CN208279643U - A kind of coal powder injection apparatus of blast furnace - Google Patents
A kind of coal powder injection apparatus of blast furnace Download PDFInfo
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- CN208279643U CN208279643U CN201820802738.3U CN201820802738U CN208279643U CN 208279643 U CN208279643 U CN 208279643U CN 201820802738 U CN201820802738 U CN 201820802738U CN 208279643 U CN208279643 U CN 208279643U
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- Prior art keywords
- coal
- blast furnace
- combustion
- combustion adjuvant
- injection apparatus
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- 239000003245 coal Substances 0.000 title claims abstract description 97
- 238000002347 injection Methods 0.000 title claims abstract description 58
- 239000007924 injection Substances 0.000 title claims abstract description 58
- 239000000843 powder Substances 0.000 title claims abstract description 36
- 238000002485 combustion reaction Methods 0.000 claims abstract description 66
- 239000002671 adjuvant Substances 0.000 claims abstract description 52
- 239000002817 coal dust Substances 0.000 claims abstract description 30
- 238000005303 weighing Methods 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 17
- 239000010959 steel Substances 0.000 abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 239000002893 slag Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 239000004615 ingredient Substances 0.000 description 7
- 238000005245 sintering Methods 0.000 description 7
- 238000007664 blowing Methods 0.000 description 6
- 229910000514 dolomite Inorganic materials 0.000 description 6
- 239000010459 dolomite Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 5
- 239000003830 anthracite Substances 0.000 description 5
- 229910052681 coesite Inorganic materials 0.000 description 5
- 229910052593 corundum Inorganic materials 0.000 description 5
- 229910052906 cristobalite Inorganic materials 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 229910052682 stishovite Inorganic materials 0.000 description 5
- 229910052905 tridymite Inorganic materials 0.000 description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000000571 coke Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000013475 authorization Methods 0.000 description 2
- 239000002802 bituminous coal Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Manufacture Of Iron (AREA)
Abstract
The utility model provides a kind of coal powder injection apparatus of blast furnace, belong to the ironmaking technology field in steel and iron industry, main includes the coal dust hopper (6-1) being linked in sequence, combustion adjuvant hopper (6-2), belt conveyer (3), feed bin (5), closed automatic Weighing feeder (7), ball mill (8), drier (10), mixer (13), pulverized coal distributor (14), blast furnace (12), wherein, pulverized coal bin (1) is set on coal dust hopper (6-1), combustion adjuvant storehouse (2) are set on combustion adjuvant hopper (6-2), electromagnetic separator (4) are set between belt conveyer (3) and feed bin (5), gas compressor (9) are set between drier (10) and mixer (13), injection tank (11) are also set up on mixer (13), pulverized coal distributor (14 ) and blast furnace (12) between injection tube (15) are set, the device effective guarantee efficiency of combustion and energy-conserving action of combustion adjuvant.
Description
Technical field
The utility model belongs to the ironmaking technology field in steel and iron industry, and in particular to a kind of coal powder injection apparatus of blast furnace.
Background technique
In blast furnace technology, mentioning high-coal ratio is to reduce coke ratio, improve economic and technical norms, control ironmaking production cost
Important measures.The key that coal injection effect embodies is burning of the reinforcing coal dust in Tuyere Raceway, and a large amount of theoretical researches
With practice have shown that, coal dust in tuyere area combustion rate less than 70%, as injecting coal quantity increases, the coal combustion rate meeting of Tuyere Raceway
It gradually decreases.A large amount of unburned coal powders and carbon black are trapped in cohesive zone and dropping zone, reduce the gas permeability of furnace charge, coal dust is caused to exist
Burning condition in blast furnace deteriorates, and combustion rate reduces, and coal-to-coke replacement is declined.The measure of overheavy firing is usually taken to promote
Make conflagration of the coal dust at blast-furnace tuyere, such as suitable combustion adjuvant be added in coal dust, can reduce coal dust enter furnace
Fiery temperature improves efficiency of combustion, reduces the ratio of putting coke into furnace of blast furnace.
In the technology for the combustion rate for improving coal dust for addition combustion adjuvant at present, the method for improving coal combustion rate has: logical
The oxygen diffusion velocity that pulverized coal injection addition aluminium powder accelerates coal dust is crossed, promotes the macromolecular cleavage of pulverized coal injection coal dust, realizes drop
Low coal powder ignition point and the purpose (referring to authorization publication number CN104087692B) for accelerating Combustion Efficiency of Coal Powder before blast-furnace tuyere, but
This method will affect the mobility of clinker because adding a large amount of aluminium, cause difficulty of slagging tap, and cause smooth operation of furnace difficult；It can also lead to
Addition pulverized coal injection combustion adjuvant is crossed, the combustibility of pulverized coal injection in blast furnace is effectively improved, improves burning of the coal dust before air port
Rate reduces unburned coal powder content (referring to authorization publication number CN101935572B, CN1042238C etc.), but due to coal dust combustion adjuvant
It is disposable expendable catalyst, large-scale industrial application, it is necessary to reduces combustion adjuvant preparation cost and consumption, also, coal
The ingredient and proportion of dust combustion improver are all related with coal, and combustion adjuvant needs special coal dedicated, bigger could play combustion-supporting effect, this
Outside, the performance of combustion adjuvant efficiently acted on also resides in the design of auxiliary combustion equipment, and excellent equipment is pulverized coal injection combustion supporting technology
It ensures.
Utility model content
The purpose of this utility model is to provide a kind of coal powder injection apparatus of blast furnace, which is characterized in that the coal including sequential connection
Powder slot (6-1), combustion adjuvant hopper (6-2), belt conveyer (3), feed bin (5), closed automatic Weighing feeder (7), ball
Grinding machine (8), drier (10), mixer (13), pulverized coal distributor (14), blast furnace (12).
Preferably, pulverized coal bin (1) is set on coal dust hopper (6-1).
Preferably, combustion adjuvant storehouse (2) are set on combustion adjuvant hopper (6-2).
Preferably, electromagnetic separator (4) are set between belt conveyer (3) and feed bin (5).
Preferably, gas compressor (9) are set between drier (10) and mixer (13).
Preferably, injection tank (11) are also set up on mixer (13).
Preferably, injection tube (15) are set between pulverized coal distributor (14) and blast furnace (12).
Preferably, coal powder injection apparatus of blast furnace is as shown in Figure 1.
Combustion adjuvant used in the utility model includes following mass percent ingredient: dedusting ash 15~30%, steel slag 20
~60%, dolomite 10~30%.
Preferably, the combustion adjuvant includes following mass percent ingredient: TFe 20~35%, CaO 35~45%, MgO
3~15%, SiO25~15%, Al2O32%~5%, MnO 2%~5%, other 5~10%.
Preferably, the granularity of the combustion adjuvant is greater than 75% for diameter 0.075mm is below.
Preferably, the dedusting ash is sintering device handpiece ash, and steel slag is converter slag.
Combustion adjuvant used in the utility model can be in the combustion-supporting middle application of pulverized coal injection, which is characterized in that the coal is smokeless
Coal or bituminous coal.
Preferably, the combustion adjuvant is in bituminous coal in use, dosage is the 1~3% of coal weight；It is used in anthracite
When, the dosage of the combustion adjuvant is the 1~7% of coal weight.
Preferably, after the combustion adjuvant is first mixed and is ground with coal dust, then through being blown into blast-furnace roasting.
The application method of blast-furnace coal powder combustion adjuvant used in the utility model, it is characterised in that: coal dust passes through pulverized coal bin (1)
Into coal dust hopper (6-1), combustion adjuvant enters combustion adjuvant hopper (6-2) by combustion adjuvant storehouse (2), passes through belt conveyer (3)
The mixing in feed bin (5), it is uniform into ball mill (8) ground and mixed by closed automatic Weighing feeder (7), in drier
(10) dry coal dust and combustion adjuvant, non-combustion-supporting conveying gas use blast furnace gas in, after gas compressor (9) pressurization, at
To convey blowing media, is entered in mixer (13) by connecting pipe, entered in mixer (13) by connecting pipe, passed through
Coal dust injection in mixer (13) is transported to pulverized coal distributor (14) by injection tank (11), is then dispatched to each injection tube
(15), it is sent into high furnace coal fines lance and carries out coal powder injection into blast furnace (12).
The utility model prepares coal-injection combustion improver by raw material of dedusting ash, steel slag and dolomite, realizes sintering dust and steel
The effectively recycling and utilization of the mineral resources such as Fe, Ca, Mg, Al in slag reduce steel plant's environmental pollution, have development cost low
It is honest and clean, the primary and secondary function of utilizing of resource is effectively realized in ironmaking production, there is significant economic and social benefit；It is used
Combustion adjuvant also solve uncombusted coal dust quantity before blast-furnace tuyere and increase and the problem of breathability of stock column for blast furnace difference, reduce coal
Powder enters the ignition temperature of furnace, improves Combustion Efficiency of Coal Powder, reduces the ratio of putting coke into furnace of blast furnace, raw convenient for large-scale industry
It produces.
In addition, coal powder injection apparatus of blast furnace provided by the utility model, the efficiency of combustion of effective guarantee combustion adjuvant and energy conservation are made
With.
Detailed description of the invention
Fig. 1 is a kind of coal powder injection apparatus of blast furnace；
Drawing reference numeral explanation: 1 it is pulverized coal bin, 2 is combustion adjuvant storehouse, 3 is belt conveyer, 4 is electromagnetic separator, 5 is material
Storehouse, 6-1 are coal dust hopper, 6-2 is combustion adjuvant hopper, 7 is closed automatic Weighing feeder, 8 is ball mill, 9 is gas pressure
Contracting machine, 10 be drier, 11 be injection tank, 12 be blast furnace, 13 be mixer, 14 be pulverized coal distributor, 15 be injection tube.
Specific embodiment
It is described in detail with reference to the accompanying drawings and detailed description.
Apparatus embodiments:
A kind of coal powder injection apparatus of blast furnace, as shown in Figure 1, main includes the coal dust hopper (6-1) being linked in sequence, combustion adjuvant hopper
(6-2), belt conveyer (3), feed bin (5), closed automatic Weighing feeder (7), ball mill (8), drier (10), mixing
Pulverized coal bin (1) is arranged on coal dust hopper (6-1) in device (13), pulverized coal distributor (14), blast furnace (12), on combustion adjuvant hopper (6-2)
It is arranged combustion adjuvant storehouse (2), electromagnetic separator (4) is set between belt conveyer (3) and feed bin (5), drier (10) and mixing
Gas compressor (9) are set between device (13), are also set up injection tank (11) on mixer (13), pulverized coal distributor (14) and blast furnace
(12) injection tube (15) are set between.
Coal dust enters coal dust hopper (6-1) by pulverized coal bin (1), and combustion adjuvant enters combustion adjuvant material by combustion adjuvant storehouse (2)
Slot (6-2), the mixing in feed bin (5) by belt conveyer (3), enters ball milling by closed automatic Weighing feeder (7)
Machine (8) ground and mixed is uniform, and dry coal dust and combustion adjuvant, non-combustion-supporting conveying gas use blast furnace gas in drier (10),
After gas compressor (9) pressurization, becomes conveying blowing media, entered in mixer (13) by connecting pipe, pass through spray
It blows tank (11) and the coal dust injection in mixer (13) is transported to pulverized coal distributor (14), be then dispatched to each injection tube
(15), it is sent into high furnace coal fines lance and carries out coal powder injection into blast furnace (12).
Embodiment of the method 1
Utilize pulverized coal injection in blast furnace sample (Industrial Analysis and elemental analysis see the table below) in laboratory: coal powder size is -200
Mesh is 76%, 1100 DEG C of wind-warm syndrome, 1500 DEG C of chamber temperature, is recycled using blast furnace coal injection simulated experiment apparatus analog blast furnace air port
Area's condition investigates combustion adjuvant to pulverized coal injection combustion-supporting and energy-saving effect.
Using certain steel mill 4000m3Blast furnace carries out the combustion-supporting experiment of coal injection, and with 30 days for a test period, investigation is helped
Agent is fired to pulverized coal injection combustion-supporting and energy-saving effect, and blowing coal is anthracite, and equipment is the coal powder injection apparatus of blast furnace of apparatus embodiments.
Combustion adjuvant uses sintering machine head end dedusting ash 30%, steel slag (converter slag) 60%, dolomite 10%, comprehensive ingredient
Are as follows: TFe about 34%, CaO about 38%, MgO about 4%, SiO2About 10%, Al2O3About 2%, MnO about 5%, other about 7%.
Experimental period, adds combustion adjuvant by the 1% of raw coal quality, using ball mill by combustion adjuvant and pulverized coal grinding powder,
On the basis of guaranteeing pulverized coal injection effect, the mineral resources such as Fe, Ca, Mg, Al is effectively returned in realization sintering dust and steel slag
It receives and utilizes, reduce steel plant's environmental pollution, blast furnace coal ratio is increased to 145kg/t by 139kg/t, promotes the comprehensive warp of pulverized coal injection
Ji benefit, is convenient for large-scale industrial production.
Embodiment 2
Using steel mill 4000m3Blast furnace carries out the combustion-supporting experiment of coal injection, with 30 days for a test period, investigates combustion-supporting
To pulverized coal injection combustion-supporting and energy-saving effect, blowing coal is anthracite for agent, and equipment is the coal powder injection apparatus of blast furnace of apparatus embodiments.
Combustion adjuvant uses sintering machine head end dedusting ash 20%, steel slag 60%, dolomite 20%, comprehensive ingredient are as follows: TFe is about
28%, CaO about 43%, MgO about 8%, SiO2About 8%, Al2O3About 2%, MnO about 5%, other about 6%.
Experimental period, adds combustion adjuvant by the 1% of raw coal quality, using ball mill by combustion adjuvant and pulverized coal grinding powder.It is high
Furnace coal ratio is increased to 145kg/t by 139kg/t.
Embodiment 3
Using steel mill 4000m3Blast furnace carries out the combustion-supporting experiment of coal injection, with 30 days for a test period, investigates combustion-supporting
To pulverized coal injection combustion-supporting and energy-saving effect, blowing coal is anthracite for agent, and equipment is the coal powder injection apparatus of blast furnace of apparatus embodiments.
Combustion adjuvant uses sintering machine head end dedusting ash 30%, steel slag 40%, dolomite 30%, comprehensive ingredient are as follows: TFe30%,
CaO about 39%, MgO about 12%, SiO2About 7%, Al2O3About 2%, MnO about 3%, other about 7%.
Experimental period, adds combustion adjuvant by the 1% of raw coal quality, using ball mill by combustion adjuvant and pulverized coal grinding powder.It is high
Furnace coal ratio is increased to 145kg/t by 139kg/t.
Embodiment 4
Using steel mill 4000m3Blast furnace carries out the combustion-supporting experiment of coal injection, with 30 days for a test period, investigates combustion-supporting
To pulverized coal injection combustion-supporting and energy-saving effect, blowing coal is anthracite for agent, and equipment is the coal powder injection apparatus of blast furnace of apparatus embodiments.
Combustion adjuvant uses sintering machine head end dedusting ash 10%, steel slag 60%, dolomite 30%, comprehensive ingredient are as follows: TFe is about
21%, CaO about 47%, MgO about 12%, SiO2About 8%, Al2O3About 2%, MnO about 5%, other about 5%.
Experimental period, adds combustion adjuvant by the 1% of raw coal quality, using ball mill by combustion adjuvant and pulverized coal grinding powder.It is high
Furnace coal ratio is increased to 145kg/t by 139kg/t.
Particular embodiments described above be to the purpose of utility model, technical scheme and beneficial effects it is further in detail
Illustrate, it should be understood that embodiments above, is not used to limit the protection scope of the utility model, it is practical based on this
Within novel method and thought, any transformation, equivalent replacement, improvement for being done etc. belong to the protection model of the utility model
It encloses.Following drawings are only intended to schematically illustrate and explain the present invention, does not limit the scope of the utility model.
Claims (7)
1. a kind of coal powder injection apparatus of blast furnace, which is characterized in that coal dust hopper (6-1), combustion adjuvant hopper (6- including sequential connection
2), belt conveyer (3), feed bin (5), closed automatic Weighing feeder (7), ball mill (8), drier (10), mixer
(13), pulverized coal distributor (14), blast furnace (12).
2. a kind of coal powder injection apparatus of blast furnace according to claim 1, which is characterized in that coal dust is arranged on coal dust hopper (6-1)
Storehouse (1).
3. a kind of coal powder injection apparatus of blast furnace according to claim 1, which is characterized in that be arranged on combustion adjuvant hopper (6-2) and help
It fires agent storehouse (2).
4. a kind of coal powder injection apparatus of blast furnace according to claim 1, which is characterized in that belt conveyer (3) and feed bin (5) it
Between be arranged electromagnetic separator (4).
5. a kind of coal powder injection apparatus of blast furnace according to claim 1, which is characterized in that drier (10) and mixer (13) it
Between be arranged gas compressor (9).
6. a kind of coal powder injection apparatus of blast furnace according to claim 1, which is characterized in that mixer also sets up injection tank on (13)
(11)。
7. a kind of coal powder injection apparatus of blast furnace according to claim 1, which is characterized in that pulverized coal distributor (14) and blast furnace (12)
Between be arranged injection tube (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820802738.3U CN208279643U (en) | 2018-05-28 | 2018-05-28 | A kind of coal powder injection apparatus of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820802738.3U CN208279643U (en) | 2018-05-28 | 2018-05-28 | A kind of coal powder injection apparatus of blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208279643U true CN208279643U (en) | 2018-12-25 |
Family
ID=64706213
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820802738.3U Expired - Fee Related CN208279643U (en) | 2018-05-28 | 2018-05-28 | A kind of coal powder injection apparatus of blast furnace |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110982577A (en) * | 2018-10-02 | 2020-04-10 | 孙文彬 | Application of converter dust and mud as combustion improver in fuel combustion |
-
2018
- 2018-05-28 CN CN201820802738.3U patent/CN208279643U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110982577A (en) * | 2018-10-02 | 2020-04-10 | 孙文彬 | Application of converter dust and mud as combustion improver in fuel combustion |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181225 |