RU2547537C2 - Flotation pneumatic machine - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention relates to the field of mineral processing, namely to flotation pneumatic devices for processing mineral raw materials containing non-ferrous, ferrous, rare, precious metals and also nonmetallic minerals. The flotation pneumatic machine comprises a housing composed of expanded upper and lower parts, a central pipe located inside the expanded part of the housing, a foam tank, feeding devices in the form of aerators of the upper level of aeration and the aerators of the lower level in the lower part of the housing. Each aerator of the lower level is placed on a vertical guide fixed in the inner surface of the housing with the ability to move and fix the aerator to a predetermined depth of immersion. Opposite each aerator a hatch is made for its maintenance. The vertical guide of each aerator of the lower level is fixed on the inner surface of the access hatch.

EFFECT: increased recovery of a foam product during flotation of various kinds of raw materials.

3 cl, 1 dwg, 1 tbl

Description

The invention relates to the field of mineral processing, in particular to pneumatic flotation devices for processing mineral raw materials containing non-ferrous, ferrous, rare, precious metals, as well as non-metallic minerals.

 Known flotation pneumatic machine, including with located in it aerator foam threshold, loading device in the form of a pipe with holes. The machine is equipped with a circulation pipe connected with the pipe with holes, the free end of which is located at a distance from the foam threshold and is made with an oblique cut (US Pat. RF No. 2038865, B03D 1/24).

 The disadvantage of this machine is that the increase in the extraction of the useful component in the concentrate is due to the multiple circulation of the feedstock, but thereby reduces the performance of the machine for feedstock.

 The closest in technical essence is a flotation pneumatic column machine, including a casing, consisting of an expanded upper and lower parts, a central cylindrical pipe located in the expanded part of the casing and dividing the upper expanded part of the casing into the main flotation and doflotation chambers, a foam collector made in the form of a gable ring trough and located on the outside of the expanded part of the housing, a feeding device made in the form of aerators of the upper level of aeration and aerato a ditch of the lower level in the lower part of the body, a unloading device, an annular bump, in cross section a triangle, the apex of which is directed to the axis of the machine. The upper expanded part of the body of the known machine consists of two sections interconnected: the upper one in the form of a cylinder and the lower one in the form of a truncated cone, expanding from bottom to top (RF patent No. 2281169, B03D 1/24).

 A disadvantage of the known machine is that the lower level aerators are fixedly (rigidly) attached to the lower part of the housing. Moreover, the optimal immersion depth of the lower level aerators is different for different feedstock and depends on its material and mineral composition and creates the conditions for frequent reinstallation of aerators. This disadvantage leads to a decrease in the recovery of the foam product during the flotation process.

 The technical problem to which the invention is directed is to increase the extraction of the foam product during flotation of various types of feedstock, due to the lower system of multi-level aeration.

 This result is achieved by the fact that in a flotation pneumatic machine, including a housing consisting of an expanded upper part and a lower part, a central pipe located inside the expanded part of the housing, a foam collector, feeding devices, in the form of aerators of the upper level of aeration, lower level aerators in the lower part case, each aerator of the lower level is placed on a vertical guide fixed in the inner surface of the case with the ability to move and fix the aerator to a predetermined depth eniya. Opposite each aerator, a hatch is made for its technological maintenance, and the vertical guide of each lower level aerator can be fixed on the inner surface of the technological hatch. Vertical guides can be installed in the inner surface of the housing on its lower base.

 The invention is illustrated in the drawing, where

 in FIG. 1 shows a General view of the flotation column of a pneumatic machine and its section along AA.

The flotation machine includes a housing 1, consisting of an expanded upper part 2 and a lower part 3, a central pipe 4 located inside the expanded part 2 of the housing 1, a foam collector 5, feeding devices in the form of aerators of the upper level 6 and aerators of the lower level 7 in the lower part of the housing 1 Each aerator of the lower level 7 is placed on a vertical guide 8, mounted on the inner surface of the hatch 9 for technological maintenance with the possibility of moving and fixing the aerator 7 with locking screws.

 Flotation machine operates as follows.

 The pulp pretreated with reagents passes through the upper level aerators 6 to the upper expanded part 2 of the housing 1. At the same time, air enters the upper level aerators 6, which comes into contact with the hydrophobic grains of the pulp, forming aeroflocles. Aeroflocules, emerging, form a foam product. The foam product is unloaded into the foam collector 5 and sent to subsequent operations (not shown in the drawing). Grains with insufficiently hydrophobized surface, as well as hydrophilic grains, are discharged into the lower part 3 of the housing 1, where aerators of the lower level 7 are located on the vertical guides 8, mounted on the inner surface of the hatch 9 for technological maintenance. float into the upper expanded part 2 of the housing 1 and unload in the foam collector 5. The depth of immersion of the lower level aerators 7 is selected experimentally, depending on the technological properties of the source raw materials. The location of the lower level aerators 7 at different depths of immersion relative to each other allows you to create a multi-level aeration system in the lower part 3 of the housing 1. Hydrophilic grains are lowered into the bottom of the housing 1 and are removed through the bottom discharge device (not shown).

 The inventive flotation machine was tested in the main flotation operation of 2 types of copper-containing ore (disseminated and solid pyrites) in comparison with the known operating machine KFM-1400M. The test results are presented in the table.

 The results of the table indicate that the claimed design of the flotation pneumatic machine by optimizing the depth of immersion of the lower level aerators can improve both the quality of the foam product and the extraction of a valuable component into it.

Table Test results No. Name of indicator Flotation machines Declared
(with mobile aerators) KFM-1400M
(with fixed aerators) Easily sintered disseminated copper ore one.
2.
3. Aerator immersion depth, mm
Extraction of copper in the foam product
(from operation),%
The copper content in the foam
product% 3200
85,4
12.15 3650
79.0
11.90 Refractory Solid Pyrite Copper Ore one.
2.
3. Aerator immersion depth, mm
Extraction of copper in the foam product
(from operation),%
The copper content in the foam
product% 3850
81.7
9.21 3650
74.1
8.50

Claims (3)

1. A flotation pneumatic machine, comprising a housing consisting of an expanded upper and lower parts, a central pipe located inside the expanded part of the housing, a foam collector, feeding devices in the form of aerators of the upper level of aeration and lower level aerators in the lower part of the housing, characterized in that each aerator of the lower level is placed on a vertical guide fixed in the inner surface of the body with the ability to move and fix the aerator to a given depth of immersion. 2. The flotation machine according to claim 1, characterized in that in front of each aerator a hatch is made for its technological maintenance. 3. The flotation machine according to claim 1, characterized in that the vertical guide of each lower level aerator is fixed on the inner surface of the technological hatch.

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