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    • 2. 发明授权
    • Process for manufacture of metallic magnesium
    • 金属镁的制造方法
    • US4437886A
    • 1984-03-20
    • US373267
    • 1982-04-29
    • Hirohisa MiuraHiroshi SatouToshio Natsume
    • Hirohisa MiuraHiroshi SatouToshio Natsume
    • C22B26/22
    • C22B26/22Y02P10/212
    • A process for manufacture of metallic magnesium. A mixture of a first quantity of magnesium oxide, a second quantity of a carbide forming material which is either a material selected from the group of materials consisting of calcium, aluminum, boron, silicon, calcium oxide, aluminum oxide, boron oxide, and silicon oxide, or is a mixture of two or more of these materials, and whose weight is 10% or less than the weight of the first quantity, and a third quantity of carbon which is at least the equivalent mol weight of that of the magnesium oxide plus the carbide forming material, is heated within a reducing furnace at a pressure between about 5 and 200 torr and at a temperature of at least 1600.degree. C. The carbide forming material combines with the carbon to form carbide, which induces simultaneous reducing reaction as that by carbon and reduces the magnesium oxide, releasing magnesium vapor, which is rapidly cooled down by adiabatic expansion to generate metallic magnesium, while the carbide forming material returns to oxide form. The carbide forming material is recycled again, to repeatedly form carbide and repeatedly reduce more magnesium oxide.
    • 金属镁的制造方法。 第一量的氧化镁,第二量的碳化物形成材料的混合物,其是选自由钙,铝,硼,硅,氧化钙,氧化铝,氧化硼和硅的材料组成的材料 或者是这些材料中的两种或更多种的混合物,其重量为第一量的重量的10%或更少,以及与氧化镁的至少等摩尔重量的第三量的碳 加上碳化物形成材料,在还原炉内以约5至200托的压力和至少1600℃的温度加热。碳化物形成材料与碳结合以形成碳化物,其诱导同时还原反应为 通过碳并减少氧化镁,释放镁蒸气,其通过绝热膨胀快速冷却以产生金属镁,同时碳化物形成材料返回到氧化物形式。 碳化物形成材料再次被再循环,以反复形成碳化物并反复减少更多的氧化镁。
    • 10. 发明授权
    • Device and method for making and collecting fine metallic powder
    • 制造和收集细金属粉末的装置和方法
    • US4533382A
    • 1985-08-06
    • US608112
    • 1984-05-08
    • Hirohisa MiuraHiroshi SatoToshio NatsumeHidenori Katagiri
    • Hirohisa MiuraHiroshi SatoToshio NatsumeHidenori Katagiri
    • B22F9/12B22F9/00
    • B22F9/12
    • Fine powder of a metal is made by vaporizing the metal in a vaporization chamber, mixing the metallic vapor with an inert carrier gas, and then adiabatically expanding the mixture through a nozzle, which preferably is a convergent-divergent nozzle. A jet flow from the nozzle is very rapidly cooled by this adiabatic expansion, which quickly condenses the metal vapor in the jet flow into very fine particles. Optionally the jet flow is directed against a metal powder collecting means, which may be a collection plate, but preferably is a bath of oil which entrains the particles and keeps them from agglomerating together by partially neutralizing their surface activity. Thus fine metal powder with particle diameters of the order of a few hundreds of angstroms can be economically produced.
    • 通过在蒸发室中蒸发金属,将金属蒸气与惰性载气混合,然后通过优选为收敛扩散喷嘴的喷嘴绝热地使混合物膨胀而制成金属细粉末。 来自喷嘴的射流通过这种绝热膨胀非常快速地冷却,这使得喷射流中的金属蒸气迅速冷凝成非常细的颗粒。 任选地,喷射流被引向金属粉末收集装置,金属粉末收集装置可以是收集板,但是优选地是一种油的浴,其夹带颗粒并通过部分中和它们的表面活性使它们不凝聚在一起。 因此,可以经济地制造粒径为几百埃的细金属粉末。