Full tail sand direct slurrying cementing filling process

详情

Process introduction

     Full tail sand direct slurrying cementing filling process refers to the filling method that taking whole grain-grade tail sand without classification and desliming as the filling aggregate, to be pumped to vertical (or horizontal) sand silo from concentration plant for natural sedimentation, and be conveyed to mix with a certain percentage of cementing material and water after metering, and then be filled into underground worked-out section.

   “Slurry like paste” cementing filling system designed by our company for Shandong Dongping Hongda Iron Ore Company, takes concentration plant tail sand as the raw material, uses alkali-activated cementing material as the cementing material. Full tail sand in vertical sand silo can be made into slurry through wind and water linkage activation, and be conveyed to electromagnetic flow meter for metering through pipeline; cementation powder stored in material silo will be automatically metered and proportioned by screw conveyor and screw metering scale; the filling material will be stirred in high speed by high concentration stirred tank; the prepared filling slurry will flow naturally to the filling area through filling drilling hoe and laying pipeline.

Technical innovation 

Through drawing lessons from bushy technology at home and abroad, the company upgrades the vertical sand silo technology to shorten sedimentation time of full tail sand, and mix them with cementing material when the concentration is about *0%. The covering area of this process is relatively small, and the overflow water will flow back to the plant.
    The company achieves full tail sand utilization, to reduce the pressure of tailing.

    The company adopts the new alkali-activated cementing material, to solve the problem of degradation in water and no-cementation of superfine tail sand.
     The company adopts wind pipe cleaning system, to reduce pipeline flushing water consumption and relieve the pressure of underground roadway drainage.