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Recovery of Iron Ore Tailings by Column Flotation

Journal of Minerals and Materials Characterization and Engineering 2013年第5期1卷 212-216页

作者： Plinio Eduardo Praes Rodrigo Oscar de Albuquerque antonio furquim oliveira luz Centro de Desenvolvimento da Tecnologia Nuclear(CDTN) Comissao Nacional de Energia NuclearBelo HorizonteBrazil

The exploration of iron ore in small mining companies results in a large amount of unrecovered fine material, representing 35% of the run of mine. Millions of tons of useful minerals are discarded every year into tailings, incurring operation costs, raising production losses and environmental impact. In addition to the disposal of 300 t/h of this material, millions of tons are already stored in tailings. CDTN carried out a study of the process in a column flotation pilot plant installed in the mining facilities with a slime sample, with a view to recovering this sludge using the reverse flotation technique. The aim of this experiment was to obtain a final concentrate whose Fe content assigned 66% with a SiO2 content below 0.8% and P lower than 0.03%. The results showed that the ultrafine flotation is an economical alternative if the improvement of the recovery in the mineral sector is concerned. Ultrafine flotation can also be assessed when dealing with reduction and treatment of effluent discharged in the environment.

关键词： Flotation Iron Ore Slimes

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Pancreatitis after endoscopic retrograde cholangiopancreatography:A narrative review

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World Journal of Gastroenterology 2021年第20期27卷 2495-2506页

作者： Igor Braga Ribeiro Epifanio Silvino do Monte Junior antonio Afonso Miranda Neto Igor Mendonça Proença Diogo Turiani Hourneaux de Moura Mauricio Kazuyoshi Minata Edson Ide Marcos Eduardo Lera dos Santos Gustavo de oliveira luz Sergio Eiji Matuguma Spencer Cheng Renato Baracat Eduardo Guimarães Hourneaux de Moura Department of Gastrointestinal Endoscopy Unit University of São Paulo School of MedicineSão Paulo 05403-010Brazil

Acute post-endoscopic retrograde cholangiopancreatography pancreatitis(PEP)is a feared and potentially fatal complication that can be as high as up to 30%in high-risk ***-examination measures,during the examination and after the examination are the key to technical and clinical success with a decrease in adverse *** studies have debated on the subject,however,numerous topics remain controversial,such as the effectiveness of prophylactic medications and the amylase dosage *** review was designed to provide an update on the current scientific evidence regarding PEP available in the literature.

关键词： Endoscopic retrograde cholangiopancreatography Pan-creatitis Postendoscopic retrograde cholangiopancreatography pancreatitis Adverse events Pancreatitis Prevention

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