Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Fernando Antonio Freitas Lins"'
Publikováno v:
Brazilian Journal of Business. 3:3647-3660
A expansão da população, atrelada à elevação dos níveis de produção e consumo de bens, vem intensificando a geração de resíduos sólidos em áreas urbanas. Estima-se que no Brasil são gerados anualmente 2 milhões de toneladas de resídu
Publikováno v:
Anais do 59º Congresso da Sociedade Brasileira de Economia, Administração e Sociologia Rural (SOBER) e 6º Encontro Brasileiro de Pesquisadores em Cooperativismo (EBPC).
Autor:
Ana Cristina Ribeiro-Duthie, Lúcia Helena Xavier, Fernando Antonio Freitas Lins, Ellen Cristine Giese
Publikováno v:
Resources Policy. 74:101467
Reuse and recirculation of products and materials are the basis of the concept of the circular economy (CE). TheCE is an innovative proposal that can result in positive impacts such as reduced demand for raw materials,reduced consumption of basic res
Publikováno v:
International Journal of Mineral Processing. 71:31-44
Recent literature has showed the potentiality of microorganisms as a flotation reagent. In the present study, a non-pathogenic hydrophobic bacterium ( Rhodococcus opacus ) has been investigated as a flotation reagent for the hematite–quartz system.
Autor:
C. R. F. Albuquerque, Fernando Antonio Freitas Lins, Marisa Bezerra de Mello Monte, L. A. Tondo, Achilles Junqueira Bourdot Dutra
Publikováno v:
Minerals Engineering. 15:1113-1120
In this paper, the influence of the oxidation state of pyrite and arsenopyrite on the flotation of an auriferous sulphide ore was investigated by different techniques, including electrode, pulp potentials, DRIFT spectroscopy and microflotation tests.
Autor:
Marisa Bezerra de Mello Monte, Fernando Antonio Freitas Lins, Antonieta Middea, T.V. Subrahmanyam, E. Valdiviezo
Publikováno v:
Minerals Engineering. 12:1347-1357
Contact angles of quartz particles were calculated from the ratios of particle wetting rates of water (polar) and toluene (non-polar) through compact particle beds, contained in capillaries (capillary penetration of liquids). For comparison, the cont
Publikováno v:
International Journal of Mineral Processing. 51:255-267
The differential flotation of free gold from sulphide minerals can be interesting for both economic and environmental reasons. The use of hydrogen peroxide as an oxidizing agent in the selective flotation of gold from pyrite with potassium amyl xanth
Publikováno v:
Minerals Engineering. 7:1401-1409
The present work deals with gold grains recovery by means of coal-oil agglomerates. Among several hydrophobic materials used, a specific type of coal proved to be more suitable to form agglomerates. Diesel oil, kerosene and vegetable oils were used a
Publikováno v:
Minerals Engineering. 6:267-277
In this work an investigation on the influence of pulp density, aeration and agitation speed on froth flotation was carried out in bench-scale tests with ground quartz and gold mixtures, where the grain size of the gold particles ranged from medium (
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