Case Study

CASE STUDY: OPTIMIZATION OF CLINKER CONTENT IN LIMESTONE-BASED CEMENTS – BALL MILL PROCESS

26 juillet 22

OBJECTIVE

This case study is based on a real field trial to produce cement with lower carbon footprint optimazing clinker factor and SCM content.

The 2 main objectives of the field trial were:

  • From product side: to substitute Type 1 cement (CEM I) by Type 1L cement (CEM II/A-L) maintaining strength profile equal or better than Type 1 at all ages
  • From Production side: to maintain production with a mill output around ~150 mTph

DESCRIPTION

During this field trial, we have compared CHRYSO®ICARE technology to a conventional product in terms of mill output and we have adjusted limestone addition and fineness/blaine targets.
The Type 1 cement (reference) and the Type 1L cement were sampled for lab testing.

Details and targets :

Cement type: ASTM C595 Type 1L (CEM II/A-L)
Process type: Roller press + Ball Mill
Mill output: 150 mTph
CHRYSO tested product: CHRYSO®ICARE RP2199-5

 

MANAGEMENT & OBSERVATIONS

During this first field trial, CHRYSO®ICARE technology has shown its benefits:

  • Lower dosage
  • Limestone content: +4pt
  • Mill output: +5pt
  • Carbon footprint*: -32kg eqCO2 /T of cement
  • Mechanical strengths:
    • 7d : +4MPa
    • 28d : +7MPa

* Assumptions:
Limestone: 10kg eqCO2 /T
Clinker: 800kg eqCO2 /T

TECHNICAL
TARGETS
SUCCESSFULLY
ACHIEVED

As late strengths are high, the next step is to perform a long-term trial to increase limestone content. There are different levers to reach this target, for example:

  • Optimization of the PSD
  • Adjust CHRYSO®ICARE RP2199-5 to reach higher early strengths
  • Perform a mill audit to optimize grinding process

LEARN MORE ABOUT CHRYSO®ICARE TECHNOLOGY Download the case study

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