Superfine all-tailing paste filling system and method

Abstract

The invention provides a superfine all-tailing paste filling system and method and belongs to the technical field of mining. The superfine all-tailing paste filling system comprises an all-tailing classifying system and a classified tailing paste filling system. By means of the superfine all-tailing paste filling system, superfine all-tailing slurry of a dressing plant is classified through a cyclone, overflowing fine tailings are discharged to a tailings pond through a slurry pump, underflow coarse-particle tailings enter an efficient thickener, are deep thickened and then enter a vertical buffer bin, then high-concentration tailing slurry is subjected to secondary stirring with binding materials so as to be mixed in a homogenized mode to form paste, and the paste enters a downhole to-be-filled empty area through a pipeline in an automatic-flowing conveying or pumping mode. By means of the method, the problems of difficult thickening of superfine tailings, low slurry concentration and low filling body strength are solved. The system has powerful buffering capacity, contradiction between dressing plant tailing continuous discharging and paste filling intermittent operation can be solved, and stable operation of mine production and downhole filling is guaranteed.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to an ultrafine tailings paste filling system and method. Background technique [0002] With the advantages of no segregation, no dehydration, and no stratification, paste filling has gradually become the development direction of filling mining technology in the 21st century. Ultra-fine full tailings are difficult to dehydrate due to the high content of fine particles. When used for underground filling, the filling concentration is low, the filling body has low strength, and the cost is high. Therefore, it is of practical significance to use ultra-fine whole tailings for paste filling, and the key lies in how to increase the concentration and increase the strength. The deep cone thickener can effectively increase the concentration of the whole tailings, which is a common equipment in the paste filling process, but the investment cost of the deep cone thickener is high; for the ultra...

AI Technical Summary

Problems solved by technology

The deep cone thickener can effectively increase the concentration of the whole tailings, which is a common equipment in the paste filling process, but the investment cost of the deep cone thickener is high; for the ultra-fine full tailings, the particle size is fine, the settlement speed is slow, and it is easy to run and mix; The concentration of the underflow is low, resulting in low strength of the filling body and poor filling effect

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