CN102400000A - Method for preparing aluminium-silicon alloy and aluminium fluoride through reducing silicon tetrafluoride by utilizing aluminium - Google Patents
Method for preparing aluminium-silicon alloy and aluminium fluoride through reducing silicon tetrafluoride by utilizing aluminium Download PDFInfo
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- CN102400000A CN102400000A CN2011103900997A CN201110390099A CN102400000A CN 102400000 A CN102400000 A CN 102400000A CN 2011103900997 A CN2011103900997 A CN 2011103900997A CN 201110390099 A CN201110390099 A CN 201110390099A CN 102400000 A CN102400000 A CN 102400000A
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- silicon tetrafluoride
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Abstract
The invention provides a method for preparing aluminium-silicon alloy and aluminium fluoride through reducing silicon tetrafluoride by utilizing aluminium, relates to the technical field of materials, in particular to a method for preparing aluminium-silicon alloy and aluminium fluoride through reacting silicon tetrafluoride with aluminium. The method comprises the following steps: a, melting 100-110kg of industrial aluminium powder in a graphite crucible and maintaining the temperature at 800-900 DEG C; b, introducing 20-100kg of industrial silicon tetrafluoride gas into the graphite crucible at a speed of 3-5kg/min so as to react with molten aluminium, thus obtaining soild aluminium fluoride and molten aluminium-silicon alloy; and c, separating the obtained solid aluminium fluoride from the molten aluminium-silicon alloy. By utilizing the method provided by the invention, the problems such as the three wastes, high energy consumption and the like existing in a traditional process route can be solved, the environment load is smaller, and the environmental benefits are higher.
Description
Technical field
The present invention relates to the material technology field, particularly a kind of method for preparing aluminum-silicon alloy and ALUMNIUM FLUORIDE by silicon tetrafluoride and reactive aluminum.
Background technology
Aluminum-silicon alloy is a kind of strong composite deoxidant, in steelmaking process, replaces fine aluminium can improve the reductor utilization ratio, but and cleaning molten steel, improve steel product quality.Aluminium-deoxidized steel ingot is commonly referred to as calm steel, owing to can be oxidized to aluminum oxide behind the aluminium deoxidation, aluminum oxide can refine austenite crystal grain, so the steel of aluminium deoxidation has better comprehensive mechanical property.Aluminum-silicon alloy density is little, and thermal expansivity is low, and castability and abrasion resistance are good, has very high resistance impact capacity and good high pressure compactness with its alloy-steel casting of casting, can improve work-ing life greatly.Aluminum-silicon alloy produces E material, space material as a kind of new E car material, senior skill electronics; Produce on the aviation E spare under E and the hot environment and have broad application prospects at E car wheel box, motor body, E valve, direction E, piston, wheel hub, senior skill electronics, commonly used its produced aerospacecraft and automobile component.
ALUMNIUM FLUORIDE in aluminium electrolytic industry in order to reduce electrolytical temperature of fusion and to improve electric conductivity, as the flux of non-ferrous metal, the fusing assistant of ceramic glaze and vitreous enamel and the component of glaze, and the inhibitor of side fermentation in the essential oil production.Be used as the suppressor factor of side fermentation in the ethanol produce.In new energy materials industry, in the process of preparation anode material of lithium battery-lithium manganate, add 1% ALUMNIUM FLUORIDE, can improve the high temperature cyclic performance of lithium manganate battery.Aluminum-silicon alloy is to use the widest y alloy y, and the used aluminum-silicon alloy in countries in the world all is that fine aluminium and pure silicon consolute are mixed production at present.Producing fine aluminium needs high-grade bauxite, and the static state of China's bauxite ensures that the time limit has only more than ten years, and this method production aluminum-silicon alloy technical process is long and complicated, and energy consumption is high.
Summary of the invention
The objective of the invention is to overcome the defective of prior art; A kind of aluminum-silicon alloy that utilizes phosphatic fertilizer company by-product silicon tetrafluoride to prepare high added value is provided; And can not produce reluctant waste in the process; Utilize the silicon tetrafluoride of by-product in the phosphatic fertilizer company efficiently, adopt the method for molten state aluminium and silicon tetrafluoride prepared in reaction aluminum-silicon alloy and ALUMNIUM FLUORIDE.
Aluminium reducing silicon tetrafluoride of the present invention prepares the method for aluminum-silicon alloy and ALUMNIUM FLUORIDE, may further comprise the steps:
A. with industrial aluminium powder fusion in plumbago crucible of 100-110kg, and maintain the temperature at 800 ℃-900 ℃;
B. react with molten aluminum in the speed feeding plumbago crucible of industrial silicon tetrafluoride gas with 20-100kg, obtain the aluminum-silicon alloy of ALUMNIUM FLUORIDE solid and molten state with 3-5kg/min;
C. the ALUMNIUM FLUORIDE solid that obtains is separated with the molten state aluminum-silicon alloy.
Plumbago crucible is positioned in the closed reactor of band heating among the step a.
The necessary excessive 2.3-10.3 of industrial aluminium powder doubly among the step a.
Among the step b purity of the dry in advance and silicon tetrafluoride of industrial silicon tetrafluoride gas must be more than 98%wt., O
2Content is no more than 10mg/kg.
The step b reaction times, temperature of reaction was between 660 ℃-1100 ℃ between 15min-60min.
Slow feeding among the step b, its speed is controlled through reducing valve and under meter.
The described isolating mode of overflow that is separated into of step c.Mode through overflow is separated the aluminum-silicon alloy of ALUMNIUM FLUORIDE solid and molten state at last.
Aluminium reducing silicon tetrafluoride of the present invention prepares the method for aluminum-silicon alloy and ALUMNIUM FLUORIDE, is to utilize silicon tetrafluoride and reactive aluminum, under the excessive situation of aluminium, controls different mol ratio, reaction times and temperature of reaction, obtains the different aluminum-silicon alloy of silicone content.
Principle of the present invention can be described and explains according to following reaction equation:
3SiF
4?+?4Al?→?4AlF
3?+?3Si
When Al is excessive, form the Al-Si alloy.
Outstanding advantage of the present invention is its economy and environmental value.Economic worth has been to extend the industrial chain of phosphatic fertilizer company by-product silicon tetrafluoride, and silicon tetrafluoride and reactive aluminum are obtained high value added product aluminum-silicon alloy and ALUMNIUM FLUORIDE, makes the distinctive fluorine of phosphatic fertilizer company, silicon resource obtain fully, utilize efficiently.
Environmental value of the present invention is for phosphatic fertilizer company a kind of environmentally friendly innovative technology method that is different from traditional fluorine, silicon resource utilization to be provided; Silicon tetrafluoride and reactive aluminum, the different mol ratio of control; Different aluminum-silicon alloy and the aluminium fluoride products of preparation silicone content; Avoided problems such as " three wastes " that the traditional technology route produces and high energy consumption, carrying capacity of environment is less, and environmental benefit is higher.
The unit equipment that innovative technology method of the present invention can adopt existing technology and process large-scale commercial prodn to verify is implemented and is realized.
Embodiment
The method that silicon tetrafluoride of the present invention prepares aluminum-silicon alloy and ALUMNIUM FLUORIDE will specify in following embodiment, but be not limited to embodiment.
Embodiment 1
Earlier 102kg industry aluminium powder is placed plumbago crucible, again plumbago crucible is put into the closed reactor heating and make industrial aluminium powder fusion, and maintain the temperature between 800 ℃-900 ℃.Then 26kg exsiccant industry silicon tetrafluoride gas is slowly fed in the plumbago crucible and react with molten aluminum, temperature keeps 700 ℃, reaction 30min, obtains the aluminum-silicon alloy of 28kg ALUMNIUM FLUORIDE solid and 100kg molten state, and wherein silicone content is 7%.Mode through overflow is separated the aluminum-silicon alloy of ALUMNIUM FLUORIDE solid and molten state at last.
Embodiment 2
Earlier 103.6kg industry aluminium powder is placed plumbago crucible, again plumbago crucible is put into the closed reactor heating and make industrial aluminium powder fusion, and maintain the temperature between 800 ℃-900 ℃.Then 46.4kg exsiccant industry silicon tetrafluoride gas is slowly fed in the plumbago crucible and react with molten aluminum, temperature keeps 800 ℃, reaction 20min, obtains the aluminum-silicon alloy of 50kg ALUMNIUM FLUORIDE solid and 100kg molten state, and wherein silicone content is 12.5%.Mode through overflow is separated the aluminum-silicon alloy of ALUMNIUM FLUORIDE solid and molten state at last.
Embodiment 3
Earlier 104.3kg industry aluminium powder is placed plumbago crucible, again plumbago crucible is put into the closed reactor heating and make industrial aluminium powder fusion, and maintain the temperature between 800 ℃-900 ℃.Then 55.7kg exsiccant industry silicon tetrafluoride gas is slowly fed in the plumbago crucible and react with molten aluminum, temperature keeps 900 ℃, reaction 15min, obtains the aluminum-silicon alloy of 60kg ALUMNIUM FLUORIDE solid and 100kg molten state, and wherein silicone content is 15%.Mode through overflow is separated the aluminum-silicon alloy of ALUMNIUM FLUORIDE solid and molten state at last.
Embodiment 4
Earlier 105.7kg industry aluminium powder is placed plumbago crucible, again plumbago crucible is put into the closed reactor heating and make industrial aluminium powder fusion, and maintain the temperature between 800 ℃-900 ℃.Then 74.3kg exsiccant industry silicon tetrafluoride gas is slowly fed in the plumbago crucible and react with molten aluminum, temperature keeps 750 ℃, reaction 40min, obtains the aluminum-silicon alloy of 80kg ALUMNIUM FLUORIDE solid and 100kg molten state, and wherein silicone content is 20%.Mode through overflow is separated the aluminum-silicon alloy of ALUMNIUM FLUORIDE solid and molten state at last.
Embodiment 5
Earlier 107.1kg industry aluminium powder is placed plumbago crucible, again plumbago crucible is put into the closed reactor heating and make industrial aluminium powder fusion, and maintain the temperature between 800 ℃-900 ℃.Then 92.9kg exsiccant industry silicon tetrafluoride gas is slowly fed in the plumbago crucible and react with molten aluminum, temperature keeps 850 ℃, reaction 25min, obtains the aluminum-silicon alloy of 100kg ALUMNIUM FLUORIDE solid and 100kg molten state, and wherein silicone content is 25%.Mode through overflow is separated the aluminum-silicon alloy of ALUMNIUM FLUORIDE solid and molten state at last.
Claims (7)
1. the aluminium reducing silicon tetrafluoride prepares the method for aluminum-silicon alloy and ALUMNIUM FLUORIDE, it is characterized in that may further comprise the steps:
A. with industrial aluminium powder fusion in plumbago crucible of 100-110kg, and maintain the temperature at 800 ℃-900 ℃;
B. react with molten aluminum in the speed feeding plumbago crucible of industrial silicon tetrafluoride gas with 20-100kg, obtain the aluminum-silicon alloy of ALUMNIUM FLUORIDE solid and molten state with 3-5kg/min;
C. the ALUMNIUM FLUORIDE solid that obtains is separated with the molten state aluminum-silicon alloy.
2. aluminium reducing silicon tetrafluoride as claimed in claim 1 prepares the method for aluminum-silicon alloy and ALUMNIUM FLUORIDE, it is characterized in that, plumbago crucible is positioned in the closed reactor of band heating among the step a.
3. aluminium reducing silicon tetrafluoride as claimed in claim 1 prepares the method for aluminum-silicon alloy and ALUMNIUM FLUORIDE, it is characterized in that, the necessary excessive 2.3-10.3 of industrial aluminium powder doubly among the step a.
4. aluminium reducing silicon tetrafluoride as claimed in claim 1 prepares the method for aluminum-silicon alloy and ALUMNIUM FLUORIDE, it is characterized in that, among the step b purity of the dry in advance and silicon tetrafluoride of industrial silicon tetrafluoride gas must be more than 98%wt., O
2Content is no more than 10mg/kg.
5. aluminium reducing silicon tetrafluoride as claimed in claim 1 prepares the method for aluminum-silicon alloy and ALUMNIUM FLUORIDE, it is characterized in that, the step b reaction times, temperature of reaction was between 660 ℃-1100 ℃ between 15min-60min.
6. aluminium reducing silicon tetrafluoride as claimed in claim 1 prepares the method for aluminum-silicon alloy and ALUMNIUM FLUORIDE, it is characterized in that, and the slow feeding among the step b, its speed is controlled through reducing valve and under meter.
7. aluminium reducing silicon tetrafluoride as claimed in claim 1 prepares the method for aluminum-silicon alloy and ALUMNIUM FLUORIDE, it is characterized in that the described isolating mode of overflow that is separated into of step c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103900997A CN102400000A (en) | 2011-11-30 | 2011-11-30 | Method for preparing aluminium-silicon alloy and aluminium fluoride through reducing silicon tetrafluoride by utilizing aluminium |
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| CN2011103900997A CN102400000A (en) | 2011-11-30 | 2011-11-30 | Method for preparing aluminium-silicon alloy and aluminium fluoride through reducing silicon tetrafluoride by utilizing aluminium |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103059056A (en) * | 2012-11-01 | 2013-04-24 | 云天化集团有限责任公司 | Method for preparing methyl silicate and magnesium fluoride from silicon tetrafluoride, methanol and magnesium |
| CN103059055A (en) * | 2012-11-01 | 2013-04-24 | 云天化集团有限责任公司 | Method for preparing methyl silicate and aluminum fluoride from silicon tetrafluoride and methanol |
| CN113355651A (en) * | 2021-05-19 | 2021-09-07 | 湖北省黄麦岭磷化工有限责任公司 | Gas phase preparation method of anhydrous aluminum fluoride |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2071986C1 (en) * | 1993-09-20 | 1997-01-20 | Александр Иванович Карелин | Method of silumin preparing |
| EP1857168A2 (en) * | 2006-05-10 | 2007-11-21 | Sincono Ag | Oil-bearing sands and shales, their mixtures as raw materials for fixing or dissociating carbon dioxide and NOx, and for producing cristalline silicium, hydrogen, silicon nitride, silicium carbide and silanes |
| CN102041396A (en) * | 2010-10-28 | 2011-05-04 | 湖南晟通科技集团有限公司 | Preparation method of scouring agent for aluminum and aluminum alloy |
| US20110158896A1 (en) * | 2009-12-30 | 2011-06-30 | Memc Electronic Materials, Inc. | Methods For Producing Aluminum Trifluoride |
-
2011
- 2011-11-30 CN CN2011103900997A patent/CN102400000A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2071986C1 (en) * | 1993-09-20 | 1997-01-20 | Александр Иванович Карелин | Method of silumin preparing |
| EP1857168A2 (en) * | 2006-05-10 | 2007-11-21 | Sincono Ag | Oil-bearing sands and shales, their mixtures as raw materials for fixing or dissociating carbon dioxide and NOx, and for producing cristalline silicium, hydrogen, silicon nitride, silicium carbide and silanes |
| US20110158896A1 (en) * | 2009-12-30 | 2011-06-30 | Memc Electronic Materials, Inc. | Methods For Producing Aluminum Trifluoride |
| CN102041396A (en) * | 2010-10-28 | 2011-05-04 | 湖南晟通科技集团有限公司 | Preparation method of scouring agent for aluminum and aluminum alloy |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103059056A (en) * | 2012-11-01 | 2013-04-24 | 云天化集团有限责任公司 | Method for preparing methyl silicate and magnesium fluoride from silicon tetrafluoride, methanol and magnesium |
| CN103059055A (en) * | 2012-11-01 | 2013-04-24 | 云天化集团有限责任公司 | Method for preparing methyl silicate and aluminum fluoride from silicon tetrafluoride and methanol |
| CN103059056B (en) * | 2012-11-01 | 2016-03-09 | 云天化集团有限责任公司 | A kind of silicon tetrafluoride, methyl alcohol and magnesium prepare the method for methyl silicate and magnesium fluoride |
| CN103059055B (en) * | 2012-11-01 | 2016-03-16 | 云天化集团有限责任公司 | A kind of silicon tetrafluoride, methyl alcohol and aluminum are for the method for methyl silicate and aluminum fluoride |
| CN113355651A (en) * | 2021-05-19 | 2021-09-07 | 湖北省黄麦岭磷化工有限责任公司 | Gas phase preparation method of anhydrous aluminum fluoride |
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Application publication date: 20120404 |