... enterprises heat supply and power projects. 3 feeder machine is to make coal from the coal bunker ... by rack, backplane ( the coal chute), transmission platform, hopper gates, rollers, etc. 5 the feeder can be ... into two kinds ,one is with hopper ,the other is without hopper according to needs 6 Two structure ... content250350400500700Above 10% content200300350450550 K-3 Reciprocating feeder machine