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| CEMENT INDUSTRY |
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Introduction on Indian Cement
Industry
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Cement
is one of the core industries, which plays a vital role
in the growth of a nation. India ranks fifth among the
cement producing countries in the world. The present
per capita cement consumption is around 84kg, which
is much lower than the per capita consumption of the
developed countries.
| Recent
Government pronouncements indicate that, the per
capita consumption will increase to 120 kg in
the next three years. |
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With
the tremendous growth potential projected, there
has been and will be a tremendous increase in
the number of cement plants. The cement industry
is also highly energy intensive, with more than
40% of the manufacturing cost being contributed
by energy. |
With this growth & increasing competitiveness and
the increasing gap between demand and supply of energy,
there is an imperative need to operate in an energy
efficient manner. The best method to achieve this energy
efficient operation is, to incorporate energy efficiency
at the design stage itself.
The various energy conservation aspects to be considered,
while designing a new cement plant/upgrading an existing
plant are discussed. The electrical energy saving aspects
are covered under the following different headings
- Mines, Crusher & Stacking
- Mill
- Blending and homogenisation
- Kiln and cooler
- Coal mill
- Cement mill
- Packing plant
- Others
The thermal energy consumption in the cement plant is
only in kiln section. Thermal energy is also occasionally
used in the hot air furnace for drying of coal in the
coal mill and for drying of slag/fly-ash in cement mill.
The energy saving aspects and the specific energy consumption
figures mentioned is applicable to dry process pre-calciner
plants of more than 1500 TPD capacity.
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