Process for preparing whitened fly ash

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United States of America Patent

PATENT NO 12031044
APP PUB NO 20230287220A1
SERIAL NO

18020772

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Abstract

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A process for preparing whitened fly ash includes the steps of: (a) subjecting fly ash to a size classification step to obtain size classified fly ash having a particle size such that at least 90 wt % has a particle size of from 44 μm to 250 μm; (b) optionally, contacting the size classified fly ash from step (a) with water to form a slurry, wherein the slurry has a solid content of less than 40 wt %; (c) subjecting the slurry obtained in step (b) to an exhaustive magnetic separation step to form magnetically treated fly ash, wherein the exhaustive magnetic separation step includes a first magnetic extraction step and a second magnetic extraction step, wherein the second magnetic extraction step is carried out at a higher magnetic field strength than the first magnetic extraction step; and (d) subjecting the magnetically treated fly ash obtained in step (c) to milling to form whitened fly ash.

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Patent Owner(s)

Patent OwnerAddress
VECOR IP HOLDINGS LIMITED1708-10 THE GATEWAY TOWER 1 25 CANTON ROAD TSIMSHATSUI KOWLOON

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fernandez, Erwin N Kowloon, HK 4 0
Misa, John Vincent Adap Kowloon, HK 3 0
Severin, Erik Kowloon, HK 14 698

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