DEVICE AND METHOD FOR MINERAL SLURRY PRECIPITATION Russian patent published in 2008 - IPC C02F1/52 B01D21/06 B01D21/24 

FIELD: industrial sewage water purification.

SUBSTANCE: precipitation device for mineral slurry decantation comprises tank 11 for concentrated slurry, namely lower layer 15, and clarified liquid, namely upper layer 16, creation. Tank 11 has side wall 34, lower wall 36 made as reversed cone, upper part 14, central vertical axis 30, concentrated slurry outlet 18 made in lower wall of the tank, clarified liquid outlet 19 arranged near upper part 14 of tank 11 and slurry inlet means 12. Means 12 comprises orifice 12C adapted for fresh slurry mixing with that filled in tank 11. Tank also has stirring means 20 with vertical axis 30 of stirring means rotation or reciprocation. Orifice 12C is shifted in transversal direction towards vertical axis 30 of stirring means. Device 12 is shaped so that fresh slurry flow enters slurry volume contained in tank without solid particle separation from fresh slurry directly in front of slurry orifice.

EFFECT: decreased amount of undesirable solid precipitations, possibility to retard hazardous solid precipitations in precipitation devices.

15 cl, 3 dwg