CN110181032A - A kind of metallurgy backpack cover - Google Patents
A kind of metallurgy backpack cover Download PDFInfo
- Publication number
- CN110181032A CN110181032A CN201910447546.4A CN201910447546A CN110181032A CN 110181032 A CN110181032 A CN 110181032A CN 201910447546 A CN201910447546 A CN 201910447546A CN 110181032 A CN110181032 A CN 110181032A
- Authority
- CN
- China
- Prior art keywords
- metallurgical
- backpack cover
- thermal insulation
- insulation material
- metallurgy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005272 metallurgy Methods 0.000 title claims abstract description 39
- 239000012774 insulation material Substances 0.000 claims abstract description 61
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 8
- 239000004917 carbon fiber Substances 0.000 claims abstract description 8
- 239000003365 glass fiber Substances 0.000 claims abstract description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000010276 construction Methods 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims abstract description 4
- 238000003491 array Methods 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 238000009413 insulation Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 10
- 230000006378 damage Effects 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 244000144985 peep Species 0.000 description 4
- 238000004321 preservation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 241001572175 Gaza Species 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000005308 flint glass Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
- B22D41/023—Apparatus used for making or repairing linings
Abstract
The invention discloses a kind of metallurgical backpacks cover, including shell and insulating；The shell includes metallurgical backpack cover shell or vacuum casting, is steel construction lid；The insulating is located at the inside of shell, by muti-piece thermal insulation material and support bar group at；The thermal insulation material is refractory glass fiber block or carbon fiber block；It is provided with that position is identical, the consistent through hole in aperture in every piece of thermal insulation material, thermal insulation material is strung by through hole by support rod and be fixedly connected with metallurgical backpack cover inner surface of outer cover, the support rod cross sectional shape matches with through hole；By the above-mentioned means, metallurgy backpack cover heat-resisting quantity provided by the invention is preferable, heat-insulating heat-preserving material is readily disassembled replacement, and whole service life is longer, and heat insulation effect is more preferable, and manufacturing method is simple, cost is relatively low.
Description
Technical field
The present invention relates to steel, metallurgy and nonferrous smelting equipment technical fields, more particularly to a kind of metallurgical backpack cover.
Background technique
Metallurgy packet refers in metallurgical production for smelting, transporting, containing the container of liquid, including ladle, tundish, ladle
Deng, be smelt link and continuous casting link important equipment, production circular flow in Warm status directly affect Sheng liquid temperature
The variation of degree, and then influence production technology, energy consumption and product quality.Since heat loss of the metallurgy packet in circular flow is most of
It is currently mostly by addition coverture or smelting caused by being the heat radiation and convective heat transfer process as its top opening and air
Golden backpack cover keeps the temperature metallurgy packet, wherein addition coverture refers to that a large amount of covertures of addition are covered in molten steel surface and are protected
Temperature, but coverture reacted with high-temperature molten steel after have an a large amount of dust generation, deteriorate operating environment, be easy to cause secondary pollution, and at
This is higher；In contrast, adding metallurgical backpack cover is then simpler, direct mode, this method simplicity easily applied, energy conservation and environmental protection, because
And it is widely used, but the heat insulation effect of metallurgical backpack cover and service life are then closely related with its material, structure.
Metallurgical backpack cover is mainly to be made of steel construction lid and the internal fireclay insulating refractory inlayed, current common heat-insulated
Material is usually castable, i.e., a kind of unsetting refractory material, needs when use to spray or be cast in metallurgical backpack cover after stirring
On, it is then dried, is also preheated before the use, time is longer；And castable is easy to happen cracking, takes off
The problems such as falling needs often to repair；Castable own absorption energy is more in insulating process, waste of energy, and heat insulation effect is paid no attention to
Think；And weight is larger, will increase lifting equipment burden, even with lightening casting material also there are still it is dry difficult, vulnerable to
Damage the problems such as low with service life.
In addition, the mosaic mode of heat-barrier material is broadly divided into whole insertion and is embedded in two ways one by one, wherein whole embedding
Enter to refer to and heat-barrier material is integrally fastened on metallurgical backpack cover, this method is easy to operate, but needs entirety more if having partial destruction
It changes, higher cost；It is embedded in one by one, refers to and heat-barrier material is divided into multiple fritters, each fritter is individually mounted at metallurgical packet
Process is cumbersome when covering, can pointedly replace impaired block in this way, but installing one by one, larger workload.
Summary of the invention
, heat insulation effect low based on heat-barrier material service life present in existing metallurgical backpack cover be undesirable and mosaic mode not
The problems such as reasonable, the present invention provides a kind of metallurgical backpack cover, by using refractory glass fiber or carbon fiber as thermal insulation material,
Improve the heat-resisting quantity and heat insulation effect of metallurgical backpack cover；And refractory glass fiber block or carbon fiber grouping are strung into progress detachably
Formula is fixed, replacement easy to operate and easy to disassemble；To obtain a kind of good heat insulation effect, long service life and lower-cost smelting
Golden backpack cover.
To achieve the goals above, present invention employs following technical solutions:
A kind of metallurgy backpack cover, including shell and insulating, it is characterised in that: the shell includes metallurgical backpack cover shell
Or vacuum casting, it is steel construction lid；The insulating is located at the inside of shell, by thermal insulation material and support bar group at；
The thermal insulation material is refractory glass fiber block or carbon fiber block；The thermal insulation material quantity is muti-piece, in every piece of thermal insulation material
Be provided with that position is identical, the consistent through hole in aperture, by support rod by through hole by thermal insulation material string and with metallurgical backpack cover
Inner surface of outer cover is fixedly connected, and the support rod cross sectional shape matches with through hole.
Further, the through hole runs through the center of one group of opposite face of thermal insulation material.
Further, the thermal insulation material is sequentially laid in metallurgical backpack cover inner surface of outer cover by the same direction, close-packed arrays,
And keep each through hole direction consistent, and be parallel to metallurgical backpack cover inner surface of outer cover, formed multiple groups can bunchiness thermal insulation material；Institute
Stating thermal insulation material outer shape can cut, for matching with the inside edge of metallurgical backpack cover shell.
Further, the support rod quantity is consistent with the group number that thermal insulation material is formed, and every support rod is along corresponding group
Thermal insulation material in through hole be pierced by, closely string this group of thermal insulation material；The cleavable adjustment of the length of the support rod, is used for
Match the length of each group thermal insulation material in metallurgical backpack cover shell；The support rod both ends are welded in metallurgical backpack cover inner surface of outer cover.
Further, the support rod is round tubular structure, and diameter of section is 2~20mm.
Further, there are many shapes for the metallurgical backpack cover shell, described for matching with metallurgy packet of different shapes
The shape of metallurgical backpack cover shell is consistent with the shape of corresponding metallurgy packet.
Further, the size of the metallurgical backpack cover shell is consistent with the packet mouth external dimensions of metallurgy packet.
Further, the metallurgical backpack cover shell is equipped with peep hole, and through the guarantor of corresponding position in insulating
Adiabator, for observing the situation in metallurgy packet, and convenient for adding drainage sand and conduction stick.
Further, the metallurgical backpack cover outer surface of outer cover is equipped with 4 lifting lugs, and the lifting lug is in metallurgical backpack cover shell
The heart is uniformly distributed for origin, for being covered and being lifted lid movement to metallurgy packet.
The beneficial effects of the present invention are:
1, metallurgical backpack cover provided by the invention by using refractory glass fiber or carbon fiber as thermal insulation material, and will be resistance to
Flint glass fiber block or carbon fiber grouping string and are fixed, and extend the service life of metallurgical backpack cover, and have and preferably protect
Temp effect, and manufacturing method is simple, cost is relatively low；
2, the refractory glass fiber or carbon fiber that the present invention uses have preferable heat-resisting quantity and lower thermal coefficient,
Its damage rate at high temperature can be reduced, the service life of metallurgical backpack cover is extended, and can be reduced heat conduction, improves metallurgy packet
The heat insulation effect of lid；
3, the present invention carries out detachable fixation by the way that thermal insulation material is perforated and is grouped using support rod to string, behaviour
Make simply, and convenient for carrying out disassembly replacement to the thermal insulation material of individual defects in use process, without whole replacements, extends smelting
The whole service life of golden backpack cover simultaneously reduces use cost.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of metallurgical backpack cover embodiment 1 of the present invention；
Fig. 2 is the A-A cross-sectional view of Fig. 1；
Fig. 3 is a kind of structural schematic diagram of metallurgical backpack cover embodiment 2 of the present invention；
Fig. 4 is a kind of structural schematic diagram of metallurgical backpack cover embodiment 3 of the present invention；
Fig. 5 is a kind of structural schematic diagram of metallurgical backpack cover embodiment 4 of the present invention；
The components in the drawings are labeled as follows: 1, shell；2, thermal insulation material；3, lifting lug；4, peep hole；5, support rod；6,
Insulating.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.Obviously,
Described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Based on implementation of the invention
Example, those of ordinary skill in the art's obtained all other embodiment without making creative work, all belongs to
In the range that the present invention is protected.
Embodiment 1
As depicted in figs. 1 and 2, a kind of metallurgical backpack cover provided in an embodiment of the present invention, including metallurgical backpack cover shell 1 and heat-insulated
Insulating layer 6, the metallurgy backpack cover shell 1 is steel construction lid；The insulating 7 is located at the inside of metallurgical backpack cover shell 1,
It is made of thermal insulation material 2 and support rod 5, the thermal insulation material is refractory glass fiber.
The shape of the metallurgy backpack cover shell 1 is circle, and outer diameter is consistent with the packet mouth outer diameter of metallurgy packet, for covering comprehensively
Metallurgy packet surface, improves heat insulation effect, while thermal insulation material 2 being avoided directly to contact with metallurgical packet mouth, to extend metallurgical backpack cover
Service life；The outer diameter of the shell of metallurgy backpack cover described in the present embodiment 1 is 800mm.
The metallurgy backpack cover shell 1 is equipped with the peep hole 4 that a diameter is 60mm, and corresponding in insulating
The thermal insulation material 2 of position；The peep hole 4 can be used for observing the situation in metallurgy packet, it can also be used to add drainage sand and conduction stick,
Meet that the metallurgy packet after metallurgy packet covers clear up, built by laying, the techniques such as mouth of a river gaza and conduction stick require.
1 outer surface of metallurgy backpack cover shell is equipped with 4 lifting lugs 3, and the lifting lug 3 is welded in metallurgical backpack cover shell 1
Outer surface is uniformly distributed using the center of metallurgical backpack cover shell 1 as origin, be easy to use lifting equipment to metallurgy packet carry out cover and
Lift lid movement.
The quantity of thermal insulation material 2 is muti-piece in the insulating 7, be provided in every piece of thermal insulation material 2 position it is identical,
The consistent through hole in aperture, and through hole runs through the center of 2 one groups of opposite faces of thermal insulation material, the through hole section is circle,
Diameter is 6mm；Thermal insulation material 2 is successively laid in the interior table of metallurgical backpack cover shell 1 by sequence from left to right, from top to bottom
Face, and each piece of 2 close-packed arrays of thermal insulation material, the heat-insulation and heat-preservation for metallurgical backpack cover；Each piece is kept when arranging thermal insulation material 2
Through hole direction in thermal insulation material 2 is consistent, and is parallel to the inner surface of metallurgical backpack cover shell 1, to make the heat preservation of every a line
Through hole in material 2 can be penetrated through sequentially；It regard the muti-piece thermal insulation material 2 of every a line as one group, obtaining multiple groups can bunchiness
Thermal insulation material 2.
The thermal insulation material 2 is cube structure, and original shape, size are all consistent, in alignment processes, the thermal insulating material
The outer shape of material 2 can be cut, for matching with the edge shape of metallurgical 1 inside of backpack cover shell, thus as far as possible
Improve the coverage rate of thermal insulation material 2 in metallurgical 1 inner surface of backpack cover shell, the heat insulation and preservation effect of the metallurgical backpack cover of enhancing gained.
The support rod 5 is the steel pipe that diameter is 6mm, and quantity is consistent with the group number that thermal insulation material 2 is formed, to guarantee
Support rod 5 can be corresponded with each group thermal insulation material；The through hole phase of the cross sectional shape of the support rod 5 and thermal insulation material 2
Matching, to guarantee that support rod 5 can be smoothly pierced by from through hole；By every support rod 5 along the thermal insulation material of corresponding group
Through hole passes through, and closely strings this group of thermal insulation material, and the both ends of support rod 5 are welded in the inner surface of metallurgical backpack cover shell 1,
To which thermal insulation material 2 to be fixed on to the inner surface of metallurgical backpack cover shell 1；The length of the support rod 5 can be according to metallurgical backpack cover
The total length of the thermal insulation material 2 of the size of shell 1 and corresponding group carries out cutting adjustment, to guarantee that the both ends of support rod 5 can be just
It is welded in the inner surface of the metallurgical backpack cover shell 1 of present position well.
When metallurgical backpack cover normal use, the thermal insulation material 2 is by the support rod for being welded on metallurgical 1 inside of backpack cover shell
5 are fixed；When metallurgical backpack cover after a period of use, if individual thermal insulation material 2 damages, need to only saw the individual of lower damage
Thermal insulation material on the support rod 5 is removed, and replaced to the thermal insulation material of damage by support rod 5 corresponding to thermal insulation material 2
It changes, reinsert new support rod 5 after replacement again and its both ends is welded in metallurgical 1 inside of backpack cover shell in the same manner,
It can continue to use；Whole dismounting replacement process is simple and convenient, cost is relatively low, and is conducive to extend the whole of metallurgical backpack cover and uses
Service life.
Embodiment 2~4
Compared with Example 1, embodiment 2~4 the difference is that the shape of metallurgical backpack cover shell is different, tie by correspondence
Structure schematic diagram is as seen in figures 3-5.
It can be seen from Fig. 3~5 it is provided by the invention metallurgy backpack cover be applicable to it is of different shapes metallurgy packet, using model
It encloses relatively wide.
The above is merely illustrative of the technical solution of the present invention, rather than is limited；Although referring to aforementioned implementation
Invention is explained in detail for example, those skilled in the art should understand that: it still can be to aforementioned implementation
Technical solution documented by example is modified, or equivalent substitution of some or all of the technical features；All benefits
The equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other phases
The technical field of pass, is included within the scope of the present invention.
Claims (9)
1. a kind of metallurgy backpack cover, including shell (1) and insulating (6), it is characterised in that: the shell (1) includes metallurgy
Backpack cover shell or vacuum casting are steel construction lid；The insulating (6) is located on the inside of shell (1), by thermal insulation material
(2) it is formed with support rod (5)；The thermal insulation material is refractory glass fiber block or carbon fiber block；Thermal insulation material (2) quantity
It for muti-piece, is provided with that position is identical, the consistent through hole in aperture in every piece of thermal insulation material (2), through hole is passed through by support rod (5)
Muti-piece thermal insulation material (2) is strung and is fixedly connected with metallurgical backpack cover shell (1) inner surface, support rod (5) cross sectional shape
Match with through hole.
2. a kind of metallurgical backpack cover according to claim 1, it is characterised in that: the through hole runs through thermal insulation material (2) one
The center of group opposite face.
3. a kind of metallurgical backpack cover according to claim 1, it is characterised in that: the thermal insulation material (2) is suitable by the same direction
It is secondary to be laid in metallurgical backpack cover shell (1) inner surface, close-packed arrays, and keep each through hole direction consistent, and be parallel to metallurgical packet
Cover housing (1) inner surface, formed multiple groups can bunchiness thermal insulation material (2)；Thermal insulation material (2) outer shape can be cut, and be used
Match in metallurgical backpack cover shell (1) inside edge.
4. a kind of metallurgical backpack cover according to claim 3, it is characterised in that: support rod (5) quantity and thermal insulation material
(2) the group number formed is consistent, and every support rod (5) is pierced by along the through hole in the thermal insulation material (2) of corresponding group, closely strings
This group of thermal insulation material (2)；The cleavable adjustment of length of the support rod (5) is protected for matching the interior each group of metallurgical backpack cover shell (1)
The length of adiabator (2)；Support rod (5) both ends are welded in metallurgical backpack cover shell (1) inner surface.
5. a kind of metallurgical backpack cover according to claim 1, it is characterised in that: the support rod (5) is round tubular structure,
Diameter of section is 2~20mm.
6. a kind of metallurgical backpack cover according to claim 1, it is characterised in that: there are many shapes for the metallurgy backpack cover shell (1)
Shape, for matching with metallurgy packet of different shapes, the shape one of the shape of the metallurgy backpack cover shell (1) and corresponding metallurgy packet
It causes.
7. a kind of metallurgical backpack cover according to claim 6, it is characterised in that: the size of the metallurgy backpack cover shell (1) with
The packet mouth external dimensions of metallurgy packet is consistent.
8. a kind of metallurgical backpack cover according to claim 1, it is characterised in that: the metallurgy backpack cover shell (1), which is equipped with, to be seen
It examines hole (4), and through the refractory material (2) of corresponding position in insulating, for observing the situation in metallurgy packet.
9. a kind of metallurgical backpack cover according to claim 1, it is characterised in that: described metallurgy backpack cover shell (1) outer surface is set
There are 4 lifting lugs (3), the lifting lug (3) is uniformly distributed using metallurgical backpack cover shell (1) center as origin, for carrying out to metallurgy packet
It covers and lift lid acts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910447546.4A CN110181032A (en) | 2019-05-27 | 2019-05-27 | A kind of metallurgy backpack cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910447546.4A CN110181032A (en) | 2019-05-27 | 2019-05-27 | A kind of metallurgy backpack cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110181032A true CN110181032A (en) | 2019-08-30 |
Family
ID=67718048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910447546.4A Pending CN110181032A (en) | 2019-05-27 | 2019-05-27 | A kind of metallurgy backpack cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110181032A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3634892A1 (en) * | 1986-10-14 | 1988-04-28 | Didier Werke Ag | FIRE RESISTANT LINING, ESPECIALLY FOR LID OF INTERMEDIATE CONTAINERS |
| KR200205874Y1 (en) * | 2000-06-23 | 2000-12-01 | 고려특수화학주식회사 | Tundish cover hole structures |
| KR20110022328A (en) * | 2009-08-27 | 2011-03-07 | 현대제철 주식회사 | Tundish cover structure |
| CN203695932U (en) * | 2013-12-06 | 2014-07-09 | 安徽博伟铸锻有限公司 | Insulation cover for steel ladle |
| CN205393520U (en) * | 2016-03-03 | 2016-07-27 | 中原特钢股份有限公司 | Light ladle cover |
| CN106623878A (en) * | 2016-11-17 | 2017-05-10 | 南京钢铁股份有限公司 | Continuous casting ladle cover and manufacturing method thereof |
| CN206392851U (en) * | 2016-12-16 | 2017-08-11 | 四川德胜集团钒钛有限公司 | A kind of light thermal-insulation steel ladle cover |
| CN210730968U (en) * | 2019-05-27 | 2020-06-12 | 武汉科技大学 | Metallurgical ladle cover |
-
2019
- 2019-05-27 CN CN201910447546.4A patent/CN110181032A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3634892A1 (en) * | 1986-10-14 | 1988-04-28 | Didier Werke Ag | FIRE RESISTANT LINING, ESPECIALLY FOR LID OF INTERMEDIATE CONTAINERS |
| EP0267366A1 (en) * | 1986-10-14 | 1988-05-18 | Didier-Werke Ag | Refractory lining, especially for tundish covers |
| KR200205874Y1 (en) * | 2000-06-23 | 2000-12-01 | 고려특수화학주식회사 | Tundish cover hole structures |
| KR20110022328A (en) * | 2009-08-27 | 2011-03-07 | 현대제철 주식회사 | Tundish cover structure |
| CN203695932U (en) * | 2013-12-06 | 2014-07-09 | 安徽博伟铸锻有限公司 | Insulation cover for steel ladle |
| CN205393520U (en) * | 2016-03-03 | 2016-07-27 | 中原特钢股份有限公司 | Light ladle cover |
| CN106623878A (en) * | 2016-11-17 | 2017-05-10 | 南京钢铁股份有限公司 | Continuous casting ladle cover and manufacturing method thereof |
| CN206392851U (en) * | 2016-12-16 | 2017-08-11 | 四川德胜集团钒钛有限公司 | A kind of light thermal-insulation steel ladle cover |
| CN210730968U (en) * | 2019-05-27 | 2020-06-12 | 武汉科技大学 | Metallurgical ladle cover |
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