A method suitable for dry-stacking fine-grained tailings on flat land or beside mountains

Abstract

The invention discloses a method suitable for conducting dry heaping on fine grained tailings on a flat ground or beside a mountain. The mode that dry heaping damming is conducted on the four sides of the flat ground and the tailings are discharged in the middle is adopted, or the mode that dry heaping damming is conducted on three sides beside the mountain and the tailings are discharged in the middle is selected, each side of a tailing dry heaping field is divided into 4-10 layers of space areas, and each layer of space area is 80-200 m in length and 40-60 m in width L. An outside foundation blocking dam (1) and an inside blocking dam (4) are built in a heaping mode on the two sides of the first layer of space area correspondingly. Outside tailing blocking dams (2) and inside blocking dams (4) are built in a heaping mode on the two sides of the other layers of space areas correspondingly. Water-permeability earthwork materials (5) are paved on each layer of space area. In addition, tailing slurry is concentrated to be 60+ / -2% in weight concentration, a tailing curing agent is added to the tailing slurry, the obtained tailing slurry is discharged into the space areas paved with the water-permeability earthwork materials (5), and heaping is conducted by layer and area. Through the method, the distance between the heaping field and a dressing plant is shortened, the tailing conveying cost is reduced, tailing dam building investment and time are reduced, and the adaptability is high.

Description

technical field [0001] The invention relates to a tailings dry stacking method, in particular to a method capable of solidifying and dry-stacking fine-grained tailings on flat land or beside a mountain. Regional dry stacking for fine-grained tailings disposal. Background technique [0002] At present, the vast majority of tailings in China still use wet discharge, that is, tailings ponds are built and tailings ponds are used to store tailings. According to statistics in 2012, my country has more than 12,000 tailings ponds, the total amount of tailings stockpiles has exceeded 10 billion tons, and more than 1 billion tons of tailings are added every year, most of which are discharged to tailings stockpiles. Although this processing method is convenient, it has brought various disadvantages at the same time. First of all, the tailings pond needs a large area of ​​land, and the huge tailings hydraulic conveying system is composed of pumps and pipelines, which consumes a lot of...

AI Technical Summary

Problems solved by technology

After the tailings filter press dry stacking technology is applied in actual projects, the daily processing capacity can reach 5000t, realizing dry tailings stacking and bringing certain economic benefits, environmental benefits and safety benefits, but due to the technical design The tailings dry stockpile still needs to build sand control dams, spillways, infiltration water collection systems, water quality monitoring wells and other facilities, and the filter press technology has a small processing capacity for fine-grained tailings, and the construction and operation costs are high. Suitable for large-scale dry stacking of fine tailings on flat land

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