Vitrification of hazardous Fe-Ni wastes into glass-ceramic with fine crystalline structure and elevated exploitation characteristics

被引：39

作者：

Karamanov, Alexander ^{[1
]}

Paunovic, Perica ^{[2
]}

Ranguelov, Bogdan ^{[1
]}

Ljatifi, Ejup ^{[2
]}

Kamusheva, Alexandra ^{[1
]}

Nacevski, Goran ^{[2
]}

Karamanova, Emilia ^{[1
]}

Grozdanov, Anita ^{[2
]}

机构：

[1] Bulgarian Acad Sci, Inst Phys Chem, Sofia, Bulgaria

[2] SS Cyril & Methodius Univ, Fac Technol & Met, Skopje, Macedonia

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2017年 / 5卷 / 01期

关键词：

Iron-reach glass-ceramic; Structure; Pyroxenes; Mechanical properties; IRON; CR2O3; SOLUBILITY; NUCLEATION; CHROMIUM; MUNICIPAL; BEHAVIOR; OXIDE;

D O I：

10.1016/j.jece.2016.12.020

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Hazardous residues from ferronickel smelting plant are mixed with glass cullet and are vitrified for 2 h at 1400 degrees C. The obtained glass is characterized with a very high crystallization trend. As a result, it is inappropriate for sinter-crystallization, but a fine crystalline glass-ceramic can be obtained by bulk crystallization after short heat-treatment at low temperatures. Due to the presence of 1.5 wt.% chromium oxide in the parent glass, together with high amounts of iron oxides and magnesium oxides, the crystallization process is peculiar. It starts during the melt cooling with the precipitation of preliminary Fe-Mg-Cr spinel crystals, which then act as centers for further epitaxial growth of pyroxene phase. It is also highlighted that, due to liquid-liquid immiscibility, the main amorphous phase is characterized by a nonhomogeneous binodal structure, which becomes finer after the nucleation treatment. As a result, pyroxenes with sizes below 1 mm are formed as main crystal phase after the crystallization step. Notwithstanding of the high amount of hazardous wastes in the batch the obtained glass is characterized with high chemical durability. At the same time, the obtained glass-ceramics is characterized by a suitable coefficient of thermal expansion and attractive mechanical characteristics. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：432 / 441

页数：10

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