Dissolution kinetics studies of gypsum ore sourced from Postikum, Northern Nigeria, was conducted using hydrochloric acid as the leachant. The study was done with the aim of establishing possibility for the development of hydrometallurgical route for the production of highly pure gypsum. The effects of the experimental variables investigated were contact time, acid concentration, temperature ...
Sulphuric acid leaching has been used in the treatment of lateritic ores for the recovery of nickel and cobalt therefrom. However, in order to obtain good extraction from these ores, prolonged treatment using acid of high strength and also using high pressures and recycling steps have been necessary. In the improved method of the invention nickel and cobalt is solubilized from high-magnesia ...
A kinetic study of the leaching of powdered ilmenite ore by hydrochloric acid has been investigated. The effects of (a) stirring speed ranging from 100 to 500 min −1, (b) particle size ranging from 20 to 74 μm, (c) acid concentration ranging from 7.2 to 9.6 M and (d) temperature ranging from 70 to 90°C on titanium and iron dissolution are reported.
leaching of iron oxide ore in hydrochloric acid solution. The model is expressed as: T = e(8.9055/ γ) (4) where T= Solution temperature during leaching of iron oxide ore using hydrochloric acid.(0C) N= 8.9055(pH coefficient for hydrochloric acid solution during leaching of …
Arrhenius constant of the columbite dis solution in nitric acid, respectively and the order of reaction was 0.35. The present investigation was therefore aimed a t establish ing the conditions for the leaching of the same columbitemineral ore in hydrochloric acid media. 2. Experimental 2.1. Material
of the iron ore during a quantitative leaching of iron ore in hydrochloric acid solution [3]. The dissolution rate was found to depend on the hydrogen ion concentration and temperature of the reaction system. The mechanism of dissolution appears to follow …
A study of the kinetics of the dissolution of a Nigerian tantalite ore in Nitric acid has been examined. A detailed investigation on the quantitative leaching of the mineral was also carried out. The effects of some parameters such as acid concentration, contact time, temperature, particle size and the stirring rate on dissolution action have been investigated.
A kinetic study of the leaching of iron and manganese from powdered tantalite-columbite ore by Hydrochloric Acid (HCl) and Sulphuric Acid (H 2 SO 4) solutions has been carried out.The effects of (a) particle size ranging from 63 to 250 μm (b) stirring speed ranging from 180 to 540 min-1 (c) acid concentration ranging from 4.0 to 10.0 M (d) temperature ranging from 30 to 90 ° on the leaching ...
ekiti (Nigeria) gold ore deposit by hydrochloric acid leaching followed by extraction with Tributylphosphate in kerosene. Gold analysis was carried out by measuring spectrophotometrically its complex with 4-(2-pyridylazo) resorcinol. 2. Experimental …
ACIDIC LEACHING OF IRON FROM KAOJE GOETHITE ORE BY HYDROCHLORIC ACID: KINETICS MODELLING, K. I. Ayinla, et al Nigerian Journal of Technology, Vol. 39, No. 3, July 2020 802 C 0 (%) is the metals content of Fe in oxide ore sample and M (g) is the mass of the Fe oxide ore.
Nigeria. *Corresponding Author: baalafara@yahoo, [email protected] ABSTRACT Experiments on the dissolution kinetics and leaching of rutile ore by hydrochloric acid have been carried out. The influence of acid concentration, temperature, stirring speed and particle diameter on the leaching of the ore were examined.
To the best of our knowledge, there is no reported works viz a viz the quantitative leaching of a Nigerian iron ore. Therefore, this work will provide data on the quantitative leaching and the kinetics of dissolution behaviour of the iron ore in hydrochloric acid solutions.
the Federal Government of Nigeria is now addressing posi-tively the solid mineral sector, this study would no doubt, con-tribute to Nigeria's economic growth and development as reported by Baba (2008). Therefore, this research represents the in-depth study on the dissolution of a Nigerian galena ore in hydrochloric acid solution. 2.
The phosphorous laden Koton Karfe iron ore is a medium grade iron ore deposit in Nigeria that can be upgraded as a super-concentrate for use at the Aladja Steel Midrex plant. The 75 µm size sample fraction of the ore was pre-concentrated with shaking table and leached in the oven at atmospheric pressure with dilute hydrochloric acid in
This paper presents the kinetics of dissolution of a Nigerian columbite mineral ore sample in hydrochloric acid media. The effects of acid concentration, process temperature, stirring rate and particle size on the dissolution rate were examined. Experimental results showed that the columbite dissolution increases with increasing acid concentration, temperature, stirring speed and decreases ...
Quantitative leaching of a Nigerian iron ore in hydrochloric acid AA Baba, FA Adekola, AO Folashade Journal of Applied Sciences and Environmental Management 9 (3), 15-20, 2005
quantitative leaching of a Nigerian iron ore. Therefore, this work will provide data on the quantitative leaching and the kinetics of dissolution behaviour of the iron ore in hydrochloric acid solutions. This work is interesting from the industrial perspective, as it could provide optimum conditions for the commercial production of ferric
The reactivity of ilmenite ore during leaching with hydrochloric acid can be greatly enhanced by reduction in solution using metallic iron. Addition of a particular amount of iron powder after a certain time of reaction will reduce all the dissolved Fe 3+ to Fe 2+ and reduce a portion of the dissolved Ti 4+ to Ti 3+.As the leaching continues, any further dissolved Fe 3+ will be simultaneously ...
A kinetic study of the leaching of iron and manganese from powdered tantalite-columbite ore by Hydrochloric Acid (HCl) and Sulphuric Acid (H 2 SO 4) solutions has been carried out. The effects of (a) particle size ranging from 63 to 250 μm (b) stirring speed ranging from 180 to 540 min -1 (c) acid concentration ranging from 4.0 to 10.0 M (d ...
Leaching time, stirring speed, temperature, hydrochloric acid concentration and hydrogen peroxide concentration were chosen as parameters. The optimum conditions for dissolution were found as leaching time of 240 min, a temperature of 70°C, hydrochloric acid concentration of 3 M, hydrogen peroxide concentration of 0.1 M and without stirring.
Dissolution Kinetics and Leaching of Rutile Ore In Hydrochloric Acid. Download. Related Papers. A study of dissolution kinetics of a Nigerian galena ore in hydrochloric acid. By Folahan Adekola. Simultaneous Recovery of Total Iron and Titanium from Ilmenite Ore by Hydrometallurgical Processing.
Abstract A study on the quantitative leaching of iron ore in hydrochloric acid solution has been undertaken. The elemental composition of the iron ore was also carried out using ICP-MS technique. The major elements in the iron ore include: Fe
2.1.2 Acid leaching of ore samples for metallic content determination. This was carried out as described by the ISO (1998)procedure [11]. 1g of the grounded air dried ore sample was transferred into a 250 ml reaction vessel (Teflon digestion bomb). 10ml of the mixture of nitric acid and hydrochloric acid in a ration of 1:3 (aqua regia) was ...
From these analytical results, it is concluded that the ore was an iron ore. 3.2. Effect of Acid Concentration. The effect of 3:1 HCl-HNO 3 solution concentration on the dissolution of the iron ore was studied using the following concentrations; 1 M, 2 M, 4 M, …
Generally calcination of the iron ore prior to leaching increased the rate of removal of Phosphorus from the ore. The kinetic study of the leaching mechanism of the phosphorus removal by the acids revealed that leaching with citric acid has an activation energy of 12.6KJ/mol, and hence it is
Besides that, Alafara et al. [8] also studied the leaching kinetic of Nigerian ilmenite ore by HCl acid. In their study, 77% of iron-ore was dissolved within 120 min at a stirring speed of 360 rpm
Experimental results showed that the ore dissolution increases with increasing acid concentration and temperature and decreases with increasing particle size fraction. With 2 mol/L H 2 SO 4 solution, 60.2% of the ore dissolved within 120 minutes using <90µm particle size at a temperature of 75°C with moderate stirring (300 rpm).
Research on high-pressure hydrochloric acid leaching of scan-dium, aluminum and other valuable components from the non-magnetic residues obtained from red mud after iron re-moval Dmitry Zinoveev 1,*, Pavel Grudinsky 1, Ekaterina Zhiltsova 1,2, Darya Grigoreva 1, Anton Volkov 3, Valery Dyu-banov 1 and Alexander Petelin 4
The subject of this study is leaching process of nickel-bearing laterite ore from Ržanovo, R. Macedonia. The influence of sulfuric acid concentration (0.5, 1 and 3 M H2SO4) on the extracted Ni (%, wt.) was studied. The leaching process intensified by magnetic stirring at different temperatures (298, 323, 348 and 363 K) in the time interval of 120 min. was performed.
Kinetic study of the leaching of powdered ilmenite ore was carried out in highly concentrated hydrochloric acid (11.3–11.6 mol dm −3) at temperatures of 30 to 80 °C.The changes in shape and grain size of the ore particles with progress of the leaching was simultaneously observed with X-ray diffraction and electron microscope techniques.
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نشانی: شماره 1688، جاده شرقی گاوک، منطقه جدید پودونگ، شانگهای، چین.
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