铝合金铁相团球化熔剂的研制

研制了一种铝合金铁相团球化熔剂，在含铁量较高（１．０％－４．０％Ｆｅ）的铝合金中加入该熔剂后，可使针片状的铁相变为团球状或颗粒状组织。从而大幅度提高原合金的机械性能，δｂ和δ分别提高２０％－９０％和４０％－１００％。生产实验表明：该熔剂团球化效果好（具有长效性），极便于在生产中推广应用。     

Synthesis and Crystal Structure of RE[CH_2(CH_2)_4CONC_4H_9]_3(NO_3)_3(RE=Dy,La)

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆＲＥ［ＣＨ２（ＣＨ２）４ＣＯＮＣ４Ｈ９］３（ＮＯ３）３（ＲＥ＝Ｄｙ，Ｌａ）ＷａｎｇＨａｎｚｈａｎｇ（王汉章），ＸｕＱｉｎｇｆｅｎｇ（徐庆锋），ＱｉａｎＰｕ（钱朴）ＳｕｎＪｉａｎｐｉｎｇ（孙建...     

添加高效粘结剂的氧化锰矿粉冷固成团

以氧化锰矿粉为原料，添加ＺＢ粘结剂进行冷固成团，所得冷固团块不仅具有足够的机械强度，而且具有良好的耐湿性，适用于长距离运输和露天堆存，是一种可与块矿性能相媲美的优质炉料，为充分利用矿山及冶炼厂的锰矿粉找到了一条良好的途径．     

Dynamics of hydrated iron(II) cations in nafion polymer membranes

Mössbauer studies of Fe²⁺ in water-soaked nafion polymer membranes in the temperature range between 90 K and 250 K have been performed. Above a critical temperature (～ 180 K) the spectra exhibit both elastic narrow absorption lines and quasielastic broad lines. These spectra are typical of bounded diffusion phenomena observed by Mössbauer spectroscopy in macromolecular systems like haemoglobin, myoglobin and ferritin. Similar spectral shapes have been observed by quasielastic neutron scattering from water in nafion membranes. Within 50 K above the critical temperature the total Mössbauer absorption area decreases by an order of magnitude whereas the narrow absorption line decreases by two orders of magnitude. The results are interpreted in terms of bounded diffusive motion of the iron. Using a model based on overdamped harmonically bound Brownian motion, the essential parameters of the iron motion can be derived as a function of temperature. The iron motion most probably reflects the motion of a large Fe²⁺ complex, e.g. Fe(H₂O)²⁺₆, which is attached to the polymer side chains via the sulphonic group.     

Cold Gelation of β-lactoglobulin in the Presence of Iron

ABSTRACT: To protect and transport iron, we investigated the trapping properties of a network formed from β-lactoglobulin. We studied the influence of different parameters—pH, iron, and protein concentrations—on gel properties (optical and mechanical properties, WHC, and microstructure). For all conditions tested, the results show the formation of a cold gel in the presence of iron. The mechanical properties reveal that the elastic behavior and the strength of rupture increase with higher protein concentrations and decrease with higher iron concentrations. The water-holding capacity is high for low iron concentrations. The microstructure shows that, at low iron/protein ratios, a homogeneous filamentous network is obtained whereas, at high iron/protein ratios, more random aggregated particles are present.     

Influence of load and speed on wear characteristics of grey cast iron in dry sliding — selection for minimum wear

The wear of grey cast iron in dry sliding conditions has been studied with the aims of (1) finding the influence of working conditions on the wear rate, and (2) determining the region of speed and load where low wear is accomplished. Grey cast iron with flake and nodular graphite was submitted to investigation using a pin-on-disc machine. The results indicate that the flake graphite cast iron is more suitable for applications at speeds greater than 4 m s⁻¹ and lower loads, while nodular cast iron has greater wear resistance at lower speeds in the range of loads investigated - from 50 N cm⁻² to 200 N cm⁻²     

Synthesis and Spectral Properties of Mixed-Ligand Complexes of Lanthanide Perchlorate with Bis-(phenylsulfinyl)ethane and Organic Lewis Bases

ＳｙｎｔｈｅｓｉｓａｎｄＳｐｅｃｔｒａｌＰｒｏｐｅｒｔｉｅｓｏｆＭｉｘｅｄＬｉｇａｎｄＣｏｍｐｌｅｘｅｓｏｆＬａｎｔｈａｎｉｄｅＰｅｒｃｈｌｏｒａｔｅｗｉｔｈＢｉｓ（ｐｈｅｎｙｌｓｕｌｆｉｎｙｌ）ｅｔｈａｎｅａｎｄＯｒｇａｎｉｃＬｅｗｉｓＢａｓｅ...     

云南锰矿选矿现状与前景分析

云南锰矿资源丰富,具有品位高、低磷低铁、易选等特点。文章概述了斗南、鹤庆、建水等锰矿的选矿科研进展情况,三个锰矿均可采用强磁选或磁-重选流程选别,可提高品位8—12％;精矿含锰可达33—35％,锰回收率在80％以上的好结果。     

全面留矿法采场顶板支护和落矿爆破工艺的研究

本文介绍的接杆锚杆护顶技术和上向眼大孔距多排微差爆破落矿技术，解决了逐昌金矿全面留矿法采矿工艺中存在的采场顶盘围在面积冒落和采场落矿爆破效果差、效率低这两个问题。     

应用硫酸铵提高乌拉嗄金矿石浮选回收率试验研究

经试验发现应用一种化学肥料硫酸铵可以显著提高乌拉嘎金矿石的浮选回收率。闭路试验尾矿工艺矿物学鉴定证明，以硫酸铵作为调整剂的浮选过程中，微细粒单体金和金与石英边生体被有效回收。