Hydraulic transportation of grounded bottom ash for backfilling operation

Abstract

The objective of the present study was to investigate the physical, chemical, rheological and leaching characteristics of grounded bottom ash at high solid concentration with an additive of Nirma detergent.this study is also carried out to investigate the effect of additives on rheological behaviour of grounded bottom ash slurry suspension at higher precision. The Nirma detergent was used as additive and added in proportion of 0.1, 0.2 and 0.3% (by weight) at each concentration of grounded bottom ash slurry suspension. Both grounded bottom ash slurry suspension show Newtonian behaviour at 30% solid concentration (by weight) beyond this it depicts non Newtonian flow characteristics. The addition of additives Nirma detergent help to reduce the pressure drop effectively. The maximum reduction in pressure drop rate of grounded bottom ash was found with 0.2% addition of Nirma detergent whereas marginal reduction was observed with 0.1% and 0.3%. The present study can be useful for transporting grounded bottom ash with the addition additive at higher concentrations, through pipelines for mine backfilling purpose.