Hardplate

4 grinding questions
Question 1: How can we can reduce the environmental impact of grinding?
Question 2: And increase productivity?
Question 3: And increase availability?
Question 4: And decrease cost?

4 grinding questions
Question 1: How can we can reduce the environmental impact of grinding?
Question 2: And increase productivity?
Question 3: And increase availability?
Question 4: And reduce cost?

Environmental impact

- Cement production requires 90-130 kWh per ton of cement. “Best available Techniques” for the Cement Industry, A contribution from the European Cement Industry to the exchange of information and preparation of the IPPC BAT REFERENCE Document for the cement industry, December 1999, Cembureau

“Competitiveness of the European cement industry”, Cembureau. In http://www.cembureau.be/Cem_warehouse/2COMPETITIVENESS%20OF%20THE%20EUROPEAN%20CEMENT%20INDUSTRY.PDF

Environmental impact

Major consumers of electrical energy in cement manufacture: • mills (cement mills, raw mills, coal mills)
• large fans (kiln system and cement mills).

“Best available Techniques” for the Cement Industry, A contribution from the European Cement Industry to the exchange of information and preparation of the IPPC BAT REFERENCE Document for the cement industry, December 1999, Cembureau

Environmental impact

Grinding: specific electricity consumption

– Cement raw grinder, dry-process cement plants: ~7 kWh/t [1]
– Slag grinding: 20% higher than in Portland cement grinding (4000 Blaine) [2]

[1] “Best available Techniques” for the Cement Industry, A contribution from the European Cement Industry to the exchange of information and preparation of the IPPC BAT REFERENCE Document for the cement industry, December 1999, Cembureau
[2] “OK Vertical Roller Mill”, F.L.Smidth brochure

Environmental impact

The waste hierarchy triangle

“Guidelines for the selection and use of fuels and raw materials in the cement manufacturing