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| Calculation of burnability index K1450 of raw meal and its influence factor research and application |
| GUO Suihua, et al. |
| State Key Laboratory of Green Building Materials, China Building Materials Academy Limited Company, Beijing 100024, China |
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Abstract Burnability index K1450 of raw meal is a technical parameter which was proportional to the rate constant of C3S formation in clinker burning, and could be calculated based on chemical compositions of the raw meal doped with coal ash and free lime content in samples burnt at 1 450 ℃. Higher K1450 value means a better burnability of raw meal, and there were four factors having significant impacts on it, including coarse quartz and fluoride level in the raw meal, liquid quantity and alumina ratio in clinker design. The relative variation of heat consumption of clinker could be estimated very precisely in a plant based on K1450 values of raw meal. When K1450 was improved from 30 to 70, the heat consumption could be decreased by more than 10%. For a raw meal with good burnability (K1450>70), the clinker sintering could be realized with a quicker heating rate and less time required at the burning zone, while reducing conditions inside the kiln could also be reduced obviously, which were all contributing a lower heat consumption for clinker burning. With above conditions, the activity of the clinker could be improved remarkably by further optimization if reasonable sizes and morphologies of Alite have been obtained.
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Published: 28 September 2018
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2018, Vol. 0 
