• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method for the addition of manganese to a molten magnesium bath by mixing the manganese to be dissolved in a finely divided form with magnesium in a finely divided form and adding the mixture to the molten magnesium.
    公开号:SU1255058A3
    申请号:SU792856948
    申请日:1979-12-17
    公开日:1986-08-30
    发明作者:Джеймс Косто Тимоти
    申请人:Элкем Металз Компани (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the metallurgy of non-ferrous metals and is aimed at improving the technology of introducing the addition of manganese into the molten magnesium bath.
    The purpose of the invention is to increase the efficiency of manganese absorption by molten magnesium.
    In the production of magnesium, in many cases it is required to add manganese for refining and doping. For example, manganese is added to magnesium in amounts of up to 2% by weight in order to remove iron from the baths and increase the corrosion resistance and mechanical properties of the molded product from magnesium. The usual industrial absorption of manganese is approximately 50–80%, and the dissolution time is long. Since manganese has a melting point of 243 ° C and magnesium is 650 ° C, the dissolution time of an additional electrolytic manganese (e.g., flaky) additive is about 2 hours at a normal temperature (750 -800 C) magnesium baths,
    In accordance with the invention, electrolytic metal manganese is introduced into a bath of molten magnesium in the form of a homogeneous finely divided pressed mixture of manganese and magic powders. The added manganese additive is dissolved in the molten magnesium bath at a significantly higher rate than with the addition of elemental manganese.
    The proposed method makes it possible to economically, quickly and efficiently add manganese to magnesium.
    It has been found that in accordance with the invention, when finely divided manganese is mixed with finely divided magnesium and the resulting mixture is introduced into a bath of molten magnesium, the interaction between these metals causes a rapid dissolution of manganese in the bath of molten magnesium,
    In a particular embodiment, finely divided manganese and finely divided magnesium are mixed with each other. All fine manganese and magnesium particles should preferably be smaller than 30 mesh (30 D) j especially when all particles are 20 mesh (20 D) and smaller. Preferred
    5 b 5
    five

    0 5
    0
    five
    the proportions of the mixture are in the range of 40-60 wt.% manganese and 60-40 wt. 7, magnesium. The most preferred mixture is 50 wt.% Manganese and 50 wt.% Magnesium. In carrying out the invention, it is preferable to use technically pure magnesium and electrolytic manganese.
    It has been established that up to 50% of magnesium and mixtures of manganese with magnesium can be replaced by aluminum without any harmful effect on the interaction between metals, in which manganese is dissolved in a pool of dissolved magnesium, however, in some applications in the art may find the simultaneous addition of aluminum and manganese in a magnesium bath undesirable,
    According to the invention, a mixture of finely divided manganese and magnesium is added to a traditional bath of molten magnesium, for example, 99.9% of technically pure electrolytic magnesium. The molten magnesium is maintained at 69b-800 ° C, preferably 700-760 ° C.
    In a preferred embodiment, a mixture of manganese with magnesium is added to a molten magnesium bath in the form of compacts (tablets). The mixture of finely divided manganese and magnesium is pressed (compacted) in the form of a compact (tablet), preferably having a density sufficient to allow it to be immersed under its own weight in a bath of molten magnesium. A npeccoBKii density is appropriate in the range of about 2.1 to 3.0 g / cm, and when this density is about 86-93% of the maximum theoretical density of the selected manganese-magnesium mixture (the maximum theoretical density is molten and fully melted fused with each other components). t
    The preferred density is about 90-93% of the maximum theoretical density. For the most preferred mixture (50 wt.% Manganese and 50 wt.% Magnesium), the preferred density of the compact is 2.7 g / cm. The amount of manganese added to the magnesium bath is regulated by the number of added compacts, taking into account the amount of manganese found in each press. 31
    scoop. Manganese additives can be easily added up to 2% by weight.
    A series of experiments were carried out in which tablets of a homogeneous mixture (50% manganese and 50% magnesium) in accordance with the invention were introduced into a molten magnesium bath at different bath temperatures, providing the addition of manganese additives, which amounted to 0.5; 1.0 and 1.5% by weight of molten magnesium in the bath, as well as experiments using tablets, in which half of the magnesium was replaced by aluminum, i.e. the homogeneous mixture consisted of 50% manganese, 25% magnesium and 25% aluminum.
    Manganese in mixtures for all I00% consisted of finely divided electrolytic scaly manganese. Magnesium represented the grain
    g 50 50
    725 0.5 35 2.5 89
    2 50 50
    “About 0.5 J5 2.5 89
    3 50 50
    800 0.5 35 2.5 89
     50 50
    725 1.0 35 2.59 92
    5 50 50
    560 J, 0 33 2.59 92
    550584
    99.9% technically pure magnesium, aluminum - finely ground 99.9% technically pure aluminum powder. The mixtures are bent and then pressed into tablets on a hydraulic press at the indicated pressures.
    The bath consisted of 99.9% of technically pure molten magnesium stabilized in argon at a certain temperature in a graphite crucible using an induction furnace to create a temperature of t5 bath. The surface of the magnesium bath was coated with flux consisting of KCl, MgCl j, BaCl j CaF-j.
    The parameters for these experiments and the results of these experiments are shown in table 20.
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    Compiled by G. Titov Editor M. Petrov Tehred I. Veres
    Order 4734/60 Circulation 567 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, st. Project, 4
    3.06 93
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    Proofreader T. Kolb
    权利要求:
    Claims (4)
    [1]
    I. METHOD FOR INTRODUCING Manganese into the bath of molten magnesium, including the use of electrolytic metal manganese, characterized in that, with the whole increase in the efficiency of assimilation of manganese, the latter is introduced in the form of a pressed mixture of its powder with magnesium powder having a density of 86-93Z from the maximum theoretical density , with a ratio of manganese to magnesium in the mixture 1: 1 by weight.
    [2]
    2. The method according to π. 1, with the fact that Join and th with the fact that the powders of the components of the mixture have a particle size less than
    20 mesh
    [3]
    3. The method according to PP. I and 2, otl-ающийся, wherein the powders of the components of the mixture have a particle size of less than 35 mesh.
    [4]
    4. The method according to PP. 1-3, with the fact that up to 50Z of magnesium in the mixture is replaced with aluminum powder.
    CM
    类似技术:
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    CN102978501B|2014-08-06|Method for producing bismuth-ferromanganese alloy metal mould
    US4729874A|1988-03-08|Method of using rapidly dissolving additives for metal melts
    同族专利:
    公开号 | 公开日
    US4179287A|1979-12-18|
    NO152704B|1985-07-29|
    IT1120644B|1986-03-26|
    DE2948883A1|1980-06-26|
    NO793982L|1980-06-20|
    NO152704C|1985-11-06|
    GB2037815A|1980-07-16|
    DE2948883B2|1981-01-15|
    ATA796579A|1983-04-15|
    GB2037815B|1983-09-01|
    IT7950933D0|1979-11-28|
    DE2948883C3|1981-09-10|
    CA1137761A|1982-12-21|
    JPS55115936A|1980-09-06|
    FR2444723A1|1980-07-18|
    AT372979B|1983-12-12|
    FR2444723B1|1987-06-26|
    DD160196A5|1983-05-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2474538A|1944-06-10|1949-06-28|Charles H Mahoney|Alloying manganese with magnesium|
    US2620270A|1950-04-03|1952-12-02|Dow Chemical Co|Method of improving magnesium and the binary magnesium-base alloy of magnesium and manganese|
    US2774664A|1953-10-16|1956-12-18|Dow Chemical Co|Magnesium-base alloy|
    FR1119884A|1954-06-23|1956-06-26|Dominion Magnesium Ltd|Production of magnesium alloys|
    US3592637A|1968-02-26|1971-07-13|Union Carbide Corp|Method for adding metal to molten metal baths|DE3104241A1|1981-02-06|1982-08-19|Eckart GmbH & Co KG, 6490 Schlüchtern|PRESSURE-OPERATED SWIVEL MOTOR|
    GB2117409B|1982-01-21|1985-09-11|Solmet Alloys Limited|An alloying additive for producing alloys of aluminium and a method such an additive|
    GB2286829B|1992-10-21|1996-11-13|Dow Chemical Co|Methods for producing high purity magnesium alloys|
    US5494538A|1994-01-14|1996-02-27|Magnic International, Inc.|Magnesium alloy for hydrogen production|
    AUPP246998A0|1998-03-20|1998-04-09|Australian Magnesium Corporation Pty Ltd|Magnesium alloying|
    US9677364B2|2012-07-31|2017-06-13|Otto Torpedo, Inc.|Radial conduit cutting system and method|
    US9677365B2|2014-08-26|2017-06-13|Richard F. Tallini|Radial conduit cutting system and method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/970,983|US4179287A|1978-12-19|1978-12-19|Method for adding manganese to a molten magnesium bath|
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