Diuranate product fluorine reduction technique

Abstract

The invention discloses a diuranate product fluorine reduction technique which comprises the following steps: precipitating a qualified solution, and controlling the end pH value of the solution at 7-8; settling, and discharging the supernate; analyzing the contents of fluorine and uranium in the slurry; fluorine removal treatment: adding 1-2 times by volume of 20-30g.L<-1> NaOH solution into the slurry, sufficiently stirring to react for 0.5-1 hour while controlling the pH value of the solution at 12-14, standing to settle for 1 hour, and removing the supernate; and washing with clear water, and carrying out solid-liquid separation. The NaOH solution is added as the defluorinating agent to control the pH value and generate the precipitate, stirred and subjected to solid-liquid separation, 1-2 times volume of the tap water is used for washing the slurry, and the solid-liquid separation is carried out to obtain the diuranate product with qualified fluorine content. The technique is simple to operate, and has the advantages of low fluorine removal cost and favorable fluorine removal effect; and the fluorine content of all the treated diuranate product produced by the uranium ore enterprise satisfies the national standard of lower than 0.2%.

Description

technical field [0001] The invention belongs to the technical field of defluorination of diuranate products produced by uranium mining enterprises, and in particular relates to a process for defluorination of diuranate products. Background technique [0002] Fluoride is symbiotic with uranium ore, and part of the fluorine will be transferred to the solution during the processing of uranium ore. On the one hand, it will cause environmental pollution of fluorine and bring harm to people's health; If the content exceeds the standard, the post-treatment process such as purification is complicated, and the treatment cost increases. With the implementation of the strategic policy of "actively developing nuclear power" in my country, the production scale of uranium ore production enterprises will continue to expand. The fluorine environmental pollution caused by the processing of uranium ore and the excessive fluorine content of "111" products have become increasingly prominent. ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a process for reducing fluoride in diuranate products, which aims to solve the problem that the fluorine content of diuranate products produced by many uranium ore production enterprises exceeds the standard in recent years, which will affect the subsequent purification treatment. and lead to increased processing costs

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