Sinterable semicoke powder with high bulk density

Details Sinterable semicoke powder with high bulk density Sinterable semicoke powder with high bulk density

C - Chemistry, Metallurgy

01

B

C01B 31/02 (2006.01) C01B 31/04 (2006.01) C04B 35/52 (2006.01) C04B 35/528 (2006.01) C04B 35/532 (2006.01)

Patent

CA 2744889

In a continuous method for production of a semicoke powder with high bulk density and flowability, a sinterable carbon powder (semicoke) is dispersed in water with addition of at least one binder and at least one liquefier, wherein the proportion of carbon in the dispersion is adjusted to at least 50 wt.%, relative to the mass of the dispersion, and the zeta potential of the dispersion is adjusted to less than -50 mV, the dispersion is submitted to homogenisation and stabilisation by continuous wet grinding with a residence time in the mill of less than 3 minutes and the homogeneous dispersion is spray-dried.

L'invention concerne un procédé en continu de production de poudre de semi-coke à haute densité en vrac et haute aptitude à l'écoulement, procédé selon lequel une poudre de carbone (semi-coke) frittable est dispersée dans l'eau, avec addition d'au moins un liant et d'au moins un fluidifiant, caractérisé en ce qu'on règle la fraction de carbone de la dispersion à au moins 50% en poids, par rapport à la masse de la dispersion, en ce qu'on ajuste le potentiel zêta de la dispersion à moins de - 50 mV, en ce qu'on soumet la dispersion à une homogénéisation et à une stabilisation, par broyage humide en continu, avec un temps de séjour dans le broyeur inférieur à 3 minutes, et en ce qu'on sèche par pulvérisation la dispersion homogène.

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