微泡浮选柱选煤技术

分析了微泡浮选柱的理论基础，气泡大小与浮选速率的关系，气泡大小对生产能力的影响．另外还介绍了实验室、半工业和工业生产规模微泡浮选柱的分选效果．很显然，减小气泡直径是改善超细粒物料回收率和取得最大处理能力的关键因素     

新结构浮选柱的试验研究

作者分析了浮选柱分选特征及所存在的严重问题,详细地阐述了新结构浮选柱的结构特征,并示出了部分试验结果。试验表明,新结构浮选柱优于传统浮选柱,放大效应小;半工业性新结构浮选柱与实验室新结构浮选柱的选别效果相当;新结构浮选柱中增设预矿化器和微泡发生器可使浮选效果大为改善。     

溶气-柱浮选技术处理含Cr（VI）废水的研究

结合溶气气浮技术和柱浮选技术的优点,提出用溶气-柱浮选技术处理含Cr(Ⅵ)废水的思路.采用φ50 mm的浮选柱,通过特制的溶气释放器在柱体内产生微泡.介绍了该技术的工艺流程及原理.采用水合肼(N2H4·H2O)为还原剂,AlCl3为絮凝剂,十二烷基硫酸钠(sDS)为表面活性剂,考察了废水pH控制、溶气压力、回流比、絮凝剂及表面活性剂浓度对浮选效果的影响.实验结果表明,在优化操作参数的条件下,处理效果很好,废水中Cr(Ⅵ)的去除率达98%以上.     

新型短体浮选柱的研究

介绍一种新型短体浮选柱──旋流器式浮选柱的结构，工作过程及分选状况；分析探讨了旋流力场在降低浮选柱高度方面的独特作用及显著效果，指明该浮选柱是一种工艺性能完备的新型短体浮选柱。     

浮选柱的结构及其发展

浮选柱具有结构简单，节能，投资少，流程简单等优点，有与机械搅拌浮选机竞争的能力．近年来，国内外对浮选柱的研究和应用日益增多。出现了一些新型的浮选柱。     

射流浮选柱气泡发生器及其充气性能的研究

根据射流泵原理设计了一种浮选柱气泡发生器，并对其充气性能进行了试验，研究了气泡发生器结果参数、流体压力、负压与柱内含气率的关系；探讨了浮选过程中浮选药剂浓度、矿浆浓度变化对含气率的影响．结果表明：气泡发生器的射流面积比对含气率有较大影响，最佳面积比为6～10；含气率随压力增高而增加，压力升到一定程度后，含气率趋于平稳；当气泡发生器吸气室负压达到一定数值后，含气率也将趋于饱和；随起泡剂用量加大，含气率呈上升趋势；随矿浆浓度的增加，含气率则呈下降趋势．研究结果为射流浮选柱气泡发生器的设计和结构优化提供了依据。     

溶气-柱浮选技术处理含Cr(Ⅵ)废水的研究

结合溶气气浮技术和柱浮选技术的优点,提出用溶气-柱浮选技术处理含Cr(Ⅵ)废水的思路.采用φ50 mm的浮选柱,通过特制的溶气释放器在柱体内产生微泡.介绍了该技术的工艺流程及原理.采用水合肼(N2H4·H2O)为还原剂,AlCl3为絮凝剂,十二烷基硫酸钠(sDS)为表面活性剂,考察了废水pH控制、溶气压力、回流比、絮凝剂及表面活性剂浓度对浮选效果的影响.实验结果表明,在优化操作参数的条件下,处理效果很好,废水中Cr(Ⅵ)的去除率达98%以上.     

浮选柱反浮选胶磷矿的影响因素

浮选柱是一种高效的细粒物料分选设备,但应用于胶磷矿浮选仍然受诸多因素制约.为考查浮选柱结构特征、工作参数和操作条件等因素对其分选效果的影响,采用试验室浮选柱对贵州瓮安磷矿进行了单一反浮选试验,重点研究了矿浆浓度、药剂用量、筛板充填方式和充气量对浮选柱反浮选效果的影响.结果表明,在磨矿细度为-0.074 mm占88％、矿浆浓度为25％（质量分数）、油酸钠用量为1.8 kg/t、硫酸用量为5 kg/t和充气量为400 L/h时,反浮选的分选效果较好.由于浮选柱可以通过充填筛板来改善其分选环境,因此在较优条件下,其分选效率比用浮选机时高1.57％.     

用胶质气体泡沫从废水中浮选Cu(Ⅱ)的实验研究

采用胶质气体泡沫作为浮选载体对含Cu(Ⅱ)模拟废水进行了浮选分离实验．在浮选柱中装入特定浓度的含Cu(Ⅱ)模拟废水，用表面活性荆十二烷基磺酸钠(SDS)制备胶质气体泡沫，将胶质气体泡沫引入到浮选柱，然后通入压缩空气形成常规柱浮选气泡完成浮选过程．此外，还考察了pH值、SDS用量和Cu(Ⅱ))初始浓度对分选效果的影响．实验结果表明，采用胶质气体泡沫和常规柱浮选结合的方法对含Cu(Ⅱ)模拟废水的铜离子去除率可达99％以上。     

浮选柱的分选原理与参数选择

从浮选柱的分选原理出发,指出影响浮选柱分选效果的各种因素,通过试验,确定了浮选柱分选煤泥时的最佳操作参数。     

Separation of Oil from Wastewater by Column Flotation

A new type of device, a dissolved-air flotation column, was developed for separation of oily wastewater.The unique design idea of the dissolved-air flotation column is the combined use of dissolved-air flotation and column flotation.The dissolved air release occurred within the column separation system.As a potential application the column was investigated for its performance in separating emulsified oil droplets in oily wastewater.A high separation efficiency was obtained in a series of tests.The aeration performance of the bubble generator used in the dissolved-air flotation column was also studied in particular.     

Numerical simulation of a self-absorbing microbubble generator for a cyclonic-static microbubble flotation column

The Cyclonic-Static Microbubble Flotation Column (FCSMC) is currently a widely used, novel type of flotation device. The self-absorbing microbubble generator is the core component of this device. The structure of the microbubble generator directly influences flotation column performance by affecting bubble size and distribution as well as gas holdup in the column. However, the complicated flow inside the generator results in high R&D costs and difficulty in testing. Thus, the CFD software, FLUENT, was used to simulate the gas-liquid two-phase flow inside a self-absorbing microbubble generator. The effect of area ratio, a key structural parameter, was studied in detail. Critical flow-field parameters including velocity, turbulent kinetic energy, minimum static pressure and gas holdup were obtained. The simulation results demonstrate that the optimum area ratio is 3.     

A honeycomb-tube packing medium and its application to column flotation

We address problems in the development of large-scale flotation columns that use short cylinders. As a starting point, we investigated the packing medium to identify a highly efficient internal packing for the flotation column. The chosen packing was a honeycomb structure with an aperture diameter of 80 mm, a web thickness of 0.80 mm, a film height of 1000 mm, packed into a 400 mm diameter space, which completely filled the vessel at optimal cost. The column consisted of a modular ring of single-hole hexagonal honeycomb tube packing made from atactic polyproplene (PP-R). The packing was tested in a cyclonic, static mi-cro-bubble flotation column. Computational fluid dynamic modeling was used to analyze the flotation fluid in a honeycomb tube packed flotation column. Our results show that the fluid axial movement was maximized and that the transverse fluid velocities were zero in the vicinity of axial flow. Using the honeycomb tube packing for copper sulfide flotation we observed that the average concentration in the product was increased to 25.41%, from an average feed concentration of 0.729%, with an average recovery of 92.92%. The demands of on-site industrial production were met.     

Particle Residence Time in Column Flotation Based on Cyclonic Separation

The cyclonic static micro-bubble column flotation （FCSMC） is an effective separation device for fine particle treatment. The high mineralization rate and short flotation time of this equipment can be attributed to its unique cyclonic force field. It also has been observed that the presence of a cyclonic force field leads to a lower bottom separation size limit and a reduction of unselective entrainment. The collection zone of the column is considered to consist of two parts, a column separation zone and a cyclonic zone. Total recovery of the collection zone was developed. For our study, we analyzed the particle movement in the cyclonic zone. Particle residence time equations for the cyclonic zone were derived by force analysis. Results obtained in this study provide a theoretical foundation for the design and scale-up of the FCSMC.     

缓冲袋气柱成型机控制系统

根据实际控制要求,选用三菱的控制器,通过触摸屏进行人机对话,光电传感器对卷膜的位置进行识别,完成了硬件系统和软件平台的搭建。实践证明,采用该控制方案,性能安全可靠,降低了生产成本,自动化程度高,有效提高缓冲袋的生产效率和质量。     

SFC型充填式浮选柱的研究及应用

国内外大量研究结果表明充填式浮选柱是一种可供选矿、化工、造纸和废水处理等行业用于精选细粒矿物、粉煤除灰脱硫及其它物料分离的设备,与目前所用的浮选设备相比,具有结构简单,能耗低、分选效率高、操作容易等优点。     

Research on Pressure Drop Performance of the Packing-Flotation Column

A packing-flotation column was proposed to optimize the flotation environment A research system was established using a 100 mm diameter cyclonic micro-bubble flotation column to study fluid properties. Dry-plate and wetplate pressure drops were studied and the corresponding pressure drop equations developed. The results show that the dry-plate pressure drop of the packing cyclonic micro-bubble flotation column is 10-15 times less than that of the chemical tower, which is principally shown in its relatively small resistance coefficient, ξ = 0.0207. The wet-plate pressure drop is 2-3 times higher than that of the chemical tower, which is largely caused by the separation materials and characteristics of the equipment. With flotation, the greater the pressure drop, the better the flotation environment.