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。     

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。     

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。     

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。     

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。     

旋流微泡浮选柱分选系统的耗散结构分析

基于耗散结构理论,分析了入料因素、操作因素和环境因素对浮选柱分选效果的影响作用,构建了浮选柱分选系统的动力学方程和耗散结构模型,并将该模型应用于选煤生产,实践表明:ω的取值对柱分选系统的熵流模型非常关键,合理的对生产调控具有很大的理论指导意义。     

旋流微泡浮选柱在涡北选煤厂的应用

分析了涡北选煤厂煤泥粒度组成,发现煤样矸石存在泥化现象,高灰细泥含量较高,对浮选不利。进行了浮选机的单因素浮选试验、两因素三水平正交试验以及最优药剂条件下的分步释放试验,同时进行了浮选柱的煤泥浮选试验。结果表明,当煤泥矿浆质量浓度为45 g/L,复合药剂为1.10 kg/t时,精煤灰分为10.97%,精煤产率为72.62%,浮选完善指标最高为53.43%,浮选机煤泥浮选效果最好;浮选柱可以分选出各种质量的精煤,精煤灰分可调性大,可以适应市场变化。最后进行了浮选机和浮选柱的综合对比试验,在精煤灰分相近的情况下,浮选柱不同程度地提高了精煤回收率和浮选完善指标,具有明显优势。     

FCMC3500型旋流微泡浮选柱在新阳能源选煤厂的应用

新阳能源选煤厂为了提高精煤产率,采用FCMC3500型旋流微泡浮选柱,增设了细煤泥浮选系统;并采取一些列优化和改造措施,实现了浮选系统高效运行,使选煤厂精煤产率提高3.96%,经济效益显著。     

旋流微泡浮选柱分选粗颗粒粉煤的试验研究

采用FCMC-3000型浮选柱对低灰煤进行了分选试验,考察不同循环压力和不同充气量对0.5~0.25 mm粒级粗颗粒的回收效果;结果表明,降低循环压力有利于粗颗煤的回收,气盖开启一半的条件下,粗颗粒煤产量最大。     

FCMC型旋流微泡浮选柱在显德汪矿选煤厂的应用

介绍了FCMC型旋流微泡浮选柱的结构、性能以及工作原理 ;该设备在显德汪矿选煤厂实际应用一年多来 ,对无烟煤煤泥的分选取得了良好的效果 ,显德汪矿获得了良好的经济和社会效益。     

Replacing Mechanical Flotation Cells by a Flotation Column at the Pilot Plant of the Sarcheshmeh Copper Mine

Abstract

A flotation column could be considered as one of the major breakthroughs in the field of mineral processing in the last decades. Due to an increase in the trend of the use of these type of cells in the mineral processing plants, an investigation regarding the performance of these cells was initiated. The flotation column at the Sarcheshmeh pilot plant with some modifications was restarted. When all necessary measures were taken, the possibility of using the flotation cell in the cleaner and recleaner stages was investigated. Replacing the cleaner cells by the column flotation increased the separation efficiency by 7%. When the column cell was used as recleaner and both cleaner and recleaner, an improvement of 10% was observed. It was found that using a column cell instead of mechanical cells in addition to a decrease in repair and maintenance costs could result in 76% and 83% reduction in energy cost of cleaner and cleaner‐recleaner stages, respectively, at the pilot plant.     

Effects of Energy Input on the Laboratory Column Flotation of Fine Coal

This study explored the effects of energy input and different energy increase patterns on the separation performance of a laboratory cyclonic–static microbubble flotation column in fine coal flotation. The energy input was changed by adjusting the circulating pump power and pulp residence time. Continuous flotation tests were designed by using five feed rates (i.e., different pulp residence time), which were 53.33, 80.00, 106.40, 133.60, and 160.00 g/min, and various useful power of the circulating pump (22.44, 30.14, 38.50, 46.86, 56.10, and 64.46 W). Results show that concentrate combustible recovery initially increased before reaching saturation distribution with increasing energy input absolute value. An ash content of 10.90% and combustible matter recovery of 92.84% were obtained at the energy input of 10098.00 J which is called the flotation saturation energy Es. Es is the essential condition and guarantee for a complete flotation process. A low ash content of clean coal was obtained with low energy input. With the increase of energy consumption, the additional coals recovered were coarse particles with low ash content and fine particles with high ash content. However, the ash content did not exhibit a significant change with the increase of energy input in this investigation. During the flotation process, a minimum critical flotation time T and critical circulation pump useful power P are required. If the P and T of a variable are less than the critical value, high combustible matter recovery could not be obtained by adding another variable to increase energy input. A reasonable mode of energy input was proposed that the absolute value of the energy input reaches Es; meanwhile, it ensures that each value of the P and T is greater than the critical values.     

Application of Statistical Analysis on the Bubble Surface Area Flux in a Column Flotation Cell

Flotation is a widely used separation process with applications from mineral separation to de-inking of recycled paper, waste water treatment, and solid remediation. In flotation column, bubble surface area flux (S_b) has been reported to describe the gas dispersion properties, and it has a strong correlation with the flotation rate constant. No information is available regarding S_b for coal flotation in column cell. This paper describes the effects of hydrodynamic parameters on S_b by means of a 2³ factorial experimental design in designed flotation column using coal slurry. The results showed that S_b increased with increasing superficial gas velocity and frother concentration, but decreased with increasing solid concentration. The main and interaction effects of operating parameters on S_b were evaluated using Yates’ analysis. The statistical model was developed to predict S_b in column flotation cell using experimental data. This paper also presents the development of the statistical model and the validation using a number of additional data sets. There is a good agreement between experimental results and predicted results from the developed model.