Laboratory and Pilot Scale Studies of Potassium Extraction from K-feldspar Decomposition with CaCl2 and CaCO3
Laboratory and Pilot Scale Studies of Potassium Extraction from K-feldspar Decomposition with CaCl2 and CaCO3
复制标题
CaCl2 和 CaCO3 钾长石分解提钾的实验室和中试研究
DOI：
10.1252/jcej.15we078
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发表时间：
2016-02
影响因子：
0.8
通讯作者：
Li Zhibao
中科院分区：
文献类型：
--
作者：
Zhang Yan;Asselin Edouard;Li Zhibao
从丰富的钾长石中提取钾的工艺最近引起了人们的兴趣，以确保发展中国家的钾肥自给自足。同时，氨-碱法（Solvay法）中产生的蒸馏废液和碱渣也造成了严重的污染。提出了以酒糟渣和碱渣为添加剂从钾长石中提取钾的方法。研究了k -长石焙烧温度、k -长石粒度和添加剂用量对k -长石- cacl2 - caco3体系提钾的影响。采用基于扩散的ginstling - bronshtein方程，模拟了k -长石质量比（106 ~ 160 μ m）： CaCl2: CaCO3 = 1:2:2的体系在750 ~ 850℃下的反应动力学。表观活化能约为111 kJ.mol（-1）。在XRD和SEM-EDS分析的基础上，提出了CaCl2熔点（772℃）以下和以上两种不同的反应机理。在850℃的焙烧温度下进行了中试，钾的回收率约为82%。在实验室中获得的令人鼓舞的结果在中试规模上得到了重复。
Processes for potassium extraction from abundant K-feldspar have recently attracted interest to ensure potash self-sufficiency for developing countries. Concurrently, distiller waste and soda residue formed in the ammonia-soda process (Solvay method) have resulted in serious pollution. A method of potassium extraction from K-feldspar with distiller waste and soda residue as additives is proposed. The effects of roasting temperature, particle size of K-feldspar and the amount of additive on potassium extraction for the K-feldspar-CaCl2-CaCO3 system were studied. The reaction kinetics of the system with mass ratios of K-feldspar (106-160 mu m) : CaCl2 : CaCO3 = 1 : 2 : 2 at 750-850 degrees C were modeled by the diffusion-based Ginstling-Brounshtein equation. The apparent activation energy was approximately 111 kJ.mol(-1). On the basis of the XRD and SEM-EDS analysis, two different reaction mechanisms were proposed below and above the melting point of CaCl2 (772 degrees C). A pilot test was carried out at a roasting temperature of 850 degrees C and the recovery of potassium was approximately 82%. The encouraging results obtained in the laboratory were replicated at the pilot scale.
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影响因子：
0.8
作者：
H. Nakagawa;Akio Namba;A. Sharma;K. Miura
通讯作者：
H. Nakagawa;Akio Namba;A. Sharma;K. Miura
影响因子：
1.4
作者：
Scheidl, K. S.;Schaeffer, A. -K.;Abart, R.
通讯作者：
Abart, R.
影响因子：
3.4
作者：
Supratim Biswas;S. Chakraborty;M. Chaudhuri;P. C. Banerjee;S. Mukherjee;Rajib Dey
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Supratim Biswas;S. Chakraborty;M. Chaudhuri;P. C. Banerjee;S. Mukherjee;Rajib Dey
影响因子：
5
作者：
Yi Yang;Y. Min;J. Lococo;Young-Shin Jun
通讯作者：
Yi Yang;Y. Min;J. Lococo;Young-Shin Jun
影响因子：
6.1
作者：
T. Iwachido
通讯作者：
T. Iwachido