CN102732753A - Production method for high content aluminum-base interalloy - Google Patents
Production method for high content aluminum-base interalloy Download PDFInfo
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Abstract
The present invention discloses a production method for a high content aluminum-base interalloy. The method is characterized in that: concentration of an alloy element requiring separation and concentration in the low content aluminum alloy is more than or equal to 0.5 wt%, and the density of the alloy element is greater than the density of aluminum; the low content aluminum alloy requiring separation and concentration is completely melted and subjected to thermal insulation, wherein the melting temperature is 30-100 DEG C higher than the liquidus of the aluminum alloy under the concentration, and the thermal insulation time is 10-30 minutes; after the melting and thermal insulation time is achieved, standing separation is performed, wherein the melt temperature is decreased to the temperature (the standing temperature) which is 20-120 DEG C higher than the solidus of the low content aluminum alloy, and the standing time is 1.0-3.0 hours; and after the standing time is achieved, the high content aluminum-base interalloy melt casting and the high purity aluminum metal melt casting are performed. The method of the present invention has advantages of short process, energy consumption reducing, resource waste reducing, environmental pollution reducing, cost reducing, high product quality, and the like, wherein the cost of the method of the present invention can be reduced by more than 15% compared with the traditional mixing method.
Description
Technical field
The present invention relates to the aluminium base master alloy production technique of a kind of high-content, promptly through separation concentrates and purifies to the low levels aluminum base alloy, the low levels aluminum base alloy that can obtain aluminium base master alloy of high-content and raffinal metal simultaneously separates the technology that concentrates with purification.
Background technology
In national standard " aluminium intermediate alloy " (issuing) and U.S. ASTM standard system (grey handbook: " the international trade mark of aluminium intermediate alloy and chemical ingredients "); The aluminium base master alloy that is used for the alloying constituent adjustment requires the alloy active constituent content higher, and for example aluminium titanium master alloy requirement titanium content is minimum is 2.5-3.5wt%; It is 2.7-3.3wt% that aluminium zirconium hardener requires zirconium content minimum.
The method of producing aluminium base master alloy at present mainly is that method, hot reducing method and electrolytic process are mixed in molten pairing.The molten pairing method of mixing is about to pure aluminum metal and prepares aluminium base master alloy method with adding after metal melts according to a certain percentage; It is traditional method; Technical maturity, but there is following shortcoming in it: (1), need the refuse pure aluminum metal and add corresponding alloying element, and in to fusion aurification process; The secondary scaling loss that produces aluminium and mix gold conjugate composition metal causes the wasting of resources, secondary pollution and secondhand energy consumption; (2), mix join the method alloying process can be different because of the fusing point of aluminium and alloying element, the different solubility of alloying element in aluminium is easy to form the segregation of composition, causes the product composition lack of homogeneity; (3), some is volatile, being prone to scaling loss, to mix the casting yield of gold conjugate element low; (4), whole process flow is complicated, production cost is high; (5), molten joining in the process, cause the increase of other impurity element easily.
Hot reducing method can be produced the higher aluminium base master alloy of content, but because high temperature oxidation is easy to generate oxide inclusion, causes aluminium base master alloy quality lower.
It is advanced process method that electrolytic process is produced aluminium base master alloy; But owing to receive condition restriction such as electrolysis process condition, aluminium base master alloy concentration; Effectively the content of alloying constituent is on the low side; General content is 0.5%-2.0%, can not satisfy the Composition Control requirement of master alloy, is difficult to directly be used to produce the aluminium base master alloy that complies with the national standard requirements.
Publication number is that the Chinese patent document of CN101514418A discloses a kind of aluminum titanium alloy and preparation method thereof; It adopts main raw material is that 99.97% to 99.99% primary aluminum liquid and titanium content are 99.8% to 99.9% Titanium Sponge 40-60 mesh for aluminium content; Fusion process uses refining agent, molten aluminium to use insulating covering agent, and impurity element can't satisfy the HB5371-1987 standard-required in the rafifinal titanium master alloy Chemical Composition of final production; The aluminium titanium master alloy that in the high purity aluminum alloy actual production, uses this method to produce, high purity aluminum alloy Chemical Composition and design requirements deviation are bigger, and impurity content and Ti constituent content can't meet design requirement.Utilize the aluminium titanium master alloy of the working method production of having announced to have bigger composition segregation, shortcomings such as micro impurity element content height are used in high purity aluminum alloy is produced, and batching can not reach design requirements, cause the whole stove of duraluminum to be scrapped.
In sum, the existing aluminium base master alloy working method of high-content energy consumption high, pollute big, consumed resource is big, complex process, cost are high, quality product does not reach request for utilization.
Summary of the invention
The object of the present invention is to provide a kind of passing through to separate concentrated and purification, thereby produce the technology of the aluminium base master alloy of high-content the low levels aluminum base alloy; When producing the aluminium base master alloy of high alloy component content, obtain the metallic aluminium of higher degree, thereby improve the aluminium base master alloy working method of a kind of high-content of aluminium and alloy product added value.
The present invention is implemented by following technical scheme:
The working method of the aluminium base master alloy of a kind of high-content is characterized in that:
(1) need in the low levels duraluminum to separate spissated alloy element concentration >=0.5wt%, this alloying element density is greater than the density of aluminium;
(2) will wait to separate spissated low levels duraluminum all fusing and insulation, temperature of fusion is under this concentration the above 30-100 of aluminum alloy melt phase line ℃, and soaking time is 10-30min;
(3) after the melting and heat preservation time reaches, carry out standing separation, dwell temperature is for to be reduced to above 20-120 ℃ of this low levels duraluminum solidus curve with melt temperature, time of repose 1.0-3.0h;
(4) after time of repose reaches, carry out the casting of aluminium base master alloy melt of high-content and raffinal metal melt.
Above-mentioned method, wherein, the partition ratio of this alloying element in aluminium is greater than 1.
Above-mentioned method, wherein, after standing separation, with lower leaf on the aluminium alloy melt in the molten bath, wherein lower floor is the aluminium base master alloy melt of spissated high-content, the upper strata is the raffinal metal melt.
Above-mentioned method wherein, is carried out Temperature Field Control to aluminium alloy melt.
Above-mentioned method; Wherein, the low levels duraluminum comprises low levels aluminum titanium alloy and low levels aluminium zirconium alloy entirely, with the low levels aluminum titanium alloy; Wherein titanium content is 0.5-1.5wt%, low levels aluminium zirconium alloy; Wherein zirconium content is that 0.5-1.5wt% separates respectively to concentrate and obtains high-content aluminium titanium master alloy, and wherein titanium content is 4.0-5.0wt%, high-content aluminium zirconium hardener, and wherein zirconium content is 5.0-6.0wt%; Corresponding separation enrichment factor is 40%-80%; The raffinal metal purity that obtains is more than the 99.30wt%.
Above-mentioned method wherein can repeating step (2), (3), (4), carries out separating for several times and concentrates, and obtains more high-load aluminium base master alloy.
Above-mentioned method, the external force field that wherein can superpose quickens to separate concentrating, and separates enrichment factor and production efficiency thereby improve.
Above-mentioned method, wherein external force field is a centrifuge field.
Above-mentioned method, the titanium content limit is 37wt% in the high-content aluminium titanium master alloy that wherein obtains; The zirconium content limit is 52wt% in the high-content aluminium zirconium hardener that obtains.
Above-mentioned method, wherein preferably, step 2) will wait to separate spissated low levels duraluminum all fusing and insulation, temperature of fusion be under this concentration more than the aluminum alloy melt phase line 70 ℃, and soaking time is 20min;
(3) after the melting and heat preservation time reaches, carry out standing separation, dwell temperature is for being reduced to melt temperature these more than low levels duraluminum solidus curve 90 ℃, time of repose 2h;
Above-mentioned method, wherein preferably, step 2) will wait to separate spissated low levels duraluminum all fusing and insulation, temperature of fusion be under this concentration more than the aluminum alloy melt phase line 50 ℃, and soaking time is 25min;
(3) after the melting and heat preservation time reaches, carry out standing separation, dwell temperature is for being reduced to melt temperature these more than low levels duraluminum solidus curve 70 ℃, time of repose 2.5h;
A kind of device of implementing aforesaid method, this device comprise like lower component: molten aluminium molten bath, heating unit, casting device, and wherein the molten aluminium molten bath can be melting and heat preservation stove or crucible; Heating unit can be induction heating device or resistive heating device or Sweet natural gas heating unit; Casting device can be aluminium ingot horizontal casting machine, aluminium ingot vertical shaft casting machine or metal casting mould.
Wherein, through heating unit preheating molten aluminium molten bath, the molten bath internal temperature is controlled at more than 200 ℃.
Wherein, in process of production, the aluminium base master alloy consumption of low levels is confirmed according to molten aluminium molten bath capacity; Inspection molten aluminium molten bath, heating unit, casting device, and make it to be in health state.
Aluminium base master alloy of high-content and the composition analysis of raffinal metallochemistry use analytical procedures such as chemical method, direct reading spectrometry that high-content aluminium base master alloy interalloy constituent content and raffinal metal purity are analyzed.
The low levels aluminum base alloy is meant that alloying element content is lower than the aluminum base alloy of (grey handbook: " the international trade mark of aluminium intermediate alloy and chemical ingredients ") content in national standard " aluminium intermediate alloy " and the U.S. ASTM standard system; Derive from the domestic and international market, be easy to obtain.
Partition ratio is meant under the certain temperature that when being in equilibrium state, the concentration of component in stationary phase and the ratio of the concentration in moving phase are represented with K.
The application's low levels aluminum base alloy is represented wherein the effectively low aluminum base alloy of alloying constituent content, and the aluminium base master alloy of high-content is represented wherein the effectively high aluminium base master alloy of alloying constituent content.
The invention has the advantages that: utilize the alloying element characteristics that solubility with temperature changes in aluminium; And the intermetallic compound that in liquid aluminium, forms is in the difference of physical propertiess such as fusing point, density and specific conductivity and aluminium; Guaranteeing that the aluminium base master alloy of higher high-content separates under the condition of enrichment factor and production efficiency; Find out best separation thickening temperature field; Under the effect of gravity field or external force field, the alloying element in the liquid low levels alloy is effectively separated, realize the enrichment of alloying element and the purification of base aluminum, prepare aluminium base master alloy of high-content and raffinal metal simultaneously.As low levels aluminum titanium alloy (Al-0.5-1.5%wtTi), low levels aluminium zirconium alloy (Al-0.5-1.5%wtZr) are separated the high titanium aluminum alloy that concentrates with the purification techniques preparation through this, titanium content can reach more than 4.0%; The aluminium base master alloy of high zirconium, zirconium content can reach more than 5.0%; The separation enrichment factor is 40-80wt%; Raffinal metallic aluminium content is more than 99.30%.
It is short that the present invention has technical process, reduced the wasting of resources, cuts down the consumption of energy, and the method for mixing compared, and cost is low, and quality product is high, the promotional value advantages of higher.
Embodiment:
Embodiment 1:
Technological process includes following steps successively:
(1), starting material and device are prepared
Starting material are low-titanium aluminum alloy (A1-1.0%wtTi): solid-state, titanium content is 1.0% in the alloy, and concrete alloy composition is seen table 1.
Table 1 low-titanium aluminum alloy chemical ingredients (%)
| Ti | Fe | Si | Ni | B | V | Al |
| 1.0 | 0.20 | 0.10 | 0.008 | 0.004 | 0.02 | Surplus |
Device is 1.0 tons of silicon carbide crucible, induction heating device, aluminium ingot mold.
(2), silicon carbide crucible preheating
Through induction heating device preheating silicon carbide crucible, the silicon carbide crucible internal temperature is controlled between 600-700 ℃.
(3), fusing and insulation
Solid low levels aluminum titanium alloy is packed into after the preheating silicon carbide crucible, 900 ℃-980 ℃ of induction heating temperature controls, and fusing is incubated soaking time 20-25min later.
(4), standing separation
After the melting and heat preservation time reaches, carry out standing separation, dwell temperature is 700-750 ℃, time of repose 2.0-2.5h.
(5), aluminium base master alloy of high-content and raffinal metal casting
After time of repose reaches, aluminium alloy melt in the crucible is poured in the aluminium ingot mold.Casting is the raffinal metal earlier, and what the back cast is the aluminium base master alloy of high titanium.
(6), chemical composition analysis
Appearance is analyzed in intercepting from the aluminium base master alloy ingot casting of high titanium, uses chemical method to carry out chemical composition analysis, and titanium content is 4.0-5.0wt%, and weight is 120-150kg, and the separation enrichment factor is 70-74wt%; Intercepting is analyzed appearance and is carried out chemical composition analysis on the raffinal cast metals, and aluminum metal purity is 99.30-99.40wt%.
Note:
Separate enrichment factor: concentrate back resulting high-content aluminium base master alloy interalloy element quality and the aluminium base master alloy interalloy of original low levels element mass percent through separating.
ρ=(G
High* N
High)/(G
Low* N
Low)) * 100%
ρ-----separation enrichment factor;
G
High--------separated the aluminium base master alloy quality of the concentrated resulting high-content in back;
N
High-----separate concentrating the aluminium base master alloy concentration of the resulting high-content in back;
G
LowThe aluminium base master alloy quality of-----original low levels;
N
LowThe aluminium base master alloy concentration of-----original low levels;
Embodiment 2:
Technological process includes following steps successively:
(1), starting material and device are prepared
Starting material are the low aluminium base master alloy of zirconium (Al-1.20%wtZr): solid-state, concrete alloy composition is seen table 2.Device is 1.0 tons of silicon carbide crucible, induction heating device, aluminium ingot mold.
Table 2 hangs down the aluminium base master alloy chemical ingredients of zirconium (%)
| Zr | Fe | Si | Ti | Al |
| 1.20 | 0.20 | 0.10 | 0.01 | Surplus |
(2), silicon carbide crucible preheating
Through induction heating device preheating silicon carbide crucible, the silicon carbide crucible internal temperature is controlled between 600-700 ℃.
(3), fusing and insulation
Low levels aluminium zirconium alloy is packed into after the preheating silicon carbide crucible, 770 ℃-850 ℃ of induction heating temperature controls, and fusing is incubated soaking time 20-25min later.
(4), standing separation
After the melting and heat preservation time reaches, carry out standing separation, dwell temperature is 690-730 ℃, time of repose 2.0-2.5h.
(5), aluminium base master alloy of high-content and raffinal metal casting
After time of repose reaches, aluminium alloy melt in the crucible is poured in the aluminium ingot mold.Casting is the raffinal metal earlier, and what the back cast is the aluminium base master alloy of high zirconium.
(6), chemical composition analysis
Appearance is analyzed in intercepting from the aluminium base master alloy ingot casting of high zirconium, uses chemical method to carry out chemical composition analysis, and titanium content is 5.0-6.0wt%, and weight is 120-150kg, and the separation enrichment factor is 75-79wt%; Intercepting is analyzed appearance and is carried out chemical composition analysis on the raffinal cast metals, and aluminum metal purity is 99.30-99.40wt%.
Claims (10)
1. the working method of the aluminium base master alloy of high-content is characterized in that:
(1) need in the low levels duraluminum to separate spissated alloy element concentration >=0.5wt%, this alloying element density is greater than the density of aluminium;
(2) will wait to separate spissated low levels duraluminum all fusing and insulation, temperature of fusion is under this concentration the above 30-100 of aluminum alloy melt phase line ℃, and soaking time is 10-30min;
(3) after the melting and heat preservation time reaches, carry out standing separation, dwell temperature is for to be reduced to above 20-120 ℃ of this low levels duraluminum solidus curve with melt temperature, time of repose 1.0-3.0h;
(4) after time of repose reaches, carry out the casting of aluminium base master alloy melt of high-content and raffinal metal melt.
The method of claim 1, wherein the partition ratio of this alloying element in aluminium greater than 1.
3. the method for claim 1, wherein after standing separation, lower leaf on the aluminium alloy melt in the molten bath, wherein lower floor is the aluminium base master alloy melt of spissated high-content, the upper strata is the raffinal metal melt.
4. the method for claim 1, wherein aluminium alloy melt is carried out Temperature Field Control.
5. the method for claim 1; Wherein, the low levels duraluminum comprises low levels aluminum-titanium alloy and low levels aluminum-zirconium alloy entirely, with the low levels aluminum titanium alloy; Wherein titanium content is 0.5-1.5wt%, low levels aluminium zirconium alloy; Wherein zirconium content is that 0.5-1.5wt% separates respectively to concentrate and obtains high-content aluminium titanium master alloy, and wherein titanium content is 4.0-5.0wt%, high-content aluminium zirconium hardener, and wherein zirconium content is 5.0-6.0wt%; Corresponding separation enrichment factor is 40%-80%; The raffinal metal purity that obtains is more than the 99.30wt%.
6. like the described method of claim 1-5, wherein can repeating step (2), (3), (4), carry out separating for several times and concentrate, obtain more high-load aluminium base master alloy.
7. like the described method of claim 1-5, the external force field that wherein can superpose quickens to separate concentrating, and separates enrichment factor and production efficiency thereby improve.
8. method as claimed in claim 7, wherein external force field is a centrifuge field.
9. like the described method of claim 1-5, the titanium content limit is 37wt% in the high-content aluminium titanium master alloy that wherein obtains; The zirconium content limit is 52wt% in the high-content aluminium zirconium hardener that obtains.
10. device of implementing the said method of claim 1-9, this device comprises like lower component: molten aluminium molten bath, heating unit, casting device, wherein the molten aluminium molten bath can be melting and heat preservation stove or crucible; Heating unit can be induction heating device or resistive heating device or Sweet natural gas heating unit; Casting device can be aluminium ingot horizontal casting machine, aluminium ingot vertical shaft casting machine or metal casting mould.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887016A (en) * | 2014-03-04 | 2014-06-25 | 安徽海纳电缆集团有限公司 | Processing technology of aluminium alloy for cable conductor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5197521A (en) * | 1975-02-26 | 1976-08-27 | ||
| WO2004015152A1 (en) * | 2002-08-06 | 2004-02-19 | Peak Werkstoff Gmbh | Method for binding hydrogen in light metal materials |
| CN101514418A (en) * | 2009-01-09 | 2009-08-26 | 毕祥玉 | Aluminum titanium intermediate alloy and preparation method thereof |
| CN101748291A (en) * | 2010-01-28 | 2010-06-23 | 上海交通大学 | High-purity aluminum purification device based on segregation method |
-
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- 2012-06-06 CN CN201210201525.2A patent/CN102732753B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5197521A (en) * | 1975-02-26 | 1976-08-27 | ||
| WO2004015152A1 (en) * | 2002-08-06 | 2004-02-19 | Peak Werkstoff Gmbh | Method for binding hydrogen in light metal materials |
| CN101514418A (en) * | 2009-01-09 | 2009-08-26 | 毕祥玉 | Aluminum titanium intermediate alloy and preparation method thereof |
| CN101748291A (en) * | 2010-01-28 | 2010-06-23 | 上海交通大学 | High-purity aluminum purification device based on segregation method |
Non-Patent Citations (1)
| Title |
|---|
| 胡迟 编译: "铝精炼法", 《轻金属》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887016A (en) * | 2014-03-04 | 2014-06-25 | 安徽海纳电缆集团有限公司 | Processing technology of aluminium alloy for cable conductor |
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