EQUILIBRIUM MODELS AND PARAMETERS OPTIMIZATION FOR EXTRACTION PROCESS OF BISMUTH AND ANTIMONY WITH N1923

ＥＱＵＩＬＩＢＲＩＵＭＭＯＤＥＬＳＡＮＤＰＡＲＡＭＥＴＥＲＳＯＰＴＩＭＩＺＡＴＩＯＮＦＯＲＥＸＴＲＡＣＴＩＯＮＰＲＯＣＥＳＳＯＦＢＩＳＭＵＴＨＡＮＤＡＮＴＩＭＯＮＹＷＩＴＨＮ１９２３ＥＱＵＩＬＩＢＲＩＵＭＭＯＤＥＬＳＡＮＤＰＡＲＡＭＥＴＥＲＳＯＰＴＩ...     

GALVANIC CORROSION BETWEEN GRAPHITE EPOXY COMPOSITE MATERIALS AND LY12CZ ALUMINUM ALLOY

ＧＡＬＶＡＮＩＣＣＯＲＲＯＳＩＯＮＢＥＴＷＥＥＮＧＲＡＰＨＩＴＥＥＰＯＸＹＣＯＭＰＯＳＩＴＥＭＡＴＥＲＩＡＬＳＡＮＤＬＹ１２ＣＺＡＬＵＭＩＮＵＭＡＬＬＯＹＦ．Ｌｕ;Ｗ．Ｙ．Ｓｈｅｎ;Ｊ．Ｇ．ＬｉａｎｄＷ．Ｄ．Ｚｈｅｎ（ＢｅｉｊｉｎｇＩｎｓｔｉｔｕｔｅ...     

COMPARISONS AMONG THE SOLUTIONS OF FIBER TEXTURE VECTOR

ＣＯＭＰＡＲＩＳＯＮＳＡＭＯＮＧＴＨＥＳＯＬＵＴＩＯＮＳＯＦＦＩＢＥＲＴＥＸＴＵＲＥＶＥＣＴＯＲＷＡＮＧＹａｎｄｏｎｇ,Ａ．ＶａｄｏｎａｎｄＪ．Ｊ．Ｈｅｉｚｍａｎｎ（ＬＭＰＣ／ＩＳＧＭＰ,ＵｎｉｖｅｒｓｉｔｅｄｅＭｅｔｚ,Ｆ－５７０４５ＭｅｔｚＣＥＤ...     

WAVE FIELD EXTRAPOLATION IN VISCOELASTIC MEDIUM AND VARIABLE FOCUS METHOD TO SEPARATE SEISMIC COMPOUND WAVE

ＷＡＶＥＦＩＥＬＤＥＸＴＲＡＰＯＬＡＴＩＯＮＩＮＶＩＳＣＯＥＬＡＳＴＩＣＭＥＤＩＵＭＡＮＤＶＡＲＩＡＢＬＥＦＯＣＵＳＭＥＴＨＯＤＴＯＳＥＰＡＲＡＴＥＳＥＩＳＭＩＣＣＯＭＰＯＵＮＤＷＡＶＥ￥ＳｏｎｇＳｈｏｕｇｅｎ；ＹｕａｎＸｉｕｇｕｉ；ＨｅＪｉｓｈａｎ...     

A NEW ORTHOTROPIC YIELD FUNCTION DESCRIBABLE ANOMALOUS BEHAVIOR OF MATERIALS

ＡＮＥＷＯＲＴＨＯＴＲＯＰＩＣＹＩＥＬＤＦＵＮＣＴＩＯＮＤＥＳＣＲＩＢＡＢＬＥＡＮＯＭＡＬＯＵＳＢＥＨＡＶＩＯＲＯＦＭＡＴＥＲＩＡＬＳＡＮＥＷＯＲＴＨＯＴＲＯＰＩＣＹＩＥＬＤＦＵＮＣＴＩＯＮＤＥＳＣＲＩＢＡＢＬＥＡＮＯＭＡＬＯＵＳＢＥＨＡＶＩＯＲＯＦ...     

UNIVERSAL FORMULAE OF ROBUST ESTIMATES OF PARAMETER VECTOR AND VARIANCE COMPONENTS

ＵＮＩＶＥＲＳＡＬＦＯＲＭＵＬＡＥＯＦＲＯＢＵＳＴＥＳＴＩＭＡＴＥＳＯＦＰＡＲＡＭＥＴＥＲＶＥＣＴＯＲＡＮＤＶＡＲＩＡＮＣＥＣＯＭＰＯＮＥＮＴＳ①ＷａｎｇＺｈｉｚｈｏｎｇＩｎｓｔｉｔｕｔｅｏｆＳｕｒｖｅｙｉｎｇＥｎｇｉｎｅｒｉｎｇａｎｄＬａｎｄＩｎｆ...     

SIMULATION OF CYLINDRICAL UPSETTING OF POROUS MATERIALS BY FINITE ELEMENT METHOD

ＳＩＭＵＬＡＴＩＯＮＯＦＣＹＬＩＮＤＲＩＣＡＬＵＰＳＥＴＴＩＮＧＯＦＰＯＲＯＵＳＭＡＴＥＲＩＡＬＳＢＹＦＩＮＩＴＥＥＬＥＭＥＮＴＭＥＴＨＯＤ①ＺｈａｎｇＸｉｎｇｑｕａｎ,ＰｅｎｇＹｉｎｇｈｏｎｇａｎｄＲｕａｎＸｕｅｙｕＮａｔｉｏｎａｌＤｉｅ＆Ｍｏｌｄ...     

NEURAL NETWORK ASSESSMENT OF ROCKBURST RISKS FOR DEEP GOLD MINES IN SOUTH AFRICA

ＮＥＵＲＡＬＮＥＴＷＯＲＫＡＳＳＥＳＳＭＥＮＴＯＦＲＯＣＫＢＵＲＳＴＲＩＳＫＳＦＯＲＤＥＥＰＧＯＬＤＭＩＮＥＳＩＮＳＯＵＴＨＡＦＲＩＣＡ①ＦｅｎｇＸｉａｔｉｎｇＣｏｌｅｇｅｏｆＲｅｓｏｕｒｃｅｓａｎｄＣｉｖｉｌＥｎｇｉｎｅｒｉｎｇ,Ｎｏｒｔｈｅａｓｔ...     

TiAl ALLOYS PREPARED BY THERMAL EXTRUSION OF ELEMENTAL POWDER MIXTURES

ＴｉＡｌＡＬＬＯＹＳＰＲＥＰＡＲＥＤＢＹＴＨＥＲＭＡＬＥＸＴＲＵＳＩＯＮＯＦＥＬＥＭＥＮＴＡＬＰＯＷＤＥＲＭＩＸＴＵＲＥＳ①ＬｉｕＺｈｉｊｉａｎ，ＱｕＸｕａｎｈｕｉ，ＨｕａｎｇＢａｉｙｕｎＰｏｗｄｅｒＭｅｔａｌｌｕｒｇｙＲｅｓｅａｒｃｈＩｎｓｔｉｔｕ...     

RECENT DEVELOPMENTS IN AEROSPACE PROPULSION MATERIALS

ＲＥＣＥＮＴＤＥＶＥＬＯＰＭＥＮＴＳＩＮＡＥＲＯＳＰＡＣＥＰＲＯＰＵＬＳＩＯＮＭＡＴＥＲＩＡＬＳＴ．Ｋｈａｎ（Ｏｎｅｒａ,Ｂ．Ｐ．７２,９２３２２ＣｈａｔｉｌｌｏｎＣｅｄｅｘ,ＦｒａｎｃｅＭａｎｕｓｃｒｉｐｔｒｅｃｅｉｖｅｄ２６Ａｕｇｕｓｔ１９９６）...     

A THEORETICAL INVESTIGATION OF BUBBLE ELECTROPHORESIS

ＡＴＨＥＯＲＥＴＩＣＡＬＩＮＶＥＳＴＩＧＡＴＩＯＮＯＦＢＵＢＢＬＥＥＬＥＣＴＲＯＰＨＯＲＥＳＩＳ￥ＸｕＪｉｒｕｎ；ＫｅｌｓａｌｌＧＨ（Ｐ．Ｏ．Ｂｏｘ１３９，ＮｏｒｔｈｅａｓｔｅｒｎＵｎｉｖｅｒｓｉｔｙ，Ｓｈｅｎｙａｎｇ１１０００６ＩｍｐｅｒｉａｌＣｏ...     

管道内激光诱导空化泡动力学研究

论述了一种新型的微泵原理,该微泵将激光聚焦于管道内液体介质产生空化泡,利用空化泡生长和溃灭过程中产生的流体推进速度和推进力驱动流体运动。采用Volume Of Fluid方法模拟了管道内空化泡的动力学特性,计算了不同管径对管道内空化泡动力学特性的影响。研究结果表明:管道内空化泡在生长和溃灭过程中所产生的流速可以高速推动流体运动,随着管道的管径越小,管道内空化泡的第一次脉动周期越长,空化泡越稳定;同时,管道内空化泡生长和溃灭过程中附近流体的流速也随着管径减小而呈现增大的趋势。     

空泡应用于管道内粒子移除的研究

研究了刚性管道中粒子在振动空泡的作用下移除的过程,振动空泡由一个55 V的低压电路产生。高速相机记录了空泡作用下粒子的动力学行为及空泡的形状变化过程,高速相机的帧率设为15000 f／s。结果表明：粒子的移除速度受空泡产生的初始位置和空泡在管道中的轴向长度的影响。     

Numerical modeling of effect of slot on bubble motion in aluminum electrolytic process

A transient three-dimensional (3D) model was established to understand the bubble motion in an industrial electrolytic process. An anode with a new design was tested. It incorporates two slots that allow an efficient removal of gas bubbles. The electromagnetic fields were described by solving Maxwell's equations. The bubble movement was studied with two-way coupling Euler–Lagrange approach. The interplay of current density and bubble nucleation rate was included. The collision and coalescence of bubbles were considered. Random walk module was invoked for involving the chaotic effect of the turbulence. The numerical results were validated by experimental measurements. The results indicate that the current distribution and the bubble nucleation periodically change. Due to the slot, the bubble elimination heavily increases. The contribution of the slot to the bubble removal exceeds 50% in the case of three currents, and the promotion of the slot decays with increasing the current.     

中间包微气泡冶金技术发展

中间包中生成微小气泡可显著促进夹杂物上浮去除。对中间包微气泡精炼技术进行了分析总结,并针对研究较为深入的长水口吹氩技术相关文献进行了详细分析。结果表明,利用中间包中钢液湍动能破碎气泡可形成高效去除夹杂物技术,一些新技术正在研发过程中,长水口吹氩技术具有良好前景;“冷钢片沾钢”工业试验表明,中间包长水口吹氩可在中间包钢液中生成弥散细小氩气泡,生成的绝大部分氩气泡尺寸小于2 mm;长水口吹氩生成微小气泡的过程可分为气泡在长水口壁孔脱附和脱附气泡在湍急钢流中被剪碎成微小气泡两个阶段,其中钢液湍动能对氩气泡的剪切破碎作用十分明显;长水口吹氩技术水模型研究较多,数值模拟研究相对较少,工业试验研究才刚刚开始,有待更进一步的深入研究。     

Cold model on bubble growth and detachment in bottom blowing process

The bubble growth and detachment behavior in the bottom blowing process were investigated. Four multi-hole nozzle configurations with different opening ratios were assessed experimentally using high-speed photography and digital image processing. For these configurations, the experiments reveal that the bubble growth consists of a petal-like stage, an expansion stage and a detachment stage. The petal-like shape is qualitatively described through the captured images, while the non-spherical bubbles are analyzed by the aspect ratio. The bubble size at the detachment is quantified by the maximum caliper distance and the bubble equivalent diameter. Considering the dependence on the opening ratio, different prediction models for the ratio of maximum caliper distance to hydraulic diameter of the nozzle outlet and the dimensionless bubble diameter are established. The comparative analysis results show that the proposed prediction model can accurately predict the bubble detachment size under the condition of multi-hole nozzles.     

富氧底吹熔炼炉内气液两相流动的数值模拟

以某公司的富氧底吹熔池熔炼炉为原型,运用数值模拟的方法对炉内氧气铜锍两相流动进行三维瞬态模拟,研究炉内气泡主要参数、气含率分布规律、氧枪出口附近压力变化以及液面波动情况。并借助于高速摄像仪设备,对水模型实验中气泡形成、合并、变形及破碎过程进行研究,所得结果与模拟结果进行比较。结果表明:所建立的数学模型是合理的。氧气铜锍两相流动模拟结果表明,炉内气泡形成时间为0.12~0.25 s,生成频率为4~5 Hz,其短轴大小集中在3.5d~6.5d(d为氧枪直径尺寸);气泡停留时间为0.2~0.4 s,其在熔池内的平均上浮速度约为4 m/s;7°和22°氧枪出口气泡后座现象出现的平均频率分别为5 Hz和7 Hz,作用时间为0.06 s;高效反应区存在于熔池上部区域;气相搅动液相所形成的表面重力波在沉淀区传播的过程中,波幅衰减很快,当波传播到出渣口附近时,液面趋于静止。     

鼓泡油膜萃取法处理氰化提金废水的新工艺

介绍一种鼓泡油膜萃取法处理氰化提金废水的新方法。结果表明:鼓泡油膜萃取法不仅可回收废水中高浓度的铜,还可经济回收极低浓度的金。废水中铜的脱除率达99%,金的萃取率达99%,氰根脱除率达91.9%。萃余液可返回选矿工艺重复利用,实现含氰废水的零排放。负载有机相经酸性硫脲反萃后可循环使用。采用锌粉置换法回收硫脲反萃余液中的金和铜。锌粉置换渣采用稀酸溶解法可实现金和铜的分离。金的总回收率达98.06%,铜的总回收率达94.74%。锌粉置换后液可制备硫化锌产品,锌回收率达96%。该工艺成本低,绿色环保,具有潜在的应用推广前景。     

Observation and theoretic analysis of gas-bubble formation and growth in water-model

The behavior of bubbles is observed with high-speed digital camera in water-model. It is found that each bubble has three processes： bubble formation, bubble coalescence and bubble division. Bubble shape is spherical firstly, then elliptical and spherical crown after coalescence, and spherical again after division. These phenomena are explained theoretically. And the bubble size is defined newly. The so-defined bubble size is measured through digital camera and LECO graphical analyzer. And the measured results are compared with those in literatures.     

铝电解槽阳极气泡行为研究新动态

本文介绍了铝电解槽阳极气泡行为研究的新进展。大部分研究停留在水溶液模拟试验及基于这些试验数据的模拟计算上，对于工业铝电解槽阳极气泡行为的研究还应该继续。