| Abstrakt: |
This article focuses on the development of Tamazert kaolin deposit located in the eastern of Algeria. Recently chemical and mineralogical analyses of representative samples have shown that kaolin contains large amounts of impurities of iron oxide (Fe2O3) and anatase (TiO2), which adversely affect the quality of the commercial product. In order to improve the kaolin quality, literature search was performed.The aim of the present study was to reduce iron oxide impurities and titanium oxide contained in kaolin. Different particle size fractions of the crude sample were analyzed by XRD. Kaolin, like all clays, has a thin spread of minerals. To supplement the mineralogical characterization of the kaolin sample Tamazert < having a particle size 45 mm, the electron microscope was used (SEM) SEM type 7001F. The point indicating the presence of kaolin was examined by EDX (Energy Dispersive X-ray), with an electron beam with energy of about 10 keV for 37 seconds. The particle size fraction of less than 45µm corresponding to the liberation mesh was chosen for purification by leaching with different concentrations of hydrochloric acid, heated to a temperature of 85 ° C. From crude sample, different size fractions of particles were analyzed by XRD. According to the obtained results, it was established that the mineralogical composition comprises: quartz, muscovite, kaolinite, dolomite, albite and orthoclase. Samples of kaolin, treated with HCl, were analyzed by the X-ray fluorescence and by XRD. The results confirm that the iron oxide content (Fe2O3) is reduced from 1.65% to 0.85% with a brightness up to 90% as a result of leaching concentration of hydrochloric acid. [ABSTRACT FROM AUTHOR] |
