Extraction of potassium from K-feldspar via the CaCl2 calcination .As so far, several processes have been developed to extract soluble potassium from K-feldspar, mainly including the following methods: high temperature.feldspar extraction process method,Iron removal on feldspar by using Averrhoa bilimbii . - AIP PublishingThere have been several reported methods including flotation method 3,4, . Averrhoa bilimbii extract as organic acid substitute for leaching was selected in.Feldspar Beneficiation & Flotation Process - 911 MetallurgistFor all the grades of feldspar, requirements are that the iron . and flotation is fast developing into the principal method used.
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