Abstract
The key problems and causes of recovery and Utilization of sintering waste heat were analyzed firstly, on the basis of sintering and cooling integration , the method and technique of grade recovery and cascade utilization (GRUC) was put forward according to the first and second laws of thermodynamics. The waste heat was recovered in grades according to the quality firstly, and then different qualities of residual heat recovered were utilized in cascades. The higher temperature part of sinter cooling waste gas was used for power recovery, the medium temperature part was used for direct thermal utilizations, such as drying and preheating of sinter mixture, combustion supporting for ignition, hot air sintering and so on, and the lower temperature part was used for absorption refrigeration. Last, a 360m2 sintering machine of JTC was put forward as an example to validate economic feasibility of the process.
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