PROCESS FOR PREPARING WHITENED FLY ASH.

Mexico Patent

APP PUB NO MX-2023001768-A
SERIAL NO

2023001768

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Abstract

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The present invention relates to a process for preparing whitened fly ash, wherein the process comprises 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 90wt% has a particle size of from 44µm to 250µm; (b) optionally, contacting the size classified fly ash from step (a) with water so as to form a slurry, wherein the slurry has a solid content of less than 40wt%; (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 comprises 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 a milling step to form whitened fly ash.

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Patent Owner(s)

Patent OwnerAddress
VECOR IP HOLDINGS LTDHKROOM 801 EAST CHINA COMMERCIAL BUILDING NO 78 WEN DONG STREET SHEUNG WAN HONGKONG CHINA

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Inventor(s)

Inventor Name Address
FERNANDEZ ERWIN N -
SEVERIN ERIK KOWLOON TSIMSHATSUI
MISA JOHN VINCENT ADAP -

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