CN204174222U - The repair structure of iron-making heat wind furnace hot air duct and repairing mould thereof - Google Patents
The repair structure of iron-making heat wind furnace hot air duct and repairing mould thereof Download PDFInfo
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- CN204174222U CN204174222U CN201420687643.3U CN201420687643U CN204174222U CN 204174222 U CN204174222 U CN 204174222U CN 201420687643 U CN201420687643 U CN 201420687643U CN 204174222 U CN204174222 U CN 204174222U
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Abstract
The utility model relates to a kind of repair structure and repairing mould thereof of iron-making heat wind furnace hot air duct, and hot air duct has metal pipe-wall, and repair structure comprises shell and pouring layer, and shell welds with metal pipe-wall, and pouring layer is high strength ceramics wear-resistant material.Repairing mould comprises arc and screw rod, arc offers open holes, open holes internal fixtion has installation cell body, the outside surface installing cell body welds with open holes, install in cell body and there is internal thread, screw rod one end has outside screw, and the outside screw of screw rod is threaded mutually with the internal thread installing cell body.The utility model eliminates building process layer by layer complicated especially in pipeline of hot air furnace repairing or maintenance process, and repairing mould structure is simple, easy fabrication and installation; Solving blast-furnace hot-air pipeline makes its key brick insufficient strength cause the bottleneck problem of subsiding because use temperature is too high, general produce in occur hot air duct subside problem time all can be dealt with in time.
Description
Technical field
The utility model relates to iron-making heat wind furnace hot air duct recovery technique, particularly a kind of repair structure of iron-making heat wind furnace hot air duct and repairing mould thereof.
Background technology
Current metallurgy industry iron-smelting blast furnace all needs the high-temperature gas Combustion of Hot Air Furnace blast furnace gas supporting for blast furnace produces to deliver in blast-furnace tuyere by hot air duct, and it is the prerequisite that blast furnace is normally produced.Under the iron and steel metallurgy enterprise situation of current rigorous, each iron and steel enterprise, in order to have one seat in current steel market, except ensureing quality product, is all reducing production cost by fair means or foul.The more method of present use improves blast furnace air-supply wind-warm syndrome, and wind-warm syndrome rises to degree more than 1,200 from more than 1,100 degree, then increases Rich Oxygen Amount, thus can increase the winding-up amount of blast-furnace coal powder, the usage quantity of minimizing coke and reduce the production cost of fuel.Certainly, we improve blast furnace air temperature and the fault of hot-air system will certainly be caused to increase, and this is conflict, and particularly hot air duct needs to bear very large pressure.
Many times, due to life-time service high wind-warm syndrome, and hot air duct the cause for quality such as to be built by laying bricks or stones because of certain and is failed to reach service requirements, and the effect of the heavy brick deadweight of to build by laying bricks or stones due to pipe interior, the resistance to materials such as conduit upper key brick generally will be caused to subside, and the resistance to material position of Lower Half due to stressed in duct bottom, generally all there will not be, quality is guaranteed.If high-temperature hot-air directly will carry out softening washing away to lacking the heat insulation metallic conduit of insulating brick after the partial collapse of resistance to material of top, thus make its bearing resistance damaged not, hot air duct just can not normally be blown work, just there will be production safety problem, and then cause the unplanned damping down stopping platform of blast furnace.To now, we just have to the work in the face of how repairing hot air duct, otherwise will cause larger financial loss.Unplanned damping down down time is shorter, will be less on the impact of blast furnace, and the ability that blast furnace returns to normal production again is larger, and financial loss is also fewer.
As shown in Figure 1 and Figure 2, normal circumstances, the blast-furnace hot-air pipeline of economic structure is the tubular outer layer of steel construction, what be and then adjacent to metal pipe-wall 1 is heat insulation pouring layer with anchor nails, it can make up because producing the isolation action that metal pipe-wall 1 is passed to hot blast in minute quantity gap when insulating brick is built by laying bricks or stones, the inside is light thermal-insulation brick layer again, and it has excellent incubation and thermal insulation function, and the inside is the heavy pipeline brick that not only high temperature resistant but also resistance to hot blast washes away.Like this, once after hot air duct damage, we can carry out repair according to the project organization of original pipeline.Generalized case, when hot air duct top is built by laying bricks or stones, we all need first in pipeline the first half construct pipeline backform, then could on innermost layer is built heavy pipeline brick, generally only have one deck.Then we build light-weight insulating brick again, conventional two-layer.Outermost still overlays on outside surface with the curved plate pouring into a mould insulated pouring material, carries out repair by welding.Finally we check after needing to carry out examination air-supply that weld seam confirms to terminate patch work after leaking out.
Certainly; because the steel construction internal surface when rushing to repair to new soldering; we cannot carry out heat insulation pouring layer again in metal pipe internal wall; better for ensureing effect of heat insulation; also between metal level and light thermal-insulation brick layer, lagging material can be made with one deck alumina silicate fibre blanket when we repair; the such treatment effect of generalized case can be quite a lot of, and particularly assembled weld often can use this method.Usually, carry out such service work in process of production to take time very much, the pipeline place temperature of mainly just having broken is high, and personnel cannot be close, equitemperature places under repair after reducing again will incur loss through delay the Best Times that blast furnace returns to normal production, and then results in greater loss.And, to pipeline from level to level to build requirement by laying bricks or stones also high, if the undertighten of building by laying bricks or stones is firm, also again can cause damage.But rush to repair in that difficult situation, you will hold masonry quality pass, are also very difficult.Therefore have many times, we also need the time of looking for look for chance again to process breakage.
Utility model content
The technical problems to be solved in the utility model is: in order to overcome the maintenance after cannot solving hot air duct damage over the years very well or repairing work, the deficiency that remediation efficiency is low, the utility model provides a kind of repair structure and repairing mould thereof of iron-making heat wind furnace hot air duct.
The utility model solves the technical scheme that its technical problem adopts: a kind of repair structure of iron-making heat wind furnace hot air duct, described hot air duct has metal pipe-wall, repair structure comprises shell and pouring layer, and described shell welds with metal pipe-wall, and described pouring layer is high strength ceramics wear-resistant material.Normal production is requirement pipe interior high-temperature gas and external metallization pipeline is isolation, namely should ensure that internal high temperature gas can reduce thermal losses to the greatest extent and deliver in blast-furnace body, also want heat can not be transmitted to metallic conduit wall portion by the refractory materials of isolation to distribute, so need good effect of heat insulation.Otherwise heat can not pass in blast furnace and go, also metallic conduit strength degradation or damaged can be caused.Adopt high strength ceramics wear-resistant material as pouring layer, hot air duct can be made to be incubated and can wash away by low heat resistanceheat resistant wind.
Described high strength ceramics wear-resistant material is high strength ceramics wear-resistant material TCJ-1.High strength ceramics wear-resistant material TCJ-1 is the high strength ceramics wear-resistant material product type that good luck auspicious company limited in Gongyi City of Henan Province produces, its physical and chemical index is: aluminum oxide is more than or equal to 70 percent, refractoriness is more than or equal to 1790 degrees Celsius, and volume density is more than or equal to 2.75 tons every cube.Importantly, its compressive strength, folding strength low temperature and high temperature all higher, and compressive strength raises with temperature, and performance is relatively better.After its burning, Linear change rate only has positive and negative about 0. 25 percent at 1400 DEG C in addition, does not almost have volume change.Simultaneously its thermal shock resistance is also better, not easily varies with temperature and broken.Therefore, high strength ceramics wear-resistant material TCJ-1 can be incubated, and can play again the resistance to material of antiscour effect, using the refractory materials of high strength ceramics wear-resistant material TCJ-1 as hot air duct, just reaches the object making hot air duct can be incubated and can resist hot blast to wash away.
A kind of repairing mould of the repair structure for described iron-making heat wind furnace hot air duct, comprise arc and screw rod, described arc offers open holes, described open holes internal fixtion has installation cell body, the outside surface of described installation cell body welds with described open holes, have internal thread in described installation cell body, described screw rod one end has outside screw, and the outside screw of described screw rod is threaded mutually with the internal thread installing cell body.
Described screw jacket is provided with service sleeve.
Described arc is arc line shaped along the cross section of hot air duct radial direction, and on arc, submarginal position offers four uniform open holess, and each open holes internal thread connects a screw rod.
When overhauling the hot air duct subsided at ordinary times, be ensure Repair strength and repair the life-span, 1/3rd of the about whole circle in top damaging part pipeline can be pulled down, remaining position need not because remaining general they can not subside because of some external factor.Therefore, as preferably, the described arc central angle right along the cross section of hot air duct radial direction is 120 °.
Described arc is curved plate.
Being poured into effectively quickly in pipeline by high strength ceramics wear-resistant material is the key to the issue of whole construction node, is below key step:
The first step, cuts off the hot air duct shell subregion of building damaged location by laying bricks or stones, is cleaned out by the refractory materials come off;
Second step, puts into ready-made repairing mould in pipeline and by the screw rod on mould and pipeline or platform support fixation, the open holes of screw rod and the size of supporting screw rod are adjusted according to weight such as mould material and selected;
3rd step, anchor nails on the hot air duct metal pipe-wall lower weld cut off, anchor nails is in " Y " font, and opening angle is 120 °, matrix pattern structure distribution;
4th step, builds high strength ceramics wear-resistant material in inlet pipe road, and utilizes vibrating head to make firm by ramming closely, control well thickness and finishing appearance;
5th step, returns to the hot air duct metal pipe-wall being welded with anchor nails and bottom and being equipped with alumina silicate fibre blanket the shell original pipeline becoming repair structure;
6th step, is fixed by certain hour solidification forming, the service sleeve removed the screw rod on repairing mould and build;
7th step, high strength ceramics wear-resistant material is built to pipeline hole position and fixing end according to above-mentioned steps by pipeline screw rod being removed position;
8th step, checks mould material and repair by welding part, until part of not leaking out terminates service work by examination air-supply.
If when the hot air duct caused because of burst accident damages, repairing mould is put into and needs to repair part, then pour into a mould high strength ceramics wear-resistant material in time according to above-mentioned steps, damaged part can be repaired very soon equally.
In the repair structure of this novel iron-making heat wind furnace hot air duct, for ensureing not easily to occur the problem that upper pipe brick subsides from now on, also just the repair method of high strength ceramics wear-resistant material cast can be adopted to construct according to conduit upper 1/3rd position manufacturing and designing the stage at the beginning, process of laying bricks need not be carried out, the problem that generally also there will not be upper pipe brick to subside in hotblast stove generation furnace life use procedure from now on, construction quality is all secure.
The repair structure of iron-making heat wind furnace hot air duct of the present utility model and repairing mould thereof, beneficial effect is mainly manifested in:
One, building process layer by layer complicated especially in pipeline of hot air furnace repairing or maintenance process is eliminated, because the quality of building multilayer key brick under high-temperature situation in pipeline by laying bricks or stones cannot ensure, once there be brickwork joint to leak out, channel to tube wall with regard to having hot blast and cause pipeline appearance to generate heat, thus causing pipeline breaking, vault again subsides and damages hot air duct;
Two, hot air duct repairing mould structure is simple, easy fabrication and installation, and under it also avoid the pipeline condition of high temperature, personnel enter the severe environment that pipeline is built by laying bricks or stones simultaneously; Can complete repair at pipeline external, significantly reduce difficulty of construction, the reparation duration shortens greatly;
Three, the buying of high strength ceramics wear-resistant material is convenient, and fabrication cycle is short, and the shelf-time is long, and cost performance is higher, and maintenance construction is simple, easily controls repairing quality during operative;
Four, the demoulding is simple, only the screw rod be connected with pipeline or platform support need be screwed out, automatic demoulding when arc can lead to hot blast by pipeline on pipeline rehabilitation mould;
Five, solving blast-furnace hot-air pipeline makes its key brick insufficient strength cause the bottleneck problem of subsiding because use temperature is too high, general produce in occur hot air duct subside problem time all can adopt and make repairing mould and the method utilizing high strength ceramics wear-resistant material to build is dealt with in time;
Six, adopt high strength ceramics wear-resistant material to carry out cast and repair hot air duct dome portions, ensure that the safe reliability of hotblast stove when high wind-warm syndrome operation, quality, vault intensity are all than good many times of the method for again building by laying bricks or stones by original pipeline vault construction, after repairing, pipeline strength ensures all to some extent, and can not again subside after pouring into entirety, hot blast no longer includes chance and channels to metal pipe-wall thus damage it;
Seven, high strength ceramics wear-resistant material is adopted to carry out pouring into a mould the method for repairing hot air duct dome portions, not only in case of emergency particularly suitable, also according to said method can carry out repair during conventional maintenance, the hot air duct of normal production is from now on provided safeguard in generation hot blast furnace life is normally run.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is former hot air furnace hot air cross-section of pipeline structural representation.
Fig. 2 is the cross-sectional structure schematic diagram after former hot air furnace hot air pipeline rehabilitation.
Fig. 3 is the cross-sectional structure schematic diagram of the optimum embodiment of repair structure of iron-making heat wind furnace hot air duct of the present utility model.
Fig. 4 is the partial enlarged drawing at A place in Fig. 3.
Fig. 5 is the structural representation of repairing mould of the present utility model.
Fig. 6 is the two dimensional structure schematic diagram of arc in repairing mould of the present utility model.
Fig. 7 is the two dimensional structure schematic diagram of repair structure housing of the present utility model.
In figure 1, metal pipe-wall, 2, shell, 3, pouring layer, 4, arc, 5, screw rod, 6, open holes, 7, cell body is installed, 8, service sleeve, 9, light-weight insulating brick, 10, heavy pipeline brick, 11, hot-air channel, 12, heat insulating casting material, 13, metal pipe-wall weld, 14, the heavy pipeline brick of again building by laying bricks or stones, 15, the light-weight insulating brick of again building by laying bricks or stones, 16, the heat insulating casting material of tube wall is repaired, 17, the metal pipe-wall repaired, 18, repair to build by laying bricks or stones and use mould.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
As shown in Fig. 3, Fig. 4, Fig. 7, the repair structure of a kind of iron-making heat wind furnace hot air duct of the present utility model, described hot air duct has metal pipe-wall 1, comprise shell 1 and pouring layer 3, described shell 1 welds with metal pipe-wall 1, and described pouring layer 3 is the high strength ceramics wear-resistant material TCJ-1 that good luck auspicious company limited in Gongyi City of Henan Province produces.
As shown in Figure 5, Figure 6, the repairing mould of a kind of repair structure for described iron-making heat wind furnace hot air duct of the present utility model, comprise arc 4 and screw rod 5, described arc 4 is curved plate.Described arc 4 offers open holes 6, described open holes 6 internal fixtion has installs cell body 7, the outside surface of described installation cell body 7 welds with described open holes 6, in described installation cell body 7, there is internal thread, described screw rod 5 one end has outside screw, and the outside screw of described screw rod 5 is threaded mutually with the internal thread installing cell body 7.Service sleeve 8 is arranged with outside described screw rod 5.
Described arc 4 is arc line shaped along the cross section of hot air duct radial direction, and on arc 4, submarginal position offers four uniform open holess 6, and each open holes 6 internal thread connects a screw rod 5.Described arc 4 central angle right along the cross section of hot air duct radial direction is 120 °.
Adopt diverse ways to the hot air duct because of life-time service subside damage part repair, according to the situation that hot air duct damages, one is repair according to original pipeline configuration, but hot air duct insulating brick originally designed originally only has one deck, outside heat insulation pouring layer is also because insulating brick is to the fine and close not and damage of leaking out of building by laying bricks or stones of internal pipeline heavy brick, cause the thermo-field thoery of pipeline external surface and cannot normally use, the work-ing life that also cannot ensure from now on according to original restorative procedure.Just directly repeatedly be in the milk with hotblast stove and the special grouting material of hot air duct when maintenance at ordinary times or repairing, pipeline external surface is also riddled with gaping wounds, but effect is also undesirable.The second is, adopt high strength ceramics wear-resistant material, the cast work on top, collapsible tube road is carried out after making the repairing mould in the present embodiment, substitute the function of original all pipeline bricks, the heat insulating casting material 12 being close to metal pipe-wall 1 is also no longer used, to be castly just not pour into a mould after being adjacent to the steel plate that will repair, finally repaired in the bending arc Plate Welding subsidy of the damaged part of appearance metal pipe-wall.
Suppose that repair place is the hot air duct about about 100 meters altogether of DN2000, add the trident arm more than totally 20 meter of three sections of DN1800, the high strength ceramics wear-resistant material unit price adopted is 15,000 yuan one ton, and the pipe-repairing thickness of resistance to material needs more than 400mm, shares about more than 100 ton.After making hot air duct repairing mould, whole reparation operation element simply, conveniently, and repairing economic worth is very high, repairs to use just to no longer include the too high phenomenon appearance of pipeline top surface temperature.
Adopt high strength ceramics wear-resistant material, make hot air duct repairing mould, for the top damaged location of blast funnace hot blast stove hot air duct, also can subside after preventing cast, the pipeline brick that conduit upper accounts for overall 1/3rd all can be pulled down, carried out integrated poured work.Carry out filling up reparation so adopt hot air duct repairing mould to pour into a mould high strength ceramics wear-resistant material in addition, result of use is better.
Suppose that mending option is for φ 1984mm hot-blast main deferent about 100 meters, add and also need more than 100 ton by three sections of arm φ 1884mm.If add the repairing way of mud with refractory brick, want more than 100 ton equally, cost is not little.But, the sequela produced when the method adopting high strength ceramics wear-resistant material to carry out pouring into a mould can be avoided building by laying bricks or stones, and the hot air duct bottom die utilized is also simple and convenient.Avoid after original general constructional method reparation because producing smooth danger of collapsing during life-time service high-temperature hot-air.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on specification sheets, must determine its technical scope according to right.
Claims (7)
1. the repair structure of an iron-making heat wind furnace hot air duct, described hot air duct has metal pipe-wall (1), it is characterized in that: comprise shell (1) and pouring layer (3), described shell (1) welds with metal pipe-wall (1), and described pouring layer (3) is high strength ceramics wear-resistant material.
2. the repair structure of iron-making heat wind furnace hot air duct as claimed in claim 1, is characterized in that: described high strength ceramics wear-resistant material is high strength ceramics wear-resistant material TCJ-1.
3. the repairing mould for the repair structure of the iron-making heat wind furnace hot air duct such as according to any one of claim 1-2, it is characterized in that: comprise arc (4) and screw rod (5), described arc (4) offers open holes (6), described open holes (6) internal fixtion has installation cell body (7), the outside surface of described installation cell body (7) welds with described open holes (6), in described installation cell body (7), there is internal thread, described screw rod (5) one end has outside screw, the outside screw of described screw rod (5) is threaded mutually with the internal thread installing cell body (7).
4. repairing mould as claimed in claim 3, is characterized in that: be arranged with service sleeve (8) outside described screw rod (5).
5. repairing mould as claimed in claim 3, it is characterized in that: described arc (4) is arc line shaped along the cross section of hot air duct radial direction, the upper submarginal position of arc (4) offers four uniform open holess (6), and each open holes (6) internal thread connects a screw rod (5).
6. repairing mould as claimed in claim 5, is characterized in that: described arc (4) central angle right along the cross section of hot air duct radial direction is 120 °.
7. repairing mould as claimed in claim 3, is characterized in that: described arc (4) is curved plate.
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| CN201420687643.3U CN204174222U (en) | 2014-11-17 | 2014-11-17 | The repair structure of iron-making heat wind furnace hot air duct and repairing mould thereof |
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| CN201420687643.3U CN204174222U (en) | 2014-11-17 | 2014-11-17 | The repair structure of iron-making heat wind furnace hot air duct and repairing mould thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018664A (en) * | 2015-08-13 | 2015-11-04 | 广东韶钢松山股份有限公司 | Rapid repairing technology of blast furnace hot blast stove pipeline |
| CN105483307A (en) * | 2015-12-07 | 2016-04-13 | 北京首钢股份有限公司 | Repairing method for flow guiding bars in combustor during hot blast heater repairing |
| CN106949337A (en) * | 2017-03-30 | 2017-07-14 | 中国十九冶集团有限公司 | A kind of hot air duct collapses the restorative procedure of liner |
| CN108798674A (en) * | 2018-06-19 | 2018-11-13 | 方晓妹 | Power shovel endoporus is worn the repair apparatus of branch wheel |
| CN110345772A (en) * | 2019-06-06 | 2019-10-18 | 国家电投集团黄河上游水电开发有限责任公司 | A kind of high-temperature flue is quickly met an urgent need method for repairing and mending |
| CN111321268A (en) * | 2020-03-16 | 2020-06-23 | 中天钢铁集团有限公司 | Method for finding circle center at converter building bottom |
| CN111349735A (en) * | 2018-12-21 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Method for treating air leakage and redness of air mixing three-way pipeline of blast furnace hot blast stove |
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2014
- 2014-11-17 CN CN201420687643.3U patent/CN204174222U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018664A (en) * | 2015-08-13 | 2015-11-04 | 广东韶钢松山股份有限公司 | Rapid repairing technology of blast furnace hot blast stove pipeline |
| CN105018664B (en) * | 2015-08-13 | 2017-06-16 | 广东韶钢松山股份有限公司 | A kind of blast funnace hot blast stove pipeline technique for rapidly repairing |
| CN105483307A (en) * | 2015-12-07 | 2016-04-13 | 北京首钢股份有限公司 | Repairing method for flow guiding bars in combustor during hot blast heater repairing |
| CN105483307B (en) * | 2015-12-07 | 2017-10-03 | 北京首钢股份有限公司 | Burner Inner guide rod restorative procedure in a kind of hot-blast stove repairing |
| CN106949337A (en) * | 2017-03-30 | 2017-07-14 | 中国十九冶集团有限公司 | A kind of hot air duct collapses the restorative procedure of liner |
| CN108798674A (en) * | 2018-06-19 | 2018-11-13 | 方晓妹 | Power shovel endoporus is worn the repair apparatus of branch wheel |
| CN111349735A (en) * | 2018-12-21 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Method for treating air leakage and redness of air mixing three-way pipeline of blast furnace hot blast stove |
| CN110345772A (en) * | 2019-06-06 | 2019-10-18 | 国家电投集团黄河上游水电开发有限责任公司 | A kind of high-temperature flue is quickly met an urgent need method for repairing and mending |
| CN111321268A (en) * | 2020-03-16 | 2020-06-23 | 中天钢铁集团有限公司 | Method for finding circle center at converter building bottom |
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