Abstract:

The high-grade mine tailings backfill made up from phosphogypsum and phosphor slag enhances multipurpose utilization of mineral resources, prevents collapse and cracking of mountain massif, and alleviates environmental pollution by utilization of industrial waste.The concentration of the tailings backfill slurry has a remarkable influence on its workability and strength.With an appropriate concentration, tailings backfill slurry can not only guarantee the self-flowing capability but also ensure its desirable strength development.Phosphor slag gradually hydrates and hardens under the effect of activator.Together with phosphogypsum, phosphor slag develops into a crystal composition whose strength increases with increasing addition of phosphor slag.Slurry’s self-flowing capability can achieve simplification of tailings backfill and reduction of its cost.