Thickener underflow concentration adjusting system

Abstract

The invention discloses a thickener underflow concentration adjusting system including a discharge port communicating with the bottom of a thickener, a high-concentration slurry pump for pumping a high-concentration slurry at the bottom to an upper-layer slurry return port, and a low-concentration slurry pump; one end of the low-concentration slurry pump is connected to a slurry outlet of the thickener, the other end of the low-concentration slurry pump communicates with the high-concentration slurry pump, and the low-concentration slurry pump is used for making a pumped low-concentration slurry mixed with the pumped high-concentration slurry; the slurry outlet is higher than the slurry return port. According to the concentration adjusting system provided by the invention, because the pumped high-concentration slurry and the pumped low-concentration slurry are mixed with each other and then outputted, and the concentration of the slurry transported to the thickener after final mixing is similar to the concentration of a transported part. The concentration in the thickener is increased layer by layer from top to bottom, after a bottom slurry is pumped out, an upper slurry layer moves downwards to supplement, and the concentration at the bottom is reduced. The slurry after mixing cannot have the concentration greatly different from the concentration of the upper-layer slurry, so disturbance to the upper-layer slurry is avoided and dynamic equilibrium of the slurry of all layers is overall maintained.

Description

technical field [0001] The invention relates to the technical field of thickener concentration control, in particular to an underflow concentration adjustment system of a thickener. Background technique [0002] With the increasing depletion of mineral resources, the importance of mining safety and environmental protection has become increasingly prominent. Safe, efficient and environmentally friendly mining of ore has become an important issue faced by mining. Paste filling has developed rapidly in recent years and has been widely used because of its technical advantages in terms of stability, fluidity, pumpability, energy saving and environmental protection. Paste filling is to prepare the whole tailings with high fine particle content through a dense process to prepare a paste slurry without delamination, segregation, and precipitation, and then pump it to the underground space for filling to ensure the safety of subsequent mining . The thickening process of fine-grade ...

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used method is to pump the high-concentration slurry at the bottom of the thickener back to the top through the pump body, which often causes a large difference in concentration from the original slurry, causing system disorder and affecting the output of the thickener itself.

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