Results 81 to 90 of about 1,612 (205)

Mullite production by valorization of a hydrodesulphurization catalyst waste

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
Due to its high alumina and silica content, Ni–Mo catalyst waste is a suitable, amorphous raw material for producing aluminosilicate phases. Thermal treatment of the waste at 1200°C for 30 min yields a material containing 50 wt.% mullite and exhibiting 96% overall crystallinity. The addition of amorphous silica significantly enhances mullite formation:
Rafael Carrizosa, Agenor De Noni Jr., Aurora López‐Delgado, Isabel Padilla, Maximina Romero   +4 more
wiley   +1 more source

Accurate identification method of coal and gangue based on geometric feature constraints by DE-XRT

Meitan kexue jishu
The dual energy X-ray transmission identification of coal gangue still faces challenges in thickness, hardening, afterglow, and fan-shaped effects, among which the parameters for 5-150 mm wide thickness coal gangue separation fluctuate significantly and ...
Lei HE, Yongcun GUO, Ya ZHI, Shuang WANG, Deyong LI, Kun HU, Gang CHENG   +6 more
doaj   +1 more source

Study on Coal Gangue Identification Based on Vibration and Its Adaptability to Coal-Caving Process Parameters

Shock and Vibration, 2023
The broken top coal and gangue in the fully mechanized cave mining will be released from the rear of the hydraulic support in the form of bulk. In this process, the medium properties through the coal opening can be judged by monitoring the vibration ...
Lirong Wan, Jiantao Wang, Dejian Ma, Zhaoji Li, Zhenguo Lu, Zhaosheng Meng   +5 more
doaj   +1 more source

Coal gangue image recognition model based on improved U−Net and top coal caving control [PDF]

Coal gangue identification technology is a critical component for the automation of fully mechanized mining faces and represents a significant challenge within this domain.
Libao LI, Rang WU, Yong LI, Yong YUAN, Yongqi XIA, Zhenghan QIN   +5 more
core   +1 more source

Research on Mechanical Response Mechanisms of Interlayer Rock Strata in Closely Spaced Coal Seam Mining

Advances in Civil Engineering, Volume 2026, Issue 1, 2026.
Closely spaced coal seams holds significant importance in global energy development, as the mechanical response mechanism of interlayer rock strata directly governs roadway deformation and stress concentration levels. This study investigates the impact of bearing structures within interlayer strata on the stability of surrounding rock during closely ...
Yuancheng Pei, Pucheng Rui, Fengyuan Lv, Wenyue Qi, Qiming Wei, Xiaolong Sun   +5 more
wiley   +1 more source

Image recognition method of coal gangue in complex working conditions based on CES-YOLO algorithm [PDF]

Aiming at the complex working conditions environmental factors such as high noise, low illumination, motion blur and mass gangue mixing in coal mines, which lead to the problems of misdetection, omission and low detection accuracy in gangue recognition ...
Deyong LI, Guofa WANG, Shuang WANG, Yongcun GUO, Yuhao YANG   +4 more
core   +1 more source

Research on the DAS Recognition Method for Blockages in Long‐Distance Downhole Backfilling Pipelines of Goaf Coal Gangue Slurry

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
Against the background of the continuous expansion of deep coal mining scale, goaf stability control and gangue disposal have become key issues restricting the safe and efficient advancement of engineering projects. The underground goaf gangue slurry backfilling technology, as a core method for gangue disposal in deep mining, not only fundamentally ...
Gu Wenzhe, Zhang Dingding, Sheng Fengtian, Wang Ziming, Qiu Fengqi, Tong Liang, Wu Yuyi, Chai Jing, Deepali   +8 more
wiley   +1 more source

Use of Remote Sensing for Mapping and Evaluation of Mining Waste Anomalies at National to Multi-Country Scale. A Case Study to Integrate Remote Sensing Information with Thematic Data Layers and National Inventories on Mining Features in Pre-Accession ... [PDF]

, 2004
not availableJRC.H-Institute for environment and sustainability ...
MEHL Wolfgang, SOMMER Stefan rolf, VIJDEA A. m.   +2 more
core  

Lanthanide Sulfate Recovery by Synergistic Dimethyl Ether and Na2SO4 Fractional Crystallization

ChemSusChem, Volume 18, Issue 24, December 13, 2025.
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

Battery‐Grade Lithium Materials: Virgin Production and Recycling, a Techno‐Economic Comparison

Advanced Energy Materials, Volume 15, Issue 46, December 9, 2025.
With this study a framework has been created to analyze new innovative lithium compound manufacturing processes for their cost and environmental competitiveness. This analysis includes details on virgin and recycled pathways to produce lithium carbonate or lithium hydroxide monohydrate.
Sabine M. Gallagher, Nighat A. Chowdhury, Qiang Dai, Jeffrey S. Spangenberger   +3 more
wiley   +1 more source