分析了钢铁熔渣显热回收的技术难点，因为硅酸盐类炉渣导热系数低而处理温度高，所以换热效果难以保证。介绍了连铸连轧法、滚筒法、搅拌法、风淬法、Merotec法等各种熔渣干式粒化物理法显热回收工艺和气体重整、煤气化、直接生产产品等化学法显热回收的技术方案。指出效率不高是各种物理法热回收工艺不能工业化的原因。熔渣显热回收技术对中国钢铁工业的节能降耗很有意义。经过分析，离心粒化和化学法回收热能很有发展前途。
The difficulties of molten metallurgical slag (including blast furnace slag and steel slag, etc) heat recovery caused by low thermal conductivity and high enthalpy are analyzed. The processes of molten slag dry granulation combined heat recovery by physical means, such as slag continuous casting, rotary drum granulation, stirring granulation, air blast granulation and Merotec process, were expatiated. The technology of sensible heat recovery by chemical reactions, such as gas reforming, coal gasification and producing products from molten slag directly, were introduced. It is found that the bottleneck of heat recovery by physical means is the low exergy efficiency. Because of the high energy consumption of China steel industry, this kind of technology is of importance to China. The prospects of slag dry granulation and heat recovery technology were predicted: among dry granulation technologies, centrifugal granulation (rotary cup atomizer) is much simple and more efficient; among heat recovery technologies, recovery by chemical reaction is promising due to its low exergy losses.
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