Composite anti-seepage structure for red mud tailing ponds

Abstract

The invention discloses a composite anti-seepage structure for red mud tailing ponds, which comprises an anti-seepage layer, a flexible protective layer and a rigid protective layer, wherein the anti-seepage layer is arranged on a side slope, the flexible protective layer is arranged on the anti-seepage layer, the rigid protective layer is arranged under the anti-seepage layer, an isolating layer is also arranged between the rigid protective layer and the anti-seepage layer, wheat straws or rice straws and clay are mixed to form the isolating layer, and the materials of the anti-seepage layer include polycarbonate, polytetrafluoroethylene, polybutylene terephthalate, fly ash, hammer-milled glass fibers, graft copolymerization acrylic acid derivative, antioxidant, ultraviolet light absorber and anti-aging agent. The physical and chemical properties of the adopted anti-seepage materials are stable, the low-temperature properties and the ageing resistance are excellent, the right-angled tear resistance is high, the reliability of joints is high, the strength of the whole anti-seepage layer structure is high, and the composite anti-seepage structure has extremely high tensile strength and elongation in order to adapt to local anti-piercing strength on sand and stones in a large-area tailing stack, thus ensuring that wastewater from red mud cannot seep into the ground during the usage of the stack.

Description

technical field [0001] The invention relates to the treatment of tailings ponds, in particular to a composite anti-seepage structure of red mud tailings ponds. Background technique [0002] The raw material of the aluminum smelting industry is usually bauxite, and the remaining mineral residue after extracting the active components of the bauxite is the aluminum industry tailings, usually called red mud. Red mud is a kind of red soil-like particle composition substance. Its mineral composition is relatively complex. It mainly contains minerals such as alumina, iron oxide and silicon oxide. It usually shows strong alkalinity and corrosiveness. Because red mud and its seeping liquid (red mud attached liquid) are strongly alkaline and corrosive, they are very destructive to the environment and have great destructive power to adjacent animals and plants, so the safe stacking of red mud Survival issues are particularly important. The site where the red mud is stored becomes the...

AI Technical Summary

Problems solved by technology

The biggest problem for the reservoir area and dam body is its stability and anti-permeability, among which the stability issue is the most important. Once the red mud tailings pond breaks, a large amount of red mud and red mud attached liquid will leak out, which will It poses a huge threat to the life and property safety of nearby residents and the surrounding environment

In order to prevent the harmful substances in the industrial tailings from leaking out and polluting the soil, the industrial tailings should be treated with anti-seepage. Usually, anti-seepage cloth is set on the slope of the mountain, and a certain thickness of yellow is covered on the anti-seepage cloth. The purpose is to prevent the anti-seepage cloth from being directly exposed to the atmospheric environment and prevent the anti-seepage cloth from aging too quickly due to wind and sun. However, in the actual construction process, due to the influence of the height of the slope and the gravity of the soil The anti-seepage cloth covered on the slope will be torn, especially when the rainfall is abundant, the soil covered by the anti-seepage cloth is easy to be washed away, and the anti-seepage cloth is easily damaged, which directly affects the anti-seepage Effect

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