国产高清av在线免费观看一区二区,无码成人AV片在线在线播放,东京无码熟妇人妻AV在线网址久久人人做人人妻人人玩精品Au_,一区二区狠狠色丁香久久婷婷,国产精品欧美一区二区三区不卡99久久国产综合精品五月天喷水,亚洲人成色777777精品,色香欲影天天影视综合网八点,亚洲AV成人无码久久精品

As we all know, in the process of glass melting, oxides, carbonates, nitrates, etc. put into the glass materials form silicates and a large number of gases in the process of high-temperature chemical reaction: CO, CO2, SO2, NO2, O2, H2O and other gases.

The weight of this part of gas accounts for about 18% ~ 20% of the weight of the glass material. In this large amount of gas emissions, some of the gas will stay in the glass liquid due to its small volume and proportion. When the temperature of the glass liquid drops, the viscosity of the glass liquid increases, and the gas is more difficult to overflow the liquid surface, and the small bubbles formed in the glass need to be defoaming with the glass clarifier to achieve the clarification.