CN1176043C - Microporous corundum brick and its preparation method - Google Patents
Microporous corundum brick and its preparation method Download PDFInfo
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- CN1176043C CN1176043C CNB021392528A CN02139252A CN1176043C CN 1176043 C CN1176043 C CN 1176043C CN B021392528 A CNB021392528 A CN B021392528A CN 02139252 A CN02139252 A CN 02139252A CN 1176043 C CN1176043 C CN 1176043C
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- brick
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Abstract
The present invention relates to a microporous corundum brick and a preparation method thereof. The present invention is characterized in that the microporous corundum brick is prepared form the following raw materials according to the proportion by weight: 30 to 50% of compact corundum, 5 to 10% of mullite, 20 to 40% of ruby fused alumina, 5 to 10% of metallic silicon, 5 to 15% of silicon carbide, 2 to 8% of aluminium oxide (alpha-AL2O3) and 3 to 6% of resin. The microporous corundum brick of the present invention not only can satisfy the requirement of the long service life of a blast furnace, and can completely replace an imported product to be used as a ceramic cup at the area of a furnace hearth of the blast furnace. The microporous corundum brick includes three kinds of bricks which are tuyere combining bricks, iron notch combining bricks and slag notch combining bricks. The microporous corundum brick can be matched with small moulding carbon bricks for building a brick lining of the furnace hearth, and can be matched with large microporous carbon bricks for building the brick lining of the furnace hearth.
Description
(1) technical field
The present invention relates to a kind of refractory materials, relate to a kind of blast furnace hearth zone that is applicable to specifically, comprise State of Blast Furnace at the bottom of, the micropore corundum brick of furnace wall, air port, Tie Kou, cinder notch and preparation method thereof.
(2) background technology
The micropore corundum brick is applied in blast furnace hearth as the ceramic cup brick widely because of it has good alkali resistant, anti-slag, anti-iron aggressiveness.At present, quality surely belongs to the ceramic cup brick of France preferably in this type of brick, though domestic have many producers also at this type of refractory brick of Development and Production, but because of its alkali-resistivity and slag resistance can not show a candle to the import brick, do not possess microporeization, to such an extent as to domestic many enterprises have to spend the ceramic cup brick that higher cost is bought France in addition.
(3) summary of the invention
Purpose of the present invention provides a kind of not only have good alkali resistant, anti-slag, anti-iron aggressiveness at existing problem in the above-mentioned prior art just, and has micropore corundum brick of good microporeization and preparation method thereof.
Purpose of the present invention can adopt following measure to realize:
Micropore corundum brick of the present invention is to be prepared from by following raw material (weight ratio), compact alumina 30-50% wherein, mullite 5-10%, brown corundum 20-40%, Pure Silicon Metal 5-10%, silicon carbide 5-15%, aluminium sesquioxide (α-AL
2O
3) 2-8%, resin 3-6%.
The preparation method of micropore corundum brick of the present invention comprises following technological process:
A, compact alumina is ground into 20-35%, the granularity＜320 purpose 10-15% of (gross weight than) granularity 0.1-3mm; Brown alundum powder is broken into the particle that granularity is 1-3mm; Mullite is ground into granularity＜320 purpose fine powders; Metallic silicon power is broken into granularity＜320 purpose fine powders; Carborundum powder is broken into granularity＜200 purpose fine powders; Aluminium sesquioxide is ground into granularity＜600 purpose fine powders;
B, elder generation carry out mixed grind 1-3min with the raw material of granularity 〉=0.1mm as aggregate, add resin then and carry out mixed grind 3-5min; Compact alumina, mullite, Pure Silicon Metal, silicon carbide, aluminium sesquioxide fine powder with granularity＜0.1mm carries out common mill again, and mixed grind 5-10min is carried out in the fine powder adding after will grinding altogether then, can enter moulding, seasoning technical process afterwards;
C, when loading of kiln is carried out in the adobe behind the shaping and drying, at first adopt the coke grain that bottom, brick pond is paved, carry out loading of kiln afterwards again, and should keep somewhere the gap that is used for filling coke grain about 10mm between brick and the brick, should keep somewhere the gap that is used for filling coke grain about 50mm between brick and the brick pond pool wall, after fill in each kiln pond, cover the coke grain of 150mm left and right thickness more thereon, repaving the kiln sand that covers the 50mm left and right thickness at last can light a fire;
D, when firing temperature is risen to 1500 ℃ ± 50 ℃ by normal temperature after, enter insulating process, through 30-50h insulation, get final product kiln discharge behind the naturally cooling.
Product of the present invention after testing, its performance index have met or exceeded French imported product, see attached list.
As can be seen, the slag corrosion resistance of micropore corundum brick of the present invention reaches 3.43-6.06% from subordinate list, is much better than the ceramic cup brick that France produces; Its apparent porosity, compressive strength are better than the ceramic cup brick that France produces too; And its molten iron corrosion rate, thermal conductivity, alkali-resistivity also all can compare favourably with the ceramic cup brick that France produces; Also reached simultaneously little preferably pore index.
Product of the present invention not only can satisfy the requirement of blast furnace longevity, and substituting import one product fully, is used as blast furnace hearth zone ceramic cup, comprises air port, Tie Kou, cinder notch modular tile.Can cooperate with the little brick fuel of mold pressing and build brick lining by laying bricks or stones, also can cooperate and build brick lining by laying bricks or stones with bulk micropore carbon brick.
(4) embodiment
The present invention does a detailed description below with reference to embodiment:
Embodiment 1:
Present embodiment adopts following proportioning and processing step to realize:
A, compact alumina is ground into (gross weight than) granularity 0.1-3mm 30%, granularity＜320 purposes 10%; Brown alundum powder is broken into the particle that granularity is 1-3mm; Mullite is ground into granularity＜320 purpose fine powders; Metallic silicon power is broken into granularity＜320 purpose fine powders; Carborundum powder is broken into granularity＜200 purpose fine powders; Aluminium sesquioxide is ground into granularity＜600 purpose fine powders;
B, get granularity 〉=0.1mm compact alumina 30% by weight, brown corundum 32% carries out mixed grind 3min as aggregate, add resin resin 3% afterwards and carry out mixed grind 4min, again with compact alumina 10%, mullite 7%, Pure Silicon Metal 6%, silicon carbide 8%, the aluminium sesquioxide (α-AL of granularity＜0.1mm
2O
3) 4% fine powder carries out common mill, the fine powder after will grinding altogether then adds and carries out mixed grind 10min, and total mixed grind time of every dish material should be greater than 15min; Can enter moulding, seasoning technical process afterwards;
C, when the adobe behind the shaping and drying is adorned, at first adopt the coke grain that bottom, brick pond is paved, carry out loading of kiln afterwards again, and should keep somewhere the gap that 10mm is used for filling coke grain between brick and the brick, should keep somewhere the gap that 50mm is used for filling coke grain between brick and the brick pond pool wall, after fill in each kiln pond, cover the coke grain of 150mm thickness more thereon, repaving the kiln sand that covers 50mm thickness at last can light a fire;
D, after firing temperature rises to 1500 ℃ by normal temperature, enter insulating process, after 48h insulation, behind the naturally cooling, get final product kiln discharge.
Embodiment 2:
Present embodiment adopts following proportioning and processing step to realize:
A, compact alumina is ground into (gross weight than) granularity 0.1-3mm 27%, granularity＜320 purposes 13%; Brown alundum powder is broken into the particle that granularity is 1-3mm; Mullite is ground into granularity＜320 purpose fine powders; Metallic silicon power is broken into granularity＜320 purpose fine powders; Carborundum powder is broken into granularity＜200 purpose fine powders; Aluminium sesquioxide is ground into granularity＜600 purpose fine powders;
B, get granularity 〉=0.1mm compact alumina 27% by weight, brown corundum 28% carries out mixed grind 2min as aggregate, add resin 5% afterwards and carry out mixed grind 5min, again with compact alumina 13%, mullite 9%, Pure Silicon Metal 7%, silicon carbide 8%, the aluminium sesquioxide (α-AL of granularity＜0.1mm
2O
3) 3% fine powder carries out common mill, the fine powder after will grinding altogether then adds and carries out mixed grind 10min, and total mixed grind time of every dish material should be greater than 15min; Can enter moulding, seasoning technical process afterwards;
C, when loading of kiln is carried out in the adobe behind the shaping and drying, at first adopt the coke grain that bottom, brick pond is paved, carry out loading of kiln afterwards again, and should keep somewhere the gap that 10mm is used for filling coke grain between brick and the brick, should keep somewhere the gap that 50mm is used for filling coke grain between brick and the brick pond pool wall, after fill in each kiln pond, cover the coke grain of 150mm thickness more thereon, repaving the kiln sand that covers 50mm thickness at last can light a fire;
D, after firing temperature rises to 1500 ℃ by normal temperature, enter insulating process, after 48h insulation, behind the naturally cooling, get final product kiln discharge.
French pottery cup brick and micropore corundum brick performance comparison
| Sequence number | Project | Unit | The micropore corundum brick | French pottery cup brick | |||
| 1 # | 2 # | 3 # | |||||
| 1 | Al 2O 3 | ％ | 74.83 | 78.60 | 75.70 | / | |
| 2 | Fe 2O 3 | ％ | 0.62 | 0.65 | 0.75 | / | |
| 3 | Apparent porosity | ％ | 12.48 | 9.40 | 12.27 | 10.29 | |
| 4 | Volume density | g/cm 3 | 3.20 | 3.28 | 3.18 | 3.29 | |
| 5 | Compressive strength | MPa | 161.31 | 208.15 | 141.40 | 66.08 | |
| 6 | Gas permeability | mDa | 0.00 | 1.34 | 0.99 | 6.07 | |
| 7 | Molten iron corrosion index | ％ | 0.39 | 1.10 | 1.63 | 0.00 | |
| 8 | The slag action rate | ％ | 3.43 | 3.90 | 6.05 | 23.08 | |
| 9 | Mean pore size | μm | 0.269 | 0.238 | 0.250 | 0.175 | |
| 10 | ＜1 μ m pore volume | ％ | 74.03 | 72.60 | 76.23 | 95.33 | |
| 11 | Thermal conductivity | Room temperature | W/mK | 7.63 | 6.16 | 7.69 | 6.35 |
| 300℃ | 6.09 | 4.91 | 5.86 | 4.93 | |||
| 600℃ | 4.59 | 3.66 | 4.62 | 5.42 | |||
| 800℃ | 4.05 | 3.16 | 4.12 | 4.61 | |||
| 12 | Alkali-resistivity | Former compressive strength | MPa | 161.31 | 208.15 | 141.40 | 66.08 |
| Back compressive strength | MPa | 174.47 | 166.00 | 153.95 | 67.05 | ||
| Change rate of strength | ％ | +8.16 | -20.20 | +8.86 | +2.38 | ||
| Cubical expansivity | ％ | 6.24 | 5.09 | 10.83 | 5.84 | ||
| The sample outward appearance | Coarse flawless | Coarse flawless | Coarse flawless | Flawless | |||
| Estimate | Excellent (U) | Very (LC) | Excellent (U) | Excellent (U) | |||
Claims (2)
1, a kind of micropore corundum brick is characterized in that: it is that feedstock production by the following weight ratio forms, compact alumina 30-50% wherein, mullite 5-10%, brown corundum 20-40%, Pure Silicon Metal 5-10%, silicon carbide 5-15%, α-AL
2O
32-8%, resin 3-6%.
2, the preparation method of micropore corundum brick according to claim 1 is characterized in that: it comprises following technological process:
A, compact alumina is ground into (gross weight than) granularity 0.1-3mm 20-35%,＜320 purpose 10-15%; Brown alundum powder is broken into the particle that granularity is 1-3mm; Mullite is ground into granularity＜320 purpose fine powders; Metallic silicon power is broken into granularity＜320 purpose fine powders; Carborundum powder is broken into granularity＜200 purpose fine powders; α-AL
2O
3Be ground into granularity＜600 purpose fine powders;
B, elder generation carry out mixed grind 1-3min with the raw material of granularity 〉=0.1mm as aggregate, add resin then and carry out mixed grind 3-5min; Again with compact alumina, mullite, Pure Silicon Metal, silicon carbide, the α-AL of granularity＜0.1mm
2O
3Fine powder carries out common mill, and mixed grind 5-10min is carried out in the fine powder adding after will grinding altogether then, can enter moulding, seasoning technical process afterwards;
C, when loading of kiln is carried out in the adobe behind the shaping and drying, at first adopt the coke grain that bottom, brick pond is paved, carry out loading of kiln afterwards again, and should keep somewhere the gap that 10mm is used for filling coke grain between brick and the brick, should keep somewhere the gap that 50mm is used for filling coke grain between brick and the brick pond pool wall, after fill in each kiln pond, cover the coke grain of 150mm thickness more thereon, repaving the kiln sand that covers 50mm thickness at last can light a fire;
D, when firing temperature is risen to 1500 ℃ ± 50 ℃ by normal temperature after, enter insulating process, through 30-50h insulation, get final product kiln discharge behind the naturally cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021392528A CN1176043C (en) | 2002-11-06 | 2002-11-06 | Microporous corundum brick and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021392528A CN1176043C (en) | 2002-11-06 | 2002-11-06 | Microporous corundum brick and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1405119A CN1405119A (en) | 2003-03-26 |
| CN1176043C true CN1176043C (en) | 2004-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021392528A Expired - Fee Related CN1176043C (en) | 2002-11-06 | 2002-11-06 | Microporous corundum brick and its preparation method |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337987C (en) * | 2005-04-18 | 2007-09-19 | 宜兴市诺明高温耐火材料有限公司 | Mullite silicon carbide refractory material for production of dry coke and its production |
| CN1319895C (en) * | 2005-12-23 | 2007-06-06 | 郑州豫兴耐火材料有限公司 | Heat shock resistant refractory brick formed with slurry binding agent and production process thereof |
| CN100364931C (en) * | 2006-07-05 | 2008-01-30 | 鞍山浦项特种耐火材料有限公司 | Novel aluminum-zirconium-carbon slide brick for flow control in metallurgy industry |
| CN101823895B (en) * | 2010-05-05 | 2012-05-30 | 宜兴市丁山耐火器材有限公司 | Fire, wear and acid resistant clinkery brick and preparation method thereof |
| LU91767B1 (en) * | 2010-12-17 | 2012-06-18 | Wurth Paul Sa | Ceramic bottom lining of a blast furnace hearth |
| CN102432312B (en) * | 2011-09-13 | 2013-06-05 | 武汉科技大学 | Micro-porous mullite-silicon carbide multiphase fire resistant material and preparation method thereof |
| CN103936443A (en) * | 2014-04-03 | 2014-07-23 | 巩义市第五耐火材料总厂 | Novel micropore corundum brick and preparation method thereof |
| CN105254194A (en) * | 2015-09-16 | 2016-01-20 | 张云轩 | Manufacturing method for soil-imitated aggregated rock used as concrete aggregate |
| CN105272284B (en) * | 2015-09-30 | 2018-03-02 | 通达耐火技术股份有限公司 | A kind of large blast furnace type ceramic cup of TD I and preparation method thereof |
| CN107337457A (en) * | 2017-06-07 | 2017-11-10 | 董建军 | A kind of can-type calcine furnace mullite silicon-carbon refractory brick and preparation method thereof |
| CN109485441A (en) * | 2019-01-10 | 2019-03-19 | 明光瑞尔非金属材料有限公司 | A kind of blast furnace ceramic cup refractory material and preparation method thereof |
-
2002
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Owner name: GONGYI CITY NO.5, FIRE-RETARDANT MATERIAL GENERAL Free format text: FORMER OWNER: GONGYI CITY NO.5, FIRE-RETARDANT MATERIAL GENERAL FACTORY Effective date: 20051021 |
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Effective date of registration: 20051021 Address after: 451250 Beishan Town, Zhengzhou, Henan, Gongyi Co-patentee after: Wuhan Iron & Steel (Group) Co., Ltd. Patentee after: Gongyi City No.5, Fire-Retardant Material General Factory Address before: 451250 Beishan Town, Zhengzhou, Henan, Gongyi Patentee before: Gongyi City No.5, Fire-Retardant Material General Factory |
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