CN102409128A - Device and process for making gas and reducing iron through coal derived fusion melting bed - Google Patents
Device and process for making gas and reducing iron through coal derived fusion melting bed Download PDFInfo
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- CN102409128A CN102409128A CN2011104006234A CN201110400623A CN102409128A CN 102409128 A CN102409128 A CN 102409128A CN 2011104006234 A CN2011104006234 A CN 2011104006234A CN 201110400623 A CN201110400623 A CN 201110400623A CN 102409128 A CN102409128 A CN 102409128A
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Abstract
The invention relates to a device for making gas and reducing iron through a derived fusion melting bed. The device is characterized by comprising a reduction furnace and a gasification furnace which are fixedly connected, wherein the reduction furnace is internally provided with a reduction chamber; the upper and lower parts of the reduction furnace are respectively provided with a feed inlet, a feed outlet and an air outlet; the gasification furnace is a fusion bed gasification furnace which is internally provided with a gasification chamber; the gasification furnace is provided with a coal nozzle, an air nozzle and a deslagging port; and the joint of the reduction furnace and the gasification furnace is provided with a grate plate which is provided with an air vent communicating the reduction chamber with the gasification chamber. The invention also relates to a process for making gas and reducing by using the device. The device is reasonable in design and high in coal gasification rate and can be used for saving energy sources effectively.
Description
Technical field
The present invention relates to a kind of non-blast furnace ironmaking device, particularly a kind of device of coal-base melting bed system gas reduced iron; The invention still further relates to the device system gas reductive technology of utilizing aforementioned coal-base melting bed system gas reduced iron.
Background technology
MOX is reduced into metal and the method that is used is that technology obtains metal effective means the most with reductive agent.Modern method with this acquisition iron is broadly divided into two big types: one type is with the heating of putting together of solid reductant and ferriferous oxide, behind the solid reductant combustion gasification with ferriferous oxide reductive method; It the most successful story be blast furnace.Another kind of is with gasification reductive agent or solid reductant is transformed into the gasification reductive agent, the method for the reducing iron oxides that goes to heat; Its successful story is the MIDREX shaft furnace.These two class methods are all because under hot environment, and reductive agent uses inadequately fully (because Boudouard reaction), cause the reduction energy consumption higher, uneconomical.
China's publication 201110115332.0 " two step method is produced the technology of reduced iron powder " proposes to add gentle reduction operation separately carries out, and promptly " the anti-burning technology of duplex skill container residue reductive agent " makes the energy expenditure that obtains metallic iron can reduce to minimum.The problem that reduction exists in the operation has: 1, solid reductant and the oxide compound reduction technique of heating of putting together; Reductive agent not only can pollute the metal that obtains, and the transformation efficiency of carbon also is not easy to improve.2, gas reduction technology: owing to use natural gasification reductive agent generally not obtain, so the MIDREX shaft furnace can not generally be promoted.3, independently solid reductant is converted into the Coal Chemical Industry reduction technique of gasification reductive agent: because huge, the complex technical process of one-time investment also is difficult to obtain application in commercial run.
Summary of the invention
Technical problem to be solved by this invention is the deficiency to prior art, provides that a kind of structure design is more reasonable, gasification rate height, the effectively device of the coal-base melting bed system gas reduced iron of save energy.
Another technical problem to be solved by this invention provides the device system gas reductive technology of coal-base melting bed system gas reduced iron more than a kind of the utilization.
Technical problem to be solved by this invention is to realize through following technical scheme.The present invention is a kind of device of coal-base melting bed system gas reduced iron, is characterized in: it comprises the reduction furnace and the vapourizing furnace of fixed connection, is provided with the reduction chamber in the reduction furnace, and the reduction furnace upper and lower is respectively equipped with opening for feed, discharge port and air outlet; Described vapourizing furnace is the molten bath gasification stove, is provided with vaporizer in the vapourizing furnace, and vapourizing furnace is provided with coal powder injection mouth, air nozzle and slag-drip opening, and the junction of reduction furnace and vapourizing furnace is provided with the comb plate, and the comb plate is provided with the ventilating pit that is communicated with reduction chamber and vaporizer.
In the device of above-described coal-base melting bed system gas reduced iron: described reduction furnace can be shaft furnace, open hearth or slope stove.When reduction furnace was shaft furnace, described vapourizing furnace preferably was fixed on the bottom of shaft furnace.When described reduction furnace was the slope stove, described vapourizing furnace preferably was fixed on the top of slope stove.
In the device of above-described coal-base melting bed system gas reduced iron: described coal powder injection mouth is a following spray coal powder injection mouth, and described air nozzle is oblique following formula air nozzle.
Technical problem to be solved by this invention can also further realize through following technical scheme.Also a kind of system gas reducing process that utilizes above-described coal-base melting bed system gas iron reducing device by utilizing to carry out of the present invention is characterized in that its step is following:
(1) with leading portion furnace charge heating installation with behind charge preheating to 1200～1350 ℃, furnace charge is indoor to reducing from the opening for feed hot charging, and the charge-temperature after charging is accomplished is not less than 1000 ℃; Furnace charge is pelletizing, natural lump ore or sintering lump ore shape; When filling with substance pack on demand partial reduction agent, limestone powder or ground dolomite;
(2) the comb plate is passed to heat in the vaporizer, and the coal powder injection mouth tiltedly is sprayed onto fine coal on the comb plate, springs into the air mixed burning that vaporizer and air nozzle spray into, and generates reducing gas; The remaining slag of coal combustion falls under gravity into slag-drip opening, discharges out of the furnace; The reducing gas that generates gets into the reduction chamber through the comb plate and does in furnace charge, and furnace charge is heated to 1400-1500 ℃ and it is reduced into metal granulated iron;
(3) furnace charge discharges out of the furnace through discharge port and send cooling apparatus to reduce to room temperature or remove electrosmelting in the reduction furnace; Reducing gas passes furnace charge outside the air outlet is discharged to stove, send leading portion furnace charge heating installation preheating furnace charge through supporting waste heat recovery apparatus, dust-removal and desulfurizing equipment, induced draft fan.
Coal-base melting bed system gas iron reducing device by utilizing of the present invention is a kind of gas and iron reducing device by utilizing that is reduced to one made.Matching used waste heat recovery apparatus, dust-removal and desulfurizing equipment, induced draft fan, front end furnace charge heating installation and cooling apparatus are conventional equipment.
Reduction shaft furnace of the present invention can be built by laying bricks or stones by refractory materials, and WP generally is no more than 0.5MPa in the stove.Leading portion furnace charge heating installation can be shaft furnace, rotary kiln, belt type roasting machine or sinter machine, and the external feed pipe of reduction furnace opening for feed can be provided with bell in the feed pipe, furnace charge add adorned the back bell can pipeline is airtight.
The charging part hard coal of can packing into simultaneously, the ratio of installing additional is 1:0.3～0.6 of iron ore oxygen level, its effect is that the oxygen in the iron ore is taken out of more easily.Simultaneously can also add limestone powder or ground dolomite, effect is to prevent furnace charge adhesion and absorption harmful element.
The length of reduction shaft furnace chamber is because output is different, and its design length can be 3～15m, and the length of vaporizer is about 2～4m; The vaporizer of shaft furnace generally is placed in the bottom of shaft furnace, and the air outlet is arranged on the top of shaft furnace; Reducing gas gets into the reduction chamber from comb plate between two Room, bottom, passes whole furnace charge and discharges out of the furnace from the air outlet, top.
Shaft furnace bottom discharge mouth can be provided with sluice gate, when furnace charge reduction finishes, decontrols sluice gate the furnace charge cooling apparatus that discharges out of the furnace is cooled to normal temperature or send electrosmelting; Cooling apparatus can be cooling tank or dry coke quenching formula cooling system.
The following spray coal powder injection mouth of vaporizer is sprayed onto comb plate top between two Room with coal dust, and bounce-back returns just in time to burn with the air mixed of 2～3 air nozzle ejections obliquely.
Because furnace charge gravity is different in the stove of slope, vaporizer can be arranged on the front portion of reduction slope stove, and the air outlet is arranged on the bottom of reduction slope stove.
Compared with prior art, apparatus of the present invention and technology have the following advantages: apparatus of the present invention are fixed as one reduction furnace and vapourizing furnace, and adopt the molten bath gasification stove; It utilizes high-temperature material to carry out gas maked coal; It is rational in infrastructure, and efficiency of carbon conversion is higher relatively, and the coal scope of application is wider.Apparatus of the present invention are to utilize the high temperature furnace charge of packing into that coal is converted into reducing gas, and it is more reasonable to design.Put together the reduction technique of heating of the present invention and solid reductant and oxide compound is compared, and the recrement of reductive agent can not pollute furnace charge.The present invention and independent coal are converted into the iron reduction technique of gasification reductive agent and compare, and the present invention need be with coal gas cooling, dedusting, remove complicated technology such as reduced iron after reforming and heating again; In fact the coal reduced iron also is a producer gas process, and will making gas and reduction, to be designed to its technology of one the most effective.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention of employing shaft furnace;
Fig. 2 is for adopting the apparatus structure synoptic diagram of the present invention of slope stove.
Embodiment
Following with reference to accompanying drawing, further describe concrete technical scheme of the present invention, so that those skilled in the art understands the present invention further, and do not constitute restriction to its right.
(1) with leading portion furnace charge heating installation with behind the charge preheating to 1200 ℃, furnace charge is indoor to reducing from opening for feed 9 hot chargings, and the charge-temperature after charging is accomplished is not less than 1000 ℃; Furnace charge is pelletizing, natural lump ore or sintering lump ore shape; When filling with substance pack on demand partial reduction agent, limestone powder or ground dolomite;
(2) comb plate 2 is passed to heat in the vaporizer, and coal powder injection mouth 3 tiltedly is sprayed onto fine coal on the comb plate 2, springs into the air mixed burning that vaporizer and air nozzle 6 spray into, and generates reducing gas; The remaining slag of coal combustion falls under gravity into slag-drip opening 5, discharges out of the furnace; The reducing gas that generates gets into the reduction chambers through comb plate 2 and does in furnace charge, and furnace charge is heated to 1400 ℃ and it is reduced into metal granulated iron;
(3) furnace charge discharges out of the furnace through discharge port 7 and send cooling apparatus to reduce to room temperature or remove electrosmelting in the reduction furnace 1; Reducing gas passes furnace charge and 8 is discharged to outside the stove from the air outlet, send leading portion furnace charge heating installation preheating furnace charge through supporting waste heat recovery apparatus, dust-removal and desulfurizing equipment, induced draft fan.
(1) with leading portion furnace charge heating installation with behind the charge preheating to 1300 ℃, furnace charge is indoor to reducing from opening for feed 9 hot chargings, and the charge-temperature after charging is accomplished is not less than 1000 ℃; Furnace charge is pelletizing, natural lump ore or sintering lump ore shape; When filling with substance pack on demand partial reduction agent, limestone powder or ground dolomite;
(2) comb plate 2 is passed to heat in the vaporizer, and coal powder injection mouth 3 tiltedly is sprayed onto fine coal on the comb plate 2, springs into the air mixed burning that vaporizer and air nozzle 6 spray into, and generates reducing gas; The remaining slag of coal combustion falls under gravity into slag-drip opening 5, discharges out of the furnace; The reducing gas that generates gets into the reduction chambers through comb plate 2 and does in furnace charge, and furnace charge is heated to 1500 ℃ and it is reduced into metal granulated iron;
(3) furnace charge discharges out of the furnace through discharge port 7 and send cooling apparatus to reduce to room temperature or remove electrosmelting in the reduction furnace 1; Reducing gas passes furnace charge and 8 is discharged to outside the stove from the air outlet, send leading portion furnace charge heating installation preheating furnace charge through supporting waste heat recovery apparatus, dust-removal and desulfurizing equipment, induced draft fan.
Claims (6)
1. the device of a coal-base melting bed system gas reduced iron, it is characterized in that: it comprises the reduction furnace and the vapourizing furnace of fixed connection, is provided with the reduction chamber in the reduction furnace, the reduction furnace upper and lower is respectively equipped with opening for feed, discharge port and air outlet; Described vapourizing furnace is the molten bath gasification stove, is provided with vaporizer in the vapourizing furnace, and vapourizing furnace is provided with coal powder injection mouth, air nozzle and slag-drip opening, and the junction of reduction furnace and vapourizing furnace is provided with the comb plate, and the comb plate is provided with the ventilating pit that is communicated with reduction chamber and vaporizer.
2. the device of coal-base melting bed system gas reduced iron according to claim 1, its spy is: described reduction furnace is shaft furnace, open hearth or slope stove.
3. the device of coal-base melting bed system gas reduced iron according to claim 1 is characterized in that: described reduction furnace is a shaft furnace, and described vapourizing furnace is fixed on the bottom of shaft furnace.
4. the device of coal-base melting bed system gas reduced iron according to claim 1 is characterized in that: described reduction furnace is the slope stove, and described vapourizing furnace is fixed on the top of slope stove.
5. the device of coal-base melting bed system gas reduced iron according to claim 1 is characterized in that: described coal powder injection mouth is a following spray coal powder injection mouth, and described air nozzle is oblique following formula air nozzle.
6. the system gas reducing process that any one described coal-base melting bed system gas iron reducing device by utilizing carries out among utilization such as the claim 1-5 is characterized in that its step is following:
(1) with leading portion furnace charge heating installation with behind charge preheating to 1200～1350 ℃, furnace charge is indoor to reducing from the opening for feed hot charging, and the charge-temperature after charging is accomplished is not less than 1000 ℃; Furnace charge is pelletizing, natural lump ore or sintering lump ore shape; When filling with substance pack on demand partial reduction agent, limestone powder or ground dolomite;
(2) the comb plate is passed to heat in the vaporizer, and the coal powder injection mouth tiltedly is sprayed onto fine coal on the comb plate, springs into the air mixed burning that vaporizer and air nozzle spray into, and generates reducing gas; The remaining slag of coal combustion falls under gravity into slag-drip opening, discharges out of the furnace; The reducing gas that generates gets into the reduction chamber through the comb plate and does in furnace charge, and furnace charge is heated to 1400-1500 ℃ and it is reduced into metal granulated iron;
(3) furnace charge discharges out of the furnace through discharge port and send cooling apparatus to reduce to room temperature or remove electrosmelting in the reduction furnace; Reducing gas passes furnace charge outside the air outlet is discharged to stove, send leading portion furnace charge heating installation preheating furnace charge through supporting waste heat recovery apparatus, dust-removal and desulfurizing equipment, induced draft fan.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104006234A CN102409128B (en) | 2011-12-06 | 2011-12-06 | Device and process for making gas and reducing iron through coal derived fusion melting bed |
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| CN2011104006234A CN102409128B (en) | 2011-12-06 | 2011-12-06 | Device and process for making gas and reducing iron through coal derived fusion melting bed |
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| CN102409128B CN102409128B (en) | 2013-03-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618684A (en) * | 2012-04-18 | 2012-08-01 | 石家庄市新华工业炉有限公司 | Continuous melting reduction iron-making device |
| CN103667564A (en) * | 2013-05-20 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Method for preparing metal elementary substance |
| WO2017020793A1 (en) * | 2015-08-01 | 2017-02-09 | 江学艺 | Cobalt or nickel enrichment method |
| CN112940786A (en) * | 2021-02-07 | 2021-06-11 | 刘元生 | Garbage and biomass gasification furnace and device |
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| CN201104092Y (en) * | 2007-08-28 | 2008-08-20 | 高家忠 | Built-in coal based sponge iron shaft furnace |
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2011
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Patent Citations (6)
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| CN85104511A (en) * | 1984-06-12 | 1987-07-08 | 科夫工程有限公司 | Gasifier and direct assembly of reduction furnace |
| US4908059A (en) * | 1988-01-29 | 1990-03-13 | Kabushiki Kaisha Kobe Seiko Sho | Process for melting cold iron material |
| CN1118009A (en) * | 1995-06-23 | 1996-03-06 | 宝山钢铁(集团)公司 | Method for production of sponge iron by using gas-making shaft furnace method of coal-base melting bed |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618684A (en) * | 2012-04-18 | 2012-08-01 | 石家庄市新华工业炉有限公司 | Continuous melting reduction iron-making device |
| CN102618684B (en) * | 2012-04-18 | 2013-05-15 | 石家庄新华能源环保科技股份有限公司 | Continuous melting reduction iron-making device |
| CN103667564A (en) * | 2013-05-20 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Method for preparing metal elementary substance |
| CN103667564B (en) * | 2013-05-20 | 2016-06-01 | 江苏省冶金设计院有限公司 | Prepare the method for metal simple-substance |
| WO2017020793A1 (en) * | 2015-08-01 | 2017-02-09 | 江学艺 | Cobalt or nickel enrichment method |
| CN112940786A (en) * | 2021-02-07 | 2021-06-11 | 刘元生 | Garbage and biomass gasification furnace and device |
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| CN102409128B (en) | 2013-03-27 |
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Application publication date: 20120411 Assignee: Jiang Hua Kun Hao Industrial Co., Ltd. Assignor: Liu Yuansheng Contract record no.: 2015320000160 Denomination of invention: Device and process for making gas and reducing iron through coal derived fusion melting bed Granted publication date: 20130327 License type: Exclusive License Record date: 20150413 |
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