Abstract
Over the years, uncontrolled exploitation of bentonite clays in Boa Vista - PB has resulted in the exhaustion fat clay varieties. Bentonites with a high percentage of residual minerals - contaminants such as quartz - which negatively influence the rheological properties of the dispersions are the current norm. In order to obtain samples with rheological values that meet Petrobras standard EP-1EP-00011-A, this study recommends concentrating dispersions of the less fatty clays through a hydrocycloning, kiln and spray drying operation. Thus, prepared dispersions of two compositions of Bofe, Chocolate, Verde-Lodo and Chocobofe clays, with 4wt.% concentrations, were selected by experimental design to be concentrated through hydrocycloning. The concentrates were kiln and spray dried in two drying configurations. The results proved the efficacy of hydrocycloning and spray drying operations on these mixtures, with remarkable improvements in the rheological properties. Also, there was an increase in the quartz fraction in all wastes and a decrease in the clay mineral concentrates.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
