CN103449831B - A kind of method of coke oven soldering material and repairing coke oven - Google Patents
A kind of method of coke oven soldering material and repairing coke oven Download PDFInfo
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- CN103449831B CN103449831B CN201310385576.XA CN201310385576A CN103449831B CN 103449831 B CN103449831 B CN 103449831B CN 201310385576 A CN201310385576 A CN 201310385576A CN 103449831 B CN103449831 B CN 103449831B
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- soldering material
- coke oven
- granularity
- soldering
- flyash
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Abstract
The invention provides a kind of method of coke oven soldering material and repairing coke oven.The Ni lead-free solder alloy of described soldering material by 1 ~ 3% metallic aluminium powder, 5 ~ 8% metallic silicon power, the mineralizer of 2 ~ 5%, the silicon ash of 65 ~ 85% or silica flour and 10 ~ 20% quartz sand form.Described method comprises and described coke oven soldering material is sprayed to high temperature furnace wall brick to be repaired surface with oxygen rich gas and oxidation reaction occurs, and makes soldering material be partially molten state and then sticks to furnace wall brick to be repaired on the surface, forming ceramic repair layer.The present invention adopts the secondary resources such as flyash, silicon ash as raw material, achieves the high-efficiency comprehensive utilization of secondary resource, and reduces the production cost of soldering material; Adding metallic aluminium and metallic silicon in addition, realize spontaneous heating sintering, avoiding when adopting soldering material of the present invention to carry out fettling adopting high temperature and high pressure gas; Dioxide-containing silica in the soldering material of the application, more than 90%, belongs to high siliceous soldering material, effective for the breakage of soldering coke oven silica brick.
Description
Technical field
The present invention relates to technical field of refractory materials, more particularly, relate to the ceramic welding material that a kind of coke oven silica brick is repaired and the method adopting soldering material of the present invention repairing coke oven.
Background technology
Coke oven is the thermal kiln furnace be built into by refractory brick, in use can cause the damage of coke oven furnace wall due to a variety of causes.In order to improve the service life of coke oven, need to repair it.
Coke oven soldering comprises wet method and repairs and coke oven flame welding repair, and the former fettling is simple to operate, and maintenance cost is low, but reduces furnace wall surface temperature during fettling, and a bridging time is short, and severe operational environment, is eliminated gradually.Coke oven flame welding repair utilizes thermal-flame by soldering refractory powder and furnace wall refractory brick heating and melting, and make refractory powder adhere to the furnace wall surface of damage for physically, to repair damaged metope, usually be fuel with acetylene, with oxygen as combustion-supporting gas, namely need to adopt high temperature and high pressure gas in the process of repairing, in addition, rarely have the report about soldering material component at present.
Summary of the invention
For the deficiencies in the prior art, an object of the present invention is to solve in above-mentioned prior art the one or more problems existed.
An object of the present invention is provide the high siliceous soldering material of a kind of coke oven spontaneous heating and adopt this soldering material to repair the method for coke oven.
To achieve these goals, an aspect of of the present present invention Ni lead-free solder alloy of providing soldering material described in a kind of coke oven soldering material by 1 ~ 3% metallic aluminium powder, 5 ~ 8% metallic silicon power, the mineralizer of 2 ~ 5%, the silicon ash of 65 ~ 85% or silica flour and 10 ~ 20% quartz sand form.
According to an embodiment of coke oven soldering material of the present invention, the granularity of described metallic aluminium powder is to pass through 150 mesh sieves, and wherein metal aluminum content is at more than 98wt%.
According to an embodiment of coke oven soldering material of the present invention, the granularity of described metallic silicon power is to pass through 200 mesh sieves, and wherein metallic silicon content is at more than 99wt%.
According to an embodiment of coke oven soldering material of the present invention, described mineralizer is flyash, and the granularity of described flyash is to pass through 200 mesh sieves, contains by weight percentage: SiO in flyash
2: 60 ~ 65, Al
2o
3: 25 ~ 32%, CaO:1 ~ 3%.
According to an embodiment of coke oven soldering material of the present invention, the granularity of described silicon ash is to pass through 200 mesh sieves, SiO in described silicon ash
2>=97wt%.
According to an embodiment of coke oven soldering material of the present invention, the granularity of described silica flour is to pass through 200 mesh sieves, SiO in described silica flour
2>=95wt%.
According to an embodiment of coke oven soldering material of the present invention, the granularity of described quartz sand is 0.088 ~ 0.2mm, SiO in described quartz sand
2>=95wt%.
Another aspect provides a kind of method of repairing coke oven.Described method comprises and described soldering material is sprayed to high temperature furnace wall brick to be repaired surface with oxygen rich gas and oxidation reaction occurs, and makes soldering material be partially molten state and then sticks to furnace wall brick to be repaired on the surface, forming ceramic repair layer.
According to an embodiment of the method for repairing coke oven of the present invention, described oxygen rich gas is that air and oxygen mix according to the volume ratio of 1:5 ~ 1:8.
According to an embodiment of the method for repairing coke oven of the present invention, described high temperature furnace wall brick surface temperature to be repaired is more than 700 DEG C.
Compared with prior art, beneficial effect of the present invention comprises: the present invention adopts the secondary resources such as flyash, silicon ash as raw material, achieves the high-efficiency comprehensive utilization of secondary resource, and reduces the production cost of soldering material; Adding metallic aluminium and metallic silicon in addition, realize spontaneous heating sintering, avoiding when adopting soldering material of the present invention to carry out fettling adopting high temperature and high pressure gas; Dioxide-containing silica in the soldering material of the application, more than 90%, belongs to high siliceous soldering material, effective for the breakage of soldering coke oven silica brick, and has good environmental benefit and social benefit.
Detailed description of the invention
Hereinafter, will describe in detail in conjunction with exemplary embodiment according to coke oven soldering material of the present invention and the method for repairing coke oven.In the present invention, if do not have the statement made an exception, then in the material usually mentioned, the content of each element or composition is all weight percentage (representing with " wt% ").
Coke oven soldering material according to an exemplary embodiment of the present invention, with weight percentage by 1 ~ 3% metallic aluminium powder, 5 ~ 8% metallic silicon power, 2 ~ 5% flyash, 65 ~ 85% silicon ash and 10 ~ 20% quartz sands form.
Wherein, the granularity of the metallic aluminium powder used (namely can pass through 150 mesh sieves) below 150 orders, and wherein metal aluminum content is at more than 98wt%.The granularity of metallic silicon power (namely can pass through 200 mesh sieves) below 200 orders, and wherein metallic silicon content is at more than 99wt%.In this application, to the requirement of flyash be: granularity, below 200 orders, wherein contains SiO
2: 60 ~ 65wt%, Al
2o
3: 25 ~ 32wt%, CaO:1 ~ 3wt%.Silicon ash be silicon powder again, be also SILICA FUME or silicon dioxide ultrafine powder, be generally referred to as silicon ash.Silicon ash is the SiO produced when smelting ferrosilicon and industrial silicon
2with the oxygen rapid oxidation in Si gas and air and condensation and the ultra-fine siliceous powder body material of one formed.The present invention to the requirement of silicon ash is: granularity below 200 orders, SiO in silicon ash
2>=97wt%.The granularity of quartz sand is 0.088 ~ 0.2mm, SiO in quartz sand
2>=95wt%.
Soldering material of the present invention is made up of exothermic mixture, mineralizer, refractory matter three part.Exothermic mixture adopts the mixture of metallic aluminium powder and metallic silicon power, aluminium powder heat generation is good, if but aluminium powder consumption is too high, after oxidation can with silicon dioxde reaction, form mullite phase, affect the performance of soldering layer, metallic silicon power heating effect is poor compared with aluminium powder, if but suitably use, the deficiency of exothermic mixture heating can be made up, and after metallic silicon power oxidation, material is silica, the performance of soldering layer can be improved, if use other exothermic mixture, caloric value is not high, and affects the quality of high siliceous material.
In the present embodiment, mineralizer adopts flyash, is sial system material, fusing point 1350 ~ 1410 DEG C, meets the bond vitrified of soldering material under siliceous soldering material spray repair condition, forms combination.Such as, but the present invention is not limited thereto, flyash can adopt other alternative materials, and calcium silicates is equal, but preferred powder coal ash, use flyash both environmental protection, mineralising performance is good again.
Refractory matter quartz sand mainly plays fire-resistant skeleton function, and certain granularity ensure that the smooth delivery of power of material and the compactness of soldering layer.Silicon ash main component is silica, primary structure is quartz silica and a small amount of indefinite form body, refractoriness is greater than 1620 DEG C, main and quartz sand is arranged in pairs or groups and is played fire-resistant skeleton function, and silicon ash itself has a small amount of indefinite form silica, for low melting point, mineralizer effect can be played, improve the adhesiving effect of soldering material.Silicon ash can adopt the silica flour of below 200 orders to substitute, SiO in silica flour
2>=95wt%.Here preferably use the both environmental protection of silicon ash, the soldering performance of soldering material can be improved again.
In the present embodiment, soldering material is made up of the metallic silicon power of the metallic aluminium powder of 1 ~ 3wt%, 5 ~ 8wt%, the flyash of 2 ~ 5wt%, the silicon ash of 65 ~ 85wt% and 10 ~ 20wt% quartz sand.The reason of proportioning selection within the scope of said ratio of each component is: if metallic aluminium powder content is too low or do not adopt metallic aluminium powder, the spontaneous heating effect of soldering material is undesirable, spraying temperature cannot be guaranteed, if the consumption of metallic aluminium powder is too large, then easily affects the quality of soldering layer; Metallic silicon power can use as exothermic mixture by Substitute For Partial metallic aluminium powder, and after oxidation, formation does not affect the silica of soldering layer quality, if but use amount is too high, and can cause oxidation not exclusively, finally also can affect the quality of soldering material.Flyash is mineralizer, and addition is that 2 ~ 5wt% is more suitable, does not have mineralizer effect very little, affects fire resistance and the adhesion property of soldering material too much.The quartz sand of certain particle size and the silicon ash collocation of fine-powdered use as refractory powder, and quartz sand consumption can not be too large, otherwise affect the compactness of material transportation performance and soldering material.
Select to be described in detail to the particle size range of each component of soldering material below.Metallic aluminium powder is below 150 orders, and metallic silicon power is below 200 orders, ensures that exothermic mixture generates heat as far as possible under high-temperature oxygen-enriched atmosphere oxidation in spraying process, avoids that heat generating agent particulate is excessive causes oxidation incomplete, affects the performance of soldering layer.Flyash adopts three grades of flyash, below granularity 200 order, ensures that flyash is dispersed in material, timely generation liquid phase, coherent refractory aggregate, below silicon ash granularity 200 order, arranges in pairs or groups with the quartz sand of 0.088 ~ 0.2mm and uses, can ensure that material does not occur putty situation in course of conveying, and improve the adhesion property of soldering material, and ensure that soldering layer has higher compactness, quartz sand particle can not be too large, otherwise in material conveying process, easily there is segregation, cause material uneven.
The compound method of this soldering material is: by the metallic aluminium powder of 1 ~ 3wt%, the metallic silicon power of 5 ~ 8wt%, the flyash of 2 ~ 5wt%, and form soldering material after the silicon ash of 65 ~ 85wt% and the quartz sand mixing of 10 ~ 20wt%, this soldering material needs sealed storage.
When adopting soldering material of the present invention to carry out coke oven, its concrete construction technology is: soldering material is loaded ceramic welding-repairing machine feed bin, pumped (conveying) medium is oxygen rich gas, the i.e. mixture of air and oxygen, wherein both volume ratios are air: oxygen=1:5 ~ 1:8, spray gun is stretched in the coke oven of more than 700 DEG C, shower nozzle aims at the position needing to repair, open welding repair machine, at high temperature there is oxidation reaction in soldering material and oxygen rich gas, make soldering material be that partially molten state sticks to silica brick surface, form ceramic repair layer.
When soldering material of the present invention being sprayed under oxygen-enriched atmosphere the coke oven silica brick surface of more than 700 DEG C, due to high temperature action own in coke oven, exothermic mixture in soldering material is oxidized heating under oxygen-enriched atmosphere, flame temperature is made to reach 1400 ~ 1550 DEG C, exothermic mixture metallic aluminium is oxidized to aluminium oxide, metallic silicon power is oxidized to silica, under 1400 ~ 1550 DEG C of spraying temperatures, mineralizer in soldering material (low melting point in flyash and silicon ash) forms melting behaviors, by quartz sand, refractory powder in silicon ash sticks into one, fine and close ceramic body is formed after cooling, kiln service life can be extended.
The soldering material that the application relates to adopts exothermic mixture, mineralizer, refractory powder to arrange in pairs or groups mutually, and wherein comparatively carefully, the spontaneous good in thermal property of exothermic mixture, ensure that soldering material bridging rate is high, base densities, compressive resistance is high for mineralizer and silicon ash granularity.
In order to understand above-mentioned exemplary embodiment of the present invention better, below in conjunction with concrete example, it is further described.
In example 1 ~ 5, make five assembly welding feed supplements according to the mix proportion scheme in table 1, and compare the performance indications of each assembly welding feed supplement, result is as shown in table 2, can find out, the performance indications of five assembly welding feed supplements are all better, meet production requirement.
Table 1 mix proportion scheme
Table 2 performance indications
In sum, the present invention adopts the secondary resources such as flyash, silicon ash as raw material, achieves the high-efficiency comprehensive utilization of secondary resource, and reduces the production cost of soldering material, its cost is no more than 5000 yuan/ton, far below the commodity ceramic welding material (unit price 3.5 ten thousand yuan/ton) on market; Adding metallic aluminium and metallic silicon in addition, realize spontaneous heating sintering, avoiding when adopting soldering material of the present invention to carry out fettling adopting high temperature and high pressure gas; Dioxide-containing silica in the soldering material of the application, more than 90%, belongs to high siliceous soldering material, effective for the breakage of soldering coke oven silica brick, and has good environmental benefit and social benefit.
Although above by describing the present invention in conjunction with exemplary embodiment, it will be apparent to those skilled in the art that when not departing from the spirit and scope that claim limits, various amendment and change can be carried out to exemplary embodiment of the present invention.
Claims (10)
1. a coke oven soldering material, it is characterized in that, the Ni lead-free solder alloy of described soldering material by 1 ~ 3% metallic aluminium powder, 5 ~ 7% metallic silicon power, the mineralizer of 2 ~ 5%, the silicon ash of 65 ~ 85% or silica flour and 10 ~ 20% quartz sand form, wherein, described mineralizer is flyash, and described flyash is meeting the bond vitrified that realizes soldering material under soldering material spray repair condition and is making soldering material form combination, and the low melting point in described silicon ash also plays the effect of mineralizer.
2. coke oven soldering material according to claim 1, is characterized in that, the granularity of described metallic aluminium powder is to pass through 150 mesh sieves, and wherein metal aluminum content is at more than 98wt%.
3. coke oven soldering material according to claim 1, is characterized in that, the granularity of described metallic silicon power is to pass through 200 mesh sieves, and wherein metallic silicon content is at more than 99wt%.
4. coke oven soldering material according to claim 1, is characterized in that, the granularity of described flyash is to pass through 200 mesh sieves, contains by weight percentage: SiO in flyash
2: 60 ~ 65%, Al
2o
3: 25 ~ 32%, CaO:1 ~ 3%.
5. coke oven soldering material according to claim 1, is characterized in that, the granularity of described silicon ash is to pass through 200 mesh sieves, SiO in described silicon ash
2>=97wt%.
6. coke oven soldering material according to claim 1, is characterized in that, the granularity of described silica flour is to pass through 200 mesh sieves, SiO in described silica flour
2>=95wt%.
7. coke oven soldering material according to claim 1, is characterized in that, the granularity of described quartz sand is 0.088 ~ 0.2mm, SiO in described quartz sand
2>=95wt%.
8. repair the method for coke oven for one kind, it is characterized in that, described method comprises and coke oven soldering material as claimed in any of claims 1 to 7 in one of claims is sprayed to high temperature furnace wall brick to be repaired surface with oxygen rich gas and oxidation reaction occurs, make soldering material be partially molten state and then stick to furnace wall brick to be repaired on the surface, forming ceramic repair layer.
9. the method for repairing coke oven according to claim 8, is characterized in that, described oxygen rich gas is that air and oxygen mix according to the volume ratio of 1:5 ~ 1:8.
10. the method for repairing coke oven according to claim 8, is characterized in that, described high temperature furnace wall brick surface temperature to be repaired is more than 700 DEG C.
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| CN201310385576.XA CN103449831B (en) | 2013-08-29 | 2013-08-29 | A kind of method of coke oven soldering material and repairing coke oven |
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| CN201310385576.XA CN103449831B (en) | 2013-08-29 | 2013-08-29 | A kind of method of coke oven soldering material and repairing coke oven |
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| CN103449831B true CN103449831B (en) | 2015-09-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110229009A (en) * | 2019-07-11 | 2019-09-13 | 武汉重远炉窑工程技术服务有限公司 | A kind of siliceous soldering material |
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| CN107759239A (en) * | 2017-12-02 | 2018-03-06 | 山东鲁桥新材料股份有限公司 | A kind of preparation method for melting silica brick |
| CN108276010B (en) * | 2018-02-13 | 2020-07-17 | 山东钢铁股份有限公司 | Coke oven ceramic heat smearing material and preparation method thereof |
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| CN110229009A (en) * | 2019-07-11 | 2019-09-13 | 武汉重远炉窑工程技术服务有限公司 | A kind of siliceous soldering material |
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