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Patent Searching and Data


Title:
APPARATUS FOR PREPARING METALLIC MAGNESIUM
Document Type and Number:
Japanese Patent JPS58217650
Kind Code:
A
Abstract:

PURPOSE: To prevent the deterioration in the heat insulating property of a furnace wall caused by the condensation of Mg to said furnace wall, by a method wherein a heat resistant partition wall plate which does not pass Mg vapor is provided to the middle part of the lining layer formed to the furnace body of an electric furnace for preparing metallic Mg and an inert gas is sealed between a shell and the partition wall plate.

CONSTITUTION: A mixture of a stock material such as dolomite containing MgO and an Fe-Si-Al alloy as the reducing agent of MgO are introduced into an electric furnace and heated by using a graphite electrode to reduce MgO to Mg which is in turn taken out as Mg vapor to be cooled and condensed to ccollect metallic Mg. Between the refractory heat insulating brick 2 and a lining refractory brick or a carbon block 4 of the electric furnace used in this case, a heat resistant partition wall plate 6 such as a dense asbesto board is provided while an inert gas with pressure higher than the vapor pressure of Mg in the furnace is sealed in the space between the partition wall plate 6 and a furnace shell 1. Mg vapor is prevented from being permeated into the furnace wall and condensed thereon by the partition wall plate 6 and the inert gas and, therefore, it is prevented that heat efficiency is lowered by the rising in the temp. of the furnace wall caused by the lowering in heat insulating property due to an Mg condensation layer.


Inventors:
TOYODA TOSHIO
MATSUMURA SHIGERU
SUZUKI KUNITERU
KIMOTO YOSHIO
HOUNOKI HIDEAKI
Application Number:
JP1982000097525
Publication Date:
December 17, 1983
Filing Date:
June 09, 1982
Export Citation:
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Assignee:
JAPAN METALS & CHEM CO LTD
International Classes:
C22B26/22; (IPC1-7): C22B26/22