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AssigneesSicab-Carmeuse France, Marc Gombart
InventorsMarc Gombart, Jean-Yves Tilquin, Stéphane Bartiaux
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A novel use of delayed reactivity partly prehydrated lime (“DRQL”), which is comprised of 40 to 98% by weight of CaO and of 60 to 2% by weight of Ca(OH)2, preferably of 80 to 92% by weight of CaO and of 20 to 8% by weight of Ca(OH)2, and more preferably of 85 to 90% by weight of CaO and of 15 to 10% by weight of Ca(OH)2, in the field of the separation of solid matter from the liquid of a suspension. The invention also involves a novel method for treating a sludge, in which the solid matter is concentrated, dried and recovered using the delayed reactivity partly prehydrated lime. It additionally relates to, as a novel industrial product, the purified sludge obtained according to the method.
A method for the separation, concentration and desiccation of solid matter capable of being dispersed in a liquid, by providing a delayed reactivity partly prehydrated quicklime (DRQL), which is composed of two essential components, CaO and Ca(OH)2 and is associated with at least one metal salt, wherein said metal salt is a Fe3+salt or an Al3+salt, the DRQL is arranged in such a way that, in the presence of water, a reaction (1) between the water and the quicklime (CaO):
A method for the separation, concentration and desiccation of solid matter capable of being dispersed in a liquid, by providing a delayed reactivity partly prehydrated quicklime (DRQL), which is composed of two essential components, CaO and Ca(OH)2 and is associated with at least one metal salt, wherein said metal salt is at least one selected from the group consisting of FeC3, Al2SO4)3 and an Al3+salt, the DRQL is arranged in such a way that, in the presence of water, a reaction (1) between the water and the quicklime (CaO):
Dependencies are inferred from the claim text.