Efficient kiln drives

A substantial amount of power is used to rotate the kiln. The higher efficiencies are achieved using a single pinion drive with an air clutch and a synchronous motor. The system would reduce power use for kiln drives by a few percent, at slightly higher capital costs. More recently, the use of alternate current (AC) motors is advocated to replace the traditionally used direct current (DC) drive. The AC motor system may result in slightly higher efficiencies and has lower investment costs

Development Status Products

Efficient kiln drivesCosts & Benefits

Parent Process: Clinker Making
Energy Savings Potential

0.5 – 1% reduction in electricity use of the kiln drive can be achieved  by replacing a DC motor with AC motor.

Using high-efficiency motors to replace older motors, or instead of re-winding old motors, may reduce power costs by 2 to 8%. 

Electricity savings are  0.55-3.9 kWh/t clinker 

CO2 Emission Reduction Potential

The capital cost for single pinion drive with an air clutch and a synchronous motor is around 6% higher than standard kiln drive.

Efficient kiln drives 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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