BSIN-K #3BB had ignition of the rubber in the hopper of TSR (twin screw roller extruders) on Jan-13th.
This happened because either automatic or manual water pouring was not performed as the rubber was bridging in the hopper during discharging process (residual quantity ≒2.5 ton, 5 batch).
From the equipment side point of view, even rubber detection in a hopper was performed correctly, since extrusion operation was performed intermittently in order to discharge, monitoring of rubber stagnation was reset and the system couldn’t recognize the rubber stagnation.