铜矿山残矿资源化回收利用的研究

本文综述了铜矿山残矿的形成,提出了残矿资源化回收利用的主要技术方案,同时指出了我国铜矿山残矿资源化回收利用的重要性、紧迫性和可行性。     

微电解法处理染料废水试验研究

本研究从影响微电解法处理染料废水的几个主要影响因素如染料的初始浓度、pH值、催化剂等方面较全面的考察了该工艺的性能,并对微电解法处理染料废水的电化学反应机理进行了讨论。得出的最佳工艺条件为:pH2～3,加入活性MnO22mL(0.5mg/mL)时处理效率最高。对浓度低的染液处理效率较高。     

电子束重熔Ni60A自熔合金涂层的研究

用电子束重熔、等离子喷涂和等离子堆焊方法制备Ni60A自熔合金涂层。通过SEM、电子能谱和显微硬度分析表明,电子束重熔涂层与基体的结合较好、气孔率较低、细小的脆性相在涂层中起弥散强化作用,其显微硬度最高。磨损实验也证明了电子束重熔涂层的耐磨性最好。     

镍铬铝合金中铁锰的原子吸收法测定

镍铬铝合金中 ,镍、铬、铝含量约分别为 75 %、15 %、5 %。本文选用盐酸、高氯酸分解试样 ,其中的铁、锰以原子吸收法测定。通过对样品的测定表明本方法可靠 ,测定结果令人满意 ,回收率在 97%～ 10 1% ;RSD分别为 0 6 2 %、1 10 % (n =9)。本方法已应用于镍铬铝合金样品中铁、锰的测定     

高镍铜精矿喷吹熔炼工艺技术研究

含镍铜精矿的铜镍分离是冶炼过程的关键技术,特别是对高镍铜精矿如何经济有效地进行铜镍分离是当前铜镍冶炼迫切需要解决的问题。本文根据铜镍硫化物和氧化物的氧化还原热力学进行火法选择性还原达到铜、镍分离目的。对磨浮高镍铜精矿和浸出高镍铜渣进行了冶炼新工艺研究,提出喷吹熔炼概念。采用喷嘴技术,使物料在空间进行氧化反应,在熔池中进行选择性还原,炼出的金属铜达到粗铜标准。     

应用新一代萃取剂Cyanex272进行钴镍分离的研究

Ｃｙａｎｅｘ２７２是新一代在硫酸盐溶液中分离钴、镍的萃取剂。本文研究了各种因素对Ｃｙａｎｅｘ２７２分离钴、镍的影响,探寻了Ｃｙａｎｅｘ２７２在镍电解净液钴渣处理工艺和高冰镍精炼新工艺中的应用前景。     

Comprehensive Transcriptome Analysis of Hair Follicle Morphogenesis Reveals That lncRNA-H19 Promotes Dermal Papilla Cell Proliferation through the Chi-miR-214-3p/β-Catenin Axis in Cashmere Goats

Cashmere is initiated and develops in the fetal stages and the number and density of secondary hair follicles (SHFs) determine cashmere production and quality. Growing evidence indicates that both microRNA (miRNA) and long non-coding RNA (lncRNA) play an indispensable role in hair follicle (HF) growth and development. However, little is known about miRNAs, lncRNAs, and their functions as well as their interactions during cashmere initiation and development. Here, based on lncRNA and miRNA high-throughput sequencing and bioinformatics analysis, we identified 10,485 lncRNAs, 40,639 mRNAs, and 605 miRNAs in cashmere goat skin during HF induction, organogenesis, and cytodifferentiation stages. Among them, 521 lncRNAs, 5976 genes, and 204 miRNAs were differentially expressed (DE). KEGG analysis of DE genes indicated that ECM–receptor interaction and biosynthesis of amino acids were crucial for HF development. Notch, TGF-beta, and Wnt signaling pathways were also identified, which are conventional pathways associated with HF growth and development. Then, the ceRNA regulatory network was constructed, and the impact of lncRNA H19 was investigated in dermal papilla (DP) cells. The MTT, CCK-8, and EdU assays showed that the viability and proliferation of DP cells were promoted by H19, and mechanistic studies suggested that H19 performed its function through the chi-miR-214-3p/β-catenin axis. The present study created a resource for lncRNA, miRNA, and mRNA studies in cashmere morphogenesis. It could contribute to a better understanding of the molecular mechanism of ncRNAs involved in the regulation of HF growth and development.     

氯丁橡胶胶管内层胶热油老化前后的扣压应力-应变模拟

以氯丁橡胶为胶管基胶,采用非线性有限元分析软件ABAQUS对胶管扣压内层胶进行有限元分析,并建立胶管扣压模拟,模拟热油老化前后内层胶在扣压后不同路径下Mises应力、应变能密度(SED)、应力集中单元SED及扣压过程中静刚度的变化。结果表明,同一路径下,老化前Mises应力及SED均大于老化后;当扣压位移量相同时,老化前的静刚度大于老化后,同一单元老化前的SED大于老化后。     

3500 mm中厚板轧机MAS功能的在线实现

简化平面形状的控制理论模型,建立了楔形区厚度变化量和长度的线性关系;对轧件轧制长度进行计算机离散化处理,采用牛顿迭代法,建立纵向变截面轧制的微跟踪模型;根据实际轧制力和目标厚度,由Absolute—AGC进行辊缝设定计算,利用自主开发的2级计算机控制系统在邯钢3500mm中厚板轧机上实现了平面形状控制功能,获得了较好的控制效果。     

济钢高层建筑用Z向钢板的生产现状

本文介绍济钢高层建筑用Z向钢板的生产工艺和实物质量现状,针对济钢Z向钢板生产中存在的在线改判率高等系列问题,提出了Z向钢板开发与生产的应对措施。