ELECTRIC FURNACE ADJUSTED IN SLAG SOLIDIFICATION LAYER THICKNESS, AND METAL REFINING METHOD USING THE SAME

Japanese Patent JP2016199773

A

PROBLEM TO BE SOLVED: To provide a metal refining method for accurately estimating a side wall coating thickness and adjusting to a prescribed thickness.SOLUTION: A metal refining method includes performing melting reduction of a burned ore by using, for instance, a three-phase AC electrode-type circular electric furnace which has a side wall 1 where a plurality of copper blocks 3 of high thermal conductance are locally inserted from a furnace outer side into a furnace inner side refractory layer of a metallic external wall part. The refining method adjusts an operation condition of the electric furnace, such as a shower water flow amount and a quantity of electricity by obtaining with a thermal flux meter or two or more thermometers 4, thermal flux of side wall parts 1a-1c into which the copper blocks 3 are inserted, and thermal flux of side wall parts 1d-1i excluding said side wall parts, obtaining a thickness of a slag coating layer adhering to a furnace inner side surface of each of the side wall parts 1 from each of the thermal fluxes thus obtained and a melting point of slag generated inside the electric furnace, and comparing the thickness thus obtained to the allowable range thereof.SELECTED DRAWING: Figure 1

MORI KAZUHIRO
KUBOTA NAOKI
KUDO KAZUO

JP2015078199A

December 01, 2016

April 07, 2015

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HYUGA SEIRENSHO:KK

C21C5/52; C21B11/10; F27B3/08; F27B3/14; F27B3/28; F27D21/00; G01K17/00

JP2013127352A	2013-06-27
JPH10122847A	1998-05-15
JP337016406B
JP2013174001A	2013-09-05
JP2013127352A	2013-06-27
JPH10122847A	1998-05-15
JP337016406B
JP2013174001A	2013-09-05

Noriyuki Tsujikawa

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