润磨活化机理初探

通过SEM、X衍射分析、激光粒度分析以及比表面积和润湿热的测定 ,对润磨预处理铁精矿的活化机理进行了研究。研究表明 ,润磨后精矿平均粒径明显减小 ,细粒含量增加 ,- 4 5 μm粒级增加近 11% ,而 1～ 10 μm粒级由 13%提高到 2 0 %。粒径的对数值接近正态分布。精矿的润湿热由 1.4 5× 10 - 5J cm2 提高到 4 .77× 10 - 5J cm2 。衍射峰趋于变宽 ,衍射强度趋于减弱 ,晶格变形增加     

高压辊磨预处理铁精粉对生球性能的影响

介绍了在试验室用 2 0 0× 75mm高压辊磨机对磁铁精矿进行预处理的试验。对高压辊磨的工艺参数 (辊压、膨润土配比、辊速、辊磨次数、混合料水分 )进行了优化 ,考查了高压辊磨工艺对生球强度、生球破裂温度的影响。研究得出的优化参数是 :辊压为 1 75t、辊速为 10 0r/min、辊磨次数为 2次、混合料水分为 5 %。铁精矿通过高压辊磨预处理后 ,其生球强度明显提高 ,膨润土用量得到降低。     

高压辊磨机边料循环工艺在球团生产中的应用

采用边料循环工艺并结合三钢带式焙烧机生产实践,对高压辊磨机预处理铁精矿进行研究。结果表明,增加高压辊磨边料循环比例,铁精矿的比表面积得到了明显提高,成球性能显著改善。在造球水分为8%的条件下,边料循环50%的铁精矿比表面积、所制备生球以及焙烧球团矿各指标与同配比未经高压辊磨处理的铁精矿相比均有明显提高,铁精矿比表面积增加到1 650 cm2/g,生球落下强度达10 次/(0.5 m),返球率降至15%,成品球团矿抗压强度达到2 678 N,膨润土配比减少1.1 %,满足企业生产要求的同时,实现节能降耗的目的。     

高压辊磨强化赤铁精矿制备氧化球团的研究

以巴西某赤铁精矿为主要原料,在系统研究赤铁矿制备氧化球团特性的基础上,针对其生球强度差、焙烧温度高以及成品球强度差等问题,系统研究了高压辊磨预处理对其成球性能和焙烧性能的影响及规律,并从颗粒形貌的角度分析了影响机理.预处理后铁精矿的比表面积可达1 600 cm2/g以上,膨润土用量可降低0.75％,适宜的预热温度可降低...     

高压辊磨预处理对超细粒度磁铁精矿粉球团性能的影响

 某磁铁精矿粉粒度虽然非常细,小于0.044mm的比例达到88%,但由于该矿粉颗粒形貌为板状、片状结构,故为中等成球性能矿粉。采用高压辊磨对该矿粉进行预处理后,其颗粒形貌发生很大变化,造球性能得到改善,膨润土单耗降低,但生球爆裂温度有下降趋势;高压辊磨预处理铁矿粉后,对改善预热球团矿的抗压强度效果不明显,但成品球团抗压强度得到提高。研究结果表明,高压辊磨预处理对细粒度磁铁精矿粉的造球性能及成品球强度有明显的改善效果。     

钒钛铁精矿高压辊磨试验研究

对自产的钒钛铁精矿进行了高压辊磨、成球试验研究,探究出了钒钛铁精矿的高压辊磨工艺参数。     

铈、钇、镧、钕、钐在铁液中与碳的相平衡研究

在钼丝炉中研究了在1300,1400,1500,1600℃的铁液中稀土元素对碳的溶解度,稀土元素与碳的相互作用系数和生成REC_2的平衡常数。所得结果如下:1.Ce,Y,La,Nd和Sm增加碳在铁液中的溶解度;2.用金相、电子显微镜扫描分析说明铁液中形成了REC_2;3.铁液中[RE]+2[C]=REC_2反应的平衡常数和REC_2的标准生成自由能(J/mole)与温度的关系被测定了: CeC_2:logK=1.50×10~4/T-6.545,ΔG~0=-2.0279×10~5+125.27T YC_2:logK=8.902×10~3/T-6.488,ΔG~0=-1.7038×10~5+124.18T LaC_2:logK=2.2633×10~4/T-13.427,ΔG~0=-4.3319×10~5+256.99T NdC_2:logK=6.75×10~3/T-4.440,ΔG~0=-1.2919×10~5+84.98T SmC_2:logK=1.4709×10~4/T-9.422,ΔG~0=-2.8153×10~5+180.34T4.五个[RE]→[C]平衡相图提供了预测铁液中生成REC_2的热力学条件和稀土元素与碳的活度的依据。     

上海金缘工业工程公司转让生产有色金属板带材的二手设备

1 .步进式燃油加热炉　　　　炉子有效尺寸 1 461 6× 92 8ｍｍ　　　　2 .三辊热轧机330× 75 0ｍｍ ,有辊道 ,升降台主电机 2 5 0ｋＷ3.二辊冷轧机380× 75 0ｍｍ主电机 1 85ｋＷ4.板材清刷机四排 ,宽 1 0 0 0ｍｍ5 .板材中、精轧机40 0× 75 0ｍｍ6.板材中、精轧机30 0× 5 0 0ｍｍ7.剪板机 8× 2 5 0 0ｍｍ ,6× 2 5 0 0ｍｍ8. 1 9辊矫直机宽 1 45 0ｍｍ9.二辊开坯机30 5× 40 0ｍｍ 2 4 0ｋＷ1 0 .四辊轧机1 0 0 /40 0× 5 0 0　　　 75ｋＷ1 1 .四辊轧机1 0 0 /30 5× 40 0　　　 75ｋＷ1 2 .四辊轧机85 /2 30…     

秘细粉高压辊磨预处理研究与实践

对比分析了秘细粉与自产粉的成球性能,开展了提高秘细粉成球性能的试验研究。结果表明,通过高压辊磨,可增加秘细粉颗粒表面缺陷,改善其成球性,且采用闭路循环高压辊磨工艺效果较佳。实施秘细粉高压辊磨后,提高了其在球团原料中的配用比例,使球团矿品位明显提升。     

SiO2对金属锂盐聚合物电解质导电作用的影响

采用溶液浇注法制备了PEO基聚合物电解质,测定了该类电解质的电导率,并研究了温度、SiO2的颗粒度及表面性能对聚环氧乙烯/高氯酸锂(PEO/LiClO4)聚合物电解质体系电导率的影响.结果表明PEO-LiClO4-10%SiO2复合型聚合物电解质的室温电导率达到了1.033×10-4S/cm,同时对该电解质进行了差热分析,发现加入SiO2后,PEO/LiClO4体系熔融温度降低,非晶相含量增加,有利于提高离子电导率.     

Acceleration of Electricity Reform Brings Benefit to Big Electricity Users,Aluminum Manufacturers Can Save Costs Up to Several Hundred Million

<正>Recently the National Commission of Development and Reform again assembled experts to solicit opinions,and discussed new electricity reform program.According to information disclosed by experts attending the meeting,in the future electricity reform will undergo top-down design,possibly a     

Qinghai's Aluminum Processing Capacity to Rise at the End of the Year

正Since the release of Implementation Opinions on Carrying out‘Guiding Opinions of the State Council on Resolving Serious Production Overcapacity Conflicts’,according to the actual situation of industry,Qinghai has focused on electrolytic aluminum,cement,ironsteel(including iron alloy and silicon carbide),     

Recent Trends in China's Copper Scrap Market-Part Ⅱ

<正>2.Tianjin Scrap Metal Market In Tianjin,we mainly visited Jinghai Ziy Town scrap market and Binhai New Area’some copper scrap enterprises and enterprise using copper scrap.In Ziya we felt the coppe scrap market was particularly deserted,mos copper scrap enterprises in the town wer closed,industry insiders said in 2012 the plac here was bustling with activity.According to     

Shanghai Clearing House to Roll out Renminbi-denominated Copper Clearing Operations in Free Trade Zone

正Clearing House Financial Markets Co.,Ltd.(Shanghai Clearing House)General Manager Xie Zhong told the media recently at the briefing of the international symposium of"Reform Deepening and Mechanism Innovation of the Post-crisis Kerb Market",Shanghai Clearing House will explore the feasibility of carrying out bond business in     

Development and Application of New Materials for Copper Processing in China

正After over 60 years of developmnt,a system for RD and production of copper processing materials has already taken shape in China.After the reform and opening-up,the application of copper processing materials has gradually expanded from the military industry to civil field.The annual output of copper     

China’s Mineral Exploration Market Downturn Causes Decline of Investment in Bauxite

<正>According to a survey report conducted recently by China Geological Survey Development Research Center,in the first half of 2014,China’s mineral exploration market continued to decline,with the investment in exploration of non-fuel minerals dropping by13.7%and drilling workload dropping by21.7%.According to statistical analysis of the Center,     

Chinalco and China National Administration of Coal Geology Jointly Built Guangxi Rare Earth Industrial Base

正On June 3,Chinalco and China National Administration of Coal Geology signed cooperation agreement for strategic cooperationcooperation agreement between Chinalco Guangxi Nonferrous Rare Earth Development Company and Xuzhou Jin Shi Pengyuan Rare Earth Material Factory.According to the agreement,both sides would jointly support Chinalco Guangxi Nonferrous Rare Earth Development Company and Xuzhou Jin Shi Pengyuan Rare Earth Material Factory to carry out comprehensive cooperation covering rare     

Aluminium Production by Province or City in 2014

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Fabricated Copper Production by Province or City in 2014

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Zinc Production by Province in 2014

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