KR840002740A - 포스포집섬중의 방사능 오염환원공정 - Google Patents
포스포집섬중의 방사능 오염환원공정 Download PDFInfo
- Publication number
- KR840002740A KR840002740A KR1019820005634A KR820005634A KR840002740A KR 840002740 A KR840002740 A KR 840002740A KR 1019820005634 A KR1019820005634 A KR 1019820005634A KR 820005634 A KR820005634 A KR 820005634A KR 840002740 A KR840002740 A KR 840002740A
- Authority
- KR
- South Korea
- Prior art keywords
- gypsum
- zone
- particle size
- anhydrous gypsum
- recovered
- Prior art date
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title 1
- 229910052698 phosphorus Inorganic materials 0.000 title 1
- 239000011574 phosphorus Substances 0.000 title 1
- 238000003904 radioactive pollution Methods 0.000 title 1
- 238000011946 reduction process Methods 0.000 title 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 229910052602 gypsum Inorganic materials 0.000 claims 15
- 239000010440 gypsum Substances 0.000 claims 15
- 239000002245 particle Substances 0.000 claims 10
- 230000002285 radioactive effect Effects 0.000 claims 10
- 239000000356 contaminant Substances 0.000 claims 7
- 238000000926 separation method Methods 0.000 claims 7
- 239000002002 slurry Substances 0.000 claims 6
- 239000013078 crystal Substances 0.000 claims 4
- 230000018044 dehydration Effects 0.000 claims 4
- 238000006297 dehydration reaction Methods 0.000 claims 4
- 229910019142 PO4 Inorganic materials 0.000 claims 2
- 239000010452 phosphate Substances 0.000 claims 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims 2
- 239000007787 solid Substances 0.000 claims 2
- 229910052925 anhydrite Inorganic materials 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 claims 1
- 231100000719 pollutant Toxicity 0.000 claims 1
- 239000012857 radioactive material Substances 0.000 claims 1
- 238000004064 recycling Methods 0.000 claims 1
- 239000010802 sludge Substances 0.000 claims 1
- 239000002699 waste material Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/228—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen one form of calcium sulfate being formed and then converted to another form
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/228—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen one form of calcium sulfate being formed and then converted to another form
- C01B25/2285—Dihydrate-anhydrite or hemihydrate-anhydrite process
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/468—Purification of calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Anti-Oxidant Or Stabilizer Compositions (AREA)
Abstract
내용 없음.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도 황산농도와 온도에 따른 황산칼슘의 수화상태를 나타내는 상평형도,
제2도 본 발명의 일실시를 나타내는 공정도.
Claims (17)
- 포스포집섬을 방사능 오염물을 포함하는 황산칼슘 무수석고로 탈수화시키고 이어 방사능이 없는 집섬종자결정의 존재하에서 충분한 양의 무수석고를 재수화시켜 입자크기가 무수석고보다 크고 근본적으로 방사능이 없는 집섬을 생성한 다음 큰 입자크기의 집섬을 방사능 오염물을 포함하는 무수석고로부터 분리하는 것을 특징으로 하는, 방사능 오염물을 포함하는 포스포집섬 폐기산물중의 방사능을 환원제거하는 공정.
- 약 5-70wt%의 무수석고가 재수화되지 않고 남게되는, 주장 1의 공정.
- 약 10-30wt%의 무수석고가 재수화되지 않고 남게되는, 주장 1의 공정.
- 섬포스포집이 약 1-25마이크로미터 입자크기로 탈수화되고, 그로부터의 일부분이 약 3C-100마이크로부미터 입자크기의 집섬으로 재수화되는, 주장 1의 공정.
- 다음 단계를 포함하여, 포스포집섬 폐기산물중의 방사능 오염물을 환원제거하는 공정. a) 방사능오염물을 포함하는 포스포집섬, 물 및 황산을 탈수화지대에 공급하고 그들을 혼합하여 1차 슬러리를 형성(여기서 공급량은 약 70-140℃에서 슬러리가 약 10-60wt%의 총고제함량과 약 50 -70wt%의 황산함량을 갖도록 제공됨)하고, b) 탈수화지대로부터 무수석고 슬러리를 회수하여 1차 분리지대를 통과시켜 황산과 무수석고를 분리하여 황산 및 방사능오염물질포함 무수석고를 각각 1차 분리지대로부터 회수하고, c) 상기에서 회수된 무수석고, 가속제 및 집섬종자결정을 재수화지대에 공급혼합하여 2차 슬러리를 형성(여기서 공급랑은 2차 슬러리가 약 1-20wt%의 가수제를 포함함하며 집섬과 무수석고의 비율은 악 10:90 내지 90:10정도가 되도록 제공됨)하여 충분한 양의 무수석고를 집섬으로 전환시킨 후, d) 2차 슬러리를 2차 분리지대를 통과시켜 미전환 무수석고와 집섬을 분리하여 방사능물질을 포함하고 있는 무수석고와 근본적으로 방사능 오염물이 없는 집섬생성물을 각각 회수함.
- 2차 분리지대로부타 방사능 오염물이 거의 없는 집섬생성물을 회수하여 이것을 재수화지대에 재순환시킴을 특징으로 하는, 주장 5의 공정.
- 약 70wt%의 무수석고가 재수화지대내에서 집섬으로 재수화되지 않은채 잔류하여 2차 분리지대로부터 회수처분됨을 특징으로 하는, 주장 5의 공정.
- 약 60wt%의 황산이 탈수화지대에 공급되고 약 50wt%의 황산이 1차 분리지대로부터 회수됨을 특징으로 하는, 주장 5의 공정.
- 탈수화지대내에서 슬러러의 총고제량이 약 30-50wt%인, 주장 5의 공정,
- 1차 분리지대를 통과하는 무수석고가 약 1-25마이크로미터의 입자크기를 갖는, 주장 5의 공정.
- 무수석고의 입자크기가 약 5-15마이크로미터인, 주장 10의 공정.
- 재수화지대에 공급되는 집섬종자결정의 입자크기가 약 30-100마이크로미터인, 주장 5의 공정.
- 2차 분리지대로부터 분리회수된, 거의 방사능 오염물이 없는 집섬의 입자크기가 약 30-60마이크로미터인, 주장 5의 공정.
- 수화되지 않고 잔류하는 무수석고결정의 입자크기가 약 5-25마이크로미터인, 주장 5의 공정.
- 약 10-90%의 집섬이 재수화지대로 재순환되는, 주장 6의 공정.
- 약 50-75%의 집섬이 재순환되는, 주장 15의 공정.
- 회수집섬을 최소한 두가지의 입자크기분류로 분리하여 그중 큰 입자크기의 집섬생성물을 회수하고, 작은 입자크기의 것은 재순환시킴을 특징으로 하는, 주장 6의 공정.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US330550 | 1981-12-14 | ||
| US06/330,550 US4388292A (en) | 1981-12-14 | 1981-12-14 | Process for reducing radioactive contamination in phosphogypsum |
| US330,550 | 1981-12-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR840002740A true KR840002740A (ko) | 1984-07-16 |
| KR870000144B1 KR870000144B1 (ko) | 1987-02-12 |
Family
ID=23290260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR8205634A KR870000144B1 (ko) | 1981-12-14 | 1982-12-14 | 포스포집섬중의 방사능 오염환원공정 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4388292A (ko) |
| EP (1) | EP0096718B1 (ko) |
| KR (1) | KR870000144B1 (ko) |
| AU (1) | AU567669B2 (ko) |
| DE (1) | DE3279532D1 (ko) |
| WO (1) | WO1983002111A1 (ko) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4424196A (en) * | 1982-06-29 | 1984-01-03 | United States Gypsum Company | Phosphohemihydrate process for purification of gypsum |
| US4689178A (en) * | 1985-11-14 | 1987-08-25 | Rockwell International Corporation | Method for magnesium sulfate recovery |
| NL8601846A (nl) * | 1986-07-15 | 1988-02-01 | Stamicarbon | Werkwijze voor het verwijderen van zware metalen uit zure fosfaathoudende waterige media. |
| AU2002249752B2 (en) * | 2000-10-05 | 2007-05-17 | Pcs Nitrogen Fertilizer, L.P. | Gypsum decontamination process |
| US7585485B2 (en) | 2006-07-03 | 2009-09-08 | Tripoliven, C.A. | Process for the physiochemical conditioning of chemical gypsum or phospho-gypsum for use in formulation for cement and other construction materials |
| KR100949671B1 (ko) * | 2008-07-22 | 2010-03-29 | 한국원자력연구원 | 인석고 중 라듐핵종의 제염처리 방법 |
| CN104529206B (zh) * | 2014-12-28 | 2016-06-22 | 北京工业大学 | 一种基于脱硫石膏制备自组装片状无水石膏的方法 |
| CN105645454B (zh) * | 2016-01-04 | 2017-08-08 | 西南科技大学 | 一种柱状半水石膏的制备及滤液处理方法 |
| DE102020100254A1 (de) | 2020-01-08 | 2021-07-08 | Thyssenkrupp Ag | Integriertes Verfahren zur Herstellung eines Baustoffs aus Phosphorgips |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2006342A (en) * | 1934-05-18 | 1935-07-02 | Krebs Pigment & Color Corp | Process of making anhydrite |
| US2151331A (en) * | 1935-07-05 | 1939-03-21 | Du Pont | Process for making insoluble anhydrite |
| GB577970A (en) * | 1938-12-29 | 1946-06-11 | Paul Kubelka | Improvements relating to the purification of calcium sulphate |
| US2531977A (en) * | 1948-01-22 | 1950-11-28 | Allied Chem & Dye Corp | Process for manufacture of phosphoric acid |
| US2956859A (en) * | 1957-12-26 | 1960-10-18 | Nat Lead Co | Preparation of anhydrite |
| IL23004A (en) * | 1964-02-27 | 1969-03-27 | Fosindus Co | Process for the purification of residual gypsum produced in the manufacture of phosphoric acid by the reaction of sulphuric acid with natural phosphates |
| US3574648A (en) * | 1967-12-18 | 1971-04-13 | Knauf Westdeutsche Gips | Method for the production of synthetic calcium sulfate hemihydrate |
| DE1904496A1 (de) * | 1969-01-30 | 1970-08-06 | Giulini Gmbh Geb | Verfahren zur Herstellung von Calciumsulfat-Halbhydrat aus verunreinigten Gipsen,insbesondere Phosphorsaeure-Abfallgips |
| FR2128140B1 (ko) * | 1971-03-05 | 1976-04-16 | Alsthom Cgee | |
| DE2218382C3 (de) * | 1972-04-15 | 1975-08-21 | Gebrueder Giulini Gmbh, 6700 Ludwigshafen | Verfahren zur Herstellung von reinem Calciumsulfat beim Phosphorsäurenaßaufschluß |
| DE2219223A1 (de) * | 1972-04-20 | 1973-10-25 | Fels Werke Peine Salzgitter | Verfahren zur aufbereitung von synthese-rohgips |
| GB1394734A (en) * | 1972-04-26 | 1975-05-21 | Unie Van Kunstmestfab Bv | Process for the purification of waste product calcium sulphate |
| GB1429187A (en) * | 1972-05-11 | 1976-03-24 | Bpb Industries Ltd | Process for the conversion of anhydrite into gypsum |
| FR2201682A5 (ko) * | 1972-10-02 | 1974-04-26 | Cerphos | |
| US4146568A (en) * | 1977-08-01 | 1979-03-27 | Olin Corporation | Process for reducing radioactive contamination in waste product gypsum |
| US4311677A (en) * | 1979-12-03 | 1982-01-19 | Swiss Aluminium Ltd. | Process for producing phosphoric acid |
| US4328193A (en) * | 1980-02-27 | 1982-05-04 | Olin Corporation | Process for removing radium from monocalcium phosphate solutions by centrifugation |
| US4282192A (en) * | 1980-02-27 | 1981-08-04 | Olin Corporation | Process for producing a calcium sulfate product containing low amounts of radium |
-
1981
- 1981-12-14 US US06/330,550 patent/US4388292A/en not_active Expired - Lifetime
-
1982
- 1982-12-13 DE DE8383900379T patent/DE3279532D1/de not_active Expired
- 1982-12-13 WO PCT/US1982/001745 patent/WO1983002111A1/en active IP Right Grant
- 1982-12-13 AU AU11097/83A patent/AU567669B2/en not_active Ceased
- 1982-12-13 EP EP83900379A patent/EP0096718B1/en not_active Expired
- 1982-12-14 KR KR8205634A patent/KR870000144B1/ko active
Also Published As
| Publication number | Publication date |
|---|---|
| US4388292A (en) | 1983-06-14 |
| AU1109783A (en) | 1983-06-30 |
| WO1983002111A1 (en) | 1983-06-23 |
| EP0096718A1 (en) | 1983-12-28 |
| KR870000144B1 (ko) | 1987-02-12 |
| EP0096718A4 (en) | 1985-04-11 |
| DE3279532D1 (en) | 1989-04-20 |
| EP0096718B1 (en) | 1989-03-15 |
| AU567669B2 (en) | 1987-12-03 |
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