Patrícia Leitão, Aurora Futuro
The average global recovery rates for processing scheelite ores by physical methods typically range from 50 to 70%, and achieving a minimum grade of 60% WO3 in concentrates poses significant challenges. This research aimed to explore direct hydrometallurgical processing as a viable economic alternative for low-grade concentrates and medium- to high-grade ores, thereby enhancing recovery rates while minimizing penalties associated with concentrate grades. Specifically, the study focused on sodium carbonate leaching, which offers advantages like selective dissolution of problematic metals while facing challenges related to high temperature and pressure requirements. To assess feasibility, various operational parameters—including temperature, pressure, and reagent concentration—were rigorously tested using samples from both skarn and chalcopyrite-scheelite ore bodies. Results indicated that optimized operating conditions, despite being milder than industry norms, resulted in higher carbonate consumption but allowed for effective leaching. This research paves the way for potential industrial application by facilitating straightforward scale-up to pilot-plant design and optimization, making alkaline pressure leaching a promising method for scheelite processing.
@article{290a2b50-0a7b-4107-b0cb-0f05da966cfa,
title={Direct Pressure Alkaline Leaching of Scheelite Ores and Concentrates},
author={Patrícia Leitão and Aurora Futuro},
year={2019},
language={pt}
}TY - JOUR TI - Direct Pressure Alkaline Leaching of Scheelite Ores and Concentrates AU - Patrícia Leitão AU - Aurora Futuro PY - 2019 LA - pt ER -
Mark E. Schlesinger, Matthew J. King
This book presents a comprehensive overview of the principles and practices of copper extraction metallurgy. The objective is to provide both a theore
FATHI HABASHI
In the past few years, extractive metallurgy has been advancing gradually, despite the absence of remarkable new ideas. This paper aims to summarize t
P Card, J Canterford
This document presents a collection of papers from the METPLANT 2011 conference focusing on metallurgical plant design and operating strategies. The o
The Australasian Institute of Mining and Metallurgy
This conference, held in Perth, Western Australia, focuses on the latest advancements in metallurgical processing plant design and operational strateg
C.N. Mpinga, J.J. Eksteen
Platinum Group Metals (PGMs), often with associated gold, have very few occurrences where they are present in an ore deposit at economically extractab