This machine is the main equipment in mineral dressing plants, used to grade solid particle of different density and speed in liquids. With grinders, it can form a closed circuit, which is used to do the pre-grading and check grading, and granule declining and dehydrating in ore washing. It’s divided to single spiral and double spirals; according the difference of spiral’s depth in overflow surface, it’s divided to high weir type and sinking type.
Check the bolt of each component before using, make clear its degree of tightness, lift the screw shaft, run under zero load, shift the lifting handle, drop down slowly, make the deposit in sink active, finally work, and then the bearing shafts in both axle heads shall be filled up with grease oil regularly.