共搜索到856条信息，每页显示10条信息，共86页。用时：0小时0分0秒687毫秒
Trans. Nonferrous Met. Soc. China 22(2012) 1146-1150 Effect of electrolytic MnO2 pretreatment on performance of as-prepared LiMn2O4 ZHAO Yu-qian1, JIANG Qing-lai2, WANG Wei-gang3, DU Ke3, HU... (EMD) on the performance of LiMn2O4, several pretreatment methods, such as acid treating, presintering and impregnating with chromic salt, were used. The pretreated EMD and prepared LiMn2O4 were......
) after extraction of algin could be applied in anaerobic fermentation. The effects of different pretreatment conditions, substrate concentrations and initial pH values on hydrogen and volatile fatty acid (VFA) production during the anaerobic fermentation of MPBRs were evaluated. The optimal pretreatment conditions, substrate concentration, initial pH values were determined as thermo-alkaline......
X射线荧光光谱法测定海绵铁中TFe,SiO2,P,CaO,MgO李韶梅1,杜彩霞1,张慧娟1(1.河北省邯郸市河北钢铁集团邯钢技术中心)摘 要:研究了熔融法制样,X射线荧光光谱法分析海绵铁的最佳熔融和测量条件,建立了X荧光光谱法分析海绵铁中TFe,SiO2,P,CaO,MgO的方法.本方法通过熔剂熔融挂壁制成熔剂坩埚和对试样的氧化预处理,使样品熔解更完全并保护了铂金坩埚.实验选择了硝酸钾和碳酸锂作为氧化剂,制样时加入Co元素作主成分TFe的内标,校正基体效应和烧失量(烧增量),采用铑靶LNN线的康普顿散射线作次......
-Verlag Berlin Heidelberg 2011 Abstract: The pretreatment of refractory polyvinyl-alcohol (PVA) wastewater with low value of CODCr by Fenton’s reagent was investigated to enhance the biodegradability... 8.9%-9.7% to 62.6%-68.3%. Key words: Fenton’s reagent; polyvinyl-alcohol; pretreatment; biodegradability 1 Introduction Polyvinyl-alcohol (PVA), a well-known recalcitrant pollutant, is widely used......
预处理可显著提高锌的浸出率,当微波预处理温度和时间分别为950 ℃和12 min时,锌的浸出率达到96.58%.微波预处理打开了堵塞的废触媒孔道,增大了浸出剂与锌的接触面积. 关键词:微波预处理；废触媒；浸出率 中图分类号:TF 803.21 文献标识码:A Effects of microwave pretreatment on zinc... Engineering, Kunming University of Science and Technology,Kunming 650093, China) Abstract: A new technology for microwave pretreatment of spent catalyst-leaching of zinc in hydrochloric acid solution......
of final-annealing and pretreatment before etching on pitting ability of aluminum foils LIU Jian-cai1, 2, ZHANG Xin-ming1, 2, CHEN Ming-an1, 2, ZHU Bin1, 2, TANG Jian-guo1, 2, LIU Sheng-dan1, 2 (1..., Central South University, Changsha 410083, China) Abstract: The influence of the final-annealing parameters and pretreatment before etching on the etching ability of the high voltage aluminum foils......
pretreatment on structureand properties of high strength 7055 aluminum alloy CHEN Kang-hua, HUANG Lan-ping, HU Hua-wen, LIU Hong-wei (State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China) Abstract: The effect of ultrasonic melt pretreatment on the solidification structure and mechanical properties of 7055 aluminum alloy was investigated. Based on the cavitation......
produced from Rampura-Agucha tailings[J]. Hydrometallurgy, 2007, 89(3/4): 332-336. [11] OLUBAMBI P A. Influence of microwave pretreatment on the bioleaching behaviour of low-grade complex sulphide ores[J... on the processing and dissolution behaviour of low-grade complex sulphide ores[J]. Hydrometallurgy, 2007, 89(1): 127-135. [14] NANTHAKUMAR B, PICKLES C A, KELEBEK S. Microwave pretreatment of a double......
slag and pretreated tailings 表4 预处理后尾渣能谱分析 Table 4 EDS analysis results of tailing after pretreatment 图14和表4给出了提钒尾渣的背散射电子衍射图及对应的能谱分析结果,可以看出,色度偏白的物相(A)主要为含铁,铝,钛和钒,且钒的含量达到17.97%,主要为预处理后裸露出来的RO相,稍微发暗的物相(B)为含硅,钙,铁相,即主要为硅酸钙和钛铁矿.发黑的物相(C)为含硅,钙,钛相,即主要硅酸钙相. 图14 预处理后尾渣SEM像 Fig. 14 SEM image of tailing after pretreatment 4 碳酸钠浸出 将预处理后的尾渣进行碳酸钠浸出处理,根据已有的研究结果[29],碳酸钠浸出的最佳反应条件如下......
hydrothermal method (MH), using non-ferrous metal tungsten ore and lead-zinc ore tailings as materials which were activated pretreatment by high-temperature alkali fusing after acid leaching and low.... Low-temperature alkali dissolution activate pretreatment can obtain higher n(SiO2)/n(Al2O3) liquid precursors, which leads to the transformation of the morphology of the product from a spherical shape......
