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    Pollution-free process for treating copper sulfide flotation concentrates and recovering copper
    1.
    发明授权
    Pollution-free process for treating copper sulfide flotation concentrates and recovering copper 失效
    用于处理硫化铜浮选精矿和回收铜的无污染工艺

    公开(公告)号：US3915689A

    公开(公告)日：1975-10-28

    申请号：US40603973

    申请日：1973-10-12

    申请人： UNIV LELAND STANFORD JUNIOR

    发明人： BARTLETT ROBERT W ,  HAUNG HSIN-HSING

    IPC分类号： C22B1/14 ,  C22B1/02 ,  C22B1/06 ,  C22B1/24 ,  C22B15/00

    CPC分类号： C22B15/0015 ,  C22B1/06 ,  C22B1/2406 ,  C22B15/0006 ,  C22B15/0071 ,  Y02P10/236

    摘要： Copper is recovered from copper sulfide flotation concentrates or any copper sulfide ore without emitting significant amounts of sulfur dioxide (SO2). Balls or pellets of the copper sulfide and lime are formed and roasted to produce a shell of reaction products, which includes anhydrite (CaSO4) and oxidized copper, and to cause oxidation of the copper sulfide minerals at the shell/core interface whereby SO2 formed in the reaction must pass through the shell before release and is largely converted to anhydrite. The temperature is controlled to prevent escalation, thereby to retain the sulfur in solid form during the roast and also to prevent formation of copper ferrite (CuO.Fe2O3). Copper is recovered from the pellet product by sulfuric acid leaching followed by direct electrowinning in a preferred embodiment although solvent extraction/electrowinning and cementation are contemplated.

    摘要翻译： 铜从硫化铜浮选浓缩物或任何硫化铜矿石中回收，而不会发出大量二氧化硫（SO2）。 硫化铜和石灰的球或颗粒被形成并焙烧以产生包括无水石膏（CaSO 4）和氧化铜的反应产物的壳，并且在壳/芯界面处引起硫化铜矿物的氧化，由此形成二氧化硫 反应必须在释放前通过壳，并大部分转化为无水石膏。 控制温度以防止升高，从而在烘烤期间保持固体形式的硫并且还防止铜铁氧体（CuO.Fe 2 O 3）的形成。 在优选实施方案中，通过硫酸浸出然后直接电解沉积从沉淀产物中回收铜，尽管考虑了溶剂萃取/电解沉积和胶结。

    Method and system for acousto-electric scanning
    3.
    发明授权
    Method and system for acousto-electric scanning 失效
    用于电动扫描的方法和系统

    公开(公告)号：US3826866A

    公开(公告)日：1974-07-30

    申请号：US35123773

    申请日：1973-04-16

    申请人： UNIV LELAND STANFORD JUNIOR

    发明人： QUATE C ,  OTTO O ,  MOLL N

    IPC分类号： G10K11/36 ,  H04N3/10 ,  H04N5/30

    CPC分类号： H04N3/10 ,  G10K11/36

    摘要： A method and system for scanning an energetic image to convert the information in the energetic image into an electrical signal. A semiconductor has an electrical field applied thereto to increase the average depletion layer width of the semiconductor by charging the semiconductor surface states. The energetic image is impinged upon the semiconductor and begins discharging the surface states in accordance with intensity variations in the image to produce depletion layer with variations. A piezoelectric substrate is situated adjacent to the semiconductor. A reading acoustic surface wave is propagated along the piezoelectric substrate along one dimension of the semiconductor. The amplitude of the reading wave is modulated by the depletion layer width perturbations of the semiconductor so that an output acoustic wave is formed. The output acoustic wave is converted to an electrical signal having amplitude variations corresponding to the depletion layer width perturbations of the semiconductor. In accordance with one embodiment of the invention two dimensional scanning of the semiconductor is achieved through propagating a plurality of reading acoustic surface waves differing in frequency from each other and spaced from each other along a second dimension of the semiconductor film.

    摘要翻译： 一种用于扫描能量图像以将能量图像中的信息转换为电信号的方法和系统。 半导体具有施加到其上的电场，以通过对半导体表面状态进行充电来增加半导体的平均耗尽层宽度。 能量图像被照射在半导体上，并根据图像中的强度变化开始放电表面状态以产生具有变化的耗尽层。 压电基片位于半导体附近。 读取声表面波沿半导体的一个维度沿着压电基片传播。 读取波的幅度由半导体的耗尽层宽度扰动来调制，从而形成输出声波。 输出声波被转换成具有对应于半导体的耗尽层宽度扰动的振幅变化的电信号。 根据本发明的一个实施例，半导体的二维扫描通过沿着半导体膜的第二维度传播频率彼此不同并且彼此间隔开的多个读取声表面波来实现。