EP0283518B1 - Procede pour l'obtention d'un alliage d'alumino-silicium contenant 2-22 % en poids de silicium - Google Patents

Procede pour l'obtention d'un alliage d'alumino-silicium contenant 2-22 % en poids de silicium Download PDF

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Publication number
EP0283518B1
EP0283518B1 EP86907018A EP86907018A EP0283518B1 EP 0283518 B1 EP0283518 B1 EP 0283518B1 EP 86907018 A EP86907018 A EP 86907018A EP 86907018 A EP86907018 A EP 86907018A EP 0283518 B1 EP0283518 B1 EP 0283518B1
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EP
European Patent Office
Prior art keywords
melt
silicon
temperature
furnace
alloy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86907018A
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German (de)
English (en)
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EP0283518A1 (fr
EP0283518A4 (fr
Inventor
Vadim Petrovich Ivchenkov
Nikolai Andreevich Kaluzhsky
Eduard Alexeevich Isidorov
Viktor Georgievich Sirotenko
Viktor Semenovich Shusterov
Gennady Alexandrovich Pakhomov
Fedor Konstantinovich Teplyakov
Oleg Sergeevich Khromovskikh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNY INSTITUT ALJUMINIEVOI MAGNIEVOI I ELEKTRODNOI PROMYSHLENNOSTI
SPETSIALNOE KONSTRUKTORSKOE BJURO MAGNITNOI GIDRODINAMIKI INSTITUTA FIZIKI AKADEMII NAUK LATVIISKOI SSR
Original Assignee
VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNY INSTITUT ALJUMINIEVOI MAGNIEVOI I ELEKTRODNOI PROMYSHLENNOSTI
SPETSIALNOE KONSTRUKTORSKOE BJURO MAGNITNOI GIDRODINAMIKI INSTITUTA FIZIKI AKADEMII NAUK LATVIISKOI SSR
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Application filed by VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNY INSTITUT ALJUMINIEVOI MAGNIEVOI I ELEKTRODNOI PROMYSHLENNOSTI, SPETSIALNOE KONSTRUKTORSKOE BJURO MAGNITNOI GIDRODINAMIKI INSTITUTA FIZIKI AKADEMII NAUK LATVIISKOI SSR filed Critical VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNY INSTITUT ALJUMINIEVOI MAGNIEVOI I ELEKTRODNOI PROMYSHLENNOSTI
Publication of EP0283518A1 publication Critical patent/EP0283518A1/fr
Publication of EP0283518A4 publication Critical patent/EP0283518A4/fr
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Publication of EP0283518B1 publication Critical patent/EP0283518B1/fr
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Classifications

    • 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
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium

Definitions

  • the invention relates to the field of non-ferrous metallurgy and the production of alloys and relates in particular to methods for producing an aluminum-silicon alloy with a silicon content of 2 to 22 mass%.
  • a method for producing an aluminum-silicon alloy with a silicon content of 2 to 22% by mass which consists in placing crystalline silicon on the hearth surface of a flame furnace, the applied crystalline silicon having the shape of a cone which is molten Pour aluminum into the trough of said flame furnace at a temperature of 780 to 820 ° C and periodically mix the resulting aluminum-silicon melt by hand;
  • a disadvantage of the known methods is that the process for producing the aluminum-silicon alloy is to be carried out at higher temperatures (780 to 820 ° C.), which leads to an increase in the hydrogen and aluminum oxide content of the finished alloy. This in turn reduces the quality of the alloy to be produced and increases irretrievable losses in feed material.
  • This object is achieved in that a method for producing an aluminum-silicon alloy with a silicon content of 2 to 22 mass% is proposed, which provides for the task of crystalline silicon on the hearth surface of a flame furnace, the given crystalline silicon being in the form of a Kegels has, the pouring of the molten aluminum into the trough of said flame furnace at a temperature of 780 to 820 ° C and the mixing of the resulting aluminum-silicon melt by means of a shaped jet of the same melt, in which, according to the invention, the melt jet onto the base of the Cone of the charged crystalline silicon is passed, the speed of the melt jet in the axial direction of the same being kept in a range from 0.5 to 0.8 m / s, simultaneously with the start of mixing, the temperature of the melt in the furnace trough to 670 to 750 ° reduced and the mixing of the Schme lze is carried out at the temperature mentioned.
  • the temperature of the process control (temperature in the furnace trough) is reduced to 670 to 750 ° C., because this ensures better conditions for heat and mass transfer in the melt volume, which allows the hydrogen and aluminum oxide content of the melt reduce and thus improve the alloy quality and significantly reduce the irretrievable losses of feed material.
  • energy consumption is significantly reduced when the process is carried out under the lower temperature conditions.
  • the molten aluminum is in the tub of the Flame furnace cast in at a temperature of 780 to 820 ° C.
  • the casting temperature mentioned is due to the special features of the operation of a flame furnace and the conditions of the process control in the production of the alloy in the furnace.
  • the melt jet is directed onto the base of the cone of the applied crystalline silicon at a speed of 0.5 to 0.8 m / s in the axial direction of the jet.
  • the supply of the melt jet in the axial direction of the same at a speed of less than 0.5 m / s is unsuitable because the movement of the melt in the tub changes into the area of a calm laminar flow, which reduces the effectiveness of the mixing (ie the effectiveness of the Heat and material exchange in the melting volume of the furnace pan is reduced).
  • the supply of the melt jet in the axial direction of the same at a speed above 0.8 m / s is not economically justifiable because no further increase in the indicators of the effectiveness of the process control can be achieved.
  • the temperature of the melt in the furnace trough is reduced to 670 to 750 ° C. at the same time as the mixing of the melt begins and the mixing of the melt is carried out at the temperature mentioned. It is not recommended to run the process at temperatures below 670 ° C because this increases the viscosity of the melt, which leads to a reduction in the mixing efficiency and consequently to an increase in the dissolution time of the silicon.
  • the process control at temperatures above 750 ° C causes an undesirable increase in the melt solubility of the hydrogen and an increase in the loss of aluminum due to its oxidation.
  • the method according to the invention for producing an aluminum-silicon alloy with a silicon content of 2 to 22 mass% is carried out as follows.
  • the required amount of crystalline silicon is placed on the hearth surface of a flame furnace through a loading opening in the furnace ceiling, the added crystalline silicon having the shape of a cone.
  • the required amount of molten aluminum is then poured into the furnace pan at a temperature of 780 to 820 ° C.
  • the resulting aluminum-silicon melt is then mixed through a shaped jet of the same melt.
  • the melt jet can, for example, with the help of centrifugal pumps from the company "Carborundum” (USA), gas dynamic pumps, electromagnetic mixers (AD Andreev, VV Gogin, GS Makarov “High-performance melting of aluminum alloys", published in 1980, publisher "Metallurgiya", Moscow, pages 89 to 95.
  • the molded melt jet is guided onto the base of the cone of the charged crystalline silicon, the velocity of the melt jet in the axial direction thereof being in a range of 0.5 to 0.8 m / s Mixing reduces the temperature in the furnace trough to 670 to 750 ° C.
  • the mixture is mixed at this temperature, and the temperature can be reduced to the stated values by switching off the heat source or by inevitably removing the heat to reuse them for other technological processes.
  • the maturity of the melt is determined by a quick analysis to determine the content of the main components and additives in the alloy, after which the finished alloy is poured into molds.
  • 2950 kg of crystalline silicon are placed on the stove surface of a flame furnace with a furnace content of 25000 kg of molten metal through a loading opening in the furnace roof, which takes on a conical shape on the stove surface.
  • 22050 g of molten aluminum are poured into the furnace pan at a temperature of 820 ° C.
  • the calculated silicon content of the laying is 11.7% by mass.
  • the resulting aluminum-silicon melt is mixed by a shaped jet of the same melt.
  • the beam is shaped using an electromagnetic mixer and the beam is directed onto the base of the cone of the applied crystalline silicon at a speed of 0.8 m / s in the axial direction thereof. Simultaneously with the beginning of the mixing, the melting temperature in the furnace trough is reduced to 700 ° C. by switching off the heat source, and the mixing of the melt is carried out at this temperature.
  • the ripeness of the alloy is determined by a rapid analysis to determine the content of the main components and additives in the alloy, after which the finished alloy with a silicon content of 11.4% by mass is poured into a casting mold.
  • the effectiveness of the method according to the invention was assessed on the basis of the results of an analysis of the alloy for determining the hydrogen and aluminum oxide content and of the slag composition. For comparison, the effectiveness of the known methods was assessed using the same indicators.
  • the hydrogen and aluminum oxide content of the alloy was determined according to the methodology described in the book by MB Altmann, AA Lebedev, MV Chukhrov, "Melting and Casting of Light Metal Alloys", published in 1969, Verlag “Metallurgiya”, Moscow, pages 663 to 674 .
  • the analysis of the slag compositions was carried out according to known analysis methods.
  • Table 2 below gives indicators of the effectiveness of the method according to the invention and of the known methods, which were determined using the above-mentioned methodologies.
  • a comparative analysis of the information given in Table 2 shows that the use of the method according to the invention makes it possible to reduce the hydrogen content of the finished alloy on average by 22%, the aluminum oxide content in the form of disperse inclusions - on average by 50%, and the aluminum oxide content Form of larger inclusions and cast skins - to reduce on average by 70%.
  • the total slag content of aluminum and silicon is reduced by an average of 25%.
  • the present invention can be applied in the field of metallurgy of non-ferrous metals and alloys for producing an aluminum-silicon alloy with a silicon content of 2 to 22 mass%.
  • This alloy can be used to produce castings for the needs of the automotive industry, de motor vehicle and tractor construction and in the production of mass-produced products.

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

Abstract

Le procédé consiste à charger du silicium cristallin, sous forme d'un cône, sur le foyer d'un four à réverbères, à verser l'aluminium liquide dans le bain du four à une température de 780-800°C en brassant la coulée d'alumino-silicium au moyen d'un jet formé par ladite coulée, le jet étant dirigé vers la base du cône de silicium chargé à une vitesse axiale du jet de 0,5 à 0,8 m/sec; en même temps que le démarrage du brassage, la température de la coulée du bain du four est abaissée à 670-750°C et on continue le brassage à cette température. L'alliage peut être utilisé dans l'industrie des automobiles et des tracteurs, ainsi que pour la production de biens de consommation.

Claims (1)

  1. Procédé pour la production d'un alliage d'aluminium-silicium ayant une teneur en silicium de 2 à 22% en masse, dans lequel on dépose du silicium cristallin sous forme d'un cône sur la sole d'un four à réverbère et on coule de l'aluminium en fusion dans la cuve de four à réverbère à une température de 780 à 820°C, et on brasse la coulée d'aluminium-silicium résultante au moyen d'un jet formé de la coulée, caractérisé en ce que l'on envoie le jet de coulée à une vitesse dans la plage de 0,5 à 0,8 m/s dans la direction de son axe, sur la base du cône constitué de silicium cristallin, en même temps que le début du brassage on abaisse à 670―750°C la température de la coulée dans la cuve du four et le brassage de la coulée est effectué dans ladite plage de températures.
EP86907018A 1986-09-29 1986-09-29 Procede pour l'obtention d'un alliage d'alumino-silicium contenant 2-22 % en poids de silicium Expired - Lifetime EP0283518B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SU1986/000095 WO1988002410A1 (fr) 1986-09-29 1986-09-29 Procede pour l'obtention d'un alliage d'alumino-silicium contenant 2-22 % en poids de silicium

Publications (3)

Publication Number Publication Date
EP0283518A1 EP0283518A1 (fr) 1988-09-28
EP0283518A4 EP0283518A4 (fr) 1989-01-19
EP0283518B1 true EP0283518B1 (fr) 1990-05-23

Family

ID=21617038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86907018A Expired - Lifetime EP0283518B1 (fr) 1986-09-29 1986-09-29 Procede pour l'obtention d'un alliage d'alumino-silicium contenant 2-22 % en poids de silicium

Country Status (9)

Country Link
US (1) US4808375A (fr)
EP (1) EP0283518B1 (fr)
JP (1) JPH01501320A (fr)
AU (1) AU597926B2 (fr)
DE (1) DE3671473D1 (fr)
IN (1) IN169435B (fr)
NO (1) NO882212D0 (fr)
RO (1) RO101828B1 (fr)
WO (1) WO1988002410A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0611891B2 (ja) * 1989-10-16 1994-02-16 日本金属化学株式会社 ケイ素をアルミニウムに添加する方法
US5366691A (en) * 1990-10-31 1994-11-22 Sumitomo Electric Industries, Ltd. Hyper-eutectic aluminum-silicon alloy powder and method of preparing the same
CN107214309A (zh) * 2017-05-17 2017-09-29 东北大学秦皇岛分校 一种改善高硅铝合金组织性能的方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2727193A1 (de) * 1976-06-17 1977-12-22 Alcan Res & Dev Verfahren und vorrichtung zum ruehren von geschmolzenem metall
SU629429A1 (ru) * 1977-05-16 1978-10-25 Специальное конструкторское бюро магнитной гидродинамики института физики АН Латвийской ССР Миксер
DE2837510A1 (de) * 1977-08-30 1979-03-15 Dolschenkov Verfahren und vorrichtung zur gasdynamischen vermischung von fluessigen metallen
US4235626A (en) * 1978-12-19 1980-11-25 Dolzhenkov Boris S Method and apparatus for stirring molten metal
SU1180396A1 (ru) * 1984-04-02 1985-09-23 Предприятие П/Я А-7504 Способ приготовлени алюминиево-кремниевых сплавов

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB404463A (en) * 1932-06-02 1934-01-18 Aluminium Ltd Improvements in or relating to aluminium silicon alloys and methods of manufacturingthe same
US4046558A (en) * 1976-11-22 1977-09-06 Aluminum Company Of America Method for the production of aluminum-silicon alloys
US4053303A (en) * 1976-12-06 1977-10-11 Aluminum Company Of America Method of carbothermically producing aluminum-silicon alloys
DE2735544A1 (de) * 1977-08-06 1979-02-15 Hansa Metallwerke Ag Steuerscheibensatz fuer eine mischbatterie sowie einen derartigen steuerscheibensatz enthaltende mischbatterie
SE450583B (sv) * 1982-10-22 1987-07-06 Skf Steel Eng Ab Sett att framstella aluminium-kisel-legeringar

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2727193A1 (de) * 1976-06-17 1977-12-22 Alcan Res & Dev Verfahren und vorrichtung zum ruehren von geschmolzenem metall
SU629429A1 (ru) * 1977-05-16 1978-10-25 Специальное конструкторское бюро магнитной гидродинамики института физики АН Латвийской ССР Миксер
DE2837510A1 (de) * 1977-08-30 1979-03-15 Dolschenkov Verfahren und vorrichtung zur gasdynamischen vermischung von fluessigen metallen
US4235626A (en) * 1978-12-19 1980-11-25 Dolzhenkov Boris S Method and apparatus for stirring molten metal
SU1180396A1 (ru) * 1984-04-02 1985-09-23 Предприятие П/Я А-7504 Способ приготовлени алюминиево-кремниевых сплавов

Also Published As

Publication number Publication date
JPH01501320A (ja) 1989-05-11
EP0283518A1 (fr) 1988-09-28
IN169435B (fr) 1991-10-19
NO882212L (no) 1988-05-20
NO882212D0 (no) 1988-05-20
AU597926B2 (en) 1990-06-14
WO1988002410A1 (fr) 1988-04-07
EP0283518A4 (fr) 1989-01-19
RO101828B1 (en) 1992-07-15
DE3671473D1 (de) 1990-06-28
US4808375A (en) 1989-02-28
AU6726387A (en) 1988-04-21

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