分别采用电镀法和化学镀法在炭纤维表面镀镍，通过控制镀镍时间来控制炭纤维表面镀镍颗粒的大小、形态和数量。利用扫描电子显微镜对电镀镍和化学镀镍的炭纤维表面进行微观形貌分析，观察发现两种镀镍方式镍的生长方式是不同的，其中电镀镍中，镍以颗粒状形式生长，而化学镀镍以层片状生长；利用能谱仪对试样进行成分分析，结果表明，电镀炭纤维表面获得镍单质颗粒，而化学镀获得镍磷的合金NiP2颗粒。

HTA carbon fibers were electroplated Ni and electroless plated Ni on the surface,respectively.The size,morphology and quantity of Ni particle can be controlled by controlling time of plating Ni.The micro-structure of Ni coated carbon fibers were analyzed by SEM.It indicated that the growth pattern of the two types plated Ni was different,which electroplated Ni grew with particles and electroless plating Ni grew with lamellar structure.The elements of samples were studied by EDS.The results showed that the electroplating can obtain Ni elementary substance,but the eletroless plating can obtain NiP2 alloy particles on CF surface.

某铜镍矿对铜镍分离进行选矿试验研究,论证了铜镍混合精矿进行分离的可行性,以及铜镍分离产生铜、镍单一精矿后的新增效益要高于铜镍混合精矿的经济效益。

A copper nickel ore dressing experiment was studied for the separation of copper nickel, demonstrates the feasibility of copper and nickel mixed concentrate separation, single separation produces copper, nickel and copper nickel concentrate after the new benefit is higher than that of copper and nickel mixed concentrate economic benefits.

采用D2EHPA溶剂对含锌镍酸性溶液进行萃取分离锌、镍试验研究,在最佳萃取、反萃分离条件下,锌的萃取、反萃率分别为99.34%、99.79%,镍的萃取、反萃率分别为99.16%、99.58%,锌镍分离系数达25 000以上,得到的含锌、含镍反萃液分别符合电解锌、电解镍的技术要求。

The paper studied that the sulphuric acid solution contained zinc and nickel were separated by solvent extraction using D2EHPA as extraction agent.The results showed that ,in the best conditions,the extraction and back-extraction ratio of zinc reached 99.34% and 99.79%, respectively. The extraction and back-extraction ratio of nickel reached 99.16% and 99.58%, respectively.The separation factor of zinc and nickel was more than 25 000.The content of Zn and Ni in the back-extraction solution respectively conform the electrolysis requirements.

采用不同前驱体，硝酸镍、醋酸镍、氯化镍和草酸镍，十二烷基磺酸钠作为有机改性剂，浸渍法制备一系列纳米镍催化剂，并用XRD和TEM等技术对四组催化剂的物相、比表面积进行了表征。以葡萄糖加氢制山梨醇反应考察催化剂的活性，结果表明，纳米镍催化剂的活性与镍前驱体的性质，以及纳米镍的尺寸有着紧密关系。其中以氯化镍为前驱体制备的催化剂颗粒尺寸小且散度更高，在温度120℃，压力3.5 MPa下葡萄糖转化率可达93.9%，山梨醇的选择性可达90.1%，同时可循环使用3~4次。

A series of nickel nanoparticles catalysts were prepared by using different precursors,nickel ni-trate,nickel acetate,nickel chloride,and nickel oxalate,and sodium dodecyl sulphonate as organic modifi-ers. Catalyst phase and the specific surface area of catalyst have been characterized by means of XRD and TEM. The activity of catalysts were studied for the hydrogenation of glucose to sorbitol. The results show that the size and structure of nickel nanoparticles were close relationship with nickel precursor. When the nickel chloride particles as precursor,the catalytic has smaller diameter and higher divergence,thereby improving the catalytic activity. The glucose can be 93. 9% converted with 90. 1% selectivity to sorbitol at 120 ℃ and 3. 5 MPa pressure,and it can be recycled 3~4 times with no loss of catalytic activity.

实验考察了还原温度对红土镍矿回转窑直接还原生产粒状镍铁工艺中镍铁颗粒团聚长大的影响。试验结果表明,还原时间3 h、球团配碳比Xc/Xo为2、球团氧化钙配比7%,还原温度约1 360℃,此时还原产品镍铁颗粒粒径80%以上大于1 mm。温度偏低时,渣相粘度过大,不利于传质传热的进行,不利于镍铁颗粒团聚长大,降低了镍铁回收率;当温度过高时,还原体系中还原气氛相对更弱,导致镍铁颗粒中镍铁品位以及镍铁回收率有小幅下降趋势。综合考虑镍铁颗粒的产品质量和节能降耗等,选择熔炼温度为1 360℃。

The effect of reduction temperature on the grain size of ferronickel in directly reducing laterite with rotary kiln was studied. The results show that the optimal reduction temperature is 1 360℃ when c/o ratio of briquette is 2, the reduction time is 3 h and the Cao/ore ratio of briquette is 7%. Based on the reducing conditions, the grain size of more than 80% ferronickel particles is greater than 1 mm. When the temperature is low, the slag viscosity is large, which lead to the bad transfer of mass and heat, so the grain of ferronickel is hard to grow up, and the recovery rate of ferronickel is decreased. When the temperature is too high, the reducing atmosphere is lower in the reaction system, so the grade and recovery rate of ferronickel become lower. Hence, the optimal reduction temperature is 1 360℃ considering the quality of ferronickel and saving energy.