| Experimental study on supercritical phenomena of WO_3 solubility in NaCl-H_2O system |
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| 作者姓名： | 龚庆杰 岑况 於崇文 |
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| 作者单位： | China University of Geosciences，China University of Geosciences，China University of Geosciences Beijing 100083，China，Institute of Mineral Resources，Chinese Academy of Geological Sciences，Beijing 100037，China，Beijing 100083，China，Beijing 100083，China |
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| 基金项目： | 国家自然科学基金，科技部资助项目，the Ministry of Land and Resources of China |
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| 摘 要： | The singular behavior of supercritical fluids was found more than one hundred years ago. In 1879, English scientists Hannay and Hogarth1] firstly studied the properties of supercritical fluids collectively and discovered that ethanol and carbon tetrachlo…
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Experimental study on supercritical phenomena of WO3 solubility in NaCl-H2O system |
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| GONG Qingjie ,CEN Kuang.Experimental study on supercritical phenomena of WO_3 solubility in NaCl-H_2O system[J].Science in China(Earth Sciences),2003,46(7). |
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| Authors: | GONG Qingjie CEN Kuang |
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| Institution: | 1. China University of Geosciences, Beijing 100083, China;Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
2. China University of Geosciences, Beijing 100083, China |
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| Abstract: | The solubility measurements of WO3 in NaCl-H2O system with 4.0% by weight salt were carried out to study the supercritical phenomena of solubility. These experiments were carried out using rapid-quench pressure vessels, with quantitative Na2WO4(2H2O, HCl, NaCl and H2O in Pt capsule to determine the solubility of WO3 from supersaturated solution. The pressure was kept at 34 MPa, which was near the critical pressure 31.4 MPa and the temperatures varied from 250℃ to 550℃. The experimental results indicate that the solubility of WO3 has the features of supercritical phenomenon in critical region and is sensitive to the change of system temperature and solvent density. The temperature and pressure in this experiment are close to those of ore-forming fluids in many tungsten deposits, so the features of supercritical geofluids can be helpful to investigating the ore-forming mechanism of tungsten deposit. |
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| Keywords: | supercritical phenomenon critical region tungsten solubility tungsten deposit |
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