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新型管式搅拌反应器的气液传质特性

中国有色冶金 2024年第1期53卷 105-111页

作者：李天赐赵秋月朱帅郑明昭张廷安东北大学冶金学院辽宁沈阳110819 多金属共生矿生态化冶金教育部重点实验室辽宁沈阳110819 中铝东南材料院(福建)科技有限公司福建福州350015

多相体系的混合与传质性能直接影响多相反应过程,团队开发了从搅拌桨叶端出气的新型管式搅拌反应器。采用稳态亚硫酸盐法(FSM)研究反应器的气液传质性能,考察了通气流量Q、搅拌弗劳德数Fr和液含量ε对体积传质系数k_(L)a的影响。结果表... 详细信息

多相体系的混合与传质性能直接影响多相反应过程,团队开发了从搅拌桨叶端出气的新型管式搅拌反应器。采用稳态亚硫酸盐法(FSM)研究反应器的气液传质性能,考察了通气流量Q、搅拌弗劳德数Fr和液含量ε对体积传质系数k_(L)a的影响。结果表明:增大Q和Fr可以有效提高k_(L)a;新型搅拌桨从桨叶端进气方式可以增强k_(L)a,相较传统反应器最大增强约2倍。反应器的气液传质性能在ε=0.5、Fr=0.054、Q=1.6 m^(3)·h^(-1)时最高,此时k_(L)a=0.032 4 s^(-1)。依据试验数据建立了关于k_(L)a的无量纲关联式,误差基本在25%以内,对后续反应器的改进和应用具有参考意义。

关键词：多相反应器曝气弗劳德数气液系统气液传质冶金设备

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： zhang Baojing zhang tingan 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 *** water model was used to simulate the effect of copper slag *** the premise of keeping the Reynolds number consistent,silicone oil and glass beads were used instead of copper slag and vulcanizing *** 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 *** fire dilution of copper slag was done under the *** 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

Preparation of CuCr alloys by thermit-reduction electromagnetic stirring

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Journal of University of Science and Technology Beijing 2007年第6期14卷 538-542页

作者： Zhihe Dou tingan zhang Haien Yu Liping Niu Xiaoli Jiang Huan Yang School of Materials and Metallurgy Northeastern University Shenyang 110004 China

The influences of the additive CaF2, different molds, mold pre-heating temperature, electromagnetic stirring, and alloying elements on CuCr have been investigated respectively during the preparation of CuCr alloys by thermit-reduction electromagnetic stirring. The results indicate that the reasonable reactant mass ratio of CuO： Cr2O3：Al is 100：140：160; CaF2 can reduce the solidification point of slags to improve the metal separating efficiency from slags; the crystal particles become thinner because of the high cooling velocity in the metal mold; while casting in the graphite mold, the casting properties of CuCr improve with the increase of pre-heating temperature; the compact alloys are prepared at 500℃; electromagnetic stirring can prevent the growth of dendrite crystal into refine crystal particles, as well as homogenize Cu and Cr to improve the CuCr properties; the optimal stirring time is 7 min; when the alloying elements Ni and Co are added to the reactants, elements Cu and Cr can distribute evenly but the crystal particles become thick.

关键词： contact material CuCr alloy thermit reduction electromagnetic stirring additive

壳聚糖印迹树脂制备及吸附拜耳铝酸钠溶液钒的研究

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轻金属 2024年第8期 5-10页

作者：杨超张廷安吕国志刘平王松东北大学冶金学院辽宁沈阳110000 中铝东南材料院(福建)科技有限公司福建福州350015

氧化铝生产工艺中,拜耳铝酸钠溶液含有许多稀散的有价金属。如果将这些有价金属回收,可以减少资源浪费以及提高生产的经济效益。本文选用壳聚糖为原料,钒离子为模版离子,使用分子印迹技术成功制备了一种印迹树脂并枝接了季铵基团。研究... 详细信息

氧化铝生产工艺中,拜耳铝酸钠溶液含有许多稀散的有价金属。如果将这些有价金属回收,可以减少资源浪费以及提高生产的经济效益。本文选用壳聚糖为原料,钒离子为模版离子,使用分子印迹技术成功制备了一种印迹树脂并枝接了季铵基团。研究了树脂对拜耳铝酸钠溶液中钒的吸附性能及机理。吸附实验表明在温度25℃、树脂用量10 g/L、吸附时间为40 min条件下,树脂吸附容量有3.23 mg/g。实验结果表明吸附过程符合准二级动力学模型,树脂可以选择性吸附钒离子。

关键词：壳聚糖钒离子分子印迹吸附机理

Experimental Study on Aqueous Phase Entrainment in a Mixer-settler with Double Stirring Mode

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China Petroleum Processing & Petrochemical Technology 2013年第2期15卷 59-62页

作者： Wang Shuchan zhang tingan Zhao Qiuyue Liu Yan Wu Qiuyang School of Materials and Metallurgy of Northeastern University Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Education Ministry

The mixer-settler is a core device of solvent extraction for separating rare earth elements. There are some adverse effects like high rare earth accumulation and poor production efficiency during industrial production. Current researches usually focus on changing the structure of the mixer-settler without making a breakthrough towards gravity clarification. In this paper, in order to improve the efficiency of clarification, a mixer-settler with double stirring mode was designed and manufactured by adding a stirring device in the settler after reducing the volume of the settler. The innovation of this research involves adopting the ultraviolet-visible spectrophotometer to investigate the quantity of aqueous phase entrainment at the settler outlet in order to measure the clarification degree. Experimental results show that the clarification effect with stirring is better than that without stirring. The clarification effect is ameliorated as the stirring speed increases. Generally, the clarification effect shows a best condition when the offset distance is 12.5 cm, making the phase entrainment reduced to less than 0.1%. When the clearance over the tank bottom is 7 cm and 10 cm, respectively, the quantity of aqueous phase entrainment is better than the case with a clearance of 4 cm. The results show that the stirring paddle close to the mixed phase zone can better promote the two-phase separation.

关键词： mixer-settler aqueous phase entrainment stirring speed clearance over the tank bottom offset distance

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昆明软土地区超大深基坑变形监测分析

施工技术（中英文） 2024年第10期53卷 89-94页

作者：缪应璟宋志强张廷安金晓飞桂跃中国建筑一局(集团)有限公司北京100161 昆明理工大学建筑工程学院云南昆明650051

以昆明综合交通国际枢纽深大基坑为工程背景,分析昆明软土层中基坑周边环境的变形特性、立柱变形和支撑轴力变化情况。各测点的变形量均随开挖深度的增加而逐步增大,且基坑顶部变形最大,变形整体形态为“开口形”。地下连续墙变形随开... 详细信息

以昆明综合交通国际枢纽深大基坑为工程背景,分析昆明软土层中基坑周边环境的变形特性、立柱变形和支撑轴力变化情况。各测点的变形量均随开挖深度的增加而逐步增大,且基坑顶部变形最大,变形整体形态为“开口形”。地下连续墙变形随开挖深度的增加而增大,先缓慢增长,然后突然剧增。支撑与封板上车辆及料场荷载导致立柱竖向沉降。支撑最大轴力值与围护体侧向变形最大值分布形态基本匹配。各观测井水位变化幅度较小;基坑东侧靠近B塔楼区域存在漏水情况,水位变化幅度较大。随着各区域后续工况基坑逐步开挖,车站变形逐步增加,但变形较小,区间变形未发生较大变化。

关键词：深基坑支护软土监测变形

Enhancement of Absorption of Injected Gas in New Type Mechanical Stirring Injection Refine Equipment

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Enhancement of Absorption of Injected Gas in New Type Mechan...

主观疲劳量表评价足球运动员训练和比赛状态内部训练负荷的实例研究——以中国男子U21选拔队为例

2011 International Conference on Fuzzy Systems and Neural Computing(FSNC 2011)

作者： zhang tingan Liu Yan Wang qiang He JiCheng Masamichi Sano School of material and metallurgy Northeastern University Nogoya University

The bubble disintegration is of great scientific importance in metal refining, In order for further improvement, Research on bubble disintegration and dispersion becomes necessary, The intensification of bubble disintegration experiment that we have done in cold water model by study absorption rate,The purpose is to research bubble disintegration under difference experimental condition. In this paper, we use mass transfer coefficients stand for absorption rate, we also study utilization rate, we want to research the best experimental condition which can enhance mass transfer coefficients and utilization rate. On the basis of experimental result, Provided a scientific and experimental basis to high-temperature experiment of bubble dispersion and *** results show:the rate of absorption of CO2 injected in aqueous Na OH solution can be increased greatly by mechanical stirring when the positive-reverse rotation mode is adopted. Dispersion of small bubbles in the liquid is very effective for increasing the absorption rate.

关键词： bubble disintegration and dispersion absorption rate injection refine

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中国体育科技 2022年第10期58卷 14-20页

作者：孙鹏张廷安北京体育大学北京100084

目的:提高足球训练和比赛中内部训练负荷监控的客观性。方法:采用文献资料调研、测试等方法,以中国男足U21选拔队21名队员(年龄19.77±0.60岁,身高179.91±5.10 cm,体质量71.50±5.10 kg,BMI22.10±1.00)为研究对象,按前场、中场和后场... 详细信息

目的:提高足球训练和比赛中内部训练负荷监控的客观性。方法:采用文献资料调研、测试等方法,以中国男足U21选拔队21名队员(年龄19.77±0.60岁,身高179.91±5.10 cm,体质量71.50±5.10 kg,BMI22.10±1.00)为研究对象,按前场、中场和后场3个位置进行分组,同时将运动形式分为训练和比赛两种状态,分别将RPE指标与心率指标进行相关性分析。结果:1)训练和比赛两种状态下,RPE与平均最大心率百分比之间相关性均较低;2)比赛状态下,所有队员s-RPE与Banister’s Trimp和Edwards’s TL均显著相关(P<0.05),训练状态下,显著相关的比例分别为66.7%和52.4%(P<0.05);3)训练状态下,中场队员s-RPE与Banister’s Trimp和Edwards’s TL显著相关(P<0.05)的比例最高,分别为83.3%和66.7%,|R|的中位数分别为0.81和0.78。结论:s-RPE评价比赛状态下内部负荷量更为客观;训练状态下s-RPE评价中场球员内部负荷量更为客观。

关键词：主观疲劳感觉 s-RPE量表训练负荷训练冲量

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多级深度还原法制备Ti6Al4V合金粉体

稀有金属材料与工程 2021年第8期50卷 2973-2978页

作者：闫基森豆志河张廷安牛丽萍东北大学冶金学院辽宁沈阳110819 东北大学多金属共生矿生态化冶金教育部重点实验室辽宁沈阳110819

依据变价金属Ti和V的氧化物在还原过程中逐级还原的特性,提出使用金属氧化物(TiO_(2),V2O_(5))作为原料的多级深度还原法制备Ti6Al4V合金粉体的新思路。首先计算了TiO_(2)-V2O_(5)-Mg-Ca体系的吉布斯自由能变,结果表明先进行镁热自蔓延... 详细信息

依据变价金属Ti和V的氧化物在还原过程中逐级还原的特性,提出使用金属氧化物(TiO_(2),V2O_(5))作为原料的多级深度还原法制备Ti6Al4V合金粉体的新思路。首先计算了TiO_(2)-V2O_(5)-Mg-Ca体系的吉布斯自由能变,结果表明先进行镁热自蔓延反应,后进行钙热深度还原反应制备Ti6Al4V合金粉体在热力学上具备可行性。然后通过实验进行了验证。镁热自蔓延反应产物酸浸后除去MgO可得到氧含量为15.92%的多孔Ti-Al-V-O前驱体。配入金属Ca后进行深度脱氧可得到低氧的Ti6Al4V合金粉体(Al:6.2%,V:3.64%,O:0.24%,Mg:0.01%,Ca含量<0.01%,质量分数)。

关键词：多级深度还原酸洗自蔓延反应 Ti6Al4V合金粉体