Study on Dissolution Behavior of High Titanium Bauxite

Abstract

Dissolution behavior of high titanium bauxite was investigated. The effect of several factors on dissolution of alumina and titanium dioxide were examined. The experimental results showed that the titanium dioxide dissolution rate was 9.82% and alumina relative dissolution rate was 88.83% under the best dissolution conditions for dissolution temperature of 240°C, lime add volume of 4%, and alkali concentration of 220g/L.

Determination of Titanium Dioxide Content in Bauxites Using X-ray Fluorescence Spectrometry by Fusion and by Pressing

“…These results served as a starting point for the t-test, where the hypothesis on the equality of the reference value and the average value of the results was tested. (5) Critical value at α = 0.05, v = 9 is t = 2.262. Since |t| < |t| critical , with the risk of 5%, the zero hypothesis can be accepted, and one can conclude, that the XRF method does not have a systematic error.…”

“…TiO 2 exists in the form such as anatase, rutile and brookite minerals. 5 Various methods have been used for determining titanium content in different types of samples, such as: inductively coupled plasma-atomic emission spectrometry (ICP-AES), 6 inductively coupled plasma-mass spectrometry (ICP-MS), 7 graphite furnace atomic absorption spec-trometry (GFAAS), 8 catalytic adsorptive stripping voltammetry (CASV), 9 neutron activation analysis (NAA), 10 spectrophotometry, 11,12,13 X-ray fluorescence (XRF), 14 and laser induced breakdown spectroscopy (LIBS). 15 Chemical composition of bauxite is usually expressed in the content of Al 2 O 3 , SiO 2 , Fe 2 O 3 , TiO 2 , and CaO, with the loss on ignition at 1075 °C.…”