Physicochemical property and chromium leaching behavior in different environments of glass ceramics prepared from AOD stainless steel slag

2019 ◽  
Vol 805 ◽  
pp. 1106-1116 ◽  
Author(s):  
Shuai Zhang ◽  
Yanling Zhang ◽  
Zhenmin Qu
Keyword(s):  
Stainless Steel ◽  
Physicochemical Property ◽  
Steel Slag ◽  
Glass Ceramics ◽  
Leaching Behavior ◽  
Stainless Steel Slag

Crystallization mechanism of glass-ceramics prepared from stainless steel slag

Rare Metals ◽  
2018 ◽  
Vol 37 (5) ◽  
pp. 413-420 ◽  
Author(s):  
Wen-Di Fan ◽  
Qiang-Wei Yang ◽  
Bin Guo ◽  
Bo Liu ◽  
Shen-Gen Zhang
Keyword(s):  
Stainless Steel ◽  
Steel Slag ◽  
Glass Ceramics ◽  
Crystallization Mechanism ◽  
Stainless Steel Slag

Microstructural transformation of stainless steel slag-based CAMS glass ceramics prepared by SPS

2021 ◽  
Vol 47 (1) ◽  
pp. 1284-1293
Author(s):  
Saiyu Liu ◽  
Yuxin Chen ◽  
Shunli Ouyang ◽  
Hangren Li ◽  
Xin Li ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Steel Slag ◽  
Glass Ceramics ◽  
Stainless Steel Slag ◽  
Microstructural Transformation

scholarly journals Effect of binary basicity on chromium occurrence in stainless steel slag

2021 ◽  
pp. 43-43
Author(s):  
Q. Zeng ◽  
J.-L. Li ◽  
G.-J. Ma ◽  
H.-Y. Zhu
Keyword(s):  
Stainless Steel ◽  
Steel Slag ◽  
Calcium Content ◽  
Synthetic Slag ◽  
Leaching Behavior ◽  
Stainless Steel Slag ◽  
Comprehensive Utilization ◽  
Precipitation Occurrence ◽  
The Relationship ◽  
Lower Basicity

Comprehensive utilization of stainless-steel slag (SSS) is restrained due to the risk of Cr6+ leaching. Based on the studying the microstructure of synthetic slag (SS) containing Cr2O3with XRD, SEM-EDS?and Image pro, the effect of binary basicity on the chromium occurrence in SSS was investigated. The results indicated that the binary basicity had a significant impact on the properties of spinel crystals. There was a positive correlation between the calcium content in spinel crystals and the SS basicity. The size of spinel crystals varied from large to small and the precipitation occurrence changed with the basicity increase. Furthermore, the chromium occurrences changed with basicity. The chromium was produced in spinel crystals at lower basicity, but as the basicity increased to 3.0, the chromium precipitated as calcium chromate. In view of the relationship between the chromium leaching behavior and its occurrence, increasing basicity raised the Cr6+ leaching.

scholarly journals Occurrence and Leaching Behavior of Chromium in Synthetic Stainless Steel Slag Containing FetO

Minerals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1055
Author(s):  
Qiang Zeng ◽  
Jianli Li ◽  
Yue Yu ◽  
Hangyu Zhu
Keyword(s):  
Stainless Steel ◽  
Crystal Size ◽  
Spinel Phase ◽  
Steel Slag ◽  
Utilization Rate ◽  
Leaching Behavior ◽  
Stainless Steel Slag ◽  
Minimum Concentration ◽  
Edge Structure ◽  
Line Scanning

Stainless steel slag has been applied to other silicate materials due to its CaO-SiO2-based system. This is done to improve the utilization rate of stainless steel slag and apply it more safely. This paper investigated the occurrence of chromium in synthetic stainless steel slag containing FetO and its leaching behavior. The phase composition of the equilibrium reaction was calculated by FactSage 7.3 Equlib module. XRD, SEM-EDS and IPP 6.0 were used to investigate the phase compositions, microstructure and count the size of spinel crystals. The results indicate that the increase of Fe2O3 content can promote the precipitation of spinel phases and effectively inhibit the formation and precipitation of α-C2S in a CaO-SiO2-MgO-Cr2O3-Al2O3-FeO system. Fe2O3 contents increased from 2 wt% to 12 wt%, and the crystal size increased from 4.01 μm to 6.06 μm, with a growing rate of 51.12%. The results of SEM line scanning show the Cr-rich center and Fe-rich edge structure of the spinel phase. Comparing the TRGS 613 standard with the HJ/T 299-2007 standard, the leaching of Cr6+ in the FetO samples is far lower than the standards’ limit, and the minimum concentration is 0.00791 mg/L in 12 wt% Fe2O3 samples.

scholarly journals Experimental Study on Precipitation Behavior of Spinels in Stainless Steel-Making Slag under Heating Treatment

Processes ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 487 ◽  
Author(s):  
Jianli Li ◽  
Qiqiang Mou ◽  
Qiang Zeng ◽  
Yue Yu
Keyword(s):  
Particle Size ◽  
Stainless Steel ◽  
Steel Slag ◽  
Calcium Content ◽  
Heating Time ◽  
X Ray Diffraction ◽  
Stainless Steel Slag ◽  
Steel Making ◽  
Heating Treatment ◽  
The Stability

The stability of chromium in stainless steel slag has a positive correlation with spinel particle size and a negative correlation with the calcium content of the spinel. The effect of heating time on the precipitation of spinel crystals in the CaO-SiO2-MgO-Al2O3-Cr2O3-FeO system was investigated in the laboratory. Scanning electron microscopy with energy-dispersive and X-ray diffraction were adopted to observe the microstructure, test the chemical composition, and determine the mineral phases of synthetic slags, and FactSage7.1 was applied to calculate the crystallization process of the molten slag. The results showed that the particle size of the spinel crystals increased from 9.42 to 10.73 μm, the calcium content in the spinel crystals decreased from 1.38 at% to 0.78 at%, and the content of chromium in the spinel crystal increased from 16.55 at% to 22.78 at% with an increase in the heating time from 0 min to 120 min at 1450 °C. Furthermore, the species of spinel minerals remained constant. Therefore, an extension in the heating time is beneficial for improving the stability of chromium in stainless steel slag.

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