A reverse fluidized bubble bed slime flotation machine

Abstract

The invention belongs to the technical field of slime flotation devices, in particular to a reverse fluidized bubble bed slime flotation machine. It includes an upper barrel, a conical lower barrel and a concentrate foam barrel. The concentrate foam barrel is arranged above the upper barrel, the conical lower barrel is arranged below the upper barrel, and the inner top of the upper barrel is provided with an inverted cone The water distribution sieve plate has a plurality of bubble generators evenly arranged outside along the circumferential direction, and the outlet at the bottom of the bubble generator is communicated with the middle and lower part of the upper barrel; a water storage area is formed between the inverted conical water distribution sieve and the upper barrel. A plurality of spray holes are arranged on it; the upper barrel is provided with a water inlet pipe corresponding to the position of the water storage area; a plurality of inclined plate components are stacked inside the conical lower barrel, and a tailings pipe is arranged at the bottom, and the inclined plate The assembly divides the conical lower barrel space into a plurality of annular spaces arranged radially along the cross-section. The invention can work under the condition of high gas velocity, improves the separation efficiency, and also improves the flotation separation precision and concentrate grade.

Description

technical field [0001] The invention belongs to the technical field of slime flotation devices, in particular to a reverse fluidized bubble bed slime flotation machine. Background technique [0002] Froth flotation is a general method for selecting minerals from fine-grained pulp. Jet microbubble flotation column is a commonly used type of flotation equipment, among which Imhoflot inflatable flotation machine from Germany and Jameson CELL from Australia are the most representative. The German Imhoflot inflatable flotation machine adopts the principle of combined multi-nozzle venturi jet aeration. After the slurry is inflated and mineralized, it is fed into the inflatable slurry distributor connected to the bottom of the downcomer. The inflatable slurry distributor is provided with several upward nozzles. An upward gas-solid-liquid three-phase jet is formed in the tank. In the separation tank, the mineralized bubbles and the slurry flow are separated during the upward movemen...

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Problems solved by technology

When the sorting equipment operates under the condition of the bubble surface area flux greater than the limit, it is easy to form a liquid flooding phenomenon, the foam layer is unstable, and the particles fall off from the mineralized bubbles, the concentrate foam carries serious pollution, and a large number of bubbles enter the tailings and lose On the one hand, this limits the improvement of the unit processing capacity of flotation equipment, and on the other hand, it also sharply deteriorates the sorting selectivity of flotation, which has become a technical bottleneck in the development of current flotation equipment.

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