Figure 10: Water recovery from overflow hydrocyclones with technology HRT In the figure 10, the water recovery from overflow hydrocyclones to reach up to 86%, however its necessary to optimize the dosage and type of flocculant for increase the solids percentage in underflow above 45%. Discussions - Regarding the solids content in Campaign 1, the Pilot Plant was fed with 68% solids by weight feed. A dilution of 14.9 m³/h of water resulted in a solids content of 51.6%, achieving a mass recovery of 90.3% and a metallurgical moisture content of 20%. - Regarding the solids content in Campaign 2, the Pilot Plant was fed with 68.5% solids feed. A dilution of 15.6 m³/h of water resulted in a solids content of 51.0%, achieving a mass recovery of 90.1% and a metallurgical moisture content of 20.2%. - The proof of concept was validated due to a greater than threefold increase in permeability in the clean sands from the Pilot Plant. - The cleaned sands had a permeability more than three times that of the original sands. It has been confirmed due to the removal of ultrafine particles smaller than 20 microns (65.7% and 68.7% in campaigns 1 and 2, respectively). - Mass recovery reaches values of 90.3% and 90.1% in the first and second campaigns, respectively. - The metallurgical moisture content in the product from the Pilot Plant in the first campaign was approximately 20%. Due to a higher permeability rate, this geotechnical moisture content decreased to 15% in one hour, then to 5.7% in two hours, and 1.7% in three hours.
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