The invention discloses a manufacturing method for a composite cast segment for dry-type
waste heat recovery for
blast furnace slag. The manufacturing method comprises the following steps: a
copper ball is adopted as an inner core of the composite cast segment, and the inner core
copper ball and an outer shell material are enabled to form the composite cast segment in a manner of steel
die casting, ferrite steel is adopted as the outer shell steel material of the composite cast segment, and the volume ratio of the
copper ball to the outer shell material is 1: 4 to 1: 15; and a
casting temperature is 1510 DEG C to 1380 DEG C. The copper core in the composite cast segment has a
high heat conductivity coefficient, and is capable of realizing rapid heat exchange and heat storage after making contact with the liquid-state
blast furnace slag; and the outer ferrite steel is long in service life, and capable of meeting the
continuous use requirement of a dry-type
waste heat recovery process for the
blast furnace slag. Due to the outer steel shell body of the composite cast segment,
recovery and reuse for the cast segment can be realized through a
magnetic separation process. The compositecast segment has an inner-copper and outer-steel structure, and the copper core is high in heat exchange speed, and higher in high-temperature-
impact-resistant capacity. The composite cast segment isproduced through a steel die; the
casting process is low in exhaust process difficulty; and the copper ball wrapped by
molten steel is high in centering degree.