subject: An Introduction To Two Types Of Flotation Machine [print this page] The working principles of the mechanical and air sell-priming flotation machine (including the impeller and stick wheeled flotation machine) are primarily the same: utilizing the negative pressure produced by the impeller or stick wheel during their rotation, inhaling air via the quill shaft and then diffusing to bubbles. Depending on the violent stirring and projection, the air bubbles are fully mixed with the ore pulp.
Flotation machine is applicable for the separation of nonferrous metal and ferrous metal and nonmetal, such as fluorite and talc.
The impeller is driven by V-belts, which can bring the centrifugal effect to form the negative pressure. On the one hand, to inhale sufficient air to mix with ore pulp; on the other hand, to stir ore pulp and mix with medication to form the mineralized froth. To adjust the height of flashboard to control the liquid level and make the useful froth scraped by loam board.
After liberation, from 20 century to the mid-1950s, China has successively developed dozens of flotation machines since copying the Michalis Noble flotation machine from the Soviet Union. They can be counted from mechanical flotation machine to inflatable mechanical flotation machine, from small type flotation machine to large-scale flotation machine, from coarse-grained sorting flotation machine to fine-grained sorting flotation machine, from common flotation machine to specialized flotation machine.
Characteristics of flotation cell
1.Large inspiratory capacity and low power consumption.
2.Each cell of the flotation cell has triple functions of inspiratory, midge and flotation, forming flotation circuit by its own, without any auxiliary equipment. Horizontal configuration, easy to change the process.
3.Slurry circulates reasonably, which can minimize grit sedimentation.
4.Slutty surface has self-control device, and easy to adjust.
5.Impeller is with backward curved upper and lower blades. The upper blade produces upper pulp cycle, and the lower blade produces the lower pulp cycle.
The chief difference between the impeller flotation machine and stick wheeled flotation machine basically lies in the inflatable equipment: the inflatable equipment of the impeller flotation machine is comprised of the impeller and the hydraulic cover (known as stator). Besides, the guide blade on the hydraulic cover is similar to the director of the centrifuge. Compared with the no-guide blade flotation machine, it increases the inspiratory capacity without additional electricity consumption. Moreover, the amount of the air flowing into the machine is related with the negative pressure created by the inbetween of the impeller and the stator. The negative pressure reaches its summit when the clearance between the impeller and the stator maintains from 6 to 10 mm. in order to control the amount of the inhalation, one can control the screw rod 9 to change the size of circulation port 8 so as to regulate the circulating ore pulp volume. Normally, the aeration quantity is maximal when the volume is one to two times the original volume.
The aeration equipment of the stick wheeled flotation machine consists of the oblique rod mill and boss. Due to its features, when rotating, the linear speed of the oblique rod mill becomes higher the lower of it, and this causes a rather violent stirring.
