CN105130473A - Permanent layer casting material containing synthetic forsterite - Google Patents
Permanent layer casting material containing synthetic forsterite Download PDFInfo
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- CN105130473A CN105130473A CN201510582284.4A CN201510582284A CN105130473A CN 105130473 A CN105130473 A CN 105130473A CN 201510582284 A CN201510582284 A CN 201510582284A CN 105130473 A CN105130473 A CN 105130473A
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Abstract
The invention belongs to the technical field of refractory materials, and particularly relates to a permanent layer casting material containing synthetic forsterite. The casting material is prepared from the following raw materials in parts by weight: 0 to 25 percent of 8 to 15 mm of synthetic forsterite particles; 25 to 75 percent of 0.1 to 8 mm of synthetic forsterite particles; 5 to 22 percent of synthetic forsterite fine powder; 2 to 10 percent of 0.5 to 1 mm of quartz particles; 0 to 7 percent of quartz fine powder; 10 to 16 percent of magnesite fine powder; 0.5 to 7.5 percent of silicon dioxide micro powder; 0.1 to 0.5 percent of water reducer. According to the permanent layer casting material containing the synthetic forsterite, provided by the invention, in the formula of the casting material, the synthetic forsterite with high purity, good fire resistance, shrink resistance and low heat conductivity coefficient is added to replace the conventional raw materials such as dense high-alumina bauxite and mullite which are commonly used in permanent layers of a hot-metal bottle, a steel ladle and a tundish, and the permanent layer casting material has the advantage of relatively low production cost and has the meaning of saving resources of good quality and protecting eco-environment.
Description
Technical field
The invention belongs to technical field of refractory materials, be specifically related to a kind of permanent layer mould material containing synthetic forsterite.
Background technology
Iron ladle, ladle, tundish are transports, smelt or the container of pouring molten iron/molten steel, and the temperature of molten iron/molten steel is generally at 1400 ~ 1600 DEG C, even higher.These high temperature liquid iron/molten steel have very high danger, once reveal, and gently then burning apparatus, heavy then great personnel safety accident occurs, cause heavy losses.The inner lining refractory allocation plan of these smelting iron and steel containers is generally: the good refractory materials of working lining use properties of innermost layer contact molten steel; Outer one deck permanent layer again; Outermost near one deck fiberboard of box hat or heat-insulating shield, to reduce box hat temperature.The vital role of permanent layer is, when working lining once lose efficacy, when causing molten steel to arrive permanent layer, permanent layer can withstand high-temperature molten steel within for some time, prevents high-temperature molten steel from burning box hat and causes molten steel to reveal.This just requires that permanent layer must be high temperature resistant, and the volume stability under high temperature will be got well.Another effect of permanent layer is heat insulating function, reduces molten steel temperature drop, reduces box hat temperature, reduces box hat distortion and heat dissipation capacity, plays an important role, therefore wish that the thermal conductivity of permanent layer is more low better to reduction steel-making energy consumption.
At present, permanent layer is generally mould material or the refractory brick of alumina-silica, and main raw material uses premium high-alumina alumina or mullite, for improving SNR also will add corundum and alumina powder etc. sometimes, mould material with high-alumina cement or pure calcium aluminate cement for bonding agent.In recent years, along with the fast development of aluminum i ndustry, the alumine resource of high-quality is taken in a large number by aluminum i ndustry, and resource is fewer and feweri, and price is more and more higher, causes the cost of permanent layer more and more higher.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of permanent layer mould material containing synthetic forsterite, there is raw materials cost low, save high-quality resource, the feature of preserving the ecological environment.
Permanent layer mould material containing synthetic forsterite of the present invention, be made up of the raw material of following weight percentage:
Wherein, the described preferred composition of raw materials of permanent layer mould material is as follows:
Described synthetic forsterite is made up of the raw material of following weight percentage:
Magnesite 60 ~ 90%;
Quartz 10 ~ 40%.
Described synthetic forsterite preparation method is as follows:
Magnesite, quartz are ground to 150 ~ 800 orders, mix, after adding bonding agent and water, again mix; Machine is pressed into after base or crowded mud become base and carries out drying, calcining, the synthetic forsterite cooling described.
Bonding agent is lignosulfite, and add-on is 0.5 ~ 3% of magnesite and quartzy total mass, and optimal addn is 2%.
Described drying is less than 3% for being dried to moisture.
Described calcining temperature is 1500 DEG C ~ 1650 DEG C, and calcination time is 1 ~ 10 hour.
The raw material of described synthetic forsterite and preparation method, preferred technical scheme is as follows:
Magnesite 75%;
Quartz 25%.
Magnesite, quartz are ground to 500 orders, tail over and be less than 5%, mix, after adding lignosulfite and water, again mix; Be pressed into adobe with pressing machine with the pressure of 100MPa, be dried to moisture and be less than 1%.Calcine 3 hours at 1600 DEG C, after cooling, obtain described synthetic forsterite.The add-on of lignosulfite is 2% of magnesite and quartzy total mass, and the add-on of water is 6% of magnesite and quartzy total mass.
Forsterite belongs to silicate minerals, and chemical formula is 2MgOSiO
2, fusing point is 1890 DEG C, without crystal conversion between normal temperature to fusing point, is MgO-SiO
2fire-resistant phase stable in system, high-temperature behavior is excellent, stable chemical performance, not easily aquation, and high-temperature shrinkage is little.Meanwhile, the thermal conductivity of forsterite is lower, only has 1/3 ~ 1/4 of magnesia.Therefore the permanent layer of Thermal Equipment particularly iron ladle, ladle, tundish is suitable for.Forsterite have natural and synthetic point.China rarely in the world severally has one of country of olive stone ore, and China's natural boltonite ore deposit is distributed in the ground such as Hubei, Henan, Shaanxi, the Inner Mongol, Xinjiang, Sichuan, Hebei.But natural boltonite iron oxide content is high, the particularly forsterite of China, iron oxide content is about 7 ~ 10%, and some iron exist with the ferric oxide of free state, seriously can reduce the fire performance of mould material, produce contraction under high temperature, occur crackle etc., bring very big hidden danger can to the safe operation of iron ladle, ladle, tundish etc.Meanwhile, the thermal conductivity of ferric oxide is higher, is unfavorable for the heat-insulation and heat-preservation of mould material, and energy consumption raises, and clad temperature also can be made to raise, easily produce distortion.
The present invention adopts synthetic forsterite as the raw material of mould material, and without natural boltonite, has the advantages such as impurity is few, high-temperature behavior is good, thermal conductivity is low.In order to reduce the cost of synthetic forsterite, and the precious resources that Appropriate application is limited, the raw material of synthetic forsterite can select the lower particularly SiO of grade
2the magnesite that content is higher, also can select the mine tailing after selected magnesite, wide material sources and price is all lower, also solves the stacking environmental pollution problem of magnesite tailings simultaneously.Synthetic forsterite SiO
2bringing into of composition, except magnesite is brought into, remainder adds with the form of quartz.China's quartz mine rich reserves, distribution is wide, price is low, and the forsterite cost therefore synthesized is lower.
The particle diameter of described synthetic forsterite fine powder is 150 ~ 500 orders.
Described water reducer is tripoly phosphate sodium STPP.
Permanent layer mould material containing synthetic forsterite of the present invention adopts following technical process to be prepared:
The broken pulverizing of raw material, screening, fine grinding → batching → stirring → discharging packaging → permanent layer mould material.
In sum, beneficial effect of the present invention is as follows:
(1) synthetic forsterite that the present invention adds in casting material formula that purity is high, fire performance good, do not shrink, thermal conductivity is low; replace the raw material such as compact high-alumina alumina, mullite that conventional iron ladle, ladle, tundish permanent layer are conventional; there is the advantage that production cost is lower, there is the meaning of saving high-quality resource, preserving the ecological environment.
(2) permanent layer mould material of the present invention is applicable to iron ladle, ladle and tundish, and cost is low, fire performance good.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
The all raw materials used in embodiment, except specified otherwise, are commercial.
The synthetic forsterite that embodiment 1-3 adopts, raw material used is:
Magnesite 75%;
Quartz 25%.
Preparation method is: magnesite, quartz are ground to 500 orders, tail over and be less than 5%, mix, after adding lignosulfite and water, again mix; Be pressed into adobe with pressing machine with the pressure of 100MPa, be dried to moisture and be less than 1%.Calcine 3 hours at 1600 DEG C, after cooling, obtain described synthetic forsterite.The add-on of lignosulfite is 2% of magnesite and quartzy total mass, and the add-on of water is 6% of magnesite and quartzy total mass.
The composition of raw materials of the permanent layer mould material containing synthetic forsterite described in embodiment 1-3 is in table 1.
The composition of raw materials of the permanent layer mould material containing synthetic forsterite described in table 1 embodiment 1-3
Preparation process:
In stirrer, first all particulate materials are stirred 2 minutes, then add all fine powder materials, then stir discharging after 8 minutes, this refractory materials is packed, becomes iron ladle, ladle, tundish permanent layer mould material.
Carry out performance test respectively to the mould material adopting embodiment 1-3 formula material to prepare, test result is in table 2.The GB that test described in form all adopts refractories industry general or smelting mark.
The performance test results of the mould material that table 2 adopts embodiment 1-3 formula material to prepare
Claims (9)
1., containing a permanent layer mould material for synthetic forsterite, it is characterized in that: be made up of the raw material of following weight percentage:
2. the permanent layer mould material containing synthetic forsterite according to claim 1, is characterized in that: be made up of the raw material of following weight percentage:
3. the permanent layer mould material containing synthetic forsterite according to claim 1, is characterized in that: the particle diameter of described synthetic forsterite fine powder is 150 ~ 500 orders.
4. the permanent layer mould material containing synthetic forsterite according to claim 1, is characterized in that: described synthetic forsterite is made up of the raw material of following weight percentage:
Magnesite 60 ~ 90%;
Quartz 10 ~ 40%.
5. the permanent layer mould material containing synthetic forsterite according to claim 4, is characterized in that: described synthetic forsterite is made up of the raw material of following weight percentage:
Magnesite 75%;
Quartz 25%.
6. the permanent layer mould material containing synthetic forsterite according to claim 4 or 5, is characterized in that: described synthetic forsterite preparation method is as follows:
Magnesite, quartz are ground to 150 ~ 800 orders, mix, after adding bonding agent and water, again mix; Machine is pressed into after base or crowded mud become base and carries out drying, calcining, the synthetic forsterite cooling described.
7. the permanent layer mould material containing synthetic forsterite according to claim 6, it is characterized in that: described bonding agent is lignosulfite, add-on is 0.5 ~ 3% of magnesite and quartzy total mass.
8. the permanent layer mould material containing synthetic forsterite according to claim 6, is characterized in that: described calcining temperature is 1500 DEG C ~ 1650 DEG C, and calcination time is 1 ~ 10 hour.
9. the permanent layer mould material containing synthetic forsterite according to claim 1, is characterized in that: described water reducer is tripoly phosphate sodium STPP.
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| CN201510582284.4A CN105130473B (en) | 2015-09-14 | 2015-09-14 | Permanent layer castable containing synthetic forsterite |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107117978A (en) * | 2017-06-30 | 2017-09-01 | 张静芬 | A kind of high-temperature pipe energy-conservation castable |
| CN107226704A (en) * | 2017-06-30 | 2017-10-03 | 张静芬 | A kind of kiln saves castable with fire resisting |
| CN107266090A (en) * | 2017-06-30 | 2017-10-20 | 张静芬 | A kind of low heat conduction fire resisting energy-conservation castable and preparation method thereof |
| CN108395262A (en) * | 2018-04-16 | 2018-08-14 | 河南工业大学 | A kind of olivine combination magnesium aluminate spinel hollow ball castable and preparation method |
| CN109336626A (en) * | 2018-11-22 | 2019-02-15 | 武汉科技大学 | Using forsterite as castable of primary raw material and preparation method thereof |
| CN112456992A (en) * | 2021-02-03 | 2021-03-09 | 北京利尔高温材料股份有限公司 | Pouring material for tundish working lining and preparation method thereof |
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| CN103787681A (en) * | 2014-02-14 | 2014-05-14 | 唐山市国亮特殊耐火材料有限公司 | Tundish diffuse type air brick and preparation method thereof |
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2015
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103787681A (en) * | 2014-02-14 | 2014-05-14 | 唐山市国亮特殊耐火材料有限公司 | Tundish diffuse type air brick and preparation method thereof |
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| 多志军等: "粒度对原位合成镁橄榄石性能的影响", 《耐火材料》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107117978A (en) * | 2017-06-30 | 2017-09-01 | 张静芬 | A kind of high-temperature pipe energy-conservation castable |
| CN107226704A (en) * | 2017-06-30 | 2017-10-03 | 张静芬 | A kind of kiln saves castable with fire resisting |
| CN107266090A (en) * | 2017-06-30 | 2017-10-20 | 张静芬 | A kind of low heat conduction fire resisting energy-conservation castable and preparation method thereof |
| CN108395262A (en) * | 2018-04-16 | 2018-08-14 | 河南工业大学 | A kind of olivine combination magnesium aluminate spinel hollow ball castable and preparation method |
| CN109336626A (en) * | 2018-11-22 | 2019-02-15 | 武汉科技大学 | Using forsterite as castable of primary raw material and preparation method thereof |
| CN109336626B (en) * | 2018-11-22 | 2021-02-02 | 武汉科技大学 | Magnesium castable with forsterite as main raw material and preparation method thereof |
| CN112456992A (en) * | 2021-02-03 | 2021-03-09 | 北京利尔高温材料股份有限公司 | Pouring material for tundish working lining and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN105130473B (en) | 2017-07-07 |
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