CN203653594U - Large-scale high-blast-temperature ball-type hot blast furnace - Google Patents
Large-scale high-blast-temperature ball-type hot blast furnace Download PDFInfo
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- CN203653594U CN203653594U CN201320742665.0U CN201320742665U CN203653594U CN 203653594 U CN203653594 U CN 203653594U CN 201320742665 U CN201320742665 U CN 201320742665U CN 203653594 U CN203653594 U CN 203653594U
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- ball
- blast furnace
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- warm syndrome
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Abstract
The utility model discloses a large-scale high-blast-temperature ball-type hot blast furnace for providing hot blast of more than 1250 DEG C for a blast furnace of which the volume is more than 2000 m<3>. The furnace body of a hot blast furnace has a six-section type structure. Double flue gas outlets and cold air inlets are formed in the lower part of an air inlet chamber; a hot air outlet is formed in the lower part of a burner; a ball bed in a heat accumulation chamber has a four-section type structure, and the diameter of the ball bed is phi9.2-phi10.2m, wherein the four-section type structure comprises a phi75 or phi80 ceramic base aluminum-zirconium-chromium ball type I of which the height is 2-2.5m, a phi60 ceramic base aluminum-zirconium-chromium ball type II of which the height is 3.5-4m, a phi50 or phi40 high-strength high-alumina ball of which the height is 4.5-5.5m, and a phi60 or phi75 high-strength high-alumina ball of which the height is 3.2-3.6m; the upper part of the ball bed adopts the ceramic base aluminum-zirconium-chromium ball type I with good slagging resistance and anti-adhesion performance. The ball-type hot blast furnace disclosed by the utility model has the advantages that the actual air temperature is only 80-90 DEG C lower than the vault temperature, and the blast temperature drop between the beginning and the end of the air supply cycle is only 15 DEG C so as to provide conditions for stable running of the blast furnace; the thermal efficiency of the ball-type hot blast furnace reaches more than 79.5%, and the ball-type hot blast furnace is simple in structure, convenient in construction and routine maintenance, and relatively low in one-time investment cost and running cost.
Description
Technical field
The utility model belongs to iron-smelting blast furnace hotblast stove technical field, and particularly one is 2000m
3above blast furnace, provides the large-scale high wind-warm syndrome pebble stove of more than 1250 DEG C hot blast.
Background technology
Existing Pebble Stove Technology is mostly at 1000m
3on the following blast furnace of level, use, maximum application is also no more than 2000m
3blast furnace.Existing pebble stove regenerator mainly adopts two-part or syllogic ball bed structure, and bottom adopts minor diameter high-strength high-alumina ball, and top adopts major diameter magnalium ball or corundum ball.It is easily bonding that magnalium ball and corundum ball are met dirt, causes ball bed ventilation property to reduce, and resistance is damaged and increased, and affects the work-ing life of ball bed, has seriously restricted the popularization of pebble stove on large-scale and ultra-large type blast furnace.
Close with the utility model have a Chinese patent 200420091754.4.This patent exists top corundum ball to meet easily bonding problem of dirt equally, also has following point: use minor diameter refractory ball in (1) ball bed foot cone, is unfavorable for that ball bed unloads ash so simultaneously; (2) cone-ball crown type furnace grate through-hole rate adopting is on the low side, and resistance is damaged larger; (3) inlet air plenum bottom adopts blind plate back cover, because on air blast is higher, easily causes furnace bottom cracking; (4) it is excessive that large vault top and the bottom all adopt turnover brick, masonry stress concentration, and cracky, and easily cause excessive place furnace shell cracking.
Utility model content
The purpose of this utility model is just to provide a kind of for 2000m
3above blast furnace, provides more than 1250 DEG C hot blast, and wind-warm syndrome level is high and steady time is long, thermo-efficiency is high, the large-scale high wind-warm syndrome pebble stove lower, gas utilization rate is high, the ball bed life-span is long, running cost is low falls in air-supply wind-warm syndrome at the whole story in cycle.
Solution of the present utility model is such:
A kind of large-scale high wind-warm syndrome pebble stove is 2000m
3above blast furnace provides more than 1250 DEG C hot blast, comprise exhanst gas outlet and cold wind import, inlet air plenum, fire grate, lower cone, regenerator, large vault, hot-blast outlet, burner and little vault, hot-blast furnace body is six segmentation structures, and first paragraph is inlet air plenum, is positioned at hotblast stove foot; Second segment is lower cone, is sitting in inlet air plenum, is positioned at hotblast stove middle and lower part; The 3rd section is regenerator, is positioned at hotblast stove middle part, on lower cone; The 4th section is large vault, is positioned at hotblast stove middle and upper part, in regenerator; The 5th section is burner, is positioned at hotblast stove top, on large vault; The 6th section is little vault, is sitting on burner, is positioned at hotblast stove topmost.Have two exhanst gas outlets or cold wind import in inlet air plenum bottom, have hot-blast outlet in burner bottom, fire grate is positioned at lower cone, is sitting in inlet air plenum.Regenerator endosphere bed adopts four-part form structure, and ball bed diameter is φ 9.2-φ 10.2m, wherein: φ 75 or φ 80 ceramic base aluminium zirconium chromium ball I types, high 2-2.5m; φ 60 ceramic base aluminium zirconium chromium ball II types, high 3.5-4m; φ 50 or or φ 40 high-strength high-alumina balls, high 4.5-5.5m; φ 60 or φ 75 high-strength high-alumina balls, high 3.2-3.6m, described φ 60 or φ 75 high-strength high-alumina balls are positioned at lower cone; Wherein ball bed top adopts anti-slag voltinism and the good ceramic base aluminium zirconium chromium ball I type of anti-stick, and its physical and chemical index is as following table:
| Project | Unit | Index |
| Al 2O 3 | ％ | ?≥60 |
| ZrO 2 | ％ | ≥5 |
| Cr 2O 3 | ％ | ≥0.5 |
| Fe 2O 3 | ％ | ≤0.8 |
| K 2O+Na 2O | ％ | ≤0.5 |
| Volume density | g/cm 3 | ?≥2.9 |
| Normal temperature withstand voltage | KN | ≥48 |
| Apparent porosity | ％ | ≤17 |
| Loading softening starts temperature (100N/ ball) | ℃ | 1550 |
| Thermal shock resistance (1100 DEG C, water-cooled) | Inferior | ≥10 |
Ball bed top adopt ceramic base aluminium zirconium chromium ball I type anti-slag voltinism and anti-stick fine, adopt in the lower cone of ball bed bottom major diameter high-strength high-alumina ball to be convenient to whole ball bed and unload ash.Can ensure that like this ball bed life-span is more than 8 years.
Technical scheme also comprises more specifically: described inlet air plenum bottom adopts butterfly pressure end socket back cover, can reduce stress concentration, avoids furnace bottom cracking.
Further: described burner is that fire hole number is that individual, the single fire hole burning of 42-56 blast furnace coal tolerance is 2000-2400Nm
3the flame-free ceramic burner of/h.
Further: it is the crystal fibre blanket of 1400-1450 DEG C that described large vault and regenerator, labyrinth, burner junction seam filler adopts use temperature, avoid filler under hot environment, to lose efficacy for a long time the wind-induced wall crazing of string occurs and large vault caves in.
Further: described large vault and burner all adopt down " V " type successively excessively supporting way be supported on furnace shell brick plate, make brick plate end away from furnace high-temperature district, ensured that brick plate can not injure because of the generation deformation of being heated the Stability Analysis of Structures of large vault and burner.
Further: described little vault is two sections of circular fitting stretched wire line style vaults, and its top center arranges thermometer hole.
Further: described exhanst gas outlet and cold wind import are divided into two angles in 90 °.
Further: described fire grate adopts new Cone-dome-type fire grate, and its ventilating pit is outer little interior large tapered square hole or plum blossom hole.
Further: the aspect ratio of described fire grate is 0.85-0.95.
The utility model has the advantages that:
1, through actual measurement, actual wind-warm syndrome of the present utility model is only lower 80 ~ 90 DEG C than dome temperature, uses single low combustion value furnace gas (3120KJ/m
3) can obtain more than 1250 DEG C wind-warm syndrome, as obtained more than 1300 DEG C wind-warm syndrome, only combustion air, blast furnace gas temperature need be preheating to more than 250 DEG C.
2, air-supply wind-warm syndrome at the whole story in cycle is only fallen for ~ 15 DEG C, compared with other types hotblast stove ~ 30 DEG C, be more conducive to the stable smooth operation of blast furnace.
3, thermo-efficiency of the present utility model reaches more than 79.5%, far above the hotblast stove of existing other types.
4, the utility model is simple in structure, and construction and routine maintenance are convenient, and investment cost and running cost are lower.
Brief description of the drawings
Accompanying drawing is embodiment of the present utility model.
Accompanying drawing 1 is sectional elevation of the present utility model.
Accompanying drawing 3 is the structural representation of fire grate 3.
Accompanying drawing 4 is A portion enlarged view in Fig. 3.
Accompanying drawing 5 be in Fig. 3 P to view one.
Accompanying drawing 6 be in Fig. 3 P to view two.
Embodiment
As shown in Figure 1, the utility model body of heater is six segmentation structures, and first paragraph is inlet air plenum 2, is positioned at hotblast stove foot; Second segment is lower cone 4, is sitting in inlet air plenum 2, is positioned at hotblast stove middle and lower part; The 3rd section is regenerator 5, is positioned at hotblast stove middle part, on lower cone 4; The 4th section is large vault 6, is positioned at hotblast stove middle and upper part, in regenerator 5; The 5th section is burner 8, is positioned at hotblast stove top, on large vault 6; The 6th section is little vault, is sitting on burner 8, is positioned at hotblast stove topmost.Have two exhanst gas outlets or cold wind import 1 in inlet air plenum 2 bottoms; Have hot-blast outlet 7 in burner 8 bottoms; Fire grate 3 is positioned at lower cone 4, is sitting in inlet air plenum 2.
In the present embodiment:
Fire grate 3 is cone-dome-type fire grate, is positioned at lower cone 4, is directly sitting in inlet air plenum 2 brickings, and its structural representation as shown in Figure 3.The aspect ratio of this fire grate is the 0.40-0.50 of 0.85-0.95 much larger than cone-ball crown type furnace grate, has better ventilation rate.Its ventilating pit 10 is outer little interior large tapered square hole or plum blossom hole, and dust can enter inlet air plenum with flue gas, can not cause ventilation property to reduce in fire grate place deposition.
Lower cone 4 is upper shed back taper, under repeatedly kick into air compartment 2, above connect regenerator 5.
Regenerator 5 ball beds adopt four-part form ball bed, and ball bed diameter is φ 9.2-φ 10.2m, wherein: φ 75 or φ 80 ceramic base aluminium zirconium chromium ball I types, high 2-2.5m; φ 60 ceramic base aluminium zirconium chromium ball II types, high 3.5-4m; φ 50 or or φ 40 high-strength high-alumina balls, high 4.5-5.5m; φ 60 or φ 75 high-strength high-alumina balls, high 3.2-3.6m, described φ 60 or φ 75 high-strength high-alumina balls are positioned at lower cone.
Large vault 6 is presented reducing taper, and bottom is connected with regenerator 5, and top is connected with burner 8, between bricking, does not contact mutually, adopts labyrinth type sliding joint to seal, can free expansion.Labyrinth seam filler employing use temperature is the crystal fibre blanket of 1400-1450 DEG C.Large vault 6 adopt " V " type of falling successively excessively supporting way be supported on furnace shell brick plate, its middle part cone section all adopts circular arc excessive with bottom straight section, top aditus laryngis section, working lining bricking adopts the good low-creep mullite brick of high-temperature behavior.
Burner 8 is high-power multiple fire hole flame-free ceramic burner, described burner 8 for fire hole number be that 42-56, single fire hole burning blast furnace coal tolerance are 2000-2400Nm
3the flame-free ceramic burner of/h, adopt " V " type of falling successively excessively supporting way be supported on furnace shell brick plate, its underpart has hot-blast outlet 7, top is sat little vault 9.Little vault 9 is two sections of circular fitting stretched wire line style vaults, and its top center arranges thermometer hole.
As shown in Figure 2, exhanst gas outlet and cold wind import 1 are divided into two angles in 90 ° and enter inlet air plenum 2, are conducive to the uniform of flue gas or cold wind air-flow.
As shown in Figure 5, described fire grate adopts new Cone-dome-type fire grate, and its ventilating pit is outer little interior large tapered square hole.
As shown in Figure 6, described fire grate adopts new Cone-dome-type fire grate, and its ventilating pit is plum blossom hole.
Claims (10)
1. a large-scale high wind-warm syndrome pebble stove, is 2000m
3above blast furnace provides more than 1250 DEG C hot blast, comprise exhanst gas outlet and cold wind import (1), inlet air plenum (2), fire grate (3), lower cone (4), regenerator (5), large vault (6), hot-blast outlet (7), burner (8) and little vault (9), hot-blast furnace body is six segmentation structures, first paragraph is inlet air plenum (2), is positioned at hotblast stove foot; Second segment is lower cone (4), is sitting in inlet air plenum (2) upper, is positioned at hotblast stove middle and lower part; The 3rd section is regenerator (5), is positioned at hotblast stove middle part, on lower cone (4); The 4th section is large vault (6), is positioned at hotblast stove middle and upper part, in regenerator (5); The 5th section is burner (8), is positioned at hotblast stove top, on large vault (6); The 6th section is little vault, is sitting in burner (8) upper, is positioned at hotblast stove topmost; Have two exhanst gas outlets and cold wind import (1) in inlet air plenum (2) bottom; Have hot-blast outlet (7) in burner (8) bottom; Fire grate (3) is positioned at lower cone (4), is sitting in inlet air plenum (2).
2. large-scale high wind-warm syndrome pebble stove according to claim 1, it is characterized in that: regenerator (5) endosphere bed adopts four-part form structure, ball bed diameter is φ 9.2-φ 10.2m, wherein: φ 75 or φ 80 ceramic base aluminium zirconium chromium ball I types, high 2-2.5m; φ 60 ceramic base aluminium zirconium chromium ball II types, high 3.5-4m; φ 50 or or φ 40 high-strength high-alumina balls, high 4.5-5.5m; φ 60 or φ 75 high-strength high-alumina balls, high 3.2-3.6m; Described φ 60 or φ 75 high-strength high-alumina balls are positioned at lower cone (4).
3. large-scale high wind-warm syndrome pebble stove according to claim 1, is characterized in that: described inlet air plenum (2) bottom adopts butterfly pressure end socket back cover.
4. large-scale high wind-warm syndrome pebble stove according to claim 1, is characterized in that: described burner (8) for fire hole number be that 42-56, single fire hole burning blast furnace coal tolerance are 2000-2400Nm
3the flame-free ceramic burner of/h.
5. large-scale high wind-warm syndrome pebble stove according to claim 1, is characterized in that: described large vault (6) and regenerator (5), burner (8) labyrinth, junction seam filler employing use temperature are the crystal fibre blanket of 1400-1450 DEG C.
6. large-scale high wind-warm syndrome pebble stove according to claim 1, it is characterized in that: described large vault (6) and burner (8) all adopt " V " type successively excessively supporting way be supported on furnace shell brick plate, make brick plate end away from furnace high-temperature district.
7. large-scale high wind-warm syndrome pebble stove according to claim 1, is characterized in that: described little vault (9) is two sections of circular fitting stretched wire line style vaults, and its top center arranges thermometer hole.
8. large-scale high wind-warm syndrome pebble stove according to claim 1, is characterized in that: described exhanst gas outlet and cold wind import (1) are divided into two angles in 90 °.
9. large-scale high wind-warm syndrome pebble stove according to claim 1, is characterized in that: described fire grate (3) is cone-dome-type fire grate, and its ventilating pit (10) is outer little interior large tapered square hole or plum blossom hole.
10. large-scale high wind-warm syndrome pebble stove according to claim 8, is characterized in that: the aspect ratio of described fire grate (3) is 0.85-0.95.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320742665.0U CN203653594U (en) | 2013-11-22 | 2013-11-22 | Large-scale high-blast-temperature ball-type hot blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320742665.0U CN203653594U (en) | 2013-11-22 | 2013-11-22 | Large-scale high-blast-temperature ball-type hot blast furnace |
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| Publication Number | Publication Date |
|---|---|
| CN203653594U true CN203653594U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320742665.0U Expired - Fee Related CN203653594U (en) | 2013-11-22 | 2013-11-22 | Large-scale high-blast-temperature ball-type hot blast furnace |
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| CN (1) | CN203653594U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844088A (en) * | 2018-06-19 | 2018-11-20 | 鞍钢重型机械有限责任公司 | A kind of abnormity plum blossom hole fire grate and stove fillings support system |
-
2013
- 2013-11-22 CN CN201320742665.0U patent/CN203653594U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844088A (en) * | 2018-06-19 | 2018-11-20 | 鞍钢重型机械有限责任公司 | A kind of abnormity plum blossom hole fire grate and stove fillings support system |
| CN108844088B (en) * | 2018-06-19 | 2024-05-17 | 鞍钢重型机械有限责任公司 | Grid with special-shaped plum blossom holes and hot-blast stove lattice brick supporting system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20161122 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |