CN87101904A - Caststeel cooling wall of weldable type - Google Patents
Caststeel cooling wall of weldable type Download PDFInfo
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- CN87101904A CN87101904A CN 87101904 CN87101904A CN87101904A CN 87101904 A CN87101904 A CN 87101904A CN 87101904 CN87101904 CN 87101904 CN 87101904 A CN87101904 A CN 87101904A CN 87101904 A CN87101904 A CN 87101904A
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Abstract
The invention discloses a kind of be used for blast furnace, caststeel cooling wall of weldable type.The cooling stave that the present invention relates to is made up of water inlet pipe and water outlet pipe, protective tube, standing bolt and the cooling stave body that comprises cooling water pipeline, and its principal feature is that the cooling stave body is welded by several parts such as huyashi-chuuka (cold chinese-style noodles), hot side and boss, and each several part is cast with soft steel.The cross section is that the orthogonal cooling water pipeline directly casts out on foundry goods.Water inlet pipe and water outlet pipe and protective tube thereof link to each other with cooling stave with engage thread, fixedly the cooling stave threaded stud.The cooling power and the work-ing life of this cooling stave are higher, can make to reach blast furnace campaign more than 10 years.
Description
A kind of caststeel cooling wall of weldable type that is used for blast furnace belongs to the cooling apparatus of blast furnace.
Cooling stave is the visual plant of blast furnace; it can make the heat in the furnace lining pass; and make slag on furnace lining, be condensed into one deck protectiveness slag crust at bottom house; protection furnace lining and even the work of replacement furnace lining; also can protect simultaneously the furnace shell of blast furnace, so cooling stave is significant for the life-span of blast furnace.After the seventies, the key link that influences blast furnace campaign is furnace bottom and cupola well, and cooling wall structure is also not outstanding to the influence of blast furnace campaign.Along with adopting the high thermal conductivity carbon brick to build by laying bricks or stones, measure such as strengthen at the bottom of the cool furnace, the life of bottom was extended to about 10 years, therefore, the principal element that influences blast furnace campaign goes to shaft by furnace bottom, cupola well.That is to say, the restoration of lower stack type of cooling and structure, refractory materials character, the mode of laying bricks and blast furnace operating factors influence blast furnace campaign.Here mean the generation stove labour of repairing during blast furnace is not the blast furnace campaign of indication.In recent years; the major cause that causes shutdown maintenance is the damage of the stack stave and the lining of shaft, if can further improve the life-span of stack stave, will protect the lining of shaft better; make it synchronous, can also improve the shaft life-span of blast furnace greatly with the life-span of furnace bottom.Its economic implications is very big.
Before the present invention, blast furnace cold but wall all adopts the cast iron materials integral cast to form.Before casting, earlier the weldless steel tube of certain diameter is curved the shape of requirement, be placed in the casting mold, form the cooling water pipeline of cooling stave.The cooling stave of this pattern is subjected to the restriction of structure, and the cooling performance in four bights lowers, and the bending radius of weldless steel tube is subjected to the restriction of caliber in addition, can not do very for a short time, and this also influences the raising of cooling power.On the other hand, because this body and function of cooling stave high-carbon cast iron materials, and cooling line adopts the steel seamless pipe of low-carbon (LC), when Low Carbon Steel Pipe contacts with molten iron, must cause the carburetting of steel pipe, steel pipe is become fragile, in case cooling stave generation crackle, then under the effect of thermal stresses, water-cooled tube can be broken, cause leakage accident.Thereby reduce the work-ing life of cooling stave.
The purpose of this invention is to provide a kind of good cooling results, the cooling stave of long service life.
In order to realize above-mentioned requirements, invented a kind of cast steel cooling wall of welded type.This cooling stave is the same with traditional cooling stave, is made up of water inlet pipe and water outlet pipe, protective tube, standing bolt and several parts such as cooling stave body of comprising cooling water pipeline.Its principal feature is that the cooling stave body is to be welded by several independent soft steel foundry goods such as huyashi-chuuka (cold chinese-style noodles), hot side or boss, and the pipeline of water coolant is at foundry goods certain position casting.
For a long time, cooling stave is all cylinder iron made, but its work-ing life is lower, and using as a servant order as the shaft of common grey iron or low-chromium cast-iron cooling stave is about 4-5 only.Afterwards the material of cooling stave was done some improvement, as adopting spheroidal graphite cast iron, the shaft labour order of ductile iron cooling stave can reach 7-10.But, require the order of cooling stave shaft labour above 10 years for reach synchronously the work-ing life that makes furnace bottom and shaft.For this reason, cooling stave of the present invention adopts the soft steel casting.The mechanical property of soft steel is better than cast iron, and this is well-known, but most importantly, soft steel has better thermal-shock resistance than cast iron.Different materials is done mechanical property and cold and hot fatigue test results is shown in the following table:
On blast furnace, did similarly test, as Wuhan Iron and Steel Plant 1 with soft steel
#The soft steel strutbeam water tank of the three sections water-cooleds in blast furnace stack middle and upper part, after the production in nine months (October in December, 1978 to nineteen eighty-three) was examined in addition in 4 years, water tank was still as excellent as before.Before this, employed cast iron flush cistern all has damage in various degree behind the use 2-3.Soft steel as cooling stave can be selected ZG15 for use, but in order to improve the high-temperature behavior of cooling stave, should fall doctor negative content, and the soft steel composition of recommending to adopt is: C, 0.12～0.22; Si, 0.15～0.30; Mn, 0.35～0.65; P≤0.04; S ,≤0.03.If but cooling stave cast by soft steel, the mode that just can not adopt weldless steel tube to be cast into of the piping system in the cooling stave then is because can not form the weldless steel tube thawing passage of water coolant when casting.In order to address this problem, cooling stave is divided into huyashi-chuuka (cold chinese-style noodles), hot side two portions.Then be divided into three parts such as huyashi-chuuka (cold chinese-style noodles), hot side and boss for the cooling stave that boss is arranged.These several parts cast out respectively, cast out cooling water pipeline at the corresponding position of these foundry goods.The cross section of pipeline is a rectangle, also can cast ellipse garden shape.Huyashi-chuuka (cold chinese-style noodles) and hot side (or projection section) are fitted together, make it into as a wholely with the method for welding, then made the integral body of cooling stave.Water inlet pipe and water outlet pipe is connected with this body and function of cooling stave engage thread.Cooling stave adopts threaded stud with being connected of furnace shell.
Below with reference to accompanying drawing invention is described further.
Fig. 1 is the longitudinal sectional drawing of a kind of concrete structure of the present invention
Fig. 2 is that the A-A of cooling stave shown in Figure 1 is to view
Fig. 3 is the longitudinal sectional drawing of cooling stave of a kind of generation boss.
With reference to Fig. 1, huyashi-chuuka (cold chinese-style noodles) of cooling stave (1) and hot side (2) are two independent foundry goods, are cast with the cooling water channel (3) of square-section on hot side (2).When huyashi-chuuka (cold chinese-style noodles) (1) and hot side (2) when being installed together, the part of water channel (3) projection contacts with the end face of huyashi-chuuka (cold chinese-style noodles) (1), promptly forms the passage of sealing.Go up the water-cooled tube import and export and the corresponding installation site of protective tube (5) machining internal thread will have externally threaded water inlet pipe and water outlet pipe (4) and protective tube (5) is screwed into huyashi-chuuka (cold chinese-style noodles) (1) at huyashi-chuuka (cold chinese-style noodles) (1); promptly finish being connected of water inlet pipe and water outlet pipe and protective tube thereof and cooling stave; in huyashi-chuuka (cold chinese-style noodles) (1) corresponding position boring; machining screw; threaded stud (6) is installed on the huyashi-chuuka (cold chinese-style noodles) (1), and nationality is to be fixed on cooling stave on the furnace shell (7).
According to Fig. 3, the pattern that hot side (2) is cast boss is welded into an integral body as the foundry goods (8) of boss inner core and hot side (2), and then welds with huyashi-chuuka (cold chinese-style noodles) (1).Cast out cooling-water duct (9) on boss inner core (8), passage (9) does not link to each other self-organizing system mutually with passage (3).
Cooling wall of the present invention is owing to having adopted the steel-casting that separates to be welded, so have lot of advantages. At first be that it has adopted the mild steel casting, and the properties of mild steel is better than cast iron, giving phase in its service life can be above 10 year. On the other hand, cooling wall of the present invention curves cooling water pipeline without seamless steel pipe, but directly pipeline is cast on the hot side foundry goods, the benefit of doing like this is to design pipe-line system according to the thermic load situation of cooling wall reality, can arrange very closely between the pipeline. Pipeline also can arrange equably at the position at four angles of cooling wall simultaneously, has so just solved for a long time cooling wall bight cooling capacity shortcoming not enough and that damage easily. In order to increase the heat exchange area of cooling water channel, the best way be the cross sectional shape of cooling water channel is done orthogonal or oval. But actually, attempt the cross section be rectangle or oval-shaped chapped pipe to curve satisfactory cooling water pipeline be very difficult, or even impossible. Adopting the present invention then can be easy to cast out the cross section at foundry goods is rectangle or oval-shaped pipeline.
Traditional cooling wall in use because thermal expansion can make furnace shell that water inlet pipe and water outlet pipe is produced a shearing force, and under the effect of this shearing, water inlet pipe and water outlet pipe may be cut off, causes cooling water to interrupt the accident that cooling wall is burned. For this reason, common way is to add a protection tube at water inlet pipe and water outlet pipe, and shearing force is acted on the protection tube. Make protection tube really can play the effect of protection water inlet pipe and water outlet pipe, must guarantee has certain gap between two pipes. But before the present invention, during the cooling wall monoblock cast, be easy to make the molten iron filling between two pipes, protection tube was lost efficacy. Adopt the present invention, be connected on the cooling wall with engage thread afterwards because protection tube and water inlet pipe and water outlet pipe are castings, so can guarantee gap certain between two pipes. This is to prevent the cut off the water supply effective measures of accident of cooling wall.
Before the present invention, cooling wall is used bolt with being connected of furnace shell, but used method is in whole cooling wall with bolt-through, a hot side that is exposed to cooling wall of bolt, when the furnace lining etch is fallen, after cooling wall was exposed, bolt will bear very high temperature at an end of hot side, and bolt just can damage inefficacy after a period of time like this. For fear of this situation, the best way adopts stud to fix cooling wall exactly, and of bolt is connected with the huyashi-chuuka (cold chinese-style noodles) of cooling wall, avoids the impact of high temperature. But because the cast iron materials quality is more crisp, before the present invention, in fact can not adopt this method. Because cooling wall of the present invention adopts the mild steel casting, this connected mode can guarantee that the bolt temperature is not higher than water temperature, has guaranteed the safety of bolt.
In the present invention, the cooling-water duct with flanged stave all establishes one's own system. The benefit of doing like this is, if boss is burned, need only stop to supply water to projection section, and cooling wall can use as usual.
Because the present invention has above many advantages, so can make the lining of shaft by etch, after cooling wall is exposed, can also use more than 10 years by the slagging scorification skin, this just so that the generation furnace service life that blast furnace is repaiied in not reach more than 10 years. Compare with present case, can reduce in 1-2 time and repair. Blast furnace take volume as 2500M is example, repaiies required expense in once and is about 100,000,000 yuan. The revision of the convention needs three months in each, if the capacity factor of a blast furnace is will lose 40.5 ten thousand tons of the pig iron in 1.8, three months. The pig iron per ton is in 285 yuan, repaiies in three months in then, and only the loss of one of iron is 1.15 hundred million yuan. That is the economic benefit of, repairing in every minimizing once is 2.15 hundred million yuan. This shows, cause that because the cast steel cooling wall processing capacity increases the increase of cost is inappreciable.
Claims (4)
1, a kind of caststeel cooling wall of weldable type that is used for blast furnace; formed by water inlet pipe and water outlet pipe [4], protective tube [5], standing bolt [6] and the cooling stave body that comprises cooling water pipeline; it is characterized in that the cooling stave body is welded by huyashi-chuuka (cold chinese-style noodles) [1], hot side [2] or boss a few part soft steel foundry goods such as [8], cooling water pipeline [3] is at the certain position casting of foundry goods.
2, cooling stave according to claim 1, the cross-sectional shape that it is characterized in that cooling water pipeline (3) are rectangle or ellipse garden shape.
3, cooling stave according to claim 1 and 2 is characterized in that water inlet pipe and water outlet pipe (4) and protective tube (5) thereof all adopt engage thread to link to each other with cooling stave.
4, cooling stave according to claim 3 is characterized in that the fixing threaded stud of cooling stave (6) is installed in the huyashi-chuuka (cold chinese-style noodles) of cooling stave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101904 CN87101904A (en) | 1987-03-12 | 1987-03-12 | Caststeel cooling wall of weldable type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101904 CN87101904A (en) | 1987-03-12 | 1987-03-12 | Caststeel cooling wall of weldable type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87101904A true CN87101904A (en) | 1987-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87101904 Pending CN87101904A (en) | 1987-03-12 | 1987-03-12 | Caststeel cooling wall of weldable type |
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| CN (1) | CN87101904A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935724A (en) * | 2010-09-17 | 2011-01-05 | 中冶京诚工程技术有限公司 | Protection device of water inlet/outlet pipe of cooling wall |
| CN101638160B (en) * | 2008-11-13 | 2011-07-20 | 周传禄 | Method for packaging high-furnace cooling wall |
| CN101421422B (en) * | 2006-04-18 | 2011-12-21 | 保尔伍斯股份有限公司 | Method of manufacturing a stave cooler for a metallurgical furnace and a resulting stave cooler |
| WO2012034312A1 (en) * | 2010-09-13 | 2012-03-22 | 汕头华兴冶金设备股份有限公司 | Copper cooling stave with pipe reinforcing structure |
| CN111334629A (en) * | 2020-01-03 | 2020-06-26 | 中冶华天工程技术有限公司 | Cooling wall structure for improving cooling strength of blast furnace |
| CN112846650A (en) * | 2020-12-25 | 2021-05-28 | 河北万丰冶金备件有限公司 | Method for manufacturing cooling wall of blast furnace |
-
1987
- 1987-03-12 CN CN 87101904 patent/CN87101904A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101421422B (en) * | 2006-04-18 | 2011-12-21 | 保尔伍斯股份有限公司 | Method of manufacturing a stave cooler for a metallurgical furnace and a resulting stave cooler |
| CN101638160B (en) * | 2008-11-13 | 2011-07-20 | 周传禄 | Method for packaging high-furnace cooling wall |
| WO2012034312A1 (en) * | 2010-09-13 | 2012-03-22 | 汕头华兴冶金设备股份有限公司 | Copper cooling stave with pipe reinforcing structure |
| CN101935724A (en) * | 2010-09-17 | 2011-01-05 | 中冶京诚工程技术有限公司 | Protection device of water inlet/outlet pipe of cooling wall |
| CN111334629A (en) * | 2020-01-03 | 2020-06-26 | 中冶华天工程技术有限公司 | Cooling wall structure for improving cooling strength of blast furnace |
| CN112846650A (en) * | 2020-12-25 | 2021-05-28 | 河北万丰冶金备件有限公司 | Method for manufacturing cooling wall of blast furnace |
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Correction item: classification number Correct: C21B7/10 False: C12B7/10 Number: 40 Page: 28 Volume: 3 |
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