7 results about "Natural uranium" patented technology

The present application relates to a kind of large-scale industrial grade natural uranium extraction column modeling simulation method.Establish the mass transfer diffusion model of pulse baffle extraction column, establish the thermodynamic model of uranyl nitrate extraction process, establish the hydraulics model of pulse baffle extraction column, the thermodynamic model of uranyl nitrate extraction process and the hydraulics model of pulse baffle extraction column are combined, mass transfer diffusion model is solved using Runge-Kutta method, i.e., the uranyl nitrate concentration result of outlet water phase and organic phase of pulse baffle extraction column can be calculated;The calculation result is checked, the final calculation result is obtained for the output meeting the requirements, and the calculation is returned again for the output not meeting the requirements.The present application can simulate the extraction process of uranyl nitrate with concentration up to 450g / L in industrial pulse baffle column, the simulation result has high precision, and the error between simulation result and measured value of uranyl nitrate extracted by real pulse baffle extraction column is within 8%.

The invention discloses a logistics intelligent management system and method applied to natural uranium buckets, and relates to the technical field of logistics managements.According to the logistics intelligent management system and method, information is obtained and classified by scanning labels of the natural uranium buckets, the unused, used and unqualified natural uranium buckets are treated respectively, it is ensured that the natural uranium buckets to be used are safe and reliable, and the logistics management efficiency is improved. And a qualified container is provided for subsequent uranium loading and transportation. By checking transportation tools and personnel qualifications, monitoring data such as position, pressure and radiation in real time in the transportation process, detecting and feeding back the data by using a safety sensor, and adjusting a transportation strategy according to road conditions, congestion degrees and the like, full-chain radioactive safe transportation after natural uranium barrels are filled with uranium is realized. Through obtaining the used natural uranium barrels approved by the supervision department, performing classified storage, performing regular inspection and maintenance, and recording and archiving related information, the subsequent use safety of the natural uranium barrels is ensured, and the whole-process intelligent management of the natural uranium barrels is realized.

The invention discloses a natural uranium barrel logistics storage data transmission system and method based on the Internet of Things, and relates to the technical field of the Internet of Things. According to the natural uranium barrel storage data, abnormal state judgment and abnormal screening processing are carried out on all the natural uranium barrels, and real-time storage state evaluation is carried out on the processed natural uranium barrels; constructing a space storage model by combining the storage space data of the storage area to which the corresponding natural uranium barrel belongs, and performing real-time storage space state evaluation analysis on the storage space data of each storage area according to the space storage model; according to real-time storage space state evaluation analysis data of the storage space data of each storage area, regulating and controlling the storage space data of each storage area, and marking a natural uranium barrel ex-warehouse sequence of a corresponding storage space; according to the invention, automatic data acquisition and state supervision of the natural uranium barrels are realized, automatic analysis and flexible regulation and control are carried out on the bin position data, and the bin management efficiency and accuracy of the natural uranium barrels are improved.

The invention provides a method for preparing nuclear pure grade uranium hexafluoride, which comprises the following steps: (1) adding fluoride containing molybdenum, tungsten, vanadium, titanium, chromium and antimony and crude uranium hexafluoride of hydrogen fluoride impurities into a distillation kettle, and carrying out pressurized distillation to obtain a gaseous mixture; (2) introducing the gaseous mixture obtained in the step (1) into a calcium fluoride adsorption column, and removing hydrogen fluoride in the mixture through selective adsorption of calcium fluoride; and (3) carrying out single-tower pressurized distillation on the gaseous mixture treated in the step (2) to obtain nuclear pure grade uranium hexafluoride. The method solves the problems of low uranium hexafluoride purity, high energy consumption and high cost of the existing uranium purification conversion technology in the conversion technology of the high-impurity-content natural uranium concentrate, realizes cost reduction and efficiency improvement of uranium hexafluoride purification on the premise of ensuring that uranium hexafluoride reaches the nuclear purity grade standard, and has a wide application prospect. Rapid popularization of a dry uranium purification and conversion process is boosted, and the technical level of uranium purification and conversion in China is further improved.

A method for separating hydrogenated kerosene and TBP in a natural uranium extractant includes the following steps: First, at room temperature, take 20 mL of the uranium-containing mixed organic solvent to be treated and mix it thoroughly with 11–14.5 mol / L analytical grade phosphoric acid at a volume ratio of 1:1–1:2 for 5–10 min, with 1–5 separation stages, and allow the reaction to stand at 20–30°C. After standing, take the lower liquid phase, which is an H3PO4·nTBP solution, and the upper liquid phase is hydrogenated kerosene. At this point, the hydrogenated kerosene content in the upper liquid after separation can reach over 97%. Second, add 2–3 mol / L nitric acid aqueous solution to the obtained H3PO4·nTBP solution, with a two-phase flow ratio of 1:1–1:2 and 2–3 separation stages, allowing the reaction to stand at 20–30°C. Take the supernatant, which is the TBP product liquid, thus achieving separation. Third, prepare an extractant using the separated TBP and hydrogenated kerosene, and conduct a comparative experiment with fresh extractant.

The application discloses a kind of natural uranium supply to the evaluation method and equipment of long-term guarantee degree in nuclear power, belong to mineral resources guarantee technical field.The method takes primary uranium source and secondary uranium source joint supply as core analysis dimension, while giving consideration to quantity and quality, establishes evaluation index system, realizes the comprehensive quantitative analysis and prediction of the guarantee degree of natural uranium resources needed for nuclear power development by standardization evaluation process;The standardization evaluation process includes two evaluation processes of medium-term evaluation and long-term evaluation;The medium-term evaluation priority evaluation is the guarantee capacity of producing mine, and the long-term evaluation is based on the results of the medium-term evaluation Comprehensive evaluation is carried out by combining planned mine and potential mine.The present application can realize the quantitative evaluation of natural uranium supply guarantee for nuclear power, with high accuracy and strong operability.

The application provides a regeneration method of natural uranium extractant. In the regeneration method of the natural uranium extractant, the natural uranium extractant comprises tributyl phosphate and hydrogenated kerosene, and the regeneration method comprises the following steps which are sequentially performed: S1: washing the natural uranium extractant to be regenerated by using a sodium hydroxide solution, and then acidizing by using a nitric acid solution; S2: washing the natural uranium extractant after the washing and acidizing in step S1 by using a sodium carbonate solution, and then acidizing by using a nitric acid solution to obtain the regenerated natural uranium extractant. The regenerated natural uranium extractant obtained by the regeneration method has good selectivity and stability, and the reuse of the natural uranium extractant is realized.