CN104387096A - Corundum spinel unburned brick for smelting steel ladle and preparation method of corundum spinel unburned brick - Google Patents
Corundum spinel unburned brick for smelting steel ladle and preparation method of corundum spinel unburned brick Download PDFInfo
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- CN104387096A CN104387096A CN201410607987.3A CN201410607987A CN104387096A CN 104387096 A CN104387096 A CN 104387096A CN 201410607987 A CN201410607987 A CN 201410607987A CN 104387096 A CN104387096 A CN 104387096A
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Abstract
The invention relates to a corundum spinel unburned brick for smelting steel ladles and a preparation method of the corundum spinel unburned brick. The corundum spinel unburned brick is prepared from the following raw materials in percentage by weight: 75-85% of corundum, 3.5-7% of magnesite, 5-10% of alpha-Al2O3, 0.5-2% of silica powder, 0.5-1% of a water reducing agent and 0.5-6% of a binding agent. Compared with the prior art, the preparation method has the advantages that the normal temperature strength of the corundum spinel unburned brick is improved as a halogen piece solution is adopted as a binding agent; the halogen piece mainly comprises MgC12.6H2O and can be decomposed into MgO at about 550 DEG C, no impurities are introduced into a brick blank, MgO generated when the halogen piece is decomposed, together with corundum powder or Al2O3 micro powder, can form tiny spinel which is uniformly distributed, and therefore spinel formation of the brick blank is facilitated, the brick blank has certain minimum inflation, the security of steel ladle operation is improved, spinel formation of the brick blank is uniform, the impurity content is low, and the thermal shock resistance, the structural peeling resistance and the slag invasion resistance of the brick blank are all greatly improved.
Description
Technical field
The present invention relates to technical field of refractory materials, particularly one smelts ladle corundum spinelle green brick and preparation method thereof.
Background technology
In recent years, along with the domestic and international demand to soft steel or even ultra low-carbon steel constantly increases, therefore a lot of steel enterprise also requires that the refining ladle part that some produce special steel prohibits the use the refractory materials of carbon containing with this to reach the manufacturing requirements of soft steel and ultra low-carbon steel, and corundum spinelle goods arise at the historic moment thus.
In the market, the bonding agent of traditional corundum spinelle goods adopts ρ-Al
2o
3be combined with silicon powder composite micro-powder, or adopt pure calcium aluminate cement to combine; Wherein adopt micropowder bonded raw materials cost higher, and baking with burn till before low strength, although and to adopt pure calcium aluminate cement to combine normal temperature strength very large, middle hot strength and the erosion-resisting characteristics of corundum spinelle goods will be had influence on.
In order to overcome the problems referred to above, the present invention proposes good smelting ladle corundum spinelle green brick of a kind of heat-resistant knocking stability, resistive connection structure spalling and resistance to slag corrosion and preparation method thereof.
Summary of the invention
Instant invention overcomes above-mentioned the deficiencies in the prior art, provide good smelting ladle corundum spinelle green brick of a kind of heat-resistant knocking stability, resistive connection structure spalling and resistance to slag corrosion and preparation method thereof.
Technical scheme of the present invention is achieved in that
The corundum spinelle green brick of a kind of smelting ladle, the constitutive material components by weight percentage of this mould material is:
Described corundum is made up of plate diamond spar and fused white corundum, and the size composition of corundum is 12 ~ 8mm, 8 ~ 5mm, 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm, <0.088mm six kinds of specifications, and the Al in corundum
2o
3weight percent>=90%; Described magnesia is electrosmelted magnesite clinker, and its size composition is 1-0mm, and MgO weight percent>=3.5% wherein; Described α-Al
2o
3for alumina powder, its granularity is 1 ц m; Described water reducer is the mixing of one or several arbitrary proportions in FDN, ADS and ADW; Described bonding agent is main component is MgCl
26H
2the halogen sheet of O.
The present invention makees bonding agent by adopting halogen sheet solution, not only effectively raise the normal temperature strength of corundum spinelle green brick, and halogen sheet main component is MgCl
26H
2o, can decompose under about 550 DEG C generate MgO, impurity can not be introduced to adobe, and halogen sheet decompose generate MgO adobe use in can well with lapis amiridis or Al
2o
3micro mist forms some trickle spinels be evenly distributed, be conducive to the spinel of whole adobe, adobe is made to have certain microdilatancy, security during improve ladle running, and adobe spinel is more even, foreign matter content is low, and the heat-resistant knocking stability of adobe, resistive connection structure spalling and anti-scour property are greatly improved.Described water reducer reduces amount of water, and reducing that void content also has is exactly increase pouring material to add water the dispersiveness stirred, and wherein FDN is high efficiency composition water reducer, and main component is beta-naphthalenesulfonic-acid formaldehyde condensation compound, and its water-reducing rate is high, can increase substantially the intensity of mould material; Dispersed alumina ADS and ADW can be widely used in corundum castable and goods.
Smelt a preparation method for ladle corundum spinelle green brick, comprise the following steps:
(1) system material: block magnesia is carried out Mechanical Crushing through jaw crusher, oppositely rolling roller crusher, cone crusher successively, after sieved through sieve, makes the magnesia that granularity is 1 ~ 0mm specification;
(2) prepare burden: according to the proportion relation of described each constitutive material, configure corundum 75 ~ 85%, magnesia 3.5 ~ 7%, α-Al respectively
2o
35 ~ 10%, silicon powder 0.5 ~ 2%, water reducer 0.5 ~ 1%, its order of addition(of ingredients) first adds the aggregate that granularity is 12 ~ 8mm, 8 ~ 5mm, 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm, then add fine powder, α-Al
2o
3, silicon powder and water reducer Preblend, make siccative work in-process;
(3) batch mixing: by the raw material prepared send into mixer mix, add halogen sheet solution after mixing 3 ~ 5 minutes, batch mixing total time >=10 minutes;
(4) shaping: the batch mixing mixed is added in mould, carry out building shaping;
(5) maintenance: the demoulding natural curing after 4 hours of the sample after shaping, its curing time is 12 hours;
(6) dry: adobe maintenance completed is sent in kiln and toasted;
(7) pack: test after kiln discharge and pack.
The present invention is also through scientific and reasonable batching and thermal treatment process, the corundum spinelle green brick anti-thermal shock of preparation is stable, slag corrosion resistance and heat resistanceheat resistant is peeled off, structure spalling excellent property, high life, can be applicable to produce on the special smelting such as soft steel, ultra low-carbon steel ladle well.
Have employed the invention has the beneficial effects as follows of technique scheme:
The present invention relates to good smelting ladle corundum spinelle green brick of a kind of heat-resistant knocking stability, resistive connection structure spalling and resistance to slag corrosion and preparation method thereof.The present invention makees bonding agent by adopting halogen sheet solution, not only effectively raise the normal temperature strength of corundum spinelle green brick, and halogen sheet main component is MgCl
26H
2o, can decompose under about 550 DEG C generate MgO, impurity can not be introduced to adobe, and halogen sheet decompose generate MgO adobe use in can well with lapis amiridis or Al
2o
3micro mist forms some trickle spinels be evenly distributed, be conducive to the spinel of whole adobe, adobe is made to have certain microdilatancy, security during improve ladle running, and adobe spinel is more even, foreign matter content is low, and the heat-resistant knocking stability of adobe, resistive connection structure spalling and anti-scour property are greatly improved.
The present invention is also through scientific and reasonable batching and thermal treatment process, the corundum spinelle green brick anti-thermal shock of preparation is stable, slag corrosion resistance and heat resistanceheat resistant is peeled off, structure spalling excellent property, high life, can be applicable to produce on the special smelting such as soft steel, ultra low-carbon steel ladle well.
Embodiment
The specific embodiment of the present invention is as follows:
Embodiment 1: a kind of smelting ladle corundum spinelle green brick, the constitutive material components by weight percentage of this mould material is:
Described corundum is made up of plate diamond spar and fused white corundum, and the size composition of corundum is 12 ~ 8mm, 8 ~ 5mm, 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm, <0.088mm six kinds of specifications, and the Al in corundum
2o
3weight percent 90%; Described magnesia is electrosmelted magnesite clinker, and its size composition is 1-0mm, and MgO weight percent 3.5% wherein; Described α-Al
2o
3for alumina powder, its granularity is 1 ц m; Described water reducer is FDN; Described bonding agent is main component is MgCl
26H
2the halogen sheet of O.
Smelt a preparation method for ladle corundum spinelle green brick, comprise the following steps:
(1) system material: block magnesia is carried out Mechanical Crushing through jaw crusher, oppositely rolling roller crusher, cone crusher successively, after sieved through sieve, makes the magnesia that granularity is 1 ~ 0mm specification;
(2) prepare burden: according to the proportion relation of described each constitutive material, configure corundum 82.7%, magnesia 5%, α-Al respectively
2o
310%, silicon powder 1%, water reducer 0.8%, its order of addition(of ingredients) first adds the aggregate that granularity is 12 ~ 8mm, 8 ~ 5mm, 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm, then add fine powder, α-Al
2o
3, silicon powder and water reducer Preblend, make siccative work in-process;
(3) batch mixing: the raw material prepared is sent into mixer and mixes, add halogen sheet solution 0.5% after mixing 4 minutes as bonding agent, external adding water 4.5%, 10 minutes total times of batch mixing;
(4) shaping: the batch mixing mixed is added in mould, carry out building shaping;
(5) maintenance: the demoulding natural curing after 4 hours of the sample after shaping, its curing time is 12 hours;
(6) dry: adobe maintenance completed is sent in kiln and toasted;
(7) pack: test after kiln discharge and pack.
The index of the mould material of employing prepared by embodiment 1 is:
| Index | Embodiment 1 |
| Heat-shock resistance/time (1100 DEG C, water-cooled) | 14 |
| High temperature break resistant intensity/Mpa (1400 DEG C, 3h) | 13.2 |
| Permanent line change/% (1500 DEG C, 3h) | +0.21 |
Embodiment 2: a kind of smelting ladle corundum spinelle green brick, the constitutive material components by weight percentage of this mould material is:
Described corundum is made up of plate diamond spar and fused white corundum, and the size composition of corundum is 12 ~ 8mm, 8 ~ 5mm, 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm, <0.088mm six kinds of specifications, and the Al in corundum
2o
3weight percent 90%; Described magnesia is electrosmelted magnesite clinker, and its size composition is 1-0mm, and MgO weight percent 3.5% wherein; Described α-Al
2o
3for alumina powder, its granularity is 1 ц m; Described water reducer is FDN; Described bonding agent is main component is MgCl
26H
2the halogen sheet of O.
Smelt a preparation method for ladle corundum spinelle green brick, comprise the following steps:
(1) system material: block magnesia is carried out Mechanical Crushing through jaw crusher, oppositely rolling roller crusher, cone crusher successively, after sieved through sieve, makes the magnesia that granularity is 1 ~ 0mm specification;
(2) prepare burden: according to the proportion relation of described each constitutive material, configure corundum 80.2%, magnesia 5%, α-Al respectively
2o
310%, silicon powder 1%, water reducer 0.8%, its order of addition(of ingredients) first adds the aggregate that granularity is 12 ~ 8mm, 8 ~ 5mm, 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm, then add fine powder, α-Al
2o
3, silicon powder and water reducer Preblend, make siccative work in-process;
(3) batch mixing: the raw material prepared is sent into mixer and mixes, add halogen sheet solution 3% after mixing 4 minutes as bonding agent, external adding water 4.5%, 10 minutes total times of batch mixing;
(4) shaping: the batch mixing mixed is added in mould, carry out building shaping;
(5) maintenance: the demoulding natural curing after 4 hours of the sample after shaping, its curing time is 12 hours;
(6) dry: adobe maintenance completed is sent in kiln and toasted;
(7) pack: test after kiln discharge and pack.
The index of the mould material of employing prepared by embodiment 2 is:
| Index | Embodiment 2 |
| Heat-shock resistance/time (1100 DEG C, water-cooled) | 17 |
| High temperature break resistant intensity/Mpa (1400 DEG C, 3h) | 21 |
| Permanent line change/% (1500 DEG C, 3h) | +0.42 |
Embodiment 3: a kind of smelting ladle corundum spinelle green brick, the constitutive material components by weight percentage of this mould material is:
Described corundum is made up of plate diamond spar and fused white corundum, and the size composition of corundum is 12 ~ 8mm, 8 ~ 5mm, 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm, <0.088mm six kinds of specifications, and the Al in corundum
2o
3weight percent 90%; Described magnesia is electrosmelted magnesite clinker, and its size composition is 1-0mm, and MgO weight percent 3.5% wherein; Described α-Al
2o
3for alumina powder, its granularity is 1 ц m; Described water reducer is FDN; Described bonding agent is main component is MgCl
26H
2the halogen sheet of O.
Smelt a preparation method for ladle corundum spinelle green brick, comprise the following steps:
(1) system material: block magnesia is carried out Mechanical Crushing through jaw crusher, oppositely rolling roller crusher, cone crusher successively, after sieved through sieve, makes the magnesia that granularity is 1 ~ 0mm specification;
(2) prepare burden: according to the proportion relation of described each constitutive material, configure corundum 77.2%, magnesia 5%, α-Al respectively
2o
310%, silicon powder 1%, water reducer 0.8%, its order of addition(of ingredients) first adds the aggregate that granularity is 12 ~ 8mm, 8 ~ 5mm, 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm, then add fine powder, α-Al
2o
3, silicon powder and water reducer Preblend, make siccative work in-process;
(3) batch mixing: the raw material prepared is sent into mixer and mixes, add halogen sheet solution 6% after mixing 4 minutes as bonding agent, external adding water 4.5%, 10 minutes total times of batch mixing;
(6) shaping: the batch mixing mixed is added in mould, carry out building shaping;
(7) maintenance: the demoulding natural curing after 4 hours of the sample after shaping, its curing time is 12 hours;
(6) dry: adobe maintenance completed is sent in kiln and toasted;
(7) pack: test after kiln discharge and pack.
The index of the mould material of employing prepared by embodiment 3 is:
| Index | Embodiment 3 |
| Heat-shock resistance/time (1100 DEG C, water-cooled) | 18 |
| High temperature break resistant intensity/Mpa (1400 DEG C, 3h) | 22.3 |
| Permanent line change/% (1500 DEG C, 3h) | +0.58 |
Heat-shock resistance:
High Temperature Furnaces Heating Apparatus preheated to 1100 ± 10 DEG C and after being incubated 15min, rapidly sample moved in burner hearth, after insulation 20min, rapidly sample being immersed in 5 ~ 35 DEG C of flowing waters, take out immediately after quick refrigeration 3min, be no less than 5min storage period in atmosphere.Then sample is put into stove again, repeat said process, until large crackle appears in sample, till experiment can not be continued, record experiment number.Each formula needs 3 samples, and averages.
High temperature break resistant intensity:
Sample is put into High Temperature Furnaces Heating Apparatus, is heated to 1400 DEG C under air atmosphere and is incubated 3 hours, then test specimens folding strength.Each formula needs 3 samples, and averages.
Permanent line changes:
Measure specimen length, then sample is put into High Temperature Furnaces Heating Apparatus and be heated to 1500 DEG C and be incubated 3 hours, sample cooling epiphysiometer length in stove, show that sample is in 1500 DEG C of heating permanent line change after 3 hours.Each formula needs 3 samples, and averages.
Claims (2)
1. smelt a ladle corundum spinelle green brick, it is characterized in that: its constitutive material components by weight percentage is:
Described corundum is made up of plate diamond spar and fused white corundum, and the size composition of corundum is 12 ~ 8mm, 8 ~ 5mm, 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm, <0.088mm six kinds of specifications, and the Al in corundum
2o
3weight percent>=90%; Described magnesia is electrosmelted magnesite clinker, and its size composition is 1-0mm, and MgO weight percent>=3.5% wherein; Described α-Al
2o
3for alumina powder, its granularity is 1 ц m; Described water reducer is the mixing of one or several arbitrary proportions in FDN, ADS and ADW; Described bonding agent is main component is MgCl
26H
2the halogen sheet of O.
2. smelt a preparation method for ladle corundum spinelle green brick, it is characterized in that comprising the following steps:
(1) system material: block magnesia is carried out Mechanical Crushing through jaw crusher, oppositely rolling roller crusher, cone crusher successively, after sieved through sieve, makes the magnesia that granularity is 1 ~ 0mm specification;
(2) prepare burden: according to the proportion relation of described each constitutive material, configure corundum 75 ~ 85%, magnesia 3.5 ~ 7%, α-Al respectively
2o
35 ~ 10%, silicon powder 0.5 ~ 2%, water reducer 0.5 ~ 1%, its order of addition(of ingredients) first adds the aggregate that granularity is 12 ~ 8mm, 8 ~ 5mm, 5 ~ 3mm, 3 ~ 1mm, 1 ~ 0mm, then add fine powder, α-Al
2o
3, silicon powder and water reducer Preblend, make siccative work in-process;
(3) batch mixing: by the raw material prepared send into mixer mix, add halogen sheet solution after mixing 3 ~ 5 minutes, batch mixing total time >=10 minutes;
(4) shaping: the batch mixing mixed is added in mould, carry out building shaping;
(5) maintenance: the demoulding natural curing after 4 hours of the sample after shaping, its curing time is 12 hours;
(6) dry: adobe maintenance completed is sent in kiln and toasted;
(7) pack: test after kiln discharge and pack.
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|---|---|---|---|
| CN201410607987.3A CN104387096A (en) | 2014-10-31 | 2014-10-31 | Corundum spinel unburned brick for smelting steel ladle and preparation method of corundum spinel unburned brick |
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|---|---|---|---|
| CN201410607987.3A CN104387096A (en) | 2014-10-31 | 2014-10-31 | Corundum spinel unburned brick for smelting steel ladle and preparation method of corundum spinel unburned brick |
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|---|---|
| CN104387096A true CN104387096A (en) | 2015-03-04 |
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495712A (en) * | 2016-10-17 | 2017-03-15 | 安徽马钢耐火材料有限公司 | Unburned ladle brick and preparation method thereof pressed by magnesium gel combined corundum spinelle machine |
| CN109160807A (en) * | 2018-08-20 | 2019-01-08 | 洛阳科创新材料股份有限公司 | A kind of Metal Substrate aluminum-spinel slide plate and preparation method thereof |
| CN115368157A (en) * | 2021-05-21 | 2022-11-22 | 宝山钢铁股份有限公司 | Air brick seat brick and preparation method thereof |
| CN116199517A (en) * | 2023-03-03 | 2023-06-02 | 河南竹林庆州耐火材料有限公司 | A kind of low-carbon corundum spinel impact brick for tundish and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103058677A (en) * | 2012-12-27 | 2013-04-24 | 浙江金磊高温材料股份有限公司 | High-purity Mg-Ca sand and preparation method thereof |
| CN103588492A (en) * | 2013-11-11 | 2014-02-19 | 海城市中兴高档镁质砖有限公司 | High-quality carbon-free aluminum-magnesium spinel brick used for refined steel ladle lining and preparation method thereof |
| CN103992126A (en) * | 2014-05-30 | 2014-08-20 | 浙江自立股份有限公司 | Method for preparing tabular corundum brick for working lining of carbon-free steel ladle |
-
2014
- 2014-10-31 CN CN201410607987.3A patent/CN104387096A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103058677A (en) * | 2012-12-27 | 2013-04-24 | 浙江金磊高温材料股份有限公司 | High-purity Mg-Ca sand and preparation method thereof |
| CN103588492A (en) * | 2013-11-11 | 2014-02-19 | 海城市中兴高档镁质砖有限公司 | High-quality carbon-free aluminum-magnesium spinel brick used for refined steel ladle lining and preparation method thereof |
| CN103992126A (en) * | 2014-05-30 | 2014-08-20 | 浙江自立股份有限公司 | Method for preparing tabular corundum brick for working lining of carbon-free steel ladle |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495712A (en) * | 2016-10-17 | 2017-03-15 | 安徽马钢耐火材料有限公司 | Unburned ladle brick and preparation method thereof pressed by magnesium gel combined corundum spinelle machine |
| CN109160807A (en) * | 2018-08-20 | 2019-01-08 | 洛阳科创新材料股份有限公司 | A kind of Metal Substrate aluminum-spinel slide plate and preparation method thereof |
| CN115368157A (en) * | 2021-05-21 | 2022-11-22 | 宝山钢铁股份有限公司 | Air brick seat brick and preparation method thereof |
| CN116199517A (en) * | 2023-03-03 | 2023-06-02 | 河南竹林庆州耐火材料有限公司 | A kind of low-carbon corundum spinel impact brick for tundish and preparation method thereof |
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Application publication date: 20150304 |
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