Laboratory-scale results show that both the mechanical flotation machine and flotation column as re-cleaning flotation devices could produce the clean coal with qualified ash content. However, the yield obtained by the flotation column 84.49 is significantly higher than that obtained by the mechanical flotation cell 68.21.
Keywords coal fly ash, unburned carbon, flotation cell, flotation column Introduction Coal fly ash is a major solid product of thermal power plants that is fine and powdery. It can cause pollution if discharged into the environment. The most immediate environmental concern is the way of using coal fly ash. Coal fly ash is also used in
Fly ash, which is nominally solid wastes generated during the combustion of coal, contains plenty of valuable minerals. Thus, comprehensive recovery of these valuable minerals not only solves environmental pollution problems but also realizes secondary utilization and added values increase of fly ash resources. The Joint process flow of flotation and magnetic separation was adopted in the ...
Unburned carbon UC in coal fly ash indicates the waste of energy source and is an obstacle to the utilization of coal fly ash. The purpose of this study was to investigate the flotation kinetics ...
Figure 1 Flotation triangle showing the factors affecting performance. The Jameson Cell technology was first introduced in the late 1980s to overcome the design and operating inadequacies that were being experienced with column and conventional flotation cells.
Eisele, T. C., and Kawatra, S. K., Reverse Column Flotation of Iron Ore, Minerals and Metallurgical Processing, 2007, Vol. 24, No. 2, pp. 61-66
For each of the three fly ashes, froth flotation reduced the LOI of the ash to less than 2, which is well below the ASTM specification of no more than 6.0 LOI for Class F fly ash.
An industrial fly ash sample was cleaned by three different processes, which were triboelectrostatic separation, ultrasonic column agglomeration, and column flotation, cleaned an industrial fly ash sample. The unburned carbon concentrates were collected at
A very good separation of unburned carbon from fly ash was achieved with a laboratory flotation machine by employing a mixture of 4-dodecylphenol DDP and hexadecane HXD as a collector. No other reagent was required. Good results were obtained by recleaning either the concentrate or the tailings in two-stage flotation tests.
Column flotation is one of the most important new developments to emerge in mineral processing technology in the last 50 years. Currently there is much research and development interest worldwide, and Professors Finch and Dobby are among the leading practitioners in the field. Column Flotation covers both fundamental and applied aspects ...
The purpose of this study was to investigate the performance of a new cyclonic-static micro-bubble flotation column for removal of unburned carbon from coal fly ash compared with a traditional ...
The utilization of combustion byproducts, in particular fly ash, has an important impact on the cost and environmental impact of power production from coal. Improved beneficiation and utilization schemes fo r high loss-on-ignition LOI fly ash can transform this combustion byproduct from a waste material, wit h
Feb 01, 2017 In order to improve the flotation efficiency of high ash fine coal slime, flotation column was used to study the flotation of slime in Ertang Coal Preparation Plant. Firstly, industrial analysis and sieving test of the floating slime were carried out. The results show that the flotation efficiency is the best when the collector dosage is 400g t and the amount of foaming agent is 600g t ...
How to improve the utilization of fly ash has become one of focus points. In this work, hydrocyclone was adopted for classification after decarburization in a flotation column. Hydrocyclone showed a very good classification performance. In overflow, the particles were all smaller than 85m. About 97.34 of the particles were smaller than 25 m.
The release of heavy metals into the environment has resulted in a number of environmental problems. The aim of this study was to perform a laboratory investigation to assess the feasibility of immobilizing the heavy metals in copper flotation waste. For this purpose, samples of copper flotation waste were immobilized with fly ash FA.
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