共搜索到19676条信息,每页显示10条信息,共1968页。用时:0小时0分0秒781毫秒
is shown in Fig. 1. Before electrowinning, the leaching solutions were preserved in the respective leaching solution tanks to allow the impurities to be deposited at bottoms of the tanks. Next, the leaching solution is mixed with the spent acid solution in the mixing cell. The mixture, also called the electrolyte, is passed to the electrolysis cell, where the zinc ions are deposited onto the cathode......
samples were cut to sizes of 30 mm × 20 mm × 2 mm. 2.2 Pre-treatment First, the cut Mg alloy samples were degreased in an alkaline solution containing 45 g/L NaOH, 10 g/L Na3PO4·12H2O, and 0.1 g/L sodium..., and then placed into the cylinder. The stainless steel cylinder was placed in a water-cooled pipe to keep the temperature of the solution below 45 °C during the MAO treatment. The preparation......
the extraction and stripping characteristics of mixtures of Versatic 10 and Cyanex 301 were investigated. 2 Experimental 2.1 Aqueous and organic solutions The synthetic feed solution was prepared.... The equilibrium pH was measured using a Rex pH meter and the loaded organic solution was mixed with a selected scrub solution in order to remove the impurities in the loaded organic solution. After......
; (18) Based on NSGA II, Pareto solution set can be calculated as shown in Fig. 3. An approximate linear negative correlation is found between delay and saturation. That is, these two... solution will be selected from the Pareto solution set. According to the standard of Level of Service (LOS) for intersection in China [19], when the delay is greater than 80 s, the traffic flow is super......
, the produced samples were chemically treated in 1 mol/L HCl and 20 wt.% HF solution stirred for 12 h, respectively, followed by thoroughly washed with de-ionized water. Finally, after being vacuum dried at 80 °C... was prepared as follows: 5 mg prepared catalysts were dispersed in the solution of 2 mL ethanol and 40 μL Nafion solution (5wt.%) ultrasonically for homogenization for 15 min, then 20 μL dispersion......
, and colloidal species [28-30]. The role of each species in the depression mechanism was studied by some researchers [31,32]. These studies showed that the polymeric sodium silicate solution exhibits.... The potential of the working electrode was measured against the reference electrode coupled to a Luggin capillary filled with a saturated solution of KNO3 (0.1 mol/L) as the supporting electrolyte. All......
the effect of alternative process plans and simultaneous formation of part families and machine groups. JIANG and HSIAO [8] used 0-1 integer programming approach in their solution to minimize absolute... identify optimal or near optimal solutions from solution populations. GAs operate as an iterative procedure on a fixed size of population of candidate solutions called chromosomes. In each iteration......
load and shaft rotation speed. Some solid lubricating coatings have been adopted to solve wear problem of hydraulic pump. The bonded solid lubricant coatings show more advantages in wear resistance [9], such as simple construction and low cost. There are many kinds of solid lubricant coatings in industrial applications, such as molybdenum disulfide (MoS2) [10], graphite [11], polytetrafluor......
. Irradiation effect on leaching behavior and form of heavy metals in fly ash of municipal solid waste incinerator[J]. Journal of Hazardous Materials, 2012, 199/200(15): 440-447. [2] Kavouras P, Kaimakamis G, Ioannidis T A, et al. Vitrification of lead-rich solid ashes from incineration of hazardous industrial wastes[J]. Waste Management, 2003, 23(4): 361-371. [3] Macakova S, Hepworth M T, Pliesovska......
of mould working condition. Post-cleaning and disposal of these lubricants and greases are difficult and costly, and have a significant influence on the production efficiency[1-2]. Solid lubricant coatings and powders are typically employed in extreme environment for providing high temperature lubrication. Conventional solid lubricants, graphite and transition metal disulfides such as MoS2, WS2......