Recycling of Vanadium-Containing BOF Slag with Agitation and Heap Leaching

2022 ◽  
Author(s):  
Denis Ordinartsev ◽  
Alexey Krasheninin ◽  
Sofia Petrova ◽  
Olga Gyrdasova
Keyword(s):  
Heap Leaching ◽  
Bof Slag

BOF Slag: Turning Waste Into Value

2019 ◽  
Author(s):  
S. Chatterjee ◽  
K. Konar ◽  
B. Senguttuvan ◽  
A. Maity ◽  
R. N ◽  
...  
Keyword(s):  
Bof Slag

Prospects for increasing the efficiency of the cyanidation of gold with the help of innovative reactors in the technology of heap leaching

2019 ◽  
Vol 7 (27) ◽  
pp. 3-9
Author(s):  
T.V. Chekushina ◽  
◽  
A.V. Yankevsky ◽  
Moussa Koulibaly ◽  
Etienne Haba ◽  
...  
Keyword(s):  
Heap Leaching

SELECTING EFFECTIVE METHODOLOGY OF GEOPHYSICAL CONTROL OVER THE HEAP LEACHING PAD WATERPROOFING INTEGRITY

2018 ◽  
Vol 6 ◽  
pp. 41-49
Author(s):  
A. A. Sias'ko ◽  
◽  
N. N. Grib ◽  
V.S. Imaev ◽  
G.V. Grib ◽  
...  
Keyword(s):  
Heap Leaching

scholarly journals Time-Dependent Strength Behavior, Expansion, Microstructural Properties, and Environmental Impact of Basic Oxygen Furnace Slag-Treated Marine-Dredged Clay in South Korea

2021 ◽  
Vol 13 (9) ◽  
pp. 5026
Author(s):  
Gyeong-o Kang ◽  
Jung-goo Kang ◽  
Jin-young Kim ◽  
Young-sang Kim
Keyword(s):  
Particle Size ◽  
Environmental Impact ◽  
South Korea ◽  
Mechanical Characteristics ◽  
Basic Oxygen Furnace ◽  
Microstructural Properties ◽  
Compression Tests ◽  
Basic Oxygen ◽  
Strength Behavior ◽  
Bof Slag

The aim of this study was to investigate the mechanical characteristics, microstructural properties, and environmental impact of basic oxygen furnace (BOF) slag-treated clay in South Korea. Mechanical characteristics were determined via the expansion, vane shear, and unconfined compression tests according to various curing times. Scanning electron microscopy was conducted to analyze microstructural properties. Furthermore, environmental impacts were evaluated by the leaching test and pH measurements. According to the results, at the early curing stage (within 15 h), the free lime (F-CaO) content of the BOF slag is a significant factor for developing the strength of the adopted sample. However, the particle size of the BOF slag influences the increase in the strength at subsequent curing times. It was inferred that the strength behavior of the sample exhibits three phases depending on various incremental strength ratios. The expansion magnitude of the adopted samples is influenced by the F-CaO content and also the particle size of the BOF slag. Regarding the microstructural properties, the presence of reticulation structures in the amorphous gels with intergrowths of rod-like ettringite formation was verified inside the sample. Finally, the pH values and heavy metal leachates of the samples were determined within the compatible ranges of the threshold effect levels in the marine sediments of the marine environment standard of the Republic of Korea.

scholarly journals Component Modification of Basic Oxygen Furnace Slag with C4AF as Target Mineral and Application

2021 ◽  
Vol 13 (12) ◽  
pp. 6536
Author(s):  
Yanrong Zhao ◽  
Pengliang Sun ◽  
Ping Chen ◽  
Xiaomin Guan ◽  
Yuanhao Wang ◽  
...  
Keyword(s):  
Intermediate Phase ◽  
Raw Materials ◽  
Activity Index ◽  
Basic Oxygen Furnace ◽  
Hydration Products ◽  
Basic Oxygen ◽  
Bof Slag ◽  
Mineral Compositions ◽  
Slag Component ◽  
Basic Oxygen Furnace Slag

In this paper, a new method of basic oxygen furnace (BOF) slag component modification with a regulator was studied. The main mineral was designed as C4AF, C2S and C3S in modified BOF slag, and the batching method, mineral compositions, hydration rate, activation index and capability of resisting sulfate corrode also were studied. XRD, BEI and EDS were used to characterize the mineral formation, and SEM was used to study the morphology of hydration products. The results show that most inert phase in BOF slag can be converted into active minerals of C4AF and C2S through reasonable batching calculation and the amount of regulating agent. The formation of C4AF and C2S in modified BOF slag is better, and a small amount of MgO is embedded in the white intermediate phase, but C3S is not detected. With the increase in the CaO/SiO2 ratio in raw materials, the CaO/SiO2 ratio of calcium silicate minerals in modified BOF slag increases, the contents of f-CaO are less than 1.0%, and the activity index improves. Compared with the BOF slag, the activity index and exothermic rate of modified BOF slag improved obviously, and the activity index of 90 days is close to 100%. With the increase in modified BOF slag B cement, the flexural strength decrease; however, the capability of resisting sulfate corrode is improved due to the constant formation of a short rod-like shape ettringite in Na2SO4 solution and the improvement of the structure densification of the hydration products.

scholarly journals Heap Leaching Simulation

1998 ◽  
Vol 31 (23) ◽  
pp. 43-48
Author(s):  
Sirkka-Liisa Jämsä-Jounela ◽  
Zoltán Cziprián
Keyword(s):  
Heap Leaching

Screening and Isolation of Bacterial Strains with the Biotechnological Potential to Destruct Cyanide-Bearing Compounds under the Conditions of Extreme Continental Climate

2015 ◽  
Vol 1130 ◽  
pp. 19-22
Author(s):  
M.P. Belykh ◽  
S.V. Petrov ◽  
V.F. Petrov ◽  
A.Yu. Chikin ◽  
N.L. Belkova
Keyword(s):  
Microbial Communities ◽  
Gold Mining ◽  
Molecular Genetic ◽  
Heap Leaching ◽  
Bacterial Strains ◽  
Mining Operations ◽  
Biotechnological Potential ◽  
Enriched Cultures ◽  
Continental Climate

The methods of biodegradation are of special interest because they help solving environmental problems of wastes detoxification from gold-mining operations. The use of bacterial strains is a promising approach in the field of biotechnology to destruct cyanide-bearing compounds. The diversity of microbial communities both in heap in situ and in the enriched cultures was studied with molecular genetic methods. The differences in representation of bacteria, cultivated in unexploitable and operating heaps, are territory, site and heap specific. The strains of Pseudomonas sp. and Methylobacterium sp. possess the biotechnological potential and might be used in biodegradation of heap leaching wastes in extreme continental climate.

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