A method for solidifying and dry-stacking fine-grained tailings

Abstract

The invention discloses a curing and dry heaping method for fine grained tailings. A tailing dry heaping field is divided into 4-10 layers of spatial areas according to the occupied area of the tailing dry heaping field and the tailing discharge flow. The length of each layer of spatial area is 80-200 m, and the width L is equal to 40-60 m; and an outer foundation blocking dam (1) and an inner blocking dam (4) are heaped up on the two sides of the first layer of spatial area correspondingly, an outer tailing blocking dam (2) and an inner blocking dam (4) are heaped up on the two sides of each of the other spatial areas correspondingly, water-permeable geotextile materials (5) are laid in each layer of spatial area, and tailing slurry containing tailing curing agents are discharged into the spatial areas where the water-permeable geotextile materials (5) are laid, wherein the tailing slurry is concentrated till the weight concentration reaches 60+ / -2%. By the adoption of the layered and partitioned heaping mode, the nearest site of the dry heaping field can be selected according to an ore treatment plant, the distance between the heaping field and the ore treatment plant is decreased, the transportation cost of tailings is reduced, the construction project amount of tailing dams is small, the construction investment of the tailing dams is reduced, the construction time of the tailing dams is shortened, the adaptability is high, and the tailing dry heaping problem in pluvial regions of southern China is solved.

Description

technical field [0001] The invention relates to a tailings dry stacking method, in particular to a method for storing fine-grained mine tailings by solidification and dry-stacking technology. Dry stockpile disposal of mines. Background technique [0002] At present, the tailings storage in my country mostly adopts the traditional wet tailings storage method, that is, the construction of tailings storage. 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. The discharge and stockpiling of a large number of tailings has caused serious harm to the society, economy, and environment, leading to a series of problems such as waste of resources, destruction of vegetation, occupation of land, and aggravation of engineering disasters. [0003] In recent years, as the rese...

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Problems solved by technology

[0005] The purpose of the present invention is to aim at the above-mentioned problems in the prior art, and to provide a fine-grained tailings solidification and dry stacking method with strong adaptability and industrial application, which can improve the consolidation strength and shorten the consolidation time. cycle, and can solve the problem of tailings dry stacking in rainy areas in the south

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