CN203695941U - Steel ladle working lining - Google Patents
Steel ladle working lining Download PDFInfo
- Publication number
- CN203695941U CN203695941U CN201420017158.5U CN201420017158U CN203695941U CN 203695941 U CN203695941 U CN 203695941U CN 201420017158 U CN201420017158 U CN 201420017158U CN 203695941 U CN203695941 U CN 203695941U
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- Prior art keywords
- magnesia carbon
- slag line
- carbon brick
- brick
- working lining
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model relates to a steel ladle working lining, and belongs to the technical field of ferrous metallurgy steel ladle lining repairing. The steel ladle working lining is characterized in that after two or three layers of slag line lower single-ring magnesia carbon bricks (3) are built, the slag line magnesia carbon bricks are divided into slag line outer ring magnesia carbon bricks (1) and slag line inner ring magnesia carbon bricks (2) to be built in a double-ring mode, and one or two layers of single ring opening wrapping bricks (7) and pouring ladle edge castable (6) are built on the upper portions of the slag line magnesia carbon bricks from bottom to top in sequence. According to the steel ladle working lining, the safety and using performance of the steel ladle working lining is guaranteed, and energy consumption and cost of the slag line magnesia carbon bricks are saved by 20 percent to 30 percent on the year-on-year basis.
Description
Technical field
The utility model relates to a kind of method of building by laying of ladle working lining and slag lining thereof, belongs to Ferrous Metallurgy ladle liner and builds by laying technical field.
Background technology
Ladle is the container for steel-making shipment molten steel, is again the basic container of the liquid steel refining such as LF, RH stove, and its liner generally comprises permanent liner and working lining.In recent years, for meeting RH refining furnace Development and Production Ultra-low carbon to molten steel temperature drop and the requirement of carbon increasing amount technology controlling and process, RH ladle working lining adopts carbon-free or low-carbon (LC) working lining, and ladle working lining slag lining adopts magnesia carbon brick to build by laying bricks or stones, it is the ladle low-carbon (LC) working lining extensively adopting both at home and abroad at present that Bao Bi below slag line and position, bag bottom adopt the integrated poured synthetic operation lining of corundum-spinel pouring material, but existing ladle working lining structural design and build by laying and have following problem and shortage in method: slag line magnesia carbon brick all adopts single ring architecture design, for guaranteeing the safe application performance of ladle working lining, whenever the magnesia carbon brick of slag lining is residual thick while reaching 50～80mm, must roll off the production line inactive, to the magnesia carbon brick more renewing after the magnesia carbon brick complete removal of slag lining, cause thus the waste of the residual thick 50～80mm of being magnesia carbon brick, consumption and the cost of magnesia carbon brick are increased.
CN102941341A discloses a kind of method of brick ladle working lining sectional repair, comprising: slag line brick is mended and wrapped nogging by replacing a damaged part and mends by replacing a damaged part, and slag line brick is mended by replacing a damaged part and used inverted triangle to remove, and adopts original material, original brick type refractory brick to repair after removing; Bag nogging is mended the mode that uses partial lateral to remove by replacing a damaged part and is mended by replacing a damaged part, adopts pneumatic pick to remove by refractory brick serious damage and with two of left and right of ring brick.After removing, adopt original material, original brick type to repair.The deficiency of this utility model: it is high to mend technological requirement by replacing a damaged part, and technical difficulty is large, the ladle working lining safe application performance after mending by replacing a damaged part reduces, and easily wears bag accident.
CN201338090 discloses a kind of ladle working lining, formed by magnesia carbon brick structure (1) and castable structure (2) two parts, magnesia carbon brick structure (1) is built by laying bricks or stones in the inner side at ladle slag line position, and castable structure (2) is distributed in molten bath and position, bag bottom.The deficiency of this utility model: ladle slag line magnesia carbon brick adopts single ring architecture design, for guaranteeing the safe application performance of ladle working lining, it is residual thick that the magnesia carbon brick of slag lining must retain enough erosions, increased thus consumption and the cost of magnesia carbon brick.
Summary of the invention
Build by laying the defect of method for overcoming existing ladle integrated working lining structural design and slag lining, the utility model provides a kind of ladle working lining, not only guarantee the safe application performance of ladle working lining, and reduced on year-on-year basis consumption and the cost 20～30% of slag line magnesia carbon brick.
Terminological interpretation:
Working lining slag line magnesia carbon brick corrodes residual thick: ladle working lining roll off the production line light maintenance or in while repairing, the residual thickness after slag line magnesia carbon brick corrodes.
Ladle wall working lining castable is residual thick: ladle working lining roll off the production line light maintenance or in while repairing, the residual thickness after ladle wall working lining castable corrodes.
Ladle liner (as Fig. 1): be made up of permanent liner and working lining, wherein permanent liner comprises permanent liner heat insulation fireproof plate (11), material for permanent liner in pouring (12) is installed pocket block (8), ventilating seat brick (9) in underwrite lining work castable (5).
The technical solution of the utility model is as follows:
A kind of ladle working lining, comprise that ring magnesia carbon brick (2), slag line bottom monocycle magnesia carbon brick (3) in slag line outer shroud magnesia carbon brick (1), slag line, bag wall working lining castable (4), underwrite lining work castable (5), bag are along castable (6), monocycle bag mouth brick (7), it is characterized in that, ladle involucrum (10) inwall is laid permanent liner heat insulation fireproof plate (11), material for permanent liner in pouring (12) successively, and pocket block (8), ventilating seat brick (9) are installed in underwrite lining work castable (5); Be followed successively by underwrite lining work castable (5), bag wall working lining castable (4), slag line bottom monocycle magnesia carbon brick (3) from bottom to top on material for permanent liner in pouring (12) top at the bag end; Slag line bottom monocycle magnesia carbon brick (3) is 2～3 layers, on slag line bottom monocycle magnesia carbon brick (3), build slag line magnesia carbon brick by laying bricks or stones, slag line magnesia carbon brick is divided into ring magnesia carbon brick (2) two rings in slag line outer shroud magnesia carbon brick (1) and slag line builds by laying bricks or stones, and its top is built 1～2 layer of monocycle bag mouth brick (7), pouring ladle from bottom to top by laying bricks or stones successively along castable (6).In slag line, ring magnesia carbon brick (2) is built by laying bricks or stones near ladle involucrum (10) inwall; Slag line outer shroud magnesia carbon brick (1) is close to ring magnesia carbon brick (2) in slag line.
Described monocycle bag mouth brick (7), being close to ladle involucrum (10) inwall builds by laying bricks or stones, be without permanent liner heat insulation fireproof plate (11) and material for permanent liner in pouring (12) between monocycle bag mouth brick (7) and ladle involucrum (10), jointly ring magnesia carbon brick (2) in slag line outer shroud magnesia carbon brick (1) and slag line is formed to upper and lower " clamping " and left and right " integration " effect with slag line bottom monocycle magnesia carbon brick (3), to improve the overall performance of ladle liner, and then improve the safe application performance of ladle working lining.
Preferably, the length a of described slag line outer shroud magnesia carbon brick (1) is 48～82mm, and in slag line, the length b of ring magnesia carbon brick (2) is 118～172mm.
Preferably, the thickness c of described bag wall working lining castable (4) is 178～200mm, and the thickness m of underwrite lining work castable (5) is 348～400mm.
Preferably, in described slag line outer shroud magnesia carbon brick (1), slag line ring magnesia carbon brick (2) and slag line bottom monocycle magnesia carbon brick (3) to select the magnesia carbon brick trade mark be MT-14A.
Preferably, described monocycle bag mouth brick (7) aluminium magnesia carbon brick, its MgO+Al
2o
3content is that 72～76%, MgO content is that 10～14%, C content is 7～8%, and apparent porosity is 8～10%, and bulk density is 2.80～2.90g/cm
3, cold crushing strength is 40～55MPa, 0.2MPa refractoriness under load is 1600～1670 ℃.
The utility model also provides the method for building by laying of ladle working lining slag lining, comprise light maintenance and in repair two kinds and build by laying method, step is as follows:
1) method of building by laying of ladle working lining light maintenance and slag lining thereof:
The new working lining of ladle is reached the standard grade and is used 40～50 heats, in the time that slag line bottom monocycle magnesia carbon brick (3) corrodes the residual thick 110～130mm of being, implement ladle working lining light maintenance, minor repair method is to change pocket block (8), ventilating seat brick (9), monocycle bag mouth brick (7), pouring ladle is along castable (6), residual lining surface to bag wall working lining castable (4) and underwrite lining work castable (5) adopts corundum-spinel gunning refractory to carry out spray repair maintenance, retain with after slag line bottom monocycle magnesia carbon brick (3) and with after slag line in encircle magnesia carbon brick (2), only remove the slag line outer shroud magnesia carbon brick (1) after using, the slag line outer shroud magnesia carbon brick (1) more renewing,
2) in ladle working lining, repair and the method for building by laying of slag lining:
According to 1), ladle working lining light maintenance 2～3 times, in the time wrapping the residual thick 90～100mm of erosion of wall working lining castable (4), implement to repair in ladle working lining, in the method for repairing be to change pocket block (8), ventilating seat brick (9), monocycle bag mouth brick (7), pouring ladle along castable (6), the residual lining of bag wall working lining castable (4) and underwrite lining work castable (5) is carried out to peeling cover and water, change ring magnesia carbon brick (2) and slag line outer shroud magnesia carbon brick (1) in whole slag line bottom monocycle magnesia carbon bricks (3), slag line;
3) according to above-mentioned 1)～2) step, circulation is built by laying 7-9 time.
The technical characterictic that the utility model does not describe in detail, as peeling cover waters, all adopts prior art.
Circulation is built by laying after 7-9 time, the ladle permanent lining that should all more renew and working lining, comprise in ladle permanent lining heat insulation fireproof plate (11), material for permanent liner in pouring (12), bag wall working lining castable (4), underwrite lining work castable (5), slag line outer shroud magnesia carbon brick (1), slag line that ring magnesia carbon brick (2), slag line bottom monocycle magnesia carbon brick (3), monocycle bag mouth brick (7), bag are along castable (6).
Ladle permanent lining heat insulation fireproof plate, material for permanent liner in pouring, working lining bag wall castable, the material feeding of working lining bag bottom pour mold, gunning refractory, bag that the utility model relates to are state of the art along castable and pouring procedure.In the utility model method, be not particularly limited all by prior art.Wherein, material for permanent liner in pouring, working lining bag wall castable, the material feeding of working lining bag bottom pour mold, gunning refractory, bag all have product to sell along refractory materials such as castables in Xinemei Industry Co., Ltd., Jinan City, new material Co., Ltd of Su Jia group, Shanghai BaoMing fireresisting Materials Co., Ltd.
The beneficial effects of the utility model are:
1) the utility model ladle working lining slag line magnesia carbon brick is divided into ring magnesia carbon brick (2) two rings in slag line outer shroud magnesia carbon brick (1) and slag line and builds by laying bricks or stones, wherein when working lining light maintenance, do not remove ring magnesia carbon brick (2) in slag line, only change slag line outer shroud magnesia carbon brick (1), the method of building by laying of this ladle working lining structure and slag lining thereof, not only guarantee the safe application performance of ladle working lining, and than all methods of building by laying of replacing of slag line magnesia carbon brick in background technology, reduce on year-on-year basis consumption and the cost 20～30% of slag line magnesia carbon brick.
2) the utility model ladle working lining slag line bottom is built 2～3 layers of slag line bottom monocycle magnesia carbon brick (3) by laying bricks or stones and monocycle bag mouth brick (7) is close to the interior wall laying method of ladle involucrum (10), improve the overall performance of ladle liner, avoid taking out brick etc. and building by laying quality problems because " expanding with heat and contract with cold " acts on the slag line magnesia carbon brick causing, improved the safe application performance of ladle working lining.
3) when the utility model is to the light maintenance of ladle working lining working lining, do not remove ring magnesia carbon brick (2) in slag line, labour intensity that slag line magnesia carbon brick builds by laying and the discharge capacity of waste magnesia carbon brick are reduced, meet the industrial policy of current national energy-saving and emission-reduction, economic and social benefit is remarkable, has good application prospect and promotional value.
Accompanying drawing explanation
Fig. 1 is the utility model steel pack lining structure schematic diagram.
Wherein, 1-slag line outer shroud magnesia carbon brick, ring magnesia carbon brick in 2-slag line, 3-slag line bottom monocycle magnesia carbon brick, 4-bag wall working lining castable, 5-underwrite lining work castable, 6-wraps along castable, 7-monocycle bag mouth brick, 8-pocket block, 9-ventilating seat brick, 10-ladle involucrum, 11-permanent liner heat insulation fireproof plate, 12-material for permanent liner in pouring.
The specific embodiment
Following examples are that the method for building by laying of ladle working lining and slag lining thereof is further illustrated, but the utility model is not limited to this.
Embodiment 1:
As shown in Figure 1, a kind of ladle working lining, comprise that ring magnesia carbon brick 2 in slag line outer shroud magnesia carbon brick 1, slag line, slag line bottom monocycle magnesia carbon brick 3, bag wall working lining castable 4, underwrite lining work castable 5, bag are along castable 6, monocycle bag mouth brick 7, ladle involucrum 10 inwalls are laid permanent liner heat insulation fireproof plate 11, material for permanent liner in pouring 12 successively, at the interior installation pocket block 8 of underwrite lining work castable 5, ventilating seat brick 9.
Be followed successively by underwrite lining work castable 5, bag wall working lining castable 4, slag line bottom monocycle magnesia carbon brick 3 from bottom to top on bag material for permanent liner in pouring 12 tops, the end, the length a of slag line outer shroud magnesia carbon brick 1 is 50mm, and in slag line, the length b of ring magnesia carbon brick 2 is 170mm.The thickness c of bag wall working lining castable 4 is 200mm, and the thickness m of underwrite lining work castable 5 is 400mm.Build by laying bricks or stones after 2 layers of slag line bottom monocycle magnesia carbon brick 3, slag line magnesia carbon brick is divided into 2 liang of rings of ring magnesia carbon brick in slag line outer shroud magnesia carbon brick 1 and slag line builds by laying bricks or stones, then builds successively at an upper portion thereof 2 layers of monocycle bag mouth brick 7, pouring ladle from bottom to top by laying bricks or stones along castable 6.Described monocycle bag mouth brick 7 is close to ladle involucrum 10 inwalls and is built by laying bricks or stones, has the overall performance that improves ladle liner.
It is MT-14A that slag line outer shroud magnesia carbon brick 1, slag line interior ring magnesia carbon brick 2 and slag line bottom monocycle magnesia carbon brick 3 are selected the magnesia carbon brick trade mark.
Described monocycle bag mouth brick 7 aluminium magnesia carbon bricks, its MgO+Al
2o
3content is that 72～76%, MgO content is that 10～14%, C content is 7～8%, and apparent porosity is 8～10%, and bulk density is 2.80～2.90g/cm
3, cold crushing strength is 40～55MPa, 0.2MPa refractoriness under load is 1600～1670 ℃.
When ladle working lining light maintenance, do not remove ring magnesia carbon brick 2 in slag line, only change slag line outer shroud magnesia carbon brick 1.
The method of building by laying of ladle working lining slag lining, comprise light maintenance and in repair two kinds and build by laying method, step is as follows:
1) method of building by laying of ladle working lining light maintenance and slag lining thereof:
The new working lining of ladle is reached the standard grade and is used 40～50 heats, when slag line bottom monocycle magnesia carbon brick 3 corrodes the about 125mm of the residual thick 120～130mm(of being) time, implement ladle working lining light maintenance, minor repair method is to change pocket block 8, ventilating seat brick 9, monocycle bag mouth brick 7, pouring ladle is along castable 6, residual lining surface to bag wall working lining castable 4 and underwrite lining work castable 5 adopts corundum-spinel gunning refractory to carry out spray repair maintenance, it is characterized in that the method for building by laying of slag line magnesia carbon brick: retain with after slag line bottom monocycle magnesia carbon brick 3 and with after slag line in encircle magnesia carbon brick 2, only remove the slag line outer shroud magnesia carbon brick 1 after using, the slag line outer shroud magnesia carbon brick 1 more renewing,
2) in ladle working lining, repair and the method for building by laying of slag lining:
According to 1), ladle working lining light maintenance 3 times, in the time wrapping the residual thick about 95mm of erosion of wall working lining castable (4), implement to repair in ladle working lining, in the method for repairing be to change pocket block 8, ventilating seat brick 9, monocycle bag mouth brick 7, pouring ladle along castable 6, the residual lining of bag wall working lining castable 4 and underwrite lining work castable 5 is carried out to peeling cover according to prior art and water, it is characterized in that the method for building by laying of slag line magnesia carbon brick: change ring magnesia carbon brick 2 and slag line outer shroud magnesia carbon brick 1 in whole slag line bottom monocycle magnesia carbon bricks 3, slag line;
3) according to above-mentioned 1)～2) step, circulation is built by laying 9 times.
Circulation is built by laying after 9 times, the ladle permanent lining that should all more renew and working lining, comprise in ladle permanent lining heat insulation fireproof plate 11, material for permanent liner in pouring 12, bag wall working lining castable 4, underwrite lining work castable 5, slag line outer shroud magnesia carbon brick 1, slag line that ring magnesia carbon brick 2, slag line bottom monocycle magnesia carbon brick 3, monocycle bag mouth brick 7, bag are along castable 6.
Embodiment 2
Other are with embodiment 1, and difference is:
The length a of described slag line outer shroud magnesia carbon brick 1 is 80mm, and in slag line, the length b of ring magnesia carbon brick 2 is 120mm.
The thickness c of described bag wall working lining castable 4 is 180mm, and the thickness m of underwrite lining work castable 5 is 350mm.
The method of building by laying of ladle working lining slag lining, comprise light maintenance and in repair two kinds and build by laying method, step is as follows:
1) method of building by laying of ladle working lining light maintenance and slag lining thereof:
The new working lining of ladle is reached the standard grade and is used 40～50 heats, when slag line bottom monocycle magnesia carbon brick 3 corrodes the about 115mm of the residual thick 110～120mm(of being) time, implement ladle working lining light maintenance, minor repair method is to change pocket block 8, ventilating seat brick 9, monocycle bag mouth brick 7, pouring ladle is along castable 6, residual lining surface to bag wall working lining castable 4 and underwrite lining work castable 5 adopts corundum-spinel gunning refractory to carry out spray repair maintenance, it is characterized in that the method for building by laying of slag line magnesia carbon brick: retain with after slag line bottom monocycle magnesia carbon brick 3 and with after slag line in encircle magnesia carbon brick 2, only remove the slag line outer shroud magnesia carbon brick 1 after using, the slag line outer shroud magnesia carbon brick more renewing,
2) in ladle working lining, repair and the method for building by laying of slag lining:
According to 1), ladle working lining light maintenance 3 times, in the time wrapping the residual thick about 90mm of erosion of wall working lining castable 4, implement to repair in ladle working lining, in the method for repairing be to change pocket block 8, ventilating seat brick 9, monocycle bag mouth brick 7, pouring ladle along castable 6, the residual lining of bag wall working lining castable 4 and underwrite lining work castable 5 is carried out to peeling cover according to prior art and water, it is characterized in that the method for building by laying of slag line magnesia carbon brick: change ring magnesia carbon brick 2 and slag line outer shroud magnesia carbon brick 1 in whole slag line bottom monocycle magnesia carbon bricks 3, slag line;
3) according to above-mentioned 1)～2) step, circulation is built by laying 7 times.
Circulation is built by laying after 7 times, the ladle permanent lining that should all more renew and working lining, comprise in ladle permanent lining heat insulation fireproof plate 11, material for permanent liner in pouring 12, bag wall working lining castable 4, underwrite lining work castable 5, slag line outer shroud magnesia carbon brick 1, slag line that ring magnesia carbon brick 2, slag line bottom monocycle magnesia carbon brick 3, monocycle bag mouth brick 7, bag are along castable 6.
Claims (7)
1. a ladle working lining, comprise that ring magnesia carbon brick (2), slag line bottom monocycle magnesia carbon brick (3) in slag line outer shroud magnesia carbon brick (1), slag line, bag wall working lining castable (4), underwrite lining work castable (5), bag are along castable (6), monocycle bag mouth brick (7), it is characterized in that, ladle involucrum (10) inwall is laid permanent liner heat insulation fireproof plate (11), material for permanent liner in pouring (12) successively, and pocket block (8), ventilating seat brick (9) are installed in underwrite lining work castable (5); Be followed successively by underwrite lining work castable (5), bag wall working lining castable (4), slag line bottom monocycle magnesia carbon brick (3) from bottom to top on material for permanent liner in pouring (12) top at the bag end; Slag line bottom monocycle magnesia carbon brick (3) is 2～3 layers, on slag line bottom monocycle magnesia carbon brick (3), build slag line magnesia carbon brick by laying bricks or stones, slag line magnesia carbon brick is divided into ring magnesia carbon brick (2) two rings in slag line outer shroud magnesia carbon brick (1) and slag line builds by laying bricks or stones, and its top is built 1～2 layer of monocycle bag mouth brick (7), pouring ladle from bottom to top by laying bricks or stones successively along castable (6).
2. ladle working lining as claimed in claim 1, it is characterized in that, described monocycle bag mouth brick (7), be close to ladle involucrum (10) inwall and build by laying bricks or stones, between monocycle bag mouth brick (7) and ladle involucrum (10) without permanent liner heat insulation fireproof plate (11) and material for permanent liner in pouring (12).
3. ladle working lining as claimed in claim 1 or 2, is characterized in that, the length a of described slag line outer shroud magnesia carbon brick (1) is 48～82mm, and in slag line, the length b of ring magnesia carbon brick (2) is 118～172mm.
4. ladle working lining as claimed in claim 1 or 2, is characterized in that, the thickness c of described bag wall working lining castable (4) is 178～200mm, and the thickness m of underwrite lining work castable (5) is 348～400mm.
5. ladle working lining as claimed in claim 1 or 2, is characterized in that, it is MT-14A that described slag line outer shroud magnesia carbon brick (1), slag line interior ring magnesia carbon brick (2) and slag line bottom monocycle magnesia carbon brick (3) are selected the magnesia carbon brick trade mark.
6. ladle working lining as claimed in claim 3, is characterized in that, it is MT-14A that described slag line outer shroud magnesia carbon brick (1), slag line interior ring magnesia carbon brick (2) and slag line bottom monocycle magnesia carbon brick (3) are selected the magnesia carbon brick trade mark.
7. ladle working lining as claimed in claim 4, is characterized in that, it is MT-14A that described slag line outer shroud magnesia carbon brick (1), slag line interior ring magnesia carbon brick (2) and slag line bottom monocycle magnesia carbon brick (3) are selected the magnesia carbon brick trade mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420017158.5U CN203695941U (en) | 2014-01-11 | 2014-01-11 | Steel ladle working lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420017158.5U CN203695941U (en) | 2014-01-11 | 2014-01-11 | Steel ladle working lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203695941U true CN203695941U (en) | 2014-07-09 |
Family
ID=51046440
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420017158.5U Expired - Fee Related CN203695941U (en) | 2014-01-11 | 2014-01-11 | Steel ladle working lining |
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| Country | Link |
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| CN (1) | CN203695941U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736984A (en) * | 2014-01-11 | 2014-04-23 | 莱芜钢铁集团有限公司 | Hot-metal bottle slag stopper with hot metal flowing port and manufacturing method thereof |
| CN103736985A (en) * | 2014-01-11 | 2014-04-23 | 莱芜钢铁集团有限公司 | Steel ladle working lining and method for building slag line part of steel ladle working lining |
-
2014
- 2014-01-11 CN CN201420017158.5U patent/CN203695941U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736984A (en) * | 2014-01-11 | 2014-04-23 | 莱芜钢铁集团有限公司 | Hot-metal bottle slag stopper with hot metal flowing port and manufacturing method thereof |
| CN103736985A (en) * | 2014-01-11 | 2014-04-23 | 莱芜钢铁集团有限公司 | Steel ladle working lining and method for building slag line part of steel ladle working lining |
| CN103736985B (en) * | 2014-01-11 | 2016-06-08 | 莱芜钢铁集团有限公司 | A kind of ladle working lining and slag lining thereof build by laying method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20170111 |
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| CF01 | Termination of patent right due to non-payment of annual fee |