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ÈçÌ⣬ÎÄÕÂÃû£ºRemoval of Lead From Cathode Ray Tube Funnel Glass By Generating The Sodium Silicate
          ×÷Õߣº        Biao Hu, Shuangshuang Zhao, Shuhao Zhang.
          ÔÓÖ¾£ºJournal of the Air & Waste Management Association£¬2015,65(1):106~114.

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Removal of lead from cathode ray tube funnel glass by generating the sodium silicate

×÷Õß:Hu, B (Hu, Biao)[ 1 ] ; Zhao, SS (Zhao, Shuangshuang)[ 1 ] ; Zhang, SH (Zhang, Shuhao)[ 1 ]

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION

¾í: 65

ÆÚ: 1

Ò³: 106-114

DOI: 10.1080/10962247.2014.976721

³ö°æÄê: 2015

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In the disposal of electronic waste, cathode ray tube (CRT) funnel glass is an environmental problem of old television sets. Removal of the lead from CRT funnel glass can prevent its release into the environment and allow its reuse. In this research, we reference the dry progress productive technology of sodium silicate, the waste CRT glass was dealt with sodium silicate frit melted and sodium silicate frit dissolved. Adding a certain amount of Na2CO3 to the waste CRT glass bases on the material composition and content of it, then the specific modulus of sodium silicate frit is obtained by melting progress. The silicon, potassium and sodium compounds of the sodium silicate frit are dissolved under the conditions of high temperature and pressure by using water as solvent, which shows the tendency that different temperature, pressure, liquid-solid ratio and dissolving time have effect on the result of dissolving. At 175 degrees C(0.75MPa), liquid-solid ratio is 1.5:1, the dissolving time is 1h, the dissolution rate of sodium silicate frit is 44.725%. By using sodium sulfide to separate hydrolysis solution and to collect lead compounds in the solution, the recovery rate of lead in dissolving reached 100% and we can get clean sodium silicate and high purity of lead compounds. The method presented in this research can recycle not only the lead but also the sodium, potassium and other inorganic minerals in CRT glass and can obtain the comprehensive utilization of leaded glass.
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KeyWords Plus:MECHANICAL ACTIVATION; CRT GLASS; RECOVERY; CERAMICS; DISPOSAL
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ͨѶ×÷ÕßµØÖ·: Hu, B (ͨѶ×÷Õß)
[ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ]         Tianjin Univ Technol, Sch Environm Sci & Safety Engn, Tianjin 300384, Peoples R China.

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[ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ]         [ 1 ] Tianjin Univ Technol, Sch Environm Sci & Safety Engn, Tianjin 300384, Peoples R China

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Èë²ØºÅ: WOS:000346647400011

PubMed ID: 25946963

ISSN: 1096-2247

eISSN: 2162-2906
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С˫ssigg: ½ð±Ò+20, ¡ï¡ï¡ïºÜÓаïÖú 2015-09-08 20:18:09
Removal of lead from cathode ray tube funnel glass by generating the sodium silicate
×÷Õß:Hu, B (Hu, Biao)[ 1 ] ; Zhao, SS (Zhao, Shuangshuang)[ 1 ] ; Zhang, SH (Zhang, Shuhao)[ 1 ]
JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
¾í: 65  ÆÚ: 1  Ò³: 106-114
DOI: 10.1080/10962247.2014.976721
³ö°æÄê: 2015
²é¿´ÆÚ¿¯ÐÅÏ¢
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In the disposal of electronic waste, cathode ray tube (CRT) funnel glass is an environmental problem of old television sets. Removal of the lead from CRT funnel glass can prevent its release into the environment and allow its reuse. In this research, we reference the dry progress productive technology of sodium silicate, the waste CRT glass was dealt with sodium silicate frit melted and sodium silicate frit dissolved. Adding a certain amount of Na2CO3 to the waste CRT glass bases on the material composition and content of it, then the specific modulus of sodium silicate frit is obtained by melting progress. The silicon, potassium and sodium compounds of the sodium silicate frit are dissolved under the conditions of high temperature and pressure by using water as solvent, which shows the tendency that different temperature, pressure, liquid-solid ratio and dissolving time have effect on the result of dissolving. At 175 degrees C(0.75MPa), liquid-solid ratio is 1.5:1, the dissolving time is 1h, the dissolution rate of sodium silicate frit is 44.725%. By using sodium sulfide to separate hydrolysis solution and to collect lead compounds in the solution, the recovery rate of lead in dissolving reached 100% and we can get clean sodium silicate and high purity of lead compounds. The method presented in this research can recycle not only the lead but also the sodium, potassium and other inorganic minerals in CRT glass and can obtain the comprehensive utilization of leaded glass.
¹Ø¼ü´Ê
KeyWords Plus:MECHANICAL ACTIVATION; CRT GLASS; RECOVERY; CERAMICS; DISPOSAL
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ͨѶ×÷ÕßµØÖ·: Hu, B (ͨѶ×÷Õß)
ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ        Tianjin Univ Technol, Sch Environm Sci & Safety Engn, Tianjin 300384, Peoples R China.
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ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ        [ 1 ] Tianjin Univ Technol, Sch Environm Sci & Safety Engn, Tianjin 300384, Peoples R China
µç×ÓÓʼþµØÖ·:hubiaomail@126.com
»ù½ð×ÊÖúÖÂл
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TAYLOR & FRANCIS INC, 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
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Ñо¿·½Ïò:Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
Web of Science Àà±ð:Engineering, Environmental; Environmental Sciences; Meteorology & Atmospheric Sciences
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ÎÄÏ×ÀàÐÍ:Article
ÓïÖÖ:English
Èë²ØºÅ: WOS:000346647400011
PubMed ID: 25946963
ISSN: 1096-2247
eISSN: 2162-2906
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Impact Factor (Ó°ÏìÒò×Ó): Journal Citation Reports®
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