The fracture causes of joining bolt joined between feeder and quill shaft of ball mill are biggish gap between feeder and quill shaft,defective seal cone washed by ore pulp.

The performance of a feeder changed by a sieve shaker for the fluidized-bed aerosol generator was studied.

Vertical-axis spiral feeder(VSF) is one main part of double-helix of biomass pyrolysis liquefaction plant,and screw shaft is the main component of feeder,it is an important factor to feeder to work normally that the intensity of screw shaft meets the standard.