Evaluation of Variables Determining Leaching Efficiency in …
Ever since its discovery, vanadium has been used in numerous fields such as steel, aerospace, and chemical industries. The extraction process of vanadium from …
Extraction of vanadium from direct acid leaching solution of …
Semantic Scholar extracted view of "Extraction of vanadium from direct acid leaching solution of clay vanadium ore using solvent extraction with N235" by Y. Guohua et al.
A literature review on leaching and recovery of vanadium
Non-salt roasting technology was suitable for limited vanadium resource. Vanadium was leached out after roasting and the leaching medium was divided into …
Precious Metal Heap Leach Design and Practice
1 Precious Metal Heap Leach Design and Practice Daniel W. Kappes1 ABSTRACT Heap leaching of gold and silver ores is conducted at approximately 120 mines worldwide.
Step-Adsorption of Vanadium (V) and Chromium (VI) in the …
In this paper, separation and recovery of vanadium (V) and chromium (VI) from a leaching solution was investigated by adsorption of vanadium (V) with …
Experimental design and optimization of leaching process
The paper deals with experimental design and optimization of leaching process of uranium and associated metals from low-grade, Polish ores. The chemical elements of interest for extraction from ...
Step-Adsorption of Vanadium (V) and chromium (Vi) in …
The adsorption process of vanadium was well described by the pseudo-second-order model and the adsorption isotherm was conformed to the Langmuir model. (2) The …
Sulfuric acid leaching and recovery of vanadium from a …
In order to recover vanadium from vanadium-bearing black shale efficiently, a hydrometallurgical process is developed in this paper to treat the concentrate beneficiated from stone coal ore, in which the vanadium mainly occurs in the form of Fe 3-x V x O 4 spinel. At the first step, the leaching behaviors of Fe and V from the …
New Insights into the Penetration Depth of Sulfuric Acid and Leaching …
In the process of sulfuric acid curing-leaching vanadium-bearing stone coal, the curing effect is very important. The main purpose of this study is to capture the difference in the curing effect between coarse and fine stone coal, with a V2O5 content of 0.88%. In this work, the effects of various factors such as sulfuric acid concentration, …
Recovery of Gallium from Bauxite Residue Using Combined …
Using H2C2O4, the highest Ga leaching efficiencies were achieved, compared to other acids. The achieved leaching experimental results were considered for the construction of a design of experiment (DOE) model to achieve optimal conditions for Ga extraction using H2C2O4. These values were validated by experiments which …
A new approach for direct leaching of vanadium from LD …
Semantic Scholar extracted view of "A new approach for direct leaching of vanadium from LD converter slag" by S. Mirazimi et al.
Leaching behaviour and the solution consumption of uranium–vanadium ore
The objective of this study is to investigate the alkaline leaching of a uranium-vanadium ore in the course of heap leaching and evaluate two simplified first-order kinetic models-a general form and a second based on the reagent consumption per …
Leaching and adsorption circuits – for better metal extraction
The Leach-CIP circuit is a system comprised of separate leaching and adsorption tanks. In leaching, ore which has been ground to pulp is placed in agitated tanks with sodium cyanide solution and gold and silver is dissolved into the slurry solution.
Vanadium recovery from clay vanadium mineral using an acid leaching
The property analysis of a certain argillaceous vanadium ore revealed that the argillaceous vanadium ore belonged to acidic ores and was suitable for leaching using sulfuric acid based on its main ...
Leaching Kinetics of Vanadium from Calcium-Roasting High …
Vanadium exists as multivalent valences in high-chromium vanadium slag, and it is hard to leach out in low valence. Electro-oxidation technology has been applied to enhance the leaching process of calcium-roasting high-chromium vanadium slag. The effect of parameters that affect the leaching efficiency of vanadium including concentration of …
CIP/CIL Modelling
Derive the optimum design criteria based on the results of small scale experiments. Powerful design tool that uses results from standard leach and adsorption tests (bottle roll tests) to generate kinetic data that are fitted to leaching and carbon adsorption equations.
Oxidative Leaching Kinetics of Vanadium from the Vanadium …
Many technologies have been used to recover vanadium from solutions, such as hydrolysis, ammonium precipitation, 34,35 solvent extraction, 26,36−39 and ion exchange. 23,24,40−44 In this work, adsorption with melamine was introduced to recover vanadium. 45,46 The recovery of vanadium from the leaching solution was conducted …
Experimental design and optimization of leaching
Semantic Scholar extracted view of "Experimental design and optimization of leaching process for recovery of valuable chemical elements (U, La, V, Mo, Yb and Th) from low-grade uranium ore." by Grażyna Zakrzewska-Kołtuniewicz et al.
Vanadium properties, toxicity, mineral sources and
Vanadium chemicals, known as the "vitamins of the modern industry," are major resources widely used in the petroleum, steel, batteries and catalyst industry. Vanadium is also essential in biological systems. Here we review vanadium properties, mineral sources and recovery methods such as blank, sodium and calcium roasting, …
Efficient Separation and Recovery of Vanadium (V) from …
Hydrochloric acid leaching has been widely used in the recovery process of vanadium due to its efficient selectivity. It was necessary to further separate vanadium from hydrochloric acid leaching solution. Four extractants of P204, P507, Cyanex272, and N1923 were compared for extraction of vanadium from a simulated hydrochloric acid …
Effect of activator on kinetics of direct acid leaching of vanadium …
According to the characteristics of clay vanadium ore, a novel process of no-grinding and no-roasting direct activated acid leaching under atmospheric pressure, was proposed.
A New Route of Roasting-Flotation-Leaching for the …
In this work, a complete beneficiation technical route combining physical and chemical methods, namely a roasting-flotation-leaching scheme, is proposed to produce a qualified grade Ti-concentrate from altered Vanadium titanomagnetite (VTM) ore. Based on the character of the ore sample, it is recommended to recover the Ti-bearing minerals, …
Theoretical Modeling and Experimental Evaluation of Vanadium …
Recovering vanadium from vanadium titanium-magnetite (VTM) ore using (NH4)2C2O4 is a clean hydrometallurgical process, but the drawback is the low recovery and slow kinetics due to the formation of inhibitor. A novel energy-efficient mathematical model was derived for green leaching of VTM in which the mechanical activation (MA) …
Vanadium in phyllosilicate ores: Occurrence, crystal …
This article examines the nanoscale occurrence patterns of vanadium in phyllosilicates and correlates them with amenability to leaching. A large fraction of the global vanadium resource is hosted in phyllosilicate ores such as roscoelite and V-bearing chlorites, clays, and micas.
Enhanced effect of biochar on leaching vanadium and …
In addition, the high-density biochar system increased the adsorption and complexation of metal ions in the biochar pores, resulting in a decrease in the leaching rate of vanadium and copper in the liquid environment (Wang et al. 2016). Effects of biochar addition on bioleaching in columns
Synergistic Mechanism of Sodium Fluorosilicate and Sodium …
The extraction of vanadium from low-grade stone coal vanadium ore through direct acid leaching poses a significant challenge in terms of achieving high …
Vanadium extraction from black shale: Enhanced leaching …
During the direct acid-leaching process of vanadium extraction from black shale, the participation of fluoride ions greatly improves the leaching efficiency of vanadium.Its enhanced effect is influenced by the sulfuric acid concentration, amount of added fluoride, leaching temperature, and leaching time. The migration of fluoride ions …
Separation of vanadium and chromium by selective adsorption …
However, when vanadium is processed, chromium in the ore is usually leached with vanadium in metallurgical processing to form a chromium-containing vanadium leaching solution, seriously degrading the purity and quality of …
The process design of gold leaching and carbon-in-pulp …
Assuming that a gold ore has been effectively ground to ensure maximum economic liberation of gold, the circuits that will have the most effect on the successful operation of a gold plant will be that of the leaching and carbon-in-pulp circuit (CIP). The reagent and utilities operating costs associated with leaching, adsorption, elution and ...
Mechanism and kinetics study of vanadium leaching from …
• The leaching rate of vanadium increased by 46.7%. Abstract Landfilled metallurgical residues are valuable raw materials for the recovery of strategic vanadium resources. …