Storage device and method for improving discharging concentration stability of vertical sand silo

Abstract

The invention belongs to the field of mine filling, and relates to a storage device and method for improving the discharging concentration stability of a vertical sand silo. The storage device and method are characterized in that a tailing slurry self-dilution device, a polyacrylamide solution nozzle and a feeding shaft are additionally arranged on a silo body, and a shearing circulating pump, an electric reversing valve, a circulating pipe and a discharging pipe are designed at the bottom. According to the storage device and method, energy consumption is small, and a harrow frame in a thickener is omitted; the vertical sand silo can achieve the continuous feeding and discharging functions, the treating capacity is improved, and the height of a slurry layer is stabilized; a bottom slurry making device of the vertical sand silo is omitted, and therefore the inner structure of the silo is greatly simplified; the discharging concentration of the vertical sand silo can be substantially increased, and the bottom flow tends to be stable.

Description

technical field [0001] The invention relates to the field of mine filling, in particular to a storage device and method for improving the discharge concentration stability of a vertical sand bin, and is suitable for metal mines where full tailings need to be densely dehydrated. Background technique [0002] In the field of mine filling, the vertical sand bin is a common device for storing tailings mortar and increasing the concentration of tailings mortar. After a certain concentration of tailings mortar is graded, it is input from the top of the sand bin and concentrated by natural settlement in the sand bin. Slurry is made, and then discharged through the sand discharge pipe at the bottom, mixed with other materials as filling slurry. [0003] At present, the following problems generally exist in vertical sand bins: (1) natural settlement, resulting in segregation of tailings in the bin, poor homogeneity of mortar particle size composition along the height direction, unabl...

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Problems solved by technology

[0003] At present, the following problems generally exist in vertical sand bins: (1) natural settlement, resulting in segregation of tailings in the bin, poor homogeneity of mortar particle size composition along the height direction, unable to form ideal high-concentration mortar; (2) only feeding The feeding speed of tailings is fast, the top has interference settlement, and the turbidity of overflow water is high; (3) There is no special feeding well, the settlement path is long, and the settlement speed is slow; (4) The concentration at the bottom is too high after standing settlement , has lost fluidity, and the only way to restore its fluidity is through pulping measures. The process is not easy to control, resulting in low concentration of underflow; (5) Continuous feeding and continuous discharging cannot be realized, and the height of the mud layer in the warehouse cannot be stabilized. The range of height changes is large, and the sand concentration and sand flow rate are unstable

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