CN101775455B - Iron reduction device - Google Patents
Iron reduction device Download PDFInfo
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- CN101775455B CN101775455B CN2010100333567A CN201010033356A CN101775455B CN 101775455 B CN101775455 B CN 101775455B CN 2010100333567 A CN2010100333567 A CN 2010100333567A CN 201010033356 A CN201010033356 A CN 201010033356A CN 101775455 B CN101775455 B CN 101775455B
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Abstract
The invention provides an iron reduction device which comprises a reduction furnace, a regenerator, a burning chamber, and a supporting pipe and a valve. The device also comprises a gas generator, a gas tank and a heat exchanger. The gas generator is respectively connected with the inlet of the gas tank and the regenerator, and the outlet of the gas tank is connected with the burner of the burning chamber. The bottom of the reduction furnace is provided with a diversion wall, and gas holes on both sides of the diversion wall are connected with the burning wall. Through the added gas generator, some CO2 with heat is converted into gas, and then the gas is burned to supply a heat source to reduction reaction, heat energy is fully used, thereby facilitating environment protection. The diversion wall is arranged in the reduction furnace, thereby preventing the short-circuit phenomenon of high-temperature gas flow in the furnace so that the gas and reduced material fully contact, improving the conditions of the iron reduction reaction, the working efficiency and the product quality.
Description
Technical field
The present invention relates to a kind of device of reduction iron production, be specifically related to a kind of device that has the heat accumulating type reduction iron production of coal-gas producer.
Background technology
Fused reduction iron-smelting is the important component part of Iron and Steel Production, its principal feature is as the disposable energy and reductive agent with mill coal, the oxide compound of iron is reduced under molten state, have briquet replacing coke, flow process is short, environmental pollution is little, construction investment is few, advantages such as production cost is low, by extensively good in the industry field, the iron and steel enterprise of various countries competitively researchs and develops.The method of existing reduction iron production mainly contains COREX method (CN1010323B), DIOS method (CN1035136A), HISELT method (CN1037542A).COREX method suitability for industrialized production wherein, other two kinds of methods are still under test.But all reduction iron production technology, since aspects such as energy consumption height, production cost height, difficult and blast furnace technology competition.
Granted publication number is that the Chinese patent of CN2697565Y discloses a kind of " electric-arc furnace steelmaking continuous charging scrap preheater ", its electric arc furnace is made of body of heater and electrode, its continuous charging steel scrap preliminary heating device is made up of preheating channel, water-cooled feeding trough etc., high-temperature flue gas in the electric arc furnace and the raw material in the preheating channel directly carry out heat exchange, can improve the preheating temperature of charging, save the energy.But this method is only utilized the sensible heat in the flue gas, can't utilize the chemical energy of the CO that produces in the steelmaking process.
The applicant provides " a kind of method and apparatus of smelting iron in arc furnace " at application number for 2008100799930.5 application for a patent for invention, include body of heater, bell, electrode, feeding equipment and discharging equipment, device also comprises at least one pair of combustion chamber and at least one pair of thermophore, the combustion chamber is connected with the body of heater of electric arc furnace by Link Port, one end of thermophore is connected with the combustion chamber, and the other end is connected with blowdown system, blower fan and gas treatment equipment respectively.This application for a patent for invention makes full use of the bubbing that smelting reduction process produces, and makes the heat storage in the bubbing burning heating thermophore, by gas circulation heat is brought in the body of heater from thermophore again, makes waste heat obtain utilizing.But because the bubbing amount is big, still very high with the heat of discharging behind the heat storage in the heat heating thermophore of burning bubbing generation, cause energy not make full use of.In addition, high-temperature gas enters reduction furnace from both sides, and gas is walked short circuit in stove, and the dead band is arranged in the body of heater, and the material heating is inhomogeneous, influences reduction effect and quality product.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the invention provides a kind of device of reduction iron production, make a part have the CO of heat
2Be converted into coal gas, provide thermal source with gas-fired for reduction reaction again, make full use of heat energy, in reduction furnace, install parallel works simultaneously, reducing gas is fully contacted with reduced material in reduction furnace.
The device of reduction iron production provided by the invention comprises reduction furnace, thermophore and combustion chamber and pipeline that matches and valve, and an end of thermophore is connected with reduction furnace through the combustion chamber.Device also includes coal-gas producer, gas holder and interchanger.Coal-gas producer is connected with thermophore with the inlet of gas holder respectively, and the outlet of gas holder is connected to the burner of combustion chamber, and interchanger is positioned at the export pipeline of thermophore, and the outlet of interchanger preheated air is connected to burner.The bottom of reduction furnace is provided with training wall, and reduction furnace is connected with the combustion chamber by the pore of training wall both sides.
Coal-gas producer or selection are installed in the thermophore.As selection, be provided with the twice training wall with partition wall in the body of reduction furnace road, training wall and partition wall are divided into three parts with reduction furnace, and the reduction furnace wall of partition wall both sides relative position is provided with pore, is connected with the combustion chamber by the pore reduction furnace.Another is chosen as, and reduction furnace is a rectangle, and the reduction furnace wall of training wall both sides is provided with 2～50 pores, is connected with the combustion chamber by the pore reduction furnace.Training wall is a pyramidal structure, and the height of training wall is 20%～50% of a body of heater height.Training wall is the fire-resistant brickwork construction of fire-resistant brickwork construction or water-cooled interlayer.
Be continuous production,, easy for removal and installation between reduction furnace and the combustion chamber for flange connects.Heat storage is ceramic refractory or ferrous materials, heat storage be shaped as spherule, cuboid or cellular polyhedron, do not get rid of the heat storage of other material and shape.Reduction furnace is an electrical heater, electric arc furnace, electromagnetic induction furnace, electroslag furnace, electroslag furnace or ion stove, or the combination between the above-mentioned type of furnace, and the reduction furnace that uses other form also is protection scope of the present invention.Interchanger is a recuperative heat exchanger.
Compared with the prior art, advantage of the present invention is: 1. device has been installed coal-gas producer, will have the CO of surplus heat
2Be converted into coal gas through coal-gas producer, acting as a fuel offers combustion chambers burn, has both saved the energy, reduces greenhouse gas emission again, helps environment protection.2. set up training wall in the reduction furnace, realized the even heating of material in the reduction furnace, avoided high temperature gas flow in stove, to walk short circuit phenomenon, increased the intensity of high-temperature gas and material transmission of heat by convection, gas is fully contacted with reduced material, improve the condition of reduction iron production reaction, improved working efficiency and quality product.3. the fume emission pipeline adds interchanger, utilizes the waste heat warm-up combustion-supporting air of flue gas, and heat is fully utilized, further save energy, the cost of reduction reduction iron production.4. flange connects between reduction furnace and the combustion chamber, is convenient to remove and install, and a stove is changed another stove after finishing, and proceeds operation, helps serialization production.
Description of drawings
Fig. 1 is the device schematic flow sheet of reduction iron production of the present invention;
The device schematic flow sheet of Fig. 2 another program reduction iron production of the present invention.
Fig. 3 is the reduction furnace diagrammatic cross-section that is provided with training wall;
Fig. 4 is the reduction furnace vertical view that is provided with training wall.
Fig. 5 is the reduction furnace another program synoptic diagram that is provided with training wall;
Fig. 6 is the reduction furnace third party case synoptic diagram that is provided with training wall;
Wherein:
1-interchanger, 2-coal-gas producer, 3-thermophore, 4-combustion chamber, 5-gas holder, 6-burner, 7-reduction furnace, 8-valve, 9-training wall, 10-pore, 11-partition wall, 12-heat storage.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Embodiment 1
The device of reduction iron production of the present invention is made up of reduction furnace 7, thermophore 3, combustion chamber 4, producer gas generator 2, interchanger 1, gas holder 5 and the pipeline that matches and valve as shown in Figure 1.The combustion chamber is provided with burner 6, and heat storage 12 is housed in the thermophore, and heat storage is ceramic spherule.Thermophore, combustion chamber, coal-gas producer and interchanger constitute gas processing device, and two groups of gas processing devices are installed in the both sides of reduction furnace respectively.One end of thermophore is connected with reduction furnace through the combustion chamber, and the connecting portion of combustion chamber and reduction furnace is provided with flange, and the combustion chamber is that flange is connected with reduction furnace, is convenient to remove and install.The other end of thermophore is divided into two-way, and one the tunnel is connected with airline, and another road is connected to the fume emission pipeline by interchanger.Interchanger is a recuperative heat exchanger, and another journey of interchanger is an airline, with useless smoke pre-heating combustion air.The centre exit of thermophore is connected to coal-gas producer, and the outlet of coal-gas producer is connected to gas holder 5, and the gas exit of gas holder is connected to the burner 6 of combustion chamber.The airline of interchanger 1 is connected to burner 6.As shown in Figure 3, Figure 4, reduction furnace 7 is columnar structured, and the centre is provided with training wall 9, the height of training wall be reduction furnace high 50%, training wall is fire-resistant brickwork construction.The reduction furnace wall of training wall both sides relative position is respectively equipped with pore 10, and pore is the passage between combustion chamber and the reduction furnace.Airline that links to each other with thermophore and flue gas pipeline are provided with valve 8, and the pipeline that thermophore is connected with coal-gas producer is provided with valve with the pipeline that gas holder is connected with burner.
The process of reduction iron production of the present invention is, reduced material and reductive agent are inserted in the reduction furnace 7, the combustion chambers burn that fuel gas enters the left side by gas holder 5 through burner 6, the airline in air process valve 8, left side enters the thermophore in left side, and it is combustion-supporting to enter the combustion chamber through thermophore again.The pore 10 of high-temperature flue gas through the left side that burning produces sprays into reduction furnace 7 internal heating materials.Because the effect of blocking of training wall in the reduction furnace, high-temperature flue gas flows from bottom to top along training wall and heats material in the burner hearth of the left side, enter the right side burner hearth through stove internal upper part space again, flow downward along burner hearth on the right then and discharge from the right side pore after adding thermal material, realize the material even heating in the reduction furnace, avoided the short circuit phenomenon of high temperature gas flow in stove.The inflammable gass such as CO that reduction process produced in the reduction furnace expellant gas contained, enter the combustion chamber on right side, air through interchanger 1 preheating carries out combustion-supporting burning by the combustion chamber that burner 6 enters the right side, high-temperature flue gas after the burning is through the right side thermophore, with 12 heating of the heat storage in the thermophore of right side, waste gas leaves thermophore and arrive blowdown system after interchanger 1 and combustion air heat exchange, and the temperature of exhaust gas discharged is reduced to below 150 ℃.After the waste gas of discharging from the right side flue gas pipeline reaches the setting fixed temperature, system's commutation work, coal gas enters the burner combustion of combustion chamber, right side, air enters the thermophore on right side through the airline on valve 8, right side, heat storage is emitted the heat preheated air in the thermophore, and the air admission combustion chamber after the preheating is combustion-supporting.The pore 10 of high-temperature flue gas through the right side that burning produces sprays into reduction furnace 7 internal heating materials.The waste gas that adds behind the thermal material feeds the combustion chamber, left side, inflammable gas 4 burnings in the same waste gas in the combustion chamber, left side, the heat storage in the high-temperature flue gas heating left side thermophore of generation, then after interchanger 1 and combustion air heat exchange to the blowdown system discharging.Both sides like this gas processing device alternate run, whole process are realized automated operation by valve event.
Regenerator temperature in the thermophore can raise gradually with the carrying out that produces, when regenerator temperature is too high, open thermophore centre exit valve, part high-temperature flue gas in the heat storage is sent into coal-gas producer 2, and the gasification reaction that carbon takes place in coal-gas producer the carbonic acid gas in the high-temperature flue gas generates coal gas (CO, H
2), coal gas is delivered to gas holder by pipeline, and gas holder provides fuel for firing system.
After the material in the reduction furnace is heated to the temperature of requirement, open the joint flange of reduction furnace and both sides, with a pair of water-cooled heatproof cover plate two flanges are blocked up, reduction furnace moves to arc melting workshop section through handling equipment, insert electrode from the bell electrode jack and carry out melting, the molten iron that produces is through desulfurization, and the iron notch by the reduction furnace bottom after the technologies such as decarburization flows out, and the inflammable gas that produces in the electrically heated process is delivered to gas tank by pipeline and stores.Simultaneously, another reduction furnace is placed in reducing apparatus, and connect the gas communication pipeline and seal with flange, two or more in this way reduction furnaces hocket gas heating reduction and electrically heated melting, realization fused reduction iron-smelting process is carried out continuously.
Embodiment 2
Another embodiment of the present invention as shown in Figure 2, coal-gas producer 2 is inlayed and is installed in the thermophore 3.As shown in Figure 5, described reduction furnace 7 is columnar structured, be provided with twice training wall 9 in the body of heater with partition wall 11, training wall and partition wall are divided into three parts with reduction furnace, the reduction furnace wall of partition wall both sides relative position is provided with pore 10, is communicated with gas processing device (comprising combustion chamber, thermophore, coal-gas producer and interchanger) by pore 10 reduction furnaces.The height of training wall be the reduction furnace stove high 40%, be fire-resistant brickwork construction.Partition wall is from the furnace bottom to the furnace roof, is built into refractory brick.This kind structure is in order to strengthen the intensity that gas conducts heat in body of heater, further to improve the working condition of reduction iron production.It is operating as: high-temperature gas enters a chamber the body of heater from the pore 10 of a side, material in the heating a chamber, air-flow flows from bottom to top along training wall and arrives the b chamber, material in the heating b chamber, enter the c chamber along another training wall again, discharge from the pore of opposite side behind the material in the heating c chamber and go to the rear portion gas processing device.With the gas processing device switch operation, reduction furnace commutation operation, high-temperature gas enters the c chamber from the pore of c chamber side and adds thermal material, arrive the b chamber through training wall, add thermal material in the b chamber after training wall to a chamber, pore from this side after a chamber adds thermal material leaves body of heater to gas processing device, whole process alternate run.The miscellaneous equipment of present embodiment and operation are identical with embodiment 1, repeat no more.
Embodiment 3
The third embodiment of the present invention shows that as figure institute 6 described reduction furnace 7 is a rectangular box shape body structure, is provided with training wall 9 at the bottom of the orthogonal reduction furnace, and the height of training wall is 45% of a reduction furnace height, is fire-resistant brickwork construction.Be respectively equipped with 10 pores 10 on the furnace wall of training wall both sides.Device is provided with two cover gas processing devices, is set in the both sides of reduction furnace respectively.Its operating process is, 10 pores 10 of high-temperature flue gas through the left side enter the reduction furnace heating by this reduction material of side, carry out the reduction iron production reaction, gas heats this side material in the burner hearth heating back in left side along the burner hearth that training wall enters the right side, and the pore 10 of gas through the right side leaves body of heater and enter gas processing device then.With the gas processing device switch operation, reduction furnace commutation operation, high-temperature flue gas enters the reduced material that body of heater heats this wing furnace thorax from the pore on right side, and the burner hearth of gas along training wall 9 to the left side heats, and leaves reduction furnace from the pore 10 in left side then and enters gas processing device.Miscellaneous equipment and operation are identical with embodiment 1.
Claims (10)
1. the device of a reduction iron production, comprise reduction furnace (7), thermophore (3) and combustion chamber (4) and pipeline that matches and valve, one end of described thermophore is connected with reduction furnace through the combustion chamber, it is characterized in that: described device also includes coal-gas producer (2), gas holder (5) and interchanger (1), described coal-gas producer respectively with the inlet of gas holder be connected with thermophore, the outlet of gas holder is connected to the burner (6) of combustion chamber, described interchanger is positioned at the export pipeline of thermophore, and the preheated air outlet of interchanger is connected to burner; The bottom of described reduction furnace (7) is provided with training wall (9), and reduction furnace is connected with the combustion chamber by the pore (10) of training wall both sides.
2. according to the device of the described reduction iron production of claim 1, it is characterized in that: be provided with twice training wall (9) and partition wall (11) together in the described reduction furnace body of heater, training wall and partition wall (11) are divided into three parts with reduction furnace, and the reduction furnace wall of partition wall both sides relative position is provided with pore.
3. according to the device of the described reduction iron production of claim 1, it is characterized in that: described reduction furnace is a rectangle, and the reduction furnace wall of described training wall both sides is provided with 2～50 pores.
4. according to the device of each described reduction iron production of claim 1～3, it is characterized in that: described training wall is a pyramidal structure, and the height of training wall (9) is 10%～60% of a body of heater height.
5. according to the device of the described reduction iron production of claim 4, it is characterized in that: described training wall is fire-resistant brickwork construction.
6. according to the device of the described reduction iron production of claim 1, it is characterized in that: described coal-gas producer is installed in the thermophore (3).
7. according to the device of the described reduction iron production of claim 1, it is characterized in that: connect for flange between described reduction furnace and the combustion chamber.
8. according to the device of the described reduction iron production of claim 1, it is characterized in that: the heat storage in the described thermophore (12) is ceramic refractory or ferrous materials; Described heat storage be shaped as spherule, cuboid or cellular polyhedron.
9. according to the device of the described reduction iron production of claim 1, it is characterized in that: described reduction furnace (7) is an electrical heater, electric arc furnace, electromagnetic induction furnace, electroslag furnace or plasma heating furnace, or the combination between the above-mentioned type of furnace.
10. according to the device of the described reduction iron production of claim 1, it is characterized in that: described interchanger (1) is a recuperative heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100333567A CN101775455B (en) | 2010-01-12 | 2010-01-12 | Iron reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100333567A CN101775455B (en) | 2010-01-12 | 2010-01-12 | Iron reduction device |
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| CN101775455A CN101775455A (en) | 2010-07-14 |
| CN101775455B true CN101775455B (en) | 2011-08-17 |
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| CN2010100333567A Active CN101775455B (en) | 2010-01-12 | 2010-01-12 | Iron reduction device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102679141B (en) * | 2012-05-23 | 2014-06-18 | 首钢京唐钢铁联合有限责任公司 | Converter coal gas cabinet inlet structure with flow guide device |
| CN112210636A (en) * | 2020-10-09 | 2021-01-12 | 新疆八一钢铁股份有限公司 | Device for strengthening central gas flow of reduction furnace of Ou metallurgical furnace |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6379422B1 (en) * | 1999-08-05 | 2002-04-30 | Technological Resources Pty. Ltd. | Direct smelting process |
| CN1504582A (en) * | 2002-12-03 | 2004-06-16 | 中国科学院过程工程研究所 | Gas base reduction iron-smelting method and apparatus |
| CN1789870A (en) * | 2005-12-23 | 2006-06-21 | 济南济钢设计院 | Pelletizing shaft furnace with smooth descent and diversion functions |
| CN201292373Y (en) * | 2008-10-29 | 2009-08-19 | 贾会平 | Fusion ironmaking apparatus |
-
2010
- 2010-01-12 CN CN2010100333567A patent/CN101775455B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6379422B1 (en) * | 1999-08-05 | 2002-04-30 | Technological Resources Pty. Ltd. | Direct smelting process |
| CN1504582A (en) * | 2002-12-03 | 2004-06-16 | 中国科学院过程工程研究所 | Gas base reduction iron-smelting method and apparatus |
| CN1789870A (en) * | 2005-12-23 | 2006-06-21 | 济南济钢设计院 | Pelletizing shaft furnace with smooth descent and diversion functions |
| CN201292373Y (en) * | 2008-10-29 | 2009-08-19 | 贾会平 | Fusion ironmaking apparatus |
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| CN101775455A (en) | 2010-07-14 |
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Owner name: SHIJIAZHUANG XINHUA ENERGY ENVIRONMENTAL TECHNOLOG Free format text: FORMER OWNER: JIA HUIPING Effective date: 20130114 |
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Effective date of registration: 20130114 Address after: 051431 Hebei city of Shijiazhuang province Luancheng douyu town equipment manufacturing base of Xinhua Road No. 6 (douyu West Middle School) Patentee after: Shijiazhuang Xinhua Energy and Environmental Protection Technology Co., Ltd. Address before: 050091 Hebei city of Shijiazhuang Province in the South Street Palace Road No. 88 Patentee before: Jia Huiping |