Search

Your search keyword '"Uribe, S"' showing total 26 results
Start Over Author "Uribe, S" Publisher elsevier bv
26 results on '"Uribe, S"'

4. Laparoendoscopic Rendezvous Procedure for Cholecysto-choledocholithiasis: Relevance of Anterograde Duodenum Guidewire Placement in Outcomes: A Single Series of 389 Cases from a Teaching Hospital in Santiago, Chile

Author

Riquelme, F., primary, Hudson, A., additional, Salazar, M., additional, Farfan, F., additional, Catan, F., additional, Muñoz, J., additional, Puelma, F., additional, Uribe, S., additional, Astudillo, C., additional, Tapia, C., additional, and Uribe, M., additional

Published
2022
Full Text
View/download PDF

12. Study of celestite flotation efficiency using sodium dodecyl sulfonate collector: factorial experiment and statistical analysis of data

Author

A. Martı́nez-L, A. Uribe S, F.R. Carrillo P, J. Coreño A, and J.C. Ortiz

Subjects
Chromatography, Chemistry, medicine.drug_class, Sodium, chemistry.chemical_element, Sodium silicate, Factorial experiment, Geotechnical Engineering and Engineering Geology, chemistry.chemical_compound, Factorial experimental design, Sulfonate, Geochemistry and Petrology, medicine, Statistical analysis, Strontium sulfate, Depressant
Abstract

Flotation tests of synthetic mixtures of celestite (SrSO 4 ) and calcite (CaCO 3 ) minerals using sodium dodecyl sulfonate as collector were carried out using a factorial experimental design 2 3 . The independent experimental variables included celestite grade in the feed (50% and 90% SrSO 4 ), conditioning pH (6.5 and 9) and sodium silicate depressant concentration (10 −5 and 10 −3 M). All experiments were performed at a constant collector concentration (10 −4 M) and conditioning time of 15 min. The response variables were recovery and grade of SrSO 4 in the concentrate. The factors that had the greatest effect on the grade and recovery of celestite were the celestite grade in the feed (L) and the depressant concentration (C); also the combination of these factors significantly affected the response variables. The highest celestite yield (96% recovery, 98% grade) was obtained when a 90% of celestite grade in the feed was used.

Published
2003
Full Text
View/download PDF

13. Effect of collection zone height and operating variables on recovery of overload flotation columns

Author

R.Pérez Garibay, P.M. Gallegos A, A. Uribe S, and F. Nava A

Subjects
Buoyancy, Chemistry, Mechanical Engineering, Bubble, Pulp (paper), Mineralogy, General Chemistry, Operating variables, engineering.material, Geotechnical Engineering and Engineering Geology, Tailings, Control and Systems Engineering, Slurry, engineering, Froth flotation
Abstract

This paper presents results of column flotation of silica sand ( d 80 =190 μm ) that show typical column heights may adversely affect the performance of the flotation, when relatively dense flotation slurries of floatable mineral are processed. For slurry densities above 20% of solids (w/w), floated under typical conditions ( J g =1.46 cm / s , J t =1 cm / s , J ww =0.16 cm / s , h f =0.3 m ), the bubble–particle aggregate reaches density values close to one losing their buoyancy. Under these conditions, mineralized bubbles accumulate, coalesce (losing a fraction of the particles that transport) and may even be carried out to the tailings discharge, affecting both the recovery and the processing capacity of the column. By reducing the height of the collection zone of the column (hc) this abnormal operation may be substantially mitigated. In this work, recovery increased from 55% to 78% by decreasing hc from 4 to 1.5 m when processing a pulp with 30% of floatable minerals. The paper also discusses the effect of column height upon other important variables.

Published
2002
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results