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(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... pretreatment on the performance of as-prepared LiMn2O4 is studied. 2 Experimental 2.1 Preparation of materials In acid treating, EMD was immersed in 1 mol/L H2SO4 solution for 24 h and washed with purified......
) 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... to study the influence of thermal, thermo-NaOH and acid pretreatment on reducing sugar and soluble chemical oxygen demand (SCOD) production, in which 30 g (TS)/L of the MPBRs was loaded......
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......
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...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......
or the time is increased. The sodium hydroxide pretreatment before pitting can remove the oxide film of the foils, and the hydrochloric acid pretreatment makes Cl- ion enter into the surface of foils... 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......
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......
acid[J]. Hydrometallurgy, 2010, 102(1/4): 14-21. [29] 叶国华, 童 雄, 路 璐. 含钒钢渣的选矿预处理及其对后续浸出的影响[J]. 中国有色金属学报, 2010, 20(11): 2233-2238. YE Guo-hua, TONG Xiong, LU Lu. Pretreatment for V-bearing steelmaking... rate of vanadium increases from 80% to 85%. Key words: vanadium-bearing steel slag; pretreatment; leaching; hydrochloric acid Foundation item: Project(E2017318007) supported by the Natural Science......
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...蓬松状,稍加研磨便可粉碎,因此需在高温碱熔活化前对尾矿进行酸浸除杂处理. 表1 尾矿组分的XRF分析 Table 1 XRF analysis of tailings components 表2 尾矿及酸浸尾矿组分的ICP分析 Table 2 ICP analysis of tailings and acid leaching tailings......