Ore Characterization and Processing Plant Remediation for a Brazilian Tin Mine
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PublisherThe University of Arizona.
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AbstractExecutive Summary: To further understand the separation process used by CSN-ERSA in Brazil, ore characterization of final concentrate samples was determined through Energy Dispersive Spectroscopy (EDS) testing. Characterization of each concentrate shows a significant amount of heavy metal contamination; a result of inefficient gravity separation. CSN is looking to implement a mining method suitable for extracting ore at the Village site. The three options of mining methods are open-pit with gravel pumping, dredging, and a conveyor system. The conveyor system is recommended as the primary mining method because conveyors can upgrade production capacity, along with minimizing capital and annual costs. Also, they provide path adaptability by operating in steeper terrain. Gravity separation methods and recommendations for mineral processing at the Taboquiñha site is discussed. These include spirals, hydrocyclones, Knelson, Falcon, and tables. The final recommendation is a combination of methods, with variation depending on focus. Much like current operations, spirals and hydrocyclones can receive most of the material. For recovering fines, installing a Falcon gravity separator is recommended. The currently reprocessed middling could see improvements if a table separator were installed. For recovering tin lost in the tailings, it is recommended to use a Falcon separator.
Degree ProgramHonors College