CN201648414U - Ferruginous material jet reduction furnace - Google Patents
Ferruginous material jet reduction furnace Download PDFInfo
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- CN201648414U CN201648414U CN2010201441121U CN201020144112U CN201648414U CN 201648414 U CN201648414 U CN 201648414U CN 2010201441121 U CN2010201441121 U CN 2010201441121U CN 201020144112 U CN201020144112 U CN 201020144112U CN 201648414 U CN201648414 U CN 201648414U
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Abstract
The utility model relates to a ferruginous material jet reduction furnace, which comprises a gas-solid discharge tube, a jet furnace body, a reduction gas pipeline, an oxygen pipeline, a cyclone cooling exhaust pipe and a cyclone preheater material collecting barrel, wherein a jet material distribution device is arranged in the jet furnace body, the bottom is provided with a high-temperature reduction gas spray gun, an oxygen nozzle and a CO nozzle, the CO gas sprayed in by the CO nozzle preheats ferruginous material, and the combustion of the oxygen and a part of reduced gas increases the temperature in the furnace so as to make the reduction reaction smooth; and the jet material distribution device makes the ferruginous material be fully contacted with the reduction gas. The utility model has the advantages of good system stability, compact device arrangement, small ground occupation area, low investment cost, high production capacity, high metallization rate of the product and uniform quality.
Description
Technical field
The utility model relates to a kind of ferrous material injection reduction furnace, belongs to the gas-solid phase heat exchange field of ferrous metallurgy technology.
Background technology
In smelting iron and steel was produced, the reduction of ferrous material was to finish in reducing apparatus, and wherein key equipment is a reduction furnace.The existing many patent disclosures of prior art about the ferrous material reduction furnace, for example CN1075201 discloses a kind of circulating fluidized bed furnace for pre-reduction of fine iron ore, comprise round barrel shape first, two reduction furnaces and first, two separators, first pre-reducing furnace is connected to second pre-reducing furnace by second circulation tube that is formed with the gas supply opening, second pre-reducing furnace is by being formed with the gas supply opening and the 3rd circulation tube is connected to first cyclonic separator, in/the particulate iron ore is because first, the reducing gas that two pre-reducing furnaces converge and form high-velocity fluidized bed and circulate at this, by first circulation tube first separator and first pre-reducing furnace are interconnected, the funnel and second cyclonic separator are connected on first circulation tube.
CN1176666, CN1211283 and CN1143391 disclose the device of three-stage fluidized bed furnace type of reducing fine iron ore, comprise first single fluidized-bed, dry/preheat fine iron ore in the boiling fluidized state, first swirler, collection is clipped in the fine iron ore in first furnace gases, the second single current pool furnace, prereduction is from the fine iron ore of first stove, second swirler, collection is clipped in the fine iron ore in second furnace gases, the 3rd double-fluidized-bed stove, it comprises last respectively reduction coarse particles and medium/fine grain first Reaktionsofen and second Reaktionsofen, the 3rd swirler and the 4th swirler, collection is clipped in from first respectively, fine iron ore particle in the second Reaktionsofen furnace gases.CN1142248 discloses the method for the fine iron ore of three stage fluidized bed type reduction apparatuss and reduction wide ranges thereof.This equipment comprises the drying/preheating oven that has the first coupled tornado dust collector that series is arranged, have the elementary pre-reducing furnace of the second coupled cyclone dust removal, coarse grain ore in the whole reducing iron ore under the boiling fluidization, shift the high gas velocity reduction furnace of secondary of the medium/smitham in this ore, whole reduction this medium/smitham simultaneously, form the 3rd tornado dust collector that its fluidizing fluid-bed secondary hangs down inner tornado dust collector in the gas velocity reduction furnace and catches not the fine ore of being caught by inner cyclone dust removal.
CN1034022 discloses a kind of prereduction and smelting reduction stove of solid-state ore.The large-size ore is reduced in pre-reducing furnace at formation fluidized-bed on the divider, at the smelting reduction stove of packing into.The ore of reduced size is reduced when passing pre-reducing furnace, is sprayed in the smelting reduction stove then and melts.CN1248632 discloses a kind of coal hydrogen reduction iron smelting method to carry out in reduction shaft furnace and whole reduced iron liquid furnace.With the ferrous material is raw material, is the energy and reductive agent with the coal.Medium reduction degree is adopted in prereduction, and the degree of metalization of prereduction is 50-80%, and concentration 〉=85% of low post-combustion rate CO+H2+CO2+H2O is adopted in reduction eventually.Make in the whole reduction process, indirect reduction and direct reductive ratio were near theoretical optimal value 7: 3.
CN85104511 discloses at one to be had gasifier and is placed in the device of the direct reduction shaft furnace above it, shaft furnace connects vertical tube by one and links to each other with gasifier, the reducing gas of obtaining in the gasifier is directly introduced, even when having height to contain gray scale, also can be accomplished.The method that CN1035136 discloses a kind of smelting and rducing iron ores comprises introduces preheating and pre-reducing furnace and preheating and pre-reduced iron ore with iron ore, the prereduction degree is lower than 30%, ore, carbonaceous material and fusing assistant are dropped into fusion reducing furnace, with placing the decarburization nozzle at oxygen lance top and subsequent combustion mouth that oxygen is blown into fusion reducing furnace.More than the restriction of disclosed relevant device and technology bonded, exist degree of metalization low, the energy consumption height, production efficiency is low, problems such as cost height.
CN101445851A discloses a kind of ferrous material suspended reduction device, mentions the injection reduction stove in this device, but does not disclose the concrete structure of injection reduction stove.
Summary of the invention
Problem in view of above-mentioned prior art existence, the utility model provides a kind of ferrous material injection reduction furnace, be used for being installed in ferrous material suspended reduction device, ferrous material suspended reduction device is referring to prior art, as CN101445851A, be the nucleus equipment of ferrous material suspended reduction device and ferrous material suspended secondary fast reduction device.
Technical solutions of the utility model are as follows:
Explanation of nouns: and stream, promptly the ferrous material micro mist is suspended in the high temperature reduction gas, flows to a direction.
A kind of ferrous material injection reduction furnace comprises the gas-solid discharge nozzle, sprays body of heater, reducing gas pipeline, oxygen channel, cooling cyclone vapor pipe and cyclone preheater aggregate tube; Wherein spraying body of heater inside, be respectively the suspended reduction district from top to bottom, eddy current reduction zone and jet flow temperature adjustment district, be provided with the barrier of a band blast cap between eddy current reduction zone and the injection temperature adjustment district, in the eddy current reduction zone, be provided with the injection distribution device, bottom in jet flow temperature adjustment district is provided with the high temperature reduction gas spray gun, oxygen jet and CO nozzle, the high temperature reduction gas spray gun is arranged on above the reducing gas pipe, oxygen jet is arranged on above the oxygen hose, the reducing gas pipe links to each other with the reducing gas pipeline, oxygen hose links to each other with oxygen channel, and the CO nozzle links to each other with the cooling cyclone vapor pipe; The gas-solid discharge nozzle links to each other with the suspended reduction district on the top of spraying body of heater, and cyclone preheater aggregate tube and reducing gas lateral link to each other with the injection distribution device that is provided with in the eddy current reduction zone respectively.High temperature reduction gas spray gun, oxygen jet and CO nozzle have been adopted in design herein, and adopt the mode of spraying to carry out work, not only can be used to from the CO of cooling cyclone vapor pipe gas preheating ferrous material, and oxygen and partial reduction gas and CO gaseous combustion, can promote the temperature in the injection reduction stove rapidly; High temperature reduction gas spray gun, oxygen jet and CO nozzle all are arranged on the Lower Half of spraying body of heater, adopt upwards and spray, also for gas-solid mutually and stream dynamic conditions is provided, ferrous material in the injection reduction stove by rapid heating and fast restore, improve thermal reduction efficient, thereby can obtain the prereduction ferrous material product of high degree of metalization.
Preferably, described reducing gas pipe is a ring pipe.
Preferably, described oxygen hose is a ring pipe.
Preferably, on the described reducing gas pipe 3～12 high temperature reduction gas spray guns are set; 3～6 oxygen jets are set on the described oxygen hose.Design herein can be provided with a plurality of high temperature reduction gas spray guns and oxygen jet respectively according to different production needs on reducing gas pipe and oxygen hose.
Preferably, described reducing gas ring pipe is provided with two in the injection reduction body of heater, lay respectively at outer ring and inner ring, and the circular diameter of reducing gas pipe that is positioned at the outer ring is greater than the outside diameter of the reducing gas pipe that is positioned at inner ring.Design herein increases the density that reducing gas sprays into, and increases the power of gas-solid two-phase and stream, makes the ferrous material reduction more even.
Described injection distribution device comprises feeding mouth, material decollator and reducing gas cloth nozzle; Feeding mouth is positioned at the top of reducing gas cloth nozzle, and feeding mouth and reducing gas cloth nozzle are arranged in the material decollator; The feeding mouth that sprays in the distribution device links to each other with the cyclone preheater aggregate tube; The reducing gas cloth nozzle that sprays distribution device links to each other with the reducing gas lateral, is provided with switch between reducing gas cloth nozzle and the reducing gas lateral.She Ji advantage herein: in ferrous material injection reduction furnace: gas, solid two-phase are upwards and stream, make gas-solid two-phase full contact, increase heat transfer, mass transfer coefficient, after the ferrous material micro mist enters the material decollator by feeding mouth, the reducing gas that reducing gas cloth nozzle sprays into sprays into the vortex reduction zone with the ferrous material micro mist equably from the material decollator, make the ferrous material homodisperse and with fast fully reaction of reducing gas, thereby improved the rate of reduction of ferrous material.
Advantage of the present utility model is embodied in:
1) owing to gas in ferrous material injection reduction furnace, solid two-phase make progress and stream, gas-solid two-phase full contact conducts heat, mass transfer coefficient is big, for ferrous material conducts heat and reduction provides sufficient dynamic conditions, make ferrous material be able to rapid heating and reduction, rate of drying is fast.
2) from the CO gas of the band certain temperature of cooling cyclone, link to each other with the CO nozzle through the cooling cyclone vapor pipe, finally spray into and spray the temperature adjustment district by the CO nozzle, CO gas not only can the preheating ferrous material but also can also be produced a large amount of heat with oxygen combustion, increase the temperature in the injection reduction stove, for the reduction reaction of ferrous material provides necessary temperature basis, say that therefore this technology not only reduces the energy consumption of system and improved reduction efficiency but also improved the degree of metalization of system thermal efficiency and ferrous material.
3) improved the degree of metalization of system thermal efficiency and ferrous material, the degree of metalization height can be controlled in 70～90%.
4) ferrous material injection reduction furnace, system stability is good, and equipment is settled compact, and floor space is little, and investment cost is few, the throughput height, resultant metal rate height, quality is even.
Description of drawings
Fig. 1 is a synoptic diagram of the present utility model.
Fig. 2 is the vertical view of the reducing gas pipe that has the high temperature reduction gas spray gun, the oxygen hose that has oxygen jet and CO nozzle among the embodiment 1 of the present utility model.
Fig. 3 is reducing gas pipe that has the high temperature reduction gas spray gun among the embodiment 1 of the present utility model and the oxygen hose side-view that has oxygen jet.
Fig. 4 is the vertical view of the reducing gas pipe that has the high temperature reduction gas spray gun, the oxygen hose that has oxygen jet and the CO nozzle of the utility model embodiment 2.
Wherein 1, spray body of heater; 2, cyclone preheater aggregate tube; 3, feeding mouth; 4, material decollator; 5, reducing gas cloth nozzle; 6, reducing gas lateral; 7, switch; 8, reducing gas pipeline; 9, high temperature reduction gas spray gun; 10, oxygen channel; 11, oxygen jet; 12, cooling cyclone vapor pipe; 13, jet flow temperature adjustment district; 14, barrier; 15, blast cap; 16, vortex reduction zone; 17, suspended reduction district; 18, gas-solid discharge nozzle; 19, CO nozzle; 20, reducing gas pipe; 21, oxygen hose.
Embodiment
Following examples are to further specify of the present utility model, but the utility model is not limited thereto.
Embodiment 1:
As Figure 1-3, ferrous material injection reduction furnace is installed in the ferrous material suspended reduction device, ferrous material suspended reduction device is referring to CN101445851A, wherein three grades of cyclone preheaters link to each other with cyclone preheater aggregate tube 2, the discharge end of gas-solid discharge nozzle 18 links to each other with cyclonic separator in the ferrous material suspended reduction device, and the inlet mouth of CO nozzle 19 links to each other with cooling cyclone vapor pipe 12.
Ferrous material injection reduction furnace, it comprises gas-solid discharge nozzle 18, sprays body of heater 1, reducing gas pipeline 8, oxygen channel 10, cooling cyclone vapor pipe 12, cyclone preheater aggregate tube 2; Wherein spraying body of heater 1 inside, be respectively suspended reduction district 17 from top to bottom, eddy current reduction zone 16 and jet flow temperature adjustment district 13, the barrier 14 of a band blast cap 15 is set between eddy current reduction zone 16 and the injection temperature adjustment district 13, in eddy current reduction zone 16, be provided with the injection distribution device, bottom in jet flow temperature adjustment district 13 is provided with high temperature reduction gas spray gun 9, oxygen jet 11 and CO nozzle 19, high temperature reduction gas spray gun 9 is arranged on above the reducing gas pipe 20, oxygen jet 11 is arranged on above the oxygen hose 21, reducing gas pipe 20 links to each other with reducing gas pipeline 8, oxygen hose 21 links to each other with oxygen channel 10, and CO nozzle 19 links to each other with cooling cyclone vapor pipe 12; Gas-solid discharge nozzle 18 links to each other with the suspended reduction district 17 on the top of spraying body of heater 1, and cyclone preheater aggregate tube 2 links to each other with the injection distribution device of setting in the eddy current reduction zone 16 respectively with reducing gas lateral 6.
Reducing gas pipe 20 and oxygen hose 21 are ring pipe.
4 high temperature reduction gas spray guns 9 are set on the described reducing gas pipe 20; 3 oxygen jets 11 are set on the described oxygen hose 21.
Spray distribution device and comprise feeding mouth 3, material decollator 4 and reducing gas cloth nozzle 5; Feeding mouth 3 is positioned at the top of reducing gas cloth nozzle 5, and feeding mouth 3 and reducing gas cloth nozzle 5 are arranged in the material decollator 4; The feeding mouth 3 that sprays in the distribution device links to each other with cyclone preheater aggregate tube 2; The reducing gas cloth nozzle 5 that sprays distribution device links to each other with reducing gas lateral 6, is provided with switch 7 between reducing gas cloth nozzle 5 and the lateral 6.
Working process:
Ferrous material: iron ore micro mist; Reducing gas: coal gas takes place.
Ferrous material injection reduction furnace, as Figure 1-3: 750 ℃ of high temperature generation coal gas sprays into jet flow temperature adjustment district 13 by high temperature reduction gas spray gun 9 with the speed (adjustable) of 4-15 meter per second, finally spray into jet flow temperature adjustment district 13 with the speed of 4-10 meter per second from 400 ℃ CO gas of cooling cyclone through cooling cyclone vapor pipe 12 by CO nozzle 19, system controls oxygen jet 11 automatically and sprays into oxygen to jet flow temperature adjustment district 13, an amount of generation coal gas and CO gas and oxygen combustion produce heat, make the reducing gas temperature in jet flow temperature adjustment district rise to 750 ℃ ± 5 ℃, high temperature reduction gas sprays into vortex reduction zone 16 by blast cap 15 with the speed of 3-12 meter per second.
The granularity scope is a 1-40 micron iron ore micro mist at three grades of cyclone preheaters of ferrous material suspended reduction device by part prereduction and be preheating to 650 ℃, then through cyclone preheater aggregate tube 2 and feeding mouth 3, finally enter material decollator 4,750 ℃ of degree high temperature generation coal gas evenly spray vortex reduction zone 16 with ferrous material micro mist in the material decollator 4 by material decollator 4 simultaneously by 5 ejections of reducing gas cloth nozzle.
The ferrous material micro mist is heated to 700 ℃ ± 5 ℃ and arrives suspended reduction district 17 in vortex reduction zone 16, enter gas-solid discharge nozzle 18 then, enter cyclonic separator in the ferrous material suspended reduction device through gas-solid discharge nozzle 18, it is 70%～90% prereduction ferrous material micro mist that final production goes out degree of metalization.
Embodiment 2:
As shown in Figure 4, two reducing gas pipes 20 are set in injection reduction body of heater 1, be ring pipe, lay respectively at outer ring and inner ring, the circular diameter of reducing gas pipe that is positioned at the outer ring is greater than the outside diameter of the reducing gas pipe that is positioned at inner ring, be provided with 6 high temperature reduction gas spray guns above the inner ring reducing gas pipe, be provided with 7 high temperature reduction gas spray guns above the reducing gas pipe of outer ring.Other are with embodiment 1.
Claims (6)
1. a ferrous material injection reduction furnace is characterized in that, comprises the gas-solid discharge nozzle, sprays body of heater, reducing gas pipeline, oxygen channel, cooling cyclone vapor pipe, cyclone preheater aggregate tube; Wherein spraying body of heater inside, be respectively the suspended reduction district from top to bottom, eddy current reduction zone and jet flow temperature adjustment district, be provided with the barrier of a band blast cap between eddy current reduction zone and the injection temperature adjustment district, in the eddy current reduction zone, be provided with the injection distribution device, bottom in jet flow temperature adjustment district is provided with the high temperature reduction gas spray gun, oxygen jet and CO nozzle, the high temperature reduction gas spray gun is arranged on above the reducing gas pipe, oxygen jet is arranged on above the oxygen hose, the reducing gas pipe links to each other with the reducing gas pipeline, oxygen hose links to each other with oxygen channel, and the CO nozzle links to each other with the cooling cyclone vapor pipe; The gas-solid discharge nozzle links to each other with the suspended reduction district on the top of spraying body of heater, and cyclone preheater aggregate tube and reducing gas lateral link to each other with the injection distribution device that is provided with in the eddy current reduction zone respectively.
2. ferrous material injection reduction furnace according to claim 1 is characterized in that, described reducing gas pipe is a ring pipe.
3. ferrous material injection reduction furnace according to claim 1 is characterized in that, described oxygen hose is a ring pipe.
4. ferrous material injection reduction furnace according to claim 1 is characterized in that, 3～12 high temperature reduction gas spray guns are set on the described reducing gas pipe; 3～6 oxygen jets are set on the described oxygen hose.
5. ferrous material injection reduction furnace according to claim 2, it is characterized in that, described reducing gas pipe is provided with two in the injection reduction body of heater, lay respectively at outer ring and inner ring, and the circular diameter of reducing gas pipe that is positioned at the outer ring is greater than the outside diameter of the reducing gas pipe that is positioned at inner ring.
6. ferrous material injection reduction furnace according to claim 1 is characterized in that, described injection distribution device comprises feeding mouth, material decollator and reducing gas cloth nozzle; Feeding mouth is positioned at the top of reducing gas cloth nozzle, and feeding mouth and reducing gas cloth nozzle are arranged in the material decollator; The feeding mouth that sprays in the distribution device links to each other with the cyclone preheater aggregate tube; The reducing gas cloth nozzle that sprays distribution device links to each other with the reducing gas lateral, is provided with switch between reducing gas cloth nozzle and the reducing gas lateral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201441121U CN201648414U (en) | 2010-03-30 | 2010-03-30 | Ferruginous material jet reduction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201441121U CN201648414U (en) | 2010-03-30 | 2010-03-30 | Ferruginous material jet reduction furnace |
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| Publication Number | Publication Date |
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| CN201648414U true CN201648414U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201441121U Expired - Lifetime CN201648414U (en) | 2010-03-30 | 2010-03-30 | Ferruginous material jet reduction furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792840A (en) * | 2010-03-30 | 2010-08-04 | 莱芜钢铁集团有限公司 | Ferrous material injection reduction furnace and ferrous material injection reduction process |
| CN106693874A (en) * | 2016-12-12 | 2017-05-24 | 北京神雾环境能源科技集团股份有限公司 | Reducing reaction device |
| CN111996389A (en) * | 2020-08-28 | 2020-11-27 | 刘会正 | Side-blown reduction furnace |
-
2010
- 2010-03-30 CN CN2010201441121U patent/CN201648414U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792840A (en) * | 2010-03-30 | 2010-08-04 | 莱芜钢铁集团有限公司 | Ferrous material injection reduction furnace and ferrous material injection reduction process |
| CN106693874A (en) * | 2016-12-12 | 2017-05-24 | 北京神雾环境能源科技集团股份有限公司 | Reducing reaction device |
| CN111996389A (en) * | 2020-08-28 | 2020-11-27 | 刘会正 | Side-blown reduction furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101124 Effective date of abandoning: 20120208 |