Back to results
US 2025/0091120 A1Published application
Device and method for preparing cooling water on demand
AssigneeC-TEC Constellium Technology Center
InventorsPascal HERVIEU, Bernard VALENTIN, José ORTUNO
Life of this patent
Estimating the term…
Abstract
A preparation method for preparing cooling water which aims to reproduce a target cooling water by using at least two aqueous solutions selected from an industrial water solution, a cationic ion exchange resin-treated water solution, a demineralized water solution and an aqueous solution containing Mg2+ and Ca2+ ions; a casting method using the cooling water obtained according to the preparation method; and a casting device (100) including the preparation device.
Claims15
A method for preparing a cooling water (1) for cooling a product during a metallurgical transformation operation and in particular for semi-continuous casting applications of cast products, the preparation method comprising the following steps:
- a step (E1) of analyzing the composition of a target cooling water so as to determine a target final composition (cfc),
- a step (E6) of providing at least one first aqueous solution characterized by a first composition (c1) and at least one second aqueous solution distinct from the first aqueous solution and characterized by a second composition (c2), said first aqueous solution and said second aqueous solution being selected from the group composed of:
- an industrial water solution (3) with a conductivity lower than or equal to 2,000 μS/cm with a hardness lower than or equal to 80° f (French degree),
- a cationic ion exchange resin-treated water solution (5) with a conductivity higher than or equal to 100 μS/cm, which is either a decarbonated water such as TH5≤TAC5+3° f, or a permuted water such as TH5≤3° f, where TH5 and TAC5 are respectively the hardness and the P-alkalinity of the cationic ion exchange resin-treated water solution (5) considered in French degree ° f,
- a demineralized water solution (7) with a conductivity lower than or equal to 100 μS/cm,
- an aqueous solution containing Mg2+ and Ca2+ ions (9), with conductivity higher than or equal to 20 μS/cm, such that its hardness TH9 is higher than 50° f,
- a mixing phase (P3) comprising a first mixing step (E8) in which a first volume (V1) of the first aqueous solution and a second volume (V2) of the second aqueous solution are mixed, so as to make a mixing volume (Vm1) of a mixture solution characterized by a mixture composition (cm1), and forming all or part of the cooling water (1), said first volume (V1) of the first aqueous solution and second volume (V2) of the second aqueous solution being determined by a calculation step (E7) according to said first composition (c1) and said second composition (c2),
- and wherein each of the first composition (c1), the second composition (c2), the mixture composition (cm1), and the target final composition (cfc), is defined by at least one useful parameter selected from the group comprising a calcium concentration (THCa), a magnesium concentration (THMg), a M-alkalinity (TAC), a P-alkalinity (TA), a Hardness (TH), a concentration of chlorides (CCI), sulfates (CS), bromides (CBr), sodium (CNa) ions and a pH;
- said calculation step (E7) in which the first volume (V1) of the first aqueous solution and the second volume (V2) of the second aqueous solution are determined according to said at least one useful parameter defining the first composition (c1), said at least one useful parameter defining the second composition (c2), and so that said at least one useful parameter defining the mixture composition (cm1) tends towards said at least one useful parameter defining the target final composition (cfc).
6 more elements
A casting device (100) comprising a device (50) for preparing a cooling water (1), said preparation device (50) comprising:
- an analysis unit (60) configured to measure at least one useful parameter selected from the group comprising:
- a calcium concentration (THCa), a magnesium concentration (THMg), a M-alkalinity (TAC), a P-alkalinity (TA), a Hardness (TH), and the pH,
- a calculation unit (30) configured to determine the first volume (V1) of the first aqueous solution and the second volume (V2) of the second aqueous solution according to a useful parameter defining the first composition (c1), a useful parameter defining the second composition (c2), and so that a useful parameter defining the mixture composition (cm1) tends towards a useful parameter defining the target final composition (cfc),
- a cation exchanger (20) comprising an active material, said cation exchanger (20) being configured to vary between a charged configuration in which calcium Ca2+ or magnesium Mg2+ divalent cations are bonded to the active material, and a regenerated configuration in which the active material is able to capture calcium Ca2+ or magnesium Mg2+ divalent cations, said cation exchanger (20) comprising means allowing connecting it to the mixing unit (31), preferably said cation exchanger (20) comprises a weak cationic ion exchange resin (21) or a strong cationic ion exchange resin (23),
- a mixing unit (31) configured to receive a first aqueous solution characterized by a first composition (c1) and a second aqueous solution distinct from the first aqueous solution and characterized by a second composition (c2), said first aqueous solution and said second aqueous solution being selected from the group composed of:
- an industrial water solution (3),
- a cationic ion exchange resin-treated water solution (5),
- a demineralized water solution (7),
- an aqueous solution containing Mg2+ et Ca2+ ions (9), said mixing unit (31) being further configured to mix a first volume (V1) of said first aqueous solution and a second volume (V2) of said second aqueous solution, so as to make a mixing volume (Vm1) of a mixture solution characterized by a mixture composition (cm1) and forming all or part of the cooling water (1), said first volume (V1) of the first aqueous solution and second volume (V2) of the second aqueous solution being determined according to said first composition (c1) and said second composition (c2), and so that the mixture composition (cm1) tends towards a predetermined target final composition (cfc).
6 more elements
Dependencies are inferred from the claim text.