Methods and apparatus for metal recovery from slag

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United States of America Patent

PATENT NO 10174403
APP PUB NO 20170362680A1
SERIAL NO

15537708

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Abstract

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A method for recovering metal values from a molten slag composition includes atomizing the slag with an oxygen-containing gas in a gas atomization apparatus, to produce solid slag granules. Oxygen in the atomizing gas converts metals to magnetic metal compounds, thereby magnetizing the metal-containing slag granules. These metal-containing slag granules are then magnetically separated. Larger amounts of metals may be removed by passing the molten slag through a pre-settling pan with an adjustable base, and/or discontinuing atomization where the metal content of the slag exceeds a predetermined amount. Solid slag granules produced by atomization may be charged to a recovery unit for recovery of one or more metal by-products. An apparatus for recovering metal values from molten slag includes a gas atomization apparatus, a flow control device for controlling the flow of atomizing gas, a control system, and one or more sensors to detect metal values in the slag.

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Patent Owner(s)

Patent OwnerAddress
HATCH LTDMISSISSAUGA ONTARIO L5K 2R7

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cramer, Matthew H Milton, CA 2 0
Faucher, Santiago Oakville, CA 62 241
Mostaghel, Sina Toronto, CA 3 2
Nell, Johannes Johannesburg, ZA 4 7
So, Lai Chi Mississauga, CA 5 11

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