Results 51 to 60 of about 309,554 (217)
Deep Underground Science and Engineering, EarlyView.This study proposes an eco‐friendly coal permeability enhancement technique by utilizing mine waste gangue as an abrasive in high‐pressure water jets. Integrating erosion experiments with smoothed particle hydrodynamics‐finite element method coupled simulations, the research study elucidates the flow field dynamics and a nonlinear solid–liquid ...
Qingxiang Wang +4 more
wiley +1 more source
Research on Recognition of Coal and Gangue Based on Laser Speckle Images
Sensors, 2023 Coal gangue image recognition is a critical technology for achieving automatic separation in coal processing, characterized by its rapid, environmentally friendly, and energy-saving nature.
Hequn Li +5 more
doaj +1 more source
Energy Science &Engineering, EarlyView.As the sublevel height increases, the top‐coal recovery amount gradually increases, but both the top‐coal recovery rate and the thickened top‐coal recovery rate show a downward trend, and the decline in the top‐coal recovery rate is gradually increasing. The comparison indicates that the optimal sublevel height is 20 m.
Hongsheng Tu +4 more
wiley +1 more source
steel research international, EarlyView.Commercial iron ore sinter is reduced isothermally under operation‐derived radial blast furnace gas atmospheres with and without 20 kg H2/tHM injection. Hydrogen improves reduction at 900–1100 °C, whereas at 700 °C the high H2O content limits the wüstite‐to‐iron driving force.
Ahmed Abdelrahim +5 more
wiley +1 more source
A Study of Multispectral Technology and Two-Dimension Autoencoder for Coal and Gangue Recognition
IEEE Access, 2020 Coal is one of the main sources of human energy. In the process of coal mining, separating gangue from coal has great significance for environmental protection and energy conservation.
Wenhao Lai +4 more
doaj +1 more source
Study on oxidation characteristics of coal gangue with different moisture content under water immersion drying [PDF]
Coal gangue, which accumulates in the open air, is modified by immersion in rain, and exhibits different tendencies to spontaneous combustion in different areas of precipitation.
Jing ZHANG +6 more
core +1 more source
Thermodynamics and Kinetics of Ammonia‐Based Reduction of Natural Hematite
steel research international, EarlyView.Ammonia is investigated as a carbon‐free hydrogen carrier for reducing natural hematite into metallic iron. Higher temperature and smaller particle size promote faster reduction, while ammonia dissociation generates hydrogen that indirectly drives the reduction reaction. At 850 °C, high reduction degrees and porous metallic iron structures are achieved,
Medard Turyasingura +4 more
wiley +1 more source
Microstructure of Coal Gangue and Precipitation of Heavy Metal Elements
, 2017 The microstructure and mineral composition of the gangue play a decisive role in the precipitation of heavy metal elements. In this study, the microstructure, mineral composition, and precipitation of heavy metal elements of coal gangue with different ...
Qiang Sun +5 more
core +1 more source
Research Progress on Preparation of Geopolymer Grouting Material from Coal Gangue
, 2022 Geopolymer grouting material is a new kind of grouting material. The usage of coal gangue as raw material to prepare geopolymer grouting material can effectively solve the accumulation of coal gangue.
Yanjun Wang +6 more
core +1 more source
Energy Science &Engineering, Volume 14, Issue 10, Page 4927-4943, October 2026.This study addresses hard roof coal seam conditions by optimizing key stratum blasting‐cutting parameters through theoretical analysis, numerical simulation, and field tests. It proposes calculation methods for blast hole spacing and delay timing based on stress wave theory, controlling roadway deformation within 35 mm, thereby enhancing resource ...
Qiong Liu, Duanxiang Fu, Hongbin Li
wiley +1 more source