Energy saving cement production by grain size optimisation of the raw meal
Autor(en): |
B. Simons
|
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Medium: | Fachartikel |
Sprache(n): | Englisch |
Veröffentlicht in: | Revista IBRACON de Estruturas e Materiais, Juni 2009, n. 2, v. 2 |
Seite(n): | 201-210 |
DOI: | 10.1590/s1983-41952009000200005 |
Abstrakt: |
The production of cement clinker is an energy consuming process. At about 50% of the energy is associated with grinding and milling of the raw meal, that normally is in the range 100%<200 μm with 90%<90 μm. Question: is it possible to use coarser components of the raw meal without reducing the clinker quality. With synthetic raw meals of various grain sizes the clinker formation was studied at static (1100 - 1450°C) and dynamic conditions (heating microscope). A routine to adjust the grain size of the components for industrial raw meals is developed. The fine fraction<90 μm should mainly contain the siliceous and argileous components, whereas the calcitic component can be milled separately to a grain size between 200-500 μm, resulting in lower energy consumption for milling. Considering the technical and economical realizability the relation fine/coarse should be roughly 1:1. The energy for milling can be reduced significantly, that in addition leads to the preservation of natural energy resources. |
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12.02.2020