The mineral phase evolution behaviour in the production of glass–ceramics from municipal solid waste incineration fly ash by melting technology
The mineral phase evolution behaviour in the production of glass–ceramics from municipal solid waste incineration fly ash by melting technology
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城市生活垃圾焚烧飞灰熔融技术生产微晶玻璃过程中的矿物相演化行为
DOI：
10.1080/09593330.2015.1098730
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发表时间：
2016-04
影响因子：
2.8
通讯作者：
Agha Saood Khan
中科院分区：
文献类型：
--
作者：
Meiyun Chai;Rundong Li;Pengfei Yao;Agha Saood Khan
摘要高能耗是熔融法处理城市垃圾焚烧飞灰广泛应用的主要障碍。为了降低灰熔融温度（AMT），实现节能降耗，采用差示扫描量热法、X射线衍射法和扫描电镜研究了AMT与矿物演化的关系。结果表明，AMT的变化主要取决于矿物晶体的种类和含量。难熔矿物向助熔矿物的转变是关键。主晶相由假硅灰石（Ca 3（Si 3 O 9））向硅灰石（CaSiO 3）的转变对AMT的还原起了重要作用。通过量子化学计算研究了结晶反应活性对AMT的影响。在化学反应中，最高占据分子轨道和最低未占据分子轨道起着比其他轨道更重要的作用。Ca ~（2+）、Mg ~（2+）、Na ~+、K ~+主要通过Si（3）、O（1）、Si（6）、O（10）和Al（2）、O（10）进入硅灰石和钙铝黄长石的晶格，分别破坏Si（3）-O（7）、Al（1）-O（9）和Al（1）-O（15）的共价键。这种解构行为为重组提供了便利条件，促进了助熔矿物的形成。熔体中过量的SiO2单体以方石英和石英的形式存在，导致AMT增加。
ABSTRACT High energy consumption was the major obstacle to the widespread application of melting technology in the treatment of municipal solid waste incineration fly ash. Aiming to lower the ash-melting temperature (AMT) for energy-saving, differential scanning calorimetry, X-ray diffraction and the scanning electron microscope were used to investigate the relations between AMT and the mineral evolution. The results indicated that the change of AMT was determined by the types and the contents of mineral crystals. The transition from refractory minerals to fluxing minerals was the key. The transition of the main crystalline phase from pseudowollastonite (Ca3(Si3O9)) to wollastonite (CaSiO3) played a significant role in AMT reduction. A quantum chemistry calculation was carried out to investigate the effect of crystal reaction activity on AMT. In the chemical reaction, the highest occupied molecular orbital and the lowest unoccupied molecular orbital played a more important role than any other orbits. Cations (Ca2+, Mg2+, Na+, K+) were apt to enter into the crystal lattice of wollastonite and gehlenite mainly through Si (3), O (1), Si (6), O (10) and Al (2), O (10), and broke the covalent bonds of Si (3)–O (7), Al (1)–O (9) and Al (1)–O (15), respectively. This deconstruction behaviour provided convenient conditions for restructuring and promoted the formation of fluxing minerals. In melts, the excess SiO2 monomers which existed in the form of cristobalite and quartz caused AMT increase.
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影响因子：
8.1
作者：
Sukandar;Tri Padmi;Masaru Tanaka;I. Aoyama
通讯作者：
Sukandar;Tri Padmi;Masaru Tanaka;I. Aoyama
影响因子：
5.2
作者：
K. Vasilopoulos;D. Tulyaganov;S. Agathopoulos;M. Karakassides;J. Ferreira;D. Tsipas
通讯作者：
K. Vasilopoulos;D. Tulyaganov;S. Agathopoulos;M. Karakassides;J. Ferreira;D. Tsipas
影响因子：
4.2
作者：
A. Khodadoust;P. Naithani;T. Theis;I. Murarka
通讯作者：
A. Khodadoust;P. Naithani;T. Theis;I. Murarka
影响因子：
7.4
作者：
Liu, Bo;He, Qihui;Hu, Baixing
通讯作者：
Hu, Baixing
影响因子：
7.4
作者：
Jiakuan Yang;B. Xiao;A. Boccaccini
通讯作者：
Jiakuan Yang;B. Xiao;A. Boccaccini