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Technical
Note Effect of Conditioning on the
Beneficiation of Dilute Coking Coal Fines by Froth Flotation
The coal preparation plants produce large quantities of coal slurry having
very dilute pulp density (3 to 5 percent) during desliming of coals. Froth
flotation is a universally accepted process for the beneficiation of coal
fines, but the process being sensitive needs careful monitoring of the
process variables. One of the prerequisites for flotation of slurry is to
have an effective conditioning for proper adsorption of reagents with the
coal particles. In this paper attempts have been made to upgrade low pulp
density coal fines by designing a suitable conditioner and carrying out
laboratory flotation test by varying some important process variables like
pulp density, reagent (collector and frother) dosage. The effects of these
variables on the results of flotation have been studied. Correlations have
also been developed between yield/ash percent of concentrate and the
variables through regression analysis. A statistical analysis is presented
to study the effects and interactions of the variables. |
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