CN2828055Y - Energy-saving long-acting tuyere small cover - Google Patents
Energy-saving long-acting tuyere small cover Download PDFInfo
- Publication number
- CN2828055Y CN2828055Y CN 200520052074 CN200520052074U CN2828055Y CN 2828055 Y CN2828055 Y CN 2828055Y CN 200520052074 CN200520052074 CN 200520052074 CN 200520052074 U CN200520052074 U CN 200520052074U CN 2828055 Y CN2828055 Y CN 2828055Y
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- China
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- small cover
- tuyere small
- tuyene
- small sleeve
- tuyere
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Abstract
The utility model discloses an energy-saving long-acting tuyere small cover, which applies to an air supply system of a metallurgy blast furnace. A wear resistant and high temperature resistant refractory lining 3 is sheathed in the inner wall surface contacted by a tuyere small cover 1 and hot air. The heat of cooling water which is conducted to the tuyere small cover 1 is reduced when the hot air passes through the tuyere small cover 1. Thus, the temperature of the hot air and the heat loss can be reduced. The outer wall on the front end of the tuyere small cover 1 is provided with ribs 6 and 6'. A refractory heat insulation layer 4 is coated between the ribs 6 and 6'. The refractory heat insulation layer 4 can prevent the copper wall of the tuyene small cover 1 from corrosion when liquid zinc, lead or iron drops above the tuyene. The tuyene small cover can be used for metallurgy blast furnaces. Cooling water which enters an inner cavity of the tuyene small cover 1 from a water inlet 2' and comes out from a water outlet 2 so as to cool the tuyene small cover 1 is turned on. Thus, the tuyene small cover 1 can not be burnt. The tuyene small cover with the structural shape can apply to metallurgy blast furnaces with various nominal capacities.
Description
Technical field
The utility model relates to a kind of energy-conservation long-acting tuyere small sleeve of using the metallurgy high furnace supply air system, belongs to the C21B7/16 class.
Background technology
At present China's blast furnace air temperature level is generally not high, and along with the further increase of blast furnace air quantity and combustion intensity, the wind-warm syndrome level is reduction further.And the raising of pulverized coal injection amount is in requisition for higher wind-warm syndrome level.The heat capacity of raising hotblast stove is one of method that adopts usually at present to improve hot blast temperature, and many iron and steel enterprises do not notice that taking measures to reduce the unnecessary loss that has hot blast temperature now also is an important ring.Shoudu Iron and Steel Co once carried out test, reached 135 ℃ by the hot blast endless tube unexpectedly to the loss of the wind-warm syndrome of cupola well, and it accounts for wind-warm syndrome and (sees that Luo Jiao edits " iron-making theory " P458 metallurgical industry press 1994.6) 12% or more.
Therefore tuyere small sleeve enters last passage and the strongest position of the highest cooling of blast furnace heat flow rate per unit area in the stove as blast-furnace hot-air, and taking measures to reduce the thermosteresis of taking away in the air port also is one of important means that improves the effective wind-warm syndrome of blast furnace.
With domestic 2000m
3The level blast furnace is an example, and the tuyere small sleeve Inlet and outlet water temperature difference is generally about 5 ℃, and the cooling heat loss of tuyere small sleeve reaches 20 * 10 usually
9J/h accounts for more than 18% of whole blast furnace cooling heat loss.And domestic numerous 300-500m
3The blast furnace of level, the air port water coolant Inlet and outlet water temperature difference reaches more than 8 ℃ usually even reaches 13 ℃, and each air port cooling water flow is 30-40m
3/ h, the heat by tuyere small sleeve loss is 12 * 10
9More than the J/h.
In addition along with the development of blast furnace to high injecting coal quantity direction, blast-furnace tuyere is increasing by the quantity that coal dust weares and teares, the air port of wearing and tearing because of coal powder injection in many iron and steel enterprises progressively substitutes the high temperature scaling loss, become the principal mode that the air port is damaged, this also is the ability that an urgent demand blast-furnace tuyere improves the wearing and tearing of opposing coal dust.
Summary of the invention
The purpose of this utility model is to provide a kind of can be reduced the air port cooling heat loss, improves the air port antiwear property and improve the air port energy-conservation long-acting tuyere small sleeve in work-ing life.
For achieving the above object, the technical solution adopted in the utility model is: utilize existing copper blast furnace tuyere small sleeve, reinforce the fireproof casing of one deck Wear-resistant, high-temperature resistant at the inwall of tuyere small sleeve contact hot blast, the material of this fireproof casing is silicon carbide, pyroceramic or high temperature resistant mould material.Design has the step that a height equates with the fireproof casing wall thickness before the little cover of air port inwall.Outer wall at the tuyere small sleeve front end designs bossed rib, has applied refractory protection between two ribs, and the material of this refractory protection adopts the fire-resistant pouring material of silicon carbide-containing, corundum, refractory fibre etc.
Adopt energy-conservation long-acting tuyere small sleeve that as above technical scheme provided compared with prior art, its beneficial effect is:
1. energy-saving effect is remarkable.Adopt the blast furnace of this energy-conservation long-acting tuyere small sleeve to compare, as 2000m with the blast furnace that adopts fine copper matter tuyere small sleeve
3The cooling range of the blast furnace tuyere small sleeve of level can reduce 1.5-2 ℃ usually, with each air port 35m
3/ h calculates, and the thermosteresis by tuyere small sleeve can reduce by 6 * 10 on existing basis
9More than the J/h, be equivalent to improve the hot blast significant temp more than 15 ℃.Coke thermal value 33400J/g by common per hour can save 0.18 ton in coke, by 1300 yuan in coke per ton, and a 2000m
3The coke cost that the blast furnace of level just can be created up to more than 200 ten thousand yuan in 1 year reduces volume.And domestic numerous 300-500m
3The blast furnace of level, because its air port water coolant Inlet and outlet water temperature difference is higher, reach usually more than 8 ℃, sometimes even reach 13 ℃, as adopting benefit energy-conservation behind the energy-conservation long-acting tuyere small sleeve of this kind then more remarkable, the energy-saving benefit that blast furnace was created in a year can reach more than 1,000,000 yuan.
2. the air port prolongs work-ing life.The energy-conservation tuyere small sleeve of this kind structural shape has stronger resistivity to coal dust wearing and tearing and top scaling loss, can reach the work-ing life of this tuyere small sleeve to reach to more than 1 year half a year.The tuyere small sleeve that adopts this kind pattern is than adopting traditional copper tuyere small sleeve, and can prolong 50-100% its work-ing life.Adopt air port number that the blast furnace 1 year of traditional tuyere small sleeve damages usually more than 50, large blast furnace is changed one and is damaged 2 hours damping down time that the air port needs nearly, and the value of a tuyere small sleeve adopts tuyere small sleeve described in the utility model about 15000 yuan, to one as 2000m
3Large blast furnace can reduce the consumption costs of tuyere small sleeve in 1 year more than 200,000 yuan.
3. improve furnace processor.Because tuyere small sleeve damages the minimizing of quantity, the blast furnace staying time decreased estimates that a large blast furnace can reduce the damping down time in 1 year more than 30 hours, can the voluminous pig iron more than 7000 tons, and the yield increase effect that brings thus is more than 700,000 yuan.
4. improve the pulverized coal injection amount.Because this kind tuyere small sleeve greatly reduces the cooling heat loss in air port itself, improved effective hot blast temperature of blast furnace, can improve the preceding theoretical combustion temperature of blast-furnace tuyere effectively and the ejection coal dust is carried out preheating, help the burning of coal dust.Adopt the energy-conservation long-acting tuyere small sleeve of this kind, the air port is reduced greatly by the possibility that coal dust weares and teares, and the inlet number that allows to coal powder injection is increased, and the homogeneity of pulverized coal injection greatly improves.These all are that good condition has been created in the raising of pulverized coal injection amount.
Description of drawings
Fig. 1 is the structure cross-sectional schematic of energy-conservation long-acting tuyere small sleeve described in the utility model, also is specification digest accompanying drawing of the present utility model.
Fig. 2 is that the left side of Fig. 1 is to synoptic diagram.
Fig. 3 is the A-A diagrammatic cross-section of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
As shown in drawings, utilize existing copper tuyere small sleeve 1, be with Wear-resistant, high-temperature resistant on tuyere small sleeve 1 and inner wall surface that hot blast contacts, have certain thickness fireproof casing 3, the material of fireproof casing 3 can be selected from amorphous refractories such as silication silicon or pyroceramic, also can be selected from unshape refractories such as high temperature resistant mould material.The gauge control of fireproof casing 3 is between 5～20 millimeters.When the material of fireproof casing 3 is selected amorphous refractory for use, just need between the inwall of fireproof casing 3 and copper tuyere small sleeve 1 to adopt carbon paste or refractory mortar fully to clog.Because the capacity of heat transmission of the refractory materials that adopts is lower than the capacity of heat transmission of copper tuyere small sleeve 1, the surface of employed fireproof casing 3 has occupied the major part of whole tuyere small sleeve 1 heating surface area simultaneously, this heat that just makes 800～1250 ℃ hot blast be transmitted to tuyere small sleeve 1 internal cooling water by tuyere small sleeve 1 time greatly reduces, thereby greatly reduces temperature and the calorific loss of blast-furnace hot-air by tuyere small sleeve 1 time.
Be to guarantee the installation and the use of fireproof casing 3, the step 5 in that the Front-end Design of tuyere small sleeve 1 has a height to equate with the thickness of fireproof casing 3 is not covered the hot-air channel of the inside of tuyere small sleeve 1 by fireproof casing 3.The front end of the tuyere small sleeve 1 in the distance State of Blast Furnace has still kept copper inwall with the strongest position that is heated; just the copper inwall at this position is thickeied to some extent; fireproof casing 3 is unlikely is like this damaged by too high temperature and thermal shock; also avoid in the installation process destruction to fireproof casing 3; both play 3 effects of protection fireproof casing, also played the effect of stable blast furnace blowing system.On the outer wall of tuyere small sleeve 1 front end, designed outstanding rib 6 or 6 ', rib 6,6 ' between be coated with refractory insulating layer 4.Described refractory insulating layer 4 adopts the mould material of materials such as silicon carbide-containing, corundum, refractory fibre ice glass, and its proportioning can be 1: 1: 1, and the cast thickness of refractory insulating layer 4 is between 3～30 millimeters.Copper wall to tuyere small sleeve 1 when refractory insulating layer 4 can prevent that liquid zinc, lead, iron are dropped in the top, air port causes corrode, thereby avoids the scaling loss of common tuyere small sleeve 1 top copper wall, can prolong the work-ing life of tuyere small sleeve 1 effectively.
During enforcement, according to accompanying drawing described, with fireproof casing 3 adjacent step 5 suits, with refractory insulating layer 4 be coated on rib 6,6 ' between.The energy-conservation long-acting tuyere small sleeve of making is assembled in the air port and can comes into operation on the cover 7, promptly the front end of tuyere small sleeve 1 is stretched in the State of Blast Furnace.Open the related valve on the water-in 2, allow water coolant enter the inner chamber of tuyere small sleeve 1, again from water outlet 2 ' come out tuyere small sleeve 1 is cooled off from water-in 2.Can reach 0.5～1.0 year the work-ing life of this tuyere small sleeve.
Claims (1)
1, a kind of energy-conservation long-acting tuyere small sleeve, it is characterized in that: be with fireproof casing (3) on the inner wall surface of tuyere small sleeve (1), outer wall at tuyere small sleeve (1) front end has rib (6,6 '), and rib is coated with refractory insulating layer (4) between (6,6 ').
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520052074 CN2828055Y (en) | 2005-10-08 | 2005-10-08 | Energy-saving long-acting tuyere small cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520052074 CN2828055Y (en) | 2005-10-08 | 2005-10-08 | Energy-saving long-acting tuyere small cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2828055Y true CN2828055Y (en) | 2006-10-18 |
Family
ID=37079613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520052074 Expired - Fee Related CN2828055Y (en) | 2005-10-08 | 2005-10-08 | Energy-saving long-acting tuyere small cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2828055Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110628975A (en) * | 2019-09-11 | 2019-12-31 | 大冶特殊钢有限公司 | Tuyere ceramic sleeve for blast furnace ironmaking |
| CN116334331A (en) * | 2023-03-31 | 2023-06-27 | 湖南德尚源耐磨工业有限公司 | A blast furnace tuyere device and its small tuyere cover, tuyere middle cover and energy-saving method |
-
2005
- 2005-10-08 CN CN 200520052074 patent/CN2828055Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110628975A (en) * | 2019-09-11 | 2019-12-31 | 大冶特殊钢有限公司 | Tuyere ceramic sleeve for blast furnace ironmaking |
| CN116334331A (en) * | 2023-03-31 | 2023-06-27 | 湖南德尚源耐磨工业有限公司 | A blast furnace tuyere device and its small tuyere cover, tuyere middle cover and energy-saving method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |