CN1028311C - Melting pollution removing method for polluted metal by uranium - Google Patents
Melting pollution removing method for polluted metal by uranium Download PDFInfo
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- CN1028311C CN1028311C CN 92100288 CN92100288A CN1028311C CN 1028311 C CN1028311 C CN 1028311C CN 92100288 CN92100288 CN 92100288 CN 92100288 A CN92100288 A CN 92100288A CN 1028311 C CN1028311 C CN 1028311C
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- melting
- metal
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- uranium
- pollution
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Abstract
The present invention relates to a melting pollution removing method for polluted metal by uranium, which belongs to the technical field of radioactive pollution removal and volume reduction. The method can be applied to radioactive polluted metal at the aspects of the pollution removal, treatment, disposal, environmental protection, etc. The technical scheme of the present invention is characterized in that an industrial frequency inductive furnace is used as melting equipment for pulverizing the polluted metal to be melted into small blocks; after being mixed with a fluxing agent, the small blocks are loaded in a melting furnace together with the fluxing agent; the melting furnace is electrified and heated so that the temperature is higher than that of the melting point of the metal to be melted by 200 to 300 DEG C for realizing the purposes of melting and the pollution removal.
Description
The invention belongs to radioactive decontamination and subtract the appearance technical field, be specifically related to a kind of melting pollution removing method for polluted metal by uranium.
The decontamination of radioactive pollution metal and recycling scrap metal are the major issues that an existing obvious economic benefit has considerable social benefit again.Carry out the research of this respect, and achievement in research is used for national economy establishes, not only can save a large amount of starting material, simultaneously to environmental protection, the offspring that benefits future generations has important meaning.Carry out the work of this respect at present, concentrate on nuclear power station and other DECOMMISSIONING OF NUCLEAR FACILITIES aspects mostly.The EC countries has carried out years of researches in this respect, around by the scrap iron and steel decontamination and the recovery of neutron activation product pollution, does not pollute but do not relate to uranium basically.The U.S. once had the people that the melting decontamination of uranium pollution metal was carried out research, and had drawn experimental result, recommended out pyrex or alkaline oxygenated slag agent as the melting flux.In uranium pollution metal melting decontamination technical field, its denomination of invention is the Jap.P. JP61-45999 of " radioactive contamination aluminium method of smelting ", and used flux is slagging agent powder, for example LiF-KCl-BaCl
2This slagging agent will be prepared in advance by a certain percentage, and the cost height, has increased the difficulty and the complicacy of melting decontamination technology, gives to apply and brings difficulty.
The object of the present invention is to provide a kind of use trade refuse to make melting decontamination flux and the simple decontamination method of technological process, make uranium pollution metal melting decontamination convenient, feasible, cost is low.
Concrete technical scheme of the present invention is: adopt the steelworks blast-furnace slag to make the melting flux, select for use power frequency induction furnace as smelting equipment, make furnace lining with silica sand or bauxite.Fusion process carries out like this: at first the steel that is polluted by uranium, useless equipment or parts that nickel or copper become are broken into the fritter of easily putting into smelting furnace, are the smelting furnace of packing into together after blast-furnace slag fragment that gold metallurgy fusion belongs to weight 3-7% mixes with weight; Then to smelting equipment energising heating, and smelting temperature is transferred to belong to fusing point and exceeds 200-300 ℃ than gold metallurgy fusion, treat Metal Melting after half an hour get final product ingot casting, so far finish the overall process of uranium pollution metal melting decontamination.
The present invention has three kinds of pair steel, copper, nickel to be carried out the example of actual melting decontamination by the uranium pollution metal, and concrete condition sees Table 1.
The melting decontamination result of the steel that table 1 uranium pollutes, nickel, copper fitting
Original level of pollution ingot uranium content decontamination factor
Metal
（ppm） （ppm） （FD）
Copper 2 do not detect＞and 2
298 do not detect＞3 * 10
2
Nickel
3111 do not detect＞3 * 10
3
6 do not detect＞10
Steel 25 do not detect＞and 30
152 do not detect＞1.5 * 10
2
The present invention has obvious good effect. The most outstanding at first is to utilize industrial waste to make the melting flux, both convenient, again free of charge, has also realized the treatment of wastes with processes of wastes against one another; Secondly, the present invention treats smelting metal the no preliminary treatment requirement in surface in technology, and it is pretreated to give surface contamination to old metal with producing, also is for environmental protection with to the consideration of staff's health; The 3rd, clean effect is good, after the melting in the ingot uranium content be lower than AAS detect limit value (＜1ppm), the metal recovery rate height can reach more than 96%; The 4th, fusion process, uranium compound from motlten metal and slag the escaped quantity in the environment less than containing 100,000 of total uranium amount/(1/10 in the smelting metal5); The 5th, the uranium pollutant is evenly distributed in slag, and the water insoluble and diluted acid except hydrofluoric acid of slag can directly carry out the final processing of radwaste through suitable packing.
Claims (1)
1, a kind of melting pollution removing method for polluted metal by uranium, with power frequency induction furnace as smelting equipment, pollution metal fusion is broken into fritter, and mix with flux, the smelting furnace of packing into together, energising is heated to uniform temperature and carries out melting, used flux is the steelworks blast-furnace slag, the invention is characterized in, the furnace lining of power frequency induction furnace is silica sand or bauxite, the slag consumption is the 3-7% that gold metallurgy fusion belongs to weight, and the furnace heats temperature need transfer to and belong to fusing point than gold metallurgy fusion and exceed 200-300 ℃, and treats behind the metal melting ingot casting half an hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92100288 CN1028311C (en) | 1992-01-22 | 1992-01-22 | Melting pollution removing method for polluted metal by uranium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92100288 CN1028311C (en) | 1992-01-22 | 1992-01-22 | Melting pollution removing method for polluted metal by uranium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1074778A CN1074778A (en) | 1993-07-28 |
| CN1028311C true CN1028311C (en) | 1995-04-26 |
Family
ID=4938484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92100288 Expired - Fee Related CN1028311C (en) | 1992-01-22 | 1992-01-22 | Melting pollution removing method for polluted metal by uranium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1028311C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103805750A (en) * | 2012-11-08 | 2014-05-21 | 中国辐射防护研究院 | Fluxing agent used for smelting decontamination of uranium-contaminated carbon steel or stainless steel |
| CN103811091B (en) * | 2012-11-08 | 2016-10-12 | 中国辐射防护研究院 | High level uranium pollutes carbon steel or stainless steel melting decontamination technique |
| CN107785090B (en) * | 2017-09-22 | 2020-08-21 | 中核兰州铀浓缩有限公司 | Device and method for removing uranium hexafluoride dirt of measurement sensor |
| CN113957259B (en) * | 2021-10-25 | 2024-02-02 | 湖南核工业宏华机械有限公司 | Radioactive pollution waste metal smelting detergent |
| CN115161432A (en) * | 2022-08-09 | 2022-10-11 | 湖南核工业宏华机械有限公司 | Waste metal smelting detergent with artificial nuclide radioactive pollution |
-
1992
- 1992-01-22 CN CN 92100288 patent/CN1028311C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1074778A (en) | 1993-07-28 |
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| CF01 | Termination of patent right due to non-payment of annual fee |