Study of Different Chemical Process Flotation Units in De-Inking of Paper

Advancements in Flotation De-inking for Environmentally Benign Paper Recycling

Abstract

Flotation de-inking is a complex separation process of inks and other contaminants from Rbres. Due to economic reasons and strict environmental regulations, new materials used by paper manufacturers and new printing technologies, paper mills require environmentally benign de-inking technologies which can easily Rt into the current de-inking system without extra capital investment. In recent years, great progress has been made in Sotation de-inking technologies with respect to Sotation cell design, utilization of new surfactants and the understanding of de-inking chemistry. However, the rapid advances in printing, coating and other modiRcations of paper make de-inking more difRcult. More effort is needed to understand the Sotation behaviour of new types of waste papers. Flotation chemistry plays the most important role in determining the ink removal efRciency.