| 摘要 |
PROBLEM TO BE SOLVED: To obtain an external heating rotary kiln installed such that a rotary retort penetrates a heating chamber substantially horizontally in which a matter to be heated can be peeled off from the inner surface of a retort immediately upon adhesion thereto by containing a heat resistant rod-like material movably in the retort. SOLUTION: A furnace body 1 is internally partitioned into an upper heating chamber 4 and a lower flue 6 by means of a furnace bed 2. A retort 8 is disposed in the heating chamber 4 while penetrating it and rings 9 secured to the projecting end on the opposite sides are supported by a pair of rollers so that the retort 8 can be rotary driven. Six spaces are defined on the inner circumference of the retort 8 by a center large diameter ring 14 in the longitudinal direction, by a small diameter ring 15 in the radial direction, and by a stirring plate 11 in the circumferential direction and a rod-like material 17 made of a heat resistant material is contained movably in each space. According to the structure, a matter to be heated adhering to the inner surface of the retort can be peeled off and since the matter can flow smoothly, it can be heat treated uniformly and efficiently.
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