Several methods have been reported for the dissolution of microcline over the past 100 years Rao et al 1998 including CaCO 3 sintering process Guillet 1994 phosphogypsum sintering process
This review summarizes the main methods the hydrothermal high temperature pyrolysis microbial decomposition and low temperature methods for potassium extraction from K feldspar
Effects of ratios of feldspar to CaCl2 to NaCl roasting temperature roasting time and particle size on the melting out rate of potassium from feldspar was studied by roasting Results showed that the highest melting out rate of potassium reached at % under the ratio of of feldspar to CaCl2 to NaCl particle size 220mesh roasting temperature 800°C
Potassium ion released from the silicate matrix combines with chloride ions to form potassium chloride which solubilized in water during the leaching process of the roasted feldspar For elucidation of the mechanism of the roasting process the shrinking core model was applied to the roast leach data and diffusion through the product layer
China is the second largest producer of feldspar and the largest feldspar consumer in the world Tanner 2012 Unfortunately most of feldspar resources in China reportedly are characterized with fine liberation size consisting quartz mica and iron minerals Hu et al 2005 Zhou et al 2013 Owing to the lack of advanced processing and mechanism to
The chloridizing roast leach route was applied and found to be a feasible process for extraction of potassium from nepheline syenite The extraction of potassium from feldspar by molten salt leaching method with composite additives Adv Mater Res 524 527 2012 pp 1136 1139 View in Scopus Google Scholar
4 The gold extraction method mainly depends on the chemical composition of the gold ore the mineral composition the gold particle size of the gold and the requirements of the finished product Gravity separation flotation magnetic separation cyanidation these different extraction methods can maximize gold recovery
The extraction of potassium from K feldspar via a calcium chloride calcination route was studied with a focus on the effects of the calcination atmosphere calcination temperature and time mass ratio of CaCl 2 to K feldspar ore and particle size of the K feldspar ore The results demonstrated that a competing high temperature hydrolysis reaction of
Key words K feldspar Calcium chloride Potassium extraction Calcination ： The extraction of potassiumfrom K feldspar via a calcium chloride calcination route was studied with a focus on the effects of the calcination atmosphere calcination temperature and time mass ratio of CaCl 2 to K feldspar ore and particle size of the K feldspar ore
The existing methods of potassium extraction from K feldspar involve the using hydrofluoric acid digestion Ma et al 2016 Ma et al 2016a hydrothermal processing C J Ma and Gao 2019;Liu
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
Abstract Potassium feldspar K feldspar was decomposed with limestone and dolomite as additives to prepare alkaline mineral silicon calcium potassium magnesium fertilizer abbreviated as Si Ca K Mg fertilizer via high temperature calcination route The effects of calcination temperature on the mineral composition extraction ratios of available effective
Article The extraction of potassium from K feldspar ore by low temperature molten salt method☆ Zhao Wang1 2 3 Quanyou Zhang1 2 ⁎ YingYao1 2 Yongzhong Jia1 2 Bingjun Xie4 1 Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining 810008 China 2 Qinghai
A process has been reported on the extraction of potassium from feldspar mineral using a mixture of magnesium sulfate and calcium carbonate as the molten media [12] It has been reported that calcium chloride hexa hydrate can be used as the additive to treat K feldspar forming calcium carbonate and soluble potassium as the products [13]
CaCl 2potassium feldspar ratio Serdengeçti et al [15] investigated the production of KCl from a potassium feldspar ore containing % K 2 O and succeeded in dissolving % of potassium
A low temperature molten salt hydrothermal method was investigated by Wang et al for the extraction of potassium from K feldspar Wang 2018 In that study the mixture of a low melting point sodium nitrate salt T mp = 300 °C and alkaline solution NaOH have been proposed to activate the K feldspar structure in an autoclave reactor
A process has been reported on the extraction of potassium from feldspar mineral using a mixture of magnesium sulfate and calcium carbonate as the molten media [12] It has been reported that calcium chloride hexa hydrate can be used as the additive to treat K feldspar forming calcium carbonate and soluble potassium as the products [13] The
extraction of potassium from liquor generated from water leaching of roasted feldspar has been carried out Effect of process parameters on extraction was thoroughly studied and optimum conditions for extraction were determined 2 Experimental Materials Run of mine K feldspar was obtained from a local mine of Rajasthan
The effectiveness of the extraction process is mostly dependent on the size of the particle used The finer the particle size the better is the yield Larsen E Kleiv RA 2016 Flotation of quartz from quartz feldspar mixtures by the HF method Miner Eng 98 49 51 Google Scholar Xu L Jiao F Jia W Pan Z Hu C Qin W 2020 Colloids
As so far many processes have been developed to extract soluble potassium from K feldspar mainly including high temperature roasting process hydrothermal process microbial decomposition
A process has been reported on the extraction of potassium from feldspar mineral using a mixture of magnesium sulfate and calcium carbonate as the molten media [12] It has been reported that calcium chloride hexa hydrate can be used as the additive to treat K feldspar forming calcium carbonate and soluble potassium as the products [13] The
Studies on Extraction of Potassium from Feldspar by Roast leach Method Using Phosphogypsum and Sodium Chloride Mineral Processing and Extractive Metallurgy Review 2016 37 5 323 332
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