FCMC-3000型旋流微泡浮选柱的应用分析

介绍了浮选柱的结构、特点及其工业应用的效果。分析了浮选柱利用微泡浮选、逆流浮选及旋流离心力场强化分选的机理。分析了入料、操作及环境因素对浮选柱分选系统的影响。工业应用表明,FCMC-3000型旋流微泡浮选柱能在保证精煤质量条件下,提高精煤回收率。     

预浮选式浮选柱分选细粒粉煤的实验研究

分析了传统旋流微泡浮选柱的应用现状,阐述了浮选入料性质及条件特别是入料浓度对浮选柱分选效果的影响,提出了采用预浮选式旋流微泡浮选柱分选解决高浓度细粒煤浮选的新方法,并通过试验论证了该方法的可行性,对工业现场的浮选作业具有一定的指导意义。     

FCMC型旋流微泡浮选柱在新疆的应用前景

介绍了新疆的煤炭工业现状，阐述了FCMC型旋流微泡浮选柱的工作原理、结构和应用优势，进行了浮选柱与传统浮选机的性能对比，论述了微泡浮选柱在新疆煤炭洗选工业的应用前景。     

微泡旋流浮选柱在中梁山选煤厂的应用

简述了微泡旋流浮选柱的工作原理；归纳了浮选柱的操作要点。与ＸＪＭ－４型浮选机的生产技术指标对比表明，微泡旋流浮选柱适用于细粒煤泥浮选。     

影响旋流微泡浮选柱工作的因素分析

介绍了旋流微泡浮选柱的工作原理及结构,分析了影响其工作的各主要因素,为更好的使用旋流微泡浮选柱提供依据。     

大直径旋流微泡浮选柱在盘江矿区的应用

介绍了旋流微泡浮选柱的结构与工作原理、技术特点,在盘江矿区选煤厂的应用表明,相同条件下,微泡浮选柱所选精煤灰分比浮选机精煤灰分低约2%,浮选精煤产率提高3.33%,企业取得了较好的经济效益。     

XZWXJ-45静态旋流微泡浮选柱在粉煤灰处理方面的应用

介绍了XZWXJ-45静态旋流微泡浮选柱的结构、工作原理及特性参数,主要性能特点及其在粉煤灰浮选脱炭工艺中的应用效果。分析了影响浮选柱工效的因素。     

西南某磷矿柱式正反浮选工艺研究

采用实验室型旋流-静态微泡浮选柱对我国西南地区某难选硅-钙质胶磷矿进行了柱式正反浮选工艺研究.以XM-10作为正浮捕收剂,水玻璃作为硅酸盐矿物抑制剂和矿浆分散剂,以硫磷混酸作为磷矿物抑制剂,PA-64作为碳酸盐矿物捕收剂,考察了磨矿细度、药剂用量等因素对浮选指标的影响.结果表明,采用旋流-静态微泡浮选柱正反浮选工艺可以得到精矿P2O5品位29.92%、MgO质量分数0.73%、磷回收率85.97%的浮选指标,简化了胶磷矿浮选工艺流程.     

FCMC旋流微泡浮选柱的研制与开发

ＦＣＭＣ旋流微泡浮选柱是一种新型高效的细粒分选设备。本文重点介绍其原理、结构及在选煤领域的开发应用,阐述其在选矿行业的广泛应用前景。     

FCSMC-3000×6000旋流-静态微泡浮选床的应用

介绍了旋流 静态微泡浮选床的工作原理、主要性能,神火煤电公司选煤厂采用旋流—静态微泡浮选床生产浮选精煤的实践表明,该设备运行可靠,电耗低,分选选择性好,产品质量稳定。     

CFD SIMULATION ON INFLUENCE OF SUPERFICIAL GAS VELOCITY,COLUMN SIZE,SPARGER ARRANGEMENT,AND TAPER ANGLE ON HYDRODYNAMICS OF THE COLUMN FLOTATION CELL

The use of flotation columns in the mineral processing industry has experienced a remarkable growth over the years. The detailed hydrodynamics study of a column flotation cell demands the solution of mass, momentum, phase-transfer, and turbulence quantities. Simulations have been carried out to examine the influence of superficial air velocity, column size, column taper angle, and sparger arrangement on hydrodynamics of the column flotation cell. A commercial CFD software package (ANSYS CFX 10.0) has been used to predict the complex unsteady air-water flow. The k-ε turbulence model for shear-induced turbulence, Sato's eddy viscosity model for bubble-induced turbulence, and the effect of interfacial momentum transfer terms (lift force, wall force) were considered. Present findings suggest use of low height-to-diameter ratio, low airflow rate, small column taper angle, and uniformly distributed sparger to achieve good separation in a column flotation cell.     

浮选柱与浮选机分选煤泥的对比试验研究

通过浮选柱和浮选机对不同煤泥的浮选试验，分析比较了２种浮选方法在分选煤泥时的各自优缺点，证实了浮选柱在浮选细粒细煤泥时具有良好的发选效果；并通过试验，给出了各自最佳的浮选粒度范围。     

气浮塔处理含油废水的研究

在实验研究的基础上，结合单级气浮技术和多级板式塔理论，开发出两级气浮塔处理含油废水的新工艺，实现了塔釜一次曝气、多级气浮的分离。实验研究了气浮塔板的流体力学性能、布气性能及操作条件对废水处理效率的影响，结果表明二级气浮塔处理效果很好，是一种具有良好应用前景的新型含油废水处理装置。     

浮选柱在磷矿选矿中的应用研究

采用浮选柱设备进行磷矿的选矿实验研究。通过化学法分析磷矿的矿物特性,采用浮选柱分选技术,开展磷矿精选试验。结果表明,在充气量为6～10 L/h,冲洗水2～3 L/h可以得到w(P2O5)=30%以上的磷精矿。     

Adsorption and column flotation studies on talc using anionic and cationic collectors

Adsorption properties and column flotation were studied to investigate the interaction of the anionic and cationic collectors and flotation recoveries for talc mineral. Adsorption capacity is dependent on pH, adsorption time, temperature, collector concentration, and particle size. Langmuir adsorption model was suitable for describing isotherms. Analyses were carried out using UV spectrometry. In this study, we analyzed some parameters affecting column flotation performance. It was determined that adsorption capacity, especially, had an important role in column flotation enrichment.     

浮选柱中液相轴向返混的研究

An experimental study on the axial dispersion of liquid was carried out in a 0.382-m-ID flotation column packed with different structured packings or free of packings. The correlations of axial Peclet numbers with the liquid and gas superficial Reynolds numbers were developed for various packings. Among the packings tested, it is found that in the column packed with 250Y or 350Y packings the axial dispersion is the lowest. The addition of frother can decrease the axial dispersion. By the simulation analysis of the one-dimension dispersion model of packed flotation column, it is found that small axial dispersion, high collection rate constant and low axial liquid velocity can increase the collection zone recovery.     

浮选柱结构参数对锶的浮选率影响的研究

研究了浮选柱浮选法对锶的浮选。考察了在锶最优浮选条件下浮选柱的高度、直径、布气室、微孔发泡器型号及柱形变化对浮选柱浮选法的影响。通过实验可知,浮选柱直径、发泡器、布气室、球型浮选柱都对锶的浮选率都有很大的影响;而浮选柱高度对浮选率的影响不大,但是在相同条件下,合适浮选柱高度可以缩短浮选时间;当选择合适的尺寸和球形柱,锶的浮选率最高可以达到97%。     

The influence of frother types and concentrations on fine particles’ entrainment using column flotation

Entrainment which is the characteristic feature of fine particles is closely related to water recovery. It is based on the changes depending on the establishment of linear relationship between water recovery and solid recovery. This paper deals with the investigation of the effect of frother types and concentrations on fine particles’ entrainment using column flotation. Entrainment of fine particle using a mixture of artificial ore (celestite:calcite; 1:1) was investigated in column flotation. In a two-phase system (water/air), the variation of bubble diameters and gas hold-up with a superficial air rates using different frother types and concentrations were tested. The results showed that the frother types and concentrations had significant effect on the grade and recovery, superficial air rate, gas hold-up and fine gangue entrainment. Entrainment factors for frother types and concentrations were compared in flotation column. Kirjaveinen^[11] model was used for describing the specific entrained factor (P_i) of hydrophilic particles. It has been found that Kirjaveinen model supports the results of this study.     

Picobubble Enhanced Fine Coal Flotation

Abstract

Froth flotation is widely used in the coal industry to clean ?28 mesh fine coal. A successful recovery of particles by flotation depends on efficient particle‐bubble collision and attachment with minimal subsequent particle detachment from bubble. Flotation is effective in a narrow size range beyond which the flotation efficiency drops drastically. It is now known that the low flotation recovery of particles in the finest size fractions is mainly due to a low probability of bubble‐particle collision while the main reason for poor coarse particle flotation recovery is the high probability of detachment. A fundamental analysis has shown that use of picobubbles can significantly improve the flotation recovery of particles in a wide range of size by increasing the probability of collision and attachment and reducing the probability of detachment.

A specially designed column with a picobubble generator has been developed for enhanced recovery of fine coal particles. Picobubbles were produced based on the hydrodynamic cavitation principle. They are characterized by a size distribution that is mostly below 1 µm and adhere preferentially to the hydrophobic surfaces. The presence of picobubbles increases the probability of collision and attachment and decreases the probability of detachment, thus enhancing flotation recovery. Experimental results with the Coalberg seam coal in West Virginia, U.S.A. have shown that the use of picobubbles in a 2″ column flotation increased fine coal recovery by 10–30%, depending on the feed rate, collector dosage, and other flotation conditions. Picobubbles also acted as a secondary collector and reduced the collector dosage by one third to one half.