A CN 108660310 A CN108660310 A CN 108660310A
- Authority
- CN
- China
- Prior art keywords
- port
- level
- heat exchange
- iron ore
- pipeline
- 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.)
- Pending
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
-
- 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
- Y02P10/20—Recycling
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A kind of Iron Ore Powder efficiently preheats prereduction device and technique, belongs to technical field of smelting.Including：Fusion reducing furnace, vaporization gas hood, coal gas of high temperature processing system, Iron Ore Powder pre-heating system, raw ore elevator, crude ore bin, pulverized coal preparation injection system, deduster, conditioning Tower, chimney, air-introduced machine, hot mine elevator, hot mine injection system, hot mine batcher, hot mine are blown pipeline.The coal gas of high temperature that fusion reducing furnace generates is after vaporization gas hood and the processing of coal gas of high temperature processing system cooling, purifying, clean coal pneumatic transmission is to Iron Ore Powder pre-heating system and coal dust co-fire, the high-temperature flue gas of generation is carried out at the same time with the reverse and in the same direction heat exchange of the original ore powder that eminence falls, Iron Ore Powder temperature reaches 400~850 DEG C after multistage preheats, it is blown into fusion reducing furnace and is smelted through high temperature feed-line, the heat smoke after heat exchange enters chimney after dedusting.The advantage is that coal gas obtains reuse, floor space is small, and equipment is simple, realizes the efficient preheating prereduction of Iron Ore Powder.
Description
Technical field
The invention belongs to technical field of smelting, more particularly to a kind of Iron Ore Powder efficiently preheats prereduction device and technique, fits
Processing for superfine powder.
Background technology
Currently, in ironmaking technique of fusion and reduction, realize that the preheating method of industrialized Iron Ore Powder is mainly fluid bed
Preheating prereduction and preheating in rotary kiln prereduction, the preheating by Iron Ore Powder and prereduction, ultimate reacting furnace will carry significantly
High reaction rate and the raising thermal efficiency are to propose production synergy to mitigate the maximally efficient approach of ultimate reactor load.
Fluid bed preheat prereduction technology be used on HIsmelt first generation iron-smelting process using recirculating fluidized bed and
Miberal powder, can be preheating to 700 DEG C or more, reaction gas is temperature by the Circoheat fluidizations of annular fluidized bed combination
1000 DEG C of melting furnace coal gas of high temperature, only fluidizes bed prereduction through primary cycle, and system operation is not implemented preset 25% for 3 years also
Former degree and equipment failure rate height.
FINEX ironmaking technologies can handle the Iron Ore Powder that granularity is less than 8mm, using molten using multistage turbulent fluidized-bed process
Melt the high heating value heating gas (7000kJ/m of gasification furnace3Control) preheating prereduction is carried out as reducing agent, this coal gas system pressure
High (4Mpa), system and equipment are complex, to prevent cohering for fluid bed from need to control lower prereduction degree and preheating temperature
Degree.
Using segmentation preheating in rotary kiln technical finesse Iron Ore Powder, heat exchange efficiency is low, preheating temperature is low, is easy to happen and coheres simultaneously
And backward in technique, the quantity of return mines superelevation when iron ore Powder Particle Size is relatively low, it is extremely uneconomic processing mode.
The suspension preheating technology that early 1970s occur because it have that two phase gas-solid distribution is uniform, heat exchange efficiency is high and
The technical characterstic efficiently separated, odd-numbered day can heat ten thousand tons or more raw material, and the control of raw material granularity is in D30 for 80 μm hereinafter, suspending
Heat the easier progress of the thinner warm of raw material granularity under state, the raw material of this technical finesse be generally lime stone, clay and
A small amount of iron powder etc..Using the ultra-fine Iron Ore Powder of suspension preheating technical finesse, because iron ore powder density is big, cyclone cylinder separative efficiency declines and
There are larger differences for powder gas solid transfer diabatic process difference, and this technology is not used on ironmaking technique of fusion and reduction, with work
The connection of skill other systems and material stream, energy stream, the consistent of information flow will all have larger change, the defect of this technology also will
It is transplanted in new process and makes a variation and protrude.
Invention content
The purpose of the present invention is to provide a kind of Iron Ore Powders efficiently to preheat prereduction device and technique, have it is simple for process,
Equipment reliably and the good feature of pre-heat effect, it can be achieved that the especially ultra-fine Iron Ore Powder of Iron Ore Powder use melting and reducing coal gas item
Prereduction is efficiently preheated under part, reaches 800 DEG C or more of preheating temperature, by control reaction atmosphere, Iron Ore Powder available 10~
35% prereduction rate.
The inventive system comprises：Fusion reducing furnace 1, vaporization gas hood 2, coal gas of high temperature processing system 3, Iron Ore Powder preheating system
System 4, raw ore elevator 5, crude ore bin 6, pulverized coal preparation injection system 7, deduster 8, conditioning Tower 9, chimney 10, air-introduced machine 11, heat
Mine elevator 12, hot mine injection system 13, hot mine batcher 14, hot mine are blown pipeline 15.
The port for each parts for including to apparatus of the present invention illustrates, and first end is classified as with a port
Mouthful, tool is first port there are two the wherein left side port of port or upper port, and there are three the wherein port orders of port for tool
To rotate clockwise using the top as first port, there are four be to rotate clockwise with most with the wherein port order of upper port for tool
Upper end is first port.
The first port of fusion reducing furnace 1 is connected to the first port of vaporization gas hood 2；The second port of vaporization gas hood 2 with
The first port of coal gas of high temperature processing system 3 is connected to；The second port of coal gas of high temperature processing system 3 and Iron Ore Powder pre-heating system 4
The 6th port connection；The second port of Iron Ore Powder pre-heating system 4 is connected to the first port of raw ore elevator 5, and Iron Ore Powder is pre-
The of the first port of hot systems 4 and the first port of deduster 8, the first port of conditioning Tower 9 and pulverized coal preparation injection system 7
Two-port netwerk is connected to, and the 4th port of Iron Ore Powder pre-heating system 4 is connected to the second port of hot mine elevator 12, Iron Ore Powder preheating system
The fifth port of system 4 is connected to air-introduced machine 11；The first port of crude ore bin 6 connects miberal powder supplied materials, and the second port of crude ore bin 6 connects
The second port of the second port and conditioning Tower 9 of deduster 8 is connect, the third port of crude ore bin 6 connects the second of raw ore elevator
Port；The first port of pulverized coal preparation injection system 7 connects coal dust supplied materials, the third port and iron of pulverized coal preparation injection system 7
The third port of miberal powder pre-heating system 4 connects；The first port of the first port of hot mine elevator 12 and hot mine injection system 13
It is connected；The second port of hot mine injection system 13 is connected with the second port of hot mine batcher 14；Hot mine batcher 14
First port connects the second port of hot mine injection pipeline 15, and the first port of hot mine injection pipeline 15 is connected to fusion reducing furnace
1 second port.
4 single series of Iron Ore Powder pre-heating system, which further includes, to be further illustrated to the structure of the present invention：Raw ore coming expects pipe 16, one
Grade cyclone cylinder 17, level-one heat exchange pipeline 18, level-one tremie pipe 19, two level cyclone cylinder 20, secondary heat exchange pipeline 21, two level tremie pipe
22, three-level cyclone cylinder 23, three-level heat exchange pipeline 24, three-level tremie pipe 25, heating device 26, level Four heat exchange pipeline 27, level Four rotation
Air duct 28, hot mine tremie pipe 29, breeze blowing pipeline 30, combustion-supporting gas carry out pipe 31, coal gas carrys out pipe 32, exhanst gas outlet pipeline 33.
Wherein, each parts have the first port that is classified as of a port, and there are two the wherein left side ports of port for tool
Or upper port is first port, tool is to rotate clockwise using the top as first end there are three the wherein port order of port
Mouthful, there are four be to rotate clockwise using the top as first port using the wherein port order of upper port for tool.
The first port connection exhanst gas outlet pipeline 33 of one cyclonic cylinder 17, the second port connection one of one cyclonic cylinder 17
The first port of grade heat exchange pipeline 18, the third port connection level-one tremie pipe 19 of one cyclonic cylinder 17；Two level cyclone cylinder 20
First port connects the second port of level-one heat exchange pipeline 18, the second port connection two level tremie pipe 22 of two level cyclone cylinder 20
First port, the third port connection secondary heat exchange pipeline 21 of two level cyclone cylinder 20；The first port of three-level cyclone cylinder 23 connects
Secondary heat exchange pipeline 21, the second port connection three-level heat exchange pipeline 24 of three-level cyclone cylinder 23, the third end of three-level cyclone cylinder 23
Mouth connection three-level tremie pipe 25；The first port connection level Four heat exchange pipeline 27 of heating device 26, the second end of heating device 26
Mouth connection three-level tremie pipe 25, the third port connection breeze blowing pipeline 30 of heating device 26, the 4th end of heating device 26
Mouth connection combustion air carrys out pipe 31, and the fifth port connection coal gas of heating device 26 carrys out pipe 32；The first end of Category Four cyclone cylinder 28
Mouthful connection three-level heat exchange pipeline 24, the second port of Category Four cyclone cylinder 28 connect hot mine tremie pipe 29, and the of Category Four cyclone cylinder 28
Three ports connect level Four heat exchange pipeline.
Wherein, raw ore coming expects pipe 16 is connected on level-one heat exchange pipeline 18, and level-one tremie pipe 19 is connected to secondary heat exchange pipe
On road 24, two level tremie pipe 22 is connected on three-level heat exchange pipeline 24.
Specifically, the preheating classification that Iron Ore Powder pre-heating system 4 is included can be two level, three-level, level Four, Pyatyi or multistage,
Can be simultaneously single series, bi serie or multi-series.
The technology path of the present invention is the coal gas of high temperature of fusion reducing furnace generation through vaporization gas hood and coal gas of high temperature processing system
It unites after cooling, purifying processing, gas temperature is down to 20~80 DEG C, and dustiness is down to 5mg/Nm3Hereinafter, clean coal pneumatic transmission is to Iron Ore Powder
Pre-heating system and coal dust co-fire, the original ore powder that the high-temperature flue gas of generation falls with eminence inversely and in the same direction exchange heat simultaneously into
Row, Iron Ore Powder temperature reaches 400~850 DEG C after multistage preheats, and entering fusion reducing furnace through the injection of high temperature feed-line carries out
It smelts, the heat smoke after heat exchange enters chimney after dedusting.Compared to existing two-stage rotary kiln Iron Ore Powder preheating technology, melting and reducing
Producer gas obtains reuse, and pre-heating system floor space is small, and pre-heating device is simple, realizes the efficient preheating prereduction of Iron Ore Powder.
Iron Ore Powder of the present invention efficiently preheat pre-reduction treatment specific steps and control parameter it is as follows：
1. 1400~1650 DEG C of the coal gas of high temperature come out from fusion reducing furnace 1,750 are cooled to by vaporization gas hood 2~
1100 DEG C, dust content of gas is by 20~100g/Nm3It is down to 20~40g/Nm3；
2. coal gas of high temperature, through coal gas of high temperature processing system 3, coal gas is cooled to 20~80 DEG C, and dust content of gas is down to 5mg/
Nm3Below；
3. purified gas enters the preheating prereduction that Iron Ore Powder pre-heating system 4 participates in Iron Ore Powder；
4. Iron Ore Powder supplied materials enters crude ore bin 6, original ore powder, which is promoted to Iron Ore Powder pre-heating system 4, through raw ore elevator 5 pushes up
Portion；
5. raw coal is prepared as the thermal coal that moisture is less than 2% through pulverized coal preparation injection system 7, injection is pre- to Iron Ore Powder
Hot systems 4；
6. the exhanst gas outlet pipeline 33 of Iron Ore Powder pre-heating system 4 leads to deduster 8 or conditioning Tower 9, dedusting ash is delivered to original
Ore storage bin 6, neat stress are sent to discharge in chimney 10；
7. Iron Ore Powder is after the preheating of Iron Ore Powder pre-heating system 4, temperature reaches 400~850 DEG C, by hot mine feed-line and
Hot mine elevator 12 is promoted to hot mine injection system 13.
8. hot miberal powder is delivered to fusion reducing furnace 1 through hot mine injection pipeline 15 with hot mine batcher 14 and is blown into stove, participate in
Reaction in furnace melting is molten iron.
The work step of Iron Ore Powder pre-heating system is as follows in step 3：
1. original ore powder supplied materials is promoted to raw ore coming expects pipe 16 by raw ore elevator 5, blanking is to level-one heat exchange pipeline 18, in pipe
Heat exchange occurs with the heat smoke for carrying out self-heating apparatus 26 in road, original ore powder enters one cyclonic after level-one heats with heat smoke
Cylinder 17, in cyclonic separation blanking to level-one tremie pipe 19, the heat smoke after heat exchange leaves one cyclonic cylinder 17 and enters exhanst gas outlet
Pipeline 33, heat smoke temperature is less than 300 DEG C at this time；
2. the hot miberal powder blanking in level-one tremie pipe 19 to secondary heat exchange pipeline 21, in pipeline and carrys out self-heating apparatus 26
Heat smoke occur heat exchange, hot miberal powder enters with heat smoke in two level cyclone cylinder 20, through cyclonic separation blanking to two level blanking
In pipe 22, heat smoke leaves two level cyclone cylinder 20 and enters level-one heat exchange pipeline；
3. the hot miberal powder blanking in two level tremie pipe 22 to three-level heat exchange pipeline 24, in pipeline and carrys out self-heating apparatus 26
Heat smoke occur heat exchange, hot miberal powder enters with heat smoke in three-level cyclone cylinder 23, through cyclonic separation blanking to three-level blanking
In pipe 25, heat smoke leaves three-level cyclone cylinder 23 and enters secondary heat exchange pipeline 21；
4. the hot miberal powder in three-level tremie pipe 25 drops down onto in heating device 26, exchanges heat with heat smoke and enter level Four therewith and revolve
Air duct 28；
5. hot miberal powder is through in cyclonic separation blanking to hot mine tremie pipe 29, heat smoke leaves Category Four cyclone cylinder 28 and enters three-level
In heat exchange pipeline 24；
Heat smoke in step 4 in heating device 26 by from breeze blowing pipeline 30 thermal coal, combustion-supporting gas is come pipe
31 combustion air, coal gas come the generation of the gas combustion reaction in pipe 32,1300~1500 DEG C of heat smoke temperature.Work as melting and reducing
Stove during normal production, stablize by gas supply, and heating device 26 can use coal gas, pulverized coal preparation injection system 7 to can be used as out completely
Stove use or spare.
Heating device 26 can get 10~35% prereduction rate by controlling reaction atmosphere, Iron Ore Powder in step 4.
Be reduced pressure atmosphere in one cyclonic cylinder~Category Four cyclone cylinder in step 1~5, pressure limit be in -200Pa~-
Between 1500Pa.
The advantage of the invention is that：
1. Iron Ore Powder pre-heating system is made of multistage preheating unit, Iron Ore Powder can get 10~35% prereduction rate, temperature
Degree reaches 400~850 DEG C, and preheating is efficient, equipment is simple, floor space is small, investment is low, solves existing two-stage rotary kiln and sets
Standby heat transfer efficiency is low, occupation area of equipment is big, cannot preheat the shortcomings that super finely ground slag；
It is used 2. being transported to after a large amount of high temperature coal gas purification of fusion reducing furnace in Iron Ore Powder pre-heating system, the energy is effectively sharp
It is got a promotion with rate, factory's entirety energy consumption declines；
3. the dust recycled in Iron Ore Powder pre-heating system flue gas is delivered to crude ore bin, the recycling of dedusting ash is simply realized
It utilizes；
4. by controlling Iron Ore Powder pre-heating system exit gas temperature, heat smoke heat, system thermal efficiency are effectively utilized
It is high.
Description of the drawings
Fig. 1 is that a kind of Iron Ore Powder provided by the invention efficiently preheats prereduction process flow diagram.Wherein, melting and reducing
Stove 1, vaporization gas hood 2, coal gas of high temperature processing system 3, Iron Ore Powder pre-heating system 4, raw ore elevator 5, crude ore bin 6, pulverized coal preparation
Injection system 7, deduster 8, conditioning Tower 9, chimney 10, air-introduced machine 11, hot mine elevator 12, hot mine injection system 13, hot mine are given
Material machine 14, hot mine are blown pipeline 15.
Fig. 2 is Iron Ore Powder pre-heating system flow diagram.Wherein, raw ore coming expects pipe 16, one cyclonic cylinder 17, level-one heat exchange
Pipeline 18, level-one tremie pipe 19, two level cyclone cylinder 20, secondary heat exchange pipeline 21, two level tremie pipe 22, three-level cyclone cylinder 23, three
Grade heat exchange pipeline 24, three-level tremie pipe 25, heating device 26, level Four heat exchange pipeline 27, Category Four cyclone cylinder 28, hot mine tremie pipe
29, breeze blowing pipeline 30, combustion-supporting gas carrys out pipe 31, and coal gas comes pipe 32, exhanst gas outlet pipeline 33.
Specific implementation mode
The present invention includes：Fusion reducing furnace 1, vaporization gas hood 2, coal gas of high temperature processing system 3, Iron Ore Powder pre-heating system 4 are former
Mine elevator 5, crude ore bin 6, pulverized coal preparation injection system 7, deduster 8, conditioning Tower 9, chimney 10, air-introduced machine 11, hot mine are promoted
Machine 12, hot mine injection system 13, hot mine batcher 14, hot mine are blown pipeline 15.
The port for each parts for including to apparatus of the present invention illustrates, and first end is classified as with a port
Mouthful, tool is first port there are two the wherein left side port of port or upper port, and there are three the wherein port orders of port for tool
To rotate clockwise using the top as first port, there are four be to rotate clockwise with most with the wherein port order of upper port for tool
Upper end is first port.
The first port of fusion reducing furnace 1 is connected to the first port of vaporization gas hood 2；The second port of vaporization gas hood 2 with
The first port of coal gas of high temperature processing system 3 is connected to；The second port of coal gas of high temperature processing system 3 and Iron Ore Powder pre-heating system 4
The 6th port connection；The second port of Iron Ore Powder pre-heating system 4 is connected to the first port of raw ore elevator 5, and Iron Ore Powder is pre-
The of the first port of hot systems 4 and the first port of deduster 8, the first port of conditioning Tower 9 and pulverized coal preparation injection system 7
Two-port netwerk is connected to, and the 4th port of Iron Ore Powder pre-heating system 4 is connected to the second port of hot mine elevator 12, Iron Ore Powder preheating system
The fifth port of system 4 is connected to air-introduced machine 11；The first port of crude ore bin 6 connects miberal powder supplied materials, and the second port of crude ore bin 6 connects
The second port of the second port and conditioning Tower 9 of deduster 8 is connect, the third port of crude ore bin 6 connects the second of raw ore elevator
Port；The first port of pulverized coal preparation injection system 7 connects coal dust supplied materials, the third port and iron of pulverized coal preparation injection system 7
The third port of miberal powder pre-heating system 4 connects；The first port of the first port of hot mine elevator 12 and hot mine injection system 13
It is connected；The second port of hot mine injection system 13 is connected with the second port of hot mine batcher 14；Hot mine batcher 14
First port connects the second port of hot mine injection pipeline 15, and the first port of hot mine injection pipeline 15 is connected to fusion reducing furnace
1 second port.
4 single series of Iron Ore Powder pre-heating system, which further includes, to be further illustrated to the structure of the present invention：Raw ore coming expects pipe 16, one
Grade cyclone cylinder 17, level-one heat exchange pipeline 18, level-one tremie pipe 19, two level cyclone cylinder 20, secondary heat exchange pipeline 21, two level tremie pipe
22, three-level cyclone cylinder 23, three-level heat exchange pipeline 24, three-level tremie pipe 25, heating device 26, level Four heat exchange pipeline 27, level Four rotation
Air duct 28, hot mine tremie pipe 29, breeze blowing pipeline 30, combustion-supporting gas carry out pipe 31, and coal gas comes pipe 32, exhanst gas outlet pipeline 33.
The first port connection exhanst gas outlet pipeline 33 of one cyclonic cylinder 17, the second port connection one of one cyclonic cylinder 17
The first port of grade heat exchange pipeline 18, the third port connection level-one tremie pipe 19 of one cyclonic cylinder 17；Two level cyclone cylinder 20
First port connects the second port of level-one heat exchange pipeline 18, the second port connection two level tremie pipe 22 of two level cyclone cylinder 20
First port, the third port connection secondary heat exchange pipeline 21 of two level cyclone cylinder 20；The first port of three-level cyclone cylinder 23 connects
Secondary heat exchange pipeline 21, the second port connection three-level heat exchange pipeline 24 of three-level cyclone cylinder 23, the third end of three-level cyclone cylinder 23
Mouth connection three-level tremie pipe 25；The first port connection level Four heat exchange pipeline 27 of heating device 26, the second end of heating device 26
Mouth connection three-level tremie pipe 25, the third port connection breeze blowing pipeline 30 of heating device 26, the 4th end of heating device 26
Mouth connection combustion air carrys out pipe 31, and the fifth port connection coal gas of heating device 26 carrys out pipe 32；The first end of Category Four cyclone cylinder 28
Mouthful connection three-level heat exchange pipeline 24, the second port of Category Four cyclone cylinder 28 connect hot mine tremie pipe 29, and the of Category Four cyclone cylinder 28
Three ports connect level Four heat exchange pipeline.
The technology path of the present invention is the coal gas of high temperature of fusion reducing furnace generation through vaporization gas hood and coal gas of high temperature processing system
It unites after cooling, purifying processing, gas temperature is down to 20~80 DEG C, and dustiness is down to 5mg/Nm3Hereinafter, clean coal pneumatic transmission is to Iron Ore Powder
Pre-heating system and coal dust co-fire, the original ore powder that the high-temperature flue gas of generation falls with eminence inversely and in the same direction exchange heat simultaneously into
Row, Iron Ore Powder temperature reaches 400~850 DEG C after multistage preheats, and entering fusion reducing furnace through the injection of high temperature feed-line carries out
It smelts, the heat smoke after heat exchange enters chimney after dedusting.Compared to existing two-stage rotary kiln Iron Ore Powder preheating technology, melting and reducing
Producer gas obtains reuse, and pre-heating system floor space is small, and pre-heating device is simple, realizes the efficient preheating prereduction of Iron Ore Powder.
Above-mentioned technical proposal in order to better understand, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
1400~1650 DEG C of the coal gas of high temperature come out from fusion reducing furnace 1,750~1100 are cooled to by vaporization gas hood 2
DEG C, dust content of gas is by 20~100g/Nm3It is down to 20~40g/Nm3；Coal gas of high temperature is through coal gas of high temperature processing system 3, coal gas drop
For temperature to 20~80 DEG C, dust content of gas is down to 5mg/Nm3Below；Purified gas enters Iron Ore Powder pre-heating system 4 and participates in Iron Ore Powder
Preheat prereduction；Iron Ore Powder supplied materials enters crude ore bin 6, and original ore powder, which is promoted to Iron Ore Powder pre-heating system 4, through raw ore elevator 5 pushes up
Portion；Raw coal is prepared as the thermal coal that moisture is less than 2%, injection to Iron Ore Powder pre-heating system through pulverized coal preparation injection system 7
4；The exhanst gas outlet pipeline 33 of Iron Ore Powder pre-heating system 4 leads to deduster 8 or conditioning Tower 9, and dedusting ash is delivered to crude ore bin 6, only
Flue gas is sent to discharge in chimney 10；For Iron Ore Powder after the preheating of Iron Ore Powder pre-heating system 4, temperature reaches 400~850 DEG C, passes through heat
Mine feed-line and hot mine elevator 12 are promoted to hot mine injection system 13.Hot miberal powder is with hot mine batcher 14 through hot mine injection tube
Line 15 is delivered to fusion reducing furnace 1 and is blown into stove, and participation reaction in furnace melting is molten iron.
The operation principle of wherein Iron Ore Powder pre-heating system is that original ore powder supplied materials is promoted to raw ore supplied materials by raw ore elevator 5
To level-one heat exchange pipeline 18 heat exchange, original ore powder warp occur in pipeline with the heat smoke for carrying out self-heating apparatus 26 for pipe 16, blanking
Enter one cyclonic cylinder 17 with heat smoke after level-one heating, in cyclonic separation blanking to level-one tremie pipe 19, the hot cigarette after heat exchange
Gas leaves one cyclonic cylinder 17 and enters exhanst gas outlet pipeline 33, and heat smoke temperature is less than 300 DEG C at this time；In level-one tremie pipe 19
To secondary heat exchange pipeline 21 in pipeline with the heat smoke for carrying out self-heating apparatus 26 heat exchange, hot miberal powder occur for hot miberal powder blanking
Enter in two level cyclone cylinder 20 with heat smoke, through in cyclonic separation blanking to two level tremie pipe 22, heat smoke leaves two level whirlwind
Cylinder 20 enters level-one heat exchange pipeline；Hot miberal powder blanking in two level tremie pipe 22 in pipeline and comes to three-level heat exchange pipeline 24
Heat exchange occurs for the heat smoke of self-heating apparatus 26, and hot miberal powder enters in three-level cyclone cylinder 23 with heat smoke, fallen through cyclonic separation
In material to three-level tremie pipe 25, heat smoke leaves three-level cyclone cylinder 23 and enters secondary heat exchange pipeline 21；In three-level tremie pipe 25
Hot miberal powder drops down onto in heating device 26, exchanges heat with heat smoke and enters Category Four cyclone cylinder 28 therewith；Hot miberal powder is fallen through cyclonic separation
In material to hot mine tremie pipe 29, heat smoke leaves Category Four cyclone cylinder 28 and enters in three-level heat exchange pipeline 24；In heating device 26
Heat smoke carrys out come the combustion air of pipe 31, coal gas the coal in pipe 32 by thermal coal, combustion-supporting gas from breeze blowing pipeline 30
Gas combustion reaction generates, 1300~1500 DEG C of heat smoke temperature.When fusion reducing furnace during normal production, gas supply stablize, add
Thermal 26 can use coal gas, pulverized coal preparation injection system 7 to can be used as blow-on use or spare completely.Heating device 26 passes through control
Reaction atmosphere processed, Iron Ore Powder can get 10~35% prereduction rate.It is reduced pressure atmosphere in one cyclonic cylinder~Category Four cyclone cylinder,
Pressure limit is between -200Pa~-1500Pa.
Technique effect
1. carrying out multistage preheating to mineral fine especially super finely ground slag by Iron Ore Powder pre-heating system, preheating is efficient, sets
For simple, floor space is small, investment is low, Iron Ore Powder preheating temperature is up to 400~850 DEG C, by adjusting atmosphere in heating device,
The prereduction rate that Iron Ore Powder 10~35% can be achieved, solves that existing two-stage rotary kiln device heat transfer efficiency is low, equipment takes up an area face
Product is big, cannot preheat the shortcomings that super finely ground slag；
It is used 2. being transported to after a large amount of high temperature coal gas purification of fusion reducing furnace in Iron Ore Powder pre-heating system, the energy is effectively sharp
It is got a promotion with rate, factory's entirety energy consumption declines；
3. the dust recycled in Iron Ore Powder pre-heating system flue gas is delivered to crude ore bin, the recycling of dedusting ash is simply realized
It utilizes；
4. by controlling Iron Ore Powder pre-heating system exit gas temperature, heat smoke heat, system thermal efficiency are effectively utilized
It is high.
Claims (9)
1. a kind of Iron Ore Powder efficiently preheats prereduction device, which is characterized in that including：Fusion reducing furnace (1), vaporization gas hood (2),
Coal gas of high temperature processing system (3), Iron Ore Powder pre-heating system (4), raw ore elevator (5), crude ore bin (6), pulverized coal preparation injection system
It unites (7), deduster (8), conditioning Tower (9), chimney (10), air-introduced machine (11), hot mine elevator (12), hot mine injection system
(13), hot mine batcher (14), hot mine injection pipeline (15)；
The first port of fusion reducing furnace (1) is connected to the first port of vaporization gas hood (2)；The second port of vaporization gas hood (2)
It is connected to the first port of coal gas of high temperature processing system (3)；The second port of coal gas of high temperature processing system (3) is preheated with Iron Ore Powder
6th port of system (4) is connected to；The second port of Iron Ore Powder pre-heating system (4) connects with the first port of raw ore elevator (5)
It is logical, the first port of Iron Ore Powder pre-heating system (4) and the first port of deduster (8), the first port and coal dust of conditioning Tower (9)
Prepare the second port connection of injection system (7), the of the 4th port of Iron Ore Powder pre-heating system (4) and hot mine elevator (12)
Two-port netwerk is connected to, and the fifth port of Iron Ore Powder pre-heating system (4) is connected to air-introduced machine (11)；The first port of crude ore bin (6) connects
Miberal powder supplied materials is connect, the second port of the second port and conditioning Tower (9) of the second port connection deduster (8) of crude ore bin (6) is former
The second port of the third port connection raw ore elevator of ore storage bin (6)；The first port of pulverized coal preparation injection system (7) connects coal
The third port of powder supplied materials, pulverized coal preparation injection system (7) is connect with the third port of Iron Ore Powder pre-heating system (4)；Hot mine carries
The first port of the machine of liter (12) is connected with the first port of hot mine injection system (13)；The second end of hot mine injection system (13)
Mouth is connected with the second port of hot mine batcher (14)；The first port of hot mine batcher (14) connects hot mine and is blown pipeline
(15) first port of second port, hot mine injection pipeline (15) is connected to the second port of fusion reducing furnace (1).
2. requiring the miberal powder efficiently to preheat prereduction device according to right 1, which is characterized in that further include：Raw ore coming expects pipe
(16), one cyclonic cylinder (17), level-one heat exchange pipeline (18), level-one tremie pipe (19), two level cyclone cylinder (20), secondary heat exchange pipe
Road (21), two level tremie pipe (22), three-level cyclone cylinder (23), three-level heat exchange pipeline (24), three-level tremie pipe (25), heating device
(26), level Four heat exchange pipeline (27), Category Four cyclone cylinder (28), hot mine tremie pipe (29), breeze blowing pipeline (31), combustion-supporting gas
Come manage (31), coal gas carrys out pipe (32), exhanst gas outlet pipeline (33)；
The first port connection exhanst gas outlet pipeline (33) of one cyclonic cylinder (17), the second port connection of one cyclonic cylinder (17)
The first port of level-one heat exchange pipeline (18), the third port connection level-one tremie pipe (19) of one cyclonic cylinder (17)；Two level is revolved
The second port of the first port connection level-one heat exchange pipeline (18) of air duct (20), the second port connection of two level cyclone cylinder (20)
The first port of two level tremie pipe (22), the third port connection secondary heat exchange pipeline (21) of two level cyclone cylinder (20)；Three-level is revolved
The second port of the first port connection secondary heat exchange pipeline (21) of air duct (23), three-level cyclone cylinder (23) connects three-level heat exchanger tube
Road (24), the third port connection three-level tremie pipe (25) of three-level cyclone cylinder (23)；The first port of heating device (26) connects
Level Four heat exchange pipeline (27), the second port connection three-level tremie pipe (25) of heating device (26), the third of heating device (26)
Port connects breeze blowing pipeline (30), and the 4th port connection combustion air of heating device (26) comes pipe (31), heating device
(26) fifth port connection coal gas carrys out pipe (32)；The first port connection three-level heat exchange pipeline (24) of Category Four cyclone cylinder (28),
The second port of Category Four cyclone cylinder (28) connects hot mine tremie pipe (29), and the third port connection level Four of Category Four cyclone cylinder (28) is changed
Heat pipeline.
3. requiring the miberal powder efficiently to preheat prereduction device according to right 2, which is characterized in that raw ore connects expects pipe (16) connection
On level-one heat exchange pipeline (18), level-one tremie pipe (19) is connected on secondary heat exchange pipeline (24), and two level tremie pipe (22) is even
It is connected on three-level heat exchange pipeline (24).
4. requiring the miberal powder efficiently to preheat prereduction device according to right 1, which is characterized in that 4 institute of Iron Ore Powder pre-heating system
Including preheating be classified as two level, three-level, level Four, Pyatyi or multistage, while being single series, bi serie or multi-series.
5. a kind of miberal powder requiring the device using claims 1 or 2 efficiently preheats prereduction technique, which is characterized in that
Processing step and the parameter of control are as follows：
1), 1400~1650 DEG C of the coal gas of high temperature come out from fusion reducing furnace 1,750~1100 are cooled to by vaporization gas hood 2
DEG C, dust content of gas is by 20~100g/Nm3It is down to 20~40g/Nm3；
2), coal gas of high temperature is through coal gas of high temperature processing system 3, and coal gas is cooled to 20~80 DEG C, and dust content of gas is down to 5mg/Nm3With
Under；
3), purified gas enters the preheating prereduction that Iron Ore Powder pre-heating system 4 participates in Iron Ore Powder；
4), Iron Ore Powder supplied materials enters crude ore bin (6), and original ore powder is promoted to Iron Ore Powder pre-heating system (4) through raw ore elevator (5)
Top；
5), raw coal is prepared as the thermal coal that moisture is less than 2% through pulverized coal preparation injection system (7), and injection is pre- to Iron Ore Powder
Hot systems (4)；
6), the exhanst gas outlet pipeline (33) of Iron Ore Powder pre-heating system (4) leads to deduster (8) or conditioning Tower (9), dedusting ash conveying
To crude ore bin (6), neat stress is sent to discharge in chimney (10)；
7), for Iron Ore Powder after the preheating of Iron Ore Powder pre-heating system 4, temperature reaches 400~850 DEG C, passes through hot mine feed-line and heat
Mine elevator (12) is promoted to hot mine injection system (13)；
8), hot miberal powder is delivered to fusion reducing furnace (1) through hot mine injection pipeline (15) with hot mine batcher (14) and is blown into stove, joins
It is molten iron with reaction in furnace melting.
6. technique according to claim 5, which is characterized in that the processing step of Iron Ore Powder pre-heating system (4) is as follows：
1), original ore powder supplied materials is promoted to raw ore coming expects pipe (16) by raw ore elevator (5), blanking to level-one heat exchange pipeline (18),
Heat exchange occurs with the heat smoke for carrying out self-heating apparatus (26) in pipeline, original ore powder enters one after level-one heats with heat smoke
Grade cyclone cylinder (17), cyclonic separation blanking is interior to level-one tremie pipe (19), and the heat smoke after heat exchange leaves one cyclonic cylinder (17)
Into exhanst gas outlet pipeline (33), heat smoke temperature is less than 300 DEG C at this time；
2), the hot miberal powder blanking in level-one tremie pipe (19) in pipeline and carrys out self-heating apparatus to secondary heat exchange pipeline (21)
(26) heat exchange occurs for heat smoke, and hot miberal powder enters with heat smoke in two level cyclone cylinder (20), through cyclonic separation blanking to two
In grade tremie pipe (22), heat smoke leaves two level cyclone cylinder (20) and enters level-one heat exchange pipeline；
3), the hot miberal powder blanking in two level tremie pipe (22) in pipeline and carrys out self-heating apparatus to three-level heat exchange pipeline (24)
(26) heat exchange occurs for heat smoke, and hot miberal powder enters with heat smoke in three-level cyclone cylinder (23), through cyclonic separation blanking to three
In grade tremie pipe (25), heat smoke leaves three-level cyclone cylinder (23) and enters secondary heat exchange pipeline (21)；
4), the hot miberal powder in three-level tremie pipe 25 drops down onto in heating device (26), exchanges heat with heat smoke and enters level Four therewith and revolves
Air duct (28)；
5), hot miberal powder is through in cyclonic separation blanking to hot mine tremie pipe (29), heat smoke leaves Category Four cyclone cylinder 28 and enters three-level
In heat exchange pipeline 24.
7. technique according to claim 6, which is characterized in that the heat smoke in heating device (26) is by coming from breeze blowing
Thermal coal, the combustion-supporting gas of pipeline (30) carry out the combustion air of pipe (31), coal gas carrys out the generation of the gas combustion reaction in pipe (32),
1300~1500 DEG C of heat smoke temperature；When fusion reducing furnace during normal production, gas supply is stablized, and heating device (26) makes completely
With coal gas, pulverized coal preparation injection system (7) uses or spare as blow-on.
8. technique according to claim 6, which is characterized in that heating device (26) is by controlling reaction atmosphere, Iron Ore Powder
It can get 10~35% prereduction rate.
9. technique according to claim 6, which is characterized in that it is reduced pressure atmosphere in one cyclonic cylinder~Category Four cyclone cylinder,
Pressure limit is between -200Pa~-1500Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810763092.7A CN108660310A (en) | 2018-07-11 | 2018-07-11 | A kind of Iron Ore Powder efficiently preheats prereduction device and technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810763092.7A CN108660310A (en) | 2018-07-11 | 2018-07-11 | A kind of Iron Ore Powder efficiently preheats prereduction device and technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108660310A true CN108660310A (en) | 2018-10-16 |
Family
ID=63773993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810763092.7A Pending CN108660310A (en) | 2018-07-11 | 2018-07-11 | A kind of Iron Ore Powder efficiently preheats prereduction device and technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108660310A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218831A (en) * | 2019-06-27 | 2019-09-10 | 山东大学 | A kind of be fully warmed-up cooperates with molten iron reduction apparatus and method with the coal gasification of gas phase prereduction |
| CN110803526A (en) * | 2019-11-26 | 2020-02-18 | 内蒙古赛思普科技有限公司 | Feeding and conveying system and method for smelting reduction furnace |
| WO2022227801A1 (en) * | 2021-04-27 | 2022-11-03 | 山东墨龙石油机械股份有限公司 | Iron-containing material composite injection method and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0426713A (en) * | 1990-05-22 | 1992-01-29 | Nisshin Steel Co Ltd | Smelting reduction iron-making method |
| CN101519707A (en) * | 2008-02-28 | 2009-09-02 | 宝山钢铁股份有限公司 | Hematite prereduction process and multistage fluidized bed thereby |
| CN103409576A (en) * | 2013-08-14 | 2013-11-27 | 北京首钢国际工程技术有限公司 | Energy recovery and dry dedusting process for gas from direct melting furnace |
| CN105648134A (en) * | 2016-03-11 | 2016-06-08 | 太原理工大学 | Gas base and coal base co-reduction iron ore powder method |
| CN107630139A (en) * | 2017-11-20 | 2018-01-26 | 徐州贝克福尔节能环保技术有限公司 | A kind of iron ore fluidization suspension preheating prereduction device and method |
| CN208748180U (en) * | 2018-07-11 | 2019-04-16 | 北京首钢国际工程技术有限公司 | A kind of Iron Ore Powder efficiently preheats prereduction device |
-
2018
- 2018-07-11 CN CN201810763092.7A patent/CN108660310A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0426713A (en) * | 1990-05-22 | 1992-01-29 | Nisshin Steel Co Ltd | Smelting reduction iron-making method |
| CN101519707A (en) * | 2008-02-28 | 2009-09-02 | 宝山钢铁股份有限公司 | Hematite prereduction process and multistage fluidized bed thereby |
| CN103409576A (en) * | 2013-08-14 | 2013-11-27 | 北京首钢国际工程技术有限公司 | Energy recovery and dry dedusting process for gas from direct melting furnace |
| CN105648134A (en) * | 2016-03-11 | 2016-06-08 | 太原理工大学 | Gas base and coal base co-reduction iron ore powder method |
| CN107630139A (en) * | 2017-11-20 | 2018-01-26 | 徐州贝克福尔节能环保技术有限公司 | A kind of iron ore fluidization suspension preheating prereduction device and method |
| CN208748180U (en) * | 2018-07-11 | 2019-04-16 | 北京首钢国际工程技术有限公司 | A kind of Iron Ore Powder efficiently preheats prereduction device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218831A (en) * | 2019-06-27 | 2019-09-10 | 山东大学 | A kind of be fully warmed-up cooperates with molten iron reduction apparatus and method with the coal gasification of gas phase prereduction |
| WO2020258806A1 (en) * | 2019-06-27 | 2020-12-30 | 山东大学 | Joint coal gasification and molten iron reduction device and method having sufficient preheating and gas phase prereduction |
| CN110803526A (en) * | 2019-11-26 | 2020-02-18 | 内蒙古赛思普科技有限公司 | Feeding and conveying system and method for smelting reduction furnace |
| WO2022227801A1 (en) * | 2021-04-27 | 2022-11-03 | 山东墨龙石油机械股份有限公司 | Iron-containing material composite injection method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103667571B (en) | System and method of fluidized direct reduction of iron ore concentrate powder | |
| CN103031433B (en) | Fluidized oxidation roasting-fluidized reduction roasting system and roasting process for titaniferous iron concentrate | |
| JP4769873B2 (en) | Molten iron manufacturing method with improved charging and discharging of fine iron ore and molten iron manufacturing apparatus using the same | |
| CN103031432A (en) | System for fluidized oxidizing/reducing roasting modification of titaniferous iron concentrate and roasting process | |
| AU691711B2 (en) | Fluidized bed type reduction apparatus for iron ores and method for reducing iron ores using the apparatus | |
| CN108660310A (en) | A kind of Iron Ore Powder efficiently preheats prereduction device and technique | |
| CN105112577B (en) | Dry granulating blast furnace slag waste heat recovery device and blast furnace slag waste heat recovery method | |
| CN106868245B (en) | A kind of molten iron making processes of two-step method | |
| CN110106303A (en) | A kind of shaft kiln directly reduced iron device of suitable gas base and coal base | |
| CN208748180U (en) | A kind of Iron Ore Powder efficiently preheats prereduction device | |
| CN112981027A (en) | Direct smelting process device for iron-containing zinc-containing solid waste in iron and steel plant | |
| CN101445850A (en) | Suspended secondary fast reduction process for iron-containing materials and device therefor | |
| CN103966380A (en) | Method for recycling dedusted powder in shaft furnace top gas | |
| CN105463140B (en) | A kind of high-temperature slag handles recovery system | |
| CN214694260U (en) | Direct smelting process device for iron-containing zinc-containing solid waste in iron and steel plant | |
| CN102002546B (en) | Iron-containing material suspending and reducing device and process | |
| JP4279785B2 (en) | Hot metal production apparatus for dry-air feeding iron ore and auxiliary materials and hot metal production method | |
| CN101792840B (en) | Ferrous material injection reduction furnace and ferrous material injection reduction process | |
| CN201381333Y (en) | Iron-bearing material suspension two-stage fast reducing furnace | |
| CN101307372A (en) | Device for manufacturing and reducing crust pellet and production process | |
| CN109680114A (en) | A kind of system and method for coal gasification collaboration reduction of iron ore | |
| CN101445851A (en) | Suspended reduction process for iron-containing materials and device therefor | |
| KR20000064874A (en) | Production method of molten pig iron or molten iron | |
| CN107475475A (en) | Handle the system and method containing Iron Ore Powder | |
| CN107723401A (en) | Handle the system and method containing Iron Ore Powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |