Fusion mixer for processing high-viscosity materials

The invention provides a fusion mixer for processing high-viscosity materials. According to the fusion mixer, the main body is a mixer barrel body; an inner cylinder and an outer cylinder are in connection for forming a whole by using an annular semicircular pipe and round steel or a thick-walled pipe, the whole is used as an inner jacket, and 1-4 inner jackets are put in a fusion mixing container; the wall of the fusion mixing container employs a jacket heating manner or an outer pipe heating manner; the middle part of the fusion mixing container is provided with a stirring paddle, and each of the inner jackets, which is adjacent to the stirring paddle and is enhanced through round steel, is employed as an inner flow-guiding cylinder of the stirring paddle; and a heating medium employs steam, heat-conduction oil or other heating mediums. The equipment is applicable as an urea (or ammonium nitrate) fusion mixer, a first mixing tank or a second mixing tank of a high-tower granulation composite fertilizer appar