Ardealite harmlessly treated as ecological restoration material and method

Abstract

The invention discloses an ecological restoration material prepared from phosphogypsum through innocent treatment and a method. The ecological restoration material is prepared from the following raw materials in parts by weight: 5-10 parts of lime milk, 0.01-0.05 part of a water reducing agent and 0.01-0.05 part of a dispersing agent. The method is realized through chemical reaction, even if soluble phosphorus and fluorine in the phosphogypsum form insoluble compounds to passivate the phosphogypsum, the phosphogypsum can be used for ecological restoration if miscellaneous fill is needed for leveling terraces of concave terrains in building construction and earth surface backfill lamps are needed for open-cast mining, so that the phosphogypsum is harmless to the environment and has no pollution to the environment. The added water reducer can enhance the fluidity and play a role in lubrication, the dispersant can enhance the capacity of the particles and reduce the time and energy required for completing the dispersion process, and after the phosphogypsum is modified, the phosphogypsum is harmless and can be used as a filling material for ecological restoration; the problems of environmental influence caused by no repair after mining of various mines and natural disasters of landslide are solved.

Description

technical field [0001] The invention relates to the technical field of phosphogypsum treatment, in particular to a harmless treatment of phosphogypsum as an ecological restoration material and method. Background technique [0002] Phosphogypsum is a by-product of wet process production of phosphoric acid, and every ton of phosphoric acid produced will produce 3-5 tons of phosphogypsum. The most harmful components of phosphogypsum to the environment are soluble phosphorus and fluorine. At this stage, there are two main ways to deal with phosphogypsum: stockpiling and recycling. According to statistics, the phosphogypsum stockpiled in my country accounts for about 90% of its total output, and only a small part of phosphogypsum can be comprehensively utilized. If phosphogypsum is piled up, soluble phosphorus and fluorine will gradually transfer to the surrounding soil, groundwater and rivers under the erosion of rainwater, which will cause great pollution to the environment—ca...

AI Technical Summary

Problems solved by technology

[0003] At present, the harmless treatment technology of phosphogypsum is mainly based on chemical treatment. The basic principle of chemical treatment is to generate insoluble compounds by the reaction of certain cations with soluble phosphorus and fluorine, so as to realize its passivation. However, the raw materials used are all chemical Products, high material costs, and the lack of effective utilization of the treated gypsum hindered the implementation of these treatment technologies