Open Access. Powered by Scholars. Published by Universities.®
- Institution
Articles 1 - 3 of 3
Full-Text Articles in Mining Engineering
Calcite Depression In Bastnaesite-Calcite Flotation System Using Organic Acids, Emmy Muhoza
Calcite Depression In Bastnaesite-Calcite Flotation System Using Organic Acids, Emmy Muhoza
Graduate Theses, Dissertations, and Problem Reports
Bastnaesite is the primary source of light REEs, namely cerium (Ce), lanthanum (La), praseodymium (Pr), neodymium (Nd), to name a few. Bastnaesite is typically concentrated using the froth flotation beneficiation method. Flotation of bastnaesite suffers from high reagent consumption due to the similar surface characteristics of bastnaesite and associated gangue minerals, including calcite. Additionally, complex stages of high-temperature conditioning are often required to suppress the detrimental impact of dissolved calcium ions on the flotation of bastnaesite. This research seeks to investigate the capabilities of organic acids in the bastnaesite-calcite flotation systems to selectively depress calcite minerals and effectively chelate calcium …
Investigation Of The Stability Of Liquid And Air Films By Synchronized Tri-Wavelength Reflection Interferometry Microscope, Yuesheng Gao
Investigation Of The Stability Of Liquid And Air Films By Synchronized Tri-Wavelength Reflection Interferometry Microscope, Yuesheng Gao
Dissertations, Master's Theses and Master's Reports
Liquid films are widely involved in many processes, such as froth flotation, oil extraction, foam/bubble stabilization, etc. In the meantime, air films are commonly seen in diverse fields like dust control, ink print, coating industry, and so on. Stabilities of these liquid/air films are of great importance to improve the processes. As more and more researchers are paying increasing attention to liquid/air films, tremendous efforts have been made to explore the properties of the films. On the one hand, some theoretical models have also been well developed in recent decades. State-of-the-art technologies, such as AFM, SFA, and RICM, have also …
Surface Chemisty Study Of Monazite Flotation In Coal Refuse Systems, Wencai Zhang
Surface Chemisty Study Of Monazite Flotation In Coal Refuse Systems, Wencai Zhang
Theses and Dissertations--Mining Engineering
Rare earth mineral recovery from alternative resources such as coal and coal byproducts is increasingly important to provide an opportunity for economic recovery from U.S. sources. Currently, China produces the majority of the 149,000 tons of rare earth elements used annually worldwide of which the U.S. imports 11% or around 16,000 tons. There are no significant mining operations producing rare earth elements in the U.S. However, there are many U.S. sources containing rare earth minerals such as monazite including heavy mineral sand and phosphate operations. Monazite mineral particles of a few microns have also been detected in Fire Clay seam …