Patent ID: 8475707

Claim:
A reduction firing apparatus, which is a dual-chamber stepping reduction furnace, including: a left chamber ( 11 ) having a feeding side and a discharging side, each having a furnace gate ( 3 ); a right chamber ( 12 ) having a feeding side and a discharging side, each having a furnace gate ( 3 ); a material containing device ( 7 ) for containing material and gaps are formed in the bottom thereof; a step mechanism ( 5 ) for carrying and sending the material containing device ( 7 ) so as to make the material containing device ( 7 ) move forward step by step in the chamber; a slag distributing device ( 10 ) disposed at the feeding sides of the left and right chambers ( 11 , 12 ); a charging device ( 9 ) disposed at the feeding sides of the left and right chambers ( 11 , 12 ) and positioned behind the slag distribution ( 10 ) in a lengthwise direction of the chamber; heating burners ( 6 ) disposed on the left and right chambers ( 11 , 12 ); a fume extraction path ( 4 ) disposed at the bottoms of the left and right chambers ( 11 , 12 ) and communicating with the left and right chambers ( 11 , 12 ) through the gaps formed at the bottoms of the material containing device ( 7 ); a discharging device ( 1 ) disposed outside of the furnace gates ( 3 ) of the discharging sides of the left and right chambers ( 11 , 12 ); a material receiving tank ( 2 ) with a sealing cap, which is disposed outside of the furnace gates ( 3 ) of the discharging sides of the left and right chambers ( 11 , 12 ); and a slag discharging path ( 8 ) disposed at a lower portion of the feeding sides of the left and right chambers ( 11 , 12 ) corresponding to the slag distributing device ( 10 ) and the charging device ( 9 ) thereabove.