CN100575307C - Repairing material for shaft furnace lining and utilization thereof - Google Patents
Repairing material for shaft furnace lining and utilization thereof Download PDFInfo
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- CN100575307C CN100575307C CN200610054559A CN200610054559A CN100575307C CN 100575307 C CN100575307 C CN 100575307C CN 200610054559 A CN200610054559 A CN 200610054559A CN 200610054559 A CN200610054559 A CN 200610054559A CN 100575307 C CN100575307 C CN 100575307C
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- shaft furnace
- solidifying agent
- clay
- steel fiber
- repair
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Abstract
The invention discloses a kind of repairing material for shaft furnace lining, it is characterized in that: its constituent materials is high-al clay, steel fiber, solidifying agent and high-temperature agglomerant, and the weight percent of each constituent materials is, high-al clay 40%-68%, steel fiber 0.5%-4%, solidifying agent 4%-12%, high-temperature agglomerant 6%-30%; A plurality of reinforced holes are set on the shaft furnace body of heater, stiffener is set in reinforced hole, stiffener links to each other with the reinforcing bar mould and is connected into an integral body; Annotate patching material at shaft furnace body of heater top-pour, form the repair material pour mass.This repairing inner liner material, high temperature resistant, can bear 1700 ℃ of high temperature, and the coefficient of expansion and blast furnace high aluminium brick match, can keep enough intensity during heat.Have explosion-proof and the rapid drying function; After being used to repair shaft furnace lining, safe in utilization, the duration shortens greatly.Adopt this kind repair mode and patching material, less investment, instant effect, life cycle is long.
Description
Technical field
The present invention relates to the pellet roasting shaft furnace lining in a kind of ferrous metal smelting equipment, the patching material after especially shaft furnace lining damages and the application of this kind material.
Background technology
Shaft furnace is to be used for the metal melting equipment of roasting pelletizing, has characteristics such as simple in structure, less investment, thermo-efficiency height; Its working process is: at first process drying and dehydrating, preheating oxidation in shaft furnace top oven dry bed of green-ball, enter the roasting band then, and at high temperature take place fixed; Through the soaking zone, finish whole consolidation processes then; Fixed good pelletizing and bottom blast the intravital cooling air of stove and carry out heat exchange and obtain cooling; Cooled finished pellet is discharged from furnace bottom.The shaft furnace lining material all is a refractory brick, its major ingredient is the blast furnace high aluminium brick, in the pellet formation process, because frequent start-stop stove and operation is improper, time is long slightly, often adhere to some bigger ferriferous oxides in its furnace wall, influence the direct motion of furnace charge, operator are forced to disclose material with drill rod to furnace wall, thereby cause refractory materials (brick body), the coming off in a large number and rupture of inner lining material, as a result, fire channel one band broadens, and a large amount of flame is directly scurried drying bed along furnace wall, badly influence the roasting of pelletizing, warm finally makes the pellet quality variation, the rising of returning mine.
The influence that furnace wall after the breakage, liner, fire channel cause production mainly contains two aspects: the one, and pellet can stop up fire channel and mixing section, and the hot waste gas of combustion chamber can be a greater impact when mixing section enters the shaft roasting band; The 2nd, fire channel upper edge fracture place has occurred can causing the big area of furnace wall to run wind and rise to fire door behind the more brickwork joint, reach 45% at least according to its air leak rate of air curtain of measuring and calculating, and a normal shaft furnace air leak rate of air curtain can not surpass 15%, has had a strong impact on the shaft furnace operation.Simultaneously, if do not deal with, whole furnace wall can produce bigger potential safety hazard.
Furnace wall after the breakage, liner, fire channel are transformed, the present following dual mode of domestic common employing: one, the reforming mode of integral replacing fire channel heterotypic fire brick, but the precondition one of this mode is that the sufficient repair time will be arranged, the 2nd, it is special that the fire channel special shaped brick is installed, change, must remove its top high special-shaped blast furnace high aluminium brick more than three meters, consumed time is long, the expense height that drops into, this substitute mode is inadvisable.Two, have the colleague to adopt the moulding of refractory materials one-piece casting, but because of pouring material and blast furnace high aluminium brick can't in conjunction with, cause coming off, because common refractory can't bear the high temperature of interior 1400 ℃ of stove unusual expansion appears simultaneously, furnace wall occurs than large fracture, furnace shell crimp, and it is serious that shaft furnace runs wind.
Summary of the invention
The present invention is directed to the existing mode that shaft furnace lining, fire channel are transformed, the deficiency of raw material, the patching material that provides a kind of high temperature resistant, coefficient of expansion and blast furnace high aluminium brick to match.
Technical scheme of the present invention: a kind of repairing material for shaft furnace lining, it is characterized in that: its constituent materials is high-al clay, steel fiber, solidifying agent and high-temperature agglomerant, the weight percent of each constituent materials is, high-al clay 40%-68%, steel fiber 0.5%-4%, solidifying agent 4%-12%, high-temperature agglomerant 6%-30%.
The optimization proportioning of each constituent materials is: high-al clay 50%-62%, steel fiber 1%-3%, solidifying agent 5%-10%, high-temperature agglomerant 10%-28%.
Repairing material for shaft furnace lining of the present invention with respect to prior art, has following characteristics:
1, high temperature resistant, can bear 1700 ℃ of high temperature, and the coefficient of expansion and blast furnace high aluminium brick match, can keep enough intensity during heat.
2, have explosion-proof and the rapid drying function; After being used to repair shaft furnace lining, safe in utilization, the duration shortens greatly.
3, adopt this kind repair mode and patching material, less investment, instant effect, life cycle is long.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing
Accompanying drawing is the structure diagram that adopts after patching material of the present invention is repaired;
Embodiment
Patching material of the present invention is made up of following constituent materials, high-al clay, steel fiber, solidifying agent and high-temperature agglomerant, the weight percent of each component is as follows, high-al clay 40%-68%, steel fiber 0.5%-4%, solidifying agent 4%-12%, high-temperature agglomerant 6%-30%; High-al clay wherein is existing a kind of refractory materials, is rich in AL
2O
3, AL wherein
2O
3Content is generally greater than 50%; Steel fiber is with the tiny steel wire of diameter, is the steel wire of 0.5-1.2mm as diameter, blocks to be the segment about 0.5-2cm; Solidifying agent is to adopt existing high temperature resistant solidifying agent, as the I-T solidifying agent that can buy on the market etc., plays curing therein, shortens its setting time, increases the effect of its intensity; High-temperature agglomerant is to adopt existing resistant to elevated temperatures binding agent, and main component is the vegetable acid of hydroxyl, plays the effect that various components is bonded together, shortens its setting time therein.
It optimizes proportioning: high-al clay 50%-62%, steel fiber 1%-3%, solidifying agent 5%-10%, high-temperature agglomerant 10%-28%.
Measure according to actual needs, take by weighing the weight of above-mentioned each component in proportion, mix, stir, with its be poured into treated, remove in the burner hearth of damaged furnace lining materials such as high alumina brick, its original size of burner hearth of strict guarantee, size etc. during cast, maintain for some time (more than ten hour) back demoulding again, rebake (infrared rays light).The novel refractory that shaft furnace of the present invention is built, this material not only can anti-1700 ℃ of high temperature, and the coefficient of expansion and shaft furnace high alumina brick match, and have explosion-proof simultaneously and the rapid drying function.
Embodiment one: take by weighing 6 kilograms of high-al clays, account for 60%, 0.3 kilogram of steel fiber accounts for 3%, and 1 kilogram in solidifying agent accounts for 10%, and 2.7 kilograms of high-temperature agglomerants account for 27%; Said components is mixed, stirred, just can be used as patching material, be cast in the shaft furnace burner hearth.
Embodiment two: take by weighing 6.8 kilograms of high-al clays, account for 68%, 0.25 kilogram of steel fiber accounts for 2.5%, and 0.8 kilogram in solidifying agent accounts for 8%, and 2.15 kilograms of high-temperature agglomerants account for 21.5%; Said components is mixed, stirred, just can be used as patching material, be cast in the shaft furnace burner hearth.
Adopt this repair mode of the present invention, less investment, instant effect, life cycle is long, and at present domestic only have heavy steel shaft furnace fire door successfully to be retrofited, and has higher promotional value.
As shown in Figure 1,1-shaft furnace body of heater, 2-repair material pour mass, 3-reinforcing bar mould, 4-reinforced hole, 5-stiffener;
Accompanying drawing is depicted as the shaft furnace structure diagram that adopts after patching material is repaired;
Remove fire channel top high alumina brick, the loosening part of inner lining damage in strict accordance with construction requirement after, a plurality of reinforced holes 4 are set on shaft furnace body of heater 1, stiffener 5 is set in reinforced hole 4, and stiffener 5 links to each other with reinforcing bar mould 3 and is connected into an integral body, plays the effect of gaining in strength with rigidity; In strict accordance with construction requirement, the cast said components is mixed the patching material that obtains on shaft furnace body of heater 1, forms repair material pour mass 2; Generally build 200-250mm, the internal control size of repair material pour mass 2 must meet former type of furnace internal control size, and tolerance of dimension is controlled within the scope of processing requirement.The demoulding after maintenance for some time (more than ten hour), rebake (infrared rays light) obtains higher, the resistant to elevated temperatures repair material pour mass 2 of intensity, makes damaged shaft furnace body of heater 1 obtain repairing, and can normally put into production.
Claims (2)
1, a kind of repairing material for shaft furnace lining, it is characterized in that: its constituent materials is high-al clay, steel fiber, solidifying agent and high-temperature agglomerant, the weight percent of each constituent materials is, high-al clay 60%-68%, steel fiber 0.5%-1.0%, solidifying agent 4%-12%, high-temperature agglomerant 21.5%-30%.
2, a kind of shaft furnace structure of using after the described repairing material for shaft furnace lining of claim 1 is repaired, comprise shaft furnace body of heater (1), it is characterized in that: a plurality of reinforced holes (4) are set on shaft furnace body of heater (1), stiffener (5) is set in reinforced hole (4), and stiffener (5) links to each other with reinforcing bar mould (3) and is connected into an integral body; Go up the cast patching material at shaft furnace body of heater (1), form repair material pour mass (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610054559A CN100575307C (en) | 2006-10-31 | 2006-10-31 | Repairing material for shaft furnace lining and utilization thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610054559A CN100575307C (en) | 2006-10-31 | 2006-10-31 | Repairing material for shaft furnace lining and utilization thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1944344A CN1944344A (en) | 2007-04-11 |
| CN100575307C true CN100575307C (en) | 2009-12-30 |
Family
ID=38044022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610054559A Expired - Fee Related CN100575307C (en) | 2006-10-31 | 2006-10-31 | Repairing material for shaft furnace lining and utilization thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN100575307C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219904B (en) * | 2008-01-14 | 2010-11-24 | 濮阳濮耐高温材料（集团）股份有限公司 | Hot patching mending material and hot patching pressing in method |
| CN101381606B (en) * | 2008-09-27 | 2011-12-28 | 莱芜钢铁股份有限公司 | High-alumina coke oven fed batch |
| CN101708993B (en) * | 2008-10-31 | 2012-05-23 | 鞍钢集团矿业公司 | Repairing method of rotary kiln liner fireproof material |
| CN102233319B (en) * | 2010-04-22 | 2013-10-16 | 重庆钢铁(集团)有限责任公司 | Ignition furnace strengthening and spraying process |
| US20130022471A1 (en) * | 2011-07-22 | 2013-01-24 | General Electric Company | Methods for repairing a turbine airfoil constructed from cmc material |
| CN110953876A (en) * | 2019-12-18 | 2020-04-03 | 攀钢集团工程技术有限公司 | Method for repairing vertical kiln refractory layer |
| CN115648388B (en) * | 2022-12-29 | 2023-03-31 | 北京联合荣大工程材料股份有限公司 | Pumping pouring method of high-steel fiber castable |
-
2006
- 2006-10-31 CN CN200610054559A patent/CN100575307C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1944344A (en) | 2007-04-11 |
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Granted publication date: 20091230 Termination date: 20121031 |