Clinker burning kinetics and mechanism

1
Clinker burning kinetics and mechanism

• PhD student Samira Telschow
• Supervisor Kim Dam-Johansen
• Co-Supervisor Stig Wedel
• Flemming Frandsen
• Kirsten Theisen, FLSmidth

2
Dry Clinkerization Process
?290C
Raw meal inlet
Preheater
?890C
Calciner
Rotary kiln fuel
Calciner fuel
Rotary kiln 900-1500oC
Clinker
Air
3
Dry Clinkerization Process
Alite
Belite
Aluminate/ Ferrite
Pore
100µm
4
Project Objective

• thermal energy of 3.1-3.5 MJ/kg consumed

• ca. 100 kWh/t of electrical power for
  grinding

Increasing grindability
Goal

• Crystal size
• Porosity
• Particle size

Clinker properties
5
Project Objective
Parameters to focus on

• Raw meal composition
• Size distribution of compounds
• Burning temperature
• Heating rates
• Gas atmospheres
• Rotation velocity

6
Project Objective
Furnace
1600oC
T
900oC
1600
900
1075
1250
1425
7
Tak for jeres opmærksomhed! Thank you for your
attention !