EP0269733A1 - Procede pour le raffinage d'un alliage aluminium-silicium de composition eutectique a partir d'additions de fer et de titane - Google Patents

Procede pour le raffinage d'un alliage aluminium-silicium de composition eutectique a partir d'additions de fer et de titane Download PDF

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Publication number
EP0269733A1
EP0269733A1 EP86904459A EP86904459A EP0269733A1 EP 0269733 A1 EP0269733 A1 EP 0269733A1 EP 86904459 A EP86904459 A EP 86904459A EP 86904459 A EP86904459 A EP 86904459A EP 0269733 A1 EP0269733 A1 EP 0269733A1
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Prior art keywords
aluminum
silicon
iron
titanium
mass
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EP86904459A
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German (de)
English (en)
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EP0269733A4 (fr
Inventor
Boris Ivanovich Emlin
Dmitry Vladimirovich Iliinkov
Alexandr Vladimirovich Ventskovsky
Alexandr Nikolaevich Morozov
Gennady Anufrievich Golovko
Viktor Pavlovich Stremedlovsky
Boris Ottovich Vaisman
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Dnepropetrovsky Metallurgichesky Institut Imeni Li Brezhneva
Dneprovsky Aljuminievy Zavod Imeni Sm Kirova
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Dnepropetrovsky Metallurgichesky Institut Imeni Li Brezhneva
Dneprovsky Aljuminievy Zavod Imeni Sm Kirova
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Publication of EP0269733A1 publication Critical patent/EP0269733A1/fr
Publication of EP0269733A4 publication Critical patent/EP0269733A4/fr
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising

Definitions

  • the invention relates to non-ferrous metallurgy and mechanical engineering and relates in particular to processes for refining aluminum-silicon alloys with a eutectic composition of iron and titanium admixtures. With their increased concentrations, these additions worsen the operating characteristics of the alloys mentioned. (GBStroganov, VARotenberg and GBGer "Splavy aluminija s kremniem” (aluminum alloys with silicon), published in 1977, "Metallurgija" publishing house, Moscow, pp. 127, 128, 132 to 134). Refined aluminum-silicon alloys of eutectic composition are used after their alloy in automotive engineering, in tractor construction and in harvesting machine construction for the casting of individual parts of complicated configuration, such as pistons and engine head, high pressure pump housings.
  • a process for refining an aluminum-silicon alloy eutectic composition of iron and titanium admixtures which involves melting the aluminum-silicon alloy eutectic composition with chromium and manganese in such quantities that their total mass-based quantity thus becomes the mass-based total quantity of iron - and titanium admixtures such as (1, 2-2.0): 1 with a mass ratio of chromium to manganese equal to (0.5-1.0): 1, and the cooling of the melt produced to 615 ° C-620 ° C by inserting solid aluminum into it.
  • intermetallic compounds of iron, chromium, manganese, aluminum and silicon and intermetallic compounds of titanium, chromium, manganese, aluminum and silicon are formed. Then the cooled melt at the temperature mentioned - area filtered from iron and titanium, which are present in the composition of the above-mentioned intermetallic compounds (SU, A, 1108122, TPK 3 C 22 C 1/06, Bulletin "Otkrytija, Izobretenija" (Discoveries, Inventions), No. 30, 1984 ).
  • the object of the invention is to select such a mass ratio between chromium, manganese, iron and titanium in the process for refining an aluminum-silicon alloy of eutectic composition of iron and titanium admixtures that it enables the yield of aluminum-silicon melt in the stage of their filtration with decreased aluminum content in the filter residues to increase, the consumption of costly chromium and manganese and the degree of refining of the aluminum-silicon alloy of iron and titanium admixtures while improving the quality of the refined alloy enlarge.
  • This object is achieved in that a process for refining an aluminum-silicon alloy eutectic composition of iron and titanium admixtures is proposed, which involves melting the aluminum-silicon alloy eutectic composition with chromium and manganese, cooling the produced Melt to 590 to 660 0 C and the filtration of the cooled melt in the temperature range mentioned provides, according to the invention the chromium and the manganese are used in such amounts that their mass-based total amount to the mass-based total amount of chromium and titanium admixtures (0.2-1.1): 1 with a mass ratio of chromium to manganese as e (0.1-2 , 0): 1 behaves.
  • chromium and the manganese are used in such amounts that their mass-based total amount to the mass-based total amount of iron and titanium admixtures (0.2-1.1): 1 with a mass ratio of chromium to manganese such as 0.1- 20): 1 behaves, an increase in the yield of aluminum-silicon melt in the filtration stage up to 98.8% with a reduced aluminum content in filter residues on average by 15.4% a decrease in the total consumption of chromium and Manganese achieved an average of 5.75 times and an increase in the degree of refining the aluminum-silicon melt eutectic composition of iron to 80.5% and from titanium to 94% while improving the quality of the refined alloy.
  • the content of iron in the aluminum-silicon alloy is reduced from 0.70 to C, 37 mass% and that of titanium from 0.25 to 0.06 mass%, the relative elongation of the refined alloy increases from 2.5 to 3.7%, that is, 1.5 times.
  • intermetallic compounds crystallize on cooling in the form of polyhedra, globules and dendrites of large dimensions and can be easily separated from the cooled aluminum-silicon melt of eutectic composition in the stage of its filtration from iron and titanium.
  • intermetallic compounds which are listed in Table 1 and which contain high concentrations of iron and titanium, contributes to the reduction in the total mass of the intermetallic compounds. This in turn leads to a reduction in the height of the layer of intermetallic compounds on the filter, which results in a reduction in the losses of the aluminum-silicon alloy crystallized out in the filter residues, a reduction in the aluminum content in the filter residues and an increase in the yield of refined alloy .
  • intermetallic compounds have high concentrations of chromium, manganese, aluminum and low concentrations of iron and titanium, and some of the resulting intermetallic compounds, such as Cr 0.05 Mn 0.2 Al 3.2 , CrAl 7 , MnAl 6 , Cr 0.6 Al 2 Si 0.6 , Mn 0.5 Al 2.2 Si 0.4 contains no iron and titanium at all.
  • the elimination of these intermetallic compounds in the filtration stage of an aluminum-silicon melt of iron and titanium leads to a reduction in the yield of aluminum-silicon alloy while at the same time increasing the aluminum content in the filter residues. If the above-mentioned ratio is increased above the upper limit value, additional consumption of expensive chromium and manganese is also demonstrated without increasing the degree of refining an aluminum-silicon alloy of iron and titanium admixtures.
  • the mass ratio of chromium to manganese is reduced to below 0.1: 1, the conditions for the formation of intermetallic compounds with particularly optimal compositions, which are listed in Table 1, are destroyed in the aluminum-silicon melt. Given a low chromium content and a high manganese content in the aluminum-silicon alloy, the manganese plays a decisive role in the formation of intermetallic compounds with iron and titanium.
  • intermetallic compounds Fe 0.2 Mn 0.3 Al 2.4 Si 0.3 , Mn 0.5 Al 2.3 Si 0.4 'Fe 0.2 Mn 0.3 Al 2.3 ' MnAl 6 are formed , the elimination of which in the filtration step to reduce the yield of refined aluminum-silicon Alloy with an increased aluminum content in the filter residues, which leads to a reduction in the degree of refining of the aluminum-silicon alloy of iron and titanium while at the same time deteriorating the quality of the refined alloy.
  • the aluminum-silicon melt mainly produces intermetallic compounds that are enriched with chromium and aluminum, such as GrAl 7 , Cr 0.5 , Ti 0.5 Si 0.4 Al 1.5 'Fe 0.1 Cr 0.6 Si 1.7 Ti 0.3 ' Cr 0.2 Fe 0.4 Al 2.3 Si 0.4 'Cr 0.3 Fe 0.3 Al 1.7 Si 0.9 ,
  • the registered ratio of the mass-based total amount of chromium and manganese to the mass-based total amount of iron and titanium admixtures is (0.2-1.1): 1 and the mass ratio of chromium to manganese is (0.1-20): 1 are interconnected and, in their entirety, achieve the advantages mentioned above.
  • each of the intermetallic compounds listed in Table 1 changes, based on the total mass of these compounds, in the following ranges in mass%: Cr 0.05 Fe 0.5 Al 1.5 si - from 0.5 to 15; Cr 0.03 Fe 0.5 Al 1.1 Si 1.4 from 0.5 to 30; Fe 0.5 Cr 0.03 Mn 0.02 Al 1.5 Si from 3 to 1 5; Fe 0.5 Cr 0.01 Mn 0.02 Al 1.1 Si 1.4 from 3 to 15; Fe 0.3 Cr 0.4 Si 1.1 Ti 0.6 from 0.5 to 15; Cr 0.3 TiSi 1.3 from 0.5 to 15; Fe 0.4 Cr 0.2 Mn 0.1 Si 1.2 Ti 0.6 from 3 to 20, Fe 0.4 Cr 0.08 Mn 0.07 Al 1.3 SiTi 0.3 from 3 to 20; Fe 0.4 Cr 0.1 AlSi 1.1 , Ti 0.3 from 3
  • intermetallic compounds with a particularly optimal composition for the mentioned case: Cr 0, 03 re 0.5 1.1 Al composition for the above case: Gr re 12:03 0.5 Al 1.1 Si 1.4; Fe 0.3 Cr 0.4 Si 1.1 Ti 0.6 ; Gr 0.3 TiSi 1.3 ; Fe 0.4 Cr 0.1 AlSi 1.1 Ti 0.3 , which contain minimum concentrations of aluminum and maximum concentrations of lisen and titanium.
  • the removal of the iron and titanium in the filtration stage of the aluminum-silicon melt from the composition of the intermetallic compounds mentioned brings about a high effectiveness of the refining method according to the invention.
  • the chromium and the manganese are used in such quantities that their total mass-related quantity is related to the total mass-based quantity of iron and titanium admixtures as (0, 7-1.1): 1, it is recommended to maintain a chromium to manganese mass ratio of (0.1-0.4): 1.
  • the aluminum-silicon melt mainly produces intermetallic compounds with a particularly optimal composition for the case mentioned: Fe 0.5 Cr 0.01 Mn 0.02 Al 1.1 Si 1.4 ; Fe 0.4 Cr 0.2 Mn 0.1 Si 1.2 Ti 0.6 .
  • intermetallic compounds are characterized by a high content of iron and titanium and a low content of chromium, manganese and aluminum.
  • the removal of iron and titanium from the composition of the intermetallic compounds mentioned brings about a high effectiveness of the refining according to the invention.
  • An aluminum-silicon alloy of eutectic composition which is intended for refining iron and titanium admixtures according to the proposed process, can be produced in various known processes.
  • the aluminum-silicon alloy mentioned can be produced, for example, by melting together silicon, aluminum and / or their primary or secondary alloys (silicon aluminum, ferroaluminium and others) in melting mix pans, induction or gas flame furnaces.
  • the metals and alloys listed are introduced in such proportions that the aluminum-silicon alloy produced has a eutectic composition and contains from 10 to 14% by mass of silicon.
  • an aluminum-silicon alloy of eutectic composition which is intended for refining iron and titanium admixtures, can be as follows getting produced.
  • an aluminum-silicon alloy of the following hypereutectic composition in mass% is melted from a briquetted mixture which contains aluminosilicate raw materials and a carbon-containing reducing agent:% - silicon - from 30 to 40; Iron - from 2 to 5; Titanium - from 0.8 to 3; Aluminum - everything else until it is filled to 100.
  • the aluminum-silicon alloy of hypereutectic composition is processed in a pan with flux with the aim of removing non-metallic inclusions and poured into a melt-mixing pan.
  • this is diluted with aluminum and / or with primary or secondary alloys based on aluminum to the eutectic composition (content of silicon in the alloy is from 10 to 14 mass%).
  • the refining method according to the invention allows an aluminum-silicon starting alloy of eutectic composition, which contains iron and titanium additions, to be produced in any known method.
  • a secondary aluminum-silicon alloy which is contaminated with iron and titanium admixtures can be used as a refinable aluminum-silicon alloy. So if the secondary aluminum-silicon alloy has an under- or over-eutectic composition, then it is adjusted to a eutectic composition before it is refined.
  • ligatures Al-Cr and A1-Mn with a specified content of components are produced at a temperature of 750 to 1100 ° C.
  • the ligatures produced are melted with an aluminum-silicon starting alloy of eutectic composition together, which contains iron and titanium admixtures, which are introduced into a melting mixing pan, whereby an aluminum-silicon melt of eutectic composition is obtained.
  • a ligature addition based on aluminum to the aluminum-silicon starting alloy of eutectic composition leads to the accumulation of an aluminum-silicon melt of hypoeutectic composition (i.e. the silicon content is below 10% by mass)
  • the number of ligatures to be introduced into an aluminum-silicon melt is determined on the basis of the required mass ratio of the total amount of chromium and manganese to the total amount of iron and titanium admixtures, as well as the mass ratio of chromium to manganese.
  • the temperature of the aluminum-silicon melt is continuously measured using a pair of tungsten-rhenium thermocouples.
  • the cooled aluminum-silicon melt of eutectic composition is filtered off at a melt temperature of 590 to 660 ° C.
  • the lightly melting aluminum-silicon melt of eutectic composition flows through a filter into an oven vessel located under the filter, and the resulting melting, intermetallic compounds, which contain iron and titanium and have the compositions listed in Table 1, are used in the filtration separated from the aluminum-silicon melt and pass into the filter residues, the refining of the aluminum-silicon alloy being carried out by iron and titanium.
  • the required products are cast from the refined aluminum-silicon alloy in various known processes.
  • the technical-economic indicators of the process according to the invention and the known processes for refining such as the yield of aluminum-silicon melt in the stage of its filtration, the content of aluminum in the filter residues, the consumption of chromium and manganese and the degree of refining
  • An aluminum-silicon alloy of iron and titanium additions are determined as follows.
  • the yield of aluminum-silicon melt in the stage of its filtration is expressed as the ratio of the mass of the aluminum-silicon melt after the filtration to the mass difference of the aluminum-silicon Melt before filtration and the residue of the aluminum-silicon melt in a melt mixing pan after filtration, which is expressed in percent.
  • the aluminum content in the filter residues is determined chemically or by means of spectral analysis of a sample of the filter residues.
  • the consumption of chromium and manganese is defined as the quotient when dividing the mass-based total amount of chromium and manganese to be used and the mass-based total amount of iron and titanium contained in an aluminum-silicon starting alloy.
  • the degree of refining an aluminum-silicon alloy of iron and titanium admixtures is defined as the quotient when dividing the difference between the content of iron and titanium admixtures in an aluminum-silicon melt before and after filtration and the content of the admixtures mentioned in the aluminum-silicon melt before filtration, which is expressed in percent.
  • the refining of an aluminum-silicon alloy of eutectic composition in mass% is carried out: silicon - 13.9, iron - 0.8, titanium - 0.4 and aluminum - everything else up to 100%.
  • the aluminum-silicon alloy to be refined which has a temperature of 750 ° C., is placed in a melt-mixing pan and melted together with the ligatures Al-Mn and Al-Cr produced in an induction furnace, which have a temperature of 800 or 820 ° C.
  • the ligatures are used in such quantities that the mass-based total amount of chromium and manganese relative to the mass-based total amount of iron and titanium additions is 0.2: 1 with a mass ratio of chromium to manganese of 0.1: 1.
  • an aluminum-silicon melt of the following eutectic composition is obtained in mass%; Silicon - 12.5, iron - 0.8, titanium - 0.4, chrome - 0.02, manganese - 0.22 and aluminum - everything else up to 100.
  • the temperature of the aluminum-silicon melt of eutectic composition produced is 760 ° C.
  • solid aluminum is added to the melt in small portions with a mass ratio of aluminum to the melt to be cooled of 0.08: 1, the temperature of the aluminum-silicon to be cooled being Melt continuously is measured. After a temperature of 590 ° C. has been reached, the cooling of the aluminum-silicon melt is stopped and the said melt at this
  • the refined aluminum-silicon melt of eutectic composition that has passed through the filter is collected in the furnace vessel arranged under the filter, the melt mentioned has the following composition in mass%: silicon - 11.3, iron - 0.46, Titanium - 0.12, chromium - 0.01, manganese - 0.08 and aluminum - everything else up to 100%.
  • the filter residues concentrate intermetallic compounds, the composition of which is iron. and contain titanium.
  • the aluminum-silicon alloy to be refined which has a temperature of 670 ° C., is introduced into a melting mixing pan and melted together with the ligatures Al-Cr and Al-Mn produced in an induction furnace, which have a temperature of 900 and 780, respectively ° C.
  • the ligatures are used in such quantities that the mass-based total amount of chromium and manganese relates to the mass-based total amount of iron and titanium admixtures such as 0.65: 1 with a mass ratio of chromium to manganese of 10: 1.
  • the latter With the aim of homogenizing the composition of the aluminum-silicon melt, the latter is mixed for 15 minutes. This gives an aluminum-silicon melt with the following eutectic composition in mass%: silicon - 12.0, iron - 1.4, titanium - 0.7, chromium - 1.24, manganese - 0.12 and aluminum - everything else up to 100.
  • the temperature of the aluminum-silicon melt produced is 690 ° C.
  • the above-mentioned melt is kept at a temperature of 650 ° C. for 30 minutes for the purpose of removing non-metallic inclusions and cooling.
  • the cooled melt is then filtered at this temperature.
  • the refined aluminum-silicon melt collected in a furnace vessel has the following eutectic composition in mass%: silicon - 11.5. Iron - 0.34, titanium - 0.07, chrome - 0.45, manganese - 0.04 and aluminum - everything else up to 100.
  • the refining of an aluminum-silicon alloy with a eutectic composition in mass% is carried out: silicon - 13.6, iron - 2.0, titanium - 1.0, aluminum - everything else up to 100%.
  • the aluminum-silicon alloy to be refined which has a temperature of 730 ° C, is placed in a melting mixing pan and melted together with the ligatures Al-Cr and Al-Mn produced in an induction furnace, which have a temperature of 930 and 780, respectively ° C.
  • the ligatures are used in such quantities that the mass-based total amount of chromium and manganese relates to the mass-based total amount of iron and titanium admixtures such as 1.1: 1 with a mass ratio of chromium to manganese of 20: 1.
  • the latter With the aim of homogenizing the composition of the aluminum-silicon melt, the latter is mixed for 25 minutes. This gives an aluminum-silicon melt of the following eutectic composition in mass%: silicon - 12.2, iron - 2.0, titanium - 1.0, chromium - 3.15, manganese - 0.15 and aluminum - everything else until filling to 100.
  • the temperature of the melt produced is 780 ° 0.
  • the refined aluminum-silicon melt collected in a furnace vessel has the following eutectic composition in mass%: silicon - 11.6, iron - 0.42, titanium - 0.10, chromium - 0.7, manganese - 0.04 and Aluminum - everything else up to 100.
  • the refining of an aluminum-silicon alloy of eutectic composition in mass% is carried out: silicon - 13.9, iron - 0.8, titanium - 0.4, aluminum - everything else up to 100%.
  • the composition of aluminum-silicon alloy to be refined which has a temperature of 700 ° C., is introduced into a melting mixing pan and melted together with the ligatures Al-Cr and Al-Mn produced in an induction furnace, which have a temperature of 850 or Have 780 ° C.
  • the ligatures are used in such quantities that the mass-based total amount of chromium and manganese relates to the mass-based total amount of iron and titanium admixtures such as 0.2: 1 with a mass ratio of chromium to manganese of 20: 1.
  • the refined aluminum-silicon melt collected in a furnace vessel has the following eutectic composition in mass%: silicon - 11.0, iron - 0.30, titanium - 0.05, chromium - 0.10, manganese - 0.005 and aluminum - everything else up to 100.
  • the refining of an aluminum-silicon alloy of eutectic composition in mass% is carried out: silicon - 13.2, iron - 1.4, titanium - 0.7, aluminum - everything else up to 100%.
  • the aluminum-silicon alloy to be refined which has a temperature of 690%, is placed in a melting mixing pan and melted together with the ligatures Al-Cr and Al-Mn produced in an induction furnace, which have a temperature of 860 or 760 ° C.
  • the ligatures are used in such quantities that the mass-based total amount of chromium and manganese relates to the mass-based total amount of iron and titanium admixtures such as 0.45: 1 with a mass ratio of chromium to manganese of 10: 1.
  • the latter With the aim of homogenizing the composition of the aluminum-silicon melt, the latter is mixed for 20 minutes. This gives an aluminum-silicon melt with the following eutectic composition in mass%: silicon - 12.0, iron - 1.4, titanium - 0.7, chromium - 0.86, manganese - 0.085 and aluminum - everything else up to Filling to 100.
  • the temperature of the aluminum-silicon melt produced .. is 700 ° C.
  • the above-mentioned melt is used to remove non-metallic inclusions and
  • the refined aluminum-silicon melt which is collected in a furnace vessel, has the following eutectic composition in mass%: silicon - 11.2, iron - 0.32, titanium -0.05, chromium - 0.30, manganese - 0.03 and aluminum - everything else up to 100.
  • the refining of an aluminum-silicon alloy of eutectic composition in mass% is carried out: silicon - 13.6, iron - 2.0, titanium - 1.0, aluminum - everything else up to filling 100.
  • the aluminum-silicon alloy of the composition mentioned to be refined has a temperature of 750 ° C. It is introduced into a melting mixing pan and melted together with the ligatures Al-Cr and Al-Mn produced in an induction furnace, which have a temperature of 840 or Have 880 ° C.
  • the ligatures are used in amounts such that the weight-based total amount of chromium and manganese to the mass-related total amount of iron and titanium impurities such as 0, 69: 1 in a mass ratio of chromium to manganese is from 0.5: behaves.
  • the latter With the aim of homogenizing the composition of the aluminum-silicon melt, the latter is mixed for 15 minutes. This gives an aluminum-silicon melt of the following eutectic composition in mass%: silicon - 12.2, iron - 2.0, titanium - 1.0, chromium - 0.69, manganese - 1.38 and aluminum - everything else up to 100%.
  • the temperature of the melt produced is 780 ° C.
  • the melt With the aim of removing non-metallic inclusions from the aluminum-silicon melt and cooling them partially, the melt is held for 30 minutes. Then the above-mentioned melt becomes solid aluminum with a mass ratio of aluminum niums to the cooled melt equal to 0.06: 1 with the aim of cooling the latter to a temperature of 625 ° C. The filtration of the aluminum-silicon melt of eutectic composition takes place at the temperature mentioned.
  • the refined aluminum-silicon melt collected in a furnace vessel has the following eutectic composition in mass%: silicon - 11.3, iron - 0.37, titanium - 0.06, chromium - 0.24, manganese - 0.55 and Aluminum - everything else up to 100.
  • the refining of an aluminum-silicon alloy of eutectic composition in mass% is carried out: silicon - 13.9, iron - 0.8, titanium - 0.4, aluminum - everything else up to 100%.
  • the aluminum-silicon alloy to be refined which has a temperature of 680 ° C., is introduced into a melting mixing pan and melted together with the ligatures Al-Cr and Al-Mn produced in an induction furnace, which have a temperature of 850 and 840, respectively ° C.
  • the ligatures are used in such quantities that the mass-based total amount of chromium and manganese relates to the mass-based total amount of iron and titanium admixtures such as 0.7: 1 with a mass ratio of chromium to manganese of 0.4: 1.
  • the refined aluminum-silicon melt collected in a furnace vessel has the following eutectic composition in mass%: silicon - 11.2, iron - 0.36, titanium - 0.08, chromium - 0.10, manganese - 0.25 and Aluminum - everything else up to 100.
  • the refining of an aluminum-silicon alloy of eutectic composition in mass% is carried out: silicon - 13.2, iron - 1.4, titanium - 0.7, aluminum - everything else up to 100%.
  • the aluminum-silicon alloy to be refined which has a temperature of 680 ° C., is introduced into a melting mixing pan and melted together with the ligatures Al-Cr and Al-Mn produced in an induction furnace, which have a temperature of 860 and 880 °, respectively C.
  • the ligatures are used in such amounts that the mass-based total amount of chromium and manganese relates to the mass-based total amount of iron and titanium admixtures such as 0.9: 1 with a mass ratio of chromium to manganese of 0.25: 1.
  • the latter is mixed for 20 minutes.
  • the temperature of the aluminum silicide melt produced is 710 ° C.
  • the above-mentioned melt is kept at a temperature of 660 ° C. for 45 minutes to remove non-metallic inclusions and to cool them.
  • the cooled melt is then filtered at a temperature of 660 ° C.
  • the refined aluminum-silicon melt collected in a furnace vessel has the following eutectic Composition in mass% on: silicon - 11.5, iron 0.37, titanium - 0.09, chrome - 0.14, manganese - 0.35, aluminum everything else up to the filling to 100.
  • the refining of an aluminum-silicon alloy with a eutectic composition in mass% is carried out: silicon - 13.6, iron - 2.0, titanium - 1.0 and aluminum - everything else up to 100%.
  • the aluminum-silicon alloy of the stated composition to be refined which has a temperature of 730 ° C., is introduced into a melting mixing pan and melted together with the ligatures Al-Cr and Al-Mn produced in an induction furnace, which have a temperature of 850 or Have 920 ° C.
  • the ligatures are used in such amounts that the mass-based total amount of chromium and manganese relates to the mass-based total amount of iron and titanium admixtures such as 1.1: 1 1 with a mass ratio of chromium to manganese of 0.1: 1.
  • the latter is mixed for 25 minutes.
  • the temperature of the melt produced is 790 ° C.
  • the aluminum-silicon melt is held for 45 minutes.
  • the temperature of the melt drops to 730 ° C.
  • solid aluminum is added to the melt mentioned, with a mass ratio of aluminum to the melt to be cooled equal to 0.05: 1. Furthermore, the cooled melt is filtered at a temperature of 625 ° C.
  • the refined aluminum-silicon melt collected in a furnace vessel has the following eutectic composition in mass%: silicon - 11.6, iron - 0.39, titanium - 0.08, chromium - 0.10, manganese - 0.65 and Aluminum - everything else up to 100.
  • the refining of an aluminum-silicon alloy with a eutectic composition in mass% is carried out: silicon - 13.9, iron - 0.8, titanium - 0.4, aluminum - everything else up to 100 .
  • the aluminum - silicon alloy to be refined which has a temperature of 750 ° C., is introduced into a melting mixing pan and with the ligatures Al-Cr and Al-Mn produced in an induction furnace, which have a temperature of 870 ° C. or . Have 860 ° C, melted together.
  • the ligatures are used in such amounts that the mass-based total amount of chromium and manganese relates to the mass-based total amount of iron and titanium admixtures such as 1.2: 1 with a mass ratio of chromium to manganese of 0.5: 1.
  • the refined aluminum-silicon melt collected in an oven vessel has the following eutectic composition in mass%: silicon - 12.6, Iron - 0.58, titanium - 0.13, chrome - 0.10, manganese - 0.16 and aluminum - everything else up to 100.
  • the aluminum-silicon alloy of the above-mentioned composition to be refined which has a temperature of 730 ° C., is introduced into a Schumelzmixing pan and with the ligatures Al-Cr and Al-Mn produced in an induction furnace, which have a temperature of 930 ° C or 900 ° C, melted together.
  • the ligatures are used in such quantities that the mass-based total amount of chromium and manganese relates to the mass-based total amount of iron and titanium admixtures such as 2.0: 1 with a mass ratio of chromium to manganese of 1: 1.
  • the latter With the aim of homogenizing the composition of the aluminum-silicon melt, the latter is mixed for 30 minutes. This gives an aluminum-silicon melt of the following eutectic composition in mass% silicon 12.2, iron 2.0, titanium 1.0, chromium 3.0, manganese 3.0 and aluminum - everything else to for filling to 100.
  • the temperature of the melt produced is 800 ° C.
  • the aluminum-silicon melt With the aim of removing non-metallic inclusions from the melt and partially cooling them, the aluminum-silicon melt is held for 45 minutes. The temperature drops to 740 ° C. In order to cool the aluminum-silicon melt of eutectic composition to a temperature of 620 ° C., solid aluminum is added to the melt at a mass ratio of aluminum to the melt to be cooled equal to 0.06: 1. Furthermore, the cooled melt is filtered at a temperature of 620 ° C.
  • the refined aluminum-silicon melt collected in a furnace vessel has the following eutectic composition in mass%: silicon - 12.3, iron - 0.70, titanium - 0.25, chromium - 0.35, manganese - 0.40 and Aluminum - everything else up to 100.
  • the use of the process according to the invention for refining in the production of aluminum-silicon alloys - of eutectic composition, secondary aluminum and aluminum-silicon alloys contaminated with iron and titanium admixtures makes it possible to include them in the production and to produce high-quality primary aluminum-silicon alloys by means of their refining in the process according to the invention of iron and titanium, as a result of which the primary aluminum and crystalline silicon are saved.
  • the invention can be used in non-ferrous metallurgy and in mechanical engineering for refining aluminum-silicon alloys with a eutectic composition of iron and titanium admixtures.
  • the alloys to be refined can be both primary and secondary.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Silicon Compounds (AREA)

Abstract

Procédé pour le raffinage d'un alliage aluminium-silicium de composition eutectique à partir d'additions de fer et de titane consistant à faire fondre un alliage aluminium-silicium de composition eutectique en conjugaison avec du chrome et du manganèse, à refroidir le bain ainsi obtenu jusqu'à une température de 590 - 660°C et à filtrer le bain refroidi à ladite plage de températures, le chrome et manganèse étant utilisés dans des quantités telles que le rapport de leur poids total à celui des additions de fer et de titane est de (0,2 - 1,1): 1, le rapport entre le chrome et le manganèse étant de (0,1 - 20): 1.
EP19860904459 1986-03-21 1986-03-21 Procede pour le raffinage d'un alliage aluminium-silicium de composition eutectique a partir d'additions de fer et de titane. Withdrawn EP0269733A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/SU1986/000023 WO1987005636A1 (fr) 1986-03-21 1986-03-21 Procede pour le raffinage d'un alliage aluminium-silicium de composition eutectique a partir d'additions de fer et de titane
CN86103277.2A CN1004932B (zh) 1986-03-21 1986-05-13 去除铁和钛杂质精炼共晶成分铝硅合金的方法

Publications (2)

Publication Number Publication Date
EP0269733A1 true EP0269733A1 (fr) 1988-06-08
EP0269733A4 EP0269733A4 (fr) 1989-05-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860904459 Withdrawn EP0269733A4 (fr) 1986-03-21 1986-03-21 Procede pour le raffinage d'un alliage aluminium-silicium de composition eutectique a partir d'additions de fer et de titane.

Country Status (7)

Country Link
EP (1) EP0269733A4 (fr)
JP (1) JPS63503312A (fr)
CN (1) CN1004932B (fr)
AU (1) AU586014B2 (fr)
BR (1) BR8607115A (fr)
IN (1) IN162926B (fr)
WO (1) WO1987005636A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102296212A (zh) * 2011-09-13 2011-12-28 成都银河动力有限公司 P-Fe合金型变质剂及其运用在铝硅合金熔炼中的工艺方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02500600A (ja) * 1987-08-25 1990-03-01 ドネプロペトロフスキイ　メタルルルギチェスキイ　インスティトゥト　イメニ　エル　イー　ブレジネヴァ アルミニウム合金を精錬する方法
CN100425714C (zh) * 2006-12-04 2008-10-15 山西泰尔钢铁有限公司 从煤矸石或粉煤灰中精制铝硅合金的方法
CN107400806B (zh) * 2017-06-15 2019-04-16 中北大学 一种用于再生铝富铁相变质的中间合金及其制备方法
EP3643680A1 (fr) * 2018-10-23 2020-04-29 SiQAl UG (haftungsbeschränkt) Production couplée de silicium et d'alumine de grande pureté

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US2464610A (en) * 1940-07-08 1949-03-15 Spolek Method for producing aluminumsilicon alloys
FR976205A (fr) * 1948-10-02 1951-03-15 Alais & Froges & Camarque Cie Procédé d'élimination des impuretés métalliques dans des métaux ou des alliages, en particulier dans des alliages d'aluminium
FR979569A (fr) * 1948-12-03 1951-04-27 Alais & Froges & Camarque Cie Procédé d'élimination des éléments d'alliage indésirables ou des impuretés métalliques dans les métaux ou les alliages, en particulier dans les alliages d'aluminium
DE886077C (de) * 1940-07-05 1953-08-10 Vaw Ver Aluminium Werke Ag Verfahren zur Abtrennung von Eisen aus eisenhaltigen Aluminium-Legierungen
US3198625A (en) * 1961-02-08 1965-08-03 Aluminum Co Of America Purification of aluminum

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SU514903A1 (ru) * 1973-10-08 1976-05-25 Всесоюзный Научно-Исследовательский И Проектный Институт Вторичных Цветных Металлов Способ рафинировани алюминиевых сплавов
US4277280A (en) * 1978-08-23 1981-07-07 Alcan Research And Development Limited Apparatus and method for removal of alkali and alkaline earth metals from molten aluminium
SU1108122A1 (ru) * 1983-05-27 1984-08-15 Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт Им.Л.И.Брежнева Способ переработки высокожелезистого силикоалюмини

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE886077C (de) * 1940-07-05 1953-08-10 Vaw Ver Aluminium Werke Ag Verfahren zur Abtrennung von Eisen aus eisenhaltigen Aluminium-Legierungen
US2464610A (en) * 1940-07-08 1949-03-15 Spolek Method for producing aluminumsilicon alloys
FR976205A (fr) * 1948-10-02 1951-03-15 Alais & Froges & Camarque Cie Procédé d'élimination des impuretés métalliques dans des métaux ou des alliages, en particulier dans des alliages d'aluminium
FR979569A (fr) * 1948-12-03 1951-04-27 Alais & Froges & Camarque Cie Procédé d'élimination des éléments d'alliage indésirables ou des impuretés métalliques dans les métaux ou les alliages, en particulier dans les alliages d'aluminium
US3198625A (en) * 1961-02-08 1965-08-03 Aluminum Co Of America Purification of aluminum

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO8705636A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102296212A (zh) * 2011-09-13 2011-12-28 成都银河动力有限公司 P-Fe合金型变质剂及其运用在铝硅合金熔炼中的工艺方法

Also Published As

Publication number Publication date
BR8607115A (pt) 1988-04-05
JPS63503312A (ja) 1988-12-02
AU6121686A (en) 1987-10-09
EP0269733A4 (fr) 1989-05-26
CN86103277A (zh) 1987-11-25
WO1987005636A1 (fr) 1987-09-24
IN162926B (fr) 1988-07-23
AU586014B2 (en) 1989-06-29
CN1004932B (zh) 1989-08-02

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