CN201653126U - Energy-saving tunnel reducing furnace - Google Patents
Energy-saving tunnel reducing furnace Download PDFInfo
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- CN201653126U CN201653126U CN2010201390223U CN201020139022U CN201653126U CN 201653126 U CN201653126 U CN 201653126U CN 2010201390223 U CN2010201390223 U CN 2010201390223U CN 201020139022 U CN201020139022 U CN 201020139022U CN 201653126 U CN201653126 U CN 201653126U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model belongs to high-temperature reactor equipment for coal and gas-based direct reduction iron smelting or coke smelting, in particular to an energy-saving tunnel reducing furnace, aiming to solve the problem of the traditional tunnel type coal-based direct reduction iron smelting equipment. The reducing furnace comprises a furnace passage. Two doors are respectively arranged at the entrance and exit. Two furnace walls near the inner door of the entrance are respectively provided with gas pumping holes, and the furnace top near the inner door of the exit is provided with a reducing gas pipe which is led into the furnace passage. The outsides of the middle two furnace walls near the furnace passage are respectively provided with a gas combusting chamber. A large-hole pattern heat storing wall is arranged in each gas combusting chamber. Both ends of each gas combusting chamber are respectively provided with a plurality of small-hole heat storing bodies. The center of a conical cover for covering the small-hole heat storing body group is connected with a wing/fume pipe. Both sides of each small-hole heat storing body group are provided with a gas combusting pipe. The utility model completely recycles the gas of reduction byproducts and coal volatile ingredients, and solves the serious problem of high energy consumption of other coal-based direct reduction iron smelting equipment.
Description
Technical field
The utility model belongs to coal, gas base directly reducing ironmaking, or the high-temperature reactor apparatus technology of refining formed coke, is specifically related to a kind of energy-conservation tunnel reduction furnace.
Background technology
Tunnel reduction furnace, kiln both at home and abroad mainly contains following two big classes at present:
More common is canned method tunnel reduction furnace, and its kiln type is a straight culvert, and culvert has and long weak point arranged, and having widely has narrowly, and there have height to have to be low, has track to advance for kiln car in the hole.On near kiln top, position that enters the mouth or both sides kiln wall, leave several smoke evacuation pores, flue gas is extracted out in kiln by the suction of air-introduced machine or chimney stack; On the kiln top of the middle part of kiln, leave greatly and throw coal or flame-observing hole, or several coal gas nozzles are arranged on the both walls of kiln.Usually kiln hood (inlet) is provided with wicket, opens during the car of top, closes during operation, and kiln tail (outlet) opens wide.During direct reduction iron making, Iron Ore Powder and coal dust and desulfurizing agent blending or layering are packed in the special fire-resistant can, canned to kiln car, the kiln car that carries jar is pushed up to the kiln tail from kiln hood one by one, throw coal or kiln side coal powder injection gas in the kiln internal combustion at the middle part of kiln by the kiln top, combustion-supporting air is the air-introduced machine or the chimney stack of being smoked by kiln hood, sucking from the kiln tail that opens wide (also has indivedual kiln tails that door is arranged in the kiln, but on the door air blast in kiln of several air blasts is arranged), flame at first heats tank body, and tank body conducts heat to the Iron Ore Powder in the jar again, material such as coal dust, be warmed up to uniform temperature after, coal in jar is captured the oxygen of breeze, and iron is reduced.When kiln car is advanced to the combustion zone back segment, jar on the kiln car and jar in a thing be inhaled into the chilled air cools of driving in the wrong direction with car in the kiln, until being cooled to below 50 ℃ behind the kiln discharge, reduced iron in drawing off jar and coal ash etc., again with in the tank fillings such as Iron Ore Powder, coal dust, come again from the beginning to the end again.The process characteristic of this method is that the coal of burning input or the coal gas that sprays into are in the kiln internal combustion, and flame directly burns jar, and by a jar heat transfer jar interior material, large space is an oxidizing atmosphere in the whole kiln, is reducing atmosphere in the jar.When jar is in flame zone, coal reduced iron in jar, the fugitive constituent (H of coal gas of by-product (CO) and coal
2, CO, CnHm) overflow jar after with oxidized burning.And be in the flame zone leading portion jar the particularly fugitive constituent of coal (fugitive constituent of coal in this district a large amount of even all overflow) of the reduction by-product gas of overflowing, since anaerobic or anoxic (airborne oxygen consumes at flame zone) in the kiln herein, these reducibility gas (CO, H
2) maybe can be transformed into the imflammable gas (CnHm) of reducibility gas, just be blended in the flue gas (N that the combustion zone produces
2, CO
2, H
2O etc.) in, extracted out the outer emptying of kiln, caused the waste of air pollution and valuable gases, caused this method energy consumption higher by air-introduced machine or chimney stack.Its advantage is that mechanization even automaticity can improve, continuity production, efficient height, constant product quality, kiln body investment itself is moderate, but corollary equipment (gas generator of external heat source) investment is big, reduction jar not only investment is big, and the rapid wear that colds and heat succeed each other.The loading and unloading material easily produces dust.
Reduction furnace at the bottom of the chauffeur of another kind method, its structure and operation principle and aforesaid tunnel cave substantially roughly the same, the main difference point has four: one, this law kiln space is less, the distance between kiln pushes up at the bottom of the car is less; Its two, this law does not need jar, being will Iron Ore Powder, coal dust, desulfurizing agent are made ball earlier after mixing, then ball is tiled at the bottom of the car on (thinner); Its three, the coal gas of burning and combustion air all are that the some nozzles that distribute from kiln body middle part blast, air is not to suck from kiln tail mouth, just its cooling agent is not an air; Its four, blast indifferent gas (N at kiln tail mouth
2), stop air to enter, the bead that reduction is good is cooled off by inert gas.The advantage of this method is no longer to need jar and tinning, has reduced the investment and the daily additional spending of jar; Dust is less, and the automatic and mechanical degree can improve, and reduction rate is fast, but the fast operation intensity of equipment turnover operation is big.Its process characteristic is, flame is in the burning of the top of kiln, and upper space is an oxidizing atmosphere, and at the bottom of the car around the little space of bead, because the continuous effusion of reduction by-product gas forms local reduction atmosphere.When vehicle-mounted bead does not reach flame zone, the fugitive constituent gas (H that has overflowed
2, CO, CnHm) and reduce by-product gas (CO) on a small quantity and also all can not effectively utilize.This method needs special preparation inert gas, has not only increased investment but also strengthened cost.
Summary of the invention
The utility model adopts the principle of similar coking by coke oven in order to solve the problem that existing tunnel formula coal-based (coal is a reducing agent) direct reduction iron making equipment exists, and a kind of energy-conservation tunnel reduction furnace is provided.
The utility model adopts following technical scheme to realize: energy-conservation tunnel reduction furnace, comprise combustion flue, it is characterized in that combustion flue is the straight tube tunnel of building by laying bricks or stones, its entrance and exit place is liftable respectively with the inlet inside door, inlet external door and outlet inside door, the sealing of outlet external door, the combustion flue bottom is provided with the track that supplies tunnel garage to advance, what each useful refractory brick was built by laying bricks or stones near the both sides furnace wall of inlet inside door takes out gas vent, the reducing gas pipe that feeds in the combustion flue is arranged on the furnace roof near the outlet inside door, near outside both sides, the middle part furnace wall of combustion flue a gas burner is being arranged respectively, in the indoor macropore lattice Heat Storing Wall that has several to build by laying bricks or stones of each gas-fired with refractory brick, at the two ends of each gas burner some aperture heat storages are housed all, outside, two ends in each gas burner, all each aperture heat storage group is being covered with cone-shaped hood, cone-shaped hood central authorities are connected with wind/fume pipe, and the coal combustion tracheae that feeds the gas burner is arranged in each aperture heat storage group both sides.
Energy-conservation tunnel reduction furnace, a kind of narrow and high continuous tunnel furnace, at two of stove and near the appropriate location, two ends a liftable door (amounting to 4 doors) is installed respectively, wherein the Men Douke at two is totally-enclosed with stove, and two inside doors are that the upper space to furnace roof at the bottom of the car in the stove is cut off sealing.Leave some holes in the furnace wall both sides near entrance inside door place, be communicated with cooler, dehydrator, air-introduced machine, gas holder by pipeline valve, the coal gas and the coal fugitive constituent combustible gas of reduction by-product in the kiln are together concentrated through the duct to pump to gas holder.
Outside the furnace wall of the both sides, middle part of stove two gas burners are arranged, the furnace wall of this part adopts the good refractory material (as SiC) of thermal conductivity to build by laying bricks or stones, and its effect also will cut off in flame and the stove, and the heat of combustion chamber is transferred in the stove except supporting furnace roof.Gas entry, air intake (double as exhanst gas outlet) and special waste heat recovery aperture heat storage are all arranged at the two ends of each combustion chamber.By special transfer valve, coal gas, air are regularly switched from a certain section of two ends enter combustion chambers burn, meanwhile flue gas is switched from the former air mouth of pipe of another section and is drawn out of.Near the burner ends top explosion stack and blind plate are being housed, outside the combustion chamber, are having little space and manhole pipe to be in communication with the outside for operation and maintenance.The lattice hole Heat Storing Wall that has several to build by laying bricks or stones in the cross section, combustion chamber with refractory brick.There is being gas pipe to feed in the continuous tunnel furnace near outlet inside door appropriate location.
The relative prior art of the utility model has following beneficial effect:
1, the semi-fluid journey is wet method operation (adding water stirring, briquetting, drying) before the utility model operation, and later half flow process is piece type operation (goes into stove, reduces, comes out of the stove, passivation, storage), does not have dust pollution, and operating environment is fine;
2, with the type of furnace ratio of other various DRIs, this type of furnace only need consume and go back raw coal, does not need or seldom mends for coal combustion (or outer for burning coal gas).Required chemical energy, the heat energy of reduction reaction is from originating from disappear (the coal gas CO of reduction reaction by-product and the fugitive constituent H of coal
2, CO, CnHm, in stove, extract out earlier, this process utilizes coal gas to make the physics latent heat of carrier with the iron block that reduced in the stove, takes the stove tail to and conducts heat from burner and give the vehicle-mounted briquetting of just having gone into stove; Coal gas is extracted out outside the stove, (H after cooled dehydrated
2Reduced iron by-product H
2O), a part is kept reduction reaction temperature for the combustion chambers burn heat release, and a part blasts in the stove from the gas pipe of burner, makes the burner hot iron piece that has reduced cooling to be come out of the stove, and coal gas takes physics latent heat the preheating of to stove tail and goes into the furnace pressure piece; Blast in the coal gas of burner and be rich in H
2(about 40%) and CnHm (about 8%), CnHm run into high temperature, high porosity, highly active sponge iron catalytic pyrolysis and become CO and H
2, improved the reducing power of coal gas thus.When this kind coal gas passes the reduction section of the highest temperature, H
2, the CO hydrogen reduction of capturing iron oxide tap a blast furnace (hydrogen reducing is main), the water vapour of reduction reaction by-product has recovered the reducing power of coal gas again after cooled dehydrated, the fugitive constituent that mixes the coal of middle-temperature section effusion blasts from burner, meet high temperature iron, further improved the reducing power of coal gas behind the CnHm catalytic pyrolysis, moved in circles and satisfied required chemical energy and the heat energy of reduction reaction.
3, owing to do not need outer supplying heat source, this law energy consumption is very low; The hydrogen reduction of significant proportion is particularly arranged, compare H with carbon reduction
2Taking hydrogen reduction iron by force with C, to consume equivalent identical, but H
2Be 1/6 of C weight, the phase specific energy consumption is extremely low;
4, do not need outer supplying heat source, that is reduced discharging; H
2Reduction generates H
2O, after dehydration, total emission volumn is still less; Particularly reduced discharging greenhouse gases CO
2Discharging;
5, omnidistance reducing atmosphere in this law stove, the outer combustion chamber of partition wall stove is an oxidizing atmosphere, and operation is easily controlled, and product quality is very stable;
6, owing to adopted the aperture heat storage to reclaim fume afterheat, the air themperature of going into the combustion chamber can reach more than 500 ℃, and is not only energy-conservation, and flame stabilization, and some Heat Storing Wall have played the effect of stable furnace temperature again, make the whole operation process easily simple;
7, the partition wall of stove both sides and combustion chamber be equivalent to by " jar " of canned method, but this law neither needs tinning, has avoided the trouble of operation, the running of comparing jar, and the partition wall of this law does not have cold and hot frequent exchange problem, and the life-span is high.
8, coal-based gentle basic two kinds of reducing process that this law is very simply and dexterously compatible combine the advantage of two kinds of reducing process;
9, the changeable very easy realization of this law, as coke oven, only needing to increase number in parallel has just increased production capacity, and in parallel more energy-conservation than single stove, and the one, reduced the combustion chamber relatively, the 2nd, parallel connection makes the insulation of furnace wall performance better.
10, take up an area of than other stove, kiln type lack, small investment, operating cost is low.
Description of drawings:
Figure 0 is an energy-conservation tunnel reduction furnace longitudinal section
Fig. 1 is the 1-1 sectional elevation of figure 0
Fig. 2 is the 2-2 sectional elevation of figure 0
Fig. 3 is the 3-3 sectional elevation of figure 0
Fig. 4 is the 4-4 sectional elevation of figure 0
Fig. 5 is the 5-5 sectional elevation of figure 0
Fig. 6 is the 6-6 sectional elevation of figure 0
Among the figure: the 1-external door (steel weldering) that enters the mouth, (the steel weldering of 2-inlet inside door, water-cooled), 3-takes out gas butterfly valve (outsourcing), 4-takes out gas vent (refractory brick is built by laying bricks or stones), 5-manhole tube, lid (steel weldering), 6-wind/fume pipe (steel weldering), 7-coal combustion tracheae (steel pipe), 8-transfers wind/cigarette butterfly valve (outsourcing), 9-transfers gas butterfly valve (outsourcing), 10-aperture heat storage (porcelain, outsourcing), the 11-explosion stack, blind plate (steel pipe, the rubber asbestos slate), 12-macropore lattice Heat Storing Wall (fire-resistant brick), 13-reducing gas pipe (steel pipe), (the steel weldering of 14-outlet inside door, water-cooled), (the steel weldering of 15-outlet external door, water-cooled), 16-reduced iron briquetting, 17-tunnel car, 18-track, the 19-gas burner, the 20-cone-shaped hood, 21-cooler, 22-dehydrator, the 23-air-introduced machine, the 24-gas holder.
The specific embodiment:
In conjunction with the accompanying drawings the specific embodiment of the present utility model is described further, embodiment is used for illustrating of the present utility model, rather than it is imposed any restrictions.
By figure 0 as seen, energy-conservation tunnel reduction furnace at first is a straight tube masonry of droping to the ground with the door sealing.At its two, left and right sides respectively by inlet external door 1 and outlet external door 15 with whole combustion flue and extraneous sealing (open respectively during into and out of car, but the sealing of two inside doors).
By figure 0 as seen, the space on tunnel car 17 tops is further sealed (two external doors sealing when car advances, two inside doors are opened simultaneously) by inlet inside door 2 and outlet inside door 14 at energy-conservation tunnel reduction furnace respectively near two ends, the left and right sides in conjunction with Fig. 6.
By figure 0 as seen in conjunction with Fig. 1, in furnace wall bottom, both sides (suitable) with the car baseplane height of tunnel car 17 near inlet inside door 2 appropriate locations, build into several by laying bricks or stones with refractory brick and take out gas vent 4, by pipeline, take out gas butterfly valve 3 and gas main, cooler 21, dehydrator 22, air-introduced machine 23, gas holder 24 (only being signal in 4 term diagrams of back) UNICOM.By gas holder coal gas is distributed to coal combustion tracheae 7 and reducing gas pipe 13.
By figure 0 as seen, outside the furnace wall of both sides, reduction furnace middle part, a gas burner 19 is arranged respectively in conjunction with Fig. 2, Fig. 3, Fig. 4.
By figure 0 in conjunction with Fig. 4 as seen, certain thickness aperture heat storage 10 is equipped with at two, the left and right sides of gas burner 19, and near the position aperture heat storage of both sides, the top of gas burner 19 are equipped with and are led to extraneous explosion stack, blind plate 11.
By figure 0 in conjunction with Fig. 2, Fig. 4 as seen, 19 outside, two has one for the space of transferring valve and maintenance in the gas burner, and this space communicates with the external world by cat ladder and manhole tube, lid 5.Cone-shaped hood in this space with several steel welderings covers aperture heat storage 10, and the central authorities of cone-shaped hood are connected with wind/fume pipe 6, and every wind/fume pipe 6 all is equipped with accent wind/flue gas butterfly valve 8; In the both sides of each cone-shaped hood, that is the both sides of each aperture heat storage 10 are equipped with the coal combustion tracheae 7 that feeds gas burner 19, and every coal combustion tracheae 7 all is equipped with transfers gas butterfly valve 9.
By figure 0 as seen, on furnace roof, reducing gas pipe 13 is housed near 14 1 parking stalls of outlet inside door in conjunction with Fig. 5.
Specific implementation process of the present utility model is as follows:
(1), early-stage preparations
1, Iron Ore Powder, brown coal face, agstone, binding agent are prepared burden with certain proportion;
2, the moisturizing of above-mentioned four kinds of material stirs;
3, high pressure briquetting (wet strength 〉=3MPa) and sign indicating number car (all automations, this legend be yard 10 layers);
4, vehicle-mounted briquetting is gone into the dry kiln preheating and drying, improves intensity (the dry kiln thermal source is that reduction furnace combustion chamber, tunnel sees through the flue gas that the aperture heat storage is discharged);
5, dry good vehicle-mounted briquetting heads into the tunnel reduction furnace till the position of combustion chamber.
(2), some stove
1, by figure 0 and shown in Figure 2, coal combustion tracheae 7 and wind/fume pipe 6 are outer with zero the time mends coal gas and air is delivered to gas burner's 19 burnings, (necessarily pay special attention in the combustion chamber, to light in advance in advance the liquefied gas naked light before this, after the burning indoor temperature is higher than the coal gas burning-point, just can spread naked light);
2, opening smoke induced draught fan extracts the wind/fume pipe 6 of flue gas 19 opposite sides from the gas burner of gas-fired out;
3, note to adjust the amount of sending into and the air inducing amount of coal gas and wind, ascending growing from weak to strong, the some stove fire hardening cracks the partition wall of gas burner 19 and combustion flue too greatly easily, and partition wall has the crack just to cannot say for sure the reducing atmosphere of combustion flue;
When 4, the fugitive constituent that reaches coal when temperature in the combustion flue overflows temperature, open the coal gas air-introduced machine and gas butterfly valve 3 is taken out in fine setting, make to keep little negative pressure in the combustion flue, the fugitive constituent incendivity gas of the extraction interim outer coal gas amount of mending of progressively substituting is until replacing.
5, after chamber temperature reaches the coal gas burning-point, except that removing naked light, open automatic four-way change-over valve (about 30 seconds change once to) and automatic cut-off valve for gas, allow coal gas and air enter the combustion chamber from the left and right gas pipe shown in the figure 0 and wind/fume pipe 6 respectively, the while flue gas replaces from the right side shown in the figure 0, left wind/fume pipe 7 is extracted out, this moment, the waste heat of flue gas was reclaimed by the aperture heat storage, alternately the air that is passed the aperture heat storage after the commutation is again brought waste heat into combustion chamber, reduce gas consumption, realize energy-saving and emission-reduction.
(3), operation
1, when temperature in the combustion flue reaches 1100-1200 ℃, quick generation coal (C) is captured the oxygen (O) in the Iron Ore Powder (iron oxide), the reaction of reduced iron in the reduced iron briquetting.A large amount of coal gas of by-product (CO) and fugitive constituent (H
2, CO, CnHm) gas, remove and supply with the combustion chambers burn heat release, keep outside the furnace temperature, can shunt a part of gaseous mixture (coal gas+fugitive constituent) and enter combustion flue near outlet by reducing gas pipe 13, rely on the draft of coal gas air-introduced machine, this part coal gas will be taken out gas vent 4 along what combustion flue flowed to that combustion flue enters the mouth, go against the stream with vehicle-mounted reduced iron briquetting 16, by way of the 19 corresponding combustion flue districts, gas burner of the highest temperature, the CO in the gaseous mixture, particularly H
2Play an active part in the reaction of taking the O reduced iron by force, the CnHm in the gaseous mixture is CO, H by the highly active reduced iron catalytic pyrolysis of high temperature
2, further participate in the reaction of taking the O reduced iron by force.
2, beginning top car (adding briquetting) in stove is at first opened inlet external door 1, enters the mouth in the combustion flue between external door 1 and the inlet inside door 2 newly mending roof, closes the external door 1 that enters the mouth;
3, open inlet inside door 2 then simultaneously and outlet inside door 14 will newly be mended roof and enter a parking stall, the iron tunnel car 17 that carries that has also soon reduced ejects a parking stall, the room that stops back tunnel car 17 central authorities is just over against two inside doors, and the car room is over against outlet inside door 14 shown in figure 0.Closing inlet inside door 2 and outlet inside door 14 reduces combustion flue space, car top with the tunnel and further seals;
4, open outlet external door 15, after the car reduced iron briquetting 16 that reduction is good is pulled out combustion flue, close outlet external door 15;
5, so move in circles, realize that energy-conservation tunnel reduction furnace is with coal, gas base directly reducing iron.
Claims (1)
1. energy-conservation tunnel reduction furnace, comprise combustion flue, it is characterized in that combustion flue is the straight tube tunnel of building by laying bricks or stones, its entrance and exit place uses liftable inlet inside door (2) respectively, inlet external door (1) and outlet inside door (14), outlet external door (15) sealing, the combustion flue bottom is provided with the track (18) of advancing for tunnel car (17), what each useful refractory brick was built by laying bricks or stones near the both sides furnace wall of inlet inside door (2) takes out gas vent (4), the reducing gas pipe (13) that feeds in the combustion flue is arranged on the furnace roof near outlet inside door (14), near outside both sides, the middle part furnace wall of combustion flue a gas burner (19) is being arranged respectively, the macropore lattice Heat Storing Wall (12) that in each gas burner (19), has several to build by laying bricks or stones with refractory brick, at the two ends of each gas burner (19) some aperture heat storages (10) are housed all, outside, two ends in each gas burner (19), all use cone-shaped hood (20) that each aperture heat storage group is being covered, cone-shaped hood (20) central authorities are connected with wind/fume pipe (6), and the coal combustion tracheae (7) of feeding gas burner (19) is arranged in each aperture heat storage group both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201390223U CN201653126U (en) | 2010-03-20 | 2010-03-20 | Energy-saving tunnel reducing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201390223U CN201653126U (en) | 2010-03-20 | 2010-03-20 | Energy-saving tunnel reducing furnace |
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| Publication Number | Publication Date |
|---|---|
| CN201653126U true CN201653126U (en) | 2010-11-24 |
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ID=43118367
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| CN2010201390223U Expired - Fee Related CN201653126U (en) | 2010-03-20 | 2010-03-20 | Energy-saving tunnel reducing furnace |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235823A (en) * | 2011-03-29 | 2011-11-09 | 中国恩菲工程技术有限公司 | Wide-bodied tunnel kiln for roasting lateritic nickel ore |
| CN103380345A (en) * | 2011-03-18 | 2013-10-30 | 日本碍子株式会社 | Tunnel kiln for firing porous ceramic material |
| CN103499208A (en) * | 2013-09-25 | 2014-01-08 | 天津市金桥焊材集团有限公司 | Welding rod baking production line capable of recycling heat energy |
| CN104232826A (en) * | 2014-10-21 | 2014-12-24 | 郭瑛 | Iron-making method with low grade refractory iron ore and equipment thereof |
| CN106369996A (en) * | 2016-08-29 | 2017-02-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Novel heat accumulating type tunnel kiln for magnetizing roasting or direct reduction of iron ore |
-
2010
- 2010-03-20 CN CN2010201390223U patent/CN201653126U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103380345A (en) * | 2011-03-18 | 2013-10-30 | 日本碍子株式会社 | Tunnel kiln for firing porous ceramic material |
| CN103380345B (en) * | 2011-03-18 | 2016-08-10 | 日本碍子株式会社 | Ceramic porous article burns till uses tunnel cave |
| CN102235823A (en) * | 2011-03-29 | 2011-11-09 | 中国恩菲工程技术有限公司 | Wide-bodied tunnel kiln for roasting lateritic nickel ore |
| CN102235823B (en) * | 2011-03-29 | 2014-03-26 | 中国恩菲工程技术有限公司 | Wide-bodied tunnel kiln for roasting lateritic nickel ore |
| CN103499208A (en) * | 2013-09-25 | 2014-01-08 | 天津市金桥焊材集团有限公司 | Welding rod baking production line capable of recycling heat energy |
| CN103499208B (en) * | 2013-09-25 | 2016-06-08 | 天津市金桥焊材集团有限公司 | A kind of by the welding rod baking production line of heat energy recycling |
| CN104232826A (en) * | 2014-10-21 | 2014-12-24 | 郭瑛 | Iron-making method with low grade refractory iron ore and equipment thereof |
| CN106369996A (en) * | 2016-08-29 | 2017-02-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Novel heat accumulating type tunnel kiln for magnetizing roasting or direct reduction of iron ore |
| CN106369996B (en) * | 2016-08-29 | 2018-07-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of heat accumulating type tunnel oven for iron ore magnetizing roast or direct-reduction |
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