METHOD FOR ADJUSTING FURNACE TEMPERATURE IN HEATING-COMBUSTION ZONE IN ROTARY-HEARTH FURNACE, AND ROTARY-HEARTH FURNACE

摘要

PROBLEM TO BE SOLVED: To provide a method for adjusting the furnace temperature in a heating-combustion zone in a rotary-hearth furnace and the rotary-hearth furnace with which explosive cracking and brittleness of a material to be treated, in the heating-combustion zone in the rotary-hearth furnace, are prevented and also, the material to be treated can be uniformly heated.;SOLUTION: In the method for adjusting the furnace temperature in the rotary-hearth furnace, in which the material to be treated, charged into the rotary-hearth furnace 1, is heated and reduced at the heating-combustion zone 6 and a reducing-combustion zone 7 to produce a reduction iron; an exhaust gas exhausted from the rotary-hearth furnace, is cooled, and a part of the exhaust gas, removing dust in a dust-collector (temperature: 150-250°C; oxygen concentration: 2-10 vol%), is blown into the heating-combustion zone, to heat the material to be treated at 700-1,100°C.;COPYRIGHT: (C)2010,JPO&INPIT