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.

Use of hydrocyclone and flotation column for reducing the volume of contaminated dredged material

2006 ◽  
Vol 53 (7) ◽  
pp. 151-157 ◽  
Author(s):  
K.H. Park ◽  
J.H. Lee ◽  
B.H. Bae ◽  
Y.H. Kim ◽  
Y.K. Choung
Keyword(s):  
Heavy Metals ◽  
Integrated Treatment ◽  
Reduction Ratio ◽  
Volume Reduction ◽  
Wash Water ◽  
Column Flotation ◽  
Preliminary Treatment ◽  
Primary Concern ◽  
Flotation Column ◽  
Transmission Oil

As sediment contamination problems have recently been raised in Korea, the need for technologies to clean contaminants in sediments has increased. Although the recalcitrant organic matters and heavy metals in the contaminated sediments are of primary concern, large amounts of sediment makes the removal of the contaminants in them more difficult. In this study, the performance of hydrocyclone and flotation column was tested to reduce the volume of contaminated dredged materials (CDMs) prior to treating recalcitrant matters, such as various organic chemicals and heavy metals, in an integrated treatment system. When hydrocyclone was operated with 10% (w/v) solids concentration of the feed slurry, the total solids of upflow products were 4 to 7% (w/v) when the inlet pressure was changed from 1.0 to 2.0 kg/cm2. The volume reduction ratio of CDMs by hydrocyclone was approximately 90% (v/v). When the upflow products in hydrocyclone was then spiked with automobile transmission oil and fed to the flotation column to see the performance of the column flotation on the volume reduction and the TPH removal, 44% of the TPHs in feed were removed at the tails and the volume reduction ratio of CDMs by column flotation was 18% at 200 L/min of wash water. The flotation column could be proposed as a potential preliminary treatment process of CDMs prior to subsequent biological treatments.

Exploratory Study of Gold Recycle from the Tailing of All-Sliming Cyanidation CIP

2014 ◽  
Vol 878 ◽  
pp. 348-352
Author(s):  
Shuai Xing Shi ◽  
Deng Feng Han ◽  
Ming Tan ◽  
Qiang Li
Keyword(s):  
Organic Carbon ◽  
Negative Influence ◽  
Industrial Test ◽  
Gansu Province ◽  
Column Flotation ◽  
Flotation Process ◽  
Flotation Column ◽  
Metallic Mineral ◽  
Flotation Columns ◽  
Leaching Residue

Gold ore is processed by all-sliming cyanidation CIP (carbon in pulp) at a gold mine in Gansu province of China. The leaching residue (tailing) Au grade is about 0.52 g/t, which is much valuable to be recovered. Mineralogical analysis shows that the loss of gold in leaching residue is mainly organic carbon adsorption gold and inclusion gold, accounting for 45.55% and 54.45% respectively. The inclusion gold is mostly wrapped by gangue and metallic mineral separately, accounting for 35.56% and 18.89%. Excluding the gold in gangue, both the gold adsorbed by organic carbon and wrapped in metallic mineral could be recycled by flotation process. Study has been carried out for recovering gold in cyanide residue by solely column flotation apparatus. During the semi-industrial test, B and E type sparger were adopted in flotation columns to evaluate their influence on process performance. To further improve metallurgy technology the ultrasonic device was introduced into flotation column tank. The results showed that ultrasonic pretreatment is negative influence, and the E type sparger is better than B type sparger. The concentrate Au grade is up to 10.14g/t, and34.3% of Au lost in tailing was recovered while feed grade being 0.52g/t. The column flotation process was proven being a proper way to recycle gold from the tailing of all-sliming cyanidation CIP.

A Study of the Rejects Recovery in a Column Flotation

2005 ◽  
Vol 498-499 ◽  
pp. 278-284 ◽  
Author(s):  
M.S. Oliveira ◽  
D.R. Cioqueta ◽  
M. Sallum ◽  
R. Miro ◽  
R.C. Guimarães ◽  
...  
Keyword(s):  
Column Flotation ◽  
Flotation Process ◽  
Rational Use ◽  
Flotation Column ◽  
Different Types ◽  
Flotation Columns ◽  
Flotation Technique ◽  
Useful Life ◽  
Discontinuous Mode ◽  
Rice Oil

Performing of the flotation process in columns started in the year 1981. Since then, this new flotation technique became usual in many countries, including Brazil, where nowadays flotation columns are installed in plants for iron and phosphate ore concentration. Sees the need of a rational use of the phosphate of Barreiro, Araxá (MG), whose medium useful life is esteemed in 30 years, Federal University of Uberlândia in partnership with Bunge Fertilizers looks for in this work to develop conditions for use of the rejects of the flotation process. A laboratory flotation column was operated in discontinuous mode in order to examine the mixture of two different types of collectors, ore conditioning time and reagents dosages. Contents between 22 and 29 % P2O5 were obtained and Apatite recovery varied in the range of 18 to 58 wt %. The results shows that the use of mixture of the synthetic reagent KE and the rice oil soap provided an increase considerable in the selectivity of the concentrate.

Effect of Bias Flow on Flotation Efficiency in a Packed Column

2013 ◽  
Vol 781-784 ◽  
pp. 2797-2802
Author(s):  
Jun Ji ◽  
Yi Gang Ding ◽  
Lei Liu ◽  
Li Wei Wang ◽  
Yuan Xin Wu
Keyword(s):  
Water Flow ◽  
Flow Rate ◽  
Separation Efficiency ◽  
Water Flow Rate ◽  
Packed Column ◽  
Wash Water ◽  
Reverse Flotation ◽  
Flotation Process ◽  
Flotation Column ◽  
Bias Flow

Bias flow is an important parameter in a flotation process of packed column. An experiment related to P2O5 recovery of phosphate rock was designed to study the effect of bias flow on the flotation separation efficiency by a direct-reverse flotation circuit of packed flotation column. The results have showed that the recovery of P2O5 is high during the combination of the direct-reverse flotation circuit. The grade and yield of P2O5 can reach to 32.77% and 82.64% respectively, under the condition of the range of-0.005~0 cms-1 of bias flow, 0.013~0.020 cms-1 of the wash water flow rate in the direct flotation column, and the range of 0.006~0.009 cms-1 of bias flow, 0.027~0.035 cms-1 of wash water flow rate in the reverse column.

scholarly journals Recovery of clean coal from blast furnace dusts by flotation column

2020 ◽  
Vol 61 (1) ◽  
pp. 124-131 ◽  
Author(s):  
Tran Van Duoc ◽  
Nguyen Hoang Son ◽  
Nhu Thi Kim Dung ◽  
Vu Thi Chinh ◽  
Keyword(s):  
Blast Furnace ◽  
Ash Content ◽  
Wash Water ◽  
Solid Concentration ◽  
Flotation Reagent ◽  
Clean Coal ◽  
Flotation Column ◽  
Coal Flotation ◽  
Coal Product ◽  
Water Rate

The paper presents the results of the study on recovery of clean coals from blast furnace dusts of the Cao Bang Iron Steel plant. The study has explored the effects of the most important operating parameters on the coal flotation performance including flotation reagent dosage, solid concentration, froth wash-water rate, flotation time and the froth thickness. The results of the study showed that using a combination of a rougher and a cleaning flotation operations at respectively collector dosage, solid concentration, flotation time, froth wash-water rate and froth thickness of 1000 g/t, 100 g/l, 10 minutes and 1.5 l/minute and 450 mm, has obtained a clean coal product with the yield, ash content and combustible matter recovery respectively of 44.90%, 19.15% and 77.63%. The clean coal has met the quality strandards requirements of the fuel for sintering.

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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