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Master's Dissertation
DOI
https://doi.org/10.11606/D.3.2005.tde-01022024-101601
Document
Author
Full name
Euler Elias Neder
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2005
Supervisor
Committee
Leal Filho, Laurindo de Salles (President)
Matai, Patricia Helena Lara dos Santos
Monte, Marisa Bezerra de Mello
Title in Portuguese
O uso de aminas graxas e seus derivados na flotação de minérios brasileiros.
Keywords in Portuguese
Alumina (Uso)
Flotação de minérios
Abstract in Portuguese
Os coletores catiônicos têm sido utilizados na flotação de minerais desde o final dos anos 30 e a química desses compostos é baseada nas aminas e seus derivados. No Brasil, esses produtos estão entre os principais reagentes utilizados pela indústria mineral. A utilização dessa classe de produtos como coletores de flotação é mundialmente reconhecida em processos de concentração de sais solúveis e oximinerais. Mesmo assim, apesar de sua grande aplicação, existem poucas publicações em português que reúnem e conectam os conceitos de flotação com as propriedades das aminas. Nessa dissertação, discorreu-se sobre a química desses compostos discutindo e revisando suas rotas de produção industrial, as variáveis que afetam a qualidade, as propriedades das aminas como tensoativos e a sua correlação com os processos de flotação. Além disso, os mecanismos de coleta em sais solúveis e oximinerais foram detalhados. Ao final do trabalho foram apresentadas sugestões de usos de moléculas já existentes bem como de novos produtos que têm potencial aplicação como coletores.
Title in English
Untitled in english
Keywords in English
Alumina (Use)
Ore flotation
Abstract in English
Cationic collectors have being utilized in froth flotation since that end of 30's and their chemistry are based on fatty amines and their derivatives. In Brazil, those chemicals are among the most important reagents used by the mineral industry. Their application as collectors are well known and recognized worldwide in flotation processes of soluble salts, silicates and other oxidized ores. Despite of the extensive use, the availability of local publications covering their chemistry and applications are limited. This dissertation primarily reviews the amine based products used as flotation collectors discussing their industrial production routes, variables affecting the quality, the properties of the amines as surfactants and the correlation of those properties with the flotation processes. The interaction mechanisms of amines and minerals (soluble salts, oxides and silicates) were discussed in the light of their chemistry and properties. The reminder of the thesis suggests that some new and existing amines could be exploited by the industry as an option for the collectors presently in use.
 
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Publishing Date
2024-02-01
 
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