Method and plant for making alumina cement and alumina cement
AssigneeLafarge Aluminates
InventorsBruno Espinosa, Thomas Bier
Life of this patent
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Abstract
The concentration d3 is alumina AL2O3, —A—, and the concentration d4 in lime CaO, —C—, in the initial mixture are such that d3/d4 ranges between 1.15 and 1.40. Grinding produces a cement with a size distribution as represented in a Rosin Rammler diagram has a gradient ranging between 0.75 and 0.90.
Claims6
A method of making alumina cement in which a batch composition is obtained, from an initial mixture consisting essentially of bauxite and of limestone, the said composition is baked in a furnace in order to form a clinker containing alumina oxide Al2O3, —A—, and lime CaO, —C—, partially in the form C12A7 on the one hand and in the form CA on the other, whereas the said clinker is then ground with other possible secondary constituents to form the cement,
- characterised in that the concentration d3 in alumina Al2O3, —A— and the concentration d4 in lime CaO, —C— in the initial mixture are such that d3/d4 ranges between 1.15 and 1.40, and grinding produces a cement with size distribution as represented in a Rosin Rammler diagram has a gradient ranging between 0.75 and 0.90.
An alumina cement comprising alumina oxide Al2O3, —A—, and lime CaO, —C—, wherein the concentration d3 in alumina Al2O3, —A— and the concentration d4 in lime CaO, —C— in the initial mixture are such that d3/d4 ranges between 1.15 and 1.40, and its size distribution represented in a Rosin Rammler diagram has a gradient ranging between 0.75 and 0.90.
Dependencies are inferred from the claim text.