| 摘要 |
FIELD: mining.SUBSTANCE: invention relates to flotation refining of minerals and can be used in coal industry, ferrous and nonferrous metallurgy at refining plants, as well as in refining of non-metallic material. Pneumatic flotation machine of airlift type includes a loading device, a chamber divided into two compartments, inclined foam chute, unloading device and aerator positioned in the bottom part of the chamber. Chamber is a container with rectangular cross-section, wherein its vertical sidewalls are parallel to each other, and parts of front and rear walls have an inclination towards foam chute. Inclined part of the front wall begins at chamber bottom and ends at the level of loading window, and rear wall incline begins above the level of loading window. Chamber is separated into a transport zone and zone of flotation by inclined composite partition consisting of three parts. Upper fixed part of the partition is arranged in parallel to the inclined part of the rear wall, and top edge of this part of the partition is arranged at the level of foam chute threshold. Lower fixed part of composite partition is parallel to the vertical part of the rear wall, Upper edge of the lower part of the partition is arranged at the level of the lower part of loading window, and lower edge of this partition is arranged with clearance above chamber bottom. Upper edge of the middle rotating part of partition is pivotally connected to the lower edge of the upper part of composite partition, and lower edge of the middle part of the partition is arranged at the level of the lower part of loading window. Chamber is additionally equipped with two grids arranged in the area of flotation. Lower grid is fixed at the level of upper edge of lower part of composite partition, upper grid is two-row and is fixed at the movement mechanism with possibility to move in the area of flotation. In upper part of the machine, in its foam layer, with clearance relative to upper wall of the chamber additional fixed partition is installed, lower edge of which is located below the threshold of foam chute, and in foam layer of the machine a gate is installed with possibility of vertical movement interfaced with upper part of fixed partition.EFFECT: technical result - increase of flotation efficiency by increasing extraction of useful component to concentrate.1 cl, 3 dwg |
