| Numerical Modelling of Dissolving and Driving Exploitation of Potash Salt in the Qarhan Playa ? A Coupled Model of Reactive Solute Transport and Chemical Equilibrium in a Multi-component Underground Brine System |
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| 作者姓名： | LI Wenpeng LIU Zhenying |
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| 作者单位： | China Institute of Geo-Environmental Monitoring, No. 20. Dahuisi, Beijing 100081;Shijiazhuang University of Economic, 40 Jianhua Nandajie, Shijiazhuang, Hebei 050031 |
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| 基金项目： | This study was funded by the National Natural Science Foundation of China and supported by the Qinghai Institute of Salt Lake Exploration and Development, to which sincere thanks are expressed by the authors. |
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| 摘 要： | Firstly, the macroscopic chemical equilibrium state of a series of chemical reactions between intercrystal brine and its media salt layer （salt deposit） in Qarhan Salt Lake was studied by using the Pitzer theory. The concept of macroscopic solubility product and its relation with accumulated ore dissolving ratio were presented, which are used in the numerical model of dissolving and driving exploitation of potassium salt in Qarhan Salt Lake. And secondly, with a model forming idea of transport model for reacting solutes in the multi-component fresh groundwater system in porous media being a reference, a two-dimensional transport model coupled with a series of chemical reactions in a multi-component brine porous system （salt deposits） was developed by using the Pitzer theory. Meanwhile, the model was applied to model potassium/magnesium transport in Qarhan Salt Lake in order to study the transfer law of solid and liquid phases in the dissolving and driving process and to design the optimal injection/abstraction strategy for dissolving and capturing maximum Potassium/ Magnesium in the mining of salt deposits in Qarhan Salt Lake.
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| 关 键 词： | 数字模型化 碳酸钾 盐湖 化学平衡 地下盐水系统 |
| 收稿时间： | 2008/6/16 0:00:00 |
| 修稿时间： | 7/1/2008 12:00:00 AM |
Numerical Modelling of Dissolving and Driving Exploitation of Potash Salt in the Qarhan Playa A Coupled Model of Reactive Solute Transport and Chemical Equilibrium in a Multi-component Underground Brine System |
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| Authors: | LI Wenpeng ;LIU Zhenying |
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| Institution: | [1]China Institute of Geo-Environmental Monitoring, No. 20. Dahuisi, Beijing 100081; [2]Shijiazhuang University of Economic, 40 Jianhua Nandajie, Shijiazhuang, Hebei 050031 |
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| Abstract: | Firstly, the macroscopic chemical equilibrium state of a series of chemical reactions between intercrystal brine and its media salt layer (salt deposit) in Qarhan Salt Lake was studied by using the Pitzer theory. The concept of macroscopic solubility product and its relation with accumulated ore dissolving ratio were presented, which are used in the numerical model of dissolving and driving exploitation of potassium salt in Qarhan Salt Lake. And secondly, with a model forming idea of transport model for reacting solutes in the multi‐component fresh groundwater system in porous media being a reference, a two‐dimensional transport model coupled with a series of chemical reactions in a multi‐component brine porous system (salt deposits) was developed by using the Pitzer theory. Meanwhile, the model was applied to model potassium/magnesium transport in Qarhan Salt Lake in order to study the transfer law of solid and liquid phases in the dissolving and driving process and to design the optimal injection/abstraction strategy for dissolving and capturing maximum Potassium/Magnesium in the mining of salt deposits in Qarhan Salt Lake. |
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| Keywords: | salt lake macroscopic solubility product transport model of reacting solutes dissolving and driving exploitation |
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