| 摘要 |
A method for suspending or re-suspending magnetically attractable particles is provided. In the present method at least a mixing vessel (10) is provided filled at least partially with a mixture (30) containing magnetically attractable particles (40) at least partially precipitated at the bottom (11) of the mixing vessel (10). An effective magnetic field acting at least in the front end area (3) of the mixing bar (1) is switched on by the magnetic field generating apparatus (4) while the mixing bar (1) is immersed in the mixture (30). Subsequently, the magnetic field is moved away from the bottom (11) of the mixing vessel (10) along with the mixing bar, whereby the movement of the magnetic field along with the mixing bar is carried out such that at least a part of the magnetically attractable particles (40) is raised from the bottom (11) of the mixing vessel (10) and the portion of the particles sticking to the bar is minimized. The magnetic field is switched off in a predefined distance from the bottom which is greater than the distance from the bottom at the time when the magnetic field is switched on. Thereafter, repeated mixing movements of the mixing bar (1) are carried out until the magnetically attractable particles present in the mixture (30) are sufficiently suspended or re-suspended whereby a magnetic field which is switched on does not exist at the front end (3) of the mixing bar (1).
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