Assertion: lignite's content | /r/HasProperty | controlled
Facets:
value: closely
type: DEGREE
Source sentences:
text: Thereafter the remaining hearths in the furnace if more than three hearths are utilized are temperature controlled in the range of approximately 900° to 1250° F to control and drive off a predetermined portion of the volatiles in the lignite so that the volatile content of the lignite is closely controlled resulting in a predetermined final specification char being produced in the multi-hearth furnace.