CN201104092Y - Built-in coal based sponge iron shaft furnace - Google Patents
Built-in coal based sponge iron shaft furnace Download PDFInfo
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- CN201104092Y CN201104092Y CNU2007200326035U CN200720032603U CN201104092Y CN 201104092 Y CN201104092 Y CN 201104092Y CN U2007200326035 U CNU2007200326035 U CN U2007200326035U CN 200720032603 U CN200720032603 U CN 200720032603U CN 201104092 Y CN201104092 Y CN 201104092Y
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Abstract
The utility model relates to a built-in coal matrix sponge iron shaft furnace, which is a smelting furnace for using coal to directly reduce sponge iron. The utility model mainly comprises a reduction furnace and a gasification furnace which are connected up and down, wherein, the top of the reduction furnace is provided with sealing bunkers; feed openings of the sealing bunkers are connected with a material climbing device; the sealing bunkers comprise a coal sealing bunker and a mine sealing bunker which are respectively connected with the reduction furnace through self feed pipes; a discharge hole of the reduction furnace is connected with a cooling tower; a built-in furnace liner is arranged inside the reduction furnace; an air circulation hole is arranged on the furnace liner; a tempering room is formed by the lower part of the furnace liner and the upper end of the gasification furnace; two to ten helical feeding conduits are arranged around the outer circumference of the furnace liner from the top down. The shaft furnace can control the temperature of various parts in the reduction furnace and simultaneously makes mines and coal in the furnace enclose the built-in furnace liner to move simultaneously and slowly from the top down and conversely fully contact the rising temperature and reducing gas CO in a furnace body; moreover, the shaft furnace solves the problems of preheating of the mines and prevention of low-temperature crack of the mines, greatly improving the reduction rate.
Description
Technical field
Utility model relates to the smelting furnace technology, exactly is a kind of built-in coal-based sponge iron shaft furnace with the direct reducing sponge iron of coal or other metal oxide.
Background technology
Present international, domestic all the have many sponge iron production technologies and the various type of furnace, the sponge iron of being produced (DRI) are supplied with steel mill as quality raw materials production steel or as flux, and cooling agent uses.It plays certain positive role for improving steel product quality and increase rolling shapes etc. really, but far can not satisfy the demand of iron and steel production now as its output of a kind of raw material.Trace it to its cause, how many international at present and domestic sponge iron furnaces exists some drawbacks: with gas base reducing process is example, under the energy-intensive situation, with the natural gas reduction is that many strong points are arranged, but its price is more expensive, strengthened product cost undoubtedly, and where natural gas neither have, so its development has been subjected to certain restriction; Produce sponge iron with coal as thermal source and reducing agent, from cost, can reduce really, and generality is arranged, but all there is different shortcomings in reduction furnace both at home and abroad at present, has also limited the production of sponge iron, with the now domestic kiln process that generally uses, it relatively maximizes really, output is also high, but because the type of furnace is bigger, the inside and outside facility of stove is more, therefore one-time investment is bigger, and coal consumption is also big, often occurs the ring formation phenomenon aborning, needs blowing out to handle; Also need iron, cinder being separated of while output through magnetic separation through cooled sponge iron, and tiny sponge iron also needs could use after cuber becomes piece, has strengthened workload like this, has also strengthened cost undoubtedly.All exist coal consumption bigger as for tunnel furnace method, multitube oven process and pot type oven process etc., disadvantage such as percent reduction is lower.Therefore these type of furnaces are less is used; The above type of furnace and the shaft furnace that does not relate to, what mostly use is acid pellet, seldom directly use high grade ore to reduce, under cryogenic conditions (below 600 ℃) produce explosion because these type of furnaces can't solve iron ore, directly influence the up and reduction problem of air-flow,, strengthened undoubtedly and built the stove cost though increase the combustion chamber to solve ore preheating and anti-ore low temperature explosion problem some national design on shaft furnace top, still be in experimental period up till now, stove do not finalized the design as yet.Have only the U.S. to be warmed to more than 800 ℃ to meet and to reduce by the furnace charge on stove top, the electric elements energising back heat that has a resistance with rising coal gas-CO with " electric reduction process ".This type of furnace formally put into production as far back as the eighties, but it to be power consumption consume coal again, so its cost is also higher, the sponge iron that comes out also need through Magnetic Isolation go out sponge iron, eliminate cinder and lime mud, powder, so later process also can strengthen workload and cost.
Summary of the invention
The purpose of this utility model is in order to solve existing problem in the above-mentioned production sponge iron technology, and a kind of simple in structure, production cost is low, reduction efficiency is high built-in coal-based sponge iron shaft furnace is provided.
This purpose realizes with following technical proposal: described built-in coal-based sponge iron shaft furnace is is mainly connected and composed up and down by reduction furnace, gasification furnace, wherein the top arrangement of reduction furnace has seal silo, the feeding mouth of seal silo connects climbs materials device, particularly the reduction furnace discharging opening connects cooling tower, be provided with built-in flue in the inside of reduction furnace, furnace wall is provided with the gas communication hole, flue bottom and gasification furnace upper end form tempering room, be provided with 2-10 bar charging conduit from top to bottom around the flue periphery, this charging conduit spirality.Described seal silo comprises two in coal and ore deposit, they respectively the tremie pipe by separately be connected with reduction furnace.The number of tremie pipe and charging conduit is corresponding and join respectively.
The utility model compared with prior art has the following advantages: because this body of heater is provided with built-in flue and spiral channel, can be controlled the temperature of each several part in the reduction furnace, also make simultaneously ore in the stove gently center on built-in flue simultaneously from top to bottom and move with coal, and with body of heater in ascending temperature and reducing gas-CO is reverse fully contacts; Solve ore preheating and anti-ore low temperature explosion problem, improved percent reduction greatly, finally improved metal recovery rate.Because helical duct is constantly shifted one's position ore and coal when descending, therefore can not form sticking connection or conglomeration, can not hang stove yet, reduce blowing out and handle.It not only is used for iron ore, also can be used for other metal oxide is reduced or fusion, and for example: silicon, magnesium, copper, aluminium, lead and titanium etc. reduce or fusion.
Description of drawings
Fig. 1 is the whole external and internal compositions schematic diagram of the utility model.
Fig. 2 is the connection diagram between built-in flue, spiral channel and the tremie pipe.
Fig. 3 is that the A-A of Fig. 2 is to view.
The specific embodiment
In conjunction with the accompanying drawings overall structure of the present utility model and operation principle thereof are specified:
As shown in Figure 1, 2, this built-in coal-based sponge iron shaft furnace is to be connected and composed up and down by reduction furnace 1, gasification furnace 2.Wherein the top arrangement of reduction furnace 1 has seal silo 4, and seal silo has two, and one is coal store, and one is ore pocket, and the tremie pipe 5 that they pass through separately respectively is connected with reduction furnace, and the feeding mouth of two seal silos connects auxiliary equipment and climbs materials device 7.The reduction furnace discharging opening connects auxiliary equipment cooling tower 3.Wherein the inside of reduction furnace 1 is provided with built-in flue 6, and furnace wall is provided with gas communication hole 10, and flue bottom and gasification furnace 2 upper ends form tempering room 8, and upward downstream communicates.Be provided with 2,6 or more spirality charging conduits 9 from top to bottom around flue 6 peripheries, what of spirality charging conduit be set according to the size of reduction furnace output.The number of spiral charging number of channels and tremie pipe 5 is corresponding and join respectively.The last end device of gasification furnace 2 has annular steam delivery pipe 19, and following end device has auxiliary equipment slag extractor 12 and connects scum pipe 11, and the side below the gasification furnace connects blast pipe and air blast 13.Side device below the cooling tower 3 has into cold water pipe 16, and end device has heat extraction water pipe 17 on it, and discharging machine 14 and material conveyer belt 15 are equipped with in the lower end.Device has workbench 20,21 respectively in the upper end of reduction furnace 1, gasification furnace 2.The body of heater of whole built-in coal-based sponge iron shaft furnace is supported by grate 18.Referring to Fig. 2,3, described spiral charging conduit has 2, and they rotate in the same way around flue 6 peripheries from top to bottom, and its upper end tremie pipe by separately 5 respectively seals respectively with coal charge storehouse and ore bunker 4 and joins.The body of heater profile is formed by metal material processing; Flue, spiral charging conduit are the refractory material manufacturing.
The operation principle of this built-in coal-based sponge iron shaft furnace: by climbing materials device 7 separately seal silo is delivered to by hopper 22 separately respectively in coal and ore deposit, enter in the body of heater separately spirality charging conduit by tremie pipe 5 again.Ore deposit and the coal spirality charging conduit by separately is advanced into reduction furnace 16 times around flue from top to bottom by deadweight afterwards.Coal carries out burn incompletely earlier to the bottom of gasification furnace and emits a large amount of CO, is advanced into combustion zone down and fully burns and guarantee that enough reduction temperatures are arranged, and blast pipe and air blast 13 are constantly carried air to gasification furnace simultaneously.And ore fully contacts with 850 ℃ of-1000 ℃ of high temperature reduction gases when descending by deadweight at oneself conduit and is reduced gradually, enter cooling tower 3 by the reduction furnace lower part outlet then, when temperature is reduced to below 60 ℃, material is sent by sealed discharging machine 14 and material conveyer belt 15; Hot water is by hot-water line 17 dischargings.Slag is discharged by scum pipe 11 by slag extractor 12.Steam in the gasification furnace is gathered by annular steam delivery pipe 19 is again discharged by house steward 23.
Claims (3)
1, a kind of built-in coal-based sponge iron shaft furnace, it is is mainly connected and composed up and down by reduction furnace (1), gasification furnace (2), wherein the top arrangement of reduction furnace (1) has seal silo (4), the feeding mouth of seal silo connects climbs materials device (7), it is characterized in that the reduction furnace discharging opening connects cooling tower (3), be provided with built-in flue (6) in the inside of reduction furnace, furnace wall is provided with gas communication hole (10), flue bottom and gasification furnace upper end form tempering room (8), be provided with 2-10 bar charging conduit (9) from top to bottom around the flue periphery, this charging conduit spirality.
2, built-in coal-based sponge iron shaft furnace according to claim 1 is characterized in that described seal silo (4) comprises two in coal and ore deposit, they respectively the tremie pipe (5) by separately be connected with reduction furnace (1).
3, built-in coal-based sponge iron shaft furnace according to claim 2 is characterized in that the number of tremie pipe (5) and charging conduit (9) is corresponding and joins respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200326035U CN201104092Y (en) | 2007-08-28 | 2007-08-28 | Built-in coal based sponge iron shaft furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200326035U CN201104092Y (en) | 2007-08-28 | 2007-08-28 | Built-in coal based sponge iron shaft furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201104092Y true CN201104092Y (en) | 2008-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200326035U Expired - Fee Related CN201104092Y (en) | 2007-08-28 | 2007-08-28 | Built-in coal based sponge iron shaft furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN201104092Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792841B (en) * | 2009-02-02 | 2011-11-09 | 中冶赛迪工程技术股份有限公司 | CO2 recycle method for sponge iron gasification production |
| CN102409128A (en) * | 2011-12-06 | 2012-04-11 | 刘元生 | Device and process for making gas and reducing iron through coal derived fusion melting bed |
| TWI496893B (en) * | 2010-07-13 | 2015-08-21 | Siemens Vai Metals Tech Gmbh | Cooling apparatus for hot bulk goods |
| CN106755688A (en) * | 2016-12-15 | 2017-05-31 | 江苏省冶金设计院有限公司 | A kind of cold bound pellet prepares the gas-based shaft kiln and its method of sponge iron |
| CN113249537A (en) * | 2021-06-17 | 2021-08-13 | 北京金博威科技有限公司 | Flood dragon reactor and reaction method thereof |
-
2007
- 2007-08-28 CN CNU2007200326035U patent/CN201104092Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792841B (en) * | 2009-02-02 | 2011-11-09 | 中冶赛迪工程技术股份有限公司 | CO2 recycle method for sponge iron gasification production |
| TWI496893B (en) * | 2010-07-13 | 2015-08-21 | Siemens Vai Metals Tech Gmbh | Cooling apparatus for hot bulk goods |
| CN102409128A (en) * | 2011-12-06 | 2012-04-11 | 刘元生 | Device and process for making gas and reducing iron through coal derived fusion melting bed |
| CN102409128B (en) * | 2011-12-06 | 2013-03-27 | 刘元生 | Device and process for making gas and reducing iron through coal derived fusion melting bed |
| CN106755688A (en) * | 2016-12-15 | 2017-05-31 | 江苏省冶金设计院有限公司 | A kind of cold bound pellet prepares the gas-based shaft kiln and its method of sponge iron |
| CN113249537A (en) * | 2021-06-17 | 2021-08-13 | 北京金博威科技有限公司 | Flood dragon reactor and reaction method thereof |
| CN113249537B (en) * | 2021-06-17 | 2024-01-30 | 北京金博威科技有限公司 | Dragon reactor and reaction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080820 Termination date: 20130828 |