Multilevel adverse current contact iron ore reverse flotation process and equipment

Abstract

The invention relates to a multistage countercurrent contact-type iron ore reverse floatation process and equipment thereof. Evenly mixed ore slurry is introduced into a feeding groove of a feeding distributor; the ore slurry distributed through the distributor enters a gas-liquid countercurrent contact-type reverse floatation tower and is sorted; gas phase needed by floatation enters a gas phase distributor; the gas phase distributor is prepared from a porous medium; gas is dispersed into microbubbles through the porous medium; the microbubbles move upwards; a concentrated ore product obtained through the sorting of the reverse floatation tower flows out from a concentrated ore outlet of the bottom of the tower; gas-liquid bubbles carrying part of the concentrated ore product flow upwards and enter the upper layer of the floatation tower through the feeding distributor; washing liquid passes through a washing liquid feeding distributor and enters the floatation tower; the gas-liquid bubbles are subjected to multistage washing, are reclaimed with the concentrated ore product, enter a bubble collecting tank and are discharged from a tail ore outlet. A multistage countercurrent type contact structure can provide larger height of a floatation region, can better meet the requirement of large-batch processing and simultaneously has wide practicability because of simple structure, low manufacturing cost and good floatation effect.

Description

technical field [0001] The invention relates to iron ore reverse flotation process and equipment, in particular to a multistage countercurrent contact type iron ore reverse flotation process and equipment. Background technique [0002] The traditional mineral processing equipment mainly adopts the impeller mechanical agitation flotation machine. Its main working principle is to add water and necessary chemicals to the ground raw ore to make a slurry through the agitation tank, and then inject it into the slurry tank that starts to stir. When the impeller rotates, the impeller cavity Negative pressure is generated in the medium, the air is sucked through the hollow pump tube, and dispersed in the pulp to form bubble groups. Some hydrophobic mineral particles that are not easy to be wetted by water attach to the bubbles and float to the surface of the pulp together with the bubbles to form ore. The mineralized bubble layer, other hydrophilic mineral particles do not attach to ...

AI Technical Summary

Problems solved by technology

However, the investment of flotation machine is high; the floor area is large; the energy consumption is large; the bubble size is not suitable for control; the effective contact area with the pulp is small; the impeller stator and other components are vulnerable; Smaller, lower concentrate recovery

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