PNEUMATIC FLOATATION MACHINE Russian patent published in 1996 - IPC

FIELD: floatation of mineral resources. SUBSTANCE: the machine uses compartment 1 in the form of a contracting chute with an inclined stepped bottom, on whose narrower end froth collector 4 is installed, and branch pipes 2 for outlet of tailings and appliance 3 for pulp loading are installed on its wider end. Appliance 3 has receiving box 10 with lateral adjustable slot 12 and curvilinear pulp-distributing partitions 13 and 14 inside it, and screening surface 15 with the section of slots 16 increasing towards froth collector 4. Compartment 1 is divided by transverse vertical partitions 6 into sections 7. Curvilinear perforated vials 17 directed towards froth collector 4 serve as upper extensions of partitions 6. Sections 7 are successively connected to one another through curvilinear diffusers 19, facing up with their outlet funnels 20. Curvilinear deflectors 23, also directed towards froth collector 4, are installed above funnels 20. Outlets 21 of diffusers 19 are aligned with pneumohydraulic aerators 9, located on the vertical walls of steps 8 of the bottom of compartment 1, and aligned with windows 22 made in the latter, positioned in sections 7 following towards froth collector 4. Aerators 9 are located on the lateral walls of compartment 1 in pairs against each other on the same axis passing above windows 22. Compartment 1 is filled with water with froth. A froth blanket is produced with the aid of aerators 9, and coarse-grained fraction of pulp is delivered onto the blanket from appliance 3 through slot 12. Fine-grained fraction is fed to compartment 1 through baffle 17. Built-up particles together with the froth blanket run over through baffles 17 from one section 7 to another one and get discharged into froth collector 4. Tailings are discharged through appliances 2. Tailings of cleaner-cell operations are ejected into diffusers 14 and directed to the volume of previous section 7, and are subjected to floatation again. EFFECT: enhanced indices of floatation process due to improvement of the aerohydrodynamic conditions and multiplicity of intracompartment cleaner-cell operations. 4 cl, 2 dwg