CN104086192B - A kind of light thermal-insulation calcium hexaluminate mould material - Google Patents
A kind of light thermal-insulation calcium hexaluminate mould material Download PDFInfo
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- CN104086192B CN104086192B CN201410305017.8A CN201410305017A CN104086192B CN 104086192 B CN104086192 B CN 104086192B CN 201410305017 A CN201410305017 A CN 201410305017A CN 104086192 B CN104086192 B CN 104086192B
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Abstract
The present invention relates to a kind of light thermal-insulation calcium hexaluminate mould material, comprise the raw material of following weight percent: particle diameter is 3 ~ 6? mm Ultralight calcium hexaluminate? 25 ~ 35%, does is particle diameter 1 ~ 3? the Ultralight calcium hexaluminate 10 ~ 15% of mm, does is particle diameter 0.088 ~ 1? the Ultralight calcium hexaluminate 15 ~ 20% of mm, particle diameter < 88? μm Ultralight calcium hexaluminate 0 ~ 25%, particle diameter < 88? μm corundum fine powder 0 ~ 25%, α-Al
2o
3micro mist 0 ~ 10%, and pure calcium aluminate cement 5 ~ 20%; Add the water reducer of 0.12 ~ 0.18% of above-mentioned raw materials gross weight outward.Light thermal-insulation calcium hexaluminate mould material volume density of the present invention is little, and thermal and insulating performance is good, and intensity is high, and foreign matter content is low, and refractoriness is high, and corrosion resistance is strong.
Description
Technical field
The present invention relates to a kind of light thermal-insulation calcium hexaluminate mould material, belong to technical field of refractory materials.
Background technology
Traditional ladle liner material mostly adopts Al2O3MgOC Bricks, magnesia carbon brick is built by laying bricks or stones.Because Al2O3MgOC Bricks, magnesia carbon brick carbon content are high, its thermal conductivity coefficient is large, box hat temperature can be caused too high, box hat is easily caused to occur distortion and cracking, more seriously, molten steel temperature drop also can be caused too fast, be unfavorable for external refining continue carry out, this just needs permanent ladle layer to have good heat insulating effect.Traditional permanent ladle layer lagging material many employings diatomite brick, asbestos brick, vermiculite brick, light weight fireclay brick, light mullite brick or half lightweight, light weight alumina matter mould material etc.This kind of material poor thermal insulation property, intensity is low, foreign matter content is high, refractoriness is low, once ladle working lining material is fallen by molten steel or slag corrosion, the permanent layer of low refractoriness will be fallen by melting loss in the short period of time, thus causes ladle to occur bleed-out, easily occurs security incident.
Summary of the invention
For solving the problem, the object of the present invention is to provide a kind of light thermal-insulation calcium hexaluminate mould material, volume density is little, and thermal and insulating performance is good, and intensity is high, and foreign matter content is low, and refractoriness is high, and corrosion resistance is strong.
To achieve these goals, the technical solution used in the present invention is:
A kind of light thermal-insulation calcium hexaluminate mould material, comprises the raw material of following weight percent:
Particle diameter is 3 ~ 6 mm Ultralight calcium hexaluminates 25 ~ 35%,
Particle diameter is the Ultralight calcium hexaluminate 10 ~ 15% of 1 ~ 3 mm,
Particle diameter is the Ultralight calcium hexaluminate 15 ~ 20% of 0.088 ~ 1 mm,
The Ultralight calcium hexaluminate 0 ~ 25% of particle diameter < 88 μm,
The corundum fine powder 0 ~ 25% that particle diameter < is 88 μm,
α-Al
2o
3micro mist 0 ~ 10%, and
Pure calcium aluminate cement 5 ~ 20%;
Add the water reducer of 0.12 ~ 0.18% of above-mentioned raw materials gross weight outward.
According to above-mentioned light thermal-insulation calcium hexaluminate mould material, described Ultralight calcium hexaluminate tap density is 0.4 ~ 0.5 g/cm
3.
According to above-mentioned light thermal-insulation calcium hexaluminate mould material, Al in described corundum fine powder
2o
3mass content is Al
2o
3>=95%.
According to above-mentioned light thermal-insulation calcium hexaluminate mould material, described α-Al
2o
3al in micro mist
2o
3mass content is Al
2o
3>=97%, particle diameter≤5 μm.
According to above-mentioned light thermal-insulation calcium hexaluminate mould material, Al in described pure calcium aluminate cement
2o
3mass content is Al
2o
3>=70%.
According to above-mentioned light thermal-insulation calcium hexaluminate mould material, described water reducer is the one in tripoly phosphate sodium STPP or Sodium hexametaphosphate 99.
According to above-mentioned light thermal-insulation calcium hexaluminate mould material, the preparation method of described mould material is: by described various raw material mixing, add the water of compound 8 ~ 12 wt%, stir, vibratory compaction, the demoulding after base substrate after shaping at room temperature maintenance 20 ~ 26 h, at 120 ~ 140 DEG C, dry 12 ~ 24 h, to obtain final product.
the positive beneficial effect of the present invention
High (CaO and Al of mould material chemical purity of the present invention
2o
3mass content >95%), the thing at high temperature reacting generation is high-melting-point phase mutually, according to different proportionings, its thing is calcium hexaluminate (fusing point is 1903 DEG C) and corundum phase (fusing point is 2050 DEG C) mutually, or be all calcium hexaluminate, therefore, it has higher intensity, good resistance to fouling and security.
It is main raw material that mould material of the present invention have employed a kind of Ultralight calcium hexaluminate aggregate, and its tap density is only 0.4 ~ 0.5 g/cm
3, little (0.22 ~ 0.35 g/cm of volume density of prepared mould material
3), good heat insulating.
Mould material of the present invention can improve the safety coefficient of ladle greatly, when steel ladle working layer refractory materials all corrodes complete, this material can also resist the erosion of 1-2 stove molten steel, avoid traditional permanent layer lagging material just has bleed-out risk once contact molten steel, and work-ing life is also significantly increased, be the 3-4 in traditional high alumina castable work-ing life doubly.
Embodiment
Below in conjunction with some specific embodiments, the present invention is further described.
Embodiment 1
A kind of light thermal-insulation calcium hexaluminate mould material, comprises the raw material of following weight percent:
Particle diameter is 3 ~ 6 mm Ultralight calcium hexaluminates 25%,
Particle diameter is the Ultralight calcium hexaluminate 10% of 1 ~ 3 mm,
Particle diameter is the Ultralight calcium hexaluminate 20% of 0.088 ~ 1 mm,
The Ultralight calcium hexaluminate 10% of particle diameter < 88 μm
The corundum fine powder 15% that particle diameter < is 88 μm,
α-Al
2o
3micro mist 10%, and
Pure calcium aluminate cement 10%;
Add the tripoly phosphate sodium STPP of 0.12% of above-mentioned raw materials gross weight outward.
The performance test results is in table 1.
Embodiment 2
A kind of light thermal-insulation calcium hexaluminate mould material, comprises the raw material of following weight percent:
Particle diameter is 3 ~ 6 mm Ultralight calcium hexaluminates 30%,
Particle diameter is the Ultralight calcium hexaluminate 14% of 1 ~ 3 mm,
Particle diameter is the Ultralight calcium hexaluminate 17% of 0.088 ~ 1 mm,
The Ultralight calcium hexaluminate 21% of particle diameter < 88 μm,
The corundum fine powder 10% that particle diameter < is 88 μm,
α-Al
2o
3micro mist 3%, and
Pure calcium aluminate cement 5%;
Add the tripoly phosphate sodium STPP of 0.16% of above-mentioned raw materials gross weight outward.
The performance test results is in table 1.
Embodiment 3
A kind of light thermal-insulation calcium hexaluminate mould material, comprises the raw material of following weight percent:
Particle diameter is 3 ~ 6 mm Ultralight calcium hexaluminates 35%,
Particle diameter is the Ultralight calcium hexaluminate 15% of 1 ~ 3 mm,
Particle diameter is the Ultralight calcium hexaluminate 15% of 0.088 ~ 1 mm,
The Ultralight calcium hexaluminate 10% of particle diameter < 88 μm,
The corundum fine powder 10% that particle diameter < is 88 μm,
α-Al
2o
3micro mist 5%, and
Pure calcium aluminate cement 10%,
Add the tripoly phosphate sodium STPP of 0.18% of above-mentioned raw materials gross weight outward.
Embodiment 4
A kind of light thermal-insulation calcium hexaluminate mould material, comprises the raw material of following weight percent:
Particle diameter is 3 ~ 6 mm Ultralight calcium hexaluminates 30%,
Particle diameter is the Ultralight calcium hexaluminate 15% of 1 ~ 3 mm,
Particle diameter is the Ultralight calcium hexaluminate 15% of 0.088 ~ 1 mm,
The corundum fine powder 20% that particle diameter < is 88 μm,
α-Al
2o
3micro mist 5%, and
Pure calcium aluminate cement 15%;
Add the Sodium hexametaphosphate 99 of 0.13% of above-mentioned raw materials gross weight outward.
The performance test results is in table 1.
Embodiment 5
A kind of light thermal-insulation calcium hexaluminate mould material, comprises the raw material of following weight percent:
Particle diameter is 3 ~ 6 mm Ultralight calcium hexaluminates 25%,
Particle diameter is the Ultralight calcium hexaluminate 12% of 1 ~ 3 mm,
Particle diameter is the Ultralight calcium hexaluminate 18% of 0.088 ~ 1 mm,
The Ultralight calcium hexaluminate 20% of particle diameter < 88 μm,
The corundum fine powder 5% that particle diameter < is 88 μm, and
Pure calcium aluminate cement 20%;
Add the Sodium hexametaphosphate 99 of 0.15% of above-mentioned raw materials gross weight outward.
The performance test results is in table 1.
Embodiment 6
A kind of light thermal-insulation calcium hexaluminate mould material, comprises the raw material of following weight percent:
Particle diameter is 3 ~ 6 mm Ultralight calcium hexaluminates 35%,
Particle diameter is the Ultralight calcium hexaluminate 10% of 1 ~ 3 mm,
Particle diameter is the Ultralight calcium hexaluminate 15% of 0.088 ~ 1 mm,
The corundum fine powder 20% that particle diameter < is 88 μm, and
Pure calcium aluminate cement 20%;
Add the Sodium hexametaphosphate 99 of 0.14% of above-mentioned raw materials gross weight outward.
The performance test results is in table 1.
Embodiment 7
A kind of light thermal-insulation calcium hexaluminate mould material, comprises the raw material of following weight percent:
Particle diameter is 3 ~ 6 mm Ultralight calcium hexaluminates 30%,
Particle diameter is the Ultralight calcium hexaluminate 10% of 1 ~ 3 mm,
Particle diameter is the Ultralight calcium hexaluminate 18% of 0.088 ~ 1 mm,
The Ultralight calcium hexaluminate 22% of particle diameter < 88 μm,
α-Al
2o
3micro mist 10%, and
Pure calcium aluminate cement 10%;
Add the Sodium hexametaphosphate 99 of 0.17% of above-mentioned raw materials gross weight outward.
The performance test results is in table 1.
Embodiment 8
A kind of light thermal-insulation calcium hexaluminate mould material, comprises the raw material of following weight percent:
Particle diameter is 3 ~ 6 mm Ultralight calcium hexaluminates 35%,
Particle diameter is the Ultralight calcium hexaluminate 10% of 1 ~ 3 mm,
Particle diameter is the Ultralight calcium hexaluminate 15% of 0.088 ~ 1 mm,
The Ultralight calcium hexaluminate 15% of particle diameter < 88 μm,
α-Al
2o
3micro mist 8%, and
Pure calcium aluminate cement 17%,
Add the tripoly phosphate sodium STPP of 0.13% of above-mentioned raw materials gross weight outward.
The performance test results is in table 1.
Embodiment 9
A kind of light thermal-insulation calcium hexaluminate mould material, comprises the raw material of following weight percent:
Particle diameter is 3 ~ 6 mm Ultralight calcium hexaluminates 30%,
Particle diameter is the Ultralight calcium hexaluminate 14% of 1 ~ 3 mm,
Particle diameter is the Ultralight calcium hexaluminate 16% of 0.088 ~ 1 mm,
The Ultralight calcium hexaluminate 25% of particle diameter < 88 μm, and
Pure calcium aluminate cement 15%;
Add the tripoly phosphate sodium STPP of 0.16% of above-mentioned raw materials gross weight outward.
The performance test results is in table 1.
The preparation method of the light thermal-insulation calcium hexaluminate mould material that one of above-described embodiment 1 ~ 9 is described is arbitrarily:
Mixed by described various raw material by the weight percent of above-described embodiment, add the water of compound 8 ~ 12 wt%, stir, vibratory compaction, the demoulding after the at room temperature maintenance 20 ~ 26 of the base substrate after shaping h, at 120 ~ 140 DEG C, dry 12 ~ 24 h, to obtain final product.
Light thermal-insulation calcium hexaluminate mould material the performance test results described in table 1 embodiment 1 ~ 9
。
Claims (6)
1. a light thermal-insulation calcium hexaluminate mould material, is characterized in that, comprises the raw material of following weight percent:
Particle diameter is 3 ~ 6 mm Ultralight calcium hexaluminates 25 ~ 35%,
Particle diameter is the Ultralight calcium hexaluminate 10 ~ 15% of 1 ~ 3 mm,
Particle diameter is the Ultralight calcium hexaluminate 15 ~ 20% of 0.088 ~ 1 mm,
The Ultralight calcium hexaluminate 0 ~ 25% of particle diameter < 88 μm,
The corundum fine powder 0 ~ 25% that particle diameter < is 88 μm,
α-Al
2o
3micro mist 0 ~ 10%, and
Pure calcium aluminate cement 5 ~ 20%;
Add the water reducer of above-mentioned raw materials gross weight 0.12 ~ 0.18% outward;
The tap density of described Ultralight calcium hexaluminate is 0.4 ~ 0.5 g/cm
3.
2. light thermal-insulation calcium hexaluminate mould material according to claim 1, is characterized in that, Al in described corundum fine powder
2o
3mass content is Al
2o
3>=95%.
3. light thermal-insulation calcium hexaluminate mould material according to claim 1, is characterized in that, described α-Al
2o
3al in micro mist
2o
3mass content is Al
2o
3>=97%, particle diameter≤5 μm.
4. light thermal-insulation calcium hexaluminate mould material according to claim 1, is characterized in that, Al in described pure calcium aluminate cement
2o
3mass content is Al
2o
3>=70%.
5. light thermal-insulation calcium hexaluminate mould material according to claim 1, is characterized in that, described water reducer is the one in tripoly phosphate sodium STPP or Sodium hexametaphosphate 99.
6. light thermal-insulation calcium hexaluminate mould material according to claim 1, it is characterized in that, the preparation method of described mould material is: by described various raw material mixing, add the water of compound 8 ~ 12 wt%, stir, vibratory compaction, the demoulding after the at room temperature maintenance 20 ~ 26 of the base substrate after shaping h, at 120 ~ 140 DEG C, dry 12 ~ 24 h, to obtain final product.
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| CN104086192B true CN104086192B (en) | 2015-10-28 |
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| KR102363212B1 (en) * | 2016-04-01 | 2022-02-14 | 덴카 주식회사 | Aggregate for refractory materials, manufacturing method thereof, and refractory materials using same |
| CN107759234A (en) * | 2016-08-19 | 2018-03-06 | 张丽媛 | A kind of castable refractory |
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| CN111099904B (en) * | 2019-12-31 | 2022-08-30 | 宜兴摩根热陶瓷有限公司 | Alkaline calcium hexaluminate light heat-insulating material and preparation method thereof |
| CN111187089A (en) * | 2020-03-03 | 2020-05-22 | 无锡市天寅耐火材料有限公司 | Calcium dialuminate non-stick aluminum castable |
| CN111892396A (en) * | 2020-08-20 | 2020-11-06 | 无锡市天寅耐火材料有限公司 | Calcium hexaluminate castable not sticky to aluminum |
| CN114874003A (en) * | 2022-06-10 | 2022-08-09 | 武汉钢铁有限公司 | Low-heat-conduction steel ladle permanent layer castable containing calcium hexaluminate |
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| CN102211945A (en) * | 2010-04-08 | 2011-10-12 | 常州瑞复达高温新材料有限公司 | Calcium hexaluminate based pouring material not polluting high-purity aluminum solution |
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2014
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211945A (en) * | 2010-04-08 | 2011-10-12 | 常州瑞复达高温新材料有限公司 | Calcium hexaluminate based pouring material not polluting high-purity aluminum solution |
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Application publication date: 20141008 Assignee: Henan bamboo Qingzhou Refractories Co. Assignor: Henan bamboo grove Nai Cai Co., Ltd Contract record no.: 2016410000007 Denomination of invention: Lightweight insulated calcium hexaluminate castable Granted publication date: 20151028 License type: Exclusive License Record date: 20160517 |
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Effective date of registration: 20160928 Address after: Bamboo town Gongyi City Shunhe street 451255 Henan city of Zhengzhou province No. 165 Patentee after: Henan bamboo Qingzhou Refractories Co. Address before: 451255 bamboo grove Town, Zhengzhou City, Henan Province, Gongyi Patentee before: Henan bamboo grove Nai Cai Co., Ltd |