On-going technological developments, especially in the field of microelectronics and
communication have reflected in concomitant increase in the demand for strategic metals …

The potential of solvent extraction using Cynanex® 272 for the recovery of zinc from spent
zinc carbon batteries after a prior leaching in hydrochloric acid has been investigated. The …

We report a fluoride-free comparative study with promising results of an alkali-assisted
roasting with KOH and water-based leaching of the Nigerian and Rwandan columbite …

In this work, mineralogical and physical characterization of low-grade tantalum-tin ore-
samples from Ntunga and Kamonyi of Rwanda were carried out using various techniques …

Qualitative analysis of three mineral samples from northern Mozambique was accomplished
by X-ray diffraction (XRD), microscopy, scintillation, and magnetic determination. Chemical …

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 …

The dissolution kinetics and mechanisms of reaction of Udi clay in nitric acid have been
studied. Leaching temperature, acid concentration, particle size, solid-to-liquid ratio, and …

The beneficiation methods for Ethiopian Kenticha pegmatite–spodumene ores were
assessed through mineralogical and quantitative analyses with X-ray diffraction (XRD) and …

Tantalum slag is a type of high-grade tantalum resource with great recovery value. In this
paper, a low fluorine process, including alkali pressure decomposition, low-acid …

Since the second world war, the demands for pure elements and other metals hitherto
considered rather rare, and usually found in association as complex mineral ores, have …