Patent ID: 8088194
Filing Date: 2012-01-03
Classification: C21B,C22B,F27B,F27D

Abstract:
1. A method for producing hot briquette iron by hot-forming high-temperature reduced iron reduced in a reducing furnace, the method comprising a temperature control step of cooling the high-temperature reduced iron and controlling the temperature of the reduced iron to an appropriate hot-forming temperature of over 600° C. and 750° C. or less, and a step of producing hot briquette iron by hot-forming the high-temperature reduced iron at the appropriate hot-forming temperature with a briquetting machine; wherein the temperature control step includes substantially horizontally holding a rotating drum having a feed blade spirally provided on the inner periphery thereof; charging the high-temperature reduced iron in the rotating drum and passing it through the rotating drum by rotating the rotating drum while maintaining the inside of the rotating drum in a non-oxidizing atmosphere with inert gas; and cooling the outer peripheral surface of the rotating drum by contact with a cooling fluid during the passage of the high-temperature reduced iron through the rotating drum to indirectly cool the reduced iron so that the temperature of the reduced iron is the appropriate hot-forming temperature, wherein the temperature of the high-temperature reduced iron is controlled by adjusting at least one of a rotational speed of the rotating drum, a supply flow rate of the inert gas to the rotating drum, and the temperature of the cooling fluid.