Recovery of coal particles from a tailing dam for environmental protection and economical beneficiations

Abstract

Considerable amounts of coal particles are accumulated in the tailing dams of washing plants which can make serious environmental problems. Recovery of these particles from tailings has economically and environmentally several advantages. Maintaining natural resources and reducing discharges to the dams are the most important ones. This study was examined the possibility to recover coal particles from a tailing dam with 56.29% ash content by using series of processing techniques. For this purpose, gravity separation (jig, shaking table and spiral) and flotation tests were conducted to upgrade products. Based the optimum value of these processing methods, a flowsheet was designed to increase the rate of recovery for a wide range of coal particles. Results indicated that the designed circuit can recover over 90% of value coal particles and reduce ash content of product to less than 14%. These results can potentially be used for designing an industrial operation as a recycling plant and an appropriate instance for other areas to reduce the environmental issues of coal tailing dams.

Conventional and recent advances in gravity separation technologies for coal cleaning: A systematic and critical review

“…Recent studies about jig separation are looking into the effects of various parameters including inherently controllable (manipulated variables) and uncontrollable factors (disturbance variables) [ 94 , 97 , 102 , 103 ]. Moreover, studies on how to modify and apply jig separation for fine coal particles are increasing [ 98 , 103 , 104 ].…”

Destruction process and restoration countermeasures of the ecological environment of a comprehensive geological structure

“…Based on the current development of mining activities, a unified energy development enterprise joint system is established, and the overall development of regional resources is implemented to promote the formation and development of the overall economy. This is conducive to the industrial mix of energy-saving and emission reduction and circular economy and is more conducive to integrating funds and forces for comprehensive ecological environment improvement and pollution control (Asghari et al, 2018).…”

Estimation of Bed Expansion and Separation Density of Gas–Solid Separation Fluidized Beds Using a Micron-Sized-Particle-Dense Medium

“…With the Chinese policy of committing to reducing peak carbon dioxide emissions and achieving carbon neutrality, coal separation has recently become a hot topic, especially the gas-solid fluidized separation technology [1][2][3]. Therefore, the clean and efficient use of coal has attracted researchers' attention in various countries [4][5][6][7][8]. In general, wet methods are adopted for the clean utilization of coal, such as jigging [9], heavy medium cyclones [10,11], TBS [12,13], and flotation [14].…”