Method of operation of reducing rotary hearth furnace and reducing rotary hearth furnace facility

摘要

The present invention provides a method of operation of reducing rotary furnace wherein a combustion exhaust gas is cooled in an gas treatment apparatus provided with at least a preheating type heat exchanger preheating air by heat exchanging, said method characterized in that the total number of moles A of zinc and lead, the total number of moles B of sodium and potassium, and the total number of moles of C of chlorine and flurorine contained in the dust of the combustion gas generated inside satisfy the relationship of (C-B)/A<0.36.