Separation performance of mechanical flotation cell and cyclonic microbubble flotation column: in terms of the beneficiation of high-ash coal fines

2019 ◽  
Vol 42 (23) ◽  
pp. 2845-2855
Author(s):  
Guangqian Xu ◽  
Yuran Chen ◽  
Xiangning Bu ◽  
Xianshu Dong ◽  
Guangyuan Xie ◽  
...  
Keyword(s):  
Separation Performance ◽  
Flotation Column ◽  
Flotation Cell ◽  
High Ash Coal ◽  
Coal Fines

scholarly journals Study on the effects of some parameters on the flotation performance of Vang Danh coal fines -0.3 mm in the reflux flotation cell

2020 ◽  
Vol 61 (2) ◽  
pp. 68-75 ◽  
Author(s):  
Dung Kim Thi Nhu ◽  
Son Hoang Nguyen ◽  
Chinh Thi Vu ◽  
Duoc Van Tran ◽  
Keyword(s):  
High Capacity ◽  
Wash Water ◽  
Pressurized Water ◽  
Flotation Reagents ◽  
Bubble Liquid ◽  
Flotation Column ◽  
Flotation Cell ◽  
Flotation Columns ◽  
Liquid Segregation ◽  
Coal Fines

In the world, the coal fines usually are upgraded in flotation columns (Jameson, Pneufloat, Microcell,...). The reflux flotation cell is a novel type of flotation column that uses a system of inclined channels to enhance bubble - liquid segregation in flotation. Additionally, in this type of device, it is used a special froth washing mechanism with pressurized water to ameliorate the quality of cleaned coals. This type of device has a simple structure, high capacity and allows to receive cleaned coals of high quality. This paper presents the test results of coal fines samples -0,3mm from Vang Danh Mine by flotation in a laboratory Reflux flotation cell. In the test works, some process parameters are investigated and optimized: flotation time, pulp density, feed rate, froth height, wash water, and flotation reagents regime.

Experimental Research of Roughing and Cleaning Column Flotation of Difficult-to-Float High Ash Coal

2014 ◽  
Vol 1010-1012 ◽  
pp. 1603-1608 ◽  
Author(s):  
Jian Zhong Wang ◽  
Xian Bo Zhang ◽  
Hai Bin Qin ◽  
Li Tan
Keyword(s):  
Coal Sample ◽  
Ash Content ◽  
Clean Coal ◽  
Flotation Concentrate ◽  
Flotation Column ◽  
Flotation Tailing ◽  
Concentrate Yield ◽  
Coal Slime ◽  
High Ash Coal ◽  
Preparation Plant

Coal slime in Zhongcheng coal preparation plant in Baotou, Inner Mongolia, was analyzed. It is found that this coal sample is with high inner ash content and very difficult to float. It is hard to obtain low ash concentrate and high ash tailing with primary flotation. The live scale required ash content is 12.00% for total clean coal, 15.00% for flotation concentrate. It is found that the lowest concentrate ash content is 29.24% through exploring flotation experiments, which can not meet the producing requirement. Results of timed release flotation experiment show that when concentrate ash content is 15.00%, the theoretical concentrate yield is 24.36%, with 50.03% of flotation tailing ash content and 35.49% of combustible matter recovery. It can be concluded that the floatable grade of this coal sample is Very Difficult to Float. So flotation column is taken into account. The lowest concentrate ash content of roughing flotation by flotation column is 18.94%, which does not meet the requirement, either. Results of cleaning flotation of roughing flotation concentrate show that when the recycling pressure is 0.14 MPa, the concentrate ash content is 14.15% with a yield of 30.39%, which is satisfactory and can be referred to direct industrial production.

Separation performance of flotation column with inclined plates in the froth zone

2016 ◽  
Vol 148 ◽  
pp. 124-127 ◽  
Author(s):  
Peng Yaoli ◽  
Ni Chao ◽  
Tan Jiakun ◽  
Sha Jie ◽  
Xie Guangyuan
Keyword(s):  
Separation Performance ◽  
Flotation Column ◽  
Inclined Plates

scholarly journals Demineralization of high ash coal fines of Indian origin using Mahua oil

2021 ◽  
pp. 100222
Author(s):  
Saswati Chakladar ◽  
Prasanjeet Kumar Patar ◽  
Dhiraj Vishwakarma ◽  
Ashok Mohanty ◽  
Subhajit Mallick ◽  
...  
Keyword(s):  
Mahua Oil ◽  
Indian Origin ◽  
High Ash Coal ◽  
Coal Fines

scholarly journals Bubble Size Distribution Characteristics of a Jet-Stirring Coupling Flotation Device

Minerals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 369 ◽  
Author(s):  
Youli Han ◽  
Jinbo Zhu ◽  
Liang Shen ◽  
Wei Zhou ◽  
Yunjia Ling ◽  
...  
Keyword(s):  
Size Distribution ◽  
Bubble Size ◽  
High Speed ◽  
Bubble Size Distribution ◽  
Sampling Location ◽  
Flotation Column ◽  
Flotation Cell ◽  
Positive Linear Correlation ◽  
Feeding Pressure ◽  
Pressure Suction

In this study, a new jet-stirring coupling flotation device that incorporates the advantages of three conventional flotation machines (specifically, Jameson cell, mechanical flotation cell, flotation column) was designed based on jet suction. The suction capacity of a double cosine self-aspirated nozzle utilized by the device was analyzed under different feeding pressures, and the effects of frother concentration, feeding pressure, suction capacity, and height of sampling location on the bubble size distribution (BSD) were investigated using a high-speed video system. It was found that a large amount of air was sucked into the flotation cell by the self-aspirated nozzle arranged in a non-submerged manner, which met the requirements of flotation in terms of the suction amount of air. The suction capacity showed a positive linear correlation with negative pressure inside the nozzle. When the Methyl isobutyl carbinol (MIBC) concentration reached the critical coalescence concentration (CCC), the bubble size stabilized at approximately 0.31 mm, which was smaller than the bubble size produced by the conventional flotation machine. This indicated that bubbles suitable for flotation were generated. D32 linearly decreased with increasing of feeding pressures and conversely increased with increasing suction capacities and sampling location heights, independent of the frother concentration.

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