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Journal of Wuhan University of Technology(Materials Science) 2023年第3期38卷 652-658页

作者：宋玉来 dou zhihe CHENG Chu 张廷安 School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252059China Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores Ministry of EducationNortheastern UniversityShenyang 110819China School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471003China

Based on the mass action concentration theory,a novel thermodynamic analysis for the raw material ratio in the procedure of preparing Ti-6Al-4V alloy by aluminothermic reduction process is proposed in this paper,which is originated from TiO_(2),Al particles,and V_(2)O_(5) as feedstocks,and the relevant equilibrium thermodynamics was calculated through this new method.The results show that the range of aluminum addition coefficient in raw material to experiment should be controlled within 61.5%-100%,which can significantly reduce the number of experimental groups.This method is ready to regulate the matter of excessive aluminum content in reactants for materials preparation,especially for those reactions including elements that are effortless to combine with aluminum to form the corresponding intermetallics or alloys.In addition,it can also be used in general metallurgy or material preparation process to effectively predict the composition and proportion of equilibrium components under certain conditions.

关键词： mass action concentration titanium alloy thermodynamics intermetallics thermite reduction

Effect of Vortex Stirring on the Dilution of Copper Slag

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Journal of Wuhan University of Technology(Materials Science) 2022年第4期37卷 699-706页

作者：张保敬张廷安 dou zhihe ZHANG Dongliang School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221l6China School of Metallurgy Northeastern UniversityShenyang 110819China

In order to solve the problem that the vulcanizing agent utilization rate is low and the dilution effect of copper slag is poor,the vortex stirring dilution method was used to improve the conditions of the dilution kinetics and copper recovery.The water model was used to simulate the effect of copper slag dilution.Under the premise of keeping the Reynolds number consistent,silicone oil and glass beads were used instead of copper slag and vulcanizing agent.Based on the relationship between voltage and concentration,the PC6D dual-channel particle concentration measuring instrument was used to study the stirring speed and the insertion depth of the stirring paddle in model experiments,and the suitable conditions were speed 250 rpm and insertion depth 70 mm.The fire dilution of copper slag was done under the conditions.After stirring and sedimentation,the Fe_(3)O_(4) in slag decreased from 22.58% to 4.65%,and the copper content of the slag decreased from 2.94% to 0.34%.The copper recovery was 88.44%.

关键词： copper slag dilution vortex stirring water model the PC6D dual-channel particle concentration measuring instrument

料斗倾角对气基竖炉布料过程中物料流动及分布的影响

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材料与冶金学报 2024年第2期23卷 136-144页

作者：王琦岳强豆志河张钰洁东北大学冶金学院沈阳110819 东北大学国家环境保护生态工业重点实验室沈阳110819 东北大学多金属共生矿生态化冶金教育部重点实验室沈阳110819

球团矿离开料斗时的颗粒偏析会影响其在气基竖炉内的分布,分布不合理将影响还原气的利用率建立20°~70°倾角的料斗、导料管、溜槽、气基竖炉三维模型,基于离散元法研究物料从料斗到气基竖炉布料过程中的流动和分布结果表明:排料时,20°... 详细信息

球团矿离开料斗时的颗粒偏析会影响其在气基竖炉内的分布,分布不合理将影响还原气的利用率建立20°~70°倾角的料斗、导料管、溜槽、气基竖炉三维模型,基于离散元法研究物料从料斗到气基竖炉布料过程中的流动和分布结果表明:排料时,20°~25°倾角的料斗内炉料流型均为整体流,30°~55°倾角的料斗内炉料流型均为混合流,60°~70°倾角的料斗内炉料流型均为漏斗流漏斗流促使料层形成快速流动的中心通道,大颗粒会更早地离开料斗进入炉内,在落点区域堆积,导致料斗内大颗粒负偏析、竖炉内落点区域大颗粒正偏析20°~35°倾角的料斗布料后,炉内孔隙率偏差分布在000383~000468,倾角增大,孔隙率偏差增大改变炉料-料斗静摩擦系数、炉料批重、料斗半径等参数,发现料斗倾角是影响布料过程和结果的主要因素,孔隙率偏差仍随料斗倾角的增大而增大。

关键词：离散单元法气基竖炉料斗颗粒流动物料分布

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高锌含量铅锌氧化渣直接还原试验研究

中国有色冶金 2024年第3期53卷 57-63页

作者：欧阳坤苏飞豆志河刘永富深圳市中金岭南有色金属股份有限公司韶关冶炼厂广东韶关512000 东北大学冶金学院辽宁沈阳110819

铅锌氧化渣熔融还原是得到金属铅和锌的重要步骤,但氧化渣中锌含量升高和铅含量降低会导致熔化温度增加,使得还原工艺条件发生较大变化。本文对高锌含量铅锌渣(Zn≈25%)的还原工艺条件和渣型制度进行了研究,主要考察了还原煤量、还原温... 详细信息

铅锌氧化渣熔融还原是得到金属铅和锌的重要步骤,但氧化渣中锌含量升高和铅含量降低会导致熔化温度增加,使得还原工艺条件发生较大变化。本文对高锌含量铅锌渣(Zn≈25%)的还原工艺条件和渣型制度进行了研究,主要考察了还原煤量、还原温度、还原时间、Fe/SiO_(2)、CaO/SiO_(2)对铅锌氧化渣中Pb、Zn、Cu回收率的影响。试验结果表明,铅锌渣Pb、Zn、Cu金属回收率随着还原煤量、还原温度、还原时间的增加而增加,但过高的煤比和还原温度不利于Pb、Cu回收率的提高;铅锌渣Pb、Zn、Cu金属回收率随着Fe/SiO_(2)和CaO/SiO_(2)的增加而增加,但Fe/SiO_(2)增加至0.78,CaO/SiO_(2)增加至0.8时,继续增加Fe/SiO_(2)和CaO/SiO_(2)将降低Pb、Zn、Cu金属回收率。试验用铅锌渣的适宜还原条件为煤比1.2~1.4、还原温度1623~1673 K、还原时间90~120 min、Fe/SiO_(2)=0.78~1.17,CaO/SiO_(2)=0.5~0.8。在上述工艺条件下,铅锌氧化渣中Pb、Zn、Cu回收率分别可达84.01%、94.51%、85.8%以上。

关键词：铅锌混合矿高锌含量铅锌渣直接还原金属回收率还原工艺渣型制度

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熔融钒渣钙化及酸浸过程动力学研究

有色金属工程 2024年第3期14卷 70-81页

作者：瞿金为董文霞翁小影豆志河马娜贺州学院广西碳酸钙资源综合利用重点试验室广西贺州542899 东北大学多金属共生矿生态化冶金教育部重点试验室沈阳110819 武汉科技大学国家环境保护矿冶资源利用与污染控制重点试验室武汉430081

针对现有转炉钒渣钙化工艺中存在流程长和能耗高的弊端,直接利用转炉中熔融钒渣的热量,在分离出半钢后,向熔融钒渣中加入氧化钙,使含钒物相发生钙化转型生成易溶于酸的钒酸钙。由Factsage8.1软件计算得到熔融钒渣可能发生的化学反应的... 详细信息

针对现有转炉钒渣钙化工艺中存在流程长和能耗高的弊端,直接利用转炉中熔融钒渣的热量,在分离出半钢后,向熔融钒渣中加入氧化钙,使含钒物相发生钙化转型生成易溶于酸的钒酸钙。由Factsage8.1软件计算得到熔融钒渣可能发生的化学反应的热力学结果。研究过程中采用XRF、ICP、XRD和SEM/EDS等技术进行表征。XRD结果表明,随着CaO添加量的增加,熔融钒渣中逐渐形成CaV_(2)O_(5)、Ca_(7)V_(4)O_(17)、CaVO_(3)和Ca_(3)V_(2)O_(8)。当CaO添加过多后,也会形成Ca_(2)SiO_(4)和CaTiO_(3),这些物相会包裹部分钒,降低钒的浸出率。而后对钙化钒渣进行了酸浸提钒试验,考察了钒渣粒度、浸出温度、酸浓度和液固比对钒浸出率的影响,动力学计算结果可知,酸浸过程的表观活化能为11.56 kJ/mol,表明钙化钒渣的酸浸反应为内扩散控制。

关键词：熔融钒渣钙化浸出率动力学

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钒钛磁铁矿提钒尾渣钙化碱浸试验研究

中国有色冶金 2024年第2期53卷 129-138页

作者：瞿金为翁小影李高帅胡月芳马娜豆志河贺州学院广西碳酸钙资源综合利用重点实验室广西贺州542899 东北大学多金属共生矿生态化冶金教育部重点实验室辽宁沈阳110819 武汉科技大学国家环境保护矿冶资源利用与污染控制重点实验室湖北武汉430081

由于钒钛磁铁矿提钒尾渣中Na2 O含量高,作为炼铁配矿使用时会造成高炉结瘤问题,难以规模化利用。本文针对此问题,以承钢钒钛磁铁矿提钒尾渣为原料,进行了钙化碱浸-偏钒酸铵沉钒试验,目的是对提钒尾脱碱的同时提取其中有价金属钒。试验... 详细信息

由于钒钛磁铁矿提钒尾渣中Na2 O含量高,作为炼铁配矿使用时会造成高炉结瘤问题,难以规模化利用。本文针对此问题,以承钢钒钛磁铁矿提钒尾渣为原料,进行了钙化碱浸-偏钒酸铵沉钒试验,目的是对提钒尾脱碱的同时提取其中有价金属钒。试验主要考察了浸出温度、碱浓度、氧化钙添加量和液固比对钠和钒浸出率的影响,结果表明,在浸出温度160℃、碱浓度100 g·L^(-1)、氧化钙添加量15%、液固比6:1、浸出时间60 min的条件下,钒和钠的浸出率分别达到82.25%和85.36%;对含钒碱浸液进行偏钒酸铵沉钒,得到了纯度大于97%的V_(2)O_(5)产品;终渣中Na_(2)O含量小于0.5%,Fe_(2)O_(3)含量达到30.10%,结合承钢高炉的碱金属平衡数据,可满足高炉炼铁配矿使用。本文研究结果可为相关企业钒钛磁铁矿提钒尾渣的规模化利用提供参考。

关键词：提钒尾渣钙化碱浸偏钒酸铵沉钒 V_(2)O_(5) 炼铁配矿

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中高压开关用Cu基触头材料研究进展

特种铸造及有色合金 2024年第5期44卷 598-605页

作者：夏春勇杨长龙多俊龙豆志河张廷安韩金儒安旺国网辽宁省电力有限公司沈阳供电公司沈阳110002 东北大学冶金学院沈阳110819

综述了Cu基电触头材料的研究进展,介绍和分析了中高压开关用铜基触头材料的发展过程与种类,重点介绍了Cu-Cr、CuW以及Cu-氧化物触头,并进一步对其制备工艺进行分析,比较不同研究方法的优缺点。最后提出了表面改性处理和多组元微合金化... 详细信息

综述了Cu基电触头材料的研究进展,介绍和分析了中高压开关用铜基触头材料的发展过程与种类,重点介绍了Cu-Cr、CuW以及Cu-氧化物触头,并进一步对其制备工艺进行分析,比较不同研究方法的优缺点。最后提出了表面改性处理和多组元微合金化是目前我国铜基触头材料和制备工艺的发展方向。

关键词： Cu基电触头材料表面改性微合金化

Effect of tetrahedral DNA nanostructures on LPS-induced neuroinflammation in mice

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Chinese Chemical Letters 2022年第4期33卷 1901-1906页

作者： Xiao Yang Fan Zhang Yue Du Weitong Cui Yikai dou Yunfeng Lin zhihe Zhao Xiaohong Ma Psychiatric Laboratory and Mental Health Center West China Hospital of Sichuan UniversityChengdu 610041China State Key Laboratory of Oral Diseases National Clinical Research Center for Oral DiseasesWest China Hospital of StomatologySichuan UniversityChengdu 610041China Physical Examination Center West China HospitalSichuan UniversityChengdu 610041China College of Biomedical Engineering Sichuan UniversityChengdu 610041China

Neuroinflammation plays a significant role in inducing depression-like behavior. Tetrahedral DNA nanostructures(TDNs) are molecules that exhibit anti-inflammatory properties and can effectively penetrate the blood-brain barrier. Thus, researchers have hypothesized that TDNs regulate the secretion of proinflammatory cytokines and consequently alleviate depression-like behavior. To test this hypothesis, we investigated the effect of TDNs on the depression-like behavior of C57 mice induced by lipopolysaccharide(LPS). We performed open-field, tail suspension, and sucrose preference tests on LPS-and LPS/TDNtreated mice. The results indicated that the injection of TDNs into LPS-treated mice resulted in increased velocity, center zone duration, frequency to the center zone, and sucrose preference, and decreased immobility time. Immunofluorescence results indicated that peripheral administration of LPS in the mice activated inflammation, which culminated in distinct depression-like behavior. However, TDNs effectively alleviated the inflammation and depression-like behavior through the reduction of the expression levels of proinflammatory cytokines, such as interleukin-1β and tumor necrosis factor-α in the brain. Additionally, TDNs normalized the expression level of microglia cell activation markers, such as ionized calcium binding adaptor molecule 1, in the hippocampus of mice. These results indicated that TDNs attenuated the LPS-induced secretion of inflammatory factors and consequently alleviated depression-like behavior.

关键词： Tetrahedral DNA nanostructures Lipopolysaccharide Depression-like behavior Proinflammatory cytokine Microglia cell

Kinetic study on bastnaesite concentrate mechanochemical decomposition in NaOH solution

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Journal of Rare Earths 2020年第4期38卷 418-426页

作者： Jiang Liu zhihe dou Ting’an Zhang Key Laboratory of Ecological Metallurgy of Multi-Metal Intergrown Ores of Ministry of Education School of MetallurgyNortheastern UniversityShenyang 110819China

Mechanochemical reaction involves simultaneous chemical reaction and particle crushing;the latter increases the effective reaction area and improves the reactivity,thus enhancing its kinetics.The classical shrinking core model was used to model the kinetics of bastnaesite mechanochemical decomposition in NaOH solution,which shows a questionable result.Mechanochemical reaction is a dynamic process,where the particle shape and concentration in reaction interface undergo constant change.Thus,a physically consistent model was applied to describe the kinetics.The variations in OH^-concentration and particle shape were considered in the revision of model.Considering the variation in OH^-concentration in solution with time,the model with varying OH^-concentration agrees better with the experimental data,improving the regression coefficients to between 0.936 and 0.992.By introducing fractal geometry to deal with the irregular system,the model was further optimized,and the regression coefficients increase to between 0.940 and 0.997.All these models considere shrinking particle approaches and controlling mechanisms for the diffusion and chemical reaction.Finally,the fractal model with varying OH^-concentration was selected to describe the mechanochemical decomposition of bastnaesite,which indicates that the process is controlled by chemical reaction.

关键词： Bastnaesite concentrate Mechanochemical decomposition Sodium hydroxide Kinetics Rare earths

Decomposition process of bastnaesite concentrate in NaOH-CaO-H2O system

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Journal of Rare Earths 2019年第7期37卷 760-766页

作者： Jiang Liu Ting’an Zhang zhihe dou Yan Liu Guozhi Lv Key Laboratory of Ecological Metallurgy of Multi-Metal Intergrown Ores of Ministry of Education School of Metallurgy Northeastern University

A novel process of calcification-leaching for bastnaesite concentrate(REFCO3) was proposed. The prior calcification was carried out in the system of NaOH-CaO-H2O and the lgC-pH pattern for Ce-F-Ca-C-H2O system was drawn. The thermodynamics result indicates that decomposition for bastnaesite requires certain alkaline condition, but excessive alkalinity also causes decomposition of CaF2. XRD and SEM-EDS analyses on the calcification-leaching process reveal that bastnaesite first decomposes into RE(OH)3 and CaF2. Then, by HCl leaching rare earths were extracted,while CaF2 was left in the leaching residue. In addition, effects of temperature, time, NaOH and CaO on the calcification were investigated. The results show that the leaching rate of rare earths(REs)reaches 72.5 wt%, at the same time 99.2 wt% of F is left in leaching residue with 20 wt% NaOH and 38 wt% CaO at 493 K for 180 min.

关键词： Bastnaesite concentrate Calcification process Thermodynamics Fluorine Rare earths