The pellets were manufactured using laboratory pellet mill (L- 175), made by the Amandus Kahl Co. of Hamburg, Germany. The
pellet mill parameters were set to a rotary speed of 235 rpm, press channel of 20.0 mm and pellet diameter of 6.0 mm. Mixture par- ticles were continuously fed into the pellet mill and formed into pellets. The pellets were collected and kept in the laboratory more than a week, and then their properties were tested.