CN101787435A - Efficient spray rotation drum type cooling machine for reduced iron - Google Patents
Efficient spray rotation drum type cooling machine for reduced iron Download PDFInfo
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- CN101787435A CN101787435A CN201010029029A CN201010029029A CN101787435A CN 101787435 A CN101787435 A CN 101787435A CN 201010029029 A CN201010029029 A CN 201010029029A CN 201010029029 A CN201010029029 A CN 201010029029A CN 101787435 A CN101787435 A CN 101787435A
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Abstract
The invention relates to an efficient spray rotation drum type cooling machine for reduced iron, comprising a drum body part and a drive system. The drum body part comprises a feeding unit, a cooling unit and a discharging unit; the cooling unit comprises a cooling section drum body (6), a front end drum body (4) and a tail end drum body (7), and the front end drum body (4) and the tail end drum body (7) are connected with both ends of the cooling section drum body (6); the front end drum body and the tail end drum body are both two-layer drum bodies with the same structure, and the two-layer drum body adopts spray cooling inside; the surface of the drum body of the whole cooling unit is covered by spray cooling water, and the spray cooling water is circulating water; ceramic fiber cloth (14) and nitrogen gas curtains are adopted for sealing between the front end drum body and a feeding drum body (3) in the feeding unit and between the tail end drum body and a discharging drum body (8) in the discharging unit so as to prevent the oxidation of reduced iron pellets through the drum body part at high temperature. In the invention, atomized water droplets are sprayed through a nozzle between the two-layer drum bodies, and thereby the whole drum body is covered by the atomized water droplets; the drum body is effectively protected, the deformation is reduced, and the operating rate and the reliability of equipment are improved.
Description
Technical field
The invention belongs to and be used for the metallurgical mine industry is carried out cooling operations to reduced iron pelletizing, sintered balls nodulizing efficient spray rotation drum type cooling machine.
Background technology
Cooling is one of important procedure of calcining reduction ironworker journey.The direct-reduced iron pelletizing up to 1100 ℃, enters cooling cylinder through chute through the temperature of rotary hearth furnace or rotary kiln outlet, and material moves to discharge end having the cooling cylinder internal rotation at inclination angle by feed end.Most of in the world at present Iron And Steel Company all adopts water coolant directly to spray cylindrical shell to reach cooling performance, and cylindrical shell length generally reaches 30～40m.Direct-reduced iron factory of Tianjin Steel Pipe Co., Ltd. is present output in domestic maximum, the state-of-the-art direct-reduced iron of equipment manufacturing enterprise, it introduces the Britain direct-reduced iron DRC of Dai Wei company coal-based rotary kiln production technology, and the cooler of direct-reduced iron adopts water spray cooling technology indirectly.Domestic other reduced iron manufacturer, as fuyun Kingsoft mining and metallurgy company direct-reduced iron production equipment of a noise made in coughing or vomiting left side, Liaoning, middle areas in Shandong Province mine company, Beijing Miyun, Huadian, Jilin and the middle smelting vast of heaven autonomous design of going into operation recently, all be the mode that adopts waterfall water spray.There is following shortcoming in the mode of this waterfall water spray:
(1) cooling efficiency is lower.The heat transfer type of water spray cooling technology is based on the thermal convection between the thermal conduction between reduced iron pelletizing and the cylindrical shell and water coolant and the cylindrical shell indirectly, and the complex heat transfer coefficient of this type of cooling is very low, is 200～300W/m
2K does not make full use of the latent heat of vaporization of water, therefore, is to satisfy the cooling requirement, needs very big cooling cylinder diameter, water spray and very long cooling section and the residence time of reduced iron pelletizing.With Tianjin Steel Pipe Co., Ltd. is example, and its cooling cylinder diameter is Φ 3.5m, and cooling section length is 35m, and water spray is 456m
3/ h, residence time of material reaches 1h.
(2) poorly sealed.At present the static and dynamic sealing of cooler feed end and discharge end adopts stacked spring plate sealing mostly, seals tightly inadequately, causes air admission cylindrical shell redox iron, influences quality product.
(3) barrel distortion is serious.Because the cylindrical shell feeding temperature is up to 1100 ℃, and cylindrical shell does not have the water coolant protection at supporting part and driving part, therefore very high to the requirement of material, the distortion of cylindrical shell is serious, thereby causes taking turns the serious wear between band and support roller, pinion(gear) and the bull gear.
Summary of the invention
Technical problem to be solved by this invention is: in order to solve problems of the prior art, a kind of highly-efficient barrel-type cooler of forcing the type of cooling with spray water is provided, under identical output requires, improve cooling efficiency, reduce the consumption of making steel consumption, cost and energy source and power, improve the operating rate and the reliability of sealing property and equipment, improve the quality of products.
The technical scheme that the present invention solves its technical problem employing is: comprise shell portion and transmission system, described shell portion comprises feed unit, cooling unit and goes out material unit, cooling unit is made up of front end cylindrical shell and tail end cylindrical shell that the cooling section cylindrical shell links to each other with two ends with it, described front end is the identical double-layer barrel of structure with the tail end cylindrical shell, the inner spray cooling that adopts of this double-layer barrel, the drum surface of whole cooling unit is covered by spray cooling water, spray cooling hydromining recirculated water.Charging cylindrical shell in front end cylindrical shell and feed unit, tail end cylindrical shell and go out all to adopt between the discharging cylindrical shell in the material unit ceramic fiber cloth and the sealing of nitrogen gas curtain, oxidation at high temperature when preventing the reduced iron pelletizing by shell portion.
The present invention compared with prior art has following main advantage:
1. adopted novel spray water to force the type of cooling:
The cooler cooling section adopts the forced convection cooling of carburetion by spraying, the water droplets that forms certain size by the single channel pressure nozzle acts on the high temperature cylindrical shell, the vaporization potential of water droplets is taken away a large amount of heats, and its complex heat transfer coefficient can reach 950～1500W/m
2K improves cooling efficiency 50%.
2. adopted novel nitrogen pressure tightness system:
Change traditional stacked spring plate sealing, between cooler material feeding box, feed box and cylindrical shell, adopt ceramic fiber cloth+nitrogen pressure tightness system, discharge port adopts double-deck nitrogen gas curtain sealing, thereby can prevent air admission cooler redox iron ball group, improve the quality of reduced iron product, the rate of reducing the number of rejects and seconds, and easy to maintenance.
3. adopt double-layer barrel in cylindrical shell two supports part and driving part, spray into water droplets by nozzle between the double-layer barrel, make whole cylindrical shell be atomized the water droplet parcel, effectively protect cylindrical shell, reduce distortion, improve the operating rate and the reliability of equipment.
4. compact overall structure, floor space is little, can reduce and make steel consumption 40%, makes low cost of manufacture.
5. effectively energy-conservation: as can to reduce energy source and power 50%.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is blanking bin 2 and charging cylindrical shell 3, a discharging cylindrical shell 8 and go out the tightness system synoptic diagram of feed bin 9 among Fig. 1.
Fig. 3 is the A-A section of Fig. 1.
Fig. 4 is the feed opening nitrogen gas curtain synoptic diagram of blanking bin 9 among Fig. 1.
Fig. 5 is the structural representation of front end cylindrical shell 4 and tail end cylindrical shell 7 among Fig. 1.
Among the figure: 1. blanking chute; 2. blanking bin; 3. charging cylindrical shell; 4. front end cylindrical shell; 5. cooling cowl; 6. cooling section cylindrical shell; 7. tail end cylindrical shell; 8. discharging cylindrical shell; 9. go out feed bin; 10. front end support roller supporting; 11. tail end support roller supporting; 12. transmission system; 13. atomizing nozzle; 14. high-temperature ceramic fibre cloth; 15. pressure strip; 16. retaining plate; 17. retaining plate; 18. teflin ring; 19. nitrogen pipeline; 20. reinforcement gusset; 21. retaining plate; 22. sealed cylinder; 23. teflin ring; 24. limiting plate; 25. teflin ring; 26. limiting plate; 27. limiting plate; 28. sunk screw; 29. blanking bin housing; 30. nitrogen gas curtain pipeline; 31. pipeline flange; 32. input nitrogen tube; 33. pipeline; 34. flange; 35. mounting flange; 36. outer cylinder body; 37. wheel band; 38. backing plate; 39. axial limiting piece; 40. watertight shrouding; 41. inner barrel; 42. drive block; 43. curved baffle.
Embodiment
Efficient spray rotation drum type cooling machine for reduced iron provided by the invention, be a kind of cooler (abbreviation cooler) that the metallurgical mine industry is carried out operation to reduced iron pelletizing, sintered balls nodulizing that is used for, its structure as shown in Figure 1: comprise feeding part, shell portion, driving part, supporting part, spray cooling part, output section and hermetic unit.
Described feeding part is connected with reduced iron production technique upstream equipment, is used for the blanking of high temperature reduction iron ball group.Its structure is: form rectangle blanking chute by four blocks of Q235 steel plates, and wherein base plate and biside plate welding, three side welding dogs, and lay heat-resisting mould material; Upper cover plate is detachable, is connected by bolt with biside plate.
Described shell portion is carried and cooling segment for the reduced iron pelletizing, and its cylindrical shell feed end is the identical double-layer barrel of structure with discharge end, is respectively front end cylindrical shell 4 and tail end cylindrical shell 7 (see figure 5)s.Front end cylindrical shell 4 and tail end cylindrical shell 7, they all mainly are made up of outer cylinder body 36 and inner barrel 41.
Be the structure of example explanation double-layer barrel below with front end cylindrical shell 4.Wheel be with 37 and outer cylinder body 36 between, be provided with backing plate 38.Between outer cylinder body 36 and inner barrel 41, be provided with curved baffle 43, drive block 42.Curved baffle 43 is along the radial equipartition welding of flange 34.The mounting flange 35 that is weldingly connected with it is housed on outer cylinder body 36, radial equipartition along outer cylinder body 36 is welded with axial limiting piece 39, be welded with drive block 42 along cooling section cylindrical shell 6 radial equipartitions, be welded with the radial drive piece that matches with drive block 42 in outer cylinder body 36 inboards simultaneously. Curved baffle 43 and 39 mating reactions of axial limiting piece play the axial limiting effect to inner barrel 41 on drive block 42.This mode of connection can guarantee outer cylinder body 36 and cooling section cylindrical shell 6 location in the axial direction, and radial direction is rotated consistent.Be provided with watertight shrouding 40 in the cavity that between outer cylinder body 36 and inner barrel 41, forms; its effect is: water coolant enters nozzle by pipeline 33, forms the water droplets of narrow angle, the cavity between full outer cylinder body 36 and the inner barrel 41; the protection inner barrel plays cooling effect simultaneously.
Described driving part is arranged in the cylindrical shell discharge end, by driven by motor step-down gear, pinion(gear) and bull gear, drives cylindrical shell and rotates, and is used to carry the reduced iron pelletizing.Its structure is: motor is by the shaft coupling drive speed reducer, and the step-down gear output terminal is by chain wheel drive shaft pinion one end sprocket wheel, and the pinion(gear) two ends are by bearing block support, and bearing support is fixed on the ground pedestal.Pinion(gear) cooperates with bull gear, and bull gear is connected by spring plate and outer cylinder body 6, rotates thereby drive cylindrical shell.
Described supporting part is two grades of supportings; The first retaining supporting is identical for 11, two grades of supporting structures of tail end support roller supporting for 10, the second grades of supportings of front end support roller supporting, and its concrete structure is two support roller bogie wheel bands, and the wheel band cooperates with cylindrical shell.The center of two support rollers is 60 ° with the angle of the wheel band line of centres, and promptly the support roller center and the wheel band line of centres and vertical direction angle are 30 °.Support roller is by two support roller base supports, and the support roller base is fixed on the ground pedestal.
Bull gear transmission, two grades of support roller supportings place are adopted double-layer barrel, protection transmission and supporting.Carry out the water spray cooling in the double-layer barrel to bull gear transmission, two grades of support roller supportings place, can effectively protect inner barrel.
Described spray cooling partly is by the differing temps section, adopt the nozzle of different model and multi-form laying efficiently to cool off, the inner spray cooling that adopts of the double-layer barrel of cylindrical shell feed end and discharge end, whole drum surface is covered by spray cooling water, improves cooling efficiency and protection cylindrical shell; Spray cooling hydromining recirculated water is used to reduce resource.Its structure is as shown in Figure 3: lay atomizing nozzles 13 around cooling section cylindrical shells 6 in that cooling cowl 5 is inner, cooling cowl 5 bottoms are water tank, the storage recirculated cooling water, supply with atomizing nozzle by water pump and pipeline, the trickle water droplet that atomizing nozzle forms is distributed in the circular surface of cooling section cylindrical shell 6, by the vaporization potential of trickle water droplet, take away a large amount of heats, realize efficiently cooling.
The present invention adopts the forced convection cooling of carburetion by spraying, and the forced convection refrigerative method of this carburetion by spraying can guarantee effectively that reduced iron pelletizing cooling temperature reduces to below 300 ℃ fast.
Described output section is connected with reduced iron production technique upstream device, is used for the discharging of low-temperature reduction iron ball group.Its structure is: the length that discharging cylindrical shell 8 puts in out feed bin 9 is 150mm, and going out feed bin 9 bottoms has a taper feed opening, and the feed opening place adopts the sealing of nitrogen gas curtain.
Described hermetic unit comprises the static and dynamic sealing of cylindrical shell and feeding part, cylindrical shell and output section, for example: blanking bin 2 and charging cylindrical shell 3, discharging cylindrical shell 8 and go out all to adopt between the feed bin 9 the nitrogen gas curtain and ceramic fiber cloth sealing are used to prevent the oxidation at high temperature of reduced iron pelletizing.Be described with the example that is sealed between blanking bin 2 and the charging cylindrical shell 3 below.
Referring to Fig. 2: retaining plate 16 and 17 clamps high-temperature ceramic fibre cloth 14 by bolt, and pressure strip 15 is pressed in the surface of charging cylindrical shell 3 with high-temperature ceramic fibre cloth 14, realizes certain pressure.Lay the teflin ring 18,23 and 25 of three annulars between charging cylindrical shell 3 and the sealed cylinder 22, axially the positioning of teflin ring by retaining plate 17 and 21, limiting plate 24,26 and 27, and adopt sunk screw 28 bolts tight.Weld fixingly between retaining plate 21 and sealed cylinder 22 and retaining plate 17 and the sealed cylinder 22, and be provided with and strengthen gusset 20.Form the annular cavity between the limiting plate 26 and 27, nitrogen enters annular cavity by nitrogen pipeline 19, forms certain pressure, goes out a spot of effusion can be arranged from teflin ring and high-temperature ceramic fibre cloth, effectively prevent the air admission cylindrical shell of outside, prevent the oxidation of reduced iron pelletizing.
The feed opening gas curtain that goes out feed bin 9 seals as shown in Figure 4: two nitrogen gas curtain pipelines 30 are housed in the inner chamber of blanking bin housing 29, two nitrogen gas curtain pipelines 30 have staggered square opening, guarantee to form airtight gas curtain at the feed opening place, effectively prevent the air admission cylindrical shell of outside, prevent the oxidation of reduced iron pelletizing.Two input nitrogen tube 32 link to each other with two nitrogen gas curtain pipelines 30 by pipeline flange 31.
Described nitrogen gas curtain is that nitrogen enters two nitrogen gas curtain pipelines 30 that have square opening respectively by two input nitrogen tube 32, forms the nitrogen gas curtain.
The working process of this cooler is: the reduced iron pelletizing about 1100 ℃ enters charging cylindrical shell 3 through blanking chute 1, cooler is realized two grades of supportings by supporting 10 of front end support roller and tail end support roller supporting 11, transmission system 12 drives charging cylindrical shell 3, front end cylindrical shell 4, cooling section cylindrical shell 6, tail end cylindrical shell 7, discharging cylindrical shell 8 is realized rotatablely moving, (rotation mode is identical with rotary kiln at the cylindrical shell internal rotation of the cooling section cylindrical shell 6 that has the inclination angle for the reduced iron pelletizing, contain the shelves wheel), move to discharge end by feed end, in the cylindrical shell of cooling section cylindrical shell 6, carry out the spray cooling of indirect mode.
The present invention described herein is easy to change on specifically described content basis, revises and/or replenishes, and is understandable that all these change, revise and/or additional all being included in the spirit and scope of foregoing description of the present invention.
Claims (10)
1. an efficient spray rotation drum type cooling machine for reduced iron comprises shell portion and transmission system, it is characterized in that:
Described shell portion comprises feed unit, cooling unit and goes out material unit, cooling unit is made up of front end cylindrical shell (4) and tail end cylindrical shell (7) that cooling section cylindrical shell (6) links to each other with two ends with it, described front end is the identical double-layer barrel of structure with the tail end cylindrical shell, the inner spray cooling that adopts of this double-layer barrel, the drum surface of whole cooling unit is covered by spray cooling water, spray cooling hydromining recirculated water;
Charging cylindrical shell (3) in front end cylindrical shell (4) and feed unit, tail end cylindrical shell (7) and go out all to adopt between the discharging cylindrical shell (8) in the material unit ceramic fiber cloth (14) and the sealing of nitrogen gas curtain, oxidation at high temperature when preventing the reduced iron pelletizing by shell portion.
2. efficient spray rotation drum type cooling machine for reduced iron according to claim 1, it is characterized in that described double-layer barrel mainly is made up of outer cylinder body (36) and inner barrel (41), wherein: between described outer cylinder body and inner barrel, be provided with curved baffle (43), drive block (42), this drive block welds along cooling section cylindrical shell (6) radial equipartition, and contacts continuous with axial limiting piece (39); Be welded with the radial drive piece that matches with drive block (42) in outer cylinder body (36) inboard.
3. efficient spray rotation drum type cooling machine for reduced iron according to claim 2, it is characterized in that the radial equipartition welding of curved baffle (43) along flange (34), this flange is to link together with the mounting flange (35) that is welded on the outer cylinder body (36), curved baffle (43) and axial limiting piece (39) mating reaction play the axial limiting effect to inner barrel (41) on the drive block (42) that is weldingly connected with inner barrel (41).
4. efficient spray rotation drum type cooling machine for reduced iron according to claim 2 is provided with watertight shrouding (40) in the cavity that it is characterized in that forming between outer cylinder body (36) and inner barrel (41).
5. efficient spray rotation drum type cooling machine for reduced iron according to claim 2 is characterized in that being provided with backing plate (38) between the wheel band (37) of outer cylinder body (36) and transmission system.
6. efficient spray rotation drum type cooling machine for reduced iron according to claim 1, it is characterized in that cooling cowl (5) being housed in the outside of described cooling section cylindrical shell (6), inner at cooling cowl (5) around cooling section cylindrical shell (6) laying atomizing nozzle (13), cooling cowl (5) bottom is a water tank, the storage recirculated cooling water, supply with atomizing nozzle by water pump and pipeline, the trickle water droplet that atomizing nozzle forms is distributed in the surface of cooling section cylindrical shell (6).
7. efficient spray rotation drum type cooling machine for reduced iron according to claim 1, it is characterized in that described high-temperature ceramic fibre cloth (14) is clamped by bolt by two retaining plates, and high-temperature ceramic fibre cloth (14) is pressed in the surface of charging cylindrical shell (3) by pressure strip (15).
8. efficient spray rotation drum type cooling machine for reduced iron according to claim 7, it is characterized in that described high-temperature ceramic fibre cloth (14) is clamped by bolt by two retaining plates, and high-temperature ceramic fibre cloth (14) is pressed in the surface of discharging cylindrical shell (8) by pressure strip (15).
9. efficient spray rotation drum type cooling machine for reduced iron according to claim 7, it is characterized in that between each parts of feed unit, going out between each parts of material unit, all adopt the sealing of ceramic fiber cloth and nitrogen gas curtain, to prevent the making oxidation of reduced iron pelletizing in the described cooler of air admission.
10. according to claim 1 or 9 described efficient spray rotation drum type cooling machine for reduced iron, it is characterized in that described nitrogen gas curtain is that nitrogen enters two nitrogen gas curtain pipelines (30) that have square opening respectively by two input nitrogen tube (32), forms the nitrogen gas curtain.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010100290294A CN101787435B (en) | 2010-01-19 | 2010-01-19 | Efficient spray rotation drum type cooling machine for reduced iron |
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| CN2010100290294A CN101787435B (en) | 2010-01-19 | 2010-01-19 | Efficient spray rotation drum type cooling machine for reduced iron |
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| CN102031365A (en) * | 2010-11-09 | 2011-04-27 | 廖维秀 | Air-tight water cooling device |
| CN102586532A (en) * | 2012-03-08 | 2012-07-18 | 江苏沙钢集团有限公司 | Direct reduction iron cooling device |
| CN105039689A (en) * | 2015-09-11 | 2015-11-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Fast cooling device and method for iron ore tunnel kiln high-temperature reduction materials in kiln |
| CN105074020A (en) * | 2013-02-25 | 2015-11-18 | 杰富意钢铁株式会社 | Continuous annealing device and continuous hot-dip galvanising device for steel strip |
| CN105109102A (en) * | 2015-07-16 | 2015-12-02 | 广西鹿寨桂浙塑料包装有限公司 | Inner viscous film compounding machine |
| CN110193529A (en) * | 2019-06-17 | 2019-09-03 | 中国重型机械研究院股份公司 | A kind of extruder cleaning pad cooling device and its application method |
| CN111154973A (en) * | 2020-01-20 | 2020-05-15 | 武汉理工大学 | Integrated wheel belt and ribbed wall surface spraying rotary drum cooling machine comprising same |
| CN112795778A (en) * | 2021-02-04 | 2021-05-14 | 宝武集团环境资源科技有限公司 | High-temperature reduction pellet cooling device for rotary hearth furnace |
| CN114111324A (en) * | 2021-11-12 | 2022-03-01 | 南京年达炉业科技有限公司 | Electric heating negative electrode material sintering rotary kiln |
| CN115505732A (en) * | 2022-09-05 | 2022-12-23 | 武汉理工大学 | Rotary drum type multi-field cooperative efficient cooling device for reduced iron |
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| CN2183502Y (en) * | 1993-08-03 | 1994-11-23 | 杨文灿 | Double-tube spiral-rolling water-cooling type slag dry-cooling machine |
| CN2444197Y (en) * | 2000-10-12 | 2001-08-22 | 韦智 | Double sleeve type high efficient cooler |
| CN2484404Y (en) * | 2001-05-24 | 2002-04-03 | 辽河石油勘探局工程技术研究院 | External-pressure soft-cloth thermal-stress compensator |
| CN201104134Y (en) * | 2007-10-23 | 2008-08-20 | 济南重工股份有限公司 | Water-cooled nitrogen gas sealing single-tube cooler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102031365A (en) * | 2010-11-09 | 2011-04-27 | 廖维秀 | Air-tight water cooling device |
| CN102586532A (en) * | 2012-03-08 | 2012-07-18 | 江苏沙钢集团有限公司 | Direct reduction iron cooling device |
| CN102586532B (en) * | 2012-03-08 | 2014-06-25 | 江苏沙钢集团有限公司 | Direct reduction iron cooling device |
| US9957585B2 (en) | 2013-02-25 | 2018-05-01 | Jfe Steel Corporation | Continuous annealing device and continuous hot-dip galvanising device for steel strip |
| CN105074020A (en) * | 2013-02-25 | 2015-11-18 | 杰富意钢铁株式会社 | Continuous annealing device and continuous hot-dip galvanising device for steel strip |
| CN105109102A (en) * | 2015-07-16 | 2015-12-02 | 广西鹿寨桂浙塑料包装有限公司 | Inner viscous film compounding machine |
| CN105039689A (en) * | 2015-09-11 | 2015-11-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Fast cooling device and method for iron ore tunnel kiln high-temperature reduction materials in kiln |
| CN110193529A (en) * | 2019-06-17 | 2019-09-03 | 中国重型机械研究院股份公司 | A kind of extruder cleaning pad cooling device and its application method |
| CN110193529B (en) * | 2019-06-17 | 2023-12-08 | 中国重型机械研究院股份公司 | Extruder cleaning pad cooling device and application method thereof |
| CN111154973A (en) * | 2020-01-20 | 2020-05-15 | 武汉理工大学 | Integrated wheel belt and ribbed wall surface spraying rotary drum cooling machine comprising same |
| CN112795778A (en) * | 2021-02-04 | 2021-05-14 | 宝武集团环境资源科技有限公司 | High-temperature reduction pellet cooling device for rotary hearth furnace |
| CN114111324A (en) * | 2021-11-12 | 2022-03-01 | 南京年达炉业科技有限公司 | Electric heating negative electrode material sintering rotary kiln |
| CN115505732A (en) * | 2022-09-05 | 2022-12-23 | 武汉理工大学 | Rotary drum type multi-field cooperative efficient cooling device for reduced iron |
| CN115505732B (en) * | 2022-09-05 | 2024-01-19 | 武汉理工大学 | Rotary drum type multi-field synergistic reduced iron efficient cooling device |
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| CN101787435B (en) | 2012-02-08 |
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