从失效催化剂中回收铂的工艺

本文对Ｒ－３２和１－５的二种催化剂（含Ｐｔ≈０．３％）回收铂的工艺进行了实验室研究。采用高温焙烧－盐酸＋氧化剂浸出－溶剂萃取铂新工艺。一次浸出作业可使废渣含Ｐｔ降至５０ｇ／ｔ以下，用Ｎ２３５萃取代替现行的锌粉置换，铂回收率可提高１％以上；用水解法精制后，可获得９９．９８％铂产品，实收率９７％以上。     

铜镍合金氯化渣富集贵金属

针对含贵金属０．１２％的高冰镍磨浮磁选铜合金氯化浸出渣富集贵金属生产流程中的不足,提出了新的工艺流程结构,包括煤油脱除元素硫－熔炼含贵金属高锍－加压酸浸三个步骤,贱金属分离效率（％）：Ｃｕ９９．５、Ｎｉ９９．８、Ｆｅ９４．５、Ｓ９９．６、ＳｉＯ２９８．８;贵金属回收率（％）：Ｐｔ９８．０、Ｐｄ９７．０、Ａｕ９７．０,产出贵金属品位〉３０％,贵贱比〉１的精矿。     

原子吸收光谱法测定金属锰中的锰含量

用盐酸分解试样，锰以氯化锰的形成在于溶液中，用ＧＧＸ－５型原子吸收光谱仪直接喷雾，被空气－乙炔火焰燃烧激发生成基态原子蒸气层，吸收锰空心阴极灯发射的特征发射光波。吸收的强度与锰的浓度成正比，研究结果表明，测得回收率为９７．５％～１００％，对试样的测定相对标准偏差为０．３６％，有很高的准确度和精密度。     

高强度结构钢复相热处理工艺研究

研究了４０ＣｒＮｉＭｏＡ钢的等温淬火和亚温淬火复相热处理工艺。通过调整工艺参数,获得孙同组织体积比的Ｍ－Ｂ和Ｍ－Ｆ复相组织。结果表明,具有２．０５％Ｆ－９７．９５％Ｍ亚温淬火组织具有良好的综合力学性能。     

协同系数补偿的动力学方法用于钼和钨同时测定的研究

以Ｉ３－淀粉配合物为指示剂，用停流ＦＩＡ光度法研究了钼（ＶＩ）和钨（ＶＩ）对Ｈ２Ｏ２－Ｉ氧化还原反应体系的协同催化效应，并定义了协同催化系数Ｄ以表示这种协同作用的大小。将此系数引入到停流ＦＩＡ－动力学体系多组份同时测定的方法中，可有效地补偿吸光度对加和性的偏离，并可降低检出限。用本法测定钼（Ⅵ）和钨（Ⅵ）的线性范围分别为０～１．１μｇ·ｍｌ－１和０～２．０μｇ·ｍｌ－１，而未补偿时则分别为０～０．６μｇ·ｍｌ－１和０～０．８μｇ·ｍｌ－１。测定了钢样及模拟样品中的用和钨含量，结果满意。钼、钨的回收率分别为９７．３％～１０２．８％，９６．５％～１０２．１％，相对标准偏差ＲＳＤ分别为２．１％～２．９％，２．３％～３．４％。     

流动注射—纤维微型柱分离富集—原子吸收法快速测定样品中微量金

建立了以饱和溴水、氯化钠组成的非酸溶金试剂溶解试样，ＦＩＴ－ＡＡＳ法测定微量金的分析方法。讨论了金在流动注射中分离富集的最佳条件。方法的精密度为２．８０％，回收率为９７％～１０２％，绝大多数常见离子无干扰。分析速度为每ｈ６０个样，适于金含量０．０ｘ～ｘｘｇ／ｔ范围。     

提高硅炉作业率和延长炉龄的措施及效果

分析影响硅炉日历作业率和硅炉炉龄的因素，并找出其中的主要影响因素，针对主要影响因素采取相应的技术措施，使硅炉日历作业率提高到９５％－９７％，硅炉炉龄提高到３－４年。     

电解法回收Ag-W合金中的银

通过对电解液体系的研究,确定了以Ｓ２Ｏ３＾２－－（Ａｇ（Ｓ２Ｏ３）２）＾３－为主的电解液体系电解回收Ａｇ－Ｗ合金中Ａｇ的方法,可以直接得到金属Ａｇ,其品位９９％以上,电流效率９７％以上。     

含微量卤化银废水回收银的工艺

用多种铁盐处理含卤化银废水沉淀银及制取纯银，讨论其反应原理，技术条件及试验结果，全流程Ａｇ回收率≥９７％，产品Ａｇ纯度≥９９．９％。     

MIM工艺对W—Ni—Fe高密度合金力学性能的影响

研究了粉末装载量和烧结温度对ＭＩＭ钨基高密度合金力学性能的影响,并将ＭＩＭ工艺与传统压制／烧结工艺进行了比较,实验结果表明,采用装载量为４７％（体积分数）的喂料,在１５３０℃烧结２ｈ得到的９７Ｗ－２Ｎｉ－１Ｆｅ高密度合金具有优良的力学性能的达到的性能为σｂ＝９３６ＭＰａ,σ０．２＝６４９ＭＰａ,δ＝１１．４％,ＨＲＣ＝３１,优于传统压制／烧结工艺制得的合金。     

新型的治疗阿尔茨海默氏症药物(1-二甲基磷酰基-2,2,2-三氯)-乙基-1-醇烟酸醋对体外神经细胞的作用

目的: 观察本实验室合成的一种治疗阿尔茨海默氏症(AD)的药物(1-二甲基磷酰基-2, 2, 2 -三氯)-乙基^-1-醇烟酸醋(NMF),对体外培养的皮层神经细胞活性的影响以及对海人藻酸(KA)所致的神经损伤的保护作用。方法: 采用体外培养皮层神经元的方法,解剖分离 15 d胚胎小鼠皮层神经细胞, 接种于 96孔板,48 h 后加药并培养 72 h,以 MIT 法 观察 NMF 对小鼠皮层神经细胞活性的影响;同时将接种于 24 孔板的细胞预先给予 NMF,d 3 时加或不加KA处理后,以台盼蓝染色鉴别并计数死、活细胞,可得出细胞的存活率。结果: NMF 明显促进胎鼠皮层神经元活性,其中 NMF1、0. 1、10nmol·L^-1促进神经元活性增殖率分别高达 34.7%、37.4%、36. 7%, NMF 明显促进正常胎鼠皮层神经元存活卒,与对照组比较,10nmol·L^-1 NMF 对皮层神经元的存活率分别提高 39.3%、73.5%。 NMF能显著 对抗 KA 所致的神经元损伤,与 KA 损伤组相比, NMF0.1、10、10nmol·L^-1对损伤皮层神经元的保护率分别为 77.30%、80.10%、84.15%。结论: NMF 明 显促进胎鼠皮层神经元的洁性、提高正常皮层神经元,的存活卒,并能有效地保护KA所致的神经元损伤,提示 NMF 是一种很有潜力的治疗 AD 的药物。     

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial confi guration. The fi nal shape of the ferrite is closely related to the misfi t between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.     

Rheology Feature of Simple Metal Melt

The rheology feature of Sb, Bi melt and alloys was studied using coaxial cylinder high-temperature viscometer. The results showed that the curve of torsion-rotational speed for Sb melt presents a linear relation in all measured temperature ranges, whereas for the Bi melt, the curve presents obvious non-Newtonian feature within the low temperature range and at relative high shear stress. The rheology feature of Sb80Bi20 and Sb20Bi80 alloy melts was well correlated with that of Sb and Bi, respectively. It is considered that the rheology behavior of Sb melt plays a crucial role in Sb80Bi20 alloy and that of Bi melt plays a crucial role in Sb20Bi80 alloy.     

Effect of Short-Time Aging on the Pitting Corrosion Behavior of a Novel Lean Duplex Stainless Steel 2002

The effect of short-time aging in the temperature range between 400 and 1000 °C on the pitting corrosion behavior and mechanical property of a novel lean duplex stainless steel(LDSS) 2002 was investigated through the potentiostatic critical pitting temperature(CPT) tests and the Charpy impact tests. Both the pitting corrosion resistance and the toughness of aged specimens degraded due to the precipitation of detrimental secondary phases and the most significant reduction of CPT and impact energy emerged at 650 °C concurrently. The CPT of LDSS 2002 specimen aged at 650 °C decreased by 28 °C, and the impact energy dropped from 69 to 29 J/cm~2 compared with the solution-annealed sample. Transmission electron microscopy characterization showed that the main precipitates in LDSS 2002 were Cr_2N and M_(23)C_6 along the ferrite–austenite grain boundaries.     

INTRODUCTION TO PATENTS

The invention provides a method of making a mold which can reduce SOx generation rate while preventing decrease in hardening rate in the case of using sulfuric acid for a hardener composition. The method has a mixture step in which fire-resistant particles, a hardener composition and a binder composition are mixed to obtain a composition for a mold. The hardener composition contains sulfuric acid. In the mixture step, sodium carbonate is added. A molar ratio of the sulfuric acid to the sodium carbonate is 0.5 or more and 4.0 or less.     

China Foundry Week 2014

China Foundry Week, hosted by the Foundry Institution of Chinese Mechanical Engineering Society （FICMES） each year, is a large academic event in China. It is one of the ten high-impact activities sponsored by the Chinese Mechanical Engineering Society.     

17th Conference of Hydrodynamic and Electromechanical Control Engineering Call for papers

正1.Contents In order to promote the academic exchanges and technical communication of the research in the field of fluid power transmission and control,fluid control engineering specialized committee of the Chinese Society of Theoretical and Applied Mechanics will hold the 17th Conference of Hydrodynamic and Electromechanical Control Engineering on July 27-29,2014 in Tibet,Lhasa city.     

Information for Contributors

正The Transactions of Nonferrous Metals Society of China,founded in 1991 and sponsored by The Nonferrous Metals Society of China,is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology,including mineral processing,extraction metallurgy,metallic materials and heat treatments,metal working,physical metallurgy,powder metallurgy,with the emphasis     

Preface

<正>We are pleased to present this Special Issue of Transactions of Nonferrous Metals Society of China containing selected papers from the First Asian Conference on Aluminum Alloys(ACAA-2013),held in Beijing,China,13–17 October 2013.This conference has been initiated,with approval of     

Information for Contributors

The Transactions of Nonferrous Metals Society of China, founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, 1NSPEC, CA, METADEX, AJ and JICST.