Pre-flotation high efficiency slurry conditioning device for wide-particle-grade flotation

A pre-flotation high efficiency slurry conditioning device for wide-particle-grade flotation, comprising a slurry conditioning drum including an upper part that is a columnar structure and a lower part that is a funnel-shaped inverted frustum structure, a drum cover is arranged on top of the slurry conditioning drum, the drum cover is provided with a power source and a clean water supplementing port respectively, a dual channel jet circulation chemical feed system is arranged on two sides of the slurry conditioning drum, an ore slurry outlet is arranged above a side wall of the slurry conditioning drum, two ore slurry pump separation openings are arranged at opposing positions on the two sides below the ore slurry outlet, an emergency material discharge port is arranged at the bottom end of the inverted frustum structure, ore slurry jet openings are arranged on two sides of the inverted frustum structure near the emergency material discharge port respectively, annular cutting isolation plates and flow guide plates are arranged in alternation from bottom to top on the inner side of the upper part of the slurry conditioning drum, and valves are arranged in the ore slurry jet openings, wherein,

• the dual channel jet circulation chemical feed system comprises a chemical feed pipe, which is a Venturi pipe for realizing shear jetting of the ore slurry, the Venturi pipe comprises an inlet end, a diffusion end, and a chemical feed pipe opening arranged in a throat area, the chemical feed pipe opening is connected through a pipeline and a valve to a chemical feed tank, the chemical feed tank is provided with a collecting agent feed port and a frothing agent feed port respectively;
• the inlet end of the Venturi pipe is connected to a T-joint via a centrifugal pump, one outlet of the T-joint serves as an ore slurry inlet, and the other outlet of the T-joint is connected to an ore slurry pump separation opening in the side wall of the slurry conditioning drum, and both of the outlets of the T-joint are provided with a valve respectively;
• the diffusion end of the Venturi pipe is connected through pipelines to the ore slurry jet openings, and both the ore slurry pump separation opening and the ore slurry inlet are provided with a valve respectively;
• a mixing shaft is arranged inside the slurry conditioning drum in the axial direction, a top end of the mixing shaft is connected to the power source on the drum cover, a bottom end of the mixing shaft extends to a boundary between the upper part and the lower part of the slurry conditioning drum, a plurality of mixing impellers are provided on the mixing shaft, the bottom-most two mixing impellers and the lowest two annular cutting isolation plates are at the same horizontal level to form a counter-flow forced mixing down-regulation area, which hampers the upward movement of the ore slurry to improve a turbulent dissipation rate of the ore slurry and enhance a down-regulation effect.