Results 31 to 40 of about 27,715 (138)

A simulation and experimental study of bottomhole flow field in a large-diameter rescue borehole

Meitian dizhi yu kantan
ObjectiveIn mine rescue, reaming using a large-diameter down-the-hole (DTH) hammer faces is challenged by complex bottomhole flow fields and difficult slag discharge. This study aims to address these challenges. MethodsTo reveal the influence patterns of
Yan ZHAO, Songhe LIU, Shijun HAO, Jiangpeng ZHAO, Peishu LI, Xuebo WANG, Yongping YU, Ke GAO, Bo DONG, Bo ZHANG   +9 more
doaj   +1 more source

Basic characteristics and starting mode of debris flow in Tieshanzhang Mining Area under typhoon

, 2017
Through field investigation and test, the distribution characteristics, formation conditions, and starting mode of the typical mine debris flow in Tieshanzhang Mining Area were studied, and the density, flow velocity, flow, and other dynamical parameters
Shufang Fan, Yawei Ma, Na Qin
semanticscholar   +1 more source

Numerical Investigation on the Crucible Discharge of Steel and Slag During the Aluminothermic Welding Process

, 2018
The aluminothermic reaction is a type of self-propagating high-temperature synthesis to produce high quality metals and metal oxides en route. The main use of the aluminothermic reaction is in the field of railway welding.
Riehl, I., Weiss, S., Hantusch, J., Gross, U.   +3 more
core   +1 more source

Simulation of Ash Deposition Behavior in an Entrained Flow Coal Gasifier

, 2015
Fly ash deposition is an important phenomenon associated with ash/slag handling and discharge in the entrained-flow coal gasification process. Fouling and slagging inside the gasifier may cause reliability and safety problems because they can impose ...
Xijia Lu, Ting Wang
semanticscholar   +1 more source

Low‐Dimensional Materials and Van Der Waals Heterostructures for Energy Application: A Comprehensive Review

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Low‐dimensional materials (0D, 1D, and 2D) exhibit unique electronic and physicochemical properties, enabling advanced nanoelectronic and optoelectronic devices. Mixed‐dimensional heterostructures combine these materials to enhance functionality.
Qaisar Alam, Sajjad Ali, Pir Muhammad Ismail, ABM Sharif Hossain   +3 more
wiley   +1 more source

Relationship Between Micro‐Level Circular Economy and Sustainable Performance in the Metalworking Industry

Sustainable Development, EarlyView.
ABSTRACT The large multinational metalworking industry has increasingly adopted micro‐level circular economy (MLCE) practices; however, the extent to which these initiatives translate into sustainable performance remains insufficiently understood. This study examines the relationship between MLCE and economic, environmental, and social performance ...
Paulo Caracciolo, Plinio Centoamore, Thadeu Alfredo Farias Silva, Henrricco Nieves Pujol Tucci, Dirceu da Silva, Geraldo Cardoso de Oliveira Neto   +5 more
wiley   +1 more source

Enhancing durability of steam‐cured precast concrete culverts using SCMs: A comparative study with delithiated beta spodumene

Structural Concrete, EarlyView.
Abstract Steam curing is commonly used to manufacture precast culverts to accelerate early strength development. This study investigates the effect of supplementary cementitious materials (SCMs) on the permeability properties of steam‐cured precast concrete culverts.
Saugat Humagain, Prabir Kumar Sarker, Faiz Uddin Ahmed Shaikh, Daksh Baweja   +3 more
wiley   +1 more source

Bridging the Late Antique Gap in Northwest Arabia: New Archaeological Evidence on the Occupation of Wādī al‐Qurā (al‐ʿUlā [AlUla], Saudi Arabia) Between the Third and Seventh Centuries CE

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT In 2019, the Dadan Archaeological Project (CNRS/RCU/AFALULA) identified a Late Antique village 1 km south of ancient Dadan in the al‐ʿUlā valley (northwest Saudi Arabia). Three excavation seasons at this site (2021–2023) have uncovered a massive building constructed in the late third or early fourth cent.
Jérôme Rohmer, Abdulrahman Alsuhaibani, Charlène Bouchaud, Elora Chambraud, Vladimir Dabrowski, Hatem Djerbi, Fabien Lesguer, Hervé Monchot, Paul Picavet, Louise Purdue, Bertrand Riba, Shadi Shabo   +11 more
wiley   +1 more source

Recent Advances in Boron Removal From Geothermal Waters: A Review

Water and Environment Journal, EarlyView.
This review provides a comprehensive overview of boron removal technologies from geothermal fluids and highlights the limitations of conventional treatment methods. Ion exchange, hybrid processes and membrane filtration are identified as the most dominant approaches in recent studies.
Saadet Acar Can, Hasan Koseoglu
wiley   +1 more source

Loading performance of web-type drum for shearer

Meitan kexue jishu
Aiming at the low loading efficiency of the 1.6 m shearer drum under complex coal seam conditions, this study breaks through the bottleneck of loading efficiency through structural innovation and proposes a structural optimization scheme for a web-type ...
Qingliang LI, Ning JIANG, Ying YU, Qiulai HUANG, Weipeng XU, Ziyao MA, Dongyu LIU   +6 more
doaj   +1 more source