Abstract
It is a useful way to stabilize the elements of heavy metal in the glass-ceramics with the form of ions due to the environmental pollution of heavy metal, such as Cr. The glass-ceramics of excellent combination properties were prepared, and the effect of stabilizing Cr-containing stainless steel slag with different concentrations of nitric acid leaching test were investigated. It was found that the major crystalline phase was diopside or anorthite with or without the amount stainless steel slag. Moreover, the continuous refinement of grains exhibited with the increase of amount of stainless steel slag. The results indicated that the excellent physical and mechanical properties, including density (2.9 g/cm3), hardness (729.27HV0.3), bending strength (222.9 MPa), and the solid solution of Cr in excess of 0.00057% for the glass-ceramics were related to the change of microstructure and phase structure. There showed the potential for reusing and detoxifying stainless steel slag.
Highlights
Cr2O3 0.0 0.2 0.5 0.7 0.9 a stable Cr (III) and stabilized in the crystal lattice so as to the stainless steel slag was detoxified
The results indicated that the crystalline phase with diopside structure formed with the addition of stainless steel slag
The glass-ceramics with excellent properties were prepared with the addition of Chromium-containing Stainless Steel Slag, as the additive solid waste, and made the heavy metal element, Cr, solidified in the crystal lattice successfully
Summary
Cr2O3 0.0 0.2 0.5 0.7 0.9 a stable Cr (III) and stabilized in the crystal lattice so as to the stainless steel slag was detoxified. The influence of the presence of chromium containing the different chemical valence state in the crystalline phase were leached by the ratio of crystallized glass on the solidification of chromium using Cr leaching ratio in glass-ceramics[8,11] and, this is better way for studying the solidification mechanism of high performance glass-ceramics for chromium. In view of the above facts, recycling stainless steel slag to obtain glass-ceramics was a kind of product with excellent performance being not harmful to the environment and human body. Chromium-containing stainless steel slag to prepare glass-ceramics of CMAS system with high performance and, at the same time, curing Cr in the crystal structure were studied by the thermal behaviors, crystalline phase, grain shape and size. It is expected that the relationship between the physical and mechanical properties of glass-ceramics and their microstructure feature and phase structure can be revealed
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