Crystallizer suitable for producing thin-wall ring-shaped blank

The invention discloses a crystallizer suitable for producing a thin-wall ring-shaped blank and relates to the field of thin-wall ring-shaped continuous-casting blanks. An inner crystallizer body is arranged in the middle of the interior of an outer crystallizer body, and the inner crystallizer body is internally provided with an air exhaust passage and is externally provided with an elongated inner crystallizer copper pipe. The lower portion of the inner crystallizer body is provided with an inner crystallizer foot roll, and the outer layer of the inner crystallizer body is provided with theinner crystallizer body copper pipe in a stretchable manner. The inner most layer of the outer crystallizer body is provided with an outer crystallizer copper pipe in a stretchable manner, and the bottom of the outer crystallizer body is provided with a sealing portion. Through the arrangement of the inner crystallizer body and the outer crystallizer body, the inner crystallizer copper pipe and the outer crystallizer copp