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The experimental replacement of ilmenite by rutile in HCl solutions - Volume 74 Issue 4
The reaction of hydrochloric acid with ilmenite showed that HCl (10 wt%) dissolved 75 wt% of the iron from ilmenite particles after 10 hrs of reaction at 300°F. SEM and XRD results showed that ...
A hydrometallurgical process is provided for producing pigment-grade TiO2 from an ilmenite ore concentrate containing by weight a relatively high magnesium content ranging up to about 10 %, an iron content of at least about 15 % and a titanium dioxide content of at least about 25 %. The concentrate is selectively leached with hydrochloric acid at a concentration ranging up to about 30 % of ...
Jan 10, 2015· The maximum leaching efficiency of 92% was noted for ilmenite leaching with 30% hydrochloric acid under 70 °C and 700 rpm (rate constant 5.18 × 10 − 3 min − 1) 5. The enthalpy of the reaction (ΔH) was calculated as 24.157 kJ/mol and entropy of the reaction …
Hello guys Today video is about the reaction of concentrated hydrochloric acid with Kurkure and cake.
can be particularly well applied to the removal of chromite, and at the same time give a high ilmenite recovery and is therefore well adapted for the handling of Murray Basin high-chromite ore types. 2.3 Hydrochloric Acid Leaching ERMS-roasted ilmenite is highly reactive to hydrochloric acid leaching. The leach reactions may be
7.1b observing a colour change (in the reaction between sodium thiosulfate and hydrochloric acid) Apparatus and Techniques 5 Making and recording of appropriate observations during chemical reactions including changes in temperature and the measurement of rates of reaction by a variety of methods such as production of gas and colour change
The sulfate process for the manufacture of titanium dioxide pigment involves feedstock prepared by digesting ilmenite ore with sulfuric acid following the reaction : FeTiO 3 + 2H 2 SO4 = TiOSO 4 + FeSO 4 + 2H 2 O.TiOSO 4 TiO 2. nH 2 O + H 2 SO 4 = TiO 2 nH 2 O TiO 2 + nH 2 O.
Aug 15, 2019· OSTI.GOV Journal Article: Influence of Temperature on Reaction Mechanism of Ilmenite Ore Smelting for Titanium Production
The effects of acid concentration, reaction temperature and particle size on the ore dissolution rate were examined. Experimental results showed that the ore dissolution increases with increasing acid concentration and temperature and decreases with increasing particle size fraction. ... columbite-rich ilmenite ore, leaching, sulphuric acid ...
Aug 01, 2016· Ilmenite (FeTiO 3) is an important source of titanium, for which the main application is TiO 2 pigment. One route to the production of TiO 2 from ilmenite may be the digestion of both the Fe and Ti components in hydrochloric acid and the subsequent direct hydrolysis of the Ti. The process requires that the Ti be solubilized. A kinetic study is performed of the leaching of New Zealand ...
Hydrochloric Acid H-Cl reacts in the same way, although often Zinc (II) chloride (a Lewis acid) is added to help compensate for the lower nucleophilicity of chloride ion. The mixture of HCl and ZnCl 2 is called the Lucas Reagent. Secondary and tertiary alcohols react via the S N 1 mechanism with the Lucas reagent. The ZnCl 2
A process for producing titanium dioxide of a pigment grade from ilmenite in which ilmenite is optionally leashed with dilute hydrochloric acid to effect at least a substantial removal of the phosphorus content therefrom reacting the resulting ilmenite when in a particulate form with an excess of hydrochloric acid at an acid concentration greater than 25% w/w to generate titanium ions in ...
The kinetics of the sulfuric acid leaching of altered ilmenite, mechanisms, and process intensification methods were studied. The effect of changing the chemical composition during grinding was determined. The content of ilmenite and pseudorutile decreased from 5.3% to 3.1% and from 90.2% to 63.1%, respectively. Rutile increased from 4.5% to 28.7%, while a pseudobrookite new phase appeared in ...
Feb 17, 2021· Ilmenite(FeTiO 3) ore is a raw material for producing TiCl 4 through the chlorination method and the sulfuric acid reaction method. TiCl 4 is used as a …
of reaction was found fit to the diffusion reaction model. The activation energy was calculated 17.607 KJ/mol. Key Words: Ilmenite, Abu-Ghalaga, Leaching, Hydrochloric acid, about 300 m, and an average width of about 150 m Synthetic rutile. 1. INTRODUCTION The mineral ilmenite (nominally FeTiO 3) is huge resource of rutile (TiO 2
Through the heat treatment, ilmenite (FeTiO3) is oxidized to hematite (Fe2O3) and rutile (TiO2) via a solid-state reaction mechanism. The leaching experiments revealed that after the pre-heating step the iron dissolution in the leaching process is limited due to the lower solubility of ferric iron in the hydrochloric acid.
Jun 05, 2013· The reaction of hydrochloric acid with ilmenite showed that HCl (10 wt%) dissolved 75 wt% of the iron from ilmenite particles after 10 hrs of reaction at 300°F. SEM and XRD results showed that the reaction product was mainly rutile (TiO 2) after 6 hrs of reaction.
A mechanism for ilmenite leaching in hydrochloric acid will now be proposed that will clarify under what conditions each of these rate-determining steps operate.Initially, as predicted by the chemical reaction equation, when ilmenite comes into contact with the hydrochloric acid leach solution, both iron and titanium go into solution.
hydrometallurgical treatment of ilmenite to produce synthetic rutile using hydrochloric acid [10–12]. In Iran, at least 90 wt. % of titanium resources is located in Kahnooj. The high impurity content makes them unsuitable for the chlorination process and can only be processed by the sulfate process, which is …
The production of titanium carbide (TiC) powders from ilmenite ore (FeTiO 3) powder by means of carbothermal reduction synthesis coupled with hydrochloric acid (HCl) leaching process was investigated. A mixture of FeT iO 3 and carbon powders was reacted at 1500oC for 1 hr under flowing argon gas. Subsequently, synthesized product of Fe-TiC powders
3.1. Digestion using Hydrochloric Acid The chosen ilmenite concentrate sample was first subjected to digestion using hydrochloric acid. For this purpose many digestion factors included acid concentration, ilmenite/acid ratio, ore grain size, reaction time and reaction temperature were studied and optimized. The expected chemical reactions
The results indicate that a hydrochloric acid concentration of 25 wt% supplied in a 2:1 acid-to-iron mole ratio would produce the most favourable upgraded nitrided ilmenite product. The dissolution of iron in this solution reached 97 per cent after only 60 minutes.
required reaction period, the slurry was filtered off. After washing the solid tita-nium with 2% HCl, the filtrated sample was dried in the air at 100˚C. The UV-Vis spectroscopy method was used to determine the Fe content of the ... Ilmenite, Oxalic Acid, Hydrochloric Acid, Synthetic Rutile, Leaching ...
Aug 06, 2021· A kinetic study of ilmenite in hydrochloric acid (HCl) leaching in the presence of reducing agent has been investigated. The effect of temperature ranging from 60 oC to 80 oC and HCl ...
Sep 06, 2012· Kinetics of leaching of oxidized and reduced ilmenite in dilute hydrochloric acid solutions. Int J Miner Process. 2006;80:223–8. Article CAS Google Scholar 11. Grey IE, Reid AF. Reaction sequences in the reduction of ilmenite: 3-reduction in a …
Sep 14, 2015· Results showed that ilmenite oil-based filter cake can be successfully removed at 300°F after soaking with 5 wt% hydrochloric acid for 4 hours, even without causing much damage to the core permeability. The filter press test showed that the retained permeability of …
The hydrolyzed titania residue prepared from mechanically activated Panzhihua ilmenite leached by hydrochloric acid was decomposed by concentrated sulfuric acid and …