Rheological Properties of Ultra-Fine Tailings Cemented Paste Backfill under Ultrasonic Wave Action

Minerals

Rugao Gao¹  Maoxin Hou²  Youzhi Zhang²  Weicheng Ren² 

[1] College of Resources and Safety Engineering, Central South University, No. 932, Lushan Road (South), Changsha 410083, China;School of Mining Engineering, North China University of Science and Technology, No. 21, Bohai Road, Tangshan 063009, China;

关键词: ultra-fine tailings cemented backfill (UCPB);    rheological properties;    ultrasonic waves;    slurry pipeline transportation;   

DOI  :  10.3390/min11070718

来源: DOAJ

【 摘 要 】

Ultra-fine tailings cemented paste backfill (UCPB) exhibits special rheological characteristics with the effect of an ultrasonic sound field. In this study, in order to explore the thickening effect of slurry under ultrasonic wave action, we examined the rheological properties with ultrasonic wave tests of UCPB and the rheological properties after ultrasonic wave tests of UCPB. We found that the rheological curve of the slurry changed; the Herschel–Bulkley (HB) model in the initial state transformed into the Bingham model under the action of ultrasound. Ultrasonic waves have a positive effect on reducing slurry viscosity and yield stress. The rheological test of the slurry with ultrasonic wave action had a positive effect on significantly reducing the apparent viscosity and initial yield stress of slurry with a 62% mass concentration. The rheological test of slurry with ultrasonic wave action and the rheological test after ultrasonic wave action both have positive effects on reducing the viscosity and yield stress of the slurry with a 64% to 68% mass concentration; the overall effect of reducing the viscosity and yield stress of UCPB is greater after ultrasonic wave action of UCPB.

【 授权许可】

Unknown