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Blast furnace ironmaking process with super high TiO_(2) in the slag:Density and surface tension of the slag

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International Journal of Minerals,Metallurgy and Materials 2022年第6期29卷 1170-1178页

作者： Zhengde Pang Yuyang Jiang Jiawei Ling Xuewei Lü zhiming yan Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China WMG University of WarwickCoventryCV47ALUK

Aiming at the process of smelting ultra-high(>80%)or even full vanadium titanomagnetite in blast furnace,we are conducting a series of works on physics character of high TiO_(2) bearing blast furnace slag(BFS)for slag *** work discussed the density and surface tension of high TiO_(2) bearing BFS using the Archimedean principle and the maximum bubble pressure method,*** influence of TiO_(2) content and the MgO/CaO mass ratio on the density and surface tension of CaO-SiO_(2)-TiO_(2)-MgO-Al_(2)O_(3)slags were investigated Results indicated that the density of slags decreased with the TiO_(2) content increasing from 20wt%to 30wt%,but it increased slightly with the MgO/CaO mass ratio increasing from 0.32 to *** view of silicate network structure,the density and the degree of polymerization(DOP)of network structure have a consistent *** addition of TiO_(2) reduced(Q^(3))^(2)/(Q^(2)) ratio(Q^(2) and Q^(3) represent structural unit with bridge oxygen number of 2 and 3,respectively)and then decreased DOP,which led to the decrease of slag *** surface tension of CaO-SiO_(2)-TiO_(2)-MgO-Al_(2)O_(3) slags decreased dramatically with the TiO_(2) content increasing from 20wt%to 30wt%.Conversely,it increased with the MgO/CaO mass ratio increasing from 0.32 to ***,the iso-surface tension lines were obtained under 1723 K using the Tanaka developed model in view of Butler *** may be useful for slag optimization of ultra-high proportion(>80%)or even full vanadium titanomagnetite under BF smelting.

关键词： vanadium titanomagnetite density surface tension iso-surface tension lines

The net primary productivity of Mid-Jurassic peatland and its control factors: Evidenced by the Ordos Basin

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International Journal of Mining Science and Technology 2018年第2期28卷 177-185页

作者： Wang Dongdong yan zhiming Liu Haiyan Lv Dawei Hou Yijun College of Earth Science and Engineering Shandong University of Science and Technology College of Geoscience and Surveying Engineering China University of Mining and Technology(Beijing)

Using the large-scale thick 4# coal seam from the Mid-Jurassic in the southern Ordos Basin as an example, this paper studied the net primary productivity(NPP) level of the Mid-Jurassic peatland, and discussed its control factors. Geophysical logging signals were used for a spectrum analysis to obtain the Milankovitch cycle parameters in coal seam. These were then used to calculate the accumulation rate of the residual carbon in 4# coal seam. The carbon loss can be calculated according to the density and residual carbon content of 4# coal seam. Then, the total carbon accumulation rate of the peatland was further derived, and the NPP of peatland was determined. The results show that the NPP of MidJurassic peatland is higher than that of Holocene at the same latitude. Comprehensive analysis indicates that the temperature, carbon dioxide and oxygen levels in atmosphere are the main control factors of the NPP of Mid-Jurassic peatland.

关键词： Net primary productivity(NPP) Peatland Milankovitch cycle Carbon accumulation rate Mid-Jurassic

Identification of odorous compounds in reclaimed water using FPA combined with sensory GC-MS

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Journal of Environmental Sciences 2011年第10期23卷 1600-1604页

作者： zhiming yan Yu Zhang Jianwei Yu Hongying Yuan Min yang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085 China.

Odorous compounds in the influent of a reclaimed water treatment plant （RWTP）, consisting of coagulation, sedimentation, continuous micro-filtration （CMF）, and chlorination in succession, in a north China city, were identified by combining flavor profile analysis （FPA） with sensory gas chromatograph-mass spectrometry （GC-MS）. The sewery/swampy/septic odor with an odor intensity of 6.4 was found to be the major odor group in the RWTP influent, and the existence of well-known odorant including dimethyl disulfide, dimethyl trisulfide, indole and skatole were confirmed using GC-MS. The result of a spiking test showed that the intensity （3.6） of the sewery/swampy/septic odor caused by these four chemicals contributed to over 50% of the odor intensity of the influent. The FPA intensity for sewery/swampy/septic odor in the RWTP effluent was 3.8, showing that the treatment process was not efficient for the removal of odorants, particularly indole and skatole.

关键词： sewery/swampy/septic odor reclaimed wastewater flavor profile analysis sensory-GC-MS analysis

Anisotropic coal permeability and its stress sensitivity

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International Journal of Mining Science and Technology 2019年第3期29卷 507-511页

作者： zhiming yan Kai Wang Jie Zang Chuan Wang Ang Liu Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining & TechnologyBeijing 100083China yangquan Coal Industry (Group) Co. LTDYangquan 045000China Faculty of Resource & Safety Engineering China University of Mining & TechnologyBeijing 100083China State Key Laboratory of Coal Resources and Safe Mining China University of Mining & TechnologyBeijing 100083China

This paper focuses on anisotropy of coal permeability and its stress *** blocks were taken from Xinjing Coal Mine in yangquan Coal *** cores were then drilled along the strike,dip,and vertical *** permeabilities were measured with respect to stress by using a self-developed coal permeability measurement *** used samples exhibited significant permeability *** permeability along the strike direction was greatest among the three directions,the permeability along the vertical direction was the smallest,and the permeability along the dip direction was between the other two *** sensitivity of coal permeability to stress was transversely *** stress sensitivity coefficient was greater along the horizontal directions than along the vertical *** permeability exhibited anisotropic stress sensitivity due to anisotropy in Young’s modulus and *** results obtained in this study are useful for optimizing the arrangement of pre-drainage boreholes.

关键词： Coal permeability Anisotropy Stress sensitivity Gas drainage Experiment

Net primary productivity and its control of the Middle Jurassic peatlands: An example from the southern Junggar coalfield

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Science China Earth Sciences 2018年第11期61卷 1633-1643页

作者： yanan LI Longyi SHAO zhiming yan Haihai HOU Yue TANG David J.LARGE College of Geoscience and Surveying Engineering China University of Mining and Technology Oil and Gas Resources Survey Center China Geological Survey Administration Faculty of Engineering University of Nottingham

The Jurassic is an important period of global coal formation, including the development of several large coalfields in central Asia and northern China. Individual seams within these peatlands represent sustained periods of terrestrial carbon accumulation and a key environmental indicator attributed to this record is the rate of carbon accumulation. Determining the rate of carbon accumulation requires a measure of time contained within the coal and this study aimed at determining the rate via the identification of Milankovitch orbital cycles using spectral analysis. Spectral analyses of geophysical data from two thick coal seams, No. 43(35.9 m) and No. 3(13.2 m), of the Middle Jurassic of the southern Junggar coalfield were conducted to identify significant signals of variations in ash content. The results showed that the variations in ash content of the coal showed spatial cycles at 0.2, 0.7 and 1.1 m^(-1), which were interpreted to represent 123 ka(eccentricity), 37.1 ka(obliquity), and 21.2 ka(precession) orbital periodicities, respectively. Using this timeframe, the depositional time of the No. 43 and No. 3 coal seams were calculated to be 876–970 and 322–357 ka, respectively. In combination with an understanding of carbon loss during coalification, the carbon accumulation rates of these Middle Jurassic peatlands were calculated to be 58.6–64.9 and60.3–66.8 g C m^(-2) a^(-1) for the No. 43 and No. 3 coal seams, respectively. Given that the net primary productivity(NPP) was 4.3 times the value of the carbon accumulation in a mid-latitude region of 40°–45°N, an NPP of 251.8–279.1 and259.1–287.1 g C m^(-2) a^(-1) was calculated for the No. 43 and No. 3 coal seams, respectively. In the context of the same paleolatitude(40°–45°N) and peat type, the NPP values of the Middle Jurassic strata in the study area were higher than those of the peatlands of the Holocene and Permian, and were similar to the NPP values of Early Cretaceous peatlands. Considering the NPP of a peat

关键词： Peatland Middle Jurassic Milankovitch cycle Net primary productivity Mid-latitude region Paleoclimate

Influence of deep magma-induced thermal effects on the regional gas outburst risk of coal seams

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International Journal of Coal Science & Technology 2021年第6期8卷 1411-1422页

作者： Jianshe Linghu Wei Zhao Jianbin Zhou zhiming yan Kai Wang Chao Xu Chuanwen Sun Huayang New Material Technology Group Co. LTD.Yangquan Shanxi 045000China Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining and Technology(Beijing)Beijing 100083China State Key Laboratory of Coal and Coalbed Methane Co-Mining Jincheng Shanxi 048012China Risk Management and Safety Engineering School China University of Mining and Technology(Beijing)Beijing 100083China

The thermal effect caused by deep magma intrusion can not only accelerate the metamorphism of coal body,but also bring additional thermal field that changes the mechanical environment of coal seams,thereby affecting the permeability of coal *** from shallow coal resources,deep coal resources are in a mechanical environment characterized by limited stress and ***,the thermal effect has a more significant influence on the distribution and permeability characteristics of deep coal *** this study,the evolution history of highly metamorphic coal seams in yangquan mining area was analyzed,and the main effect of magmatic activity on coal seams was *** on the determined vitrinite reflectance data of typical mines in yangquan mining area,the maximum paleotemperature was calculated by adopting the Barker’s ***,the paleotemperature distribution in yangquan mining area was summarized,and its relationship with the metamorphic degree was ***,a new permeability model considering the thermal strain was proposed to analyze the permeability evolution in deep coal seams at different ground ***,through a combination of the results of gas pressure and outburst number in Sijiazhuang Mine,yangquan No.5 Mine and Xinjing Mine,the influence of ground temperature on the gas outburst risk in yangquan mining area was *** following conclusions were drawn:The maximum paleotemperature in yangquan area can be 303*** addition,the paleotemperature in the south is higher than that in the north of yangquan mining *** various temperatures at different depths bring about different degrees of thermal stress to different coal seams,leading to different *** the fixed displacement boundary conditions in the deep,the coal seam folds and bends to varying ***,the difference in the ground temperature raises the a value of coal seams and lowers the permeability,which promotes the formation of gas-r

关键词： Gas outburst Metamorphic degree Geological structure Thermal evolution yangquan mining area

Identification of Milankovitch Cycles and Calculation of Net Primary Productivity of Paleo-peatlands using Geophysical Logs of Coal Seams

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Acta Geologica Sinica(English Edition) 2022年第6期96卷 1830-1841页

作者： SHAO Longyi WEN He GAO Xiangyu Baruch SPIRO WANG Xuetian yan zhiming David J.LARGE College of Geoscience and Surveying Engineering China University of Mining and Technology(Beijing)Beijing 100083China Department of Earth Sciences Natural History MuseumLondon SW75BDUK Institute of Architectural Engineering Weifang UniversityWeifangShandong 261061China Faculty of Engineering University of NottinghamNottingham NG72RDUK

Individual coal seams formed in paleo-peatlands represent sustained periods of terrestrial carbon accumulation and a key environmental indicator attributed to this record is the rate of carbon *** the rate of carbon accumulation requires a measure of time contained within the *** study aimed to determine this rate via the identification of Milankovitch orbital cycles in the *** geophysical log is an ideal paleoclimate proxy and has been widely used in the study of sedimentary records using spectral *** analyses of geophysical log from thick coal seams can be used to identify the Milankovitch cycles and to calculate the period of the coal *** considering the carbon loss during coalification,the long-term average carbon accumulation rate and net primary productivity(NPP)of paleo-peatlands in coal seams can be *** review paper presents the procedures of analysis,assessment of results and interpretation of geophysical logs in determining the NPP of paleo-peatlands.

关键词： paleo-peatlands Milankovitch cycle carbon accumulation rate net primary productivity(NPP) coal seam

Inertinite in coal and its geoenvironmental significance:Insights from AI and big data analysis

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Science China Earth Sciences 2024年第6期67卷 1779-1801页

作者： Longyi SHAO Jiamin ZHOU Timothy PJONES Fanghui HUA Xiaotao XU zhiming yan Haihai HOU Dongdong WANG Jing LU State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources and College of Geoscience and Surveying Engineering China University of Miningand Technology(Beijing)Beijing 100083China School of Earth and Environmental Sciences Cardiff UniversityCardiff CF103YEWalesEngland General Prospecting Institute of China National Administration of Coal Geology Beijing 100039China Institute of Architectural Engineering Weifang UniversityWeifang 261061China College of Mining Liaoning Technical UniversityFuxin 123000China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China

Inertinite,as an important and abundant maceral group in coal,is critical for the study of palaeowildfires and their roles in the Earth’s ***,there has been a significant amount of research on the relationship between palaeowildfire,palaeoclimate change and palaeovegetation evolution based on inertinite *** reflectance of fusinite and semifusinite has been used to estimate the combustion temperature and type of palaeowildfires,and then to evaluate the combustion characteristics of different types of *** relative abundance of inertinite can be used to estimate the atmospheric oxygen *** rapid development of artificial intelligence(AI)and online tools to search scientific databases has presented an opportunity for us to find,collect,arrange,and analyse data from the earliest to latest publications on *** data extraction tool Deep Shovel is used to collect and analyse global inertinite data from the Silurian to the *** software programs such as Gplates,ArcGIS pro and Tableau are then applied to model the relative abundance of inertinite over geological time,which can be correlated with other parameters such as atmospheric oxygen contents,plant evolution and palaeoclimate *** distribution of inertinite in coals varied over different geological periods,being typified by the“high inertinite content-high atmospheric oxygen level”period in the Permian and the“low inertinite content-low atmospheric oxygen level”period in the *** study has proposed a possible model of the positive and negative feedbacks between inertinite characteristics and palaeoenvironmental factors,and has revealed the exceptional role of inertinite in palaeoenvironmental *** research on inertinite will be focused on the integrated study of organic petrology and organic geochemistry of inertinite,the big data-driven research on the temporal and spatial distribution of the global inertinite,the exploration of the

关键词： Inertinite Palaeowildfires Atmospheric oxygen Palaeoclimates Palaeoecosystems

Rare Earth Application in Sealing Anodized Al-Based Metal Matrix Composites

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Journal of Materials Science & Technology 2001年第2期17卷 283-284页

作者： Xingwen YU, Chunan CAO, Chuanwei yan and zhiming YAO State Key Laboratory for Corrosion and Protection, Institute of Corrosion and Protection of Metals, Chinese Academy of Science, Shenyang 110015, China Chinese Acad. of Sci. Shenyang 110015 China

A new method for corrosion protection of Al-based metal matrix composites (MMC) was developed using two-step process, which involves anodizing in H2SO4 solution and sealing in rare earth solution. Corrosion resistance of the treated surface was evaluated with polarization curves. The results showed that the effect of the protection using rare earth sealing is equivalent to that using chromate sealing for Al6061/SiCp. The rare earth metal salt can be an alternative to the toxic chromate for sealing anodized Al MMC.

关键词： Al Rare Earth Application in Sealing Anodized Al-Based Metal Matrix Composites SiC