CN201648423U - Blast furnace - Google Patents
Blast furnace Download PDFInfo
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- CN201648423U CN201648423U CN2010201692948U CN201020169294U CN201648423U CN 201648423 U CN201648423 U CN 201648423U CN 2010201692948 U CN2010201692948 U CN 2010201692948U CN 201020169294 U CN201020169294 U CN 201020169294U CN 201648423 U CN201648423 U CN 201648423U
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- air port
- blast furnace
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Abstract
The utility model discloses a steel making blast furnace which relates to the metallurgical field. Radial tuyeres are uniformly distributed at the position of a furnace cylinder along the circumferential direction of the blast furnace, an included angle between the axle line of each radial tuyere and the radial direction of the blast furnace is zero DEG, oblique tuyeres (2) are uniformly distributed above or below the radial tuyeres (1) along the circumferential direction of the blast furnace, the absolute valve of the horizontal included angle between each oblique tuyere (2) and the radial direction of the blast furnace is larger than zero, and the horizontal included angles of the oblique tuyeres (2) are equal. Through the matching of blast parameters, the center of the furnace cylinder is activated through the radial tuyeres, and a ring belt zone between the center and rim of the furnace cylinder is activated through the oblique tuyeres, so as to avoid dead zones formed between the tuyeres, thereby avoiding excessive reduction of TiO2 and adapting to the special smelting requirements for vanadium-titanium magnetite. Therefore, the blast furnace is suitable for smelting iron ores and particularly the vanadium-titanium magnetite.
Description
Technical field
The utility model relates to field of metallurgy, especially a kind of iron-smelting blast furnace.
Background technology
During smelting vanadium-titanium magnetite by blast furnace, owing to TiO2 in the slag is reduced slag is become sticky, for blast furnace production brings disadvantageous effect.Particularly TiO2 is reduced and generates a large amount of TiC, TiN and sosoloid Ti thereof (C in the time of N), produces great effect to the slag structure, and slag viscosity is sharply increased in the slag.Under the blast furnace condition, CO and H2 can only generate TiO2 reduction the suboxide of titanium, a large amount of Ti (C, N) be below the blast furnace melting with soft between the blast furnace tuyere zone since the existence of solid coke generate by direct reduction.
Present blast furnace, blast-furnace tuyere axially all point to the blast furnace central axis.In the smelting process, hot blast is blown in the stove at a high speed by the air port, but hot blast can not directly arrive the zone between each air port, forms " dead band " in these zones, confirms by the dissection to present blast furnace, and the dead band is Ti (C, N) the highest zone of content between the interior air port of stove.
The utility model content
In order to overcome existing deficiency, technical problem to be solved in the utility model provides a kind of can avoiding and forms dead band between the air port, thereby avoids the excessive reduction of TiO2, can adapt to the blast furnace of the special smelting demand of vanadium titano-magnetite.
The technical scheme that its technical problem that solves the utility model adopts is: blast furnace, axially be followed successively by furnace throat, shaft, furnace bosh, bosh, cupola well, furnace bottom from top to bottom along it, circumferentially be evenly equipped with radially air port of one deck at described cupola well position along blast furnace, radially the axis and the blast furnace radial horizontal sextant angle in air port are zero for each, circumferentially be evenly equipped with one deck and blast furnace radial horizontal sextant angle absolute value greater than zero inclination air port along blast furnace above or below described radially air port, each inlet horizontal angle that tilts equates.
The beneficial effects of the utility model are: the air blast parameter in two-layer air port is different about the cupola well position, radially the air port requires blast energy big, can blow to place near the cupola well center, to enliven the cupola well center, the inclination air port requires as far as possible hot blast to be blown into the ring belt area between the cupola well center and peripheral, help enlivening this zone and eliminate the dead band that former individual layer air port blast furnace forms between the air port, thereby avoid the excessive reduction of TiO2, can adapt to the special smelting demand of vanadium titano-magnetite.
As a kind of preferred version, described inclination air port axis and blast furnace radial horizontal sextant angle are 50～60 °.
Further, described inclination air port is arranged at the radially top in air port.
Further, described inclination air port and the radially adjacent setting in air port, described inclination air port is with radially the air port is consistent with blast furnace radial longitudinal angle.
Further, described inclination air port is arranged at the cupola well top with air port radially.
Further, in described blast furnace stack bottom one deck reduction air port is set.
Further, at described blast furnace bosh one deck reduction air port is set.
Further described reduction air port axis and blast furnace radial horizontal sextant angle are zero.
Description of drawings
Fig. 1 is a front view of the present utility model;
Fig. 2 is the distribution schematic diagram of inclination of the present utility model air port in axis projection.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
As shown in Figure 1 and Figure 2, blast furnace of the present utility model, axially be followed successively by furnace throat, shaft 6, furnace bosh 5, bosh, cupola well 4, furnace bottom from top to bottom along it, circumferentially be evenly equipped with radially air port 1 of one deck at described cupola well 4 positions along blast furnace, radially the axis and the blast furnace radial horizontal sextant angle in air port 1 are zero for each, circumferentially be evenly equipped with one deck and blast furnace radial horizontal sextant angle absolute value greater than zero inclination air port 2 along blast furnace above or below described radially air port 1, each air port 2 horizontal sextant angle that tilt equates.
Above-mentioned inclination air port 2 axis and blast furnace radial horizontal sextant angle absolute value are greater than zero, and air port 2 axis that promptly tilt do not point to the blast furnace central axis, and its axis can point to blast furnace central axis left side as shown in Figure 2, also can point to blast furnace central axis right side.
The air blast parameter in two-layer air port is different about cupola well 4 positions, radially air port 1 requires blast energy big, can blow to place near cupola well 4 centers, to enliven cupola well 4 centers, inclination air port 2 requires as far as possible hot blast to be blown into the ring belt area between cupola well 4 center and peripherals, help enlivening this zone and eliminate the dead band that former individual layer air port blast furnace forms between the air port, thereby avoid the excessive reduction of TiO2, can adapt to the special smelting demand of vanadium titano-magnetite.And inclination air port 2 formed gyration airflows also more help near the diffusion of air-flow furnace shell.
The air flow line in above-mentioned inclination air port 2 is main relevant with blast furnace radial horizontal sextant angle with its axis, and concrete horizontal sextant angle is provided with mainly and the air blast relating to parameters in air port 1, inclination air port 2 radially.But along with the variation of inner operating in the blast furnace ironmaking process, the air blast parameter is dynamically to adjust, and therefore corresponding dead zone range also changes, but will realize that the dynamic coupling of air port 2 angle parameters and air blast parameter is difficult.Therefore, best, described inclination air port 2 axis and blast furnace radial horizontal sextant angle are 50～60 °.When horizontal sextant angle is 50～60 °, 2 ring belt areas that directly cover, inclination air port can cover the most of dead band in the whole air blast parameter area, even the zone that also exists part directly not covered also can cover by the diffusion of inclination air port 2 gyration airflow that forms, thereby avoid the formation in dead band to greatest extent near furnace shell.
Described inclination air port 2 can be arranged on radially above or below the air port 1.But when inclination air port 2 is arranged on radially 1 below, air port, diffusion increases inclination air port 2 air-flows to the middle part, inclination air port 2, the radially lap increase of 1 overlay area, air port, radially air port 1 air-flow increases the trend of inclination air port 2 air-flows extruding downwards, therefore is unfavorable for tilting effective covering of 2 pairs of ring belt areas, air port.Therefore best, described inclination air port 2 is arranged at the radially top in air port 1, radially compile the diffusion meeting that forms upstream inclination air port 2 air-flow that forms formed outside extruding in air port 1 this moment, thereby more help tilting of the covering of air port 2 air-flows, more help avoiding the formation in dead band the ring belt area.
According to the difference of blast furnace, the difference of position on cupola well 4, air port, inclination air port 2 is different with air port 1 spacing radially, inclination air port 2 and air port 1 radially with blast furnace radial longitudinal angle can be consistent also can be inconsistent.But best, described inclination air port 2 and radially air port 1 adjacent setting, described inclination air port 2 is with radially air port 1 is consistent with blast furnace radial longitudinal angle.After in air-flow enters stove, raising force is very big, in the air-flow uphill process, consume gradually until being zero by the additional horizontal kinetic energy of gas blower, therefore the setting 1 adjacent in inclination air port 2 and air port radially, that longitudinal angle is consistent, both air-flows all are in the moment of horizontal kinetic energy maximum, more help the interaction of both air-flows, thereby promote the diffusion of air-flow, to realize no dead band covering to whole axial cross section.
Further, described inclination air port 2 is arranged at cupola well 4 tops with air port 1 radially.
Described inclination air port 2 both can also can be staggered in vertical direction with air port 1 radially in overlapping arrangement, the air port number is according to furnace volume or cupola well 4 diameter arrangements, be the blast furnace of 1200m3 for volume, best, radially air port 1, inclination air port 2 are provided with 10 respectively.
Above-mentioned inclination air port 2 axis and blast furnace radial horizontal sextant angle promptly in the axis projection of blast furnace, inclination air port 2 axis and blast furnace radial angle; Above-mentioned inclination air port 2 axis and blast furnace radial longitudinal angle promptly in the axial cross section of blast furnace, the angle of inclination air port 2 axis and blast furnace horizontal radial.
In order further to avoid the excessive reduction of TiO2, one deck reduction air port 3 is set in described blast furnace stack 6 bottoms.In stove, blast the solid charge on reducing gas or reductive agent reduction blast furnace top by reduction air port 3, improve the reduction degree of blast furnace top furnace charge.The reducing gas temperature can be lower than the furnace charge or the gas temperature of reduction 3 regions, air port, but should remain on more than 500 ℃.Reducing gas temperature and quantity and air blast parameter can be adjusted according to the composition and the temperature of stock gas.Except that reducing gas, can also in stove, blast solid reductant, particularly coal dust.
Because the reduction of iron ore more than cohesive zone increases, and can reduce the blast furnace melting with soft position, thereby shorten the drippage height of iron liquid and slag liquid; Blast reducing gas simultaneously, it is active to help cupola well, helps iron liquid and slag liquid enters cupola well 4 by the carbon columnar region fast, reduces the duration of contact of slag and coke, thereby also can reduce the reduction of TiO2.Simultaneously, reducing gas blasts the consumption that can also reduce coke in the blast furnace.
Above-mentioned reduction air port 3 the position to be set actual be relevant with the position of cohesive zone in the stove, the position in reduction air port 3 should be positioned at the cohesive zone top.Because the reduction of cohesive zone position as mentioned above, reduction air port 3 also can be arranged on the position of blast furnace bosh 5; Perhaps be arranged on shaft 6 and furnace bosh 5 simultaneously.Best is to be arranged on shaft 6 and furnace bosh 5 simultaneously, promptly at described blast furnace bosh 5 one deck reduction air port 3 is set, and the setting in two-layer reduction air port 3 more helps the adjustment to the selection that blasts the position, air blast parameter, therefore more helps the adjustment to inner operating.According to the characteristics that purpose and this position gas stream in the stove are set in reduction air port 3, reduction air port 3 axis and blast furnace radial horizontal sextant angle are zero.
The improvement of blast furnace of the present utility model is primarily aimed at the smelting of vanadium titano-magnetite, but this blast furnace avoided the dead band formation, reduced the consumption of coke, be equally applicable to the smelting of other types iron ore.
Claims (8)
1. blast furnace, axially be followed successively by furnace throat, shaft (6), furnace bosh (5), bosh, cupola well (4), furnace bottom from top to bottom along it, circumferentially be evenly equipped with one deck radially air port (1) at described cupola well (4) position along blast furnace, radially the axis and the blast furnace radial horizontal sextant angle of air port (1) are zero for each, it is characterized in that: circumferentially be evenly equipped with one deck and blast furnace radial horizontal sextant angle absolute value greater than zero inclination air port (2) along blast furnace above or below described radially air port (1), each air port that tilts (2) horizontal sextant angle equates.
2. blast furnace as claimed in claim 1 is characterized in that: described inclination air port (2) axis and blast furnace radial horizontal sextant angle are 50～60 °.
3. blast furnace as claimed in claim 1 or 2 is characterized in that: described inclination air port (2) is arranged at the radially top of air port (1).
4. blast furnace as claimed in claim 3 is characterized in that: described inclination air port (2) and the radially adjacent setting in air port (1), described inclination air port (2) is consistent with blast furnace radial longitudinal angle with radially air port (1).
5. blast furnace as claimed in claim 4 is characterized in that: described inclination air port (2) is arranged at cupola well (4) top with radially air port (1).
6. blast furnace as claimed in claim 1 is characterized in that: one deck reduction air port (3) is set in described blast furnace stack (6) bottom.
7. as claim 1 or 6 described blast furnaces, it is characterized in that: one deck reduction air port (3) is set at described blast furnace bosh (5).
8. blast furnace as claimed in claim 7 is characterized in that: described reduction air port (3) axis and blast furnace radial horizontal sextant angle are zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201692948U CN201648423U (en) | 2010-04-26 | 2010-04-26 | Blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201692948U CN201648423U (en) | 2010-04-26 | 2010-04-26 | Blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201648423U true CN201648423U (en) | 2010-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201692948U Expired - Fee Related CN201648423U (en) | 2010-04-26 | 2010-04-26 | Blast furnace |
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| CN (1) | CN201648423U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139326A (en) * | 2020-02-14 | 2020-05-12 | 山东钢铁股份有限公司 | Blast furnace |
| CN112344737A (en) * | 2020-11-09 | 2021-02-09 | 赵天赐 | Internal and external burner blast smelting furnace |
-
2010
- 2010-04-26 CN CN2010201692948U patent/CN201648423U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139326A (en) * | 2020-02-14 | 2020-05-12 | 山东钢铁股份有限公司 | Blast furnace |
| CN112344737A (en) * | 2020-11-09 | 2021-02-09 | 赵天赐 | Internal and external burner blast smelting furnace |
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Legal Events
| 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: 20101124 Termination date: 20160426 |