High-Efficiency Separators and Classifiers

Separators and classifiers separate larger particles so that they can be sent back to mill for further grinding. Separators or classifiers with higher efficiency give more accurate separation and thereby reduce over-grinding and mill energy consumption. Improved separation also helps increasing the mill capacity, improving the clinker quality – due to better size distribution – and can reduce the energy consumption in the kiln.


Development Status Products
clinker, Cement

High-Efficiency Separators and ClassifiersCosts & Benefits

Parent Process: Raw Material Preparation
Energy Savings Potential

Case studies have shown that the specific electricity use in material preparation can be reduced by 2.8-3.7 kWh/t-raw material. 

CO2 Emission Reduction Potential

Chinese flag For Chinese context, reductions are estimated to be 2.2 to 2.9 kg-CO2/t-raw material (assuming 0.79 kg CO2/kWh electricity)
Indian flag For Indian context, reductions are estimated to be 2.3 to 3.0 kg-CO2/t-raw material (assuming 0.81 kg CO2/kWh electricity)


Chinese flag Investments are estimated to be US $5.5/t annual raw material processed.

Indian flag For India investment costs are reported to be $10 - 20 million (or $25 000 to $30 000 per t/h capacity) depending upon the type & size. 

High-Efficiency Separators and ClassifiersSchematic

High-Efficiency Separators and Classifiers Publications

Energy Efficiency Improvement Opportunities for the Cement Industry

The U.S. Environmental Protection Agency’s (EPA) energy guide, Energy Efficiency Improvement and Cost Saving Opportunities for Cement Making, discusses energy efficiency practices and technologies that can be implemented in cement manufacturing plants. This ENERGY STAR guide provides current real world examples of cement plants saving energy and reducing cost and carbon dioxide emissions.

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