Fluorine-reducing and phosphorus-removing inorganic cementation stabilization treatment process based on phosphorus-poor mud

Abstract

The invention discloses a fluorine-reducing and phosphorus-removing inorganic cementation stabilization treatment process based on phosphorus-poor mud. The purposes of reducing fluorine and releasing phosphorus of the phosphorus-poor mud are fulfilled synchronously by adding an alkaline reagent into the ground phosphorus mud; and then solid-liquid separation is conducted, and an inorganic cementing agent is added into filter residues for stabilizing treatment. The reactivity and flammability of the phosphorus-poor mud treated by the process can be eliminated, and the corresponding requirements in the Standard for Pollution Control on Landfill of Hazardous Waste are met. According to the technical scheme, a stabilizing treatment mode for reducing fluorine and removing phosphorus is provided for the phosphorus-poor sludge which is difficult to realize resource utilization.

Description

technical field [0001] The invention relates to the technical field of waste treatment, in particular to an inorganic cementation stabilization treatment process based on phosphorus-poor mud for reducing fluoride and phosphorus. Background technique [0002] Phosphorus mud is a kind of milky colloidal substance, which is formed by combining solid substances such as elemental phosphorus, dust and carbon black with water in most cases. Phosphorus in phosphorus mud is adsorbed by carbon black and silica, and a protective layer is formed on the surface of phosphorus through the hydration of the hydration film, which prevents the yellow phosphorus particles from aggregating, which in turn causes the yellow phosphorus particles to be wrapped by other impurities. According to the phosphorus content in phosphorus mud, it can be divided into phosphorus-rich mud, phosphorus-poor mud and weak phosphorus mud. At present, most of the treatment methods for phosphorus sludge are to prepar...

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Problems solved by technology

For phosphorus sludge with low phosphorus content, in most cases, phosphorus sludge pools will be built to simply store it, which will not only occupy a large amount of land area, cause waste of land resources, but also cause soil erosion in case of leakage , destroying the surrounding ecological environment

Moreover, the untreated phosphorus sludge contains a certain amount of elemental phosphorus, which has the risk of spontaneous combustion in a high temperature environment and has certain safety hazards

In addition, due to the requirements of the upstream product process, the phosphorus sludge produced contains a certain amount of soluble fluoride. If the fluoride in the phosphorus sludge infiltrates into the soil through precipitation, etc., it will cause soil and groundwater pollution.

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