CN103449831A - Welding repair material for repairing coking furnace and method for repairing coking furnace - Google Patents
Welding repair material for repairing coking furnace and method for repairing coking furnace Download PDFInfo
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- CN103449831A CN103449831A CN201310385576XA CN201310385576A CN103449831A CN 103449831 A CN103449831 A CN 103449831A CN 201310385576X A CN201310385576X A CN 201310385576XA CN 201310385576 A CN201310385576 A CN 201310385576A CN 103449831 A CN103449831 A CN 103449831A
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- repairing
- coke oven
- soldering material
- coking furnace
- repair material
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Abstract
The invention provides a welding repair material for repairing a coking furnace and a method for repairing the coking furnace. The welding repair material comprises the following components in percentage by weight: 1-3% of metal aluminium powder, 5-8% of metallic silicon powder, 2-5% of mineralizing agent, 65-85% of silica fume or quartz powder and 10-20% of quartz sand. The method for repairing the coking furnace comprises the steps of spraying the welding repair material for repairing the coking furnace onto a wall brick surface of a high temperature furnace to be repaired along with an oxygen-enriched gas and carrying out an oxidation reaction, so that the welding repair material is partially molten and adhered on the wall brick surface of the coking furnace to be repaired, and a ceramic repairing layer is formed. The welding repair material for repairing the coking furnace has the advantages that secondary resources such as coal ash and silica fume are taken as raw materials, high-efficiency comprehensive utilization of the secondary resources is realized, and production cost of the welding repair material is reduced; besides, aluminium and silicon metals are added, so that spontaneous heating sintering is realized, and no high temperature high pressure gas is adopted when the welding repair material for repairing the coking furnace is adopted for repairing the coking furnace; content of silica in the welding repair material for repairing the coking furnace is more than 90%, so that the welding repair material for repairing the coking furnace is a highly silicious welding repair material and has a good silica brick breaking effect when being used for repairing the coking furnace.
Description
Technical field
The present invention relates to technical field of refractory materials, more particularly, relate to a kind of coke oven silica brick and repair the ceramic welding material of use and adopt soldering material of the present invention to repair the method for coke oven.
Background technology
Coke oven is the thermal kiln furnace be built into by refractory brick, in use can cause due to a variety of causes the damage of coke oven furnace wall.In order to improve the work-ing life of coke oven, need to be repaired it.
The coke oven soldering comprises that wet method is repaired and the coke oven flame welding repair, and the former fettling is simple to operate, and maintenance cost is low, but has reduced the furnace wall surface temperature during fettling, and a bridging time is short, and severe operational environment, be eliminated gradually.The coke oven flame welding repair is to utilize thermal-flame by refractory powder and furnace wall refractory brick heating and melting for soldering, and make refractory powder adhere to the furnace wall surface of damage with physics mode, to repair damaged metope, usually take acetylene as fuel, with oxygen as combustion-supporting gas, need to adopt high temperature and high pressure gas in the process of repairing, in addition, rarely have at present the report about the soldering material component.
Summary of the invention
For the deficiencies in the prior art, one of purpose of the present invention is to solve in above-mentioned prior art the one or more problems that exist.
One of purpose of the present invention is to provide a kind of coke oven with the high siliceous soldering material of spontaneous heating and adopts this soldering material to repair the method for coke oven.
To achieve these goals, an aspect of of the present present invention provides a kind of coke oven to be comprised of 1～3% metallic aluminium powder, 5～8% metallic silicon power, 2～5% mineralizer, 65～85% silicon ash or the quartz sand of silica powder and 10～20% by weight percentage by the component of the described soldering material of soldering material.
An embodiment of soldering material for coke oven according to the present invention, the granularity of described metallic aluminium powder is to pass through 150 mesh sieves, wherein metallic aluminium content is more than 98wt%.
An embodiment of soldering material for coke oven according to the present invention, the granularity of described metallic silicon power is to pass through 200 mesh sieves, wherein Pure Silicon Metal content is more than 99wt%.
An embodiment of soldering material for coke oven according to the present invention, described mineralizer is flyash, the granularity of described flyash is to pass through 200 mesh sieves, in flyash, contains by weight percentage: SiO
2: 60～65, Al
2o
3: 25～32%, CaO:1～3%.
An embodiment of soldering material for coke oven according to the present invention, the granularity of described silicon ash is to pass through 200 mesh sieves, SiO in described silicon ash
2>=97wt%.
An embodiment of soldering material for coke oven according to the present invention, the granularity of described silica powder is to pass through 200 mesh sieves, SiO in described silica powder
2>=95wt%.
An embodiment of soldering material for coke oven according to the present invention, the granularity of described quartz sand is 0.088～0.2mm, SiO in described quartz sand
2>=95wt%.
Another aspect of the present invention provides a kind of method of repairing coke oven.Described method comprises described soldering material is sprayed to High Temperature Furnaces Heating Apparatus wall brick to be repaired surface and oxidizing reaction occurs with oxygen rich gas, makes soldering material be partially molten state and then sticks on furnace wall brick surface to be repaired, and forms ceramic repair layer.
According to an embodiment of the method for repairing coke oven of the present invention, to be air and oxygen mix according to the volume ratio of 1:5～1:8 described oxygen rich gas.
According to an embodiment of the method for repairing coke oven of the present invention, High Temperature Furnaces Heating Apparatus wall brick surface temperature described to be repaired is more than 700 ℃.
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, has realized the high-efficiency comprehensive utilization of secondary resource, and has reduced the production cost of soldering material; Add in addition metallic aluminium and Pure Silicon Metal, realize the spontaneous heating sintering, avoid adopting high temperature and high pressure gas when adopting soldering material of the present invention to carry out fettling; Dioxide-containing silica in the application's soldering material, more than 90%, belongs to high siliceous soldering material, effective for the breakage of soldering coke oven silica brick, and has environmental benefit and social benefit preferably.
Embodiment
Hereinafter, describe the method for coke oven according to the present invention with soldering material and repairing coke oven in detail in connection with exemplary embodiment.In the present invention, if there is no the statement of exception, in the material of usually mentioning, the content of each element or composition is all weight percentage (meaning with " wt% ").
The coke oven soldering material, be comprised of 1～3% metallic aluminium powder, 5～8% metallic silicon power, 2～5% flyash, 65～85% silicon ash and 10～20% quartz sands in weight percent according to an exemplary embodiment of the present invention.
Wherein, the granularity of the metallic aluminium powder used (can be passed through 150 mesh sieves) below 150 orders, and wherein metallic aluminium content is more than 98wt%.The granularity of metallic silicon power (can be passed through 200 mesh sieves) below 200 orders, and wherein Pure Silicon Metal content is 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%.The silicon ash be again silicon powder, also be SILICA FUME or silicon dioxide ultrafine powder, generally be referred to as the silicon ash.The silicon ash is the SiO produced when smelting ferrosilicon and industrial silicon
2with Si gas and the rapid oxidation of airborne oxygen condensation and a kind of ultra-fine siliceous powder body material formed.The present invention to the requirement of silicon ash is: granularity below 200 orders, SiO in the 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 comprised of heat-generating agent, mineralizer, refractory matter three parts.Heat-generating agent adopts the mixture of metallic aluminium powder and metallic silicon power, the aluminium powder heat generation is good, if but the aluminium powder consumption is too high, meeting and silicon dioxde reaction after oxidation, form the mullite phase, affect the performance of soldering layer, the metallic silicon power heating effect is compared poor with aluminium powder, if but suitably use, can make up the deficiency of heat-generating agent heating, and after the metallic silicon power oxidation, material is silicon-dioxide, can improve the performance of soldering layer, if use other heat-generating agent, thermal value is not high, and affects the quality of high siliceous material.
In the present embodiment, mineralizer adopts flyash, and for sial is material, 1350～1410 ℃ of fusing points, meet the fusion bonding of soldering material under siliceous soldering material spray repair condition, forms combination.But the invention is not restricted to this, flyash can adopt other equivalent material, for example Calucium Silicate powder equates, but the preferred powder coal ash is used both environmental protection of flyash, and the mineralising performance is good again.
Refractory matter quartz sand mainly plays fire-resistant skeleton function, and certain granularity has guaranteed the smooth delivery of power of material and the compactness of soldering layer.Silicon ash main component is silicon-dioxide, primary structure is quartz silica and a small amount of indefinite form body, refractoriness is greater than 1620 ℃, fire-resistant skeleton function is played in main and quartz sand collocation, and the silicon ash itself has a small amount of indefinite form silicon-dioxide, for low melting point, can play the mineralizer effect, improve the adhesiving effect of soldering material.The silicon ash can adopt the following silica powder of 200 orders to substitute, SiO in silica powder
2>=95wt%.Here preferably use the both environmental protection of silicon ash, can improve again the soldering performance of soldering material.
In the present embodiment, soldering material is comprised of the metallic aluminium powder of 1～3wt%, the metallic silicon power of 5～8wt%, the flyash of 2～5wt%, silicon ash and the 10～20wt% quartz sand of 65～85wt%.The reason that the proportioning of each component is chosen in the said ratio scope 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 can't be guaranteed, if the consumption of metallic aluminium powder is too large, easily affects the quality of soldering layer; Metallic silicon power can be used as heat-generating agent by the Substitute For Partial metallic aluminium powder, forms the silicon-dioxide that does not affect soldering layer quality after oxidation, if but usage quantity is too high, and can cause oxidation incomplete, finally also can affect the quality of soldering material.Flyash is mineralizer, and add-on is that 2～5wt% is more suitable, does not have very little the mineralizer effect, affects too much fire performance and the adhesion property of soldering material.The quartz sand of certain particle size and the collocation of the silicon of finely powdered ash are used as refractory powder, and the quartz sand consumption can not be too large, otherwise affect the compactness of material transportation performance and soldering material.
Below the size range of each component of soldering material is selected to be elaborated.Metallic aluminium powder is below 150 orders, and metallic silicon power is below 200 orders, guarantees the heat-generating agent oxidation of generating heat as far as possible under high-temperature oxygen-enriched atmosphere in spraying process, avoids that the heat-generating agent particle is excessive causes oxidation incomplete, affects the performance of soldering layer.Flyash adopts three grades of flyash, below granularity 200 orders, guarantees that flyash is dispersed in material, generate in time liquid phase, adhere to refractory aggregate, below silicon ash granularity 200 orders, use with the quartz sand collocation of 0.088～0.2mm, can guarantee that the putty situation does not appear in material in course of conveying, and the adhesion property of raising soldering material, and guaranteeing that the soldering layer has higher compactness, quartz sand particle can not be too large, otherwise segregation easily occurs in material conveying process, cause material inhomogeneous.
The compound method of this soldering material is: by the metallic aluminium powder of 1～3wt%, and the metallic silicon power of 5～8wt%, the flyash of 2～5wt%, the silicon ash of 65～85wt% and the quartz sand of 10～20wt% mix rear formation soldering material, and this soldering material needs sealed storage.
When adopting soldering material of the present invention to carry out coke oven, its concrete construction technology is: by the soldering material ceramic welding-repairing machine feed bin of packing into, delivery medium is oxygen rich gas, it is the mixture of air and oxygen, wherein both volume ratios are air: oxygen=1:5～1:8, spray gun is stretched in the coke oven more than 700 ℃, shower nozzle is aimed at needs the position of repairing, open welding repair machine, oxidizing reaction at high temperature occurs in soldering material and oxygen rich gas, make soldering material be partially molten state and stick to the silica brick surface, form ceramic repair layer.
While soldering material of the present invention being sprayed under oxygen-enriched atmosphere to the coke oven silica brick surface more than 700 ℃, due to high temperature action own in coke oven, heat-generating agent in soldering material is oxidized heating under oxygen-enriched atmosphere, make flame temperature reach 1400～1550 ℃, the heat-generating agent metallic aluminium is oxidized to aluminum oxide, metallic silicon power is oxidized to silicon-dioxide, under 1400～1550 ℃ of spraying temperatures, mineralizer in soldering material (low melting point in flyash and silicon ash) forms the melting phase, by quartz sand, refractory powder in the silicon ash sticks into one, the fine and close ceramic body of cooling rear formation, can extend kiln work-ing life.
The soldering material that the application relates to adopts heat-generating agent, mineralizer, refractory powder to arrange in pairs or groups mutually, and wherein mineralizer and silicon ash granularity are thinner, and the spontaneous good in thermal property of heat-generating agent, guaranteed that soldering material bridging rate is high, the matrix densification, and compressive strength is high.
In order to understand better above-mentioned exemplary embodiment of the present invention, 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 the performance index of each assembly welding feed supplement are compared, result is as shown in table 2, can find out, and the performance index of five assembly welding feed supplements are all better, meet production requirement.
Table 1 mix proportion scheme
Table 2 performance index
In sum, the present invention adopts the secondary resources such as flyash, silicon ash as raw material, has realized the high-efficiency comprehensive utilization of secondary resource, and has reduced the production cost of soldering material, its cost is no more than 5000 yuan/tons, far below the commodity ceramic welding material on market (3.5 ten thousand yuan/tons of unit prices); Add in addition metallic aluminium and Pure Silicon Metal, realize the spontaneous heating sintering, avoid adopting high temperature and high pressure gas when adopting soldering material of the present invention to carry out fettling; Dioxide-containing silica in the application's soldering material, more than 90%, belongs to high siliceous soldering material, effective for the breakage of soldering coke oven silica brick, and has environmental benefit and social benefit preferably.
Do not break away from although the above, by conjunction with exemplary embodiment, having described the present invention, it will be apparent to those skilled in the art that the spirit and scope that claim limits, can carry out various modifications and change to exemplary embodiment of the present invention.
Claims (10)
1. a coke oven soldering material, it is characterized in that, the component of described soldering material is comprised of 1～3% metallic aluminium powder, 5～8% metallic silicon power, 2～5% mineralizer, 65～85% silicon ash or the quartz sand of silica powder and 10～20% by weight percentage.
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 metallic aluminium content is 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 Pure Silicon Metal content is more than 99wt%.
4. coke oven soldering material according to claim 1, is characterized in that, described mineralizer is flyash, and the granularity of described flyash is to pass through 200 mesh sieves, in flyash, contains by weight percentage: SiO
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 powder is to pass through 200 mesh sieves, SiO in described silica powder
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. a method of repairing coke oven, it is characterized in that, described method comprises coke oven is as claimed in any of claims 1 to 7 in one of claims sprayed to High Temperature Furnaces Heating Apparatus wall brick surface to be repaired and oxidizing reaction occurs with oxygen rich gas with soldering material, make soldering material be partially molten state and then stick on furnace wall brick surface to be repaired, forming ceramic repair layer.
9. the method for repairing coke oven according to claim 8, is characterized in that, to be air and oxygen mix according to the volume ratio of 1:5～1:8 described oxygen rich gas.
10. the method for repairing coke oven according to claim 8, is characterized in that, High Temperature Furnaces Heating Apparatus wall brick surface temperature described to be repaired is more than 700 ℃.
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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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| Publication Number | Publication Date |
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| CN103449831A true CN103449831A (en) | 2013-12-18 |
| CN103449831B CN103449831B (en) | 2015-09-09 |
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| CN104193360A (en) * | 2014-08-18 | 2014-12-10 | 攀钢集团攀枝花钢铁研究院有限公司 | RH insert tube scalding material and RH insert tube scalding method |
| CN107556004A (en) * | 2017-07-12 | 2018-01-09 | 宜兴瑞泰耐火材料工程有限公司 | A kind of ceramic wear-resisting material for repairing for CFB boiler |
| 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 |
| CN108276010A (en) * | 2018-02-13 | 2018-07-13 | 山东钢铁股份有限公司 | Hot fed batch of a kind of coke oven ceramics and preparation method thereof |
| CN109694238A (en) * | 2019-01-11 | 2019-04-30 | 宜兴市恒祥耐火材料有限公司 | Ceramic welding material and its method for using the soldering material soldering coke oven |
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| CN110607179A (en) * | 2018-06-14 | 2019-12-24 | 宝山钢铁股份有限公司 | Method for reducing difficult coke pushing through improving defects of furnace wall of coke oven carbonization chamber |
| CN111269008A (en) * | 2020-02-24 | 2020-06-12 | 嘉峪关市长城望宇炉业有限责任公司 | Zirconium-containing ceramic welding material for hot repair and sealing of coke oven wall and repair method |
| CN111574233A (en) * | 2020-05-26 | 2020-08-25 | 中钢洛耐新材料科技有限公司 | Ceramic wear-resistant hot gunning mix and preparation method thereof |
| CN112979295A (en) * | 2019-12-13 | 2021-06-18 | 宝武装备智能科技有限公司 | Silica sol combined pressing material for coke oven closed repair and preparation method thereof |
| CN113200757A (en) * | 2021-04-30 | 2021-08-03 | 郑州东豫新材料科技有限公司 | Thermal-state repairing material for kiln and using method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104193360A (en) * | 2014-08-18 | 2014-12-10 | 攀钢集团攀枝花钢铁研究院有限公司 | RH insert tube scalding material and RH insert tube scalding method |
| CN107556004B (en) * | 2017-07-12 | 2020-07-03 | 宜兴瑞泰耐火材料工程有限公司 | Ceramic wear-resistant repair material for CFB boiler |
| CN107556004A (en) * | 2017-07-12 | 2018-01-09 | 宜兴瑞泰耐火材料工程有限公司 | A kind of ceramic wear-resisting material for repairing for CFB boiler |
| 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 |
| CN108276010A (en) * | 2018-02-13 | 2018-07-13 | 山东钢铁股份有限公司 | Hot fed batch of a kind of coke oven ceramics and preparation method thereof |
| CN110607179A (en) * | 2018-06-14 | 2019-12-24 | 宝山钢铁股份有限公司 | Method for reducing difficult coke pushing through improving defects of furnace wall of coke oven carbonization chamber |
| CN109694238A (en) * | 2019-01-11 | 2019-04-30 | 宜兴市恒祥耐火材料有限公司 | Ceramic welding material and its method for using the soldering material soldering coke oven |
| CN110229010A (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 zirconium matter soldering material and its application method |
| CN112979295A (en) * | 2019-12-13 | 2021-06-18 | 宝武装备智能科技有限公司 | Silica sol combined pressing material for coke oven closed repair and preparation method thereof |
| CN111269008A (en) * | 2020-02-24 | 2020-06-12 | 嘉峪关市长城望宇炉业有限责任公司 | Zirconium-containing ceramic welding material for hot repair and sealing of coke oven wall and repair method |
| CN111269008B (en) * | 2020-02-24 | 2022-01-28 | 嘉峪关市长城望宇炉业有限责任公司 | Zirconium-containing ceramic welding material for hot repair and sealing of coke oven wall and repair method |
| CN111574233A (en) * | 2020-05-26 | 2020-08-25 | 中钢洛耐新材料科技有限公司 | Ceramic wear-resistant hot gunning mix and preparation method thereof |
| CN113200757A (en) * | 2021-04-30 | 2021-08-03 | 郑州东豫新材料科技有限公司 | Thermal-state repairing material for kiln and using method thereof |
| CN114133255A (en) * | 2021-12-17 | 2022-03-04 | 河北鑫达钢铁集团有限公司 | Heating furnace heat storage box body repairing material and preparation method thereof |
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