SU935133A1 - Apparatus for preparing pulp for flotation process - Google Patents

Description

one

The invention relates to the enrichment of minerals, in particular, to the preparation of pulp for the flotation process i, and is intended for use in the coal, mining and other sectors of the industry where the enrichment of materials is carried out by flotation.

A device for preparing pulp prior to flotation by contacting flotation pulp with reagents is known, comprising a cylinder-conical body with feed and discharge nozzles, a coarse fraction density regulator with a flotation agent spray 1.

A disadvantage of this device is the lack of preliminary aeration of the pulp, which greatly increases the efficiency of the flotation process.

A device for preparing the pulp for the flotation process is also known.

comprising a cylinder-conical body with loading and unloading nozzles, a coarse fraction density regulator, a reagent atomizer, an air intake regulator and a tubular perforated aerator G2 coaxial with the body.,

A disadvantage of the known device is that it does not provide effective flotation due to the low degree of pre-aeration.

The goal of the izob shadow is to provide

ts increase the efficiency of the flotation process by increasing the degree of pulp aeration.

The goal is achieved by the fact that the aerator is made in the form of a conical helix.

Claims (2)

In addition, the aerator is equipped with blades mounted on its outer surface. 39 fla drawing shows a structural diagram of the device. The device consists of a housing 1, a cylindrical-conical shape with a tangential nozzle 2, a central nozzle 3 and a drain nozzle 4,: a device 5 for controlling the density of the coarse fraction fixed to the pipe 6 and connected with a lifting mechanism 7, a reagent spray 8, a discharge nozzle 9, adjustable annular opening 10, zone P of the air column of the spiral hollow perforated aerator 12, devices for crushing the air (blades) 13 of the intake pipe 14 and the air intake regulator 15. Hollow perforation This spiral aerator 12 is connected in the upper part with the air intake pipe 14 and the air intake regulator 15. The spiral element 1 is located along the axis of the apparatus and is associated with the air column zone 11 (low pressure zone). The device works as follows. Pulp enters the body 1 through the tangential nozzle 2, while large particles are thrown by centrifugal forces to the wall of the body I and, together with the pulp flow, move down to the discharge nozzle 9, and smaller particles with an internal rotating flow rise and carry to the drain through the central 3 and drain 4 nozzles. An air column is formed along the rotation axis of the flow in} 1, located in zone 11. Intensive air is drawn from the atmosphere through the air intake pipe 14 and the regulator 15. Air is distributed throughout the entire volume of the housing 1. Air bubbles exit through the perforated holes of the spiral aerator 12 and fractions are made with special devices (blades) 13 located on the outer surface of the aerator. Pulp pre-aeration is performed prior to the supply of reagents. By changing the size of the annular hole 10 formed by the walls of the housing 1 and the device 5 for adjusting the density of the coarse fraction, the required density of the coarse fraction is established. Through the pipes 6 and the spray emulsion 8, the reactants enter the pulp and contact over the entire surface of the annular gap 10 with the coarse fraction, which is directed to the discharge port 9. The condensed product and the drain are combined in a mixer-pulver (not shown), where is the transfer of the reagent from the surface of large particles to the surface of small ones. An increase in the degree of preliminary aeration of the pulp intensifies the flotation process and provides an increase in the technological efficiency of the process: an increase in the yield of the flotation concentrate without altering its quality with an increase in the ash content of the waste, a reduction in the flotation time, a decrease in the consumption of apolar reagents, a reduction in the time of contact of the pulp with apolar reagents. Claim 1. Device for preparing pulp for flotation process, containing. a cylinder-conical body with loading and unloading pipes, a coarse fraction density regulator, a reagent sprayer, an air intake regulator and a tubular perforated aerator located coaxially with the body, characterized in that, in order to ensure an increase in flotation efficiency by increasing the level of pulp pre-aeration, , the aerator is made in the form of a conical spiral. 2, The device according to claim 1, about t l and so that the aerator is equipped with blades mounted on its outer surface. Sources of information taken into account during the examination 1. USSR author's certificate No. 492307, cl. 03 D 1/14, 1974. 2. USSR author's certificate in application N 2507432 / 22-03, cl. B 03 D 1/14, 1977 (prototype). f5