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The roasting process between feldspar and calcium chloride prepared from ESP and HCl is a fluid–solid reaction. At the eutectic point of the …
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11.27 Feldspar Processing 11.27.1 General1 Feldspar consists essentially of aluminum silicates combined with varying percentages of potassium, sodium, and calcium, and it is the most abundant mineral of the igneous rocks. The two types of feldspar are soda feldspar (7 percent or higher Na O) and potash feldspar (8 percent or higher K O).
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The feldspar concentrate recovered 19.1 pct of the feed weight and was analyzed, in percent, as 12.0 K2O, 0.65 Na2O, 0.13 CaO, 19.2 Al2O3, 63.3 SiO2, and 0.70 Fe2O3. The quartz concentrate recovered 47.7 pct of the feed weight and was analyzed as 99.7 pct SiO2 and 0.04 pct Fe2O3.
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CHEN T P, HAN X Z, ZHENG Y X, LI W, FANG D M, ZHENG B C. Study on ball milling reaction process based on potash feldspar-phosphate rocks-hydrochloric acid system [J]. Chemical Minerals and Processing, 2013, 1: 1âˆ'4. (in Chinese) [17] JI H P, XU J M. Reseach progress of potassium extraction from potash feldspar [J].
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Potassium feldspar (K-feldspar), as a type of insoluble potassium resource, is abun-dant in China, with reserves of over 10 billion tons [10]. K-feldspar is characterized by a higher potassium content, a wide distribution, and the large reserves [11]. However, compared to the recovery and processing of potash from soluble mineral raw resources,
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An optimized process of the hydrothermal treatment of potassium feldspar (K-feldspar) and lime to obtain a potash alternative is reported. The optimization did not …
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feldspar, any of a group of aluminosilicate minerals that contain calcium, sodium, or potassium.Feldspars make up more than half of Earth's crust, and professional literature about them constitutes a large percentage of the literature of mineralogy.. Of the more than 3,000 known mineral species, less than 0.1 percent make up the bulk of …
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Glass–ceramics were synthesized using ground blast-furnace slag and potash feldspar additives by a conventional ceramic-sintering route. The results show 5 wt% potash feldspar can enhance the sintering properties of blast-furnace slag glass and the results glass–ceramics have desirable mechanical properties.The main crystalline …
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@article{Wenjie2016AnEM, title={An efficient milling-assisted technology for K-feldspar processing, industrial waste treatment and CO2 mineralization}, author={Shangguan Wenjie and Jimin Song and Hairong Yue and Siyang Tang and Changjun Liu and Chun Li and Bin Liang and Heping Xie}, journal={Chemical …
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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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The separation of feldspars from quartz is a challenging processing method as they have identical physical and physicochemical surface properties. To put forward the possible ways to separate them from each other is essential. ... Decomposition behavior of CaSO 4 during potassium extraction from a potash feldspar-CaSO 4 binary system by ...
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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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Abstract: A novel process was proposed for the utilization of potash feldspar by roasting in the presence of sodium carbonate. The effects of roasting temperature, granularity, molar ratio of sodium carbonate to potash feldspar and roasting time on the silica extraction rate were investigated. Under the optimal roasting conditions, the silica ...
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Potash feldspar is a kind of inexpensive and widely distributed aluminosilicate mineral, and it has a Mohr hardness of 6, a density of 2.56 to 2.59 g/cm 3 and a melting temperature of 1290 °C in ...
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In this paper, the molecular sieves with high added value were creatively prepared from roasting clinker obtained by the process that NaOH-Na2CO3 mixed alkali as auxiliary agent calcined potash feldspar, which could extract the silicon it contains. Firstly, the optimum roasting conditions for SiO2 extraction rate were determined through single …
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Section 2 gives a description of the feldspar industry, an overview of the different process technology used to control emissions resulting from data collection and laboratory …
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164.99 kJ/mol, and the process could be expressed as [1 í (1 í . ) ... optimum procedure for potash feldspar roasting with sodium carbonate. The results and analysis of the
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In this paper, a potash feldspar ore beneficiation tailings which contained niobium 0.24% and the RE x O y 0.78% in Shaanxi Lueyang Anlingou area was obtained, and a hydrometallurgical process "sulfuric acid decomposition-leaching-HF deposited-extraction-stripping-calcining" for the REs and Nb recovery from potash feldspar …
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The technology of transforming potassium minerals from potassium feldspar into soluble potassium by acid hydrolysis, and discussed the leaching mechanism of potassium in the process of leaching. The results showed that the dissolution efficiency of potassium was 76 % under the conditions of 8.05 g·g −1 70 wt% H 2 SO 4, 0.5 g·g −1 ...
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The order of the roasting process was found to be 2.158 and activation energy calculated to be 155.3 kJ/mol. Apart from potassium, sodium and excess calcium also got co-leached. ... Particles of ...
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The potash feldspar and soda feldspar are about 50~60%. The gangue minerals include quartz, mica, and iron minerals. This kind of feldspar usually transfer into feldspar concentrates through flotation process. ... Granite feldspar processing method. Granite feldspar is a coarse-grained acid plutonic igneous rock. Its Mosaic grain size is ...
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18 rowsFeldspar includes potash feldspar and plagioclase, and the potash feldspar and plagioclase contents range from 0 to 14.61% and 0–8%, respectively. The …
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The roasting process between feldspar and calcium chloride prepared from ESP and HCl is a fluid− solid reaction. At the eutectic point of the temperature, calcium chloride melts and acts as the fluid and feldspar as the solid. Particles of potash feldspar were assumed to be spherical in shape, and shrinking core model equations are utilized ...
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The invention relates to a potash feldspar iron removal process, which comprises the following steps: coarse grain washing, grinding, removing mica by flotation, magnetic separation for removing iron, filtering and drying. The process has the advantages of more thorough iron removal and higher quality of the produced feldspar concentrates.
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This paper describes an environmentally friendly and efficient milling-assisted technology to produce soluble potassium from natural K-feldspar with the additive of calcium salts, and capture CO 2 via mineralization. The milling-assisted process could facilitate the extraction of potassium from K-feldspar under mild conditions (e.g. 30–40 …
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The process not only champions efficiency but also underscores the principle of sustainable and green methodologies in potash production. 3.3. Transformation mechanism of water-soluble potassium ... Kinetics of roasting potash feldspar in presence of sodium carbonate. J. Cent. South Univ., 24 (2017), pp. 1544-1550, 10.1007/s11771 …
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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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from potash feldspar: magnetic separation process, acid leaching process and flotation process [8, 9]. The separation of iron from potash feldspar can be achieved by taking advantage of external magnetic field since some iron minerals in the potash feldspar possess magnetism [10]. A new high intensity wet permanent magnetic separator was …
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At the optimized parameter values, the DVHGMS could purify the potash feldspar from the Fe2O3 grade of 0.191% in feed to 0.035% in non-magnetic product, while the mass weight of feldspar was 92.35%.
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