CN1296318C - Soper microporous carbon brick for furnace lining and its producing method - Google Patents
Soper microporous carbon brick for furnace lining and its producing method Download PDFInfo
- Publication number
- CN1296318C CN1296318C CNB2004100260876A CN200410026087A CN1296318C CN 1296318 C CN1296318 C CN 1296318C CN B2004100260876 A CNB2004100260876 A CN B2004100260876A CN 200410026087 A CN200410026087 A CN 200410026087A CN 1296318 C CN1296318 C CN 1296318C
- Authority
- CN
- China
- Prior art keywords
- carbon brick
- graphite
- furnace lining
- raw material
- weight percent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 239000011449 brick Substances 0.000 title claims abstract description 52
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 21
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003830 anthracite Substances 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 40
- 229910002804 graphite Inorganic materials 0.000 claims description 22
- 239000010439 graphite Substances 0.000 claims description 22
- 239000000377 silicon dioxide Substances 0.000 claims description 20
- 239000000428 dust Substances 0.000 claims description 19
- 235000013312 flour Nutrition 0.000 claims description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 6
- 239000011294 coal tar pitch Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 38
- 229910052742 iron Inorganic materials 0.000 abstract description 19
- 239000011148 porous material Substances 0.000 abstract description 10
- 239000000654 additive Substances 0.000 abstract description 7
- 230000000996 additive effect Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 3
- 239000011819 refractory material Substances 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 23
- 239000011159 matrix material Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention mainly relates to a carbon refractory material for iron smelting blast furnaces and a making method thereof, particularly to an ultramicropore carbon brick suitable for blast furnace crucible key positions and a making method thereof. The ultramicropore carbon brick has the raw materials by weight percentage of 20 to 25% of adhesive, 20 to 30% of electrically calcined anthracite, 10 to 20% of graphitic and 35 to 40% of co-ground powder. Since the present invention uses the effective additive and the co-grinding technology, the additive in the ingredients can be sufficiently combined with carbon substrates, which is favorable to the generation of chemical reaction in the calcining process and the formation of micropores, and the pore volume of the carbon brick of less than 1 mum reaches more than 80%; the iron melt corrosion rate of the carbon brick is reduced to be below 20%.
Description
Technical field:
The present invention relates generally to a kind of iron-smelting blast furnace with carbon refractory and manufacture method thereof, relates in particular to a kind of ultramicropore brick fuel and manufacture method thereof that is suitable for the blast furnace hearth key position.
Background technology:
Blast furnace is to utilize iron ore-coke reduction method to produce the main equipment of molten iron in the TECHNIQUE TO LARGE INTEGRATED STEEL WORKS.Brick fuel because have that good high-temperature intensity, excellent slag resistance, alkali resistance are good, good heat conductivity and be used as the inner lining material at blast furnace hearth and furnace bottom position.Closely for decades, because the hot repair technology rapid development, hot repair can be realized in the blast furnace stack position, and shaft position properties of refractories no longer determines campaign life.Blast furnace hearth can't realize hot repair, thereby the life-span of carbon line is determining campaign life owing to storing red-hot molten iron.Along with modern blast furnace maximizes day by day and realizes the strengthening smelting technology, the blast furnace overhaul expense is improved, prolong blast furnace campaign and become iron work and reduce cost, increase the major objective of benefit, thereby the brick fuel quality has been proposed more and more higher requirement.
In the cupola well zone, molten iron can be penetrated into diameter and be about in the pore of 1 μ m, and the hot strength of brick fuel reduces with the increase of molten iron infiltration capacity, and at the inner embrittlement layer that forms of brick fuel, under the thermal stresses effect, brick fuel peels off; The stripping in molten iron of brick fuel matrix, this is not only the homogeneous dissolving from the brick fuel surface, and the pore of molten iron intrusion matrix part, and matrix is dissolving in advance partly, and coarse particles is free, and quilt is brought in the molten iron; CO and alkali metal vapour in blast furnace gas and the slag iron corrode brick fuel.
The blast furnace carbon brick kind of using has ordinary blast brick fuel, semi-graphite blast furnace carbon brick and blast furnace microporous carbon brick at present, and what wherein quality was best is the blast furnace microporous carbon brick, and the pore volume of＜1 μ m is 70%, and thermal conductivity is 14W/m.K, and alkali resistance is excellent or good.
Summary of the invention:
The objective of the invention is to avoid the deficiencies in the prior art part and a kind of furnace lining ultramicropore brick fuel and manufacture method thereof are provided.Further improve the quality of brick fuel, a kind of ultramicropore brick fuel as ironmaking blast furnace lining is provided, the pore volume of＜1 μ m reaches 80%, and thermal conductivity reaches 20W/m.K, and molten iron corrosion rate reaches 20%, and it is excellent that alkali resistance reaches.This brick fuel especially is suitable as the key position of blast furnace hearth, can improve the ability of anti-molten iron perviousness of basque and anti-corrosion, strengthens cooling performance, stablizes blast furnace operating, reaches the purpose that prolongs blast furnace campaign.
Purpose of the present invention can be by realizing by the following technical solutions: it be that binding agent 20～25%, electric calcined anthracite 20～30%, graphite 10～20%, common abrasive dust are 35～40% that a kind of furnace lining ultramicropore carbon brick, its raw material are formed (weight percent); Described altogether abrasive dust raw material is formed (weight percent) for graphite is 40～60%, silica flour is 25～35%, aluminum oxide powder is 10～15%, silica powder 5～10%.
Described binding agent is a coal-tar pitch.
The furnace lining of the present invention manufacture method of ultramicropore carbon brick, according to the following steps:
(1). graphite is pulverized;
(2). screening: press furnace lining and sieve with ultramicropore carbon brick raw material granularity;
(3). batching:
Forming (weight percent) binding agent 20～25%, graphite 10～20%, electric calcined anthracite 20～30%, be total to abrasive dust with ultramicropore carbon brick raw material by furnace lining is 35～40%; Described altogether abrasive dust raw material forms that (weight percent) graphite is 40～60%, silica flour is 25～35%, aluminum oxide powder is 10～15%, silica powder 5～10%.
(4). mix and pinch;
(5). cool material;
(6). extrusion molding;
(7). roasting: 1200～1500 ℃ of temperature, the residence time under the top temperature is 10～20 hours;
(8). mechanical workout.
The described furnace lining manufacture method of ultramicropore carbon brick, also have: by abrasive dust raw material altogether form that (weight percent) graphite is 40～60%, silica flour is 25～35%, aluminum oxide powder is 10～15%, silica powder is 5～10% batchings, pack in the ball mill, the closure ball grinding machine is imported and exported and was ground preferred 4 hours altogether 3-5 hour.The effect of abrasive dust is to make the non-carbonaceous additive in the batching be able to fully merge with carbon altogether, helps taking place in the roasting process chemical reaction.
The non-carbonaceous additive that relates among the present invention, its effect is: the silica flour of adding and silica powder generate β-SiC needle-like crystal with base carbon generation chemical reaction in roasting process, hole diameter is diminished, thereby prevent that effectively molten iron from infiltrating; The aluminum oxide powder that adds absorbs the Na in the slag in the carbon brick use
2O-SiO
2Liquid phase forms the high β-Al of melt temperature
2O
3With sosoloid β-Al
2O
3-Na
2OAl
2O
32SiO
2(oblique side's potassium stone) forms protective layer at the brick fuel hot side, has prevented the corrosion of molten iron to brick fuel matrix.
The invention has the beneficial effects as follows,
1, owing to used effective additive, adopted common abrasive dust technology, make that additive is able to fully merge with carbon in the batching, help chemical reaction takes place in the roasting process, form little pore, the pore volume of brick fuel＜1 μ m is reached more than 80%; And the molten iron corrosion rate of brick fuel is reduced to below 20%.
2, owing to used a large amount of graphite in the aggregate, the thermal conductivity of brick fuel has been brought up to 20W/m.K (600 ℃), helps strengthening the cupola well cooling performance.
3, owing to selected for use the suitable maturing temperature and the residence time under the top temperature, make additive to play one's part to the full.
Embodiment:
Be described in further detail in conjunction with embodiment shown below:
Embodiment 1:
It is coal-tar pitch 20%, electric calcined anthracite 30%, graphite 10% that a kind of furnace lining ultramicropore carbon brick, its raw material are formed (weight percent), be total to abrasive dust is 40%; Altogether the abrasive dust raw material is formed (weight percent) for graphite is 60%, silica flour is 25%, aluminum oxide powder is 10%, silica powder is 5%.
Embodiment 2:
It is coal-tar pitch 25%, electric calcined anthracite 20%, graphite 20% that a kind of furnace lining ultramicropore carbon brick, its raw material are formed (weight percent), be total to abrasive dust is 35%; Altogether the abrasive dust raw material is formed (weight percent) for graphite is 40%, silica flour is 35%, aluminum oxide powder is 15%, silica powder is 10%.
Embodiment 3:
It is coal-tar pitch 23%, electric calcined anthracite 25%, graphite 15% that a kind of furnace lining ultramicropore carbon brick, its raw material are formed (weight percent), be total to abrasive dust is 37%; Altogether the abrasive dust raw material is formed (weight percent) for graphite is 50%, silica flour is 30%, aluminum oxide powder is 13%, silica powder is 7%.
Embodiment 4:
The furnace lining of the present invention manufacture method of ultramicropore carbon brick, according to the following steps:
(1). graphite is pulverized;
(2). screening: press the screening of the foregoing description raw material granularity;
(3). batching: press the foregoing description raw material and form (weight percent);
(4). mix and pinch;
(5). cool material;
(6). extrusion molding;
(7). roasting: 1200～1500 ℃ of temperature, the residence time under the top temperature is 10～20 hours;
(8). mechanical workout.
Embodiment 5:
Press the foregoing description abrasive dust raw material composition (weight percent) batching altogether, in the ball mill of packing into, the closure ball grinding machine is imported and exported and was ground altogether 4 hours.
The present invention is through implementing the tabulation of its physical and chemical index and like product contrast situation
| Sequence number | Index name | Unit | The ordinary blast carbon brick | Semi-graphite blast furnace carbon brick | Blast furnace micropore carbon brick | Furnace lining ultramicropore carbon brick |
| 1 | Ash content | ％ | ≤8 | ≤8 | ≤8 | |
| 2 | True density | g/cm 3 | ≥1.90 | ≥1.90 | ≥1.90 | |
| 3 | Volume density | g/cm 3 | ≥1.50 | ≥1.50 | ≥1.54 | ≥1.71 |
| 4 | Apparent porosity | ％ | ≤18.0 | ≤18 | ||
| 5 | True porosity | ％ | ≤20 | ≤20 | ||
| 6 | Compressive strength | MPa | ≥35 | ≥30 | ≥36.0 | ≥43 |
| 7 | Folding strength | MPa | ≥7.8 | ≥9.0 | ||
| 8 | Air penetrability | mDa | ≤11.0 | ≤0.05 | ||
| 9 | Oxidation ratio | ％ | ≤16.0 | ≤12 | ||
| 10 | Alkali-resistivity | Estimate | Very (LC) | Excellent (U) or good (LC) | Excellent (U) or good (LC) | Excellent (U) |
| 11 | Molten iron corrosion rate | ％ | 20 | |||
| 12 | Thermal conductivity room temperature 300 600 800 900 | W/m.K | ≥5.0 | ≥7 | ≥7.0 ≥9.0 ≥10.0 ≥12.0 | ≥20 |
| 13 | Average pore radius | ≤0.05 | ||||
| Less than 1 μ m pore volume | ≥80 |
Can find out that the pore volume of brick fuel＜1 μ m reaches more than 80% from table, the molten iron corrosion rate of brick fuel is reduced to below 20%.The thermal conductivity of brick fuel has been brought up to 20W/m.K (600 ℃), strengthens the cupola well cooling performance.
Claims (4)
1. it be binding agent 20～25%, electric calcined anthracite 20～30%, graphite 10～20%, common abrasive dust 35～40% that furnace lining ultramicropore carbon brick, its raw material are formed (weight percent); Described altogether abrasive dust raw material is formed (weight percent) for graphite is 40～60%, silica flour is 25～35%, aluminum oxide powder is 10～15%, silica powder 5～10%.
2. furnace lining ultramicropore carbon brick as claimed in claim 1 is characterized in that binding agent is a coal-tar pitch.
3. the furnace lining as claimed in claim 1 manufacture method of ultramicropore carbon brick, according to the following steps:
(1). graphite is pulverized;
(2). screening: press furnace lining and sieve with ultramicropore carbon brick raw material granularity;
(3). batching: forming (weight percent) binding agent 20～25%, graphite 10～20%, electric calcined anthracite 20～30%, be total to abrasive dust with ultramicropore carbon brick raw material by furnace lining is 35～40%; Described altogether abrasive dust raw material is formed (weight percent) for graphite is 40～60%, silica flour is 25～35%, aluminum oxide powder is 10～15%, silica powder 5～10%.
(4). mix and pinch;
(5). cool material;
(6). extrusion molding;
(7). roasting: 1200～1500 ℃ of temperature, the residence time under the top temperature is 10～20 hours;
(8). mechanical workout.
4. the furnace lining as claimed in claim 3 manufacture method of ultramicropore carbon brick also has:
By abrasive dust raw material altogether form that (weight percent) graphite is 40～60%, silica flour is 25～35%, aluminum oxide powder 10～15%, silica powder 5～10% batchings, in the ball mill of packing into, the closure ball grinding machine is imported and exported and was ground altogether 3-5 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100260876A CN1296318C (en) | 2004-04-15 | 2004-04-15 | Soper microporous carbon brick for furnace lining and its producing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100260876A CN1296318C (en) | 2004-04-15 | 2004-04-15 | Soper microporous carbon brick for furnace lining and its producing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1683279A CN1683279A (en) | 2005-10-19 |
| CN1296318C true CN1296318C (en) | 2007-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100260876A Expired - Fee Related CN1296318C (en) | 2004-04-15 | 2004-04-15 | Soper microporous carbon brick for furnace lining and its producing method |
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| Country | Link |
|---|---|
| CN (1) | CN1296318C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870898B (en) * | 2009-03-02 | 2013-03-20 | 山东省冶金设计院股份有限公司 | Special pressed carbon block for blast-furnace ironmaking as well as manufacturing and using methods thereof |
| CN102432316B (en) * | 2011-09-20 | 2013-07-24 | 武汉科技大学 | Carbon brick used for blast-furnace bottom hearth and its preparation method |
| 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 |
| CN102992805B (en) * | 2012-11-27 | 2014-12-10 | 方大炭素新材料科技股份有限公司 | High-thermal conductivity ultramicropore carbon brick and preparation method thereof |
| CN108585863B (en) * | 2018-05-04 | 2020-12-01 | 武汉科技大学 | High-strength ultramicropore electrically-calcined coal-based carbon brick and preparation method thereof |
| CN109456079B (en) * | 2018-12-29 | 2021-08-17 | 宁夏宁平炭素有限责任公司 | Preparation method of heat-preservation type microporous electric furnace carbon block for submerged arc furnace |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1104190A (en) * | 1993-12-25 | 1995-06-28 | 首钢总公司 | Spinel carbon brick and its making method |
| CN1108634A (en) * | 1994-08-25 | 1995-09-20 | 武汉钢铁(集团)公司 | Fired microporous carbon-aluminium brick |
| CN1290755A (en) * | 2000-10-18 | 2001-04-11 | 叶乐 | High corrosion resistant porous baked carbon brick for lining of blast furnace |
-
2004
- 2004-04-15 CN CNB2004100260876A patent/CN1296318C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1104190A (en) * | 1993-12-25 | 1995-06-28 | 首钢总公司 | Spinel carbon brick and its making method |
| CN1108634A (en) * | 1994-08-25 | 1995-09-20 | 武汉钢铁(集团)公司 | Fired microporous carbon-aluminium brick |
| CN1290755A (en) * | 2000-10-18 | 2001-04-11 | 叶乐 | High corrosion resistant porous baked carbon brick for lining of blast furnace |
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| Publication number | Publication date |
|---|---|
| CN1683279A (en) | 2005-10-19 |
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Address after: Hai Shi Zhen Honggu District 730084 Gansu city of Lanzhou province No. 354 Patentee after: Fangda Carbon New Materials Technology Co., Ltd. Address before: Hai Shi Zhen Honggu District 730084 Gansu city of Lanzhou province No. 354 Patentee before: Hailong New Material Science and Technology Co., Ltd., Lanzhou |
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Effective date of registration: 20151110 Address after: Hai Shi Zhen Honggu District 730084 Gansu city of Lanzhou province No. 354 Patentee after: Fangda Carbon New Materials Technology Co., Ltd. Address before: 100070, No. 188, No. fifteen, zone 9, South Fourth Ring Road, Beijing, Fengtai District [park] Patentee before: Beijing Fangda Carbon Technology Co Ltd |
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Granted publication date: 20070124 Termination date: 20160415 |