| J{aolin Refining* |
BY R. V. LELE,
Pages : 74-81
DOI : 10.1080/0371750X.1955.10877676 |
| Abstract |
| Ct·ude china clay contains several different types of
imput·ities such as undecomposed felspar, g1·anite, quartz, mica,
tourmaline, garnet, etc. It is easy to remove the coarser
impurities but for finer impurities a ;)loper refining technique
has to be used. Three qualities of clay are being produoed in
India : (l) textile clay (~) paper clay and ($) rubber clay. The
standards fot· china clay are set by the requirements of textile,
paper and rubber industries which vary from time to time.
There is no standard for pottery quality clay as very little clay
was so far ·used for whiteware manufactule. The importance
of p·roper dilution of clay-water slurry and control over the speed
of flowing mixture is explained. The importance of the removal
of iron and such other staining materials is also discussed and
use of a magnetic separator is suggested. Blending of different
varieties of clay is very necessary to l1ave a uniform qu,ality.
Two simplt control tests are suggestec~ to get a uniform size
refined china clay. |
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