Separating The Work From The Compound

During the pulling of the heat, the pots are dumped upon a cast-iron

screen which forms a table or apron for the furnace. Directly beneath

this table is located one of the steel conveyor carts, shown in Fig.

43, which is provided with two wheels at the rear and a dolly clevis

at the front, which allows it to be hauled away from beneath the

furnace apron while filled with red-hot compound. A steel cover is

provided for each box, and the material is allowed to cool without

losing much of the evolved gases which are still being thrown off

by the compound.

As this compound comes from the carburizing pots it contains bits

of fireclay which represent a part of the luting used for sealing,

and there may be small parts of work or bits of fused material

in it as well. After cooling, the compound is very dusty and

disagreeable to handle, and, before it can be used again, must be

sifted, cleaned and blended.

Some time ago the writer was confronted with this proposition for

one of the largest consumers of carburizing compound in the world,

and the problem was handled in the following manner: The cooled

compound was dumped from the cooling cars and sprinkled with a

low-grade oil which served the dual purposes of settling the dust

and adding a certain percentage of valuable hydrocarbon to the

compound. In Fig. 44 is shown the machine that was designed to do

the cleaning and blending.

S A E Heat Treatments Short Method Of Treatment facebooktwittergoogle_plusredditpinterestlinkedinmail