Henock-Michel Mwanat

• Master of Science in metallurgy and materials
• University of Lubumbashi

Faced with a multiple input and multiple output (MIMO) system, it is imperative to find digital approaches and tools capable of making the optimization of a system whose variables are difficult to control efficiently. This paper demonstrates how, through the multi-criteria decision analysis (MCDA) approach, the leaching of a complex Cu-Co ore syste...

The removal of Fe 2+ and Mn 2+ from cobalt sulfate-saturated solutions is frequently problematic for Cu-Co hydrometallurgical process performance. Among the applied and developed methods for the removal of these metals, adsorption has drawn less attention. This study investigates on the removal of Fe 2+ and Mn 2+ in industrial cobalt solutions know...

The effects of operating conditions on copper, iron, and cobalt dissolution from sulfide ores in sulfuric acid–sodium chloride media are predicted using an artificial neural network (ANN) model. The artificial neural network model was developed, trained, and predicted using the feed-forward back-propagation (BP) algorithm. The sulfuric acid concent...

This study investigated the operating parameters that affect the kinetic dissolution of copper and cobalt from sulfidic ores. The sulfuric acid concentration, temperature, sodium chloride concentration, particle size range, and leaching time were selected to deduce the kinetic mechanism of the leaching reaction. Other parameters, such as a stirring...

In this study, an ASPEN Plus model in steady state, based on experimental studies, was developed to investigate the leaching behavior of copper and cobalt minerals in sulfuric acid-sodium metabisulfite media. The experimental results indicated that copper and cobalt dissolution efficiencies reach 91 and 72%, respectively. The integration of experim...

L’élimination du fer et du manganèse des solutions saturées en sulfate de cobalt est très souvent problématique pour la performance du processus. Elle impacte la qualité des produits finaux de cobalt à obtenir ultérieurement en raison des états d’oxydation dans lesquels ces deux cations se retrouvent initialement et de leur plage de pH de précipita...

This study is dedicated to exploring the effect of pH, leaching time, ferrous sulfate amount, temperature, as well as their interaction on the dissolution of cobalt by response surface methodology. The ferrous sulfate was used as an effective reducing agent for the dissolution of heterogenite, which constitutes the main cobalt mineral found in Cong...

Cobalt hydroxide was precipitated in three stages at various pH levels in the range and redox potential from lime

The leaching process of cobalt using a wide range of experimental variables is described. The treated cobalt samples were from the Kalumbwe Mine in the south of the Democratic Republic of Congo. In this study, a predictive model of cobalt recovery using both the Taguchi statistical method and an artificial neural network (ANN) algorithm was propose...

This study is focused on the froth flotation reprocessing of a copper mineral from flotation tailings. The effects of flotation parameters including pulp density, collector dosage, frother dosage, and dispersant dosage were statistically examined to obtain an effective approach for concentrating copper minerals. The sample ore used in this study wa...