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拜耳法高铁赤泥直接还原制备海绵铁的研究 张元波1,蔡凌波1,黄柱成1,杨永斌1,姜涛1 (1.中南大学) 摘要:高铁赤泥煤基直接还原-磁选分离制备海绵铁,实现了铁的有效富集;还原过程中2FeO·SiO2和FeO·Al2O3的生成阻碍了赤泥中铁氧化物还原,采用预焙烧处理可以促进赤泥还原,但添加剂存在时经预焙烧处理效果不显著;还原过程中添加剂Na2CO3产生碱性氧化物与酸性氧化物反应,CaF2则可降低固相反应产生化合物熔点和粘度,改善还原条件;添加3%Na2CO3和3%CaF2,还原焙烧温度为1 150 ℃,还原焙烧时间为3 h时,还原焙烧块的金属化率达到92.79%,可获得铁品位89.57......
用低场强自重介质跳汰机制取海绵铁原料的研究 王化军1,张强1,秦煜民1 (1.北京科技大学) 摘要:采用新型的低场强自重介质跳汰机,按再磨-自重介质跳汰-脱硫浮选和再磨-脱硫浮选-自重介质跳汰2种选矿工艺流程,对程潮铁精矿进行了制取海绵铁原料的小型试验.结果表明,低场强自重介质跳汰机有明显的提质降杂作用,在给矿铁品位为65.52%,含硫0.425%的情况下,第1种流程可获得铁品位69.91%,回收率88.58%的合格海绵铁原料,硫降至0.010%. 关键词:海绵铁; 自重介质; 跳汰; 脱硫; [全文内容正在添加中] ......
用程潮铁精矿制取海绵铁原料的工艺研究 祁超英1,刘曙2 (1.武钢矿业公司;2.武钢程潮铁矿) 摘要:先后采用了再磨-磁选-浮选,再磨-浮选,筛分-浮选,再磨-浮选-磁选4种选矿工艺流程,对用程潮铁精矿制取海绵铁原料进行了试验研究.结果表明,再磨-浮选-磁选流程结构简单,设备运转稳定,易操作,且能得到合格产品,可推荐作为半工业试验选矿工艺流程. 关键词:海绵铁原料; 铁精矿; 选矿工艺; [全文内容正在添加中] ......
of Information Technology2. Institute of Catalytic Material Science, Sichuan University摘 要:Barium oxide was developed successfully to modify palladium catalysts... activity results showed that BaO had a positive effect on the conversion of all pollutants. H2-TPR results suggested that the addition of BaO increased the reductive ability of the palladium catalysts......
by dipping it into chromic acid-sulfuric acid containing a trace amount of palladium. The surface roughness, activity, and valence bond were characterized by atomic force microscopy (AFM) and X-ray... amount of O=C?O functional groups by dipping into Pd contained etching solution, thus the amount of colloids palladium adsorption increases. The carboxyl group acts as the ad- sorption site for the Pd......
of Information Technology2. Institute of Catalytic Material Science, Sichuan University摘 要:Barium oxide was developed successfully to modify palladium catalysts... activity results showed that BaO had a positive effect on the conversion of all pollutants. H2-TPR results suggested that the addition of BaO increased the reductive ability of the palladium catalysts......
; Abstract: The effects of polyurethane sponge pretreatment and slurry compositions on the slurry loading in precursor were discussed, and the performances of stainless steel foams prepared from precursors with different slurry loadings and different particle sizes of the stainless steel powder were also investigated. The experimental results show that the pretreatment of sponge with alkaline solution......
., Ltd., Baoji 721014, China) Abstract: The sponge titanium and master alloys were used as the raw materials. The reasonable technique to prepare the high uniformity TC11 standard sample for spectral...-mixed with the sponge titanium as raw materials after three times vacuum arc furnace (VAR) smelting. Key words: TC11 alloy; standard sample; chemical composition; uniformity 国产TC11钛合金的名义成分为......
海绵铁中提取镓的研究 李玉虎1,艾侃1,张登凯1,刘志宏1,李启厚1 (1.中南大学冶金科学与工程学院,湖南长沙,410083) 摘要:采用高酸浸出--铁粉还原浸出--富集--除铁--还原萃取工艺从海绵铁中回收镓.酸浸条件为起始酸度180g/L H2SO4,最终pH0.2,温度80℃.中浸采用铁粉调节pH4.2,经过3次循环,镓浸出率92.6%.以10%P204+90%磺化煤油+1.5%YW-100为萃取剂,水相与有机相相比为5∶1,pH1.5,镓的萃取率为99%.用6mol/L分析纯盐酸作反萃剂,反萃级数为3级,经氨水沉淀得到产物镓的纯度为97%. 关键词:海绵铁; 镓; 富集; 萃......
Equilibrium between titanium ions and high-purity titanium electrorefining in a NaCl-KCl meltJian-xun Song,Qiu-yu Wang,Guo-jing Hu,Xiao-bo Zhu,Shu-qiang Jiao,Hong-min ZhuState Key Lab of Advanced Metallurgy,University of Science and Technology Beijing摘 要:TiClx(x = 2.17) was prepared by using titanium sponge to reduce the concentration of TiCl4 in a NaCl......
