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铜锰渣回收有价金属中沉铜试剂选择和工艺条件的研究
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作者 王永浩 赵彤 +1 位作者 岳心圆 李瑞娜 《中国资源综合利用》 2020年第6期99-101,共3页
铜锰渣富集了大量的铜、钴、锰等有价金属元素,人们要有效开展铜锰渣有价金属的深度回收利用,其关键是实现铜锰渣中铜离子与其他金属离子的有效分离。本文针对铜锰渣沉铜工序遇到的技术瓶颈,采用理论研究、试验比对、工艺条件测试等手段... 铜锰渣富集了大量的铜、钴、锰等有价金属元素,人们要有效开展铜锰渣有价金属的深度回收利用,其关键是实现铜锰渣中铜离子与其他金属离子的有效分离。本文针对铜锰渣沉铜工序遇到的技术瓶颈,采用理论研究、试验比对、工艺条件测试等手段,确定了铜锰渣沉铜工序选择性试剂和最优条件。经实践测试,其可以达到铜锰渣沉铜技术要求,为铜锰渣回收有价金属的工业化应用研究提供支持。 展开更多
关键词 铜锰渣 沉铜 工艺条件
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湿法炼锌过程铜回收率提升工艺研究 被引量:1
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作者 保雪凡 张程 +5 位作者 邓志敢 周正华 林文军 刘自虎 邱伟佳 魏昶 《中南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2023年第12期4652-4661,共10页
针对常规炼锌工艺中存在铜回收率低、杂质累积等问题,本文提出了弱酸浸铜沉铁-低酸强化浸铜两段逆流酸浸、弱酸浸出液回收铜-中和除杂的湿法浸出工艺。首先,对锌焙砂进行弱酸浸出,避免中性浸出存在的铜沉淀问题,同时将部分铁沉淀入渣;然... 针对常规炼锌工艺中存在铜回收率低、杂质累积等问题,本文提出了弱酸浸铜沉铁-低酸强化浸铜两段逆流酸浸、弱酸浸出液回收铜-中和除杂的湿法浸出工艺。首先,对锌焙砂进行弱酸浸出,避免中性浸出存在的铜沉淀问题,同时将部分铁沉淀入渣;然后,通过低酸浸出破坏原料中的氧化物、铁酸盐和硅酸盐等多种含铜化合物的矿物结构,最大限度地实现铜的高效浸出;第三,通过铁粉置换的方法从弱酸浸出液中回收铜,再进行中和除杂;最后,考察体系酸度、反应温度和时间等参数对浸出过程锌、铁、铜元素浸出及沉淀的影响。研究结果表明:浸出过程中元素行为以及焙砂中复杂锌、铜物相的破坏溶出主要受体系酸度影响。反应温度以及反应时间对于复杂物相的溶出影响较小。在温度为80℃、反应时间为2.5 h、搅拌转速为400 r/min的条件下,弱酸浸出铁的沉淀率为72.17%,铜的浸出率为67.24%;低酸浸出锌和铜浸出率分别为91.86%和71.83%。在温度为70℃、反应时间为20 min、搅拌转速为400 r/min的条件下,弱酸液沉铜铁粉添加系数为3,铜沉淀率为93.2%。由于锌、铜在原料中的赋存状态复杂,难溶和易溶物相种类多样,增大了锌、铜金属高效综合回收的难度。氧化物、硅酸盐等多种矿物结构均被较彻底地破坏,而硫化物、铁酸盐溶出效果欠佳,铜的回收率提高至70%。 展开更多
关键词 铜回收率 湿法炼锌 水解沉铁 铁粉沉铜
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铜助剂对费-托合成沉淀铁催化剂的影响 被引量:2
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作者 张煜华 熊海峰 李金林 《武汉大学学报(理学版)》 CAS CSCD 北大核心 2004年第6期678-682,共5页
用X 射线衍射、氢气程序升温还原、氢气程序升温脱附和氧滴定等技术对沉淀法制备的铜 铁费 托合成催化剂进行了表征.结果表明,铜促进了Fe2O3→Fe3O4的还原,且使该过程的起始还原温度明显降低,但对Fe3O4→FeO→Fe两个还原过程无影响;通... 用X 射线衍射、氢气程序升温还原、氢气程序升温脱附和氧滴定等技术对沉淀法制备的铜 铁费 托合成催化剂进行了表征.结果表明,铜促进了Fe2O3→Fe3O4的还原,且使该过程的起始还原温度明显降低,但对Fe3O4→FeO→Fe两个还原过程无影响;通过浸渍法加入的铜虽可较好地分散在催化剂表面,但却导致了氢气的吸附量减少,同时由于Cu和Fe之间可能存在的相互作用,使催化剂中的还原态物质在氧滴定中不能被充分氧化;Cu还有助于Fe在催化剂表面的分散. 展开更多
关键词 费-托合成 铁催化剂 铜助剂 X射线衍射 氢气程序升温还原 氢气程序升温脱附 氧滴定
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并流沉淀法降低铜电解液中砷锑铋杂质离子的研究 被引量:3
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作者 王军辉 姚夏妍 +5 位作者 焦晓斌 牛永胜 汪友元 鲁兴武 余江鸿 席利丽 《中国有色冶金》 CAS 北大核心 2021年第3期1-8,共8页
铜电解液中的As、Sb、Bi离子含量是影响阴极铜质量的重要因素,现有的电解沉积法电耗高、铜损失量大,萃取方法和离子交换法存在液量大的缺陷。本文利用SO_(2)还原As^(5+)和Sb^(5+)、H_(2)O_(2)氧化As3+和Sb3+调整化合价,促使砷锑铋形成... 铜电解液中的As、Sb、Bi离子含量是影响阴极铜质量的重要因素,现有的电解沉积法电耗高、铜损失量大,萃取方法和离子交换法存在液量大的缺陷。本文利用SO_(2)还原As^(5+)和Sb^(5+)、H_(2)O_(2)氧化As3+和Sb3+调整化合价,促使砷锑铋形成沉淀阳极泥的原理,进行了二氧化硫和双氧水并流沉淀方法降低铜电解液中砷锑铋杂质离子的实验研究,结果表明:一定条件下,单独向铜电解液中通入SO_(2)可以降低Sb离子浓度,但As、Bi离子浓度的变化幅度不大;单独向铜电解液中通入H_(2)O_(2)可以降低As、Sb离子浓度,但也会降低Cu、Bi离子浓度,严重时导致阳极钝化;在最佳条件下,H_(2)O_(2)采用滴加方式、加入量为4 m L/L、SO_(2)进气浓度为0.125 g/L、搅拌速度为250 r/min、反应温度为50℃,并流沉淀技术可以实现降低铜电解液中砷锑铋杂质离子的目的,且不会出现阳极钝化现象。 展开更多
关键词 铜电解液 砷锑铋离子 并流沉淀法 阴极铜质量 沉淀阳极泥 漂浮阳极泥 阳极钝化 铜损失
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Highly enhanced thermoelectric and mechanical performance of copper sulfides via natural mineral in-situ phase separation
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作者 Xi Yan Hongjiang Pan +6 位作者 Yixin Zhang Tianyu Yang Yangwei Wang Kun Huang Chongyu Wang Jing Feng Zhenhua Ge 《Journal of Advanced Ceramics》 SCIE EI CAS CSCD 2024年第5期641-651,共11页
In situ phase separation precipitates play an important role in enhancing the thermoelectric properties of copper sulfides by suppressing phonon transmission.In this study,Cu1.8S composites were fabricated by melting ... In situ phase separation precipitates play an important role in enhancing the thermoelectric properties of copper sulfides by suppressing phonon transmission.In this study,Cu1.8S composites were fabricated by melting reactions and spark plasma sintering.The complex structures,namely,micron-PbS,Sb_(2)S_(3),nano-FeS,and multiscale pores,originate from the introduction of FePb_(4)Sb_(6)S_(14)into the Cu1.8S matrix.Using effective element(Fe)doping and multiscale precipitates,the Cu_(1.8)S+0.5 wt%FePb_(4)Sb_(6)S_(14)bulk composite reached a high dimensionless figure of merit(ZT)value of 1.1 at 773 K.Furthermore,the modulus obtained for this sample was approximately 40.27 GPa,which was higher than that of the pristine sample.This study provides a novel strategy for realizing heterovalent doping while forming various precipitates via in situ phase separation by natural minerals,which has been proven to be effective in improving the thermoelectric and mechanical performance of copper sulfides and is worth promoting in other thermoelectric systems. 展开更多
关键词 in situ precipitates JAMESONITE natural mineral THERMOELECTRIC copper sulfides
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Mechanical and magnetic properties of copper dispersed ferrum films under heat treatment 被引量:1
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作者 Guma Yeli Zheng-Cao Li +1 位作者 Xiao-Yi Yu Zheng-Jun Zhang 《Rare Metals》 SCIE EI CAS CSCD 2014年第6期641-645,共5页
The Cu-containing steels are widely used for nuclear pressure vessel materials because of their good performance under high pressure and high temperature. In this article, magnetron sputtering was used to prepare iron... The Cu-containing steels are widely used for nuclear pressure vessel materials because of their good performance under high pressure and high temperature. In this article, magnetron sputtering was used to prepare iron films with various Cu contents. The samples were annealed at temperature range of 300–500 °C, and the structural,mechanical, and magnetic properties were studied. The results show that both hardness and modulus change along with copper content and annealing temperature. The change in coercivity after annealing is similar to that of hardness. The crystal grain growth in matrix ferrum and Cu precipitation during annealing influences both the mechanical and magnetic properties. 展开更多
关键词 Ferrum copper precipitates Magnetron sputtering Thermal properties
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Effects of aging on the microstructure of a Cu-Al-Ni-Mn shape memory alloy 被引量:1
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作者 U.Sari T.Kirindi +1 位作者 F.Ozcan M.Dikici 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2011年第4期430-436,共7页
The influence of aging on the microstructure and mechanical properties of Cu-11.6wt%Al-3.9wt%Ni-2.5wt%Mn shape memory alloy(SMA) was studied by means of scanning electron microscopy(SEM),transmission electron micr... The influence of aging on the microstructure and mechanical properties of Cu-11.6wt%Al-3.9wt%Ni-2.5wt%Mn shape memory alloy(SMA) was studied by means of scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffractometer,and differential scanning calorimeter(DSC).Experimental results show that bainite,γ2,and α phase precipitates occur with the aging effect in the alloy.After aging at 300°C,the bainitic precipitates appear at the early stages of aging,while the precipitates of γ2 phase are observed for a longer aging time.When the aging temperature increases,the bainite gradually evolves into γ2 phase and equilibrium α phase(bcc) precipitates from the remaining parent phase.Thus,the bainite,γ2,and α phases appear,while the martensite phase disappears progressively in the alloy.The bainitic precipitates decrease the reverse transformation temperature while the γ2 phase precipitates increase these temperatures with a decrease of solute content in the retained parent phase.On the other hand,these precipitations cause an increasing in hardness of the alloy. 展开更多
关键词 copper alloys shape memory effect martensitic transformations AGING precipitATES
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粗铜冶炼电收尘烟灰的湿法处理 被引量:14
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作者 付运康 《四川有色金属》 2000年第3期47-50,共4页
粗钢冶炼电收尘烟灰按原设计经过配料、混捏,返回炼钢炉熔炼,不仅不经济,也给炼钢生产带来危害。本文寻求水浸处理该烟灰的湿法封闭流程,既可合理回收烟灰中有价金属,做到无废水排放,又能在低投资下获得明显经济效益。
关键词 粗铜冶炼 电收尘烟灰 水浸 海绵铜 湿法处理
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沉淀剂加入速度对Cu-Mn复合氧化物结构和变换反应活性的影响 被引量:3
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作者 何润霞 刘全生 +1 位作者 智科端 崔协力 《燃料化学学报》 EI CAS CSCD 北大核心 2008年第6期767-771,共5页
The copper-manganese mixed oxides prepared by coprecipitation were tested for water gas shift reaction on a micro-reaction system with on-line GC analysis and characterized by XRD,TEM,BET and TPR.The adding rate of pr... The copper-manganese mixed oxides prepared by coprecipitation were tested for water gas shift reaction on a micro-reaction system with on-line GC analysis and characterized by XRD,TEM,BET and TPR.The adding rate of precipitator has significant effect on the texture and activity.The copper-manganese mixed oxide with adding time of precipitator less than 33min presents higher activity,especially the higher thermo stability.The copper-manganese mixed oxide prepared at adding time of precipitator less than 160min are mainly consisted of Cu1.5Mn1.5O4.With the increasing of adding time of precipitator,especially for longer than 160min Mn2O3 appears.After catalytic reaction MnO,Cu and Cu2O are the crystalline structure of the samples.With the increase of Mn2O3 the activity,especially the thermo stability activities decrease.Therefore,it can be concluded that the adding rate of precipitator is most curial factor for the preparation of high performance copper-manganese mixed oxides for the water gas shift reaction. 展开更多
关键词 沉淀剂加入速率 铜锰复合氧化物 变换反应 活性 耐热性
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铜冶炼电收尘酸浸液硫化砷渣沉铜行为研究 被引量:1
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作者 马云聪 许俊 +1 位作者 佘宗华 罗豪 《矿冶工程》 CAS 北大核心 2023年第6期116-118,127,共4页
针对高硫酸浓度且铁、砷以高价态Fe^(3+)、As^(5+)形式存在的酸浸液,采用硫化砷渣为沉铜剂沉铜。首先开展了不同酸浓度下单一Cu^(2+)、Fe^(3+)溶液中硫化砷渣加入量实验,在此基础上再进行了实际酸浸液沉铜、浸出砷实验。结果表明,采用... 针对高硫酸浓度且铁、砷以高价态Fe^(3+)、As^(5+)形式存在的酸浸液,采用硫化砷渣为沉铜剂沉铜。首先开展了不同酸浓度下单一Cu^(2+)、Fe^(3+)溶液中硫化砷渣加入量实验,在此基础上再进行了实际酸浸液沉铜、浸出砷实验。结果表明,采用硫化砷渣沉铜时,首先发生Fe^(3+)与S^(2-)的氧化还原反应,其次是As^(5+)与S^(2-)的氧化还原反应,最后是Cu^(2+)的硫化沉淀反应;硫化砷渣加入量为理论量的1.4倍时,沉铜率较高,但砷溶出率较低。 展开更多
关键词 铜冶炼 电收尘 硫化砷渣 沉铜 溶出 高酸度
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发射光谱法定量分析水系沉积物中的铜、铅、锌、银、钼 被引量:5
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作者 刘涛 李念占 《黄金》 CAS 2003年第8期45-48,共4页
发射光谱法结合CTS计算机自动译谱工作软件 ,可定量测定水系沉积物中的Cu、Pb、Zn、Ag、Mo等微量元素 ;与过去采用的光谱法比较 ,大大提高了光谱多元素分析的准确度和灵敏度。该方法的检出限为Cu :2 .0× 10 - 6 ,Pb :2 .0× 10... 发射光谱法结合CTS计算机自动译谱工作软件 ,可定量测定水系沉积物中的Cu、Pb、Zn、Ag、Mo等微量元素 ;与过去采用的光谱法比较 ,大大提高了光谱多元素分析的准确度和灵敏度。该方法的检出限为Cu :2 .0× 10 - 6 ,Pb :2 .0× 10 - 6 ,Zn :3.0× 10 - 6 ,Ag :0 .0 2× 10 - 6 ,Mo :0 .5× 10 - 6 ;精密度实验表明 ,各元素的RSD(n =12 )为 7.6 %~ 13.0 %。经国家标准物质检验 ,该方法测定结果与标准值基本相符 ,满足 1∶2 0万区域化探扫面工作的需要。 展开更多
关键词 发射光谱法 CTS计算机自动译谱 水系沉积物样品
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Pyrometallurgical Removal of Arsenic from Electrostatic Precipitators Dusts of Copper Smelting 被引量:1
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作者 Hector Henao Ignacio Paredes +1 位作者 Rodrigo Diaz Javier Ortiz 《Journal of Minerals and Materials Characterization and Engineering》 2021年第6期545-565,共21页
This work describes the experimental results of pyrometallurgical removing of arsenic from the dust collected in the electrostatic copper precipitators within the gas cleaning system of a Copper Flash Smelting Furnace... This work describes the experimental results of pyrometallurgical removing of arsenic from the dust collected in the electrostatic copper precipitators within the gas cleaning system of a Copper Flash Smelting Furnace. The generation of dust in the copper smelting worldwide ranges from 2 - 15 wt% per ton of a copper concentrate. In Chile, copper smelters produce approximately 110 kt/y of dust with a concentration of arsenic between 1 and 15 wt%. The dust is a complex of metals oxides and sulfurs with copper concentrations greater than 10 wt% and relatively high silver concentrations. Since its high arsenic concentration, it is difficult to recover valuable metals through hydrometallurgical processes or by direct recirculation of the dust in a smelting furnace. Thus, the development of pyrometallurgical processes aimed at reducing the concentration of arsenic in the dust (<0.5 wt%) is the main objective of this study, giving particular attention to the production of a suitable material to be recirculated in operations of copper smelting. The work provides a detailed characterization of the dust including the Quantitative Evaluation of Minerals by Scanning Electron Microscopy (QEMSCAN), Scanning Electron Microscope-Energy Dispersive X-ray Analysis (SEM/EDS), X-Ray Diffraction (XRD), the elemental chemical analysis using Atomic Adsorption (AAS), and X-Ray Fluorescence (X-RF). By considering that arsenic volatilization requires a process of sulfidation-decomposition-oxidation, this work seeks to explore the roasting of mixtures of copper concentrate/dust, sulfur/dust, and pyrrhotite/dust. By the elemental chemical analysis of the mixture after and before the roasting process, the degree of arsenic volatilization was determined. The results indicated the effects of parameters such as roasting temperature, gas flow, gas composition, and the ratio of mixtures (concentrate/dust, sulfur/dust, or pyrrhotite/dust) on the volatilization of arsenic. According to the findings, the concentration of arsenic in the roasted Flash 展开更多
关键词 copper Smelter Dust Electrostatic precipitators of copper Removal of Arsenic SULFIDATION Roasting Process
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Characterization and Pyrometallurgical Removal of Arsenic from Copper Concentrate Roasting Dust
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作者 Hector Henao Ignacio Paredes +1 位作者 Rodrigo Diaz Javier Ortiz 《Journal of Minerals and Materials Characterization and Engineering》 2021年第6期609-620,共12页
This paper describes the experimental results of removing arsenic from the dust collected in electrostatic precipitators of a fluidized bed roasting furnace (RP dust). The fluidized bed roasting process generates 600 ... This paper describes the experimental results of removing arsenic from the dust collected in electrostatic precipitators of a fluidized bed roasting furnace (RP dust). The fluidized bed roasting process generates 600 kilotons of copper concentrate per year with 3 - 6 wt% of concentration of arsenic, producing a roasted product with a low content of arsenic below 0.3 wt%. The process generates 27 kilotons of RP dust per year with a concentration of arsenic of the order of 5 wt% and copper concentration of around 20 wt%. Subsequently, the dust collected in the electrostatic precipitators is treated by hydrometallurgical methods allowing the recovery of copper, and the disposition of arsenic as scorodite. This work proposes to use a pyrometallurgy process to the volatilization of arsenic from RP dust. The obtained material can be recirculated in copper smelting furnaces allowing the recovery of valuable metals. The set of experiments carried out in the roasting of the mixture of copper concentrate/RP dust and sulfur/RP dust used different ratios of mixtures, temperatures and roasting times. By different techniques, the characterization of the RP dust determined its size distribution, morphology, and chemical and mineralogical composition. RP dust is a composite material of small particles (<5 μm) in 50 μm agglomerates, mostly amorphous, with a complex chemical composition of sulfoxides. The results of the roasting experiments indicated that for a 75/25 weight ratio of the mixture of the copper concentrate/PR dust under 700℃, 15 minutes of roasting time with injection of air, the volatilization of arsenic reached 96% by weight. The arsenic concentration after the roasting process is less than 0.3% by weight. For a 5/95 mixture of sulfur/RP dust, at 650℃, the volatilization of arsenic reached a promissory result of 67%. Even that this study was carried out for a particular operation, the results have the potential to be extended to dust produced in the roasting of concentrates of nickel, lead-zinc, and gold. 展开更多
关键词 copper Smelter Dust Electrostatic precipitators of copper Removal of Arsenic SULFIDATION Roasting Process Fluidized Bed Roasting
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铜冶炼转炉电收尘器改造实践 被引量:3
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作者 涂建华 胡俊 +1 位作者 李伟 周亮亮 《有色冶金设计与研究》 2018年第6期34-37,共4页
针对东南亚某铜冶炼厂转炉电收尘器设备老旧,需要进行原地改造的状况,对原电收尘器安装位置、基础等情况深入研究,确定了原地改造扩建1台卧式双室四电场电收尘器的方案。在"电收尘器参数及结构确定—三维设计—模块化预组装和基础... 针对东南亚某铜冶炼厂转炉电收尘器设备老旧,需要进行原地改造的状况,对原电收尘器安装位置、基础等情况深入研究,确定了原地改造扩建1台卧式双室四电场电收尘器的方案。在"电收尘器参数及结构确定—三维设计—模块化预组装和基础提前施工—模块吊装"的总体改造方案下,60 d内顺利完成了原电收尘器的拆除和新电收尘器的安装调试工作。生产运行数据表明,改造后,新转炉电收尘器满足扩产后的生产要求,且实际出口含尘浓度优于设计值。 展开更多
关键词 电收尘器 改造 铜冶炼 扩产 转炉烟气
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含砷金铜矿熔炼电尘灰酸性氧化浸出研究 被引量:2
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作者 张俊峰 《有色金属(冶炼部分)》 CAS 北大核心 2021年第2期35-39,共5页
含砷金铜精矿火法熔炼电尘灰是铜冶炼熔炼车间产出的中间产物,成分复杂,较难处理,属于典型危废。以山东某冶炼公司含砷金铜矿熔炼产出的中间产物电尘灰为原料,采用双氧水为氧化剂进行酸性氧化浸出,最佳浸出工艺条件为:双氧水用量120kg/... 含砷金铜精矿火法熔炼电尘灰是铜冶炼熔炼车间产出的中间产物,成分复杂,较难处理,属于典型危废。以山东某冶炼公司含砷金铜矿熔炼产出的中间产物电尘灰为原料,采用双氧水为氧化剂进行酸性氧化浸出,最佳浸出工艺条件为:双氧水用量120kg/t、酸性氧化浸出时间2h、浸出温度80℃、酸度60g/L,铜和砷的浸出率分别达到92.30%、87.50%以上。为铜冶炼企业湿法处理电尘灰提供了一条新途径。 展开更多
关键词 铜冶炼 电尘灰 氧化剂
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铜冶炼电尘灰回收砷工艺研究 被引量:3
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作者 初长青 张俊峰 王雷 《有色冶金节能》 2020年第4期39-43,共5页
本文详细介绍了山东某冶炼公司铜冶炼电尘灰回收砷工艺的原理、流程、反应条件、主要设备、关键控制点。铜冶炼电尘灰经过酸浸处理,滤渣可返回铅冶炼系统回收铅及金银,酸浸液经二氧化硫还原可回收砷,得到纯度85%以上的粗砷,还原后液可... 本文详细介绍了山东某冶炼公司铜冶炼电尘灰回收砷工艺的原理、流程、反应条件、主要设备、关键控制点。铜冶炼电尘灰经过酸浸处理,滤渣可返回铅冶炼系统回收铅及金银,酸浸液经二氧化硫还原可回收砷,得到纯度85%以上的粗砷,还原后液可回收铜和锌。该工艺系统经过近1年的时间运行,生产稳定,不仅解决了砷烟灰难处理的问题,而且获得了良好的经济效益。 展开更多
关键词 铜冶炼电尘灰 砷回收 酸浸 还原 粗砷 二氧化硫
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沉淀剂对铜锰复合氧化物组成结构及催化性能的影响
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作者 智科端 魏秀荣 +4 位作者 陈建华 张亚刚 何爽 何润霞 刘全生 《内蒙古工业大学学报(自然科学版)》 2010年第1期36-41,共6页
采用KOH和NaOH作沉淀剂,通过共沉淀法合成铜锰复合氧化物,运用XRD、TG-DSC、TPR、BET等对其进行了表征,并测定了其对变换反应的催化性能.研究结果表明,采用NaOH作沉淀剂时,沉淀物前驱体主要为Mn3O4和Cu2+1O,而选用KOH为沉淀剂时,则主... 采用KOH和NaOH作沉淀剂,通过共沉淀法合成铜锰复合氧化物,运用XRD、TG-DSC、TPR、BET等对其进行了表征,并测定了其对变换反应的催化性能.研究结果表明,采用NaOH作沉淀剂时,沉淀物前驱体主要为Mn3O4和Cu2+1O,而选用KOH为沉淀剂时,则主要为碱式硫酸铜Cu4+2SO4(OH)6.2H2O;焙烧后两种沉淀剂所合成样品均转化为Cu1.5Mn1.5O4;用于变换反应后NaOH作沉淀剂的样品主体为Cu和MnO,而用KOH作沉淀剂的样品主体却为Cu、MnO与Mn.虽然KOH为沉淀剂所得沉淀终产物(前驱体)样品比表面积较大,但经过焙烧和反应后,NaOH为沉淀剂所得样品比表面积都要比相应的KOH为沉淀剂样品高50%以上.NaOH作沉淀剂所合成样品的TPR为只有一个还原峰的单一还原反应过程,而KOH作沉淀剂的样品TPR反应过程复杂,在150~900℃为多步反应过程,出现了多个反应峰.对于变换反应,以KOH作沉淀剂所制备样品失活速度极快,而以NaOH作沉淀剂所制备样品的催化活性显著高于以KOH作沉淀剂所制备样品,且具有良好的热稳定性. 展开更多
关键词 沉淀剂 铜锰复合氧化物 KOH NAOH 变换反应
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一起静电除尘器高频电源的故障分析 被引量:2
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作者 蓝东亮 《集成电路应用》 2019年第4期103-104,共2页
叙述了一起某电厂静电除尘器高频电源异常分析及处理过程。通过报警信息调阅和解体检查方式,分析故障原因为低压绕组引线与铜箔焊接处对铁芯放电导致铜箔层间短路引起高频电源报警跳闸。从该高频变压器结构特点和故障点位置分析,该台高... 叙述了一起某电厂静电除尘器高频电源异常分析及处理过程。通过报警信息调阅和解体检查方式,分析故障原因为低压绕组引线与铜箔焊接处对铁芯放电导致铜箔层间短路引起高频电源报警跳闸。从该高频变压器结构特点和故障点位置分析,该台高频变压器生产工艺不良,导致引线对铁芯放电,进一步引起铜箔层间放电导致铜箔层间短路放电和铁芯片间短路,引起IGBT和油温过高等报警。 展开更多
关键词 静电除尘器 高频电源 低压绕组引线 铜箔层间放电
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Influence of copper on quality of hot strips by EAF-CSP process
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作者 WANG Yuanli, LIU Delu, SHAO Weiran, FU Jie, KANG Yonglin, ZHOU Deguang, and WANG Zhongbing 《Rare Metals》 SCIE EI CAS CSCD 2004年第1期63-63,共1页
Electron microscopy and X-ray Energy Dispersive Spectroscopy (XEDS) study on influence of Cu on low carbon hot strips produced by CSP (Compact Strip Production) process has been carried out. The results indicated tha... Electron microscopy and X-ray Energy Dispersive Spectroscopy (XEDS) study on influence of Cu on low carbon hot strips produced by CSP (Compact Strip Production) process has been carried out. The results indicated that copper segregation and enrichment at interfacial layer between oxidized surface and steel matrix is the key factor, which results in microcracks and edge flaws on the strips. The primary considerations to prevent detrimental effects from Cu include controlling copper content in proper level, higher soaking temperature and non-oxidizable atmosphere during soaking. Copper sulfide precipitates with nanometers in size were observed, they may be beneficial to the properties of CSP products, and influence of Cu on quality of CSP hot strips is discussed. 展开更多
关键词 Cu segregation surface flaws CSP hot strips copper sulfide nano-scaled precipitates
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