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various concentrations of FeCl3. During carbonization, following in situ reactions also known as dissolution– precipitation reactions occur [34]: Fe+Amorphous C→Fe3C ... in Fig. 8(c), the tan δ was higher, being in the range of 1.1-1.0 for GCFe5, which is better for EM wave attenuation and could be concluded from the Debye dipolar relaxation [41]. Presence of Fe......
. Effect of Co content on electrodeposition mechanism and mechanical properties of electrodeposited Ni-Co alloy [J]. Transactions of Nonferrous Metals Society of China, 2016, 26: 484-491. [25] SEKAR R... with distilled water and dried in a tube furnace under a controlled nitrogen atmosphere at 110-120 °C for 16 h. The preferred orientation of Ag particles was estimated by determining the texture coefficient......
Si-cen, SUN Zhi-fang, LIU Yao, LU Zhou-guang. Highly durable organic electrode for sodium- ion batteries via a stabilized α-C radical intermediate [J]. Nature Communication, 2016, 7: 13318. DOI... be mainly divided into five types: 1) carbon based materials; 2) metal oxides and sulfides; 3) alloy-based materials; 4) titanium- based composites; 5) organic compounds [6]. Graphite, the most......
and the temperature gradient is the driving force of pore-fluid flow. The metallogenic temperature of chalcopyrite in the Kaerqueka polymetallic deposit is between 250 and 350 °C. The corresponding... and Zn and accompanied with Fe, Au, Ag and so on [61]. The exposed rocks were mainly granitic intrusive rocks, followed by a small amount of Ordovician-Silurian Tanjianshan group of marble and basic......
: mill inlet water flow rate (m3/h); y3: classifier overflow concentration (%); c1: current through mill (A); c2: current through classifier (A); -T: instrument; F-, D-, C-, W-: flow rate, density... of final output weights. The Huber loss function is adopted and presented as follows. (27) where c is a positive adjustable......
decreases above 200 °C. The absorbed energy under the first impact and the total absorbed energy all decrease as the temperature increases, the rates of which decrease accordingly. And the same... bar of 1500 mm, an absorbing bar of 500 mm in length, a data-processing device and a signal recording device. The suitable d50 mm bar is made of high-strength alloy, with an ultimate strength of 800 MPa......
相,使钴保留在萃余液中.控制P204萃余液的成分ρ(Cu)≤0.002 g/L,ρ(Fe)≤0.005 g/L,ρ(Mn)≤ 0.01 g/L,ρ(Zn)≤0.005 g/L；P507萃取工序目的是实现钴与镍的分离,使钴萃取进入P507负载有机相,而镍留在萃余液中,要求萃余液中ρ(Co)≤0.1 g/L,P507负载有机相用硫酸溶液或盐酸溶液反萃,反萃液经过除油后浓缩结晶,分别得到硫酸钴或氯化钴产品. 1.2 P204反萃液产出 从上述钴矿湿法冶金工艺可以看出,P204萃取深度除杂过程是至关重要的.P204(二乙基己基磷酸)是一种广谱的阳离子萃取剂,在酸性介质中萃取金属离子由大到小依次为Fe3+,Zn2+,Cu2+,Mn2+,Co2+,Ni2+,Mg2+,Ca2+,所以,在P204萃取除杂过程中,Fe,Zn,Cu,Mn和部分Co会被P204萃取,后续采用盐酸溶液对P204负载有......
and 4PC can extract Cu(II), Ni(II), and Co(II) from acidic multi-metal sulfate solutions with about pH 2, and the extraction efficiency of copper is higher than that of other metal ions [5]. Moreover...]. 2-ethylhexyl 4-pyridinecarboxylate ester, 4PC, was synthesized following the procedure described elsewhere [24]. Escaid 110 (200-248 °C fraction hydrocarbon fluid with 99.5% aliphatic content) and n......
,包括生成CoOOH的黑镍除钴法[7],生成CoS沉淀的硫化物沉淀法[8],生成Co(NH3)63+沉淀的氨水沉淀法[9].化学沉淀法对于Ni,Co分离有一定效果,但Ni,Co选择性低,操作复杂而漫长,生产效率低下,使其较难在工业上取得应用.目前湿法冶金工业上广泛应用的是溶剂萃取法,其中膦酸类萃取剂P204常用于Ni,Co与Mn,Fe的分离[10-11],P507和Cyanex 272常用于硫酸,氯化体系中Ni,Co的分离[12-16],如李凡等[10]采用P204-磺化煤油体系,研究硫化镍精矿浸出液中杂质Ca,Fe的脱除,结果表明,在试验确定的最佳条件下,Ca,Fe萃取率均达97%以上,较好地实现了浸出液中Ni与杂质的分离.邬建辉等[14]采用钠皂化的P507-磺化煤油体系,研究硫酸镍溶液中Co,Zn,Cu的萃取脱除,经三级逆流萃取,钴的萃取率可达94.17 %,负载有机相用1mol/L......
temperature of filling body on heat release performance The heat release performance is analyzed when the initial temperature of filling body is 35 °C, 40 °C and 45 °C respectively under the conditions that inlet velocity is 0.72 m/s and inlet temperature is 18 °C for heat transfer fluid, and the diameter of the pipe is 32 mm. Figure 5 shows the change of internal temperature for filling body......
