CN105272296A - Method for preparing pouring material for aluminum smelting - Google Patents
Method for preparing pouring material for aluminum smelting Download PDFInfo
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- CN105272296A CN105272296A CN201510692962.2A CN201510692962A CN105272296A CN 105272296 A CN105272296 A CN 105272296A CN 201510692962 A CN201510692962 A CN 201510692962A CN 105272296 A CN105272296 A CN 105272296A
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Abstract
The invention belongs to the field of refractory materials and relates to a method for preparing a pouring material for aluminum smelting. The pouring material comprises components of raw materials in percentage as follows: 69wt% of corundum particles of 0 mm-8 mm, 21wt% of aluminum nitride powder smaller than 0.044 mm, 4wt% of pure calcium aluminate cement smaller than 0.074 mm and 5wt% of silica micropowder with D90 equal to 0.1 mu m; BaSO4, TiB2, SrTiO3 and Na3AlF6 are compounded to be used as a molten aluminium wetting resisting agent, the addition amount of the agent is 1wt%, sodium tripolyphosphate accounting for 0.12% of the total weight of the raw materials and polycarboxylate accounting for 0.03% of the total weight of the raw materials are added to be used as dispersing agents, and aluminum sol is used as a construction liquid. The pouring material prepared with the method has the sufficient strength, the excellent thermal shock resistance, the good volume stability and the good chemical stability, and the key is that the pouring material is resistant to molten aluminium wetting, good in thermal stability and resistant to molten aluminium corrosion, does not affect components of molten aluminium and has the long service life.
Description
Technical field
The invention belongs to fire resisting material field, relate generally to the preparation method of the mould material that a kind of aluminium metallurgy industry uses.
Background technology
Coloured industry production large aluminum alloy plate ingot, and further the product such as deep processing Lv Ban Dai ﹑ aluminium foil requires high to the control accuracy of al alloy component.As the Large size Aluminium smelting furnace inner lining material of aluminium alloy deep processing project key equipment, especially the control of inner lining material to al alloy component that the throat such as Bu ﹑ sidewall and stream aluminium groove adopts Di aluminium mouth valley of entering of aluminium melting furnace plays an important role.Aluminium liquid is not only containing the element such as chemically reactive height Mei ﹑ silicon and zinc, and mobility is fabulous, and 750 DEG C time, its viscosity is only 0.104Pas, close with the viscosity (0.1Pas) of water when 20 DEG C, easily to furnace lining internal penetration.Large size Aluminium smelting furnace enters periodicity that Bu ﹑ sidewall and stream aluminium Pot Lining material Di aluminium mouth valley not only will resist aluminium liquid and washes away the physical damnification that causes and thermal shock is impacted, the more important thing is and want aluminum-liquid wetting resisting, do not react with the alloying constituent in aluminium liquid, and then affect the composition of alloy product.This position current material aluminum-liquid wetting resisting is poor, easily pollutes aluminium liquid composition, causes alloy product off analysis.
Summary of the invention
For solving the problems of the technologies described above, object of the present invention proposes a kind of preparation method of mould material, makes it have aluminum-liquid wetting resisting, does not affect aluminium liquid composition, the feature of long service life.。
Object of the present invention adopts following technical scheme to realize:
A kind of mould material, the raw material composition of described mould material and proportioning are: the fine silica powder 5wt% ~ 6wt% of 8mm-0mm corundum in granules 63wt% ~ 69wt% ﹑ < 0.044mm aluminium nitride fine powder 18wt% ~ 21wt% ﹑ < 0.074mm pure calcium aluminate cement 4wt% ~ 7wt% ﹑ D90=0.1 μm, adopt BaSO
4, TiB
2, SrTiO
3, Na
3alF
6compound is as aluminum-liquid wetting resisting additive, and its add-on is 1wt% ~ 6wt%, and account for raw material gross weight 0.12% tripoly phosphate sodium STPP and 0.03% polycarboxylate as dispersion agent; During preparation, first the aluminum nitride powder raw material of aluminum-liquid wetting resisting agent and granularity < 0.044mm is ground 30mins altogether in vibration mill; Make aluminum-liquid wetting resisting agent and aluminum nitride powder abundant homogenizing in advance, make homogenizing powder, then homogenizing powder is mixed with other component in proportion, the additional Alumina gel accounting for raw material gross weight 4% ~ 8% when construction is stirred, mix evenly; Then for cast-in-site, mould material is prepared.
BaSO in described aluminum-liquid wetting resisting agent
4, TiB
2, SrTiO
3, Na
3alF
6weight ratio be 2:1:1:1.
Alumina content >=95% of described corundum, aluminium nitride content >=98.5wt% in aln raw material.
Described pure calcium aluminate cement granularity < 0.074mm, Al in raw material
2o
3content is greater than 71wt%.
SiO in described fine silica powder raw material
2content be 91wt% ~ 97wt%.
In the present invention: select BaSO
4, TiB
2, SrTiO
3, Na
3alF
6compound aluminum-liquid wetting resisting agent has following characteristics, and (1) aluminium nitride thing material itself is not easily wetted by aluminum, and its wetting angle is 138 °, and therefore by its main component as refractory castable, aluminum-liquid wetting resisting is good.(2) BaSO
4the free SiO of mould material can be caught
2, improve not being wetted by aluminum and aggressiveness of mould material, but when adding separately, effect is bad, by selecting the BaSO of compound
4, TiB
2, SrTiO
3, Na
3alF
6aluminum-liquid wetting resisting agent, significantly improves not the being wetted by aluminum property of mould material, the resistance to fouling of thermostability, mould material.(3) improve the intensity of mould material with Alumina gel and pure calcium aluminate as combined binder; In addition, Alumina gel can be well dispersed in inside mould material, and aluminum-resistant liquid erosion performance is good, is easy to the overall performance improving mould material.
In the present invention: adopt the aluminium nitride fine powder of aluminum-liquid wetting resisting agent and mould material to carry out common mill: aluminum-liquid wetting resisting agent is most important for this kind of mould material, but action of forced stirring and dispersion agent is only adopted to be not enough to aluminum-liquid wetting resisting agent is disperseed in the matrix of mould material effectively equably due to the production method of add-on Shao ﹑ surfactivity also Bu Gao ﹑ tradition mould material; Adopt and aluminum-liquid wetting resisting agent and aluminium nitride fine powder are first carried out common mill, and then mix with other components of mould material, make a small amount of aluminum-liquid wetting resisting agent abundant homogenizing in mould material matrix, reach the object that whole mould material matrix is not wetted by aluminum.Experiment proves, aluminum-liquid wetting resisting agent add-on is less than the object that 1% tentatively can play anti-aluminium liquid wetting, is greater than construction and high-temperature behavior that 6% will have a strong impact on mould material.
Mould material of the present invention is through test, for positions such as Bu ﹑ sidewall Di Large size Aluminium smelting furnace (maximum capacity 100 tons) enterprising aluminium mouth valley and stream aluminium grooves, there is enough Hao ﹑ chemical stabilities of Qiang Du ﹑ thermal shock resistance You Liang ﹑ volume stability good, key is aluminum-liquid wetting resisting, do not affect aluminium liquid composition, long service life.
Embodiment
Embodiment 1: a kind of mould material is by the fine silica powder 5wt% ﹑ compound aluminum-liquid wetting resisting additive 1wt%(BaSO of 8mm-0mm corundum in granules 69wt% ﹑ < 0.044mm aluminium nitride fine powder 21wt% ﹑ < 0.074mm pure calcium aluminate water 4wt% ﹑ D90=0.1 μm
40.4wt%, TiB
20.2wt%, SrTiO
30.2wt%, Na3AlF60.2wt%); And account for raw material gross weight 0.12% tripoly phosphate sodium STPP and 0.03% polycarboxylate as dispersion agent; During preparation, first the aluminium nitride fine powder raw material of aluminum-liquid wetting resisting agent and granularity < 0.044mm is ground 30mins altogether in vibration mill; Make aluminum-liquid wetting resisting agent and aluminium nitride fine powder abundant homogenizing in advance, make homogenizing powder, the ratio accounted for altogether at aluminium nitride refractory castable in aluminum-liquid wetting resisting agent and aluminium nitride fine powder by homogenizing powder again and 22wt% and other component mix, additional about 5wt% Alumina gel when construction is stirred, mix evenly, at the on-the-spot vibrating casting of block stove, use after conventional maintenance baking.
Embodiment 2: a kind of mould material is by the fine silica powder 6wt% ﹑ compound aluminum-liquid wetting resisting additive 4wt%(BaSO of 8mm-0mm corundum in granules 66wt% ﹑ < 0.044mm aluminium nitride fine powder 18wt% ﹑ < 0.074mm pure calcium aluminate cement 6wt% ﹑ D90=0.1 μm
41.6wt%, TiB
20.8wt%, SrTiO
30.8wt%, Na3AlF60.8wt%); And account for raw material gross weight 0.12% tripoly phosphate sodium STPP and 0.03% polycarboxylate as dispersion agent; Preparation process is with embodiment 1, and additional about 6wt% Alumina gel when construction is stirred, mixes evenly, at the on-the-spot vibrating casting of block stove, uses after conventional maintenance baking.
Embodiment 3: a kind of mould material is by the fine silica powder 6wt% ﹑ compound aluminum-liquid wetting resisting additive 4wt%(BaSO of 8mm-0mm corundum in granules 65wt% ﹑ < 0.044mm aluminium nitride fine powder 18wt% ﹑ < 0.074mm pure calcium aluminate cement 7wt% ﹑ D90=0.1 μm
41.6wt%, TiB
20.8wt%, SrTiO
30.8wt%, Na
3alF
60.8wt%); And account for raw material gross weight 0.12% tripoly phosphate sodium STPP and 0.03% polycarboxylate as dispersion agent; Preparation process is with embodiment 1, and additional about 8wt% Alumina gel when construction is stirred, mixes evenly, at the on-the-spot vibrating casting of block stove, uses after conventional maintenance baking.
Claims (1)
1. the preparation method of an aluminium metallurgy mould material, it is characterized in that: the raw material composition of described mould material and proportioning are: the fine silica powder 5wt% of 8mm-0mm corundum in granules 69wt% ﹑ < 0.044mm aluminum nitride powder 21wt% ﹑ < 0.074mm pure calcium aluminate cement 4wt% ﹑ D90=0.1 μm, adopt BaSO
4, TiB
2, SrTiO
3, Na
3alF
6compound is as aluminum-liquid wetting resisting agent, and its add-on is 1wt%, and account for raw material gross weight 0.12% tripoly phosphate sodium STPP and 0.03% polycarboxylate as dispersion agent; During preparation, first the aluminum nitride powder raw material of aluminum-liquid wetting resisting agent and granularity < 0.044mm is ground 30min altogether in vibration mill; Make aluminum-liquid wetting resisting agent and aluminum nitride powder abundant homogenizing in advance, make homogenizing powder, then homogenizing powder is mixed with other component in proportion, the additional Alumina gel accounting for raw material gross weight 5% when construction is stirred, mix evenly; Then for cast-in-site, the aluminium nitride mould material of aluminum-liquid wetting resisting is prepared; BaSO in described aluminum-liquid wetting resisting agent
4and TiB
2and SrTiO
3and Na
3alF
6weight ratio 2:1:1:1; Alumina content>=95% of described corundum, aluminium nitride content>=98.5wt% in aluminum nitride powder; Described pure calcium aluminate cement granularity < 0.074mm, Al in raw material
2o
3content is greater than 71wt%; SiO in described fine silica powder raw material
2content be 91wt% ~ 97wt%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410323740.9A CN104030713B (en) | 2014-07-09 | 2014-07-09 | A kind of preparation method of mould material |
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|---|---|---|---|
| CN201410323740.9A Division CN104030713B (en) | 2014-07-09 | 2014-07-09 | A kind of preparation method of mould material |
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| CN105272296A true CN105272296A (en) | 2016-01-27 |
Family
ID=51461743
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510676309.7A Pending CN105272294A (en) | 2014-07-09 | 2014-07-09 | Pouring material for aluminum smelting |
| CN201510692767.XA Pending CN105272295A (en) | 2014-07-09 | 2014-07-09 | Method for preparing pouring material for aluminum smelting |
| CN201510692962.2A Pending CN105272296A (en) | 2014-07-09 | 2014-07-09 | Method for preparing pouring material for aluminum smelting |
| CN201410323740.9A Active CN104030713B (en) | 2014-07-09 | 2014-07-09 | A kind of preparation method of mould material |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510676309.7A Pending CN105272294A (en) | 2014-07-09 | 2014-07-09 | Pouring material for aluminum smelting |
| CN201510692767.XA Pending CN105272295A (en) | 2014-07-09 | 2014-07-09 | Method for preparing pouring material for aluminum smelting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108558377B (en) * | 2018-06-25 | 2020-12-18 | 武汉科技大学 | Steel ladle castable for high-nitrogen steel smelting and preparation method thereof |
| CN109020517A (en) * | 2018-08-23 | 2018-12-18 | 安徽瑞泰新材料科技有限公司 | A kind of preparation method of castable refractory |
| CN109020578A (en) * | 2018-09-11 | 2018-12-18 | 郑州荣盛窑炉耐火材料有限公司 | A kind of aluminum-resistant liquid is stained with knot and the energy-saving castable of infiltration and preparation method thereof |
| CN111620675A (en) * | 2019-11-15 | 2020-09-04 | 东台市悦兴耐火材料有限公司 | High-strength aluminum-permeation-resistant castable and preparation method thereof |
| CN112094126B (en) * | 2020-09-23 | 2021-05-07 | 新疆立恩高温新材料有限公司 | Non-wetting hard aluminum alloy castable and preparation process thereof |
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| CN101747053B (en) * | 2009-12-24 | 2012-08-08 | 中钢集团洛阳耐火材料研究院有限公司 | Method for preparing aluminum-liquid wetting resisting silicon carbide castable |
| CN101734935B (en) * | 2009-12-24 | 2012-07-11 | 中钢集团洛阳耐火材料研究院有限公司 | Aluminium liquid infiltration-resistant high-aluminum plastic material and preparation method |
| CN101717246B (en) * | 2009-12-24 | 2012-03-28 | 中钢集团洛阳耐火材料研究院有限公司 | Method for preparing high alumina castable without being moistened by aluminum liquid |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105272294A (en) | 2016-01-27 |
| CN104030713B (en) | 2016-01-20 |
| CN104030713A (en) | 2014-09-10 |
| CN105272295A (en) | 2016-01-27 |
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Application publication date: 20160127 |