At present, the general treatment methods for ore dressing wastewater are usually lime neutral precipitation method and flocculation precipitation method. Lime and precipitated mineral acid commonly used in waste water containing heavy metal ions in wastewater and simultaneously the acid may remove heavy metal ions, precipitate and recovering valuable metals from the slag. The flocculation precipitation method is carried out by adding a flocculant such as FeSO4 and alum to bridge the heavy metal hydroxide particles in a flocculation mode, and form a larger particle to coprecipitate. In order to accelerate the precipitation rate of heavy metal hydroxide and improve the precipitation efficiency, process measures can be taken to strengthen the precipitation process, such as adding a sloping plate and a inclined tube device in the sedimentation tank. The above method can only remove heavy metals in waste water and mineral elements in the solid substance, wastewater treatment is not considered dressing agent should be used in the oxidation, ion exchange, activated carbon adsorption, froth flotation, biochemical, electrodialysis and ferrite Method The method is comprehensively treated to remove the organic flotation agent while removing heavy metal pollution. From the point of view of the beneficiation process and the wastewater treatment method, the most effective measure is to try to recycle the tailings wastewater as much as possible, to achieve zero discharge, reduce the total amount of wastewater, and secondly to carry out purification treatment.
Swing Bearing Also named Swing Circle, Slewing Ring, The slewing bearing of excavator realizes the rotation of the device by the action of friction and lubrication, which can drive the mechanical rotation and provide support capability in excavator.
A slewing bearing or slew[ing] ring is a rotational rolling-element bearing that typically supports a heavy but slow-turning or slow-oscillating load, often a horizontal platform such as a conventional crane, a swing yarder, or the wind-facing platform of a horizontal-axis windmill. (To "slew" means to turn without change of place.)
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