Zobrazeno 1 - 10
of 116
pro vyhledávání: '"Roberto Galery"'
Publikováno v:
REM: International Engineering Journal, Vol 77, Iss 1, Pp 49-56 (2023)
Abstract Recent events involving iron ore tailings dam collapses have emphasized the need for developing alternative ways of depositing tailings. This study aims to evaluate the effects of using three hydroxamates and a sulfosuccinamate as collectors
Externí odkaz:
https://doaj.org/article/9412c3ae595b4a8482ab06a72d85f0c5
Autor:
Sofia Bessa, Marlo Duarte, Gabriela Lage, Isabela Mendonça, Roberto Galery, Rochel Lago, Ana Paula Texeira, Fernando Lameiras, Maria Teresa Aguilar
Publikováno v:
Buildings, Vol 14, Iss 2, p 362 (2024)
Mineral extraction is of ultimate importance for the economies of different countries, and Brazil is one of the world’s leading producers of iron ores. Unfortunately, dams are still the main problem, mainly in Minas Gerais, especially after the Fun
Externí odkaz:
https://doaj.org/article/ca19b31e777c4d4995a6b6786abef3f4
Publikováno v:
REM: International Engineering Journal, Vol 75, Iss 1, Pp 37-44 (2021)
Abstract The sizing of vibrating screen machines can be done by various methods, most of them based on the classic method of Allis Chalmers (ACM). Due to the wide diffusion and applicability, the Peter King (PKM) and Karra (KM) methods present great
Externí odkaz:
https://doaj.org/article/48f2baf80e9245ed9285fa72a2882cc8
Publikováno v:
REM: International Engineering Journal, Vol 75, Iss 1, Pp 67-72 (2021)
Abstract In the search for alternatives to obtain more information from rock tests and to make them more accessible, this study applies the Digital Image Correlation technique (DIC 2D) in a diametral compression test called Brazilian Test, comparing
Externí odkaz:
https://doaj.org/article/65ba35f8970a4c9f8e0e300817704aa8
Autor:
Kelly Cristina Ferreira, Roberto Galery, Luiz Cláudio Monteiro Montenegro, Antônio Eduardo Clark Peres
Publikováno v:
Holos, Vol 7, Iss 0, Pp 59-64 (2015)
O parâmetro mais amplamente utilizado no dimensionamento de moinhos é o WI de Bond. Contudo, dependendo das características físicas do minério nem sempre é possível determina-lo de forma adequada. Alguns minérios, ao serem preparados para o t
Externí odkaz:
https://doaj.org/article/704369fb2a82484cb3855949ce080d92
Autor:
Luciana Tavares Duarte, Vanessa de Freitas Cunha Lins, César Mariano, José Roberto Tavares Branco, Magno Pinto Collares, Roberto Galery
Publikováno v:
Polímeros, Vol 13, Iss 3, Pp 198-204 (2003)
Neste trabalho foram analisados recobrimentos de poli(tereftalato de etileno), PET, depositados em aço carbono através da técnica de aspersão térmica à combustão, e produzidos a partir de pós oriundos de processos de moagem, em moinho de bola
Externí odkaz:
https://doaj.org/article/b11cab6361b142eeacbfa953c6dcbb36
Autor:
Luiz Alberto Carvalho, Felipe Ribeiro Souza, Leonardo Soares Chaves, Beck Nader, Taís Renata Câmara, Vidal Félix Navarro Torres, Roberto Galery
Publikováno v:
REM: International Engineering Journal, Vol 71, Iss 4, Pp 621-629
Abstract Geologic modeling is an important step in determining the benefits and final pit dimensions for mining operations. Geostatistical models and distance-based functions are the main methods used to estimate the grade behavior. However, these tw
Externí odkaz:
https://doaj.org/article/1bdf1247a56c4a70be127bf7ca67b874
Autor:
Felipe Ribeiro Souza, Taís Renata Câmara, Vidal Félix Navarro Torres, Beck Nader, Roberto Galery
Publikováno v:
REM: International Engineering Journal, Vol 72, Iss 4, Pp 625-634
Abstract The production rate of a mining operation has an important effect on the operational cycle and gross profit, which are often evaluated based on engineering practices. Assessment of the economic performance of mine operations in mining engine
Externí odkaz:
https://doaj.org/article/c2e5164b7c684d1cb1a6710de7565b95
Autor:
Felipe Ribeiro Souza, Hudson Rodrigues Burgarelli, Alizeibek Saleimen Nader, Carlos Enrique Arroyo Ortiz, Leonardo Soares Chaves, Luiz Alberto Carvalho, Vidal Félix Navarro Torres, Taís Renata Câmara, Roberto Galery
Publikováno v:
REM: International Engineering Journal, Vol 71, Iss 1, Pp 97-104
Abstract This study is focused on Direct Block Scheduling testing (Direct Multi-Period Scheduling methodology) which schedules mine production considering the correct discount factor of each mining block, resulting in the final pit. Each block is ana
Externí odkaz:
https://doaj.org/article/60b74717205f42e4b3ebec0cc821b54f
Autor:
Hudson Rodrigues Burgarelli, Felipe Ribeiro Souza, Alizeibek Saleimen Nader, Vidal Félix Navarro Torres, Taís Renata Câmara, Carlos Enrique Arroyo Ortiz, Roberto Galery
Publikováno v:
REM: International Engineering Journal, Vol 71, Iss 2, Pp 275-280
Abstract Mineral projects are composed of geological, operational and market uncertainties, and reducing these uncertainties is one of the objectives of engineering. Most surveys assess the impact of geological and operational uncertainties on the mi
Externí odkaz:
https://doaj.org/article/0fb85e163acd4995a6aa68bb5cb34b76