CN102534078A - Method for replacing cooling water pipe of cooling wall of blast furnace - Google Patents
Method for replacing cooling water pipe of cooling wall of blast furnace Download PDFInfo
- Publication number
- CN102534078A CN102534078A CN2010105880599A CN201010588059A CN102534078A CN 102534078 A CN102534078 A CN 102534078A CN 2010105880599 A CN2010105880599 A CN 2010105880599A CN 201010588059 A CN201010588059 A CN 201010588059A CN 102534078 A CN102534078 A CN 102534078A
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- Prior art keywords
- water
- cooled tube
- damaged
- blast furnace
- metallic hose
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- 238000001816 cooling Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000498 cooling water Substances 0.000 title abstract 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 4
- 230000009970 fire resistant effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000000571 coke Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Blast Furnaces (AREA)
Abstract
The invention provides a method for replacing cooling water pipes of a cooling wall of a blast furnace, which is characterized in that a damaged cooling water pipe is disconnected from front and rear cooling water pipes, and the front and rear cooling water pipes are connected through an external water pipe, so that cooling water passes through the damaged cooling water pipe and is directly circulated. Meanwhile, a metal hose penetrates into the damaged cooling water pipe, and the metal hose is connected to a replacement cooling water pipe communicated with an external water source through seamless steel pipes at two ends, so that cooling water in the metal hose forms a passage independently, and the cooling function is continuously realized. The invention realizes the quick replacement of the damaged cooling water pipe without influencing the normal water-through cooling of other cooling water pipes, eliminates the water leakage phenomenon into the blast furnace, avoids the coke ratio rise problem caused by furnace temperature reduction, recovers the cooling function of the damaged cooling water pipe, ensures the cooling effect of the cooling wall, and can prolong the service life of the cooling wall.
Description
Technical field
The invention belongs to iron-smelting blast furnace auxiliary facility field, relate in particular to the repairing replacement method after a kind of blast furnace ductile iron cooling stave water-cooled tube damages.
Background technology
The blast furnace stack cooling stave is made up of copper cooling stave and ductile iron cooling stave jointly, in ductile iron cooling stave, is provided with many water-cooled tubes, to guarantee the cooling performance of ductile iron cooling stave.The way of supplying water of water-cooled tube is taked closed cycle, is cooled off from bottom to top.Blast furnace is in normal productive process; Owing to receive the influence of many factors such as thermal stresses effect of variation and stove skin and cooling stave of burn into wearing and tearing, the furnace temperature of furnace charge; The local damage phenomenon very easily appears in cooling stave and water-cooled tube, in case and cooling stave and water-cooled tube breakage will be leaked in the blast furnace burner hearth, cause that temperature descends in the stove; Make about the coke ratio rising 5kg/t of blast furnace, and directly influence the formation of furnace lining in the stove.
In order to reduce calorific loss, the measure of control of taking usually are that water-cooled tube employing reduction hydraulic pressure, the minimizing water yield of breakage are controlled the water leakage to high furnace interior.This kind method reduces the water yield can not change the situation of in stove, leaking, thereby causes blast furnace coke ratio to raise.When cooling wall breakage is serious, have to the water-cooled tube two ends of breakage be blocked and not allow the cooling stave water flowing, thereby make this cooling stave lose refrigerating function.In addition, reduce the water yield and also be prone to cause the water yield to descend, reduce cooling intensity, shorten the work-ing life of other water-cooled tube with placed in-line other water-cooled tube of damaged water-cooled tube.Because stuck water-cooled tube position cooling intensity reduces, the heat flow rate per unit area of water-cooled tube increases thereby make on every side, makes it be easy to breakage, causes certain potential safety hazard to production.
Summary of the invention
The object of the invention aims to provide a kind of simple; Convenient and swift; Not influencing under the normal water flowing refrigerative condition, change the alternate water-cooled tube fast, cause the blast furnace cooling stave water-cooled tube of furnace temperature decline, coke ratio rising problem to repair the replacement method thereby avoid leaking.
For this reason, the solution that the present invention taked is:
A kind of blast furnace cooling stave water-cooled tube replacement method, its concrete grammar and step are:
1, is ready to a steel wire, one section water-cooled tube, centre plug with holes, two sections two ends and has weldless steel tube and external diameter of IT metallic hose less than the water-cooled tube internal diameter; Metallic hose one end has IT and outside screw, and the other end has outside screw.
2, when blast furnace staying, earlier with the forward and backward disconnection of damaged water-cooled tube, the normal water flowing of other water-cooled tubes; One section water-cooled tube to getting ready in advance then is connected on the forward and backward water-cooled tube of disconnection, makes water coolant pass through the do as usual circulation cooling of external water-cooled tube.
3, damaged water-cooled tube two ends are located to cut off reserving one section apart from shell of blast furnace, on one section damaged water-cooled tube reserving, get out a grout hole, and on grout hole, install valve additional.
4, steel wire is penetrated from damaged water-cooled tube one end, until coming out from the other end; Again the steel wire rear end is penetrated the plug interstitial hole and bind firm.
5, will be connected with stubborn being connected on the metallic hose of plug of steel wire, and spur the steel wire front end then metallic hose is slowly drawn in the damaged water-cooled tube, till metallic hose is all exposed in damaged water-cooled tube two ends.
6, two sections weldless steel tubes will getting ready are connected to the metallic hose two ends, and are again that two sections weldless steel tubes are firm with damaged water-cooled tube spot welding.
Two sections weldless steel tube the other ends that 7, will connect are connected respectively on the water-cooled tube, if metallic hose is water-tight after the water flowing, then two sections weldless steel tubes and damaged water-cooled tube two ends is added to weld and consolidate.
8, open the valve that is installed on the damaged water-cooled tube reservation section, fire-resistant grouting material is poured in the slit between metallic hose and the damaged water-cooled tube, fill the back valve-off.
Damaged water-cooled tube after said metallic hose length and two ends are reserved one section is isometric.
The length that said damaged water-cooled tube is reserved section is 250～550mm.
The length of said weldless steel tube is 150～250 mm.
Said plug screw thread is according to the supporting design of metallic hose IT size.
Said weldless steel tube IT is according to the supporting design of metallic hose outside screw size.
Beneficial effect of the present invention is:
1, water-cooled tube replacement method of the present invention is simple, is convenient to operation, and does not influence the normal water flowing cooling of other water-cooled tubes and carrying out smoothly of blast furnace production.
2, eliminated the phenomenon of in blast furnace, leaking, the coke ratio rising problem of avoiding furnace temperature to descend and cause can reduce about coke ratio 5kg/t.
3, recover to damage the refrigerating function of water-cooled tube, guaranteed the cooling performance of cooling stave.
4, the water-cooled tube behind the poling can form furnace lining, reduces the destructiveness of furnace charge to cooling stave, thereby prolongs the work-ing life of cooling stave.
Description of drawings
Accompanying drawing connects synoptic diagram for water-cooled tube replacement of the present invention.
Among the figure: ball valve 1, replacement water-cooled tube 2, external water-cooled tube 3, weldless steel tube 4, grouting valve 5, shell of blast furnace 6, rear portion water-cooled tube 7, metallic hose 8, grouting material 9, cooling stave 10, anterior water-cooled tube 11.
Embodiment
Accompanying drawing connects synoptic diagram for water-cooled tube replacement of the present invention.Visible by accompanying drawing, on the inwall of shell of blast furnace 6, be provided with a plurality of cooling staves 10, all be provided with many water-cooled tubes in each cooling stave 10.The present invention breaks off damaged water-cooled tube and rear portion water-cooled tube 7 earlier with anterior water-cooled tube 11; And then with directly connecting through one section external water-cooled tube 3 between rear portion water-cooled tube 7 that breaks off and the anterior water-cooled tube 11; Make and come water to cross damaged water-cooled tube directly to get into rear portion water-cooled tube 7, also be provided with ball valve 1 on the external water-cooled tube 3 in the anterior water-cooled tube 11.On the other hand; The present invention penetrates a metallic hose 8 in damaged water-cooled tube; Metallic hose 8 is connected on the replacement water-cooled tube 2 that communicates with external water source through the weldless steel tube 4 at two ends, makes the water coolant in the metallic hose 8 form a path separately, thereby can continue to realize refrigerating function.
The concrete steps of the present invention's blast furnace cooling stave water-cooled tube replacement method are:
1, material prepn:
Be ready to the external water-cooled tube of a steel wire, a section 3, plug that the centre is with holes, two sections two ends and have weldless steel tube 4 and external diameter of IT metallic hose 8 less than the water-cooled tube internal diameter; Metallic hose 8 one ends have internal and external screw thread, and the other end has outside screw.Owing to need to be connected between plug, metallic hose 8 and the weldless steel tube 4, so the plug outside screw, weldless steel tube 4 ITs must be according to the supporting design of internal and external screw thread size of metallic hose 8.The weldless steel tube 4 that embodiment chooses specifically be of a size of ￠ 42 * 200 mm; Damaged water-cooled tube after metallic hose 8 length and two ends are reserved one section is isometric, according to predefined reservation segment length 400mm and prevision stay in the shell of blast furnace 6, water-cooled tube length that cooling stave 10 is interior, confirm that metallic hose 8 length are 3000mm.Plug interstitial hole diameter is ￠ 3 mm, and steel wire is of a size of 2 * 4000 mm.
2, when blast furnace staying, earlier damaged water-cooled tube and rear portion water-cooled tube 7 are broken off the normal water flowing of other water-cooled tubes with anterior water-cooled tube 11.Then through external water-cooled tube 3 with coupling together again between rear portion water-cooled tube 7 that breaks off and the anterior water-cooled tube 11, make water coolant pass through the circulation that do as usual of external water-cooled tube 3 and cool off.
3, damaged water-cooled tube two ends are reserved the section back and cut off promptly keeping one section apart from shell of blast furnace 400mm place, damaged up water-cooled tube is reserved on the section and is got out a ￠ 30 mm circular holes, and on circular hole, installs DN25 grouting valve 5 additional.
4, steel wire is penetrated from damaged water-cooled tube one end, until coming out from the other end; Again the steel wire rear end is penetrated the plug interstitial hole and bind firm.
5, will be connected with stubborn being connected on the metallic hose 8 of plug of steel wire, and spur the steel wire front end then metallic hose 8 is slowly drawn in the damaged water-cooled tube, till metallic hose 8 is all exposed at damaged water-cooled tube two ends.
6, two sections weldless steel tubes 4 will getting ready are connected to metallic hose 8 two ends, and are with 35mm in the damaged water-cooled tube of weldless steel tube 4 indentations, then that two sections weldless steel tubes 4 are firm with damaged water-cooled tube spot welding again.
Two sections weldless steel tube 4 the other ends that 7, will connect are connected respectively on the replacement water-cooled tube 2, make it form an independent circulation path.After the water flowing the new path of inspection especially metallic hose 8 have or not and leak, if metallic hose 8 is water-tight, then with two sections weldless steel tubes 4 respectively with damaged water-cooled tube two ends add weld solid.
8, open the grouting valve 5 that is installed on the damaged water-cooled tube reservation section; Fire-resistant grouting material 9 is poured in the slit between metallic hose 8 and the damaged water-cooled tube; Close grouting valve 5 after filling; The grouting material 9 that solidifies voluntarily not only can firmly be fixed on metallic hose 8 in the damaged water-cooled tube, but also can play certain sealing and conduction of heat.
Claims (6)
1. blast furnace cooling stave water-cooled tube replacement method is characterized in that concrete grammar and step are:
(1), is ready to a steel wire, one section water-cooled tube, centre plug with holes, two sections two ends and has weldless steel tube and external diameter of IT metallic hose less than the water-cooled tube internal diameter; Metallic hose one end has IT and outside screw, and the other end has outside screw;
(2), when blast furnace staying, earlier with the forward and backward disconnection of damaged water-cooled tube, the normal water flowing of other water-cooled tubes; One section water-cooled tube to getting ready in advance then is connected on the forward and backward water-cooled tube of disconnection, makes water coolant pass through the do as usual circulation cooling of external water-cooled tube;
(3), damaged water-cooled tube two ends are being located to cut off reserving one section apart from shell of blast furnace, and on one section damaged water-cooled tube reserving, hole, install valve in the boring additional;
(4), steel wire is penetrated from damaged water-cooled tube one end, until coming out from the other end; Again the steel wire rear end is penetrated the plug interstitial hole and bind firm;
(5), the plug that will be connected with steel wire twists and to be connected on the metallic hose, spur the steel wire front end then metallic hose slowly drawn in the damaged water-cooled tube, till metallic hose is all exposed in damaged water-cooled tube two ends;
(6), two sections weldless steel tubes will getting ready are connected to the metallic hose two ends, and are again that two sections weldless steel tubes are firm with damaged water-cooled tube spot welding;
(7), two sections weldless steel tube the other ends that will connect are connected respectively on the water-cooled tube, if metallic hose is water-tight after the water flowing, then two sections weldless steel tubes and damaged water-cooled tube two ends is added to weld and consolidate;
(8), open and be installed at damaged water-cooled tube and reserve the valve on the section, fire-resistant grouting material is poured in the slit between metallic hose and the damaged water-cooled tube, fill valve-off afterwards.
2. blast furnace cooling stave water-cooled tube replacement method according to claim 1 is characterized in that, the damaged water-cooled tube after said metallic hose length and two ends are reserved a section is isometric.
3. blast furnace cooling stave water-cooled tube replacement method according to claim 1 is characterized in that, the length that said damaged water-cooled tube is reserved section is 250～550mm.
4. blast furnace cooling stave water-cooled tube replacement method according to claim 1 is characterized in that the length of said weldless steel tube is 150～250 mm.
5. blast furnace cooling stave water-cooled tube replacement method according to claim 1 is characterized in that, said plug screw thread is according to the supporting design of metallic hose IT size.
6. blast furnace cooling stave water-cooled tube replacement method according to claim 1 is characterized in that, said weldless steel tube IT is according to the supporting design of metallic hose outside screw size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105880599A CN102534078A (en) | 2010-12-15 | 2010-12-15 | Method for replacing cooling water pipe of cooling wall of blast furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105880599A CN102534078A (en) | 2010-12-15 | 2010-12-15 | Method for replacing cooling water pipe of cooling wall of blast furnace |
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| CN102534078A true CN102534078A (en) | 2012-07-04 |
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| CN2010105880599A Pending CN102534078A (en) | 2010-12-15 | 2010-12-15 | Method for replacing cooling water pipe of cooling wall of blast furnace |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114158A (en) * | 2013-03-14 | 2013-05-22 | 济钢集团有限公司 | Device for arranging pipes into blast furnace cooling wall |
| CN105969924A (en) * | 2016-07-20 | 2016-09-28 | 马鞍山市飞达波纹管制造有限公司 | Blast furnace cooling-wall cooling water pipe repairing method and structure thereof and pressure leakage detection device |
| CN106521062A (en) * | 2016-12-14 | 2017-03-22 | 四川德胜集团钒钛有限公司 | Repairing method of blast furnace cooling wall water cooling system |
| CN111041142A (en) * | 2018-10-15 | 2020-04-21 | 上海梅山钢铁股份有限公司 | Method for repairing water pipe of cooling wall of blast furnace |
| CN113201613A (en) * | 2021-05-12 | 2021-08-03 | 广东韶钢松山股份有限公司 | Maintenance method for cooling wall of blast furnace |
| CN114350870A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | Method for treating partial damage of cooling plate of blast furnace |
| CN114854913A (en) * | 2022-05-19 | 2022-08-05 | 宝武集团鄂城钢铁有限公司 | Method for repairing cooling vertical pipe jump connection in blast furnace |
Citations (1)
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|---|---|---|---|---|
| CN101550462A (en) * | 2009-04-24 | 2009-10-07 | 武汉威林炉衬材料有限责任公司 | Method for preparing water cooling system of blast furnace cooling wall |
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2010
- 2010-12-15 CN CN2010105880599A patent/CN102534078A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550462A (en) * | 2009-04-24 | 2009-10-07 | 武汉威林炉衬材料有限责任公司 | Method for preparing water cooling system of blast furnace cooling wall |
Non-Patent Citations (1)
| Title |
|---|
| 胡予秋等: "冷却壁修复技术在安钢2200m3高炉上的实施", 《炼铁》, vol. 26, no. 6, 31 December 2007 (2007-12-31), pages 34 - 35 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114158A (en) * | 2013-03-14 | 2013-05-22 | 济钢集团有限公司 | Device for arranging pipes into blast furnace cooling wall |
| CN105969924A (en) * | 2016-07-20 | 2016-09-28 | 马鞍山市飞达波纹管制造有限公司 | Blast furnace cooling-wall cooling water pipe repairing method and structure thereof and pressure leakage detection device |
| CN106521062A (en) * | 2016-12-14 | 2017-03-22 | 四川德胜集团钒钛有限公司 | Repairing method of blast furnace cooling wall water cooling system |
| CN111041142A (en) * | 2018-10-15 | 2020-04-21 | 上海梅山钢铁股份有限公司 | Method for repairing water pipe of cooling wall of blast furnace |
| CN111041142B (en) * | 2018-10-15 | 2021-10-19 | 上海梅山钢铁股份有限公司 | Method for repairing water pipe of cooling wall of blast furnace |
| CN113201613A (en) * | 2021-05-12 | 2021-08-03 | 广东韶钢松山股份有限公司 | Maintenance method for cooling wall of blast furnace |
| CN114350870A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | Method for treating partial damage of cooling plate of blast furnace |
| CN114854913A (en) * | 2022-05-19 | 2022-08-05 | 宝武集团鄂城钢铁有限公司 | Method for repairing cooling vertical pipe jump connection in blast furnace |
| CN114854913B (en) * | 2022-05-19 | 2023-06-27 | 宝武集团鄂城钢铁有限公司 | Method for repairing jump-connection of cooling vertical pipe in blast furnace |
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Application publication date: 20120704 |
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