. Bulletin - New York State Museum. Science. METHOD OF MANDFAOTUEING BRICK 171 Scove kilns, clamps or down-draft kilns are used for burning the product. The principle of burning is much the same in all three, although many manufacturers claim that the burning can be better regulated in clamps and down-draft kilns, while others claim the opposite. In the latter the bricks in the upper^portion of the kiln receive the greatest amount of heat, whereas^in a. 3 DowB-draft kiln. scove kiln or clamp the arch bricks, which have to bear the weight of the overlying bricks, are heated the most and often b
. Bulletin - New York State Museum. Science. METHOD OF MANDFAOTUEING BRICK 171 Scove kilns, clamps or down-draft kilns are used for burning the product. The principle of burning is much the same in all three, although many manufacturers claim that the burning can be better regulated in clamps and down-draft kilns, while others claim the opposite. In the latter the bricks in the upper^portion of the kiln receive the greatest amount of heat, whereas^in a. 3 DowB-draft kiln. scove kiln or clamp the arch bricks, which have to bear the weight of the overlying bricks, are heated the most and often become crushed out of shape. Regarding the rectangular and circular down-draft kilns, the latter are bound easier than the rectangular ones, this being of course necessary in order to pre- vent a bulging of the walls during burning. Roll crushers.— This type of machine is extensively used in the preparation of tough or stony clays. They consist of two or four steel rolls, which revolve at different velocities. They are usually enclosed and the clay is charged into a hopper above them. The crushed material passing out below is received on a traveling belt and carried to the pug mill. Crushers are objected to by many on the ground that they make the clay flaky, in which condition it does not make a good brick. Subsequent pugging, however, usually does away with this. By many manu- facturers rolls are used as a means of breaking up the stones and thus avoid drying the clay and screening it. There is no. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum; New York State Museum. Albany : New York State Education Dept
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
