Vacuum filter is widely used in ore-processing, metallurgical industry, chemical plant, paper industry and etc, for dewatering floatation concentrates of non ferrous metals (such as copper, zinc, lead, nickel and etc,) and concentrates of non metal (such as sulphur, phosphorus, talcum, fluorite, coal and etc,) and can also be used for separating liquid and soild in suspensoids which are not easy to be setted down.

Structure: This kind of equipment is mainly composed of drum, trough, distribution head, blender, and transmission device.

Working Principle: During the operation of the filter, the slurry is fed into the trough. At this time, the slurry in the trough remains suspended as the result of the stirring of the blender. When the disc rotates, due to the vacuum in the vacuum filter, the solid materials are sucked from the slurry to the surface of the excircle of this drum submerged in the tank containing slurry. When the surface of the filter is exposed to vacuum, filter residual formation belt and dewatering belt are always retained. At this time, materials sticking to it begin to be sucked dry. When the drum continues to rotate, filter residual scraping belt appears. Here the vacuum inside the drum changes into compressed air. It blows down the filter residual and blow off through the filtration hole of filter cloth. To remove the filter residual on the filtering surface, a kind of special scraper shall be installed. Before slurry is reinfused to the surface of the drum, the surface of the filter is again affected by vacuum.
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