Study of Decrement of SiO₂ Content in Sinter

Abstract

The formation of melts which greatly affect the structure and quality of sinter has been studied by interrupted sintering pot tests. On the basis of the experimental results, it is clarified that the SiO₂ content in sinter can be decreased by addition of finely ground quartz.
(1) The melt is mainly formed of fine ore particles which adhere to nucleus of quasi-particles. The melt bonds unmelted coarse ore particles together to produce sinter.
(2) Addition of finely ground quazrt increases silicate melt and decreases calcium ferrite melt.
(3) Addition of quartz ground into less than 1 mm size helps to decrease the SiO₂ content in sinter while maintaining the desired quality and production rate of sinter.