Lance unblocking method and apparatus

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11162733
APP PUB NO 20180038650A1
SERIAL NO

15551526

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A method of removing a blockage in a solids injection lance under normal operating conditions of a direct smelting vessel is disclosed. The direct smelting vessel contains a bath of molten metal and slag and the solids injection lance extends into the direct smelting vessel and has an outlet end that is submerged in the molten slag. The solids injection lance further has a single inlet coupled to a section of supply line that conveys gas and solid feed material to the solids injection lance. The method comprises (a) advancing a blockage-removing tool through the supply line section and through the solids injection lance to an upstream side of the blockage, (b) operating the tool under elevated gas pressure conditions to remove the blockage such that solid feed material and gas are able to flow through the solids injection lance. The method further comprises (c) retracting the tool from the solids injection lance and the supply line section. Also disclosed is an apparatus for removing a blockage in a solids injection lance extending into a direct smelting vessel.

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Patent Owner(s)

  • TATA STEEL LIMITED

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dry, Rodney James City Beach, AU 48 368
Hayton, Mark Bateman, AU 9 57
Pilote, Jacques Woodlands, AU 17 25

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