赣州钕铁硼磁性材料的产业现状与发展趋势

论述了我国钕铁硼磁性材料的发展历程,总结了赣州近年来钕铁硼磁体产业的生产和发展情况,同时指出赣州是中国南方离子型稀土矿供应基地,但不是钕铁硼生产的基地;近年来,赣州已形成一条从稀土开采-合金冶炼-钕铁硼磁体生产完整的产业链,钕铁硼磁体相关企业正在逐年增加,企业自身的竞争力也在逐年增强。     

钕铁硼磁性材料生产工艺及其废料综合利用的研究进展

考察了目前钕铁硼磁性材料的生产工艺进展情况,对其生产过程中所产生的稀土固体废物的资源特性进行了分析讨论,论述了钕铁硼废料综合利用的现状并提出了建议。     

烧结钕铁硼磁性材料碳足迹核算分析

基于生命周期评价理论对l kg烧结钕铁硼磁性材料进行碳足迹研究.确定产品碳足迹核算的系统边界,根据产品生命周期清单,建立碳足迹计算模型,核算分析产品各生产阶段的碳足迹,提出减排方案并量化减排效果及减排效益.研究结果表明,生产1 kg烧结钕铁硼磁性材料的碳足迹为52.4087 kgCO2eq,其中铁矿石采矿阶段是主要贡献...     

新型稀土永磁材料─钕铁硼

新型稀土永磁材料─钕铁硼磁性材料与国计民生密切相关。而永磁材料作为一种功能材料，在电源、交通、机械、化工、医疗、电力、电子、信息及日常生活等领域有着广泛的应用。稀土永磁是永磁材料中的佼佼者，特别是新型稀土永磁材料钕铁硼更是由于其性能优异、价格低廉，在...     

废旧稀土金属钕铁硼回收技术研究现状与展望

稀土是重要的战略资源,也是世界强国资源争夺的核心。磁性材料尤其钕铁硼永磁体在生产制备和使役过程中产生大量废料,我国废旧钕铁硼产量逐年增多,形成了稀土“城市矿山”。研究废旧钕铁硼的回收利用技术,对我国稀土绿色和可持续发展具有重要意义。本文总结了国内外废旧稀土金属钕铁硼各种回收方法,综述了近年来稀土磁性废料回收技术研究进展,并面向保护环境和节约资源及低成本的发展趋势,对废旧稀土金属回收技术进行了展望。     

萃取法提取氧化镝项目竣工验收

镝在电子工业和磁性材料中,有着特殊的用途。氧化镝用于阴极涂层,可提高阴极发射能力;新型光源的镝灯,具有亮度高、光色好;掺入钕铁硼磁性材料中,可提高其居里点温度。上海跃龙有色金属有限公司研究所采用P507萃取剂,制取纯度>96%氧化镝,应用最优化方程萃取理论,直接在工业性生产中进行试验,经过三个月试生产证明;技术先     

田口方法在钕铁硼品质分析中的应用

介绍了田口方法在钕铁硼生产品质分析中的应用方法,并应用田口方法对钕铁硼产品厚度偏差问题提出了新的解决思路和解决方案.     

钕铁硼二次废渣制备铁系产品路径探析

钕铁硼二次废渣是钕铁硼烧结废料回收稀土后产生的工业废渣，年产量超过数万吨，是稀土磁性材料工业固体废弃物的最大单一排放源。钕铁硼二次废渣主要成分为Fe₂O₃，长期大量堆存不但占用土地资源，还引发污染环境问题。因此，对二次废渣的综合开发和高效利用可降低对环境的危害，减轻生产企业的环保压力，同时，还能提升经济效益。针对钕铁硼二次废料的物相及化学成分特点，阐述了利用钕铁硼二次废渣提铁，以及制备铁系产物的基本原理，并对制备路径进行了分析，以期为钕铁硼二次废渣的综合利用提供新思路。     

国际钕铁硼生产企业专利战略探析

由于专利限制,使得我国钕铁硼生产企业大部分不能跨出国门.在探讨麦格昆磁公司和Neomax公司专利战略的基础上,对两公司专利战略形成的背景因素进行客观分析,指出跨国公司新的竞争方式、磁性材料技术更新时间和专利期限的吻合程度、下游市场的快速拉动是钕铁硼国际巨头执行专利战略的前提所在.     

钕铁硼永磁材料在微电机中应用研究

介绍钕铁硼永磁材料的性能特点及制造方法，，应用钕铁硼永磁微电机的种类和特点及存在的问题和改进措施，简要介绍了钕铁硼永磁材料的生产概况和发展趋势以及在微电机中的应用前景。     

粘胶废水处理系统改扩建工程设计介绍

本文介绍粘胶废水处理系统改扩建工程的设计 改扩建设计将原工艺中生化处理部分的传统活性污泥法改为SBR法 ,只需新建一座均合池和四座SBR反应池中的二座 ,就使得污水处理能力由 2 5 0 0 0m3/d增加到 45 0 0 0m3/d .而且出水水质仍能达到辽宁省污水排放标准     

Genetic dissection of "OLETF", a rat model for non-insulin-dependent diabetes mellitus

Granulation tissue formation was studied in viscose cellulose sponges with different cellulose contents and sizes after subcutaneous implantation in rats. Samples were removed and studied histologically and histomorphometrically 1-16 weeks after implantation. The implants with lower cellulose content and smaller size were invaded by more cells and filled with connective tissue more rapidly than those with the higher content and larger size. In larger sponge implants the beneficial effect of the lower cellulose content was more conspicuous.     

Short- and long-term outcome of patients treated with cyclosporin for severe acute ulcerative colitis

The effect of core material properties on the process of compression and physical properties of compression-coated tablets were investigated using microcrystalline cellulose as the coating material (mantle). Three model core materials: borosilicate glass, silicone rubber, and steel, each of different Young's modulus, were selected to give a range of core mechanical properties. Coated tablets were prepared using a single-punch press, with facilities for monitoring the compression cycle and analysis of data using the Heckel (1) equation. This analysis showed a considerable effect of different core materials on the compression process, (i) as an unanchored core, and (ii) due to core material type with differing Young's modulus.     

3D打印锂离子电池正极的制备及性能

采用挤出式3D打印技术制备锂离子电池电极,选取三元镍钴锰酸锂（LiNi_0.5Co_0.2Mn_0.3O₂）作为正极活性材料,以去离子水、羟乙基纤维素和其他添加剂为溶剂来制备性能稳定且适合3D打印技术的锂离子电池正极墨水,利用流变仪、X射线衍射仪、电池测试仪、ANSYS模拟等探究了增稠剂种类和含量、墨水黏度、打印工艺等对墨水流变性质和可打印性能的影响。结果表明:选取羟乙基纤维素/羟丙基纤维素质量比为1∶1混合且质量分数为3%时,所制备的墨水黏度为20.26 Pa·s,此时墨水具有较好的流变性,打印过程出墨均匀,打印电极光滑平整,满足后期墨水的可打印性要求,经模拟分析,墨水黏度对墨水流动性影响明显;电极材料经超声分散、打印、烧结等过程后未造成原有晶体结构的改变;电极首次充放电容量分别为226.5和119.4 mA·h·g?1,经过20次循环后,电池充放电容量的变化率减小并趋于稳定,3D打印电极表现出良好的循环稳定性。      

Biocompatibility of cellulose sponge with bone

The purpose of this study was to investigate the biocompatibility of viscose cellulose sponge (VCS) with bone. Twenty-five Sprague-Dawley rats were used for the study. After curettage of the bone marrow from both femoral cavities, VCS (15 x 1 x 1 mm) was implanted into one femur, leaving the contralateral side empty as a control. The rats were killed 1-6 weeks after curettage, and bone formation inside the sponge was assessed by light-microscopic examination and histomorphometric assessment. Whereas normal bone formation in rat femoral cavity took place in 2 weeks after curettage, 4 weeks were needed for bone formation in the cellulose sponge. VCS is a compatible matrix for osseous tissue ingrowth and it may be useful as a scaffold for bone tissue engineering in experiments and possibly also in clinical practice.     

Some characteristic features of the production of extruded nickel fibers

Conclusions The catalytic action of nickel on the process of carbon removal during the heat treatment of viscose filaments filled with nickel powder enables virtually nonporous metal fibers to be obtained. In the sintering of nickel-containing viscose fibers the fiber preoxidation operation can be dispensed with, which simplifies the process of production of such fibers.Translated from Poroshkovaya Metallurgiya, No. 2(206), pp. 1–4, February, 1980.     

Degradation of cellulose by micromonospores

Sodium benzoate is suggested as an inhibitor of cellulose decomposing bacteria and fungi for detecting and counting micromonospores. Cellulose decomposing micromonospores were found in the zone adjacent to the roots of winter wheat and maize; their number, cellulose decomposing activity, morphological, physiological, and antagonistic properties were determined. Pasteurization of the material taken from colonies grown on cellulose is recommended for isolation of pure cultures.     

中厚板轧制前温度场的数值模拟

为减少中厚板产品缺陷，降低生产能耗，采用Ansys软件进行了轧制前温度场的数值模拟。考虑材料物理特性随温度变化的情况，并采用瞬态过程的处理方法，使数值模拟模型更适合于实际情况并减少计算量，提高了模拟精确度。结果表明：利用该模型对16Mn钢轧制过程进行数值模拟，其结果与实测数据进行对比，相对误差仅为3．89％。     

Effects of Process Parameters prior to Annealing on the Formability of Two Cold Rolled Dual Phase Steels

This study concerns the effects of coiling temperature after hot rolling and the degree of reduction during cold rolling on formability‐related properties of high strength cold rolled dual phase (DP) steels. The effect of coiling temperature on the final structure and properties of two cold rolled and annealed DP‐steels is investigated. Further, the effect of cold rolling reduction and its impact on the final properties of the material is studied. Aspects of the impact of the different process parameters on the ferrite to austenite and austenite to martensite transformation are discussed based on results from production scale experiments, tensile testing and metallographic examinations of the materials.     

球团原料混合均匀度的快速检测方法

针对球团工艺中原料混合均匀度的快速检测问题,以变异系数CV（%）来评估各组分的均匀程度,试验测定了精矿粉与膨润土不同配比情况下球团原料的混合效果,分析了质量指标变异系数、湿度指标变异系数、元素质量分数指标变异系数3种快速检测方法的可行性,并对现场取样的球团原料进行混匀度检测,验证了前述快速检测方法的有效性,提出评判球团原料混合均匀度的标准。所得结果可为今后研究球团原料混匀度的在线检测技术提供指导。