Fe—Si—C熔体的作用浓度计算模型

根据含化合物金属熔体铁共存理论，相图和Ｆｅ－Ｃ系亚稳态化合物的有关热力学数据制定了Ｆｅ－Ｓｉ－Ｃ熔体的作用浓度计算模型，计算结果符合实际，从而证明所推导的计算模中以反映体熔体的结构实际。     

Fe-La-O金属熔体作用浓度计算模型

根据含化合物金属熔体的共存理论,Fe-La相图、Fe-O相图,及相关文献的研究成果,确定了Fe-La-O金属熔体的结构单元,进而推导了各组元作用浓度的计算模型.研究表明,计算的作用浓度与相应的实测活度相符合,从而证明所得模型可以反映Fe-La-O金属熔体的结构本质,同时说明计算过程中引用的La2O3的平衡参数"ΔG°=-75 380+17.60T"是准确的.     

Fe-Si-C熔体的作用浓度计算模型

根据含化合物金属熔体结构的共存理论、相图和Fe－C系亚稳态化合物的有关热力学数据制定了Fe－Si－C熔体的作用浓度计算模型，计算结果符合实际，从而证明所推导的计算模型可以反映本熔体的结构实际．就碳而言，就碳而言，以饱和为标准态的碳作用浓度Nc′可以通过考虑纯物质到饱和标准态的转换系数Lc来求得．     

Mg-Al,Sr-Al和Ba-Al熔体的作用浓度计算模型和热力学参数确定

根据相图、质量作用定律和金属熔体结构的共存理论制定了Mg-Al,Sr-Al和Ba-Al熔体的作用浓度计算模型并求得了相关的热力学参数,计算结果符合实际,证明所制定的模型和确定的热力学参数可以反映相应熔体的结构特点,但将相应文献的热力学参数代入同样熔体则未取得符合实际的结果,原因可能与文献中的热力学参数不符合液态下金属熔体内部化学反应的实际有关。     

反应物浓度对液相合成Al2O3-SiO2-CaF2-P2O5系粉体特性的影响

选用AlCl3、Na2SiO3、CaCl2、NaF和Na5P3O10作为初始反应物,采用液相沉淀法合成了Al2O3-SiO2-CaF2-P2O5系玻璃粉体;通过XRD、EDAX和TEM等手段,分析了反应物浓度对液相合成Al2O3-SiO2-CaF2-P2O5系玻璃粉体特性的影响.结果表明,反应物浓度对粉体的化学组成、结晶状态均无明显影响,各粉体均是含有O、F、Al、Si、Ca、P元素的非晶态的近球形纳米颗粒.但反应物浓度对粉体的分散性能、颗粒大小有影响,随着反应物浓度的提高,粉体团聚现象加剧,分散性降低,粉体颗粒大小略微减小,粒子在20~60 nm.     

CaO-BaO-Al2O3-SiO2-MgO-CaF2精炼渣系熔化温度研究

利用正交试验的方法进行CaO-BaO-Al2O3-SiO2-MgO-CaF2精炼渣系熔化温度的研究,结果表明,BaO的质量分数在0～15％范围内精炼渣系的熔化温度随BaO含量升高而降低;CaO/Al2O3含量比值由1增加到2,精炼渣系熔化温度逐渐升高,而CaO/Al2O3含量比值由2增加到4,精炼渣系熔化温度又开始下降;SiO2的质量分数由8％～20％,精炼渣系熔化温度随SiO2含量升高而升高.     

α—Fe2O3—Al2O3—Na2O纳米陶瓷制备及其湿敏特性

采用溶胶－凝胶法制备了α－Ｆｅ２Ｏ３－Ａｌ２Ｏ３－Ｎａ２Ｏ复合超微粉,对微粉及其烧结后的物相及粒度进行了分析。湿敏特性测试结果表明：纳米级α－Ｆｅ２Ｏ３－Ａｌ２Ｏ３－Ｎａ２Ｏ陶瓷元件的感湿灵敏度高于简单氧化物机械混合后制成的α－Ｆｅ２Ｏ３－Ａｌ２Ｏ３－Ｎａ２Ｏ陶瓷元件,并具有较快的响应特性及较好的稳定性。     

1873 K下CaF2-MgO-CaO-Al2O3-SiO2渣系对H13模具钢的脱氧研究

本文根据热力学和动力学理论,结合实验室实验,研究了1873 K下CaF2-MgO-Al2O3-CaO-SiO2渣系成分对H13工具钢脱氧极限的影响.理论计算结果与实验结果基本一致.研究结果表明,[Si]-[O]反应为脱氧控制反应,随着炉渣碱度的增大,脱氧极限降低.当碱度为2.0时,脱氧极限最低.在碱度为2.0且CaF2...     

Calculating Model of Mass Action Concentrations for Mn-C Melts and Optimization of Thermodynamic Parameters

Based on the phase diagram, the coexistence theory of the metallic melt structure involving compoundformation and the regularity of melts containing saturated phase, a calculating model of mass action concentrationsfor Mn-C melts was formulated. According to the activities (or activity coefficients AM. and γc.), obtained by theUnified Interaction Parameter Model (UIPM), the thermodynamic parameters G and G at higher temperatures (1628～1873 K) were optimized by the repeated try and error method. It is testified that G G(873～1273 K) and G (298～1623 K), obtained at lower temperatures, can also be used at the above-mentionedhigher temperatures. The calculated N. and N agree well with ac. and ac obtained by UIPM. This result showsthat the deduced model can reflect the structural reality of Mn-C melts.     

Calculating Model of Mass Action Concentrations for Fe-Cr-P Melts and Optimization of Thermodynamic Parameters

According to the results of research on the thermodynamic propelles of Fe-Cr, Fe-P and Cr-P melts, the measured achvihes of Fe-Cr-P melts from reference sources as well as the coexistence theory of metallic melts structure involving compound formation, a calculating model of the mass action concentrations for Fe-Cr-P melts has been formulated and some of its thermodynamic parameters have been optimized. The calculated mass action concentrations agree with the measured achvities, which shows that this model can reflect the structural reality of Fe-Cr-P melts.     

Calculating Models of Mass Action Concentrations for Fe-P and Cr-P Melts and Optimization of Their Thermodynamic Parameters

Based on the phase diagrams, reliable reference experimental data and the coexistence theory of metallic melts structure involving compound formation, calculating models of mass action concentrations for Fe-P and Cr-P melts have been formulated. At the same time, some of their thermodynamic parameters have been optimized. The calculated results not only agree well with the measuredvalues, but also obey the mass action law rigorously, this in turn shows that these models can reflect the structural characteristics of corresponding melts.     

Calculating Models of Mass Action Concentrations for Ni-Mn and Co-Mn Melts and Optimization of Their Thermodynamic Parameters

According to phase diagrams, measured activities as well as the coexistence theory of metallic melts structure involving compound formation, the calculating models of mass action concentrations for Ni-Mn and Co-Mn melts are formulated and their thermodynamic parameters are optimized. As a result, the calculated mass action concentrations agree well with the corresponding measured activities, showing that these models can reflect the structural characteristics of both Ni-Mn and Co-Mn melts.     

Carbon Solubility and Mass Action Concentrations of Fe-Cr-C Melts

An empirical equation of carbon solubility in Fe-Cr-C melts is regressed based on the experimental data from references. Acalculating model of mass action concentrations for these melts is formulated on the basis of the coexistence theory of metaIlic melts in-volving compound formation, the phase diagram of Cr-C system as well as thermodynamic data of Fe-Cr-C melts. According to the mod-el, the standard Gibbs free energies of formation of CrC and Cr3C2 are obtained. Satisfactory agreement between the calculated and me-asured values shows that the model can reflect the structural characteristics of Fe-Cr-C melts.     

三元系冶金渣导热系数的研究

以高炉渣的主要成分CaO-Al2O3-SiO2三元渣系为研究对象,用瞬态热丝法,研究此体系下温度及组成对导热系数的影响.研究结果表明,在低温区,导热系数随温度的升高而呈直线形式略有增加;在高温区,导热系数随温度的升高而迅速降低,且导热系数随组分中非桥氧NBO/T数的降低而增大.     

Application of the annexation principle to the thermodynamic property study of ternary metallic melts In—Bi—Cu and In—Sb—Cu

Based on the phase diagrams,measured activities and the annexation principle,calculating models of mass action concentrations for In-Bi-Cu and In-Sb-Cu melts have been formulated.Calculated results not only agree well with practical values,but also obey the mass action law,showing that the deduced model can reflect the structural reality of given melts and that the annexation principle is applicable to these two ternary metallic melts.So long as there is one from three binary systems constituting the ternary melts,in which the activities of one component exhibit positive deviation relative to Raoultian behavior,heterogeous melts inevitably would form,soheterogeneous calculating model should be used to calculate their mass action concentrations.On the contrary,if all the binary melts are homogeneous and their activities exhibit negative deviation with respect to the Raoult‘s law.then the ternary melts formed from them will certainly be homogeneous,hence single phase model should be applied.     

熔池炼铜炉渣成分控制的数学模拟

本文根据白银炼铜法的生产实践,提出了炼铜炉渣Fe/SiO_2与(SiO_2+CaO)/Fe计算控制的方法和数学模型,给出了计算机程序运行框图和模拟计算控制的结果。     

铜闪速熔炼神经网络模型的建立

在分析铜闪速熔炼控制策略和贵溪冶炼厂闪速炼铜生产实践数据的基础上。基于神经网络技术分别建立了网络结构为8—16—1的冰铜品位模型、8—20-1的冰铜温度模型和8—20—1的渣中Fe/SiO2模型，并采用了遗传算法GA与前向神经网络算法BP相结合的网络训练方法对其进行了仿真计算。结果显示其检验样本的最大误差分别为0．57、0．84和0．07。最大相对误差分别为0．99％、0．07％和5．1％。均方误差分别为0．37、0．66和0．04。表明所建立模型的预测值与生产实践数据基本吻合。该模型可以应用于铜闪速熔炼过程的在线优化控制．