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Loesche's 2+2 and 3+3 technology
for clinker and slag grinding
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The first Loesche 2+2 mill for clinker and slag grinding at Pu-Shin
plant of Lucky Cement, Taiwan, R.O.C. |
Loesche introduced the 2+2 technology for clinker and slag grinding in 1994
into the market. The first mill of this kind started up in 1994 in the
Pu-Shin plant of Lucky Cement, Taiwan, R.O.C.. It produces 500.000 t/y of a
3.400 cm²/g OPC and 250.000 t/y of ground granulated blast furnace slag (GGBS)
of 4.300 cm²/g. The second mill started up early 1995 for GGBS only.
Since then the 2+2 system became a widespread reliable technology for clinker
and slag grinding. Until the end of 2002 36 mills have been installed
with a total power of approx. 110.000 kW and a production capacity in total
of approx. 5.500 t/h.
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Loesche´s first 3+3 cement mill
installation at Orissa Cement, India.
The world´s largest cement mill with
300 t/h |
It was not until 2003 that demand for mills in the cement industry began to
pick up slowly. Now, however, customers were looking for bigger and more
powerful mills. Loesche received orders from Orissa Cement and Dalmia Cement
in India for what was at the time the largest cement mill in the world,
the LM 56.3+3. The mill has the capability of producing over 300 t/h. In the
first 20 hours of operation, the plant OCL in Rajgangpur produced
an astonishing 6.300 tonnes of cement.
The mills produce OPC as well as cements with interground additives like blast
furnace slag, limestone, pozzolana and fly ash. The excellent drying capability
of the mills allow the use of moist additives. In many plants the high
flexibility of the system is utilized and between 2 and 6 different types of
cement are produced in the same mill. Switching from one product to the other
can be done within minutes.
GGBS can be produced in Loesche mills with the 2+2 and 3+3 technology highly energy
efficient. The drying capability
of the Loesche mill allows the use of slag with moisture contents of 15 %
and more. Surface areas of more than 6.000 cm²/g (BLAINE) have been reached.
Power savings of 50 % and more in comparison to ball mills can be achieved.
For more detailed information please ask for our brochures or
contact our product manager directly by clicking into the
mail directory.
Please have a look into our
references as well.
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