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A novel water purification system that uses a continuous superconducting magnet in filtering phytoplankton has been designed and constructed. The system incorporates a twin-type superconducting magnet with a helium cooler, a reciprocating main magnetic filter and a rotating magnetic sub-filter. The reciprocating and rotating assemblies allow the magnetic filters to alternate between filtration and the backwashing cycle. The system was able to remove more than 93% of phytoplankton from lake water at flow rates of 400 cubic meter per day.

This paper describes the open gradient drum type magnetic separator with superconducting magnet system to develop technologies for dry separation of low magnetic mineral raw material of 4-0 mm (medium size) up to 25-0 mm (coarse size). The separation zone is 1200 mm x 50 mm with the magnet system-wrap angle equal to 90 [degrees], the magnetic field in the separation zone is at the level of 4.5 T, the average value of the magnetic forces is 120 [T.sup.2]/m and the capacity is about 100 t/h. The results of the optimization and numerical calculations of thermophysicai processes in magnetic and cryogenic systems are given. The technological developments of the design of some separator units are presented. The paper also presents the techno-economic indices of the separator application at the ore-mining operations.