CN101514377B - Ironmaking blast furnace lining carbon brick and preparation method thereof - Google Patents
Ironmaking blast furnace lining carbon brick and preparation method thereof Download PDFInfo
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- CN101514377B CN101514377B CN2009100612045A CN200910061204A CN101514377B CN 101514377 B CN101514377 B CN 101514377B CN 2009100612045 A CN2009100612045 A CN 2009100612045A CN 200910061204 A CN200910061204 A CN 200910061204A CN 101514377 B CN101514377 B CN 101514377B
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Abstract
The invention more particularly relates to an ironmaking blast furnace lining carbon brick and a preparation method thereof. The invention adopts the technical proposal that the carbon brick comprises 30-80wt% of electro-forge coal, 5-20wt% of natural crystalline flake graphite, 5-40% of artificial graphite, 2-8wt% of elemental silicon powder, 3-8wt% of aluminum oxide micro powder and mixture of modified phenolic resin and phenolic resin being 8-20wt% of the mixture of the electro-forge coal, the natural crystalline flake graphite, the artificial graphite, the elemental silicon powder and the aluminum oxide micro powder. According to the components of the carbon brick, the preparing technique is that the electro-forge coal and the artificial graphite are firstly mixed and milled for 1-3min, added with resin for cold mixed milling for 3-5min, and then added with the silicon powder, the aluminum oxide micro powder, the natural crystalline flake graphite and the artificial graphite fine powder for cold mixed milling for 15-30min; after that, cold mould pressing or vibration molding is carried out; finally, the product is sintered at 1200-1400 DEG C under the condition of carbon burying atmosphere. The invention can effectively improve the heat conducting property of the carbon brick to lead the coefficient of heat conductivity of the carbon brick to be higher than 30W/(m.K), thus prolonging the service life of the carbon brick.
Description
Technical field
The invention belongs to technical field of refractory materials, be specifically related to a kind of ironmaking blast furnace lining carbon brick and preparation method thereof.
Background technology
The working conditions of blast furnace hearth, furnace bottom becomes extremely abominable in recent years, the speed of erosion, breakage is very rapid, cupola well and furnace bottom are storing red-hot molten iron, repair difficultly unusually, thereby the lining life that how to improve blast furnace hearth, furnace bottom becomes metallargist's common problem.Blast furnace hearth, furnace bottom mainly contain following several respects with the damage of brick fuel refractory materials: the infiltration of molten iron, corrosion and wash away, and basic metal corrodes, thermal stress damage, the oxidation corrode, CO decomposes and produces C deposition etc.
The manufacture method of brick fuel generally is to make aggregate with the electro-forge hard coal, add natural flake graphite or synthetic graphite and improve thermal conductivity, add silica flour and improve the micropore rate, add ceramic phase such as corundum etc. simultaneously and improve its resistance to fouling, after batching, mixed rolling, mold pressing or vibratory compaction, bury the charcoal roasting as wedding agent with coal-tar pitch (resol) and form.When adopting resin to make wedding agent, because of the carbon structure after its carbonization is amorphous vitreous carbon, its thermal conductivity is little, and carbon residue is few, thereby has weakened the heat conductivility of brick fuel greatly.If the heat conductivility of brick fuel is poor, in its use, be difficult for forming the slag iron protective layer that solidifies on the brick fuel surface, can make molten iron more serious to washing away of brick fuel, aggravated the destruction of thermal stresses simultaneously to brick fuel.Therefore improve iron-smelting blast furnace and become very important with the heat conductivility of brick fuel.
Summary of the invention
The present invention is intended to overcome existing technological deficiency, ironmaking blast furnace lining carbon brick that purpose provides a kind of high thermal conductivity, can increase the service life and preparation method thereof.
For finishing above-mentioned task, the technical scheme that brick fuel component of the present invention adopts is: the electro-forge coal is that 30～80wt%, natural flake graphite are that 5～20wt%, synthetic graphite are that 5～40wt%, simple substance silica flour are that 2～8wt% and alumina powder are 3～8wt%, adds the modified phenolic resins of above-mentioned compound 8～20wt% and the mixture of resol.
The present invention is by the component of above-mentioned brick fuel, its preparation technology is: earlier electro-forge coal and synthetic graphite are mixed rolling 1～3 minute, add resin and carry out the mixed rolling of cold conditions, mixing the rolling time is 3～5 minutes, add silica flour, alumina powder, natural flake graphite and synthetic graphite fine powder again, cold conditions mix to be rolled over 15～30 minutes, carried out cold conditions mold pressing or vibratory compaction then, burnt till under 1200～1400 ℃ of conditions burying under the charcoal atmosphere at last.
Wherein: the grain composition of electro-forge coal is, granularity be 5～3mm account for 10～25wt%, granularity be 3～1mm account for 10～35wt%, granularity is the 10～20wt% that accounts for of 1～0mm; The grain composition of synthetic graphite is, granularity be 3～1mm account for 1～10wt%, granularity is the 2～20wt% that accounts for that accounts for 2～10wt%, granularity＜0.088mm of 1～0mm; The granularity of natural flake graphite is＜0.074mm; The granularity of simple substance silica flour is＜0.045mm; Granularity＜the 0.005mm of alumina powder.
The mixture of modified phenolic resins and resol is, modified phenolic resins is 40～100wt% of mixture, and resol is 0～60wt% of mixture; Modified phenolic resins is more than one in molybdenum modified phenolic resins, nickel modified phenolic resins, cobalt improved resol, the two luxuriantization iron modified phenolic resinss.
Because adopt technique scheme, the present invention can effectively improve the heat conductivility of ironmaking blast furnace lining carbon brick, its thermal conductivity of 600 ℃ prolongs the work-ing life of brick fuel greater than 30W/ (mK).
Embodiment
The present invention will be further described below in conjunction with embodiment, is not the restriction to protection domain.
Embodiment 1
A kind of preparation method of ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 30～40wt%, natural flake graphite are that 10～20wt%, synthetic graphite are that 24～35wt%, simple substance silica flour are that 2～8wt% and alumina powder are 3～8wt%, adds the molybdenum modified phenolic resins of above-mentioned compound 8～10wt% and the mixture of resol; Wherein, the molybdenum modified phenolic resins is 80～95wt% of mixture, and resol is 5～20wt% of mixture.
Component by described brick fuel, its preparation technology is: earlier electro-forge coal and synthetic graphite are mixed rolling 1～3 minute, add resin and carry out the mixed rolling of cold conditions, mixing the rolling time is 3～5 minutes, add silica flour, alumina powder, natural flake graphite and synthetic graphite fine powder again, cold conditions mix to be rolled over 15～30 minutes, carried out cold conditions mold pressing or vibratory compaction then, burnt till under 1200～1250 ℃ of conditions burying under the charcoal atmosphere at last.
Wherein: the grain composition of electro-forge coal is, granularity be 5～3mm account for 10～25wt%, granularity be 3～1mm account for 10～35wt%, granularity is the 10～20wt% that accounts for of 1～0mm; The grain composition of synthetic graphite is, granularity be 3～1mm account for 1～10wt%, granularity is the 2～20wt% that accounts for that accounts for 2～10wt%, granularity＜0.088mm of 1～0mm; The granularity of natural flake graphite is＜0.074mm; The granularity of simple substance silica flour is＜0.045mm; Granularity＜the 0.005mm of alumina powder.
The prepared ironmaking blast furnace lining carbon brick of present embodiment after testing, thermal conductivity (600 ℃) is 40～50 (W/mK).
Embodiment 2
A kind of preparation method of ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 40～50wt%, natural flake graphite are that 5～10wt%, synthetic graphite are that 14～40wt%, simple substance silica flour are that 2～8wt% and alumina powder are 3～8wt%, adds the cobalt improved resol of above-mentioned compound 8～10wt% and the mixture of resol; Wherein, cobalt improved resol is 70～80wt% of mixture, and resol is 20～30wt% of mixture.
Preparation technology except that at last bury under 1250～1300 ℃ of conditions, burn till under the charcoal atmosphere, all the other are with embodiment 1.
The prepared ironmaking blast furnace lining carbon brick of present embodiment after testing, thermal conductivity (600 ℃) is 35～45 (W/mK).
Embodiment 3
A kind of preparation method of ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 50～60wt%, natural flake graphite are that 10～20wt%, synthetic graphite are that 5～15wt%, simple substance silica flour are that 2～8wt% and alumina powder are 3～8wt%, adds molybdenum modified phenolic resins and the nickel modified phenolic resins of above-mentioned compound 8～10wt%.
Preparation technology removes vibratory compaction, bury under 1300～1350 ℃ of conditions, burn till under the charcoal atmosphere outside, all the other are with embodiment 1.
The prepared ironmaking blast furnace lining carbon brick of present embodiment after testing, thermal conductivity (600 ℃) is 45～55 (W/mK).
Embodiment 4
A kind of preparation method of ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 60～70wt%, natural flake graphite are that 5～10wt%, synthetic graphite are that 10～15wt%, simple substance silica flour are that 5～8wt% and alumina powder are 5～8wt%, adds the nickel modified phenolic resins of above-mentioned compound 10～15wt% and the mixture of resol; Wherein, the nickel modified phenolic resins is 65～75wt% of mixture, and resol is 25～40wt% of mixture.
Preparation technology removes vibratory compaction, bury under 1350～1400 ℃ of conditions, burn till under the charcoal atmosphere outside, all the other are with embodiment 1.
The prepared ironmaking blast furnace lining carbon brick of present embodiment after testing, thermal conductivity (600 ℃) is 38～42 (W/mK).
Embodiment 5
A kind of preparation method of ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 70～80wt%, natural flake graphite are that 5～8wt%, synthetic graphite are that 5～15wt%, simple substance silica flour are that 2～5wt% and alumina powder are 3～5wt%, adds the two luxuriantization iron modified phenolic resinss of above-mentioned compound 10～15wt% and the mixture of resol; Wherein, two luxuriantization iron modified phenolic resinss are 55～65wt% of mixture, and resol is 35～45wt% of mixture.
Preparation technology except that at last bury under 1250～1300 ℃ of conditions, burn till under the charcoal atmosphere, all the other are with embodiment 1.
The prepared ironmaking blast furnace lining carbon brick of present embodiment after testing, thermal conductivity (600 ℃) is 34～38 (W/mK).
Embodiment 6
A kind of preparation method of ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 35～45wt%, natural flake graphite are that 5～15wt%, synthetic graphite are that 24～35wt%, simple substance silica flour are that 5～8wt% and alumina powder are 5～8wt%, adds cobalt improved resol and the two luxuriantization iron modified phenolic resinss of above-mentioned compound 10～15wt%.
Preparation technology except that at last bury under 1250～1300 ℃ of conditions, burn till under the charcoal atmosphere, all the other are with embodiment 1.
The prepared ironmaking blast furnace lining carbon brick of present embodiment after testing, thermal conductivity (600 ℃) is 37～49 (W/mK).
Embodiment 7
A kind of preparation method of ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 45～55wt%, natural flake graphite are that 15～20wt%, synthetic graphite are that 10～20wt%, simple substance silica flour are that 4～8wt% and alumina powder are 5～8wt%, adds the nickel modified phenolic resins of above-mentioned compound 15～18wt% and the mixture of resol; Wherein, the nickel modified phenolic resins is 55～65wt% of mixture, and resol is 35～45wt% of mixture.
Preparation technology except that at last bury under 1300～1350 ℃ of conditions, burn till under the charcoal atmosphere, all the other are with embodiment 1.
The prepared ironmaking blast furnace lining carbon brick of present embodiment after testing, thermal conductivity (600 ℃) is 34～44 (W/mK).
Embodiment 8
A kind of preparation method of ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 55～65wt%, natural flake graphite are that 5～15wt%, synthetic graphite are that 5～15wt%, simple substance silica flour are that 4～8wt% and alumina powder are 5～8wt%, adds the nickel modified phenolic resins of above-mentioned compound 15～18wt% and the mixture of cobalt improved resol and resol; Wherein, nickel modified phenolic resins and cobalt improved resol are 65～75wt% of mixture, and resol is 25～35wt% of mixture.
Preparation technology except that at last bury under 1350～1400 ℃ of conditions, burn till under the charcoal atmosphere, all the other are with embodiment 1.
The prepared ironmaking blast furnace lining carbon brick of present embodiment after testing, thermal conductivity (600 ℃) is 36～45 (W/mK).
Embodiment 9
Plant the preparation method of ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 65～75wt%, natural flake graphite are that 5～10wt%, synthetic graphite are that 5～10wt%, simple substance silica flour are that 5～8wt% and alumina powder are 5～8wt%, adds molybdenum modified phenolic resins and the two luxuriantization iron modified phenolic resinss of above-mentioned compound 15～18wt%.
Preparation technology except that at last bury under 1200～1250 ℃ of conditions, burn till under the charcoal atmosphere, all the other are with embodiment 1.
The prepared ironmaking blast furnace lining carbon brick of present embodiment after testing, thermal conductivity (600 ℃) is 30～36 (W/mK).
Embodiment 10
Plant the preparation method of ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 70～80wt%, natural flake graphite are that 5～8wt%, synthetic graphite are that 5～8wt%, simple substance silica flour are that 2～8wt% and alumina powder are 4～6wt%, adds the nickel modified phenolic resins of above-mentioned compound 18～20wt% and the mixture of resol; Wherein, the nickel modified phenolic resins is 40～65wt% of mixture, and resol is 35～60wt% of mixture.
Preparation technology except that at last bury under 1350～1400 ℃ of conditions, burn till under the charcoal atmosphere, all the other are with embodiment 1.
The prepared ironmaking blast furnace lining carbon brick of present embodiment after testing, thermal conductivity (600 ℃) is 30～34 (W/mK).
Embodiment 11
Plant the preparation method of ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 70～80wt%, natural flake graphite are that 5～8wt%, synthetic graphite are that 5～8wt%, simple substance silica flour are that 2～8wt% and alumina powder are 4～6wt%, adds the two luxuriantization iron modified phenolic resinss of above-mentioned compound 18～20wt% and the mixture of resol; Wherein, two luxuriantization iron modified phenolic resinss are 75～85wt% of mixture, and resol is 15～25wt% of mixture.
Preparation technology except that at last bury under 1250～1300 ℃ of conditions, burn till under the charcoal atmosphere, all the other are with embodiment 1.
The prepared ironmaking blast furnace lining carbon brick of present embodiment after testing, thermal conductivity (600 ℃) is 35～43 (W/mK).
Embodiment 12
Plant the preparation method of ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 70～80wt%, natural flake graphite are that 5～8wt%, synthetic graphite are that 5～8wt%, simple substance silica flour are that 2～8wt% and alumina powder are 4～6wt%, adds the modified phenolic resins of above-mentioned compound 18～20wt%.Modified phenolic resins is the mixture of molybdenum modified phenolic resins, nickel modified phenolic resins, cobalt improved resol and two luxuriantization iron modified phenolic resinss.
Preparation technology except that at last bury under 1350～1400 ℃ of conditions, burn till under the charcoal atmosphere, all the other are with embodiment 1.
The prepared ironmaking blast furnace lining carbon brick of present embodiment after testing, thermal conductivity (600 ℃) is 43～51 (W/mK).
This embodiment can effectively improve the heat conductivility of ironmaking blast furnace lining carbon brick, and its thermal conductivity of 600 ℃ prolongs the work-ing life of brick fuel greater than 30W/ (mK).
Claims (4)
1. the preparation method of an ironmaking blast furnace lining carbon brick, the component that it is characterized in that described brick fuel is: the electro-forge coal is that 30～80wt%, natural flake graphite are that 5～20wt%, synthetic graphite are that 5～40wt%, simple substance silica flour are that 2～8wt% and alumina powder are 3～8wt%, adds the modified phenolic resins of above-mentioned compound 8～20wt% and the mixture of resol;
Component by described brick fuel, its preparation technology is: earlier electro-forge coal and synthetic graphite are mixed rolling 1～3 minute, add resin and carry out the mixed rolling of cold conditions, mixing the rolling time is 3～5 minutes, add silica flour, alumina powder, natural flake graphite and synthetic graphite fine powder again, cold conditions mix to be rolled over 15～30 minutes, carried out cold conditions mold pressing or vibratory compaction then, burnt till under 1200～1400 ℃ of conditions burying under the charcoal atmosphere at last;
Described modified phenolic resins is more than one in molybdenum modified phenolic resins, nickel modified phenolic resins, cobalt improved resol, the two luxuriantization iron modified phenolic resinss.
2. the preparation method of ironmaking blast furnace lining carbon brick according to claim 1, the grain composition that it is characterized in that described electro-forge coal is: granularity is the 10～25wt% that accounts for of 5～3mm, granularity is the 10～35wt% that accounts for of 3～1mm, and granularity is the 10～20wt% that accounts for of 1～0mm.
3. the preparation method of ironmaking blast furnace lining carbon brick according to claim 1 is characterized in that the granularity of described natural flake graphite is＜0.074mm, and the granularity of simple substance silica flour is＜0.045mm the granularity＜0.005mm of alumina powder.
4. according to the prepared ironmaking blast furnace lining carbon brick of preparation method of each ironmaking blast furnace lining carbon brick in the claim 1～3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100612045A CN101514377B (en) | 2009-03-20 | 2009-03-20 | Ironmaking blast furnace lining carbon brick and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100612045A CN101514377B (en) | 2009-03-20 | 2009-03-20 | Ironmaking blast furnace lining carbon brick and preparation method thereof |
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| CN101514377A CN101514377A (en) | 2009-08-26 |
| CN101514377B true CN101514377B (en) | 2011-05-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103242050A (en) * | 2013-05-13 | 2013-08-14 | 昆山思创耐火材料有限公司 | Carbon brick with high thermal conductivity for iron-smelting blast furnace lining, and preparation method thereof |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603343B (en) * | 2012-04-10 | 2013-08-21 | 武汉科技大学 | Fireproof material of furnace bottom of blast furnace hearth and preparation method of fireproof material |
| CN102674869B (en) * | 2012-06-07 | 2013-09-18 | 武汉科技大学 | Carbon composite material for side wall of lower part of aluminium electrolysis cell and preparation method thereof |
| CN102992793A (en) * | 2012-12-06 | 2013-03-27 | 武汉钢铁(集团)公司 | High-thermal-conductivity carbon brick and production method for same |
| CN103613393B (en) * | 2013-11-11 | 2017-06-16 | 中冶南方邯郸武彭炉衬新材料有限公司 | A kind of blast furnace lining brick fuel and preparation method thereof |
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2009
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103242050A (en) * | 2013-05-13 | 2013-08-14 | 昆山思创耐火材料有限公司 | Carbon brick with high thermal conductivity for iron-smelting blast furnace lining, and preparation method thereof |
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| CN101514377A (en) | 2009-08-26 |
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Application publication date: 20090826 Assignee: MCC NANFANG HANDAN WUPENG LINING NEW MATERIAL CO., LTD. Assignor: Wuhan University of Science and Technology Contract record no.: 2012130000134 Denomination of invention: Briquette for iron-smelting blast furnace lining and its preparation method Granted publication date: 20110518 License type: Exclusive License Record date: 20120725 |
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