Results 41 to 50 of about 64,749 (299)

MINERAL COMPOSITION OF PROCESSING WASTES OF TITANOMAGNETITE ORES FROM THE KUSA DEPOSIT (SOUTH URALS) [PDF]

Минералогия, 2016
The dumps of processing wastes (tales) of titanomagnetite ores from the Kusa deposit located in the southwestern margin of the settlement of Magnitka, Chelyabinst district (South Urals) began to form in 1948.
V.I. Popova, V.A. Popov, V.A. Muftakhov, V.A. Kotlyarov   +3 more
doaj  

Application of artificial neural network and general machine learning modelling on CO2 adsorption in moisture equilibrated South African high and medium rank coals

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study investigates the effect of moisture on CO2 adsorption in South African coals using both experimental and machine learning approaches. Three coal samples (SL, TN, and EM) with varying ranks (RoVmr: 3.49%, 1.26%, and 0.64%, respectively) were collected from different regions of South Africa.
Kasturie Premlall, Lawrence Koech, Douw Faurie, Khanyisile Lepota   +3 more
wiley   +1 more source

MINERAL COMPOSITION OF ORE CLASTS OF THE NOVY SHEMUR MASSIVE SULFIDE DEPOSIT, NORTH URALS [PDF]

Минералогия, 2018
The features of mineral composition are considered for clastic ores composing the main part of rich Cu-Zn ores of the Novy Shemur massive sulfide deposit, North Urals.
N.P. Safina, N.R. Ayupova, A.S. Tseluyko, K.A. Filippova   +3 more
doaj  

Purification of Li2CO3 Obtained through Pyrometallurgical Treatment of NMC Black Mass from Electric Vehicle Batteries

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
Lithium carbonate (Li2CO3) obtained from the black mass of recycled lithium batteries is dissolved in water under controlled conditions to remove lithium fluoride (LiF), which is present at a concentration of 3.08 % by weight. The dissolution is carried out at temperatures below 10 °C, and it has been demonstrated that lower temperatures result in ...
Laura Rosso, Lorena Alcaraz, Olga Rodríguez‐Largo, Félix A. López   +3 more
wiley   +1 more source

MINERALOGY OF THE OVERBURDEN ROCKS OF THE KOKLAN W-MO DEPOSIT (SOUTH URALS) [PDF]

Минералогия, 2015
The Koklan W-Mo deposit is overlapped by Mesozoic-Cenozoic rocks 120–140 m thick, which may be subdivided in four members on the basis of variable proportions of the rock-forming minerals (quartz, hydromica (with glauconite), smectites and X-ray ...
E.V. Belogub, K.А. Novoselov, E.E. Palenova, P.V. Khvorov   +3 more
doaj  

Probability prediction of true‐triaxial compressive strength of intact rocks based on the improved PSO‐RVM model

Deep Underground Science and Engineering, EarlyView.
In this work, we propose an improved particle swarm optimization (PSO) algorithm and develop an improved PSO‐relevance vector machine (RVM) model as a substitute for traditional true‐triaxial testing. The model's high prediction accuracy was validated through comparisons with two other machine learning methods and five three‐dimensional Hoek–Brown type
Qi Zhang, Maohui Wang, Ning Wang, Yixin Shen, Xuzhen He   +4 more
wiley   +1 more source

Depth-dependent anisotropy in the Earth’s inner core linked to chemical stratification

Nature Communications
Seismic anisotropy in the Earth’s inner core (IC), including the heterogeneous, depth-dependent anisotropy structure, is a well-documented yet poorly understood feature plausibly related to the alignment of iron alloy crystals. Here, we report the effect
Efim Kolesnikov, Xiang Li, Susanne C. Müller, Arno Rohrbach, Stephan Klemme, Jasper Berndt, Hanns-Peter Liermann, Carmen Sanchez-Valle, Ilya Kupenko   +8 more
doaj   +1 more source

SULFUR ISOTOPIC COMPOSITION OF SULFIDES FROM THE DESTRUCTION PRODUCTS OF PALEOSMOKER FROM THE YUBILEYNOE VHMS DEPOSIT (SOUTHERN URALS) [PDF]

Минералогия, 2015
Variations in sulfur composition of sulfides from fragments of the paleosmoker chimneys, sulfide turbidites, and products of their seafloor alteration are determined.
A.S. Tseluyko, V.V. Maslennikov, N.R. Ayupova, S.A. Sadykov   +3 more
doaj  

Study on the failure mechanism of the shield excavation face in the sandy cobble stratum under different buried depths

Deep Underground Science and Engineering, EarlyView.
Abstract One of the significant challenges faced in shield tunnel construction is the risk of collapse resulting from abrupt changes in soil conditions in advance of the working face, particularly within the sandy cobble stratum. This study aims to effectively manage these sudden variations and to further investigate the failure mechanisms associated ...
Hua Jiang, Chongyang Liu, Ao Zhang, Xiaoyan Zhang, Yuhang Li   +4 more
wiley   +1 more source

The sapphirine-spinel hornblendites of Il’meno-Vishnevogorsky complex

Литосфера, 2017
The authors consolidated disparate information about sapphirine-bearing rocks of the Urals. It is shown that they belong to genetically different entities.
V. G. Korinevsky, E. V. Korinevsky, V. A. Kotlyarov, S. M. Lebedeva, I. A. Blinov, A. B. Mironov, M. B. Shtenberg   +6 more
doaj   +2 more sources