scholarly journals Investigation of Dye Removal Capability of Blast Furnace Slag in Wastewater Treatment

2021 ◽  
Vol 13 (4) ◽  
pp. 1970
Author(s):  
Sara Yasipourtehrani ◽  
Vladimir Strezov ◽  
Tao Kan ◽  
Tim Evans
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Industrial Wastewater ◽  
Dye Removal ◽  
Treatment Time ◽  
Activated Carbons ◽  
Industrial Applications ◽  
Ore Processing ◽  
Pre Treatment ◽  
Furnace Slag

Blast Furnace Slag (BFS) is a by-product of the iron ore processing industry with potential to be used in different industrial applications. In this research, BFS was used to examine its ability for dye removal from wastewater. The efficiency of two types of BFS samples for removal of cationic methylene blue (MB) and acidic methyl orange (MO) dyes was investigated and results found that the optimal conditions for treatment of wastewater were 80 g/L of adsorbent dose and 1 h of treatment time for both dyes. BFS was found to be more effective for removal of the acidic MO dye than the cationic MB dye. Under shorter residence times, the results showed reverse trends with BFS samples removing higher concentrations of MB than MO. The BFS chemistry had additional impacts on the efficiency of dye removal. Higher basicity of BFS had lower dye removal ability for adsorption of acidic dye when applied at smaller concentrations, while for cationic dye when applied at higher concentrations. The results showed that BFS has potential role for pre-treatment of industrial wastewater contaminated with dyes and may contribute to reduced use of more expensive adsorbents, such as activated carbons.

Carbothermic Reduction of Titanium-Bearing Blast Furnace Slag

2016 ◽  
Vol 35 (3) ◽  
pp. 309-319 ◽  
Author(s):  
Yu-Lan Zhen ◽  
Guo-Hua Zhang ◽  
Kuo-Chih Chou
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Carbothermic Reduction ◽  
Treatment Time ◽  
Reduction Rate ◽  
Isothermal Treatment ◽  
Reduction Temperature ◽  
X Ray Diffraction ◽  
Iron And Steel ◽  
Furnace Slag

AbstractThe carbothermic reduction experiments were carried out for titanium-bearing blast furnace slag in Panzhihua Iron and Steel Company in argon atmosphere at high temperatures. The effects of reduction temperature, isothermal treatment time and carbon content on the formation of TiC were studied by X-ray diffraction (XRD) and scanning electron microscope (SEM). The XRD pattern results showed that MgAl2O4 phase disappeared and the main phase of the reduced sample was TiC when the reduction temperature was higher than 1,773 K. The SEM pictures showed that the reduction rate of the titanium-bearing blast furnace slag could be increased by enhancing the temperature and the C content (carbon ratio ≤1.0). Furthermore, it was also found that TiC had the tendency of concentrating around the iron. The effects of additives such as Fe and CaCl2 on the formation of TiC were also studied in the present study.

scholarly journals Preparation of filter by alkali activation of blast furnace slag and its application for dye removal

2021 ◽  
pp. 107051
Author(s):  
M.A.H. Bhuyan ◽  
R.K. Gebre ◽  
M.A.J. Finnilä ◽  
M. Illikainen ◽  
T. Luukkonen
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Dye Removal ◽  
Alkali Activation ◽  
Furnace Slag

scholarly journals Optimizing the Acid Resistance of Concrete with Granulated Blast-Furnace Slag

2018 ◽  
Vol 199 ◽  
pp. 02001
Author(s):  
Rolf Breitenbücher ◽  
Jan Bäcker ◽  
Sebastian Kunz ◽  
Andreas Ehrenberg ◽  
Christian Gerten
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Acid Resistance ◽  
Industrial Applications ◽  
Acid Attack ◽  
Dense Microstructure ◽  
Granulated Blast Furnace Slag ◽  
Acid Type ◽  
The Matrix ◽  
Furnace Slag

Concrete for agricultural or industrial applications is often subject to intense acid attack. Most affected structures are sewage structures and biogas plants, natural draught cooling towers or silage silos. Widely independent from acid type, in most cases the acid attack on concrete runs the same way, starting with dissolution of easily soluble calcareous phases like calcium hydroxide. With ongoing attack, calcium-silicate-hydrate crystals (CSH) are also affected by acidic media. In contrast, siliceous phases like silicon-dioxide (SiO2) are widely unaffected by acid attack. While the dissolution of the matrix is increasing with ongoing attack, quarzitic aggregates remain unchanged. Beside the use of coarse SiO2-aggregates, the resistance against acid attack is mainly increased by a minimization of the porosity. For this purpose on one hand, a low water/cement-ratio has to be sought, on the other hand also the fines should be distributed with an optimized grading curve (e.g. Fuller-principle). In practice, this results in a combination of various fine and ultra-fine components, e.g. fly ash, GGBS, silica fume or metakaolin. Such binder compositions lead to a particularly dense microstructure, especially at pore sizes below 1 micron, and a higher chemical resistance due to a lower Ca(OH)2 content. This paper gives an overview on typical acid-resistant concretes, most common applications as well as the effects of the related acid attack and points out the potential of granulated blast furnace slag addition to such concretes.

Immobilization of chromite ore processing residue with alkali-activated blast furnace slag-based geopolymer

2016 ◽  
Vol 42 (8) ◽  
pp. 9538-9549 ◽  
Author(s):  
Xiao Huang ◽  
Tao Huang ◽  
Shan Li ◽  
Faheem Muhammad ◽  
Guojing Xu ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Chromite Ore Processing Residue ◽  
Chromite Ore ◽  
Ore Processing ◽  
Furnace Slag ◽  
Alkali Activated

Study on the Shrinkage of a Full-Scale Wall Made with Blast Furnace Slag Fine Aggregates

CONCREEP 10 ◽  
2015 ◽  
Author(s):  
Tomiyuki Kaneko ◽  
Keiichi Imamoto ◽  
Chizuru Kiyohara ◽  
Akio Tanaka ◽  
Ayuko Ishikawa
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Full Scale ◽  
Fine Aggregates ◽  
Furnace Slag
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