At present fine-fractin flotation of sylvite ore is carried out together with the main flotation at all the operating technological sections. Fine fractions make up to 25% of all the processed sylvite ore, which amounts to about 240 t/h in the solid residual. For reducing the amount of KCl in the tailings, increasing KCl extraction by 0.5%, increasing the quality of the concentrate and reducing loads on operating technological sections it was decided to organize fine-fraction flotation in a separate section where 50% of the extracted fine fraction could be flotated. The technological section would be based on pneumatic ejector flotation machines IMF-41 (main flotation) and IMF-35 (cleaner flotation). 

Design characteristics:

In accordance with the project aimed at power consumption reduction PASSAT Holding installed flotation machines IMF-41 for the main flotation and IMF-35 for cleaner flotation. Moreover it replaced pumping units, vessels and filters. Old beams were dismantled and new beams and ceilings for supporting the equipment were installed at marks +3,800, +4,950, +5,600, +9,000, +9,950, +10,700, +13,550, +25,000.

Normative construction term was 9 months in view of double-shift work. Actual construction term made up 6 months.

As a result of the technical upgrading the customer:

 Increased the capacity of flotation from 200 to 230 tons per hour

 Improved the quality of the concentrate

 Reduced losses with the tailings

 Reduced expenses on technical maintenance of the machines

 Reduced production areas twice.