Dry grinding of steel making slag, ground steel making slag, and its use in construction materials
AssigneeSika Technology AG
InventorsJerome Soudier, Olivier Levesque, Javier Quesada, Joris Gouy-Pailler, Ramiro Garcia
Life of this patent
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Abstract
The use of a grinding additive during the dry grinding of steel making slag, characterized in that the grinding additive is selected from the group consisting of alkanolamines, glycols, glycerol, sugars, sugar acids, carboxylic acids or their salts, superplasticizers, superabsorbent polymers, or mixtures thereof. Also, ground steelmaking slag including the additives and the use of the ground steel making slag in construction materials.
Claims15
A method of dry grinding of steel making slag, comprising dry grinding a steel making slag together with a grinding additive selected from the group consisting of mixtures of triisopropanolamine and diethanolisopropanolamine, or from mixtures of at least one of triisopropanolamine, triethanolamine, diethanolisopropanolamine, and ethanoldiisopropanolamine with at least one of diethylene glycol, glycerol, carboxylic acid, and sugar.
A ground steelmaking slag obtained by dry grinding a steel making slag in the presence of a grinding additive selected form the group consisting of mixtures of triisopropanolamine and diethanolisopropanolamine, or from mixtures of at least one of triisopropanolamine triethanolamine diethanolisopropanolamine, and ethanoldiisopropanolamine with at least one of diethylene glycol, glycerol, carboxylic acid, and sugar.
A method to increase the efficiency of the dry grinding of steel making slag, wherein the steel making slag is dry ground together with an additive selected from the group consisting of mixtures of triisopropanolamine and diethanolisopropanolamine, or from mixtures of at least one of triisopropanolamine, triethanolamine, diethanolisopropanolamine, and ethanoldiisopropanolamine with at least one of diethylene glycol, glycerol, carboxylic acid, and sugar,
- and wherein the additive is added to the slag prior and/or during grinding.
A method to increase the early strength of a cementitious material comprising a ground steel making slag, wherein an additive is added to the slag prior and/or during the grinding of the slag and wherein the additive is selected from the group consisting of mixtures of triisopropanolamine and diethanolisopropanolamine, or from mixtures of at least one of triisopropanolamine, triethanolamine, diethanolisopropanolamine, and ethanoldiisopropanolamine with at least one of diethylene glycol, glycerol, carboxylic acid, and sugar.
Dependencies are inferred from the claim text.