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    • 2. 发明申请
    • PROCESS OF LEACHING PRECIOUS METALS
    • 浸出重金属的过程
    • WO2013023297A1
    • 2013-02-21
    • PCT/CA2012/050550
    • 2012-08-14
    • HER MAJESTY THE QUEEN IN RIGHT OF CANADA AS REPRESENTED BY THE MINISTER OF NATURAL RESOURCES CANADAXIA, Chen
    • XIA, Chen
    • C22B3/26C22B11/00C22B3/28
    • C22B11/04C22B3/04
    • The invention relates to modifications of a non-ammoniacal thiosulfate process of leaching precious metals (e.g. gold or silver) from precious metal-containing ores. The process involves leaching the ore with an aqueous lixiviant containing a soluble thiosulfate other than ammonium thiosulfate, a copper compound and an organic compound that serves as a copper ligand (i.e. a ligand-forming compound). Four modifications of this process are effective for increasing the amount of precious metal that can be extracted, reducing the consumption of materials, or for improving the rate of extraction. These four process, which may be used singly or in any combination, include (a) additions of soluble lead (e.g. as lead nitrate), (b) additions of thiourea, (c) increases in dissolved oxygen, and (d) increases of temperature at ambient pressure. This avoids the use environmentally harmful chemicals and allows for extraction from a variety of ores, e.g., containing substantial amounts of sulfides and/or quartz.
    • 本发明涉及从含贵金属的矿石中浸出贵金属(例如金或银)的非氨硫代硫酸盐方法的改进。 该方法包括用除了硫代硫酸铵以外的可溶性硫代硫酸盐,铜化合物和用作铜配体的有机化合物(即配体形成化合物)的含水浸液浸出矿石。 该方法的四个修改对于增加可提取的贵金属的量,减少材料的消耗或提高萃取速率是有效的。 这四种方法可以单独使用或以任意组合使用,包括(a)添加可溶性铅(如硝酸铅),(b)添加硫脲,(c)溶解氧增加,(d)增加 环境压力下的温度。 这避免了使用对环境有害的化学品,并允许从各种矿石中提取,例如含有大量的硫化物和/或石英。
    • 6. 发明申请
    • NIR SPECTROSCOPY METHOD FOR ANALYZING CHEMICAL PROCESS COMPONENTS
    • 用于分析化学工艺组分的近红外光谱法
    • WO2004042375A1
    • 2004-05-21
    • PCT/CA2003/001575
    • 2003-10-15
    • HER MAJESTY THE QUEEN IN RIGHT OF CANADA AS REPRESENTED BY THE MINISTER OF NATURAL RESOURCES CANADA
    • LONG, YichengDABROS, TadeuszHAMZA, Hassan
    • G01N21/35
    • G01N21/359G01N21/3563G01N21/8507
    • A method is described for providing rapid on-line analyses of chemical compositions such as chemical process streams, utilizing near-infrared (NIR) spectroscopy in combination with chemometrics. In the method, for each type of analysis to be conducted, a database is provided by analyzing a series of samples using standard laboratory analytical procedures, utilizing the results as reference values to establish quantitative calibration models from NIR spectroscopy using chemometric techniques and storing this information in a computer database. An NIR spectroscopic system is also provided comprising a transflectance or a transmittance probe coupled via fiber-optic cables to a stable white light source and a spectrograph. The probe is inserted into a test sample or chemical process stream to be analyzed, a stable white light of selected wavelength range is beamed to the probe and the spectra obtained on the spectrograph are recorded. Finally the spectra obtained are correlated to the reference data stored in the computer to obtain a rapid measurement of the analysis desired.
    • 描述了一种用于提供化学组成如化学工艺流的快速在线分析的方法,其利用近红外(NIR)光谱与化学计量学结合。 在该方法中,对于要进行的每种类型的分析,通过使用标准实验室分析程序分析一系列样品来提供数据库,利用结果作为参考值,使用化学计量技术从NIR光谱学建立定量校准模型并存储该信息 在计算机数据库中。 还提供了一种近红外光谱系统,其包括通过光纤电缆耦合到稳定的白光源和光谱仪的透射率或透射率探测器。 将探针插入待分析的测试样品或化学过程流中,将所选波长范围的稳定白光束照射到探针上,并记录在光谱仪上获得的光谱。 最后,所获得的光谱与存储在计算机中的参考数据相关,以获得所需分析的快速测量。