Full text of "Metallurgy Of Cast Iron"  Il8
METALLURGY   OF   CAST   IRON. The evils to be expected from
metal possessing much "kish" are mainly in " cold shuts,"
spongy, porous spots in castings, or the separation of the
grains of the metal at places where '4 kish '' is confined. One
might as well try to make a union of oil and water as of kish
and cast ironi Were it possible to collect or skim off all the "
kish " created on top of direct metal, little damage might be
expected; but this is not practical, as the " kish " keeps
rising to the surface as long as the metal is in a fairly fluid
condition. Appliances have been invented with a view to collect
the * ' kish '' in pouring runners, etc., before the metal would
enter the moulds, but these have proven of little value. It may
be said that metal possessing much c<kish" is unfit for pouring
castings. Direct metal free of "kish" can make very good
castings, and for some classes of work might often prove more
desirable than cupola iron,