Study of Flotation Deinking Efficiency of Old Newspaper and Old Magazine


Article Preview

The effect of flotation parameters such as flotation consistency, temperature, flotation time, air to pulp ratio, velocity of pulp flow (turbulence level), and pH on old newspaper/old magazine deinking efficiency was studied by using a laboratory deinking cell developed by ourselves. The optimized flotation conditions were: flotation consistency 1.2%, 50°C, 6min, air to pulp ratio 50%, velocity of pulp flow 3.5m/s and pH 8.5. By using the optimized flotation conditions, the deinked pulp brightness could reach 59.15%ISO, 10.18%ISO higher than that of the control, the effective residual ink concentration was 234.65 mg/kg, which less heavily than 875.56 mg/kg of the control, theoretical deinking efficiency was up to 84.42%.



Advanced Materials Research (Volumes 295-297)

Edited by:

Pengcheng Wang, Liqun Ai, Yungang Li, Xiaoming Sang and Jinglong Bu




R. G. Li et al., "Study of Flotation Deinking Efficiency of Old Newspaper and Old Magazine", Advanced Materials Research, Vols. 295-297, pp. 2205-2209, 2011

Online since:

July 2011




[1] Altaf H B; Zhan H Y; Wang S F et al. Cleaning Efficiency of a Deinking Line. Transactions of China Pulp and Paper, 2002, 17(1), 55-59.

[2] Francois J; Saint A. Hydrodynamics of Deinking Flotation. International Journal of Mineral Progressing, 1999, 56(1), 277-316.