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Full text of "The Flow Of Gases In Furnaces"

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60

APPLICATION  OF THE LAWS OF  HYDRAULICS

naces laterally, the ports in the wall should have; their sills at the
hearth level, and their height should not exceed /?,/. If, on the
contrary, the waste gases are taken off from a chamber furnace

Fio. 40.

by ports having a sill at a higher level than that of the hearth of
the furnace, the hearth can never be brought up to a high tem-
perature.

As an example of the experiments made to obtain satisfactory

Fiu. 41.

operation, without any realization of the necessary conditions, a
kiln designed for the burning of silica bricks and using regenerative
firing methods is shown (Fig. 40). In order to force the hot
gases to act on the silica brick set on the hearth of the furnace,