Study on High Temperature Composite Adhesive Mechanism of Dust Cold Consolidation Pellet

The cold consolidation pellets were made by bag ash,electric furnace ash,coke powder and cement,and the high temperature self-reduction experiment was carried out on the pellet.Pure cement samples had been used for differential thermal experiments.Finally,the self-reduction experiment was carried out on the cold consolidation pellet made of pure solid iron oxide,graphite powder and pure alumina powder without adding binder.The mechanism of high temperature composite bonding of dust and cold consolidation pellets was analyzed by detecting the compressive strength,scanning electron microscopy and energy spectrum analysis.The results show that the strength of the cold consolidation pellets at low temperature is mainly determined by the cement.With the temperature increasing,the cement gradually failed,after 1000 ℃ in the metal iron began form,and become the main binder phase. Unmelted slag material has a negative impact on the formation of metal iron crystal,when its content excessing 15% it will have a significant impact on the formation of crystal.