硫酸渣除铜研究

江苏某化工厂排出的烧渣含铁一般50％左右，经我们试验，可将铁品位提高到61％，含硫则由0．96％降至0．34％。烧渣中还有1％左右的铜，必须使铜降至0．2％左右才可用作炼铁原料。为此，进行了除铜研究。l烧法样及研究方法烧渣呈黑灰色，疏松易碎，易团聚成蜂窝状。镜下观察，细粒石英浸染于赤铁矿、磁铁矿中，硬石膏和铜矿物也呈细粒嵌布于赤铁矿和磁铁矿中。烧渣的多元素分析和物相分析见表1、表人以上分析看出硫酸渣样中的矿物无明显的结晶面，分选的难度较大。矿样中的铜主要是结合氧化铜，采用常规的硫化黄药浮选法一酸浸法、离析一浮…     

从黄铁矿烧渣中回收铁的新工艺

硫铁矿焙烧后矿物晶形被破坏，质地疏松，呈微细粒嵌布，属难选矿物。采用简单的弱磁选和重选方法不能获得理想的分选指标。苏州硫酸厂烧渣采用细磨─酸洗─弱磁选─反浮选联合流程，可以从含铁５２．１５％的烧渣中分离出含铁５９．７５％的铁精矿，总回收率８２．７２％。为充分利用烧渣提供了新的途径。     

不烧镁白云石炭砖

日本研制生产了一种不烧镁白云石炭砖，其配料组成为：CaO含量大于25％的白云石熟料，或者是ChO含量大于25％的镁钙砂20％～75％，炭质原料5％～40％，余者为镁砂，外加0．1％～1．0％的Mg－B系复合物，混合后制成不烧砖。该砖抗氧化性能优异。不烧镁白云石炭砖@徐慧娟     

电石渣100%代替石灰石煅烧水泥熟料易烧性的研究

对新疆A厂电石渣100％代替石灰石新型干法煅烧水泥熟料的易烧性进行研究表明,电石渣100％代替石灰石煅烧水泥熟料,生料易烧性好;在配料率值相同的条件下,不同硅质原料对生料易烧性的影响很小;水泥熟料28d强度符合52．5硅酸盐水泥国家标准。     

利用含铁废渣制取高纯柠檬酸亚铁的研究

柠檬酸亚铁是一种易吸收的高效铁制剂，介绍了以硫铁矿烧渣为原料，经过磁选、熟化、除杂等生产工艺制备柠檬酸亚铁。指出硫铁矿烧渣通过磁选，可提高烧渣中铁的富集，节约能耗；经过熟化处理实验，得到较佳条件：温度为170～200℃，熟化时间1～1．5h，使烧渣中铁的回收率增加。再经过除杂等工艺过程制得硫酸亚铁，并用NH4HCO3使之转化为FeCO3，最后与柠檬酸在80℃反应1h，可以制备出高纯、超细柠檬酸亚铁粉体。制备的产品纯度可达到99．7％以上，为有效、合理地利用该废弃资源提供了新的途径，达到了消除环境污染的目的。     

率值和矿化剂或晶种对水泥生料易烧性的影响

通过对１３８个常用水泥生料样的易烧性试验结果进行统计比较后得知,熟料烧成率值的变化对生料易烧性系数Ｋ１４００℃影响较大。其中ＫＨ平均每降低０．０１,Ｋ１４００℃提高０．３６％;ｎ平均每升高０．１０,Ｋ１４００℃、降低０．６１％;Ｐ平均每升高０．１０,Ｋ１４００℃降低０．５８％左右。掺加适量的复合矿化剂、晶种、萤石矿化剂后均使生料易烧性得到明显改善,其改善效果由好到差顺序依次为复合矿化剂≥晶种≥萤石矿化剂,外掺后分别使Ｋ１４００℃比未掺时平均提高３．６９％、２．７７％和２．２２％左右。     

钴离子对水泥熟料烧成作用的研究

为探讨掺入钴离子对硅酸盐水泥熟料易烧性和矿物结构的影响，进行了系列试验研究。试验以空白生料为基准，分别掺入0．5％，1％，2％的Co2O3，煅烧至1250，1300，1350，1400，1450℃，利用化学分析、XRD、SEM、高温显微分析等方法，探讨了Co2O3掺入对熟料烧成和矿相性能的影响情况。结果表明：（1）掺入Co2O3能改善硅酸盐水泥生料的易烧性，且掺量越大，易烧性越好；（2）掺入Co2O3可以降低熟料反应相中液相生成温度，降低液相的粘度，促进C2S矿物的形成。     

生料粒度分布特性与粉磨细度控制指标

从生料易烧性角度分析确定了以0．2mm筛余作为生料细度目标值,以80μm筛余作为生料粉磨细度日常控制指标。使用RRSB方程探讨了生料粒度分布与典型粒径筛余的关系,结果表明,当80μm筛余一定时,随着生料粒度分布均匀性系数提高,0．2mm筛余降低,易烧性提高。在保证0．2mm筛余为1．5％的前提下,如果生料均匀性系数由0．83增加到1．12,则80μm筛余可以由14％增加到22％,而不显著改变易烧性。     

采用黄磷渣与高炉矿渣作原材料对熟料强度的影响

为降低生料成本。提高生料易烧性，2006年5～8月份，我厂用黄磷渣作为硅、铝质原材料进行试生产。经过5、6两个月的立窑煅烧试验发现：黄磷渣作为硅质、钙质原料使用时，效果良好。当黄磷渣的掺量为5．5％时，效果最佳。从7月份起，我们便将生料中黄磷渣的掺量固定为5．5％。9月份开始，由于我厂附近生产黄磷的企业停产，黄磷渣短缺，我们不得不停用。     

煤球制气经验小结

我厂经过不断探索和总结，目前已实现在Ф3．2m小高径比的煤气炉上全烧和掺烧贵州煤球，全烧煤球单炉最高产气量达7000m^3，h，平均产气量在5700m^3／h左右，灰渣残碳≤30％，每小时耗煤球2．5～2．7t：折成吨氨耗煤球在1．60-1．80t，换算成吨氨标煤耗在1．29～1．36t。掺烧30％煤球时单炉产气量在8000m^3／h左右，灰渣残碳≤20％。粉煤卖出收入400元／t，贵州煤到厂价700元／t（含粉率30％），煤球加工费在80～100元／t，     

乙苯,苯乙烯的生产及合成乙苯,苯乙烯催化剂的研究进展

苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况，合成乙苯，苯乙烯所用的催化剂种类，并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。     

Synthesis and characterization of homopolymers and copolymers of various acrylates and acrylonitrile

Various homopolymers and copolymers of methyl acrylate, ethyl acrylate, butyl acrylate, and acrylonitrile in different feed ratios were synthesized. These were characterized by IR, ¹³C-NMR, DSC, DTA, and TGA. Spectroscopic characterization helped in differentiating copolymers of different mol ratios. Thermal analysis revealed different degradation patterns for homopolymers and copolymers. The temperature and energy changes associated with various phase transitions were dependent on the chemical composition of homo- and copolymers, as expected. © 1993 John Wiley & Sons, Inc.     

生物质气化及生物质与煤共气化技术的研发与应用

总结了生物质原料的特点及生物质单独气化的缺点;介绍了国内外生物质气化技术及生物质与煤共气化技术的研发与应用现状;分析了在此领域国内外的发展趋势与前景;概括了开展生物质与煤共气化技术研发的意义。     

责任和责任心的涵义与结构

责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体.     

二甲基二烯丙基氯化铵和丙烯酰胺的合成及应用

用复合引发体系(过硫酸盐-偶氮类引发剂)和脂肪胺类氧化还原体系引发,在实验室获得了单体转化率≥98%,特性粘数高于13.6 dL/g的阳离子共聚物PDA,探讨了控制聚合物分子量的影响因素.     

Comparison of the Adhesion and Cohesion of Triblock and Random Copolymers of Styrene and Butadiene

A substantially greater detachment energy is required to strip a polyethylene tereph-thalate (Mylar) film from a styrene-butadiene-styrene (SBS) triblock copolymer compared to that for peeling from a random styrene-butadiene (SBR) copolymer. This is true even though the intrinsic interaction between the Mylar and each elastomer is expected to be similar because of their virtually identical chemical composition. It is proposed that this difference in peel strength (between the SBS and SBR) is a consequence of the much higher dissipative capacity of the former elastomer. Another manifestation of this is the higher cohesive tear strength of the SBS compared to the SBR. Extents of energy dissipation within each elastomer during detachment of the Mylar adherend are consistent with the hypothesis that the average maximum stress experience before detachment is some similar fraction of each elastomer's tensile strength.     

钾盐资源及钾肥供需情况分析及预测

阐述了国内外钾盐资源及钾肥生产现状,对国内外钾盐的供需形势进行了分析及预测,从资源、原材料、国际市场三方面提出了解决我国钾盐短缺的措施。     

Electronic structures and reactivities of monometallic and bimetallic clusters of Au and Cu

The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu₃Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu₃Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters.     

Wetting properties of homopolymers and copolymers of pentafluorostyrene and methylacrylate and homopolymer blends

Polypentafluorostyrene (PPFS), polymethylacrylate (PMA), and poly(pentafluorostyrene-co-methylacrylate), poly(PFS-co-MA) were prepared and the wetting characteristics of polymer blends of PPFS and PMA were compared with that of poly(PFS-co-MA) via contact angle measurements. The critical surface tension of polypentafluorostyrene was found to be 22.6 dyne/cm, which is comparable to the value reported for polytrifluoroethylene (22 dyne/cm). The critical surface tension of poly(PFS-co-MA) is not linearly related to its composition. The polymer blends of PPFS and PMA exhibit significant surface enrichment of the fluoropolymer. The harmonic-mean method¹ was employed to determine surface tensions of these polymers and many known polymers. It is found that the method produces useful surface tension data provided the contact angle values are derived from testing liquids of dissimilar polarity.