JP2017155285A5

JP2017155285A5 -

Info

Publication number: JP2017155285A5
Application number: JP2016039520A
Authority: JP
Filing date: 2016-03-02
Publication date: 2019-02-21
Anticipated expiration: 2036-03-02

Description

本発明は、
（１）レアメタル含有ガラスからレアメタルを回収する方法であって、閉鎖系内で、レアメタル含有ガラスに含まれている二酸化ケイ素１００質量部あたりの量が３０〜５００質量部であるガラス溶融剤およびレアメタル含有ガラスに含まれている二酸化ケイ素１００質量部あたりの量が３０〜２００質量部である重金属酸化物の存在下でレアメタル含有ガラスを９００〜１１００℃の温度に加熱することによって溶融させ、得られたレアメタル含有ガラスの溶融物に一酸化炭素ガスを接触させながら当該溶融物を６００〜８００℃の温度に冷却し、当該温度を維持することによってレアメタル含有析出物を析出させ、当該レアメタル含有析出物を回収することを特徴とするレアメタル含有ガラスからのレアメタルの回収方法、
（２）回収されたレアメタル含有析出物を水と接触させ、レアメタル含有析出物に含まれているレアメタルを水中に抽出させる前記（１）に記載のレアメタル含有ガラスからのレアメタルの回収方法、および
（３）レアメタル含有ガラスに含まれるレアメタルの原料がレアメタルを含有する廃棄物である前記（１）または（２）に記載のレアメタル含有ガラスからのレアメタルの回収方法
に関する。 The present invention
(1) A method for recovering a rare metal from a rare metal-containing glass, wherein the glass melting agent and the rare metal are 30 to 500 parts by mass per 100 parts by mass of silicon dioxide contained in the rare metal-containing glass in a closed system. The rare metal-containing glass is melted by heating to a temperature of 900 to 1100 ° C. in the presence of a heavy metal oxide whose amount per 100 parts by mass of silicon dioxide contained in the contained glass is 30 to 200 parts by mass. The melt is cooled to a temperature of 600 to 800 ° C. while contacting carbon monoxide gas with the melt of the rare metal-containing glass, and the rare metal-containing precipitate is precipitated by maintaining the temperature. rare metals method of recovering from rare metals-containing glass and recovering a
(2) the recovered rare metal-containing precipitates is contacted with water, rare metals method of recovering from rare metals-containing glass according to (1) to extract rare metals contained in the rare metals-containing precipitates in water, and
(3) The method for recovering a rare metal from the rare metal-containing glass according to (1) or (2) above, wherein the raw material of the rare metal contained in the rare metal-containing glass is a waste containing a rare metal .

Claims

A method for recovering rare metal from rare metal-containing glass, which is contained in a glass melting agent and rare metal-containing glass in which the amount per 100 parts by mass of silicon dioxide contained in the rare metal-containing glass in a closed system is 30 to 500 parts by mass. The rare metal-containing glass obtained by melting the rare metal-containing glass by heating to a temperature of 900 to 1100 ° C. in the presence of a heavy metal oxide whose amount per 100 parts by mass of silicon dioxide is 30 to 200 parts by mass. Cooling the melt to a temperature of 600 to 800 ° C. while bringing carbon monoxide gas into contact with the melt, and depositing the rare metal-containing precipitate by maintaining the temperature, and collecting the rare metal-containing precipitate A method for recovering rare metal from rare metal-containing glass.

The method for recovering rare metal from a rare metal-containing glass according to claim 1, wherein the collected rare metal-containing precipitate is brought into contact with water, and the rare metal contained in the rare metal-containing precipitate is extracted into water.

The method for recovering a rare metal from the rare metal-containing glass according to claim 1 or 2, wherein the raw material of the rare metal contained in the rare metal-containing glass is a waste containing a rare metal.