Extraction of Zirconium From Iraqi Bauxite Ore

Abstract

This research is devoted to the study of the extraction of zirconium from Iraqi Bauxite Ore by using hydrometallurgical method. The chemical analysis was done to the bauxite ore by using X-ray florescence, X-ray diffraction and atomic absorption spectroscopy. Zirconium Extraction was performed via three stages; the first stage is leaching of bauxite with sodium hydroxide for alumina leaching. The second stage is leaching of zirconium species from the remained powder produced from stage one after washing with deionized water and, nitric acid (HNO3 solutions). The results of the first stage has reflected the recovery of 42.27 % of Al2O3 which has been leached 100°C temperature, 7.5 molar of NaOH, liquid to solid ratio of 20/1, and stirring rate 450 rpm. The highest leaching percent of zirconium (Zr%) from the red mud approached 98.48 % at 100°C temperature, 7 molar acid concentration, 120 min. contact time, solid to liquid ratio (S/L) of 16/1, and stirring rate of 450 rpm. 99.47% recovery of zirconium was accomplished from nitric acid solutions by use of 3molar tri-n-butylephosphate (TBP)in kerosene at ,contact time for 6 min, and organic to aqueous phase (O/A) of 4/1.

Kinetic Study for Janus Green Dye Adsorption from Aqueous Solutions Using Iraqi Bauxite Clay and its Composite

“…Figure ( 2 -BAU) XRD pattern of bauxite before modified Where we notice that most of the characteristic peaks of the first surface (BAU) belong to the minerals bohemite and kaolinite, and to a lesser extent both gibbsite and calcite , We also notice a great agreement in terms of the positions of the characteristic peaks of the above figure with the X-ray diffraction spectrum of bauxite clay in the study [11],Which indicates that it is this bauxite clay on the one hand, and on the other hand, we notice the sharpness and intensity of the distinctive peaks, which indicates that it is of a crystalline nature. .…”

Optimization alkaline leaching of silicon element from bauxite ore

“…Figure 1 exhibits the influence of particle size, NaOH concentration, and stirring speed on the recovery of Si from bauxite for values between (+1, -1). It can be seen that there is a gradual increase in the recovery with the increase in NaOH concentration, which is due to the excellent attack of sodium hydroxide on bauxite ore, resulting in the decomposition and disintegration of elements [1]. From Figure 1, it can be seen that the recovery increases as the particle size is decreasing, and the highest percentage of (L %) obtained is at 53 μm.…”

“…Red mud or bauxite refinery residue (BRR) is a highly hazardous residue produced during the extraction of alumina from bauxite. The global production of red mud is estimated to be over 150 million tons per year A.Muhanad [1]. Despite the existence of recycling methods, bauxite residue is discarded as waste.…”

“…Shredding processes, wet and dry screening, magnetic separation, gravity separation approaches, electrostatic separation float, and other physical techniques that make use of variations in the chemical and physical surface qualities of the metal and its impurities may be adequate choices. The effectiveness of such operations is determined in large part by the selection of acceptable working conditions for each approach [1] as well as the metal ratio in the raw materials and the technique or procedures used for separating and concentrating them. The aim of this study is to use a hydrometallurgical process for recovering silicon from Iraqi bauxite ore.…”

A New Partially Phosphorylated Polyvinyl Phosphate-PPVP Composite: Synthesis and Its Potentiality for Zr (IV) Extraction from an Acidic Medium

“…Alkali fusion, water leaching, acid leaching, drying and crystallization are all steps to hydrate zirconium oxychloride [23]. To produce zirconium compounds, the alkali fusion process has become an essential step [24].…”