Experimental Research on Pellet Production with Boron-Containing Concentrate

In this paper, the basic performance of boron-containing concentrate and the method of pellet production with boron-containing concentrate was studied. Research results show that the granularity of boron-containing concentrate was finer; it had a good performance in pelletizing, and the green ball ballability index was at a higher level. If the boron-containing concentrate was heated, there was an obvious endothermic reaction between 550 and 700 ℃. This phenomenon had a negative effect on the compressive strength of preheated pellet. So the preheating temperature and preheating time of pellet should be increased in order to reduce the ring forming phenomenon of rotary kiln. The compressive strength of boron-bearing pellet decreased with the increase of the proportion of boron-bearing ore powder; the appropriate roasting system should be selected according to the proportion of boron-bearing concentrate. The metallurgical properties of boron-bearing pellets were similar to those of ordinary acid pellets.