CN201485477U - Liner structure for crucible and hearth of blast furnace - Google Patents
Liner structure for crucible and hearth of blast furnace Download PDFInfo
- Publication number
- CN201485477U CN201485477U CN2009202223827U CN200920222382U CN201485477U CN 201485477 U CN201485477 U CN 201485477U CN 2009202223827 U CN2009202223827 U CN 2009202223827U CN 200920222382 U CN200920222382 U CN 200920222382U CN 201485477 U CN201485477 U CN 201485477U
- Authority
- CN
- China
- Prior art keywords
- brick
- thickness
- cupola well
- carbon brick
- blast furnace
- 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.)
- Expired - Lifetime
Links
Landscapes
- Blast Furnaces (AREA)
Abstract
The utility model relates to a liner structure for the crucible and the hearth of a blast furnace, which belongs to the technical field of blast furnace equipment and is suitable for liners of crucibles and hearths of large and medium-sized blast furnaces. The liner structure is formed by laying graphite carbon blocks, high-conductivity carbon blocks, ultramarinepore carbon blocks, corundum-mullite ceramic cushions and high-conductivity crucible carbon blocks. The liner structure is characterized in that the graphite carbon blocks (2) are laid on the hearth, the high-conductivity carbon blocks (3) are laid on the graphite carbon blocks (2), the ultramarinepore carbon blocks (4) are then laid, the corundum-mullite ceramic cushions (5) are laid in the central area at the top, and high-conductivity crucible carbon blocks (7) and tuyere combined bricks (8) are laid on the periphery of the crucible. The liner structure has the advantages that the combined liner for the crucible and the hearth integrates long campaign life technologies of thermal solution method and refractory material method into a whole, the requirement on long campaign life of the blast furnace can be met, the campaign life is expected to be more than 20 years, therefore, the liner structure has high promotion and application values.
Description
Technical field
The utility model belongs to the blast-furnace equipment technical field, particularly relates to a kind of Bottom Lining Structure of Blast Furnace, relates in particular to a kind of " pyrolysis determine method " blast furnace hearth inner lining structure of strengthening cooling technology, is specially adapted to the cupola well bottom lining of big-and-middle-sized blast furnace.
Background technology
The breakage of cupola well has during the nearly last ten years become the basic reason of blowing out, at present for prolonging the blast furnace hearth and bottom life-span two kinds of solutions is arranged: " pyrolysis determine method " and " refractory materials method ".The know-why and the measure of these two kinds of technical systems are not quite similar, but the two all is the feasible measure that prolongs the blast furnace hearth and bottom life-span.
1, " pyrolysis determine method " scheme is characterized in: adopt the highly-conductive hot carbon brick in cupola well " head of garlic shape " abnormal erosion district, and by the cooling effect of cooling stave, push 1150 ℃ of thermoisopleths (molten steel solidification line) to the cupola well center as far as possible, and can form one deck protectiveness " slag crust " or " iron-clad " at the carbon brick hot side, make carbon brick avoid molten iron infiltration, wash away with alkali-metal chemical erosion and thermal stress damage to prolong its work-ing life; Supporting use highly-conductive hot carbon brick or composite burner bottom structure at the bottom of the State of Blast Furnace.
2, " refractory materials method " scheme is that the characteristics of ceramic cup cupola well bottom lining structure are: adopt the micropore carbon block to build by laying bricks or stones in the blast furnace hearth and bottom zone, cupola well wall circular carbon brick inboard is built large-scale brown corundum prefabricated section by laying bricks or stones, build 2～3 layers of mullite brick above the furnace bottom carbon brick by laying bricks or stones, in this zone, form the pottery liner of a cup-shaped, i.e. so-called " ceramic cup ".The principal feature of ceramic cup is to utilize the ceramic material of low heat conduction, and 1150 ℃ of thermoisopleths are arrested in the ceramic layer, makes carbon brick avoid 800～1100 ℃ of brittle rupture temperature ranges.Utilize the high-performance quality raising blast furnace work-ing life of ceramic layer.
The most dangerous zone of blast furnace hearth is cupola well and furnace bottom intersection, erosions such as this zone is washed away equally, chemical erosion, molten iron infiltration corrode, thermal stresses, its weakness is to be subjected to the most complicated maximum thermal stresses effect (being come from the radial stress that the cupola well furnace bottom is vertical up and down and furnace hearth material expands and forms simultaneously) than other zone, its erosion shows as usually said " head of garlic shape " and corrodes, cause dangerous cupola well excessive erosion easily, threaten the safety in production of blast furnace.
For modern big-and-middle-sized blast furnace, its life-span should reach more than 20 years, and the long-lived technology of blast furnace is more prone to adopt " pyrolysis determine method ".Along with furnace volume increases, combustion intensity improves and the increase of injecting coal quantity, new variation has appearred in the cupola well problem, because one's will dies within one Jiao Dui enlarges in the cupola well, molten iron circulation strengthens, the molten iron that the cupola well sidewall suffers washes away, erosion, high temperature and thermal stress damage be all in aggravation, hearth erosion is easy to corrode development to " resembling the pin shape ", has brought great hidden danger for blast furnace longevity.Therefore how choose reasonable cupola well carbon brick, furnace bottom are joined the key problem in technology that brick technology and supporting cooling technology become blast furnace longevity.
Summary of the invention
The purpose of this utility model is to provide a kind of Bottom Lining Structure of Blast Furnace, new variation requirement and refractory materials latest technology in conjunction with big-and-middle-sized blast furnace hearth problem appearance, thereby design and a kind ofly more can satisfy the blast furnace production requirement, its life-span meets or exceeds the cupola well bottom lining structure in 20 years.
The utility model is formed by graphite carbon block, high heat conduction carbon block, ultramicropore carbon block, corundum-mullite ceramics pad and brick the building of NMA+NMD; It is characterized in that, furnace bottom is completely spread the graphite carbon block, completely spreads high heat conduction carbon block at an upper portion thereof, completely spreads the ultramicropore carbon block again, the topmost central zone is built the corundum-mullite ceramics pad by laying bricks or stones, and the cupola well neighboring area is built high heat conduction cupola well carbon brick (NMA+NMD brick) by laying bricks or stones to the air port modular tile.
Furnace bottom layers of material thickness range is 2 layers on corundum-mullite ceramics pad from top to bottom, total thickness 800-1000mm; Ultramicropore carbon brick layer 2-3 total thickness 800-1200mm, 1 layer of highly-conductive hot carbon brick, thickness 400-600mm, 1 layer of graphite brick, thickness 400-600mm; The furnace bottom total thickness is 2400-3400mm; The cupola well sidewall thickness is 800-1300mm.
Corundum-mullite thickness is 400mm, 450mm or 500mm; Ultramicropore carbon brick, highly-conductive hot carbon brick and graphite brick thickness are 400mm, 450mm, 500mm, 550mm or 600mm; The cupola well sidewall thickness is 800.1mm, 914.4mm, 1028.7mm, 1143mm or 1257.3mm.
Adopt high heat conduction cupola well carbon brick, the composite burner bottom structure of novel carbon refractories+corundum-mullite ceramics pad has been strengthened the cooling of cupola well furnace bottom simultaneously, gives full play to the effect of high heat conduction high-quality carbon brick.When blast furnace is selected cupola well furnace bottom baker and blow-on protecting materials simultaneously, suitably strengthened the material property in " head of garlic shape " zone, used Al in blast furnace " head of garlic shape " zone
2O
3Content is greater than 65% ordinary blast high alumina brick, and Al is used in other zone of blast furnace
2O
3Content is greater than 42% ordinary blast clay brick.Adopt the soft water cooling at the bottom of the State of Blast Furnace, second and third section of cupola well cooling stave " head of garlic shape " abnormal erosion zone adopts the cooling of soft water sealing and circulating to add the supporting cooling technology of copper cooling wall.
Advantage of the present utility model is, this cupola well furnace bottom combined inner lining will " pyrolysis determine method " and " refractory materials method " long-lived technology combine together, can satisfy the requirement of blast furnace longevity, estimate that its life-span can reach more than 20 years, have higher popularization and application values.
Description of drawings
Fig. 1 is a kind of cupola well bottom lining structural representation of the present utility model.Wherein, the furnace bottom charcoal is smash material 1, graphite brick fuel 2, high heat conduction brick fuel 3, ultramicropore brick fuel 4, corundum-mullite ceramics pad 5, high alumina brick 6, high heat conduction cupola well carbon brick 7, air port modular tile 8, clay protection tile 9
Embodiment
Fig. 1 is a kind of embodiment of the present utility model.
Because corundum-mullite itself has reasonable strength property, take further to improve strength property and improve that anti-molten iron corrodes and the potentiality of molten iron performance of flushing are limited, therefore the corundum-mullite performance optimization should improve the resistance to overturning of material, the emphasis optimization design material reheating linear change rate on reheating index be 0-0.1% (1500 ℃ * 3hr), inner lining structure keeps microdilatancy in use at the bottom of making State of Blast Furnace, improves the bottom construction performance.After furnace bottom corundum-mullite ceramics pad 5 was determined, furnace bottom water cooling tube to the furnace bottom carbon between the ceramic blanket was smash material 1 and is selected and mate just to seem more crucial.
Blast furnace ultramicropore carbon brick 4 is blast furnace high-quality refractory materials newly developed in recent years, there are better thermal conductivity, microporosity and anti-hot metal erosion energy good than micropore carbon brick, ultramicropore carbon brick 4 thermal conductivitys 〉=20w/ (m.k), be more suitable for position, State of Blast Furnace bottom and ceramic blanket over-matching, therefore preferably use ultramicropore carbon brick 7 in the ceramic blanket bottom.In order to satisfy the requirement of furnace bottom heat transfer structure system, this example is novel to have adopted high heat conduction carbon block 3 below the ultramicropore carbon brick, and the highly-conductive hot carbon brick has higher thermal conductivity, highly-conductive hot carbon brick thermal conductivity 〉=30w/ (m.k), and heat-conductive characteristic is good; Also adopting graphite carbon block 2 near the furnace bottom water cooling tube at last, the hot coefficient 〉=60w/ of graphite brick (m.k), heat conductivility is better.
The thickness of furnace bottom is generally 2400-3500mm, after the furnace hearth material material is determined, the thickness of layers of material also can produce material impact to the distribution of bottom temperature field, under the condition of comprehensive cupola well ladle heel layer thickness requirement, the long-lived technical requirements of blast furnace, refractory materials processing technology and blast furnace engineering operating technique, determine that furnace bottom layers of material thickness is 2 layers on corundum-mullite ceramics pad (thickness 500mm+500mm) from top to bottom; 2 layers of ultramicropore carbon bricks (thickness 600mm+600mm); 1 layer of highly-conductive hot carbon brick (thickness 600mm); 1 layer of (thickness 400mm) furnace bottom total thickness of graphite brick 3200mm.Innovation optimization by above bottom construction and perfect has had " at the bottom of the composite burner " and " full carbon furnace bottom " performance advantage concurrently at the bottom of making State of Blast Furnace.
The blast furnace hearth sidewall uses NMA and NMD brick 8, belongs to the carbonaceous cupola well pyrolysis long-lived technology of blast furnace of determining, and the thermal conductivity of NMA and NMD and intensity have certain difference, so it is very important to join the brick technology.NMD hot wafering carbon brick has higher thermal conductivity and relative lower slightly intensity, is complementary but can strengthen cooling with second and third section of blast furnace copper cooling wall and soft water sealing and circulating better, helps forming iron layer protection with fixed attention at the cupola well sidewall.Adopted different NMA and NMD combination to join brick structure and thickness according to service requirements.
The utility model is built by laying bricks or stones by graphite carbon block 2, high heat conduction carbon block 3, ultramicropore carbon block 4, corundum-mullite ceramics pad 5 and GRAFTech company hot pressing carbon brick 7 etc. and is formed; It is characterized in that the furnace bottom charcoal smashes material and completely spread graphite carbon block 2 on 1, completely spread high heat conduction carbon block 3 at an upper portion thereof, completely spread ultramicropore carbon block 4 again, the topmost central zone is built corundum-mullite ceramics pad 5 by laying bricks or stones, and the cupola well neighboring area is built NMA+NMD brick 7 by laying bricks or stones to air port modular tile 8.
Furnace bottom layers of material thickness range is corundum-mullite ceramics pad 2 layer thickness scope 800-1000mm from top to bottom; Ultramicropore carbon brick 2～3 layer thickness scope 800-1200mm, highly-conductive hot carbon brick 1 layer thickness scope 400-600mm, graphite brick 1 layer thickness scope 400-600mm.The furnace bottom total thickness is 2400-3400mm; Cupola well sidewall thickness scope is 800-1300mm.
Corundum-mullite ceramics pad 5 typical thickness 400mm, 450mm or 500mm; Ultramicropore carbon brick 4, highly-conductive hot carbon brick 3 and graphite brick 2 typical thickness are 400mm, 450mm, 500mm, 550mm or 600mm; NMA+NMD brick 7 typical thickness are 800.1mm, 914.4mm, 1028.7mm, 1143mm or 1257.3mm.
The utility model key position selects for use the high-quality carbon brick to need to strengthen cooling exactly, so save rather than restriction the regulating power that takes into full account on cooling water inflow.
The utility model combines " heat conduction method " and " refractory material method " cupola well bottom lining design system together, has lot of advantages:
1, cupola well furnace bottom highly-conductive hot carbon brick-ceramic blanket combined inner lining structure has been concentrated the advantage of " heat conduction method " and " refractory material method " system, and cupola well zone emphasis has optimized NMA and brick structure and thickness are joined in the NMD combination; The furnace bottom emphasis has solved according to material property and instructions for use with the brick problem and according to the reasonable cloth brick of thermal conductivity factor gradient problem.
2, mobile the washing away that alleviates molten iron must have rational ladle heel layer depth, the ladle heel layer depth of design is 22% of cupola well diameter, the ladle heel layer depth is reasonable, and the flow direction of molten iron in cupola well changed to some extent, thereby can reduce molten iron to the mechanical erosion of furnace bottom and cupola well wall.
3, for " pyrolysis determine method " coupling, adopted the soft water closed circulating cooling, second and third section of blast furnace adopts copper cooling wall, relies on effective cooling effect, makes its hot side generate slag crust or the iron-clad of protectiveness, prolongs the life of the blast furnace to greatest extent.
4, only introduce the domestic NMA that still can not produce and NMD brick at the cupola well critical component; Furnace bottom area then adopts domestic graphite carbon block, high heat conduction carbon block, ultramicropore carbon block and corundum-mullite brick, saves foreign exchange investment and expense.
Claims (4)
1. blast furnace hearth and bottom liner unitized construction is built by laying bricks or stones by graphite carbon block, high heat conduction carbon block, ultramicropore carbon block, corundum-mullite ceramics pad and high heat conduction cupola well carbon brick and to be formed; It is characterized in that, furnace bottom shop graphite carbon brick (2) is spread highly-conductive hot carbon brick (3) at an upper portion thereof, repaves ultramicropore carbon brick (4), the topmost central zone is built corundum-mullite ceramics pad (5) by laying bricks or stones, and the cupola well neighboring area is built high heat conduction cupola well carbon brick (7) by laying bricks or stones to air port modular tile (8).
2. structure according to claim 1 is characterized in that, furnace bottom layers of material thickness range is 2 layers on corundum-mullite ceramics pad from top to bottom, total thickness 800-1000mm; Ultramicropore carbon brick layer 2-3 total thickness 800-1200mm, 1 layer of highly-conductive hot carbon brick, thickness 400-600mm, 1 layer of graphite brick, thickness 400-600mm; The furnace bottom total thickness is 2400-3400mm; The cupola well sidewall thickness is 800-1300mm.
3. structure according to claim 1 is characterized in that, corundum-mullite thickness is 400mm, 450mm or 500mm; Ultramicropore carbon brick, highly-conductive hot carbon brick and graphite brick thickness are 400mm, 450mm, 500mm, 550mm or 600mm; The cupola well sidewall thickness is 800.1mm, 914.4mm, 1028.7mm, 1143mm or 1257.3mm.
4. structure according to claim 1 is characterized in that, described high heat conduction cupola well carbon brick is the NMA+NMD brick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202223827U CN201485477U (en) | 2009-09-04 | 2009-09-04 | Liner structure for crucible and hearth of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202223827U CN201485477U (en) | 2009-09-04 | 2009-09-04 | Liner structure for crucible and hearth of blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201485477U true CN201485477U (en) | 2010-05-26 |
Family
ID=42424367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202223827U Expired - Lifetime CN201485477U (en) | 2009-09-04 | 2009-09-04 | Liner structure for crucible and hearth of blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201485477U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269522A (en) * | 2011-06-28 | 2011-12-07 | 南京钢铁股份有限公司 | Building process of furnace bottom of electric furnace |
| CN103261444A (en) * | 2010-12-17 | 2013-08-21 | 保尔伍斯股份有限公司 | Ceramic bottom lining of a blast furnace hearth |
| CN103305642A (en) * | 2013-05-22 | 2013-09-18 | 宣化钢铁集团有限责任公司 | Blast furnace cold-intensifying and heat-avoiding type gradient brick distribution method |
| CN111349732A (en) * | 2020-03-11 | 2020-06-30 | 广西柳州钢铁集团有限公司 | Blast furnace hearth structure differentiation processing method |
| CN114688878A (en) * | 2022-03-11 | 2022-07-01 | 中国铝业股份有限公司 | High-temperature-zone lining, graphitizing furnace lining and graphitizing furnace |
| CN115386669A (en) * | 2022-08-19 | 2022-11-25 | 山西太钢不锈钢股份有限公司 | Method for establishing triple-hearth structure of blast furnace |
-
2009
- 2009-09-04 CN CN2009202223827U patent/CN201485477U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103261444A (en) * | 2010-12-17 | 2013-08-21 | 保尔伍斯股份有限公司 | Ceramic bottom lining of a blast furnace hearth |
| CN103261444B (en) * | 2010-12-17 | 2015-10-07 | 保尔伍斯股份有限公司 | The ceramic end liner of blast furnace hearth |
| US9835331B2 (en) | 2010-12-17 | 2017-12-05 | Paul Wurth S.A. | Ceramic bottom lining of a blast furnace hearth |
| CN102269522A (en) * | 2011-06-28 | 2011-12-07 | 南京钢铁股份有限公司 | Building process of furnace bottom of electric furnace |
| CN102269522B (en) * | 2011-06-28 | 2013-04-24 | 南京钢铁股份有限公司 | Building process of furnace bottom of electric furnace |
| CN103305642A (en) * | 2013-05-22 | 2013-09-18 | 宣化钢铁集团有限责任公司 | Blast furnace cold-intensifying and heat-avoiding type gradient brick distribution method |
| CN111349732A (en) * | 2020-03-11 | 2020-06-30 | 广西柳州钢铁集团有限公司 | Blast furnace hearth structure differentiation processing method |
| CN114688878A (en) * | 2022-03-11 | 2022-07-01 | 中国铝业股份有限公司 | High-temperature-zone lining, graphitizing furnace lining and graphitizing furnace |
| CN115386669A (en) * | 2022-08-19 | 2022-11-25 | 山西太钢不锈钢股份有限公司 | Method for establishing triple-hearth structure of blast furnace |
| CN115386669B (en) * | 2022-08-19 | 2024-02-02 | 山西太钢不锈钢股份有限公司 | Method for establishing triple hearth structure of blast furnace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201485477U (en) | Liner structure for crucible and hearth of blast furnace | |
| CN2853801Y (en) | Basque structure of melting-reduction furnace for chromium iron smelting | |
| CN201212040Y (en) | Combined cooling stave | |
| CN201265017Y (en) | Blast furnace hearth furnace bottom lining structure | |
| CN211170721U (en) | Erosion guide type long-life blast furnace bottom hearth | |
| CN104858409A (en) | Steel ladle for steelmaking | |
| CN203700396U (en) | Chromium-iron alloy smelting blast furnace crucible | |
| CN205576184U (en) | Good blast furnace crucibe of heat conduction | |
| CN202329164U (en) | Lining structure of reducibility ore-smelting electric furnace | |
| CN112880409A (en) | Method for prolonging service life of refractory material at bottom of ferronickel electric furnace and bottom of ferronickel electric furnace | |
| CN203076574U (en) | Steel ladle pouring slag line underlayer | |
| CN109055639A (en) | High thermal conductivity Long-life blast furnace hearth and bricking building method | |
| CN201770713U (en) | Combined lining structure of furnace bottom and hearth of blast furnace | |
| CN204584250U (en) | A kind of ladle for making steel | |
| CN203559063U (en) | Blast furnace thin-wall lining | |
| CN211451852U (en) | Ferronickel electric furnace with magnesium-carbon composite furnace lining | |
| CN114850460A (en) | Steel ladle and preparation method thereof | |
| CN202954052U (en) | Novel blast-furnace crucible | |
| CN210367740U (en) | Refractory material lining structure | |
| CN203704662U (en) | Ferrochrome smelting furnace lining | |
| CN201501888U (en) | Graphite block embedded for large-scale blast furnace cooling wall | |
| CN110906740A (en) | Ferronickel electric furnace with magnesium-carbon composite furnace lining | |
| CN100362114C (en) | Blast furnace hearth | |
| CN210104000U (en) | Novel RH refining furnace lower part groove hearth structure | |
| CN2828055Y (en) | Energy-saving long-acting tuyere small cover |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: CAPITAL IRON + STEEL GENERAL CO. Effective date: 20140404 Owner name: BEIJING SHOUGANG CO., LTD. Free format text: FORMER OWNER: HEBEI SHOUGANG QIAN'AN STEEL CO., LTD. Effective date: 20140404 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 064404 TANGSHAN, HEBEI PROVINCE TO: 100041 SHIJINGSHAN, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140404 Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Beijing Shougang Co., Ltd. Address before: Yangzidian Town, Qian'an City, Hebei province 064404 Patentee before: Hebei Shougang Qian'an Steel Co., Ltd. Patentee before: Capital Iron & Steel General Company |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100526 |
|
| CX01 | Expiry of patent term |