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Interaction mechanism between coal combustion products and coke in raceway of blast furnaces

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Journal of Iron and Steel Research International 2017年第1期24卷 8-17页

作者： chong zou Liang-ying Wen Jun-xue Zhao Rui-meng Shi School of Metallurgical Engineering Xi'an University of Architecture and Technology School of Materials Science and Engineering Chongqing University

The interaction mechanism between the combustion products of pulverized coal injected and coke in the raceway of blast furnace was studied through thermodynamic calculation and *** results indicated that additives significantly affected the melting property of coal ash in high temperature *** the unburnt char,raw coal ash,and catalyzed coal ash failed to wet the coke surface,the wettability of the catalyzed coal ash on the coke was greater than that of the raw coal *** the unburnt char had weak reaction with the coke surface,it showed little influence on the surface morphology of the *** interaction between the raw coal ash and the coke gave rise to the increase in the pore size on the coke ***,the raw coal ash only affected the coke surface and the entrances of the pores owing to its poor *** being melted,the catalyzed coal ash was expected to immerge into the inside part of the coke and then react with the coke,resulting in an expansion and increase of coke *** raw coal ash and the unburnt char reduced the coke reactivity,while the catalyzed coal ash improved the coke ***,the coal ash containing Fe2O3 exhibited a larger influence on the reactivity than that containing CaO.

关键词： Coal Coke Tuyere raceway Blast furnace Pulverized coal injection Interaction mechanism

Effects of microstructural evolutions of pyrolysis char and pulverized coal on kinetic parameters during combustion

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Journal of Iron and Steel Research International 2019年第12期26卷 1273-1284页

作者： Jiang-yong He chong zou Jun-xue Zhao Cheng Ma Xiao-rui Zhang School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710311ShaanxiChina

Pyrolysis chars have potential as fuels for pulverized coal injection(PCI);however,their proper and efficient utilization requires evaluation of char combustion *** combustion characteristics of two chars(F-char and M-char)and two pulverized coals(H-PCI and P-PCI)were analyzed herein using thermogravimetric analysis–mass *** apparent activation energy(Ea)of the sample under non-isothermal combustion conditions was obtained using the Flynn–Wall–Ozawa and Kissinger–Akahira–Sunose methods,and the reaction mechanism for the fuels was established using the Malek ***,changes in the microscopic pore structure and carbon chemical structure of the fuels at different stages of combustion were characterized using N2 adsorption and X-ray diffraction to analyze the relationship between microstructural evolution and *** results suggested that Ea of the sample first rapidly decreased and then became stabilized during *** with pulverized coals,the two chars presented more developed micro-scopic pore structure,less-ordered carbon chemical structure and lower Ea during *** combustion,the stacking height of the aromatic layer first decreased and then increased,whereas the specific surface area first increased and then *** volatile content significantly influenced Ea only during the initial stage of *** the middle stage,Ea was controlled more by the microscopic pore structure and the carbon chemical structure,and those influences disappeared in the later *** transition point of the structures affecting Ea occurred at a combustion rate between 52.9%and 72.0%.In general,the microscopic pore structure and the carbon chemical structure influenced kinetic parameters more than the volatile content.

关键词： Char Pulverized coal Combustion Chemical structure Kinetics Activation energy Pore structure

基于RobotStudio的物料分拣装置数字孪生系统研究

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自动化应用 2025年第1期66卷 224-227,231页

作者：凌旭邹冲戴俊良彭木荣湖南化工职业技术学院智能控制工程学院湖南株洲412000 湖南工业大学机械工程学院湖南株洲412000

随着制造业智能化改造和数字化转型的推进,数字孪生技术在各行业中均有应用,但不同的应用领域所使用的软件平台不同。以物料分拣装置为载体,基于RobotStudio软件平台搭建数字孪生系统。通过RobotStudio软件设置物料分拣系统的机械装置,... 详细信息

随着制造业智能化改造和数字化转型的推进,数字孪生技术在各行业中均有应用,但不同的应用领域所使用的软件平台不同。以物料分拣装置为载体,基于RobotStudio软件平台搭建数字孪生系统。通过RobotStudio软件设置物料分拣系统的机械装置,利用Smart组件功能随机产生虚拟物料块,通过相机对物料块进行图像处理,提取图像信息。利用C#语言搭建西门子TIA软件与VisionPro软件的通信平台,实现图像数据与PLC的共享;利用RobotStudio工作站进行虚拟调试,实现数字孪生系统的功能。通过物料分拣装置数字孪生系统的研究,为物料分拣装置设计与优化提供了新思路。

关键词：数字孪生 RobotStudio软件平台物料分拣机器视觉

Difference in microstructural characteristics of stamp-charged coke and gravity-charged coke with approximate macroscopic performance

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Journal of Iron and Steel Research International 2024年第5期31卷 1050-1062页

作者： chong zou Zheng-yan Huang Jian-yun Li Bin Li Shi-wei Liu Yuan She School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710311ShaanxiChina Technical Center of Shandong Iron and Steel Co. Ltd.(Laiwu Branch)Jinan271104ShandongChina

The microstructural characteristics including optical texture,porosity and pore structure and chemical structure of stamp-charged coke(SCC)and gravity-charged coke(GCC)with similar conventional macro-indicators were investigated,and the properties including micro-strength,reactivity of coke matrix and that after alkali enrichment were comparatively studied by various characterization *** anisotropic structure of SCC is composed of high content of fine mosaic texture,while the content of medium mosaic texture,coarse texture and fibrous texture is *** statistical average shows that the fine mosaic average of SCC(24.89%)is 3.78 times the GCC average(6.58%),and the coarse mosaic average(1.24%)is only about 1/3 of the GCC average(3.43%).The porosity of SCC is lower than that of GCC,but tamping process does not lead to the fact that the number of closed pores of SCC is significantly lower than that of *** the structure of SCC is compact,its pore number is large and the pore wall is *** of coke with diameter less than 150 nm seem unaffected by tamping *** aromatic structure of SCC was less ordered than that of GCC,which was speculated to be related to the addition of more low metamorphic coal in *** microscopic strength and structural strength of SCC are lower than those of *** reactivity of coke matrix is affected by the specific surface area,but it is not the determining factor of its *** improvement in dissolution reactivity of coke after potassium enrichment is independent of coke type.

关键词： Stamp-charged coke Optical texture Porosity Microstructure Reactivity

Comparison of semi-coke with traditional pulverized coal injection and iron ore sintering fuels based on chemical structure and combustion behavior

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Journal of Iron and Steel Research International 2022年第5期29卷 725-740页

作者： Jiang-yong He chong zou Jun-xue Zhao Dong Liang Jia-le Xi Cheng Ma School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710311ShaanxiChina Technical Center of Shandong Iron and Steel Co. Ltd.(Laiwu Branch)Jinan271104ShandongChina

Substantial semi-coke has been produced through the industrialized low-temperature pyrolysis process,which has great potential as an alternative fuel for pulverized coal injection(PCI)and iron ore sintering.X-ray diffraction,Raman spectroscope,and thermal analysis were used to compare the carbon chemical structure and combustion reactivity of semi-coke,pulverized coal,and coke *** results show that the average volatile matter content in 46 types of semi-cokes is 8.94 wt.%.The fluctuation range of the characteristic parameters of the semi-coke chemical structure is d_(002)=(0.352–0.379)nm and A_(D1)/A_(G)=(2.51–7.92),while the fluctuation range of the characteristic parameters of pulverized coal is d_(002)=(0.348–0.373)nm and A_(D1)/A_(G)=(1.71–9.03)(where d_(002)means the interlayer spacing between the aromatic planes,and A_(D1)/A_(G)is an index that characterizes the degree of disorder of the char structure through the area ratio of the defect peak band D1 to the perfect graphite peak band G);the overlap between these ranges is relatively ***,the fluctuation range of the characteristic parameters of coke breeze is d_(002)=(0.343–0.350)nm and A_(D1)/A_(G)=(0.75–2.51),which is markedly different from that of ***-coke combustion reactivity is close to that of pulverized coal,but considerably better than that of coke *** terms of chemical structure and combustion reactivity,semi-coke can be used as an alternative fuel for PCI;however,when used for sintering alternative fuel,matching of the heat supply and demand in the later sintering stage must be scrupulously analyzed.

关键词： Semi-coke Coke Blast furnace Pulverized coal injection Combustion

Effects of Additives on Sulfur Transformation,Crystallite Structure and Properties of Coke during Coking of High-sulfur Coal

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Journal of Iron and Steel Research International 2015年第10期22卷 897-904页

作者： Sheng-fu ZHANG Liang-ying WEN Kun WANG chong zou Jian XU College of Materials Science and Engineering Chongqing University

High-sulfur coal, as an alternative coal source, has a relatively high proportion in coal reserves. However, the feature of high sulfur content, which can cause environmental pollution and poor quality of molten iron, restrains its utilization in coking industry. Coking experiments of high-sulfur coal with Fe2O3, La2O3 and CaO as additives were carried out in order to fix the sulfur in coke. The effects of additives on sulfur distribution, crystallite structure, surface morphology and properties of coke were investigated. The results indicate that CaO can be used as sulfur-fixing agent in coking process, and CaS is the main mineralogical phase of the sulfur-contained mineral constituents in coke. Fe2O3 and La2O3 facilitate the conversion of CaO to CaS. The additives mainly influence the crystallite height and the average interlayer spacing doo2 of coke. The addition of La2O3 increases the value of the crystallite height while the addition of CaO and Fe2O3 decreases it. CaO leads the pores of coke to increase with its physical action and agglomerating characteristic. Fe2O3 and C can form （Fe,C）, resulting in the pulverization and erosion of the pore wall. La2O3 makes the coke surface become more compact and thinner. The reactivity of coke increases with the decrease of crystallite height and crystallite layer number.

关键词： coke additive sulfur transformation crystallite structure coke reactivity coke strength after reaction

Reduction behavior of iron ore powder by high-volatile coal in thermogravimetric-gas chromatographic and kinetic analysis

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Journal of Iron and Steel Research International 2024年第1期31卷 92-107页

作者： Rui-meng Shi Qi-yuan Mi Bin Li Xiao Shi chong zou Jing Guo Han-jie Guo School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina China International Engineering Consulting Corporation Beijing100048China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

The reduction behavior of iron ore powder by high-volatile coal was investigated,and its kinetic mechanism was *** effect of volatiles in coal on the reduction reaction of iron ore was compared by utilizing a Xinjiang lignite with a high volatile content and its pyrolysis carbon produced by high-temperature pyrolysis to remove volatiles,serving as a *** mass loss and gas composition of the samples during the reduction process were detected using thermo-gravimetric analysis and gas chromatography,and the morphological changes of iron ore powder were observed through scanning electron *** kinetic parameters of the iron oxide reduction reaction were calculated by the Flynn-Ozawa-Wall method,and the kinetic mechanism of volatile participation in the iron oxide reduction reaction was determined through the Coats-Redfern *** results indicate that the coupling effect between the high-volatile coal pyrolysis and reduction reactions occurs during the second stage of the entire coupling process,which corresponds to the late stage of coal pyrolysis with a substantial release of H_(2)and *** volatiles in coal actively participated in the reduction reaction,reducing the initiation temperature of the reaction by around 200℃.The reduction of iron oxides by high-volatile coal was jointly promoted by the"hydrogen cycle"and"carbon cycle",resulting in a higher reduction extent and metallization rate at the end of the *** high-volatile coal was used as the reductant,the average activation energy for the entire process was 76.5 kJ/mol,a significant decrease compared to the employment of pyrolysis carbon without volatiles as the reductant(1167 kJ/mol).

关键词： Direct reduction High-volatile coal Volatile Kinetics Reduction mechanism

Combining Ability and Genetic Effects of Germination Traits of Brassica napus *** Waterlogging Stress Condition

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Agricultural Sciences in China 2010年第7期9卷 951-957页

作者： CHENG Yong GU Min CONG Ye zou chong-shun ZHANG Xue-kun WANG Han-zhong Oil Crops Research Institute Chinese Academy of Agriculture Sciences/Key Laboratory for Oil Crop Biology Ministry of Agriculture Wuhan 430062. P.R.China Agricultural College Yangtze University Jingzhou 434023 P.R. China

Cross combinations from six rapeseed cultivars and lines were evaluated under waterlogging stress condition in order to understand the genetic mechanism of waterlogging tolerance of Brassica napus *** provide reasonable improvement *** were six germination traits investigated on combining ability and heritability using complete diallel crossing method designed for 30 combinations from those six cultivars and *** traits included relative root length,stem length,fresh weight per plant,survival rate,electrical conductivity,and vigor *** flooding treatment,the six traits of parents and F1 were *** general combining ability（GCA） and special combining ability（SCA） of germination traits were analyzed using Griffing I *** 30 cross combinations,the GCA was significantly different among six waterlogging resistance *** SCA of these traits was significantly different except the SCA of electrical *** a representative trait of waterlogging tolerance in rapeseed,relative vigor index had the highest narrow heritability and relatively low broad *** cultivars Zhongshuang 9 and P79 had higher tolerance potential to waterlogging *** can be concluded that combining ability and genetic effects of relative vigor index during germination stage could be used to identify the waterlogging tolerance of rapeseed in breeding program.

关键词： Brassica napus L. relative vigor index waterlogging tolerance germination trait combining ability diallel crossing

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多模态范畴类型逻辑

安徽师范大学学报（社会科学版） 2012年第6期40卷 661-667页

作者：邹崇理中国社会科学院哲学所北京100732

多模态范畴类型逻辑是在组合范畴语法(CCG)和范畴类型逻辑(CTL)基础上发展起来的新方向。基于范畴语法的CCG强调函子范畴的组合运算,给各类规则中的斜线算子添加不同的模态下标,并在词库中给词条指派的范畴含有模态下标的斜线算子,从而... 详细信息

多模态范畴类型逻辑是在组合范畴语法(CCG)和范畴类型逻辑(CTL)基础上发展起来的新方向。基于范畴语法的CCG强调函子范畴的组合运算,给各类规则中的斜线算子添加不同的模态下标,并在词库中给词条指派的范畴含有模态下标的斜线算子,从而限制了这些规则的适用范围,使描述自然语言的范畴推演进一步精细化。CTL则遵循严格的逻辑规范,对CCG涉及的函子范畴的各类规则从结构性质的角度把握其根源,用多模态范畴类型逻辑的方式涵盖了CCG各类规则。这就是CCG和CTL的融合产物。

关键词：组合范畴语法范畴类型逻辑多模态范畴类型逻辑