Treatment method of strongly alkaline silicon-rich uranium-containing solution

Abstract

The invention particularly relates to a treatment method of a strongly alkaline silicon-rich uranium-containing solution, which comprises the following steps: analyzing the components of the strongly alkaline silicon-rich uranium-containing solution, and determining the content of impurity components capable of reacting with a precipitant to generate a precipitate under an alkaline condition; calculating the theoretical addition amount of the precipitant through a chemical equation; determining the actual adding amount of a precipitant; starting stirring, uniformly adding a precipitant into the storage tank in which the alkaline silicon-rich uranium-containing solution is stored, and reacting the impurity component with the precipitant to generate a precipitate; solid-liquid separation is carried out on reactants, a liquid phase can be used for preparing a resin silicon removal agent, and a solid phase is subjected to acid pickling treatment; and the slurry obtained after acid pickling is filtered, harmless treatment is conducted on the solid phase, and uranium in the liquid phase is recycled. According to the treatment method of the strong-basicity silicon-rich uranium-containing solution, waste water discharge is reduced, and meanwhile alkali liquor is recycled.

Description

technical field [0001] The invention relates to the technical field of silicon-rich wastewater treatment, in particular to a treatment method for a strongly alkaline silicon-rich and uranium-containing solution. Background technique [0002] In the acid leaching uranium process, the ion exchange process is used to extract uranium. The adsorption raw solution contains silicic acid. During the ion exchange process, the silicic acid in the solution continuously accumulates in the resin, resulting in a decrease in the ion exchange performance of the resin. In order to ensure the ion exchange performance of the resin, it is generally necessary to treat the resin with sodium hydroxide to remove the silicic acid in the resin and restore the ion exchange performance of the resin. [0003] Treatment of the resin with sodium hydroxide produces a partially strongly alkaline solution rich in sodium silicate and uranium. This part of the solution is more difficult to handle, direct disc...

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Problems solved by technology

[0004] Based on this, it is necessary to provide a treatment method for strongly alkaline silicon-rich uranium-containing solution in view of the difficult problem of strong alkaline silicon-rich uranium-containing solution in the process of acid in-situ leaching uranium mining. Water-soluble calcium-containing agents are added to silicon-uranium-containing solutions to convert sodium silicate soluble under alkaline conditions into insoluble calcium silicate, thereby separating it from the solution. The separated solution can be returned to prepare antidotes. Recycling of lye while reducing waste water discharge

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