THREE-PHASE AC ELECTRODE TYPE ELECTRIC FURNACE

Title:

THREE-PHASE AC ELECTRODE TYPE ELECTRIC FURNACE

Document Type and Number:

Japanese Patent JP2017015330

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To provide a three-phase AC electrode type electric furnace capable of extending a furnace life by restricting leakage of molten material through a furnace bottom refractory or bulging-out problem at a side wall steel shell caused by bulging-out of the furnace bottom refractory while keeping substantially a large in-furnace effective volume.SOLUTION: This invention relates to a ferro-nickel refining three-phase AC electrode type electric furnace in which a furnace bottom part is processed with lining by a furnace bottom refractory 3 applied to an inside of a furnace bottom steel shell 1b and a cushion paste 6 arranged at its peripheral edge, in which a joint margin of the furnace bottom refractory 3 is [A-B]/A×100[%] or more, and C/A×100[%] or less of theoretical expansion amount of the furnace bottom refractory 3 at the operation time temperature where A% is a theoretical expansion amount of the furnace bottom refractory 3 at the operation time temperature, B% is an allowable deformation amount of the furnace bottom refractory 3 at the operation time temperature and C% is a theoretical expansion amount at the lowest temperature of the furnace bottom refractory 3 where the temperature becomes the lowest temperature at the time of operation.SELECTED DRAWING: Figure 1

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Inventors:

YAMAGUCHI MASAHIRO
KUDO KAZUO
YAMAGIWA MASAYUKI

Application Number:

JP2015132892A

Publication Date:

January 19, 2017

Filing Date:

July 01, 2015

Export Citation:

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Assignee:

HYUGA SEIRENSHO:KK

International Classes:

F27D1/00; C21C5/52; F27B3/14; F27D1/04

Domestic Patent References:

JP2014105904A	2014-06-09
JPS59229179A	1984-12-22
JPS556123A	1980-01-17
JP2005336588A	2005-12-08
JP2002194417A	2002-07-10
JPH085249A	1996-01-12

Foreign References:

WO2009028416A1

2009-03-05

Attorney, Agent or Firm:

Noriyuki Tsujikawa

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