Method for production of silicon
    4.
    发明授权
    Method for production of silicon 失效
    生产硅的方法

    公开(公告)号:US07455822B2

    公开(公告)日:2008-11-25

    申请号:US10490584

    申请日:2003-07-22

    IPC分类号: C01B33/02

    CPC分类号: C01B33/021

    摘要: A process for production of Si, characterized by adding an oxide, hydroxide, carbonate or fluoride of an alkali metal element, or an oxide, hydroxide, carbonate or fluoride of an alkaline earth metal element, or two or more of such compounds, to solid SiO in a total molar amount of from 1/20 to 1000 times with respect to the moles of solid SiO, heating the mixture at between the melting point of Si and 2000° C. to induce a chemical reaction which produces Si and separating and recovering the Si from the reaction by-product, for the purpose of inexpensively and efficiently producing Si from various forms of solid SiO with no industrial value produced from Si production steps and the like.

    摘要翻译: 一种制备Si的方法,其特征在于将碱金属元素的氧化物,氢氧化物,碳酸盐或氟化物,或碱土金属元素的氧化物,氢氧化物,碳酸盐或氟化物,或两种或更多种这些化合物加入到固体 SiO的总摩尔量相对于固体SiO的摩尔数为1/20至1000倍,在Si的熔点和2000℃之间加热混合物以引起产生Si的化学反应并分离和回收 来自反应副产物的Si,目的是从Si生产步骤等产生的没有工业价值的各种形式的固体SiO低成本和有效地生产Si。

    Silicon refining equipment and method for refining silicon

    公开(公告)号:US09937436B2

    公开(公告)日:2018-04-10

    申请号:US14374687

    申请日:2012-02-03

    申请人: Hitoshi Dohnomae

    发明人: Hitoshi Dohnomae

    IPC分类号: C01B33/037 B01D1/30 B01D5/00

    CPC分类号: B01D1/30 B01D5/006 C01B33/037

    摘要: In this method for refining silicon by vacuum melting, the falling of impurity condensate from an impurity trap located above a crucible and contamination of the molten silicon are prevented. A crucible for housing molten silicon, and a heating means for heating the crucible are located inside a treatment chamber equipped with a vacuum pump; further provided are: an impurity trap having an impurity condensation unit for cooling and condensing the vapor of impurities evaporating from the liquid surface of the molten silicon; and a contamination prevention device for preventing contamination of the molten silicon, having an impurity catch unit for catching impurities when impurities trapped by the impurity trap fall.

    METAL OR SEMICONDUCTOR MELT REFINEMENT METHOD, AND VACUUM REFINEMENT DEVICE
    7.
    发明申请
    METAL OR SEMICONDUCTOR MELT REFINEMENT METHOD, AND VACUUM REFINEMENT DEVICE 审中-公开
    金属或半导体熔融精炼方法和真空精炼装置

    公开(公告)号:US20150082942A1

    公开(公告)日:2015-03-26

    申请号:US14374941

    申请日:2012-02-06

    摘要: An objective of the present invention is, in refining a metal or a semiconductor melt, without impairing refining efficiency, to alleviate wear and tear commensurate with unevenness in a crucible caused by instability in melt flow, and to allow safe operation over long periods of time such that leakages from the crucible do not occur. Provided is a metal or semiconductor melt refining method, in which, by using an AC resistance heating heater as a crucible heating method, the melt is heat retained and mixed by a rotating magnetic field which is generated by the resistance heating heater. The metal or semiconductor melt refinement method and a vacuum refinement device which is optimal for the refinement method are characterized in that, in order that a fluid instability does not occur in the boundary between the melt and the bottom face of the crucible when the melt is rotated by the rotating magnetic field, with a kinematic viscosity coefficient of the melt designated ν (m2/sec), the radius of the fluid surface of the melt designated R (m), and the rotational angular velocity of the melt designated Ω (rad/sec), the operation is carried out such that the value of a Reynolds number (Re) which is defined as Re=R×(Ω/ν)̂(1/2) does not exceed 600.

    摘要翻译: 本发明的目的是在不损害精炼效率的同时,在精炼金属或半导体熔体的同时,减轻由熔体流动不稳定引起的坩埚中的不均匀度的磨损和撕裂,并允许长时间的安全运行 从而不会发生坩埚的泄漏。 提供一种金属或半导体熔融精炼方法,其中通过使用交流电阻加热器作为坩埚加热方法,通过由电阻加热器产生的旋转磁场将熔体热保持并混合。 金属或半导体熔体精制方法和对精制方法最佳的真空精制装置的特征在于,为了在熔体与坩埚的底面之间的边界处不会发生流体不稳定性,当熔体是 通过旋转磁场旋转,熔体的运动粘度系数指定为ngr; (m2 / sec),指定为R(m)的熔体的流体表面的半径以及指定为&OHgr的熔体的旋转角速度; (rad / sec),进行操作,使得被定义为Re = R×(&OHgr; /&ngr;)(1/2)的雷诺数(Re)的值不超过600。

    SILICON PURIFICATION APPARATUS AND SILICON PURIFICATION METHOD
    8.
    发明申请
    SILICON PURIFICATION APPARATUS AND SILICON PURIFICATION METHOD 审中-公开
    硅氧烷纯化装置和硅氧烷纯化方法

    公开(公告)号:US20150075223A1

    公开(公告)日:2015-03-19

    申请号:US14372903

    申请日:2012-01-18

    申请人: Hitoshi Dohnomae

    发明人: Hitoshi Dohnomae

    IPC分类号: C01B33/037

    CPC分类号: C01B33/037

    摘要: Provided are a silicon purification apparatus that uses a ring-shaped thermal-insulating lid, which can be replaced while heating a crucible, as a thermal-insulating means for keeping the surface of a silicon melt at a high temperature, and has a simple structure and is easy to produce, said silicon purification apparatus being capable of continuously processing several tens of portions of charged silicon with the crucible heated as is; a silicon purification method that makes use of the silicon purification apparatus; and a purification method. The present invention pertains to a silicon purification apparatus, which is provided with, inside a depressurization chamber equipped with a vacuum pump, a graphite crucible having an opening at the upper end and accommodating silicon therein, and a heating device for heating said crucible, said silicon purification apparatus being characterized by being provided with a ring-shaped thermal-insulating lid that covers the opening of the crucible at the top of the crucible and has an exhaust opening with an area smaller than the surface of the silicon melt inside the crucible, said thermal-insulating lid being capable of being replaced during heating of the crucible in the decompression chamber. The present invention further pertains to a silicon purification method that makes use of the silicon purification apparatus.

    摘要翻译: 提供一种硅纯化装置,其使用可以在加热坩埚时更换的环形绝热盖作为将硅熔体的表面保持在高温的绝热装置,并且具有简单的结构 并且易于生产,所述硅纯化装置能够在坩埚被加热的状态下连续加工数十个带电硅的部分; 使用硅纯化装置的硅纯化方法; 和纯化方法。 本发明涉及一种硅精制装置,该装置设置有配备有真空泵的减压室内,在上端具有开口并容纳硅的石墨坩埚,以及加热上述坩埚的加热装置, 硅纯化装置的特征在于设置有覆盖坩埚顶部的坩埚的开口的环形绝热盖,并且具有面积小于坩埚内的硅熔体表面的排气口, 所述绝热盖能够在对减压室中的坩埚加热期间进行更换。 本发明还涉及利用硅纯化装置的硅纯化方法。

    Silicon refining device
    9.
    发明授权

    公开(公告)号:US10370253B2

    公开(公告)日:2019-08-06

    申请号:US14381150

    申请日:2012-03-09

    IPC分类号: C01B33/037 B01J6/00

    摘要: Provided is a silicon refining device that is used when industrially producing silicon of high purity by vacuum melting, has a high P removal rate and thus high productivity, and is a practical device cost-wise with a simple and cheap device configuration. This silicon refining device comprises, in a decompression vessel provided with a vacuum pump, a crucible that contains a metal silicon material, a heating device that heats the crucible, and a molten metal surface thermal insulation member that covers the upper portion of silicon molten metal and has an exhaust opening with an opening area that is smaller than the silicon molten metal surface area. The molten metal surface thermal insulation member comprises a laminated insulation material with a multilayer structure in which three or more laminates are laminated at predetermined intervals from each other, and which exhibits a radiant heat insulating function based on the multilayer structure.

    SILICON REFINING DEVICE
    10.
    发明申请
    SILICON REFINING DEVICE 审中-公开
    硅精炼装置

    公开(公告)号:US20150033798A1

    公开(公告)日:2015-02-05

    申请号:US14381150

    申请日:2012-03-09

    IPC分类号: C01B33/037

    摘要: Provided is a silicon refining device that is used when industrially producing silicon of high purity by vacuum melting, has a high P removal rate and thus high productivity, and is a practical device cost-wise with a simple and cheap device configuration. This silicon refining device comprises, in a decompression vessel provided with a vacuum pump, a crucible that contains a metal silicon material, a heating device that heats the crucible, and a molten metal surface thermal insulation member that covers the upper portion of silicon molten metal and has an exhaust opening with an opening area that is smaller than the silicon molten metal surface area. The molten metal surface thermal insulation member comprises a laminated insulation material with a multilayer structure in which three or more laminates are laminated at predetermined intervals from each other, and which exhibits a radiant heat insulating function based on the multilayer structure.

    摘要翻译: 本发明提供一种在通过真空熔融工业生产高纯度硅的硅精炼装置中,具有高P去除率和高生产率的硅精炼装置,并且成本低廉的装置结构是实用的装置。 该硅精制装置在具有真空泵的减压容器中包括含有金属硅材料的坩埚,加热坩埚的加热装置和覆盖硅熔融金属上部的熔融金属表面保温部件 并且具有开口面积小于硅熔融金属表面积的排气口。 熔融金属表面绝热构件包括具有多层结构的层压绝缘材料,其中三个或更多个层叠体以预定间隔彼此层叠,并且基于多层结构呈现辐射绝热功能。