THE TREATMENT AND MINIMIZATION OF METALLURGICAL SLAG AS WASTE

2010 ◽  
Vol 9 (1) ◽  
pp. 101-106 ◽  
Author(s):  
Igor Cretescu ◽  
Maria Cioroi ◽  
Licuta Nistor Cristea
Keyword(s):  
Metallurgical Slag

JUSTIFICATION OF THE USE OF METALLURGICAL SLAGS AS A BACKFILL MATERIAL FOR QUARRY CAVITIES

2021 ◽  
pp. 15-25
Author(s):  
Volodymyr Bondarenko ◽  
◽  
Oleksandr Filonenko ◽  
Mykhailo Petlovanyi ◽  
Vladyslav Ruskykh ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Large Scale ◽  
Experimental Studies ◽  
Metallurgical Slag ◽  
Open Pit ◽  
Practical Significance ◽  
Steel Smelting ◽  
Backfill Material ◽  
Steel Making ◽  
Metallurgical Slags

Purpose. Experimental studies of the interaction of blast-furnace and steel-making slags with open pit waters during their direct contact and assessment of the volume of filling of the formed man-made cavities during mining of mineral deposits. Methods. Based on the analysis, the current low level of metallurgical slag and the lack of real and effective directions of their large-scale utilization were determined. The laboratory studies of the interaction of metallurgical slags with open pit water at a certain time of interaction, generally accepted methods for studying the chemical composition and concentration of substances in water, computer-aided design software packages and drawings to determine the volumes of the open pit mined-out area were used. Results. The dynamics of changes in the products of interactions of steel-smelting slags with open-pit waters at a certain ratio and period of interaction was investigated. It was found that the concentration of pollutants upon contact of water with steel-making slag changes according to polynomial dependences on the time of their interaction, decreasing by the 30th day, which eliminates the danger for the aquifer. The safest type of metallurgical slag was recommended for the formation of the bottom layer of the backfill massif. The volumes of the mined-out area of the open pit were determined in detail to assess the volumes of placement of the backfill material based on metallurgical slags. Scientific novelty. The safety of the contact of backfill materials based on steelmaking slags with open pit water was scientifically proven, which is confirmed by the established polynomial patterns of changes in concentrations and pollutants from the ratio and time of interaction. Practical significance. The formation of the backfill massif on the basis of blast-furnace dump and steel-smelting slags will allow achieving an environmental effect, such as their safe disposal as a reclamation of technologically disturbed lands by mining and restoration of the economic value of the land plot, as well as preventing the formation of new dumps.

Research on the Recovery of Copper from Metallurgical Slag

Mining Revue ◽  
2021 ◽  
Vol 27 (3) ◽  
pp. 40-44
Author(s):  
Eugen Traistă ◽  
Camelia Bădulescu ◽  
Maria Lazăr ◽  
Camelia Traistă
Keyword(s):  
Metallurgical Slag ◽  
Industrial Wastes ◽  
Raw Material ◽  
Pollutant Emissions ◽  
Material Base ◽  
Metallurgical Slags ◽  
Slag Processing ◽  
Metallurgical Processes ◽  
Initial Research ◽  
Over Time

Abstract Metallurgical slag is one of the most common industrial wastes. Many of these wastes are not stable over time, by reacting with water and air, continuously generating emissions of heavy metals. Metallurgical slag processing is necessary for at least two reasons: reducing pollutant emissions and broadening the raw material base. The recovery of these slags is very difficult because they are the result of metallurgical processes that aimed to fix metals considered impurities in chemical matrices as stable as possible. This paper presents the initial research on the behavior of metallurgical slags against different leaching technologies.

scholarly journals Enhancing Arsenic Solidification/Stabilisation Efficiency of Metallurgical Slag-Based Green Mining Fill and Its Structure Analysis

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1389
Author(s):  
Wei Gao ◽  
Zifu Li ◽  
Siqi Zhang ◽  
Yuying Zhang ◽  
Pingfeng Fu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Calcium Nitrate ◽  
Outer Sphere ◽  
High Specific Surface Area ◽  
Sodium Sulphate ◽  
Metallurgical Slag ◽  
Hydration Reaction ◽  
Mechanism Analysis ◽  
Low Carbon ◽  
Sphere Complex

To dispose of arsenic-containing tailings with low carbon and high efficiency, sodium sulphate (Na2SO4), sodium hydroxide (NaOH), calcium nitrate Ca(NO3)2 and calcium hydroxide Ca(OH)2 were independently added to metallurgical slag-based binder (MSB) solidification/stabilisation (S/S)-treated tailings (MSTs) to enhance the MST arsenic S/S performance. Results showed that only Ca(OH)2 could increase the unconfined compressive strength of MST from 16.3 to 20.49 MPa and decrease the leachate As concentration from 31 μg/L to below 10 μg/L. Na3AsO4·12H2O and NaAsO2 were used to prepare pure MSB paste for mechanism analysis. The results of microstructure analyses showed the high specific surface area and amorphous properties of calcium–sodium aluminosilicate hydrate facilitated the adsorption or solid-solution formation of As(V) and As(III). As(V) formed an inner-sphere complex in ettringite, whereas As(III) formed an outer-sphere complex, and the relatively larger size and charge of As(V) compared with SO42− restrict substitution inside channels without affecting the ettringite structure under high loading of As(V). The added Ca(OH)2 promoted the hydration reaction of MSBs and facilitated the formation of a Ca–As(V) precipitate with low solubility, from Ca4(OH)2(AsO4)2·4H2O (Ksp = 10−27.49) to Ca5(AsO4)3(OH) (Ksp = 10−40.12). This work is beneficial for the application of cement-free MSB in the S/S process.

Site Specific Isolation of a Metallurgical Slag Dump

1990 ◽  
pp. 1217-1218
Author(s):  
E. Adam ◽  
J. Brauns ◽  
H. Hötzl ◽  
F. Lamm ◽  
U. Ritscher ◽  
...  
Keyword(s):  
Metallurgical Slag ◽  
Site Specific ◽  
Slag Dump

Application of metallurgical slag to treat geothermal wastewater with high concentrations of arsenic and boron

2018 ◽  
Vol 16 (5) ◽  
pp. 2373-2384 ◽  
Author(s):  
B. M. Mercado-Borrayo ◽  
M. Solís-López ◽  
R. Schouwenaars ◽  
R. M. Ramírez-Zamora
Keyword(s):  
Metallurgical Slag ◽  
High Concentrations

Reclamation of Industrial Tailings by Means of Metallurgical Slag

2018 ◽  
Vol 48 (12) ◽  
pp. 789-792
Author(s):  
I. P. Belanov ◽  
N. B. Naumova ◽  
I. S. Semina ◽  
O. A. Savenkov
Keyword(s):  
Metallurgical Slag ◽  
Industrial Tailings
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