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滴管的鼓气、吹气和吸气搅拌操作
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作者 蔡成翔 《化学教育》 CAS 2004年第10期51-52,共2页
搅拌操作并不是可有可无的 ,它可以减少实验试剂的消耗量并提高实验结果的可靠性。在一些微型实验中 ,如果通过滴管的鼓气、吹气或吸气操作来代替玻棒的搅拌操作 。
关键词 普通化学 化学实验 滴管 鼓气搅拌操作 吹气搅拌操作 吸气搅拌操作
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混凝土的配合比质量检查、搅拌操作与运输 被引量:1
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作者 张冬巍 《黑龙江科技信息》 2014年第17期254-254,共1页
主要阐述了混凝土配合比的质量检查、混凝土搅拌操作程序、混凝土运输等问题。
关键词 混凝土 配合比 质量检查 搅拌操作 运输
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年产400t轻钙/重钙活性复合粉中试研究及生产 被引量:2
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作者 陈泉水 李顺如 《非金属矿》 CAS CSCD 北大核心 2003年第3期29-31,共3页
用表面改性法制备轻钙 /重钙活性复合粉的中试研究表明 :表面改性反应采用间歇式操作搅拌反应釜是合适的 ;小试提供的原料线路是可行的 ,工艺条件是正确的 ;进一步放大在满足工艺条件的前提下 ,单元反应时间不超过 60min ,中试装置的生... 用表面改性法制备轻钙 /重钙活性复合粉的中试研究表明 :表面改性反应采用间歇式操作搅拌反应釜是合适的 ;小试提供的原料线路是可行的 ,工艺条件是正确的 ;进一步放大在满足工艺条件的前提下 ,单元反应时间不超过 60min ,中试装置的生产能力为 40 0t/a,产品活性复合粉的表面改性效果较好 ,粒径为 0 95 μm ,收率达到 90 展开更多
关键词 轻钙/重钙活性复合粉 表面改性 中试研究 生产 间歇式操作搅拌反应釜 工艺条件 改性效果 非金属矿物填料
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Effect of some operational variables on bubble size in a pilot-scale mechanical flotation machine 被引量:4
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作者 张炜 J.E.Nesset J.A.Finch 《Journal of Central South University》 SCIE EI CAS 2014年第3期1077-1084,共8页
This work aims to provide a relationship of how the key operational variables of frother type and impeller speed affect the size of bubble (D32). The study was performed using pilot-scale equipment (0.8 m^3) that ... This work aims to provide a relationship of how the key operational variables of frother type and impeller speed affect the size of bubble (D32). The study was performed using pilot-scale equipment (0.8 m^3) that is up to two orders of magnitude larger than equipment used for studies performed to date by others, and incorporated the key process variables of frother type and impeller speed. The results show that each frother family exhibits a unique CCC95-HLB relationship dependent on n (number of C-atoms in alkyl group) and m (number of propylene oxide group). Empirical models were developed to predict CCC95 from HLB associated with other two parameters a and ft. The impeller speed-bubble size tests show that D32 is unaffected by increased impeller tip speed across the range of 4.6 to 9.2 m/s (representing the industrial operating range), although D32 starts to increase below 4.6 m/s. The finding is valid for both coalescing and non-coalescing conditions. The results suggest that the bubble size and bubble size distribution (BSD) being created do not change with increasing impeller speed in the quiescent zone of the flotation. 展开更多
关键词 FLOTATION bubble size operational variables critical coalescence concentration hydrophile-lipophile balance impellerspeed
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Electrodeposition of aluminum and aluminum-magnesium alloys at room temperature 被引量:6
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作者 阚洪敏 祝跚珊 +1 位作者 张宁 王晓阳 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第10期3689-3697,共9页
Electrodeposition of aluminum from benzene-tetrahydrofuran-Al Cl3-Li Al H4 was studied at room temperature. Galvanostatic electrolysis was used to investigate the effect of various parameters on deposit morphology and... Electrodeposition of aluminum from benzene-tetrahydrofuran-Al Cl3-Li Al H4 was studied at room temperature. Galvanostatic electrolysis was used to investigate the effect of various parameters on deposit morphology and crystal size, including current density, temperature, molar ratio of benzene/tetrahydrofuran and stirring speed. The deposit microstructure was adjusted by changing the parameters, and the optimum operating conditions were determined. Dense, bright and adherent aluminum coatings were obtained over a wide range of current densities(10-25 m A/cm2), molar ratio of benzene and tetrahydrofuran(4:1 to 7:8) and stirring speeds(200-500 r/min). Smaller grain sizes and well-adhered deposits were obtained at lower temperatures. Aluminum-magnesium alloys could potentially be used as hydrogen storage materials. A novel method for Al-Mg deposition was proposed by using pure Mg anodes in the organic solvents system benzene-tetrahydrofuran-Al Cl3-Li Al H4. XRD shows that the aluminum-magnesium alloys are mainly Al3Mg2 and Al12Mg17. 展开更多
关键词 ELECTRODEPOSITION aluminum coating aluminum-magnesium(Al-Mg) coating organic solvent system
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