OPERATING METHOD FOR METAL REFINING FURNACE

WIPO Patent Application WO/2019/163607

A1

Provided is an operating method for a metal refining furnace that can control against deformation of a furnace body due to expansion of refractories of the metal refining furnace. Displacement meters 8-1 through 8-42 are disposed around a furnace body 2 at predetermined intervals, the overall displacement of the furnace body 2 is periodically measured at predetermined timing, and when displacement in at least one location exceeds a preset upper-limit value, control is performed so as to reduce the operating temperature in the furnace body 2 such that the displacement of the furnace body 2 is brought down to at most the upper-limit value. In addition, the renewal time for the furnace body 2 is determined from a residual linear expansion coefficient of the furnace body 2 and a displacement limit of frames constituting the furnace. Consequently, not only can expansion and deformation of the furnace body 2 be kept within a predetermined range, but the furnace materials can also be renewed at appropriate timing.

MOTOMURA TATSUYA (JP)
KAWASAKI TOMOYA (JP)
YUKISATO TAKEHIDE (JP)
CHIDA HIROSHI (JP)

PCT/JP2019/005123

August 29, 2019

February 13, 2019

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PAN PACIFIC COPPER CO LTD (JP)

C22B15/00; C22B5/02; F27D19/00; F27D21/00

WO2005093105A1

2005-10-06

JPS60110821A	1985-06-17
JPS60110820A	1985-06-17
JPS60110819A	1985-06-17
JP2006308497A	2006-11-09
JP2011027300A	2011-02-10
JP2008180451A	2008-08-07

SAITO Seiichi (JP)

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