CN106702047B - A method of it blocking large blast furnace furnace foundation coal gas sealing cover coal gas and leaps up leakage - Google Patents
A method of it blocking large blast furnace furnace foundation coal gas sealing cover coal gas and leaps up leakage Download PDFInfo
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- CN106702047B CN106702047B CN201510445377.2A CN201510445377A CN106702047B CN 106702047 B CN106702047 B CN 106702047B CN 201510445377 A CN201510445377 A CN 201510445377A CN 106702047 B CN106702047 B CN 106702047B
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Abstract
A method of it blocking large blast furnace furnace foundation coal gas sealing cover coal gas and leaps up leakage, it is characterised in that include that coal gas sealing cover blocks processing and coal gas sealing cover to the Dispose by grouting step of air port section：（1）Coal gas sealing cover block processing and（2）Coal gas sealing cover is handled to air port section using grouting way.The leap up method of leakage of the closures large blast furnace furnace foundation coal gas sealing cover coal gas of the present invention is pressed into plastics seal material with blast furnace mud jacking blocking technology by the grout hole opened on furnace body between furnace shell and resistance to material, it is filled up completely the gap between ramming mass in furnace shell and stove, reach and coal gas is prevented to be leaked to coal gas sealing cover string, using a part of constructing in blast fumance, it constructs again after blast furnace stopping damping down another part, reach the shortening damping down time and blast furnace sealing effect is apparent, the advantages of blast furnace stopping damping down time is short, reduction maintenance engineering cost.
Description
Technical field
The present invention relates to a kind of methods blocking gas leak, specifically, being a kind of closure large blast furnace furnace foundation coal gas
Sealing cover coal gas is leapt up the method for leakage.
Background technology
Iron-smelter 5800m3 blast furnaces were gone into operation more than 5 years, and operation of blast furnace is stablized.Exist at State of Blast Furnace based gas sealing cover in recent years big
Gas leak and combustion phenomena are measured, greatly harm is generated to blast fumance.By understanding scene, it is considered that furnace expansion
Furnace foundation coal gas sealing cover is caused to crack with concrete foundation, coal gas passes through carbon material crack blowby in stove to furnace foundation coal gas sealing cover lower part in stove
Crack and overflow.To ensure that blast furnace normally produces, it is necessary to carry out closure processing to furnace bottom gas leak region.Block the ring of processing
Border is severe, and blast furnace gas can lead to people's poisoning, it may also happen that explosion；The blast furnace stopping damping down time is short, general only 20 hours
Left and right.Therefore closure processing mode is carried out to furnace bottom gas leak region, method has harsh requirement.
Therefore known blast furnace stopping damping down prevents coal gas leakage of leaping up from blocking processing mode there is above-mentioned various inconvenient and ask
Topic.
Invention content
The purpose of the present invention is to propose a kind of using the adjustable encapsulation process in furnace foundation coal gas sealing cover lower part and shaft pressure
The closure large blast furnace furnace foundation coal gas sealing cover coal gas that slurry mode block processing is leapt up the method for leakage.
It is another object of the present invention to propose one kind in construction method, using a construction part, blast furnace in production
It constructs again after blowing out damping down another part, shortens the closure large blast furnace furnace foundation coal gas sealing cover coal gas of damping down time to reach and leap up leakage
Method.
To achieve the above object, technical solution of the invention is：
A method of it blocking large blast furnace furnace foundation coal gas sealing cover coal gas and leaps up leakage, it is characterised in that blocked including coal gas sealing cover
Handle the Dispose by grouting step to air port section with coal gas sealing cover：
Coal gas sealing cover closure is handled, and is included the following steps：
A, several 25mm, the hole of deep 150mm, in each hole are bored in the concrete foundation on the outside of coal gas sealing cover
Squeeze into 20mm, the expansion bolt of long 220mm；
B, it is 150mm to make several sections of width, and thickness is the curved plate of 8mm, radian and the coal gas sealing cover of curved plate
The radian of facade steel plate is consistent, so that each section of curved plate can be welded with coal gas sealing cover facade steel plate；The length of each section of curved plate
Degree differs, and at interval of 1000mm on curved plate, bores the hole of a 22mm, makes the hole on curved plate and concrete foundation
On hole location correspond to；
C, when blast furnace staying, on coal gas sealing cover circumferencial direction, coal gas sealing cover facade steel plate and expansion bolt screw rod inside
Between be laid side by side the ceramic fibre rope of 2 30mm, and so that curved plate is pushed down one and overlapped by two ceramic fibre rope fag ends
Made of connector；The ceramic fibre rope of 1 30mm is laid on expansion bolt screw rod outer circumference direction；
D, when blast furnace staying, the curved plate made is placed by expansion bolt on ceramic fibre rope, to each arc
Butt welding is carried out between steel plate, is then tightened expansion bolt nut and is compressed ceramic fibre rope, to seal curved plate and coagulation
Earth foundation；
E, when blast furnace staying, after tightening expansion bolt nut, full weld is carried out between curved plate and sealing cover facade steel plate；
（2）Coal gas sealing cover is handled to air port section using grouting way, is included the following steps：
A, grouting injection hole site and and its quantity are determined
Blast Furnace Bottom without be arranged between the coal gas sealing cover top outside cooled region last furnace shell and furnace bottom sealing plate lower part it is upper,
Lower twice grouting injection orifice ring, 30 grouting injection holes are arranged per ring；Below the paragraph 1 cooling wall with above furnace bottom water cooling tube into
The intensive setting grouting injection hole of row, grouting injection hole number is 30；It is uniformly arranged according to circumferencial direction in 2-4 sections of cooling walls
Be in the milk injection hole, wherein 8 grouting injection holes of every section of setting；
B, magnetic force coring mode is taken to make grouting injection hole
The position that magnetic force coring mode determines outside last furnace shell is taken to open the grouting injection hole of 25mm, according to actual conditions
Diameter 14mm bit bores are first used, are drilled to cooling wall huyashi-chuuka (cold chinese-style noodles) position, then cavity is cleared up with electric hammer, and will be miscellaneous in grouting injection hole
Object is cleaned out, and ensures that pressing-in grouting material has unimpeded indentation channel；
C, setting grouting injection hole
Setting grouting injection hole：After making grouting injection hole, the last furnace shell external welding single head silk in grouting injection aperture
Length 200mm, diameter 50mm short circuit steel pipes, while installing φ 50mm cut-off ball valve on short circuit steel pipe and valve is kept to be in
Open state, and quick coupling is installed on cut-off ball valve；Before grouting material indentation construction to the welding effects of all pads into
Row checks, ensures that cut-off ball valve is in open state, the hole that grouting material has been pressed into, at cut-off ball valve in grouting material process of press in
In closed state；
D, pressing-in grouting material
It is bottom-up construct in the pressing-in grouting material in injection hole that is in the milk, pressure control：Each grouting injection hole is most
High pressure is controlled in 40kg/cm2, it is considered as dead hole, pressure rise to 30kg/cm beyond this pressure2When to be considered as pressure full, the 3rd, 4
Section cooling wall operation pressure control is in 30 kg/cm2Hereinafter, pressure rise is to 20 kg/cm2When to be considered as pressure full；Such as there is adjacent filling
The case where slurry injection hole discharging, is considered as holes perforation, and the reasonable quantity for being pressed into material increases；During pressing-in grouting material, in detail
Record the indentation material quantity and pressure changing in each hole.
The leap up method of leakage of the closure large blast furnace furnace foundation coal gas sealing cover coal gas of the present invention can also be arranged using technology below
It applies to further realize.
Method above-mentioned, wherein described hole are located at from coal gas sealing cover facade steel plate 100mm circumferencial directions, between hole
Away from for 1000mm.
Method above-mentioned, wherein two ceramic fibre ropes（9）Two ceramic fibres in connector made of fag end overlap joint
Connector overlap length >=100mm of rope.
Method above-mentioned, wherein stagger setting between the upper and lower ring in position of the grouting injection hole.
Method above-mentioned, wherein the pressing-in grouting material is plastics seal material.
Method above-mentioned, wherein the maximum pressure of the pressing-in grouting material is controlled in 40 kg/cm2。
After adopting the above technical scheme, the closure large blast furnace furnace foundation coal gas sealing cover coal gas of the present invention is leapt up, the method for leakage has
Following advantages：
1, blast furnace mud jacking blocking technology is that the grout hole by being opened on furnace body is pressed into plasticity between furnace shell and resistance to material
Sealing material is filled up completely the gap between ramming mass in furnace shell and stove, reaches and coal gas is prevented to be leaked to coal gas sealing cover string；
2, a part of using constructing in blast fumance, another part of constructing again after blast furnace stopping damping down reaches shortening and stops
The wind time；
3, blast furnace sealing effect is apparent, and the blast furnace stopping damping down time is short, reduces maintenance engineering cost.
Description of the drawings
Fig. 1 is the large blast furnace of the embodiment of the present invention and the structural schematic diagram of furnace foundation coal gas sealing cover；
Fig. 2 is the enlarged drawing at the positions A in Fig. 1.
In figure：1 paragraph 1 cooling wall, 2 the 2nd sections of cooling walls, 3 the 3rd sections of cooling walls, 4 the 4th sections of cooling walls, 5 the 5th sections of coolings
Wall, 6 furnace bottom sealing plates, 7 coal gas sealing covers, 8 coal gas sealing cover facade steel plates, 9 ceramic fibre ropes, 10 expansion bolts, 11 curved plates, 12
Concrete, 13,14.
Specific implementation mode
With reference to embodiments and its attached drawing illustrates further the present invention.
Embodiment 1
A method of it blocking large blast furnace furnace foundation coal gas sealing cover coal gas and leaps up leakage, it is characterised in that blocked including coal gas sealing cover
Handle the Dispose by grouting step to air port section with coal gas sealing cover：
Referring now to Fig. 1 and 2, Fig. 1 is the large blast furnace of the embodiment of the present invention and the structural schematic diagram of furnace foundation coal gas sealing cover,
Fig. 2 is the enlarged drawing at the positions A in Fig. 1.
（1）Coal gas sealing cover closure is handled, and is included the following steps：
A, on the outside of the coal gas sealing cover in concrete foundation on circumferencial direction at sealing cover facade steel plate 100mm, at interval of
1000mm bores the hole of a 150mm* 25mm.It hits the person in each hole the expansion bolt of 220mm* 20mm；
B, it is 150mm to make width, and thickness is the curved plate of 8mm, the radian of the radian and coal gas sealing cover of curved plate
Unanimously, ensure to dock completely when welding below, even weld.The length of every section of curved plate differs, in curved plate
On at interval of 1000mm, bore the hole of a 22mm, ensure that the hole on steel plate is consistent with the hole in concrete foundation；
C, when blast furnace staying, on sealing cover circumferencial direction, 2 30mm of laying between sealing cover facade steel plate and expansion bolt
Ceramic fibre rope ensures that one connector of ceramic fibre rope, connector are overlapped 100mm.1 is laid on expansion bolt outer circumference direction
The ceramic fibre rope of 30mm ensures that one connector of ceramic fibre rope, connector are overlapped 100mm；
D, when blast furnace staying, the curved plate made is placed by expansion bolt on ceramic fibre rope, to every piece of arc
Shape steel plate carries out butt welding, then tightens expansion bolt nut, by pressure ceramic cordage, sealing steel plate and coagulation soil matrix
Plinth；
E, when blast furnace staying, after tightening expansion bolt nut, full weld is carried out to curved plate and sealing cover facade steel plate；
（2）Coal gas sealing cover is handled to air port section using mud jacking mode, is included the following steps：
A, the hole of diameter 25mm is opened in the position specified outside furnace shell, and magnetic force coring mode is taken in drilling, it is ensured that furnace shell safety.
Cavity is cleared up with electric hammer（A diameter of 14mm of electric hammer drill）, pierce depth determines according to actual conditions, preferably drill to cooling
Wall huyashi-chuuka (cold chinese-style noodles) position.And sundries in hole should be cleaned out, ensure that press-in material has unimpeded indentation channel, improves pressing-in grouting effect
Fruit；
B, burn-on the length 200mm of single head silk after trepanning, diameter 50mm short circuit steel pipes, while pacifying on short circuit steel pipe
Dress φ 50mm cut-off ball valves simultaneously keep valve to be in open state；Quick coupling is installed on cut-off ball valve.It is right before indentation construction
The welding effect of all pads is checked, ensures welding effect；Ensure that cut-off ball valve is in open state in process of press in,
The hole being pressed into, cut-off ball valve are closed；
C, position of opening and quantity
Furnace bottom cold area free, in coal gas sealing cover top and furnace bottom sealing plate lower part totally two ring, per number of rings amount 30；It is cold in paragraph 1
But below wall, intensive trepanning, quantity 30 are carried out above furnace bottom water cooling tube；It is uniformly distributed according to circumferencial direction in 2-4 sections of cooling walls
Trepanning, every section is opened 8.The above-mentioned progress that is staggered up and down per annular distance hole；
D, after trepanning, bottom-up progress mud jacking construction.Pressure controls：The maximum pressure control of each press-in hole exists
40 kg/cm2(4.0MPa) is considered as dead hole, pressure rise to 30kg/cm beyond this pressure2When be considered as that pressure is full, and the 3rd, 4 section cold
But the control of wall operation pressure is in 30 kg/cm2Hereinafter, pressure rise is to 20 kg/cm2When to be considered as pressure full；Such as there is adjacent holes discharging
The case where be considered as holes perforation, being pressed into the quantity of material can suitably increase.During pressing people, the indentation in each hole is recorded in detail
Material quantity and pressure changing.
The present invention has substantive distinguishing features and significant technological progress, closure large blast furnace furnace foundation coal gas sealing cover of the invention
Coal gas is leapt up the method for leakage, and wherein blast furnace mud jacking blocking technology is grout hole by being opened on furnace body between furnace shell and resistance to material
It is pressed into plastics seal material, is filled up completely the gap between ramming mass in furnace shell and stove, reaches and coal gas is prevented to be leaked to coal gas sealing cover string
Purpose；Meanwhile flexible adjustable formula sealing structure is made on the outside of State of Blast Furnace based gas sealing cover, further prevent gas leak.
The present invention uses a part of constructing in blast fumance, another part of constructing again after blast furnace stopping damping down, when reaching shortening damping down
Between.
Above example is used for illustrative purposes only rather than limitation of the present invention, the technology people in relation to technical field
Member, without departing from the spirit and scope of the present invention, can also make various transformation or variation.Therefore, all equivalent
Technical solution should also belong to scope of the invention, should be limited by each claim.
Claims (6)
- A kind of method of leakage 1. closure large blast furnace furnace foundation coal gas sealing cover coal gas is leapt up, it is characterised in that at coal gas sealing cover closure Manage the Dispose by grouting step to air port section with coal gas sealing cover：（1）Coal gas sealing cover closure is handled, and is included the following steps：A, in coal gas sealing cover（7）The concrete in outside（12）On the basis of bore several 25mm, the hole of deep 150mm, in each hole Inside squeeze into 20mm, the expansion bolt of long 220mm；B, it is 150mm to make several sections of width, and thickness is the curved plate of 8mm（11）, radian and the coal gas sealing cover of curved plate Facade steel plate（8）Radian it is consistent, so that each section of curved plate can be welded with coal gas sealing cover facade steel plate；Each section of curved plate Length differs, and at interval of 1000mm on curved plate, bores the hole of a 22mm, makes the hole on curved plate and coagulation soil matrix Hole location on plinth corresponds to；C, when blast furnace staying, on coal gas sealing cover circumferencial direction, coal gas sealing cover facade steel plate（8）With expansion bolt（10）In screw rod The ceramic fibre rope of 2 30mm is laid side by side between side（9）, and make curved plate（11）One is pushed down by two ceramic fibres Rope（9）Connector made of fag end overlap joint；Expansion bolt（10）The ceramic fibre of 1 30mm is laid on screw rod outer circumference direction Rope（9）；D, when blast furnace staying, the curved plate made is placed by expansion bolt on ceramic fibre rope, to each curved plate Between carry out butt welding, then tighten expansion bolt nut compress ceramic fibre rope, to seal curved plate and coagulation soil matrix Plinth；E, when blast furnace staying, after tightening expansion bolt nut, full weld is carried out between curved plate and sealing cover facade steel plate；（2）Coal gas sealing cover is handled to air port section using grouting way, is included the following steps：A, grouting injection hole site and and its quantity are determinedBlast Furnace Bottom without outside cooled region last furnace shell coal gas sealing cover top and furnace bottom sealing plate（6）On being arranged between lower part, Lower twice grouting injection orifice ring, 30 grouting injection holes are arranged per ring；In paragraph 1 cooling wall（1）On lower section and furnace bottom water cooling tube The intensive setting grouting injection holes of Fang Jinhang, grouting injection hole number is 30；In 2-4 sections of cooling walls（2,3,4）According to circumference Direction is uniformly arranged grouting injection hole, wherein 8 grouting injection holes of every section of setting；B, magnetic force coring mode is taken to make grouting injection holeIt takes the position that magnetic force coring mode determines outside last furnace shell to open the grouting injection hole of 25mm, is first used according to actual conditions Diameter 14mm bit bores drill to cooling wall huyashi-chuuka (cold chinese-style noodles) position, then clear up cavity with electric hammer, and sundries is clear in the injection hole that will be in the milk Reason is clean, ensures that pressing-in grouting material has unimpeded indentation channel；C, setting grouting injection holeSetting grouting injection hole：After making grouting injection hole, in the length of the last furnace shell external welding single head silk in grouting injection aperture 200mm, diameter 50mm short circuit steel pipes are spent, while φ 50mm cut-off ball valves being installed on short circuit steel pipe and valve is kept to be in unlatching State, and quick coupling is installed on cut-off ball valve；The welding effect of all pads is examined before grouting material indentation construction It looks into, ensures that cut-off ball valve is in open state in grouting material process of press in, cut-off ball valve is in and closes by the hole that grouting material has been pressed into Closed state；D, pressing-in grouting materialIt is bottom-up construct in the pressing-in grouting material in injection hole that is in the milk, pressure control：The maximal pressure of each grouting injection hole Power is controlled in 40kg/cm2, it is considered as dead hole, pressure rise to 30kg/cm beyond this pressure2When be considered as that pressure is full, and the 3rd, 4 section cold But the control of wall operation pressure is in 30 kg/cm2Hereinafter, pressure rise is to 20 kg/cm2When to be considered as pressure full；Such as there is adjacent grouting note The case where entering hole discharging is considered as holes perforation, and the reasonable quantity for being pressed into material increases；During pressing-in grouting material, record in detail The indentation material quantity and pressure changing in each hole.
- The method of leakage 2. closure large blast furnace furnace foundation coal gas sealing cover coal gas as described in claim 1 is leapt up, which is characterized in that described Hole is located at from coal gas sealing cover facade steel plate（8）On 100mm circumferencial directions, the spacing of hole is 1000mm.
- The method of leakage 3. closure large blast furnace furnace foundation coal gas sealing cover coal gas as described in claim 1 is leapt up, which is characterized in that described Two ceramic fibre ropes（9）Connector overlap length >=100mm of two ceramic fibre ropes in connector made of fag end overlap joint.
- The method of leakage 4. closure large blast furnace furnace foundation coal gas sealing cover coal gas as described in claim 1 is leapt up, which is characterized in that described Stagger setting between the upper and lower ring in position of grouting injection hole.
- The method of leakage 5. closure large blast furnace furnace foundation coal gas sealing cover coal gas as described in claim 1 is leapt up, which is characterized in that described Pressing-in grouting material is plastics seal material.
- The method of leakage 6. closure large blast furnace furnace foundation coal gas sealing cover coal gas as described in claim 1 is leapt up, which is characterized in that described The maximum pressure of pressing-in grouting material is controlled in 40 kg/cm2。
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| CN201510445377.2A CN106702047B (en) | 2015-07-27 | 2015-07-27 | A method of it blocking large blast furnace furnace foundation coal gas sealing cover coal gas and leaps up leakage |
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| CN201510445377.2A CN106702047B (en) | 2015-07-27 | 2015-07-27 | A method of it blocking large blast furnace furnace foundation coal gas sealing cover coal gas and leaps up leakage |
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| CN106702047B true CN106702047B (en) | 2018-07-13 |
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| CN109852751A (en) * | 2019-04-15 | 2019-06-07 | 北京瑞普同创科技发展有限公司 | A kind of blast-furance cement foundation pier blowby coal gas defect administering method |
| CN111534658A (en) * | 2020-05-29 | 2020-08-14 | 鞍钢股份有限公司 | Method for detecting air gap between blast furnace shell and cooling wall |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392086A (en) * | 2011-11-21 | 2012-03-28 | 安阳钢铁股份有限公司 | Large blast furnace body gas leakage prevention method |
| CN203007289U (en) * | 2012-12-27 | 2013-06-19 | 安阳钢铁股份有限公司 | Tuyere sleeve sealing device of large blast furnace |
| CN103866065A (en) * | 2012-12-17 | 2014-06-18 | 天津天铁冶金集团有限公司 | Leak stopping method for tuyere large sleeve |
-
2015
- 2015-07-27 CN CN201510445377.2A patent/CN106702047B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392086A (en) * | 2011-11-21 | 2012-03-28 | 安阳钢铁股份有限公司 | Large blast furnace body gas leakage prevention method |
| CN103866065A (en) * | 2012-12-17 | 2014-06-18 | 天津天铁冶金集团有限公司 | Leak stopping method for tuyere large sleeve |
| CN203007289U (en) * | 2012-12-27 | 2013-06-19 | 安阳钢铁股份有限公司 | Tuyere sleeve sealing device of large blast furnace |
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