Redox Conditions During The Melting Of Batch

During the melting down of glass batches a variety of gases are set free. The redox conditions of the melt can be influenced by these gases, because both the gases and the melt are at the same time in a temperature range of 200K. For the quantification of this influence batches with different charges of coal were heated in comparision with a batch without additions of coal. With the continuous measurement of the oxygen partial pressure and the content of CO in the gas the effect of coal on the reactions of gases during the heating of batches can be described.