Abstract:
All the cement raw materials contain constituents other than the main
constituent. Sometime these unwanted minerals or impurities cause problems
in cement manufacturing process. They cause negative effect on the reaction
take place inside the kiln.
The clinker production rates have been reduced in August and
September of year 2004, due to affect of those impurities of raw materials.
Therefore, the quartz was identified as major impurity, which is affected to
cement burning process.
The Quartz has some special characteristic like, highly Chemical
inertness, High melting point, Specific crystal structure and high hardness (7).
Therefore, the quartz removing is very important to get quality clinker with low
production cost. Several methods were introduced to minimize quartz in
cement raw materials as removing of some quartz layers by optical
Identification, Better bed cleaning methods and planned material collection
system.
A 3D model was prepared by analysis of large amount of
representative samples to show the quartz variation of the quarry. Therefore,
it will be very useful to future quarry planning without or minimum quartz in the
cement raw materials and get quality clinker without burning problems.
