Slag waste heat recovery device

The utility model relates to a slag waste heat recovery device in the technical field of metallurgical slag treatment, which comprises a slag fragmentation conveying line, the top of the slag fragmentation conveying line is covered with a membrane wall, and a heat radiation cavity is formed between the inner side of the membrane wall and the top surface of the slag fragmentation conveying line; according to the utility model, the membrane wall is adopted to directly absorb the radiant heat of the slag, so that the heat exchange efficiency is high; and meanwhile, air convection heat exchange is assisted, high-temperature air is recycled, and low-temperature heat of the molten slag is fully recycled. 本实用新型涉及冶金熔渣处理的技术领域的一种熔渣余热回收装置，包括熔渣碎化输送线，所述熔渣碎化输送线的顶部罩设有膜氏壁，且所述膜氏壁内侧与所述熔渣碎化输送线顶面之间形成辐热腔；还包括循环换热水路以及循环换热气路，本实用新型采用膜氏壁直接吸收熔渣的辐射热，换热效率高；同时辅以空气对流换热、高温空气循环使用，充分回收熔渣低温位热。