METHOD FOR REMOVING IMPURITY FROM MAGNESIUM

PURPOSE:To obtain high purity Mg by bringing molten Mg contg. impurities such as Fe and Mn into contact with boric acid or a borate so as to separate and remove the impurities. CONSTITUTION:Mg contg. impurities such as Fe and Mn is melted, diboron trioxide, boric acid such as orthoboric acid or an a...

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Hauptverfasser:	OKI SHIYUUJIROU, HIRASAWA YOSHIKAZU, KIKUTA TOSHIHARU
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator	OKI SHIYUUJIROU HIRASAWA YOSHIKAZU KIKUTA TOSHIHARU
description	PURPOSE:To obtain high purity Mg by bringing molten Mg contg. impurities such as Fe and Mn into contact with boric acid or a borate so as to separate and remove the impurities. CONSTITUTION:Mg contg. impurities such as Fe and Mn is melted, diboron trioxide, boric acid such as orthoboric acid or an alkali metallic borate such as sodium tetraborate is mixed with a flux for melting Mg by 1-20kg (expressed in terms of boron) per 1 ton Mg, and the molten Mg is brought into contact with the mixture at >=700 deg.C. Boron produced by the reduction of the borate with the Mg bonds to the Fe, Mn, etc., and the resulting compounds settle and form sludge together with oxides and nitrides absorbed in the flux. The sludge is then separated to obtain high purity Mg usable as a reducing agent in the manufacture of Ti or Zr.
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CONSTITUTION:Mg contg. impurities such as Fe and Mn is melted, diboron trioxide, boric acid such as orthoboric acid or an alkali metallic borate such as sodium tetraborate is mixed with a flux for melting Mg by 1-20kg (expressed in terms of boron) per 1 ton Mg, and the molten Mg is brought into contact with the mixture at >=700 deg.C. Boron produced by the reduction of the borate with the Mg bonds to the Fe, Mn, etc., and the resulting compounds settle and form sludge together with oxides and nitrides absorbed in the flux. 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CONSTITUTION:Mg contg. impurities such as Fe and Mn is melted, diboron trioxide, boric acid such as orthoboric acid or an alkali metallic borate such as sodium tetraborate is mixed with a flux for melting Mg by 1-20kg (expressed in terms of boron) per 1 ton Mg, and the molten Mg is brought into contact with the mixture at >=700 deg.C. Boron produced by the reduction of the borate with the Mg bonds to the Fe, Mn, etc., and the resulting compounds settle and form sludge together with oxides and nitrides absorbed in the flux. The sludge is then separated to obtain high purity Mg usable as a reducing agent in the manufacture of Ti or Zr.</abstract><oa>free_for_read</oa></addata></record>
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subjects	CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
title	METHOD FOR REMOVING IMPURITY FROM MAGNESIUM
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