Article
Energy & Fuels
Qiangqiang Qi, Xin Yue, Xin Duo, Zhanjun Xu, Zhe Li
Summary: This study proposes a radial basis function neural network model combined with the ordinary kriging method to predict the spatial distribution of soil organic carbon (SOC) in mining areas. The model considers environmental factors such as topography and vegetation, and shows better prediction accuracy compared to the direct kriging method. The R-2 values obtained by the radial basis artificial neural network are higher than those obtained by the direct kriging method, indicating the effectiveness of the model in improving SOC content prediction in mining areas.
INTERNATIONAL JOURNAL OF COAL SCIENCE & TECHNOLOGY
(2023)
Article
Energy & Fuels
Chengxiao Li, Renshu Yang, Yanbing Wang, Yiqiang Kang, Yuantong Zhang, Pin Xie
Summary: A disperse charge cut blasting method is proposed to address the issues of low excavation depth and high block rate in deep hole undercut blasting. The study shows that using dispersed charge improves the cutting efficiency and rock breakage compared to traditional continuous charge. Important parameters such as cutting hole spacing, cutting hole depth, and upper charge proportion also significantly impact the cutting effect.
INTERNATIONAL JOURNAL OF COAL SCIENCE & TECHNOLOGY
(2023)
Article
Energy & Fuels
Chaolin Zhang, Peizhong Wang, Enyuan Wang, Dapeng Chen, Chao Li
Summary: This study elaborated on the basic situation of coal resources and national mining accidents in China over the past five years (2017-2021) from four dimensions (accident level, type, region, and time), and proposed preventive measures based on accident statistical laws. The results showed that coal resources were mainly concentrated in the Midwest of China, with Shanxi and Shaanxi accounting for about 49.4%. Although the proportion of coal consumption decreased from 70.2% to 56% between 2011 and 2021, coal still accounted for more than half of the total consumption. General accidents had the highest number of accidents and deaths, accounting for 87.6% and 54.64% respectively. The 4 + 4 safety management model was proposed to improve safety measures based on the statistical results and coal production in China.
INTERNATIONAL JOURNAL OF COAL SCIENCE & TECHNOLOGY
(2023)
Article
Energy & Fuels
Di Zhao, Qiang Wu, Yifan Zeng, Juan Zhang, Aoshuang Mei, Xiaohui Zhang, Shuai Gao, Hanyuan Wang, Honglei Liu, Yong Zhang, Shuai Qi, Xu Jia
Summary: Chifeng is a concentrated mining area for non-ferrous metal minerals and a key prevention and control area for heavy-duty enterprises, necessitating an effective ecological and human health risk assessment of heavy metal(loid)s. The study found that the concentrations of Cd, Pb, and As in some soil samples exceeded the environmental quality standards, posing potential ecological and health risks.
INTERNATIONAL JOURNAL OF COAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Hongxin Qiu, Bozeng Wu, Jianhua Chen, Jiushuai Deng, Xiaohao Sun, Mingzhen Hu, Jiaozhong Cai, Zherui Chen, Cheng Zheng, Yijiang Li
Summary: This study investigates the adsorption of DL-cysteine on sphalerite surfaces with varying degrees of Fe substitution. The results show that Fe substitution increases the acidity of the mineral surface, enhancing its reactivity with S, O, and N atoms. DL-cysteine primarily adsorbs onto the Fe ions through interactions with -SH and -NH2 groups. Experimental tests confirm the potential of DL-cysteine as a sphalerite depressant.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
Shulei Li, Jundi Fan, Lihui Gao
Summary: A nitrogen-rich functional group biomass carbon aerogel (NHPA) with high specific surface area was successfully synthesized and applied for the adsorption of gallium from alkaline solution. The results showed that NHPA exhibited excellent adsorption performance over a wide concentration range and had a higher adsorption capacity compared to commercial resin. The adsorption mechanism involved the reactive binding of GaOz with oxygen-/nitrogen- containing functional groups. Electrochemical analysis indicated that NHPA had great electrochemical properties and electrical-assisted adsorption could significantly enhance the adsorption capacity and rate.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
A. I. Boulahbal, L. Santamaria, A. Azizi, M. Boutahala, S. A. Korili, A. Gil
Summary: This study reports for the first time the use of saline slag, a hazardous waste generated during aluminum recycling, as an aluminum source for the synthesis of CuAl layered double hydroxides (LDH). The synthesis pH was found to have a significant effect on the nature of secondary phases, as well as the structure and morphology of the samples.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
Jihao Zhang, Xiaolin Pan, Zhongyang Lv, Haiyan Yu, Ganfeng Tu
Summary: The iron-aluminum symbiotic ore, an important strategic resource, has not been effectively utilized due to the complex relationship between iron-aluminum minerals. This study proposes a low-calcium carbothermal reduction method to treat the ore, successfully achieving efficient separation and recovery of iron and aluminum.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
Hicham Amar, Mostafa Benzaazoua, Abdellatif Elghali, Yassine Taha, Mustapha El Ghorfi, Anna Krause, Rachid Hakkou
Summary: This study aims to recover phosphate and increase the P2O5 content in phosphate mine waste rock (PMWR) through hand and sensor-based sorting methods. The results show that DE-XRT technology can recover 70 wt% of phosphate and increase the P2O5 content from 13.5 wt% to 18.5 wt%. In addition, material sorting technology can reduce the environmental impact of PMWR and utilize the remaining lithologies for civil engineering applications.
MINERALS ENGINEERING
(2023)
Review
Engineering, Chemical
Junqiang Chen, Shuchen Sun, Ganfeng Tu, Faxin Xiao
Summary: With the increasing demand for rare earth elements (REEs) in high-tech fields, research on the recovery of valuable elements from rare earth molten salt electrolytic slag has become a hot topic. This review provides a systematic summary of various methods used to recover valuable elements from the slag, and proposes a new idea of preparing solid residue into glass ceramics for green recycling and treatment of the slag.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
P. H. V. Diniz, A. C. Azevedo, J. Rubio
Summary: This study investigates the effect of nanobubbles (NBs) on the filtration rate of quartz and iron ore tailings. The results show that NBs significantly improve the filtration rate for fine and medium-sized quartz samples, but have no substantial effect on coarse material. Similar results are found with fine iron tailings, where the enhanced filtration rate diminishes when mixed with coarse tailings.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
Hangtao Liu, Ruibo Jia, Zhiping Wen, Jinhe Pan, Lei Zhang, Shulan Shi, Changchun Zhou
Summary: This study proposes a new working condition recognition method based on nonsubsampled contourlet transform (NSCT) to accurately identify flotation conditions. The method extracts multiscale features from enhanced froth images using NSCT and achieves the highest classification accuracy in actual froth images.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
Jia Zhao, Labone L. Godirilwe, Kazutoshi Haga, Manabu Yamada, Atsushi Shibayama
Summary: Six novel collectors were synthesized and evaluated as collectors in the flotation of copper sulfide ores. The results showed that the novel collectors, especially 2-OA, exhibited strong flotation capacity and improved copper recovery compared to the standard collector PAX.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
Zhan Ding, Jie Li, Jiaqiao Yuan, Anmei Yu, Shuming Wen, Shaojun Bai
Summary: This research systematically investigated the influence of calcium ions on the adsorption behavior of sodium oleate and its response to quartz flotation. The addition order of calcium ions was found to affect the flotation recovery of quartz. The formation of Ca-OOCR colloid precipitates reinforced the adsorption of NaOL and Ca2+ onto the quartz surface. The adsorption mechanism of Ca-OOCR colloid precipitates played a more important role in the adsorption of sodium oleate and calcium ion species, as well as its response to quartz flotation.
MINERALS ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Pal Washa Shahzad Rathore, Matloob Hussain, Muhammad Bilal Malik, Yawar Amin
Summary: Machine learning techniques were used to predict and segregate potential reservoir and nonreservoir facies in the Cretaceous Pab Formation based on well log analysis. The Random Forest algorithm showed higher prediction accuracy compared to the Decision Tree algorithm, making it more efficient for predicting potential reservoir facies in wells without sophisticated well logs.
JOURNAL OF APPLIED GEOPHYSICS
(2023)
Article
Geology
Fucheng Yang, Rolf L. Romer, Johannes Glodny, Wenchang Li
Summary: The study indicates that the Relin Mo-W (-Cu) deposit in the northern Sanjiang area is mainly derived from mantle melts that mixed with partial melts from the Paleoproterozoic crust. The formation of the deposit is mainly influenced by fractional crystallization and late-magmatic alteration, with strong sericite alteration resulting in enrichment of ore elements.
ORE GEOLOGY REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Zheng Ma, Xianlei Xu, Suping Peng, Pengqiao Zhu, Yidan Wang
Summary: In this paper, an air-coupled ground penetrating radar (GPR) antenna is developed for rapid and high precision detection of coal-rock interface in intelligent coal mining. The antenna features ultra-wideband, narrow beam, and high gain, providing non-contacting, high-resolution detection during the mining process. The validation tests in mine show that the antenna has superior detection ability and applicability in complex geological environment, facilitating the identification of coal-rock interface.
JOURNAL OF APPLIED GEOPHYSICS
(2023)
Article
Engineering, Chemical
Somayeh Dashti, Sina Shakibania, Fereshteh Rashchi, Ahmad Ghahreman
Summary: This study investigated the solvent extraction of different groups of rare earth elements (LREE, MREE, and HREE) from a chloride medium using a mixture of Cyanex 572 and Alamine 336. The results showed that the addition of Alamine 336 to Cyanex 572 increased the extraction efficiency of LREEs and MREEs. The analysis suggested that Alamine 336 acted as a proton ion extractor and phase modifier for REECl2+ complexes.
MINERALS ENGINEERING
(2023)
Article
Geology
Yiwei Song, Lin Yang, Ke Yang, Bin Wang, Zhenyu Ma, Huanhuan Wu, Peng Li, Qingfei Wang
Summary: The study reveals the spatio-temporal and genetic relationships between tungsten (W) and gold (Au) mineralization in the West Qinling Orogen. The Zhaishang deposit, a large Au-W deposit, shows two separate mineralization events characterized by different geological observations and mineral assemblages.
ORE GEOLOGY REVIEWS
(2023)
Article
Geology
Xian Liang, Fang-Yue Wang, Long Zhang, Jun-Wu Zhang, Chang-Shuai Wei, Yu Fan, Xian-Zheng Guo, Tao-Fa Zhou, Ju-quan Zhang, Qing-Tian Lu
Summary: This study investigates the distribution and enrichment of Co in the Zhuchong iron deposit in the Middle-Lower Yangtze River Valley Metallogenic Belt in eastern China. The results highlight pyrite as the primary carrier of Co and reveal a temperature-dependent enrichment of Co in pyrite at Zhuchong.
ORE GEOLOGY REVIEWS
(2023)
