Manufacturing Of Bricks
Tempering:
Tempering: Tempering consists of kneading
the earth with feet so as to make the mass stiff and plastics (by
plasticity, we mean the property which wet clay has of being permanently
deformed without cracking). It should preferably be carried out by storing the
soil in a cool place in layers of about 30 cm thickness for not less than 36
hours. This will ensure homogeneity in the mass
of clay for subsequent processing. For
manufacturing good brick, tempering is done in pug mills and the operation is
called pugging.
Pug mill
consists of a conical iron tube as shown in Fig. 6. The mill is sunk 60 cm into
the earth. A vertical shaft, with a number of horizontal arms fitted with
knives, is provided at the centre of the tube. This central shaft is rotated
with the help of bullocks yoked at the end of long arms. However, steam, diesel
or electric power may be used for this purpose. Blended earth along with
required water, is fed into the pug mill from the top. The knives cut through
the clay and break all the clods or lump-clays when the shaft rotates. The
thoroughly pugged clay is then taken out from opening provided in the side near
the bottom. The yield from a pug mill is about 1500 bricks.
Related Topics
Privacy Policy, Terms and Conditions, DMCA Policy and Compliant
Copyright © 2018-2024 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.