Multi-source fluorine-containing waste residue glass ceramic solidified body as well as preparation method and application thereof

Abstract

The invention provides a multi-source fluorine-containing waste residue glass ceramic solidified body and a preparation method and application thereof. The glass ceramic solidified body is prepared from, by weight, 12.0-85.0% of fluorine-containing waste residues and 15.0-88.0% of auxiliary materials; the preparation method comprises the following steps: mixing the fluorine-containing waste residues with auxiliary materials, melting, and sequentially molding, annealing and crystallizing to obtain a microcrystalline glass solidified body. The microcrystalline glass solidified body can synchronously digest various fluorine-containing waste residues, stabilize and solidify fluorine elements in the waste residues, realize harmless and safe treatment and full-amount resource utilization of thefluorine-containing waste residues, and can be widely applied to the fields of new energy, chemical engineering, metallurgy, intelligent manufacturing, rare earth, aviation, buildings, mines, environmental protection and the like.

Description

technical field [0001] The invention belongs to the field of harmless disposal of hazardous solid waste, and in particular relates to a multi-source fluorine-containing waste residue glass-ceramic solidified body and its preparation method and application. Background technique [0002] Inorganic fluoride products have the characteristics of high performance, high added value, and high technology content, and are known as the modern "golden industry". However, inorganic fluoride waste will cause great harm to the environment and human body. For example, the settlement of fluorine-containing dust or the leaching of rainwater will pollute the soil and groundwater. At the same time, fluorine is an accumulative poison, which has a great impact on the growth and survival of animals and plants. It is easy to form fluorine with symptoms such as bone and joint deformation. Bone disease can also cause chronic inflammation of the respiratory tract, cause periodontitis and other disease...

AI Technical Summary

Problems solved by technology

[0006] CN 105130346A discloses a method for safe disposal of fluorine-containing solid waste. The method includes the following steps: firstly adding a calcium compound to the fluorine-containing solid waste; then adding a curing agent to form a Finally, it is buried; this method uses anti-seepage treatment to block the diffusion of fluorine ions in waste residues, but anti-seepage treatment is difficult to block the penetration of fluorine elements for a long time, and fluorine ions can enter the soil and groundwater in the later stage of landfill, forming a large amount of Fluorine clay, causing the risk of secondary pollution

[0007] CN 105256156A discloses a process for decomposing fluorine-containing rare earth molten salt waste slag. The process includes the following steps: raw material drying of fluorine-containing rare earth molten salt electrolysis waste slag, powder making, roasting and alkali conversion, washing the alkali melt to remove fluorine, and obtaining fluoride Calcium, hydrochloric acid dissolution and callback of acid solution; although this process can utilize part of the waste residue, it will still produce a certain amount of fluoride to pollute the environment, unable to stably solidify the fluorine element, and easily cause secondary pollution

[0008] CN 104805292A discloses a method for separating and recovering valuable components in rare earth praseodymium-neodymium molten salt electrolysis waste. The method includes the following steps: processing, beating, and leaching raw materials to obtain filter residue containing praseodymium-neodymium fluoride and chloride-containing Filtrate of praseodymium neodymium; wash the filter residue containing praseodymium neodymium fluoride to neutrality, and dry at 60°C to 80°C to obtain praseodymium neodymium fluoride; use oxalic acid method to crystallize and precipitate the filtrate containing praseodymium neodymium chloride to obtain oxalic acid Neodymium praseodymium, the obtained neodymium praseodymium oxalate is burnt at 950°C, and decomposed to obtain neodymium praseodymium oxide; this method produces a large amount of waste residue containing calcium fluoride in the process of recovering valuable components, which is difficult to handle

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