Abstract: By means of High Temperature Melting in situ Observing and record System(HTMOS), the effects of multi-compound fining agent on the generation, growth and elimination of bubbles in soda-lime-silica flat glass melt are explored.The results are that by means of HTMOS device,cascade fining effect is observed in situ after Na2SO4, C and CeO2 are compounded.Compare with the fining agent of Na2SO4 or CeO2 alone, the glass without clarifying agent has more bubbles.The mixed clarifying agent of C+ Na2SO4+CeO2 can reach cascade fining effect and lower the fining temperature, it is conducive to lower the melting temperatures and reduce the melting time.

Key words: fining agent;bubble;compound