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A CHEMICAL STUDY OF THE ABSORPTION OF SULPHUR DIOXIDE FROM KILN GASES BY CERAMIC WARE 1
Author(s) -
Jackson Frederick G.
Publication year - 1926
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1926.tb17144.x
Subject(s) - kiln , sulfur , coal , flue gas , sulfur dioxide , chemistry , mineralogy , waste management , metallurgy , materials science , inorganic chemistry , engineering , organic chemistry
Two clays rich in scum‐forming bases are studied. One is practically free from sulphur, the other heavily charged with it. Draw trials of these clays are taken from laboratory and commercial kilns at suitable temperature intervals. Commercial firings typify minimum, average and extreme sulphur exposure in coal‐fired kilns. Laboratory firings are in imitation of them. The draw trials are analyzed for water‐soluble sulphates and bases and the percentages of the appropriate sulphates are presented in the form of tables. Comparisons of results show that the temperature attained has much more influence on the amount of sulphates formed in the ware than concentration, or time of sulphur exposure. Calculations show that even under the most favorable firing conditions, with 0.5% sulphur coal on a 64‐hour schedule of firing, twelve times as much sulphur is available as is actually absorbed. Even under the most severe conditions the concentration of sulphur gases from the coal in the kiln gases is so small, (1%), and the maximum evolution of sulphur gases from the ware is such a small fraction (2.6%) of the volume of kiln gases, that the effect of the former in retarding the formation of the latter according to the Law of Mass Action, must be unnoticeable. It is, therefore, futile to try to avoid sulphate formation with coal as a fuel by seeking a coal low in sulphur. The method of study used is recommended for intensive investigation of firing conditions with the object of attaining maximum economies.