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Extraction of niobium and tantalum from ferrocolumbite by hydrofluoric acid pressure leaching
(Elsevier Science, 2015-07)
Abstract Pressure acid leaching was used to extract niobium and tantalum from a ferrocolumbite ore. The leaching was carried out in a pressure reactor using hydrofluoric acid as leachant. Various parameters, such as ...
Characterisation of biocatalysts immobilised in niobium-a new inorganic solid support
(Wiley-blackwellHobokenEUA, 2013)
THERMAL STABILITY OF THE IMMOBILIZED FRUCTOSYLTRANSFERASE FROM Rhodotorula sp.
(Brazilian Soc Chemical EngSao PauloBrasil, 2011)
O nióbio no Brasil - um estudo sobre a variação do valor das exportações do minério (1999-2016)
(Universidade Federal de UberlândiaBrasilRelações Internacionais, 2017)
Hydrogeochemical study of surface waters from Araxá city, Minas Gerais State, Brazil
(2020-06-01)
Barreiro area at Araxá city, Minas Gerais State, Brazil, has been well-known since the 19th century when started the studies of the healing properties for the tuberculosis treatment of the natural mineral waters of the ...
Caracterização estrutural e propriedades mecânicas e tribológicas de ferro fundido branco alto cromo com adição de nióbio
(Universidade Federal de Minas GeraisUFMG, 2018-01-29)
Abrasive wear is one of the most common industrial problems, especially in mining. The abrasive wear mechanism depends strongly on material properties (hardness and toughness) as well as on the tribosystem (hardness and ...
Adição de elementos de liga (boro e nióbio) em ferro fundido branco alto cromo : uma análise comparativa do ganho de resistência ao desgaste abrasivo versus custo
(Universidade Federal de Minas GeraisBrasilENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICAPrograma de Pós-Graduação em Engenharia Metalúrgica, Materiais e de MinasUFMG, 2020-09-23)
In the case of mining companies, abrasive wear is the cause of operational problems and generates high costs. High chromium white cast iron alloys have been widely used in mining, as they are a class of materials highly ...