CN100494409C - Blast-furnace for reducing sponge iron - Google Patents
Blast-furnace for reducing sponge iron Download PDFInfo
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- CN100494409C CN100494409C CNB2006101344030A CN200610134403A CN100494409C CN 100494409 C CN100494409 C CN 100494409C CN B2006101344030 A CNB2006101344030 A CN B2006101344030A CN 200610134403 A CN200610134403 A CN 200610134403A CN 100494409 C CN100494409 C CN 100494409C
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Abstract
The invention discloses a blast furnace to create and reduce sponge iron, which comprises the following parts: feed device, furnace and discharge hole, wherein the feed device connects the upper end of furnace; the upper draining hole is opened on the upper end of furnace with upper and lower two rows of blast orifice in the middle of furnace, which possesses lower vent on the bottom of furnace; the core column is set in the furnace cavity; the furnace connects core column and basic seat; the discharge hole is set on the bottom of furnace, which connects the continuous outlet in connection with declaration machine; the upper and lower vents connect deduster through pipe, which connects main pipe in connection with heating bin; the blast pipe is set in the heating bin, which connects diverting pipe through pipe in connection with upper and lower blast vents; the thruster connects upper vent through pipe.
Description
Technical field: the invention relates to a kind of production unit of producing sponge iron, particularly a kind of blast furnace of reducing sponge iron.
Background technology: at present, produce sponge iron and mainly contain two kinds in rotary kiln and tunnel furnace, but all exist the recovery time long, crude fuel is required harsh, thereby cause the production cost height, and the both exists the remaining tail gas in reduction back directly to enter in the atmosphere, can not make full use of, waste energy, plant factor is low.
Summary of the invention: in order to address the above problem, the invention provides a kind of novel blast-furnace of reducing sponge iron, has the recovery time weak point, can make full use of the remaining tail gas in reduction back, has effectively improved plant factor, and save energy has reduced cost.The technical scheme that the invention is adopted is: a kind of blast furnace of reducing sponge iron, comprise feeding unit (2), body of heater (27), discharge gate (17), it is characterized in that feeding unit (2) is connected with body of heater (27) upper end, venting port (21) on body of heater (27) upper end edge furnace body wall uniform distribution, at body of heater (27) middle part along on the furnace body wall uniform distribution, two arrange blast orifices (12) down, venting port (14) under body of heater (27) lower end edge furnace body wall uniform distribution, in body of heater (27) inner chamber stem stem (7) is arranged, body of heater (27) is connected with basis seat (16) with stem stem (7), body of heater (27) bottom uniform distribution discharge gate (17), discharge gate (17) passes basis seat (16) and stirs cage outlet (19) and be connected, and stirs cage and exports (19) and be connected with step-down gear (18); The described venting port (21) of going up is connected with fly-ash separator (5) by pipeline (6) with following venting port (14), fly-ash separator (5) is connected with house steward (8), house steward (8) is connected with heating cabinet (24), blast pipe (9) is arranged in the heating cabinet (24), blast pipe (9) passes heating cabinet (24) and is connected with gas-distributing pipe (23) by pipeline (6), gas-distributing pipe (23) is connected with upper and lower two blast orifices (12), diffuses valve (22) and is connected with last venting port (21) by pipeline (6).
Described feeding unit (2) comprises pulley bracket (1), upper and lower two material handleless cups (3), and sealing plate (4), material handleless cup (3) flexibly connects by pulley bracket (1) and sealing plate (4).
Described body of heater (27) is made up of preheating section (10), reduction section (11) and cooling section (26), and the outer wall of described cooling section (26) has a circle steel shell (15).
Utilize the processing step of the invention reducing sponge iron as follows: the 1st materials-stored box of in advance furnace charges such as smart powder of iron and coal being put into feeding unit, material handleless cup above opening in the feeding unit earlier, mixed furnace charge is entered in the 2nd materials-stored box, close top material handleless cup, open following material handleless cup, furnace charge enters in the body of heater, closes the material handleless cup.Add the gas of prior preheating by blast orifice to reduction section, keep the reduction section temperature, produce coal gas CO behind gas and the coal combustion, CO and ferric oxide generation redox reaction, reduced iron, generation CO at 1150 ℃～1200 ℃
2Gas mixes gas in uphill process, the continuous and ferric oxide generation redox reaction of CO, and reduced iron, mixed gas enters in the preheating section, and furnace charge is preheated in the decline process, rises to tail gas CO, the CO of furnace roof
2Enter pipeline Deng mixed gas through last venting port, enter in the fly-ash separator.The furnace charge of preheating section continues to drop to reduction section in the body of heater, fully reduction; By the gas secondary combustion coal that the lower end blast orifice is blown into, the CO of generation continues reducing iron oxides, along with the decline of furnace charge, and CO, CO that the lower end produces
2Mixed gas warp venting port down enters pipeline, enters in the fly-ash separator by pipeline.The intravital furnace charge of stove continues to drop to cooling section, feeds recirculated water in the cavity that cooling section steel shell and outer wall form, and furnace charge is lowered the temperature rapidly, enters through discharge gate and stirs the cage outlet.The tail gas of being discharged by each venting port is aggregated in the fly-ash separator through pipeline, and the tail gas after the purification enters heating cabinet by house steward, once more burning, the heating drum airduct, gas in the preheating drum airduct, the gas after the preheating enters in the body of heater through pipeline, gas-distributing pipe, blast orifice, continues the reduction furnace charge.
The beneficial effect of the invention is: because it is dual airtight to be provided with upper and lower two material handleless cups in feeding unit, make the obturation effect at opening for feed place better, prevent the leakage of gas.The tail gas that each venting port is discharged is aggregated in the fly-ash separator through pipeline, purifies after house steward enters heating cabinet, burns once more, gas in the heating drum airduct, the gas of heating continues reducing sponge iron in pipeline enters body of heater, waste gas after burning enters atmosphere through chimney.The tail gas that makes the interior reduction of body of heater back produce is fully utilized, because the gas in the employing tail gas heating drum airduct has been saved the energy.A stem stem is arranged in body of heater, furnace charge has been reduced at the intravital relative thickness of stove, enter the furnace charge that the intravital gas of stove can be heated to nexine soon through blast orifice like this, furnace charge is heated evenly in body of heater, has improved the utilization ratio of heat, shortened the recovery time, recovery time is generally at 5～15 minutes, owing to improved the utilization ratio of heat effectively, also just reduced the consumption of coal, average sponge iron per ton consumes coal 400kg.Because at the body of heater middle part upper and lower two row's blast orifices are arranged, the hot gas that last blast orifice enters rises, tail gas is discharged through last venting port, return air in the formation upwards prolongs reduction section; The hot gas that following blast orifice enters, secondary combustion coal, furnace charge are in the decline process, and the CO of generation continues reduced iron, tail gas forms return air down through exhaust outlet discharge down, reduction section is prolonged, therefore downwards, prolonged the length of reduction section in the body of heater effectively, improved reduction ratio, reduction ratio reaches 98%.Be provided with step-down gear in discharging place, can adjust discharging speed according to actual needs at any time, make furnace charge fully reduction in body of heater.The invention can make full use of remaining tail gas in the body of heater, comes the heating drum airduct, and preheating gas has been saved the energy; Prolonged reduction section effectively, improved heat utilization ratio, the recovery time is shortened greatly, effectively improved plant factor, production cost is low.
Description of drawings
Fig. 1 is the structural representation of the invention;
Embodiment:, further specify the invention below in conjunction with accompanying drawing.
A kind of blast furnace of reducing sponge iron, comprise feeding unit 2, body of heater 27, discharge gate 17, feeding unit 2 is connected with body of heater 27 upper ends, venting port 21 on body of heater 27 upper end edge furnace body wall uniform distribution, at body of heater 27 middle parts along on the furnace body wall uniform distribution, two arrange blast orifices 12 down, venting port 14 under body of heater 27 lower end edge furnace body wall uniform distribution, a stem stem 7 is arranged in body of heater 27 inner chambers, body of heater 27 is connected with basis seat 16 with stem stem 7, body of heater 27 bottom uniform distribution discharge gates 17, discharge gate 17 passes basis seat 16 and stirs cage outlet 19 and be connected, and stirs cage and exports 19 and be connected with step-down gear 18; Last venting port 21 is connected with fly-ash separator 5 by pipeline 6 with following venting port 14, fly-ash separator 5 is connected with house steward 8, house steward 8 is connected with heating cabinet 24, blast pipe 9 is arranged in the heating cabinet 24, blast pipe 9 one ends are connected with gas blower 20, the other end passes heating cabinet 24 and is connected with gas-distributing pipe 23 by pipeline 6, and gas-distributing pipe 23 is connected with upper and lower two blast orifices 12.
Diffuse valve 22 and be connected with last venting port 21, when producing, close and diffuse valve 22, prevent that tail gas from entering atmosphere, when blast furnace need keep in repair, open and diffuse valve 22, emit the intravital tail gas of stove by pipeline 6.Heating cabinet is connected with chimney 25 by pipeline 6, and the waste gas after the heating cabinet internal combustion enters atmosphere through chimney.
Feeding unit 2 comprises pulley bracket 1, upper and lower two material handleless cups 3, and sealing plate 4, material handleless cup 3 flexibly connects by pulley bracket 1 and sealing plate 4.Disengaging and closure by material handleless cup 3 and sealing plate 4 enter in the body of heater furnace charge 13.
Body of heater 27 is made up of preheating section 10, reduction section 11 and cooling section 26, and the outer wall of cooling section 26 has a circle steel shell 15, and steel shell 15 forms a cavity with outer wall.When producing, annotate recirculated water in the cavity furnace charge is cooled off.
Claims (3)
1, a kind of blast furnace of reducing sponge iron, comprise feeding unit (2), body of heater (27), discharge gate (17), it is characterized in that feeding unit (2) is connected with body of heater (27) upper end, venting port (21) on body of heater (27) upper end edge furnace body wall uniform distribution, at body of heater (27) middle part along on the furnace body wall uniform distribution, two arrange blast orifices (12) down, venting port (14) under body of heater (27) lower end edge furnace body wall uniform distribution, in body of heater (27) inner chamber stem stem (7) is arranged, body of heater (27) is connected with basis seat (16) with stem stem (7), body of heater (27) bottom uniform distribution discharge gate (17), discharge gate (17) passes basis seat (16) and stirs cage outlet (19) and be connected, and stirs cage and exports (19) and be connected with step-down gear (18); The described venting port (21) of going up is connected with fly-ash separator (5) by pipeline (6) with following venting port (14), fly-ash separator (5) is connected with house steward (8), house steward (8) is connected with heating cabinet (24), blast pipe (9) is arranged in the heating cabinet (24), blast pipe (9) passes heating cabinet (24) and is connected with gas-distributing pipe (23) by pipeline (6), gas-distributing pipe (23) is connected with upper and lower two blast orifices (12), diffuses valve (22) and is connected with last venting port (21) by pipeline (6).
2, the blast furnace of reducing sponge iron according to claim 1, it is characterized in that described feeding unit (2) comprises pulley bracket (1), upper and lower two material handleless cups (3), sealing plate (4), material handleless cup (3) flexibly connects by pulley bracket (1) and sealing plate (4).
3, the blast furnace of reducing sponge iron according to claim 1 is characterized in that described body of heater (27) is made up of preheating section (10), reduction section (11) and cooling section (26), and the outer wall of described cooling section (26) has a circle steel shell (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101344030A CN100494409C (en) | 2006-11-29 | 2006-11-29 | Blast-furnace for reducing sponge iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101344030A CN100494409C (en) | 2006-11-29 | 2006-11-29 | Blast-furnace for reducing sponge iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1962880A CN1962880A (en) | 2007-05-16 |
| CN100494409C true CN100494409C (en) | 2009-06-03 |
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ID=38082106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101344030A Expired - Fee Related CN100494409C (en) | 2006-11-29 | 2006-11-29 | Blast-furnace for reducing sponge iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100494409C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4188022A (en) * | 1978-09-08 | 1980-02-12 | Midrex Corporation | Hot discharge direct reduction furnace |
| US4251267A (en) * | 1979-08-24 | 1981-02-17 | Midrex Corporation | Method for direct reduction of metal oxide to a hot metallized product in solid form |
-
2006
- 2006-11-29 CN CNB2006101344030A patent/CN100494409C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4188022A (en) * | 1978-09-08 | 1980-02-12 | Midrex Corporation | Hot discharge direct reduction furnace |
| US4251267A (en) * | 1979-08-24 | 1981-02-17 | Midrex Corporation | Method for direct reduction of metal oxide to a hot metallized product in solid form |
Non-Patent Citations (2)
| Title |
|---|
| 钙镁磷肥高炉料钟开闭装置. 黄鸿，江玉如.磷肥与复肥，第16卷第4期. 2001 |
| 钙镁磷肥高炉料钟开闭装置. 黄鸿，江玉如.磷肥与复肥，第16卷第4期. 2001 * |
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| Publication number | Publication date |
|---|---|
| CN1962880A (en) | 2007-05-16 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090603 Termination date: 20131129 |