Heat Recovery efficiency in cement
In cement, heat recovery is a major energy cost and a strong efficiency opportunity. Heat recovery captures energy that would otherwise be vented — from flue gas, hot process streams, compressors and refrigeration — and reuses it to preheat feedwater, air or process flows. Matching the grade of recovered heat to a real, coincident demand is the key.
Why it matters in cement
Cement is one of the most energy- and carbon-intensive industries on earth, dominated by the rotary kiln and its preheater tower. Reliability of crushers, fans, kilns and mills is critical, and waste-heat recovery from kiln exhaust is a major efficiency and decarbonization lever.
Much of the energy a plant buys leaves as low- and medium-grade waste heat. Recovering even part of it — with economisers, air preheaters, heat exchangers or heat pumps — directly cuts fuel use, and is a core no-regrets step in any decarbonization plan.
The efficiency levers
- Recover flue-gas heat with economisers/air preheaters
- Capture compressor and refrigeration reject heat
- Use heat exchangers between hot and cold streams
- Upgrade low-grade heat with industrial heat pumps
- Match recovered heat to a real, coincident demand
Energy-intensive equipment in cement
- Rotary kilns and preheater towers
- Raw and cement mills
- Large process and ID fans
- Crushers and conveyors
- Clinker coolers
Related
Heat Recovery efficiency guide · AI & efficiency in cement · All efficiency topics