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In this study, potassium extraction from K-feldspar ore with an 8.42% K2O content was studied using chloridizing (CaCl2) roasting followed by water leaching. …
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To recover potassium from feldspar, a biowaste, i.e., eggshell, was used. The chief composition of eggshells is calcite. As it is a rich source of Ca, hence it is used with HCl to produce calcium ...
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106 microns, 850 Co, 60 minutes, 1:1.5 feldspar:CaCl2), 99% of the potassium was successfully extracted from the ore feed. Keywords: potassium extraction; feldspar; muscovite; chloridizing roasting 1. Introduction Potassium is the seventh most abundant element in the world and it has a significant function in
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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 ...
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This work focuses on extraction of potassium from feldspar through pyro-hydrometallurgical route. Calcium chloride was used as roasting agent for feldspar. Effect of various operating variables, viz. time, roasting temperature and CaCl2 dose on extent of roasting, were thoroughly studied. Roasting 10 g of feldspar with 17 g of CaCl2 at 900 …
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The extraction of potassium from K-feldspar by calcium chloride calcination is a heterogeneous reaction. Generally, the factors affecting the extraction involved mainly the calcination temperature, reaction time, mass ratio of the CaCl 2 /K-feldspar ore and particle size of the K-feldspar ore. However, a preliminary experiment …
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The results revealed that the mechanical activation of potassium feldspar could reduce the particle size and produce agglomerated nanoparticles in the later period. The addition of NaOH and sodium salt did not cause agglomeration, and NaOH dissolved the nanoparticles. ... Tülay, T.; Murat Olga, K. Extraction of KCl from Potassium …
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Roasting is the most critical step of potassium extraction from potassium feldspar. Two main parameters, that is, temperature and roasting duration, impact the success of the process. In this experiment, first, the feldspar:CaCl 2 ratio was kept constant at 1:1.5, and then, the leaching tests were performed at a 10% solid in pulp ratio, 60 °C ...
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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, …
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The optimal feldspar–CaCl 2 ratio was found to be 1:1.5, and 98.6% of the potassium was successfully extracted from the potassium feldspar ore. It is inevitable …
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KCl from potassium feldspar through the use of various types of additives. The aim was to extract potassium from feldspar using a roasting process, followed by water leaching, utilizing various types of salts, such as CaCl2, NaCl, and CaSO4. Experiments were carried out with a CaCl2 additive that gave the best performance …
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ABSTRACT The extractions of potassium value from feldspar via roasting and leaching route was studied with a focus on the effects of the roasting time, temperature, additives, and particle size. Sodium chloride and phosphogypsum (PG) were used as a source of chloride and calcium, respectively, and played the important role during the …
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Plagioclase feldspar is a group. Anorthite has an aluminum:silicon ratio of 1:1 while Albite has a ratio of 1:3. Microcline is considered orthoclase feldspar; it's similar to albite, the only difference is sodium replaced by potassium. Feldspar with an aluminium:silicon ratio of 1:1 will dissolve in hydrochloric acid. Other forms of
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A lot of routes have been developed showcase to hinder potassium extraction from k-felspar, including; hydrothermal process [12][13][14], bioleaching [15,16], roasting at elevated temperature [17 ...
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The extraction of potassium from a tablet mixture of K-feldspar ore and CaSO 4 by roasting was studied with a focus on the effects of the decomposition behavior of CaSO 4 on the potassium extraction process. The roasted slags were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray …
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When the feldspar sample was roasted at 900⁰C with sodium chloride alone, the extraction of potassium was limited to 61%. The extraction could go up to 92.5% by the addition of phosphogypsum ...
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To date, various techniques have been developed to extract potassium from K-feldspar and produce a soluble potassium fertilizer. This review summarizes the …
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In this study, potassium extraction from K-feldspar ore with an 8.42% K2O content was studied using chloridizing (CaCl2) roasting followed by water leaching. Initially, to produce wollastonite and ...
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This review summarizes the mechanisms, effect parameters and efficacy of four methods for potassium extraction from K-feldspar: the hydrothermal method, high …
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The mass ratio of CaCl2/K-feldspar ore significantly affected the extraction. At a mass ratio of 1.15 and 900 °C, the potassium extraction reached 91% in 40 min, while the extraction was reduced ...
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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. …
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The recovery from feldspar with 7.21% K2O content was obtained with the 1:1.25:1.5 ratio of Feldspar:CaSO4:NaCl at 1000 °C for 60 minutes followed by leaching. 96.08 % potassium dissolution was ...
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Potassium solubilization activity at different temperatures In the experiment performed at 100 ml scale for potassium leaching through Acinetobacter soli, out of 60 mg potassium present in the K-feldspar, 33.1 mg …
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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 ...
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It is possible to extract around 90–95% potassium from feldspar using the CaCl 2 roasting route; however, using only NaCl can extract a maximum of 45–50% of feed potassium (Fig. 12) . However, increasing the roasting temperature above 900 °C, extraction efficiency slowly decreases, and approximately 41% of potassium becomes …
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In this paper, high value-added molecular sieves were prepared by extracting valuable components from low-temperature burned potassium feldspar with KOH as additive to make full use of potassium feldspar. At first, the best roasting conditions for extracting SiO2 from potassium feldspar by KOH medium temperature roasting are …
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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 95.35% under the ratio of 1.8:1.1:0.6 of feldspar to CaCl2 to NaCl, particle size 220mesh, roasting …
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The effects of roasting temperature, particle size of K-feldspar and the amount of additive on potassium extraction for the K-feldspar–CaCl 2 –CaCO 3 system were studied. The reaction kinetics of the system with mass ratios of K-feldspar (106–160 µm) : CaCl 2 : CaCO 3 =1 : 2 : 2 at 750–850°C were modeled by the diffusion-based ...
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The development of sintering,high temperature fusion,hydrothermal system and low temperature decomposition are reviewed,as well as their different mechanisms.A new sorting principle of potassium extraction mechanism,other than the technological properties is applied to systematize all the traditional methods.The advantage and …
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The extraction of potassium from K-feldspar by calcium chloride calcination is a heterogeneous reaction. Generally, the factors affecting the extraction involved mainly the calcination temperature, reaction time, mass ratio of the CaCl 2 /K-feldspar ore and particle size of the K-feldspar ore. However, a preliminary experiment …
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