Results 231 to 240 of about 46,745 (267)

Leaching of goethite in acid solutions

2011
The leaching of goethite in solutions of perchloric, sulphuric, and hydrochloric acids and in perchloric acid in presence of sulphur dioxide has been investigated. Suspensions of goethite powder (-65, +150 mesh) were leached over a wide range of temperatures, acid concentrations and sulphur dioxide pressures.
openaire   +1 more source

Leaching Kinetics of Calcined Magnesite in Citric Acid Solutions

Industrial & Engineering Chemistry Research, 2006
The kinetics of leaching of calcined magnesite by citric acid solution was studied. The effects of reaction temperature, particle size, and acid concentration were investigated. The leaching data showed that the reaction is under chemical kinetics control with an activation energy of 39.1 kJ mol-1. Additionally, the fact that leaching was controlled by
LAÇİN, Ömer, DEMİR, Fatih, DÖNMEZ, Bünyamin   +2 more
openaire   +3 more sources

Extraction of alumina from coal fly ash using an acid leach-sinter-acid leach technique

Hydrometallurgy, 2015
Abstract In this paper, a two-step acid leach process for the extraction of aluminium from coal fly ash has been conducted using an acid leach-sinter-acid leach technique. The technique was formulated based on the dissimilar response characteristics of the amorphous and mullite alumina phases present in coal fly ash.
A. Shemi, S. Ndlovu, V. Sibanda, L.D. van Dyk   +3 more
openaire   +1 more source

Leaching of Magnesite and Dolomite by Hydrochloric Acid

The primary objective of this thesis was to determine the optimum process parameters for the leaching of magnesium carbonate. The ore used for the experiments was a cryptocrystalline magnesite ore from a 516 million tonne magnesite resource located North West of Leigh Creek in South Australia.
openaire   +2 more sources

Acid leaching of scheelite concentrates

2005
Se estudió la lixiviación acida, en medio clorhídrico, de un concentrado de wolframio (scheelita, CaWO4). De lo anterior, se obtuvo un sólido insoluble (H2WO4), que se trató con una solución alcalina de hidróxido de sodio, lográndose la completa solubilización del wolframio como ion wolframato (WO4-2 ). La fracción transformada de wolframio aumenta con
Navarro, P., Vargas, C., Alguacil, F. J.
openaire   +1 more source

Acid leaching of phlogopite

International Geology Review, 1979
V. K. Bulafov, B. P. Gradusov, A. V. Zotov   +2 more
openaire   +1 more source

Comparison and evaluation of vanadium extraction from the calcification roasted vanadium slag with carbonation leaching and sulfuric acid leaching

Separation and Purification Technology, 2022
, Guoquan Zhang, Juhua Zhang
exaly  

Leaching with Acids

2019
C. K. Gupta, T. K. Mukherjee
openaire   +1 more source

Effect of activator on kinetics of direct acid leaching of vanadium from clay vanadium ore

Separation and Purification Technology, 2022
Guohua Ye
exaly  

Closed-vessel microwave leaching of valuable metals from spent lithium-ion batteries (LIBs) using dual-function leaching agent: Ascorbic acid

Separation and Purification Technology, 2021
J C Liu, Jenni Lie
exaly