This report deals with the results obtained from a study of cement dust collected in Cottrell treaters of rotary kiln and a process of making glass of it invented by K. (Jap. Pat. 98286).
It was found that ignition loss of the dust varies with the temperature and time of heating. Therefore its contents of moisture, combined water, CO
2, SO
3, and Cl were determined independently.
The dust absorbs moisture and carbonic acid from atmosphere. This phenomenon was studied by means of a thermo-balance using a fresh dust and the same dust weathered indoors or outdoors for 40 days.
Then 103 members in the system silica-soda-dust were heated to cone 14 and the result is discussed in comparison to the system silica-soda-lime.
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