| 摘要 |
According to the present invention, there is provided a microwave generator between the raw material feeding device and the ignition furnace of the Dwight Lloyd type sintering machine. (1) Microwaves alone heat a surface layer of raw material to 120 to 600 DEG C. (2) After the microwaves have heated the surface layer of raw material to 50 to 200 DEG C, a hot blast is sucked and the surface layer of raw material is heated to 150 to 600 DEG C. (3) Microwaves and the hot blast are simultaneously utilized so as to heat the upper layer of raw material to 150 to 600 DEG C. After the heating described in items (1), (2) and (3), the raw material is sintered. Due to the foregoing, the raw material is quickly dried, heated and sintered at high temperatures in a short period of time without the collapse of pseudo particles on the surface layer of raw material to be sintered, and sintered ore of high quality can be obtained. <IMAGE> |
