Abstract
Potassium and phosphate were extracted at low temperature by acid hydrolysis process to decompose a new type of associated phosphorus and potassium ore. The main factors affecting the dissolution rate were investigated, such as grinding fineness, the amount of sulfuric acid and fluoride salt, reaction time and temperature, etc. Meanwhile, the effects of various factors on the formation of soluble potassium and phosphate were also discussed. The reaction products and residues were determined by X-ray diffraction (XRD), scanning electron microscopic (SEM) analysis and other means. The results showed that the dissolution rates of potassium and phosphorus were 70wt% and 93.7wt%, respectively, under the conditions of a grain size of 95.64wt% lessthan 0.074 mm, 9.78 g•g-1 sulfuric acid, 0.5 g•g-1 ammonium fluoride, 160 °C and a reaction time of 2 h. The thermodynamic and chemical reaction mechanism was revealed that the primary reaction could be completed spontaneously in a temperature range of 298-433 K. The increase of reaction temperature had an important influence on ion exchange reaction, which was more conducive to the spontaneous process. The research will open up a new way for efficient use of potassium ore resources.
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Hu B, Han XZ, Xiao ZH, et al. The Metallogenic Regularity and It is Guiding for Prospecting of Miaogou Boron Deposit in Daxicha Village Kuandianliaoning[J]. Geology of Chemical Minerals, 2005, 27(1): 25–32
Ma HW, Su SQ, Liu H, et al. Potassium Resource and Sustainable Development of Potash Salt Industry in China[J]. Earth Science Frontiers, 2010,17(1): 294–310
Shang PQ, Xiong XX, Li BY. Discussion on the Main Potashconcentrated Districts and the Resource Potential in China[J]. Geology of Chemical Minerals, 2011, 33(1): 1–8
Liu YW, Qin YH, Wang CW, et al. Study on Process Mineralogy for Phosphate Potassium Ore in Zhongjianping, Yichang[J]. Multipurpose Utilization of Mineral Resources, 2014, 02: 69–71
Liu JX. Analysis of Domestic Phosphate Rock Resources, Their Exploitation and Utilization[J]. Chemical Fertilizer Industry, 2009, 06: 27–31
Hu B, Han XZ, Xiao ZH. Distribution of Potash Feldspar Resources in China and Its Exploitation[J]. Geology of Chemical Minerals, 2005, 3(27): 26–32
Han XZ, Hu B, etc. Research on the Extract ion Potassium from Potash Feldspar in the Acid Environment[J]. Industrial Minerals and Processing, 2005, 9:1–3
Han XZ, Yan Y, Hu B. Research on the Reaction Mechanism of Potash Feldspar and Phosphate Rock in the Phosphoric Acid[J]. Phosphate and Compound Fertilizer, 2007,22 (5): 19–22
Han XZ, Yao WT, Hu B, Deng ZT. Extraction of Potassium from Potash Feldspar by Ion-exchange[J]. Chinese Journal of Applied Chemistry, 2003, 20(4): 373–375
Hu TX, Yu JG. Experimental Study on Decomposition of K-feldspar with CaCl2 and NaCl for Extraction of Potassium[J]. The Chinese Journal of Process Engineering, 2010,10(4): 701–705
Chen DS, Shi L, Wang BR. Experimental Study of Calcination of Potash Feldspar for Manufacture of Potassium Sulfate[J]. Chemical Fertilizer Industry, 2006, 33(6): 20–23
Wang ZB, Cheng CZ, Wang GZ, et al. Study on Extracting Potassium from Potassium Feldspar-NaOH System by Hydrothermal Method[J]. Industrial Minerals and Processing, 2010, 5: 6–7
Wang YG. Study on the Comprehensive Utilization for Illite[J]. Chemical World, 2001,12: 624–626
Ding Y. A New Technique of Preparing Potash Fertilizer by Decomposing Potassium Feldspar at Constant Pressure and Low Temperature[J]. Hunan Chemical Industry, 1996, 26 (4): 3–4
Guo DY, Han XZ, Wang ZB, et al. Study on the Reactive System of Consisting of Potash Feldspar-phosphate Rock-hydrochloric Acid[J]. Phosphate and Compound Fertilize, 2009, 24(6): 14–16
Ran RS, Zhao XM. Characteristic of New Industry Ledge(Ph12) in Yichang Phosphorite Mine, Hubei and Its Geological Significance[J]. Contributions to Geology and Mineral Resources Research, 2008, 23(4): 320–324
Wang SL, Huang ZL, Luo X, et al. Process Mineralogy Studies of Phosphate Ores in Yichang[J]. Wuhan Inst. Tech., 2012, 34(2): 55–59
Wei HD, Yu QX. Determination of Available P2O5 in DAP[J]. Journal of the Chemical Fertilizer Industry, 2003, 30(2): 44–46
Huang K, Wang GL, et al. Mechanism of Low Temperature Potassium Extraction Process from Potassium Feldspar[J]. Chemical Engineering(China), 2012, 05: 57–60
Zhang YY, Han XZ, et al. Study on Reaction Progress of Potash Feldspar and Calcium Chloride in Phosphoric Acid System[J]. Anhui Chemical Industry, 2009, 08: 26–29
Guo DY, Han XZ, Wang ZB, et al. Study on the Reactive System of Consisting of Potash Feldspar-phosphate Rock-hydrochloric Acid[J]. Phosphate and Compound Fertilizer, 2009, 11:14–16
Casey WH, Westrich HR, Arnold GW, et al. The Surface Chemistry of Dissolving Labradorite Feldspar[J]. Geochimistry CosmochimistryActa. 1989, 53: 821–832
Casey WH, Westrich HR, Arnold GW. Surface chemistry of Labradorite Feldspar Reacted with Aqueous Solutions at pH=2,3 and 12[J]. Geochimistry Cosmochimistry Acta, 1988, 52: 2795–2807
Lan FQ, Kuang G. The Study on Extracting Potassium Process of Potash Feldspar-Fluorite-Sulphuric Acid-Fluosilicic Acid System[J]. Chemical Production and Technology, 2011, 01:19–21
Mysen B.O, Virgo D. Volatiles in Silieate Melts at High Press-ure and Temperature Interaction between OH- groups and Si4+, Al3+, Ca2+, Na+ and H+[J]. Chemincal Geology, 1986, 57: 303–331
Xue YH, Pan ZK. The Thermodynamics Studies of Decomposition Potash Feldspar in Low Temperature[J]. Geology of Chemical Minerals, 2006, 03: 167–170
Hu TX, Yu JG. Experimental Study on Decomposition of K-feldspar with CaCl2 and NaCl for Extraction of Potassium[J]. The Chinese Journal of Process Engineering, 2010, 04: 701–705
Ma HW, Wang YB. Chemical Equilibrium in Silicate Systems: (2) Reaction Thermodynamics[J]. Geoscience, 2006, 03: 386–398
Han XZ, Yao WT, Hu B. Study on the Potassium Extraction Through the Reaction between the Phosphorite, Phosphoric Acid and Potassium Feldspar by Enclosed Constant Temperature Technique[J]. China’s mining industry, 2003, 12(5): 56–58
Fu XC. Physical Chemistry[M]. Beijing: Higher Education Press, 1998: 45–67
John A. Dean. Lange’s Handbook of Chemistry, Fifteenth edition[M]. Seience Press and Mc Graw-Hill Edueation, 1998: l–1578
Du DW, Hong HJ, Fan K, et al. Study on the fine structure of K-Feldspar of Qichun granite[J]. Spectroscopy and Spectral Analysis, 2013, 3(33): 613–617
Tian J. Crystal Chemistry of Silicate[M]. Wuhan: Wuhan University Press, 2009:205–206
SPIERIN GS G A C M. Wet Chemical Etching of Silicate Glasses in Hydrofluoric Acid Based Solutions[J]. J. Mater. Sci., 1993, 28: 6261–6273
KNOTTER DM. Etching Mechanism of Vitreous Silicon Dioxide in HF-Based Solutions[J]. J. Am. Chem.Soc., 2000, 122:4345–4351
MONK DJ, SOANE DS. A Review of the Chemical Reaction Mechanism and Kinetics for Hydrofluoric Acid Etching of Silicon Dioxide for Surface Micromachining Applications[J]. Thin Solid Films, 1993, 232: 1–12
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Funded by the National Natural Science Fundation of China (51274158), the National Twelfth Five-Year Plan for Scientific and Technological Support(2013BAE04B03), and the Scientific and Technological Support Project of Hubei Province(2015BCA251)
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Li, L., Lei, S., Liu, Y. et al. Extraction and reaction mechanism of potassium from associated phosphorus and potassium ore. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 31, 1255–1260 (2016). https://doi.org/10.1007/s11595-016-1522-5
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DOI: https://doi.org/10.1007/s11595-016-1522-5