Relationship between the maturing time of polymeric flocculants and the stability of flocks in the dewatering process
Optimum flocculation in the preparation of coal can only be achieved if the results of basic research are applicable to commercial-scale operation. The experimental equipment and analysis routines devised in the course of this project closely reflect commercial operating conditions. The main project tasks were: (i) long-duration testing of a washing-water thickener, in order to establish an initial data set; (ii) a parameter study of flocculation; (iii) investigation into the influence of flow conditions; (iv) investigation into the influence of combined flocculation with anionic and cationic flocculants on sedimentation and filtration. The conditions were created for carrying out laboratory-scale flocculation followed by sedimentation or filtration under defined conditions. With the equipment and measurement techniques used it was possible to identify a number of ways in which commercial-scale flocculation can be made more effective. The results form a basis for optimising commercial-scale flocculation conditions.
Bibliographic Reference: EUR 14621 DE (1993) 75 pp., MF, ECU 4
Record Number: 199310987 / Last updated on: 1994-11-29
Original language: de
Available languages: de