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Method for solidifying much waster liquid based on alkali slag cement

A technology of alkali slag cement and high-level waste liquid, applied in the field of building materials, alkali slag application and treatment of radioactive waste, can solve the problems of large proportion of radioactivity, poor anti-leaching performance, etc., to protect the environment, reduce pollution, and be conducive to sustainable development effect of development

Inactive Publication Date: 2008-09-10
NANJING RUIDI HIGH TECH
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Problems solved by technology

However, direct curing under normal temperature and pressure has a large proportion of radioactivity, and Cs + The nature is relatively active, so the cement solidified body still has certain problems in its anti-leaching performance, especially the poor high-temperature anti-leaching performance of high-level radioactive waste liquid: 137 Cs is one of the main heat release products in high-level radioactive waste. + Leaching resistance is an important parameter
At present, the research on the solidification of high-level radioactive waste liquid by alkali slag cement is still in the exploratory stage, and the solidification technology needs to be continuously improved. The properties of the solidified body, especially Cs + The performance of ion curing needs to be further improved

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  • Method for solidifying much waster liquid based on alkali slag cement
  • Method for solidifying much waster liquid based on alkali slag cement

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] craft see figure 1

[0019] The effective volume of the reaction vessel is 1 liter

[0020] The simulated high-level waste liquid is based on the composition of typical high-level waste liquid in my country (320 grams of salt, 2molHNO acidity 3 / L) prepared. Measure 0.5 liters of simulated feed liquid into the reaction container, add 0.12 g of nickel compound and 0.29 g of ferrocyanide and stir for 30 minutes. After standing for 24 hours, heat with 0.5-2.1 kilowatt microwave at 99 ° C for 20 minutes, add Ca ( Oh) 2 60 grams of the neutralized pH value is 12, and then heated by 0.5-2.1 kilowatt microwave at 99° C. for 20 minutes, and the water content of the waste liquid is controlled at 45% to 50%.

[0021] The content of zeolite is 50%-70%, and the specific gravity is 1.94g·cm -3 The high-silica zeolite is ground to a 0...

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Abstract

The invention discloses a method for hardening the high-level liquid waste of alkali slag cement. The high-level liquid waste is pre-treated by ferrous nickel potassium cyanide, then Ca(OH)2 (calcium hydroxide) is utilized to neutralize and alkalify the liquid waste, and then the liquid is premixed and stored with the zeolite and mixed with the alkali slag and a stimulator, finally the liquid waste is hardened by pressurization under certain water-glue ratio to be a solidified body, the containing volume of the waste can reach 16% (counted by oxide). The method provides a new pre-treating and normal temperature solidification method so as to lead the high-level liquid waste to be solidified by the alkali slag at low temperature to obtain the solidified body with excellent performance.

Description

technical field [0001] The invention belongs to the field of building material technology application and radioactive waste treatment, and particularly relates to a practical technology for treating radioactive waste contained in radioactive waste to a state where the impact on human beings in the future is below the allowable limit by using alkali slag to treat radioactive waste . Background technique [0002] At present, the cement solidification process of low and medium level waste liquid has achieved fruitful results through a lot of research work, and has been successfully used in production practice. Facts have proved that the cement curing method is superior to other curing processes both technically and economically. Whether cement solidification technology can be used for high-level radioactive waste has been doubted by most people. However, because cement solidification has outstanding advantages such as simple process, good long-term stability, and low cost, pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/04G21F9/16
Inventor 王冬陈国新唐修生蔡明黄国泓祝烨然李克亮陈健王毅温金保邢有红刘兴荣
Owner NANJING RUIDI HIGH TECH
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