Powder dosing method
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsMeryl BROTHIER, Stéphane VAUDEZ
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Abstract
A method for dosing non-flowable powders. The method comprises the following: a) adding a cryogenic fluid, the powders to be dosed, and carbon dioxide in solid form, the mean particle diameter of which is between 0.1 and 10 times that of the powders; b) mixing and suspending the powders with the cryogenic fluid and the carbon dioxide in solid form to obtain a cryogenic suspension, the density percentage of the powders corresponding to 10%<[powders]vol<80%; c) removing the cryogenic suspension; d) controlling the dosage of the powders according to one or more parameters linked to the step of mixing and suspending the powders b); and e) dosing the powders.
Claims10
A method for dosing non-flowable powders, the method comprising:
- a) adding a cryogenic fluid, powders to be dosed, and carbon dioxide in solid form in a mixing and suspension system, the mean particle diameter of the carbon dioxide in solid form being between 0.1 and 10 times that of the particle size of the powders to be dosed;
- b) mixing and suspending the powders with the cryogenic fluid and the carbon dioxide in solid form to obtain a cryogenic suspension, the density percentage of the powders satisfying the following equation (i):
- 10
-
- %
- <
- [
- powders
- ]
- vol
- <
- 80
-
- %
- ,
- (
- i
- )
- where [powders]vol is the density percentage of the powders;
- c) removing the cryogenic suspension, comprising extracting the cryogenic suspension under conditions of temperature greater than or equal to ambient temperature and pressure less than or equal to atmospheric pressure;
- d) controlling a dosage of the powders according to one or more parameters linked with the mixing and suspension step b);
- and
- e) dosing the powders.
Dependencies are inferred from the claim text.