Matches in SemOpenAlex for { <https://semopenalex.org/work/W2167752746> ?p ?o ?g. }
Showing items 1 to 48 of
48
with 100 items per page.
- W2167752746 abstract "The objective of this work was study the possibility of concentration of Serra Serpentina ore, considered of iron low grade by direct flotation. Were checked three collectors: sodium oleate, commercial hydroxamate (AERO 6493), commercial sulfonate (AERO 825) and as depressor was used sodium metassilicate. At a first moment, it was made microflotation studies of pure mineral samples (hematite and quartz), using Hallimond modified tube with three collectors and depressor, looking for the pH that given the better selectivity in separation between these two minerals. The higher flotability of hematite and quartz was achieved in pH 7 and 9, respectively. When used hydroxamate was, respectively, 7 and 10. For sulfonate was 4 and 5, respectively. It was determined the zeta potential curves of these minerals that was conditioning with distillated water, in collectors solutions and in sodium silicate solution follow collector addition. The PZC values for hematite and quartz was 7.5 and 1.8, respectively. Finally, was made tests of reverse flotation (using starch/amine) and direct (using sodium oleate, hydroxamate, sulfonate and sodium silicate as depressor) in batch scale using factorial design of experiments, with replica. In reverse flotation a test using 200 g/t of corn starch and 150 g/t of EDA amine was obtained a concentrate with 66.4% of iron grade, 3.8% of silica and iron metallurgical recovery 75.8%. In direct flotation tests using 1200 g/t of sodium oleate and 600 g/t of sodium silicate the concentrate had 55.8% of Fe, 14.4% of silica and 88% of iron metallurgical recovery. For the direct flotation tests using 1200 g/t of hydroxamate and 1500 g/t of sodium silicate, the iron grade in concentrate was 61.5%, silica 9.8% and iron metallurgical recovery was 77.9%. In direct flotation using 1200 g/t of sulfonate and 2100 g/t of sodium silicate, the grades in concentrate was 57.9% of iron, 13.3% of silica and iron metallurgical recovery 89.9%. In direct flotation was achieved higher iron metallurgical recovery (77.9% to 89.9%) than reverse flotation (75,8%). However, the iron grade in direct flotation concentrate (57.9% to 61.5%) was lower that the iron grade in reverse flotation (66.4%). The silica grade in direct flotation concentrate (9.8% to 14.4%) was very higher that the silica grade in reverse flotation concentrate (3.8%)." @default.
- W2167752746 created "2016-06-24" @default.
- W2167752746 creator A5016572271 @default.
- W2167752746 date "2009-01-01" @default.
- W2167752746 modified "2023-09-27" @default.
- W2167752746 title "Flotação direta de minério de ferro." @default.
- W2167752746 cites W1974411094 @default.
- W2167752746 cites W1987136326 @default.
- W2167752746 cites W2034092891 @default.
- W2167752746 cites W2034836687 @default.
- W2167752746 cites W2034990752 @default.
- W2167752746 cites W2044802965 @default.
- W2167752746 cites W2072193182 @default.
- W2167752746 cites W2128974055 @default.
- W2167752746 hasPublicationYear "2009" @default.
- W2167752746 type Work @default.
- W2167752746 sameAs 2167752746 @default.
- W2167752746 citedByCount "1" @default.
- W2167752746 countsByYear W21677527462015 @default.
- W2167752746 crossrefType "journal-article" @default.
- W2167752746 hasAuthorship W2167752746A5016572271 @default.
- W2167752746 hasConcept C13965031 @default.
- W2167752746 hasConcept C178790620 @default.
- W2167752746 hasConcept C185592680 @default.
- W2167752746 hasConcept C191897082 @default.
- W2167752746 hasConcept C192562407 @default.
- W2167752746 hasConcept C199289684 @default.
- W2167752746 hasConcept C2779131772 @default.
- W2167752746 hasConcept C2779947509 @default.
- W2167752746 hasConcept C43617362 @default.
- W2167752746 hasConcept C537181965 @default.
- W2167752746 hasConceptScore W2167752746C13965031 @default.
- W2167752746 hasConceptScore W2167752746C178790620 @default.
- W2167752746 hasConceptScore W2167752746C185592680 @default.
- W2167752746 hasConceptScore W2167752746C191897082 @default.
- W2167752746 hasConceptScore W2167752746C192562407 @default.
- W2167752746 hasConceptScore W2167752746C199289684 @default.
- W2167752746 hasConceptScore W2167752746C2779131772 @default.
- W2167752746 hasConceptScore W2167752746C2779947509 @default.
- W2167752746 hasConceptScore W2167752746C43617362 @default.
- W2167752746 hasConceptScore W2167752746C537181965 @default.
- W2167752746 hasLocation W21677527461 @default.
- W2167752746 hasOpenAccess W2167752746 @default.
- W2167752746 hasPrimaryLocation W21677527461 @default.
- W2167752746 isParatext "false" @default.
- W2167752746 isRetracted "false" @default.
- W2167752746 magId "2167752746" @default.
- W2167752746 workType "article" @default.