MELTING FURNACE

WIPO Patent Application WO/2020/235579

A1

Provided is a melting furnace that minimizes oxidation of molten material and with which it is possible to improve the quality of a molten material. As shown in fig. 3, this melting furnace 1 is provided with: a melting part 2 to which a metal material is supplied; a burner 4 for melting the metal material in the melting part 2 so as to obtain a molten material; a heating part 5 which receives the molten material from the melting part 2 and raises the temperature of said molten material; a temperature adjustment part 6 which receives the molten material from the heating part 5 and accumulates said molten material therein; a partition wall 7 which separates the heating part 5 from the temperature adjustment part 6, and that has a lower end 70 immersed in the molten material in such a manner as to form, in a lower part of said partition wall 7, an inflow port 71 through which the molten material is allowed to flow into the temperature adjustment part 6 from the heating part 5; an immersion heater 10 which has at least a portion thereof immersed in the molten material within the temperature adjustment part 6 so as to heat the molten material; and a gas introduction passage 72 which is formed in the partition wall 7 and through which combustion gas from the burner 4 is introduced into a space over the molten material within the temperature adjustment part 6, wherein control is performed on the burner 4 so as to keep the oxygen concentration in the combustion gas at 5% or lower.

JPS5844731	[Title of the Invention] A control method of a solidification interface in high purity aluminum production
WO/2011/035187	SELECTIVE-CATION-REMOVAL PURIFICATION OF ALUMINUM SOURCE
WO/2008/103802	METHODS, SYSTEMS AND APPARATUS FOR PRODUCING ALUMINUM USING CARBON DIOXIDE AS A REACTIVE COVER GAS

KAJITANI TSUYOSHI (JP)

PCT/JP2020/019860

November 26, 2020

May 20, 2020

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KAJITANI TSUYOSHI (JP)
NIPPON CRUCIBLE CO (JP)
YOSHIGUCHI KAZUMI (TH)
SHOEI MFG CO LTD (JP)
SHOEI IND HEATING EQUIPMENT SHANGHAI CO LTD (CN)

C22B21/06; C22B9/16; F27B3/04; F27B3/20; F27D17/00

JP2006071266A	2006-03-16
JPH0297890A	1990-04-10
JPS59185982A	1984-10-22

KAJITANI, TSUYOSHI ET AL.: "The Oxidation Restraint Furnace", TYUZO JOURNAL, vol. 13, no. 6, 20 June 2017 (2017-06-20), pages 8036 - 8039
KAJITANI, TSUYOSHI ET AL.: "The Oxidation Restraint Furnace", LECTURE SUMMARIES OF THE 170TH JFS MEETING OF THE JAPAN FOUNDRY ENGINEERING SOCIETY MEETING, September 2017 (2017-09-01), pages 113, DOI: doi.org/10.11279/jfeskouen.170_113

SAEGUSA & PARTNERS (JP)

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