| 摘要 |
PROBLEM TO BE SOLVED: To provide a vertical furnace capable of burning not only coarse raw core but also fine raw ore.SOLUTION: A vertical furnace comprises a coarse grain raw ore supply pipe 2A and a fine grain raw ore supply pipe 2B. An inner cylindrical wall 4A with its lower end being extended in a vertical direction up to an intermediate position between a top plate and an incinerator floor is arranged above the incinerator floor 6 and at a radial inner position from a cylindrical wall 4, preheating space is divided into an inner circumferential space P and an outer circumferential space Q by the inner cylindrical wall in a radial direction, the coarse raw ore supply pipe is opened to the inner circumferential space, and the fine raw ore supply pipe is opened to the outer circumferential space. In addition, raw ore supply amount adjusters 31A, 31B are fixed to at least one of the coarse raw ore supply pipe and the fine raw ore supply pipe, a temperature sensor is arranged in at least one of the inner circumferential space and the outer circumferential space. When detected temperatures at the temperature sensors 32A, 32B are out of a specified temperature range, the raw ore supply amount adjuster device is adjusted to adjust the raw ore supply amount and then the detected temperatures can be set in a specified temperature range. |
