A safe and environmentally friendly stacking method for a valley-type phosphogypsum storage

Abstract

The invention discloses a safe and environment-friendly piling method for a valley-type phosphogypsum warehouse. According to the safe and environment-friendly piling method, a minimum dry beach separation dam (8) is arranged around the interior of the valley-type phosphogypsum warehouse in a circle at the preset spacing away from the front of a phosphogypsum dam (2) and a mountain slope (10); a flood regulation dry beach separation dam (8') is arranged around the interior of the valley-type phosphogypsum warehouse in 0.45 to 0.55 of a circle at the preset spacing away from the minimum dry beach separation dam (8), and starts from the end of the minimum dry beach separation dam (8); after being discharged from a slurry discharging pipe (3), phosphogypsum slurry is guided by a spiral linearseparation dam to form a spiral alluvial beach surface; water in the phosphogypsum slurry finally gathers in a clarification area (5) inside the valley-type phosphogypsum warehouse; and the average slope of a minimum dry beach (6) and a flood regulation dry beach (7) reaches 0.26% to 0.42%. The safe and environment-friendly piling method disclosed by the invention has the beneficial effects thatthrough the guide by the spiral linear separation dam, the alluviation of phosphogypsum around a filling warehouse and the spiral rise can be achieved, thereby greatly prolonging the deposition time,guaranteeing the high clarity of water in the clarification area (5) inside the valley-type phosphogypsum warehouse, and reducing the running cost of the valley-type phosphogypsum warehouse.

Description

technical field [0001] The invention belongs to the technical field of phosphogypsum storage engineering, and in particular relates to a stacking method for a valley-type phosphogypsum storage, and is especially suitable for constructing a large-scale phosphogypsum storage using natural valley wet storage. Background technique [0002] Phosphogypsum is a by-product solid waste in the production process of phosphate fertilizer industry, and 5 tons of phosphogypsum are produced for every 1 ton of phosphoric acid produced. The main component of phosphogypsum is calcium sulfate dihydrate, and its content is as high as more than 90%. In recent decades, with the rapid economic development, my country's phosphate fertilizer industry has developed greatly, and its production and sales have ranked first in the world for many years. In 2000, my country's annual output of phosphogypsum was 10 million tons, and in 2012 it had reached 70 million tons. According to incomplete statistics...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the technical problems of high phosphogypsum excavation and dam construction costs and difficult laying of HDPE geomembrane existing in the wet storage mode of large-scale phosphogypsum storage, and to provide a safe and environmentally friendly storage system for valley-type phosphogypsum storage. stacking method

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