Amine flotation: the importance of the water quality

作者：Pinheiro Viviane da Silva; Magalhaes Baltar Carlos Adolpho; Pereira Leite Jose Yvan

来源：Revista Escola de Minas, 2012, 65(4): 549-552.

• Hardness water in flotation
• amine flotation
• quartz flotation
• non-specific adsorption

Amine adsorption is non-specific, occurring due to electrostatic attraction with the surface. So, all cationic species dissolved in water compete with the ion by the negative sites on mineral surface. This shows the importance of water quality for amine flotation. %26lt;br%26gt;A quartz flotation with amine was studied using three different waters: (1) a hard water from Currais Novos (Rio Grande do Norte); (2) water from Currais Novos, after treatment by ion flotation and (3) distilled water. The pH and collector concentration influence were studied. The flotation tests were realized in a Hallimond Tube. %26lt;br%26gt;The results showed that the calcium and magnesium levels found in the hard water are detrimental for amine flotation. The removal of these ions in the treated water enabled a quartz recovery three times higher. Despite residual ions, the results with treated water are similar to those obtained with distilled water, suggesting that, in low concentrations, the Ca++ and Mg++ ions don%26apos;t affect the amine%26apos;s adsorption density on the quartz surface.

• 出版日期2012-12