This may be due to insufficient material feed with {HEAD ~ automatic charging} of {TAIL ~ a vaporizer}, for example, or to the formation of slag patches on molten evaporation material 
of
This may be due to insufficient material feed with { HEAD ~ automatic charging } of { TAIL ~ a vaporizer } , for example , or to the formation of slag patches on molten evaporation material
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH