Results 31 to 40 of about 45,269 (168)

Research methodology in montanistic tourism [PDF]

, 2017
Research methodology in montanistic tourism involves the archival research and study of special literature, surface and underground field survey, the analysis of findings of rock fragments, mineral composition, traces of metallurgical processes ...
Schejbal, Ctirad
core  

Lanthanide Sulfate Recovery by Synergistic Dimethyl Ether and Na2SO4 Fractional Crystallization

ChemSusChem, EarlyView.
This work demonstrates synergistic lanthanide salt recovery from an aqueous magnet leachate to single ppm concentrations using Na2SO4 combined with dimethyl ether crystallization. This waste valorization process minimizes chemicals consumed and waste generated while maximizing the recovery of a critical material product. Lanthanides (Lns) are important
Chloe Tolbert, Caleb Stetson, Denis Prodius, Christopher Orme, David Appy, Ikenna Nlebedim, Aaron D. Wilson   +6 more
wiley   +1 more source

Mechanical property variation mechanisms of granite subjected to real‐time high temperatures and subsequent cooling treatment

Deep Underground Science and Engineering, EarlyView.
This study investigates the coupled thermo‐mechanical behavior of granite during heating and cooling through a combination of laboratory tests and finite element analysis. The thermal conductivity, mineral composition, mass loss rate, micro‐crack observation, and thermal fracture characteristics of granite under various temperature conditions are ...
Rui Pang, Dehao Meng, Thomas Frühwirt, Hao Liu, Yanan Zhao, Qingyou Zhu, Wengang Dang, Mohamed Ismael, Fei Wang   +8 more
wiley   +1 more source

Leakage risk assessment system for salt cavern hydrogen storage

Deep Underground Science and Engineering, EarlyView.
Establishment of a leakage risk evaluation system for salt cavern hydrogen storage reservoirs using the entropy weight method plus two‐dimensional cloud modeling approach. Abstract Salt cavern hydrogen storage (SCHS) is an important component of large‐scale underground hydrogen storage, with advantages such as large hydrogen storage capacity and ...
Weizheng Bai, Xilin Shi, Shijie Zhu, Xinxing Wei, Yashuai Huang   +4 more
wiley   +1 more source

Beneficiation of concentrated ultrafine suspensions with a Falcon UF concentrator [PDF]

, 2011
Falcon concentrators are enhanced gravity separators designed for concentrating fine particles. The Falcon UF model is unique in that it is dedicated to beneficiation of ultrafines, one key feature being that it does not make use of any fluidization ...
Bourgeois, Florent, Climent, Éric, Kroll-Rabotin, Jean-Sébastien   +2 more
core  

Acoustic Emission Time–Frequency Characteristics and Response Mechanism of Damaged Sandstone Under the Influence of Lithology

Energy Science &Engineering, EarlyView.
ABSTRACT Coal seam mining will inevitably cause damage to overlying rock structure, and then affect mine safety production, and even surface ecological environment. This study investigates two types of damaged sandstone samples, prepared through cyclic loading–unloading and uniaxial compression tests.
Zhaohan Zhang, Liming Yin, Dongxiao Zhang, Shudong He, Dongmei Huang, Ruijie Zhang, Lianchun Li, Lipeng Zhang   +7 more
wiley   +1 more source

Analysis of rheological behaviour of titanium feedstocks formulated with a water-soluble binder system for powder injection moulding [PDF]

, 2014
Binder selection and formulation are critical in powder injection moulding. Binders play a key role in controlling the rheological properties of a feedstock and influence whether the resulting feedstock can be successfully injection moulded, debound and ...
Cao, Peng, Pickering, Kim L., Swan, Janis E., Thavanayagam, Gnanavinthan   +3 more
core   +2 more sources

A Lightweight YOLOv7‐Based Algorithm for Detecting Foreign Objects on Coal Conveyors

Energy Science &Engineering, EarlyView.
During the coal mining, large foreign objects may block coal conveyors, leading to a series of safety accidents. The existing models for detecting foreign objects in coal conveyors perform poorly in low‐light environments, resulting in false or missed detections of foreign objects.
Zhang Mei, Sun Zilong, Zhang Yifan
wiley   +1 more source

Toward Zero Waste Mining: Circular Economy of Copper Slags

Global Challenges, EarlyView.
Mining and metal extraction processes generate over 90% of global waste. With the rapid increase in population and urbanization, the demand for geotechnical applications and construction materials constantly increases and can absorb the entire quantity of slags generated.
Aleksandar Mitrašinović, Željko Kamberović, Dawei Yu   +2 more
wiley   +1 more source

Estimation of capital and operation costs of backhoe loaders

, 2011
Accurate estimation of equipment costs is a key factor in feasibility study and evaluation of design alternatives of mining projects. In this paper, capital and operation costs of backhoe loaders are estimated using multiple linear regression (MLR ...
Lashgari, A, Oraee, B, Sayadi, AR
core