SE447125B - WAY TO IMPROVE THE Separation of the Liquid and Solid Phases Following Sulfuric Acid Attacks on Uranium Ore - Google Patents
WAY TO IMPROVE THE Separation of the Liquid and Solid Phases Following Sulfuric Acid Attacks on Uranium OreInfo
- Publication number
- SE447125B SE447125B SE8009174A SE8009174A SE447125B SE 447125 B SE447125 B SE 447125B SE 8009174 A SE8009174 A SE 8009174A SE 8009174 A SE8009174 A SE 8009174A SE 447125 B SE447125 B SE 447125B
- Authority
- SE
- Sweden
- Prior art keywords
- ore
- separation
- uranium
- sulfuric acid
- liquid
- Prior art date
Links
- 229910052770 Uranium Inorganic materials 0.000 title claims description 14
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims description 14
- 238000000926 separation method Methods 0.000 title claims description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims description 12
- 239000007791 liquid phase Substances 0.000 title claims description 6
- 239000007790 solid phase Substances 0.000 title claims description 5
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 3
- 239000007900 aqueous suspension Substances 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 235000012204 lemonade/lime carbonate Nutrition 0.000 claims description 2
- 239000000725 suspension Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000010306 acid treatment Methods 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 239000004063 acid-resistant material Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B60/00—Obtaining metals of atomic number 87 or higher, i.e. radioactive metals
- C22B60/02—Obtaining thorium, uranium, or other actinides
- C22B60/0204—Obtaining thorium, uranium, or other actinides obtaining uranium
- C22B60/0217—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes
- C22B60/0252—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes treatment or purification of solutions or of liquors or of slurries
- C22B60/0278—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes treatment or purification of solutions or of liquors or of slurries by chemical methods
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B60/00—Obtaining metals of atomic number 87 or higher, i.e. radioactive metals
- C22B60/02—Obtaining thorium, uranium, or other actinides
- C22B60/0204—Obtaining thorium, uranium, or other actinides obtaining uranium
- C22B60/0217—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes
- C22B60/0221—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes by leaching
- C22B60/0226—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes by leaching using acidic solutions or liquors
- C22B60/0234—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes by leaching using acidic solutions or liquors sulfurated ion as active agent
Landscapes
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Description
447 125 2 skall erhållas. Trots alla försök att förbättra separationen av mediet har slutligen det syrafasta materialet en avsevärd förmåga att kvarhålla tvättlösningen. 447 125 2 shall be obtained. Finally, despite all attempts to improve the separation of the medium, the acid-resistant material has a considerable ability to retain the washing solution.
På basis av de ovan nämnda nackdelarna och under fortsatt forskning inom detta område har man nu funnit ochlutarbetet ett för- finande scm.¶m:det möjligt att avsevärt förbättra separeringen av de fasta och flytande faserna i en suspension härrörande från an- grepp av en svavelsyrahaltig lösning på en uranförande malm.On the basis of the above-mentioned disadvantages and during further research in this field, it has now been found and elaborated that it is possible to significantly improve the separation of the solid and liquid phases in a suspension resulting from attack by a sulfuric acid-containing solution on a uranium-bearing ore.
Sättet enligt uppfinningen, vilket gör det möjligt att avse- värt förbättra separeringen av de fasta och flytande faserna i en vattensuspension härrörande från ett svavelsyraangrepp på en uran- förande malm, innebär att kalciumsulfat-dihydrat sättes till det an- gripande mediet på samma gång som den uranförande malmen. Överraskande har det nu vid laboratorieförsök, utförda för att utröna orsaken till de ovannämnda separeringssvårigheterna, visat sig att tillsats av till och med endast en liten kvantitet kalciumsulfat-dihydrat innan det angripande medlet och malmen till- sättes, leder till en avsevärd förbättring av den efterföljande separeringen av den fasta och den flytande fasen i suspensionen härrörande från syraangreppet, vilken suspension ej'längre har den viskösa form som den uppvisade när syraangreppet skedde utan till- sats av kalciumsulfat-dihydrat.The method according to the invention, which makes it possible to significantly improve the separation of the solid and liquid phases in an aqueous suspension resulting from a sulfuric acid attack on a uranium ore, means that calcium sulphate dihydrate is added to the attacking medium at the same time as the uranium-bearing ore. Surprisingly, in laboratory tests performed to determine the cause of the above-mentioned separation difficulties, it has now been found that the addition of even a small quantity of calcium sulphate dihydrate before the infiltrating agent and ore is added, leads to a considerable improvement of the subsequent the separation of the solid and the liquid phase of the suspension resulting from the acid attack, which suspension no longer has the viscous form which it showed when the acid attack took place without the addition of calcium sulphate dihydrate.
Den kvantitet kalciumsulfat-dihydrat som sättes till det an- gripande mediet kan vara mycket liten, och man har konstaterat att en tillsats av minst 10 kg kalciumsulfat-dihydrat per ton malm som skall utsättas för syraangrepp ger mycket fördelaktiga separerings- resultat, vilket innebär en avsevärt minskad förbrukning av flocku- lationsmedel, en-utomordentligt förbättrad separeringsgrad för de fasta och flytande faserna och en avsevärt minskad mängd impregne-' ringslösning som kvarhålles av det syrafasta materialet, varigenom det blir möjligt att minska den kvantitet tvättlösning som erfordras för att uppnå ett ökat utbyte av solubiliserat uran.The quantity of calcium sulphate dihydrate added to the attack medium can be very small, and it has been found that the addition of at least 10 kg of calcium sulphate dihydrate per tonne of ore to be subjected to acid attack gives very advantageous separation results, which means a significantly reduced consumption of flocculants, an extremely improved degree of separation for the solid and liquid phases and a considerably reduced amount of impregnation solution retained by the acid-resistant material, thereby making it possible to reduce the quantity of washing solution required to achieve a increased yield of solubilized uranium.
Kalciumsulfat-dihydratet som sättes till det angripande medie1 kan vara av naturligt ursprung eller syntetiskt. Det är emellertid möjligt, då det gäller en fullständig uranextraktion, att till an- greppsmediet återföra kalciumsulfat-dihydrat som t ex härrör från utloppsvätskor, vilka befriats från uran och behandlats med kalk eller kalciumkarbonat, eller eventuellt bildat sedan det kontinuer- liga angreppet på malmen påbörjats, genom att en fraktion av det syrafasta materialet, innehållande tidigare bildat kalciumsulfat- s 447 125 dihydrat, återföres. iättet enligt uppfinningen kan tillämpas på varje förfarande som innebär svavelsyrabehandling av uranförande malm i en mer el- ler mindre tjock suspension, i närvaro av oxidationsmedel för uran om så erfordras.The calcium sulfate dihydrate added to the attacking medium1 may be of natural origin or synthetic. However, in the case of a complete uranium extraction, it is possible to return to the attack medium calcium sulphate dihydrate which, for example, originates from effluent liquids which have been liberated from uranium and treated with lime or calcium carbonate, or possibly formed after the continuous attack on the ore. started by recycling a fraction of the acid-resistant material, containing previously formed calcium sulfate 447,125 dihydrate. The method according to the invention can be applied to any process which involves sulfuric acid treatment of uranium-bearing ore in a more or less thick suspension, in the presence of oxidizing agents for uranium if required.
Temperaturbetingelserna är ej kritiska vid tillämpning av sättet enligt uppfinningen. Generellt är temperaturen mellan 40 och 9o°c.The temperature conditions are not critical in the application of the method according to the invention. Generally the temperature is between 40 and 90 ° C.
Exemgel 1 Vid ett första försök, avseende tidigare teknik, infördes 0,1 ton uranförande malm, krossad till en dimension mindre än 0,7 mm och med nedanstående sammansättning, i en reaktor för syra- behandling: U3O8 0,19% V205 0,83% Ca 4,98% olika material 94,00% Detta material utsattes för angrepp av 109 liter svavelsyra- haltig vätska innehållande 100 g/l HZSO4 underM24 timmar vid en temperatur av 80°C i närvaro av 2 kg NaClO3 såsom oxidationsmedel och under omröring.Example gel 1 In a first prior art experiment, 0.1 ton of uranium ore, crushed to a dimension less than 0.7 mm and having the following composition, was introduced into an acid treatment reactor: U3O8 0.19% V205 0, 83% Approx. 4.98% various materials 94.00% This material was subjected to the application of 109 liters of sulfuric acid-containing liquid containing 100 g / l H 2 SO 4 for 24 hours at a temperature of 80 ° C in the presence of 2 kg of NaClO 3 as oxidizing agent and under stirring.
Den efter syrabehandlingen erhållna suspensionen var viskös och utsattes för ett separationssteg. för att åstadkomma separeringen måste 480 g/ton malm av ett välkänt flockulationsmedel, rlocal T214, tillsättas för att möjlig- göra en filtrerinçshastighet av 0,69 ton/m2/h.The suspension obtained after the acid treatment was viscous and subjected to a separation step. To achieve the separation, 480 g / ton of ore of a well-known flocculant, rlocal T214, must be added to enable a filtration rate of 0.69 ton / m2 / h.
Det erhållna utbytet av solubiliserat uran var 98,4%, medan volymen lösning för tvättning av det syrafasta materialet var 1,2 m3 (lösning av HZSO4 innehållande 2 g/IL och fukthalten hos den resulterande kakan, bestående av nämnda material, var 40%.The yield of solubilized uranium obtained was 98.4%, while the volume of solution for washing the acid-solids was 1.2 m 3 (solution of H 2 SO 4 containing 2 g / IL and the moisture content of the resulting cake, consisting of said material, was 40% .
Vid ett annat försök, utfört med användning av 0,1 ton av samma malm och i enlighet med sättet enligt uppfinningen, tillsat- tes 20 kg Ca: 4.2H2O per ton behandlad malm samtidigt med malmen och vid sanna försöksbetingelser som tidigare.In another experiment, carried out using 0.1 ton of the same ore and in accordance with the method according to the invention, 20 kg of Ca: 4.2H 2 O per ton of treated ore were added at the same time as the ore and under true experimental conditions as before.
Den efter syrabehandlingen av malmen erhållna suspensionen var ej viskös, och den utsattes för ett separationssteg, varvid det ovan nämnda flockulationsmedlet tillsattes i en kvantitet av 60 9 per ton behandlad malm. 447 125 4 Den erhållna filtreringshastigheten var 1,1 ton/m2/h. Utbytet av solubiliserat uran var 99,8%, medan volymen lösning för tvätt- ning av det syrafasta materialet var 0,9 m3, och fukthalten hos den resulterande kakan, bestående av nämnda material, var ej högre än ”.The suspension obtained after the acid treatment of the ore was not viscous, and it was subjected to a separation step, the above-mentioned flocculant being added in a quantity of 609 per tonne of treated ore. 447 125 4 The filtration rate obtained was 1.1 tons / m2 / h. The yield of solubilized uranium was 99.8%, while the volume of solution for washing the acid-proof material was 0.9 m3, and the moisture content of the resulting cake, consisting of said material, was not higher than ”.
Exemgel 2 I detta exempel användes samma malm och samma förfarande vid syraangreppet som i exempel 1.Example Gel 2 In this example, the same ore and the same procedure were used in the acid attack as in Example 1.
Kalciumsulfat-dihydratet, som samtidigt med malmen sattes till det angripande mediet, anskaffades genom utfällning med kalk av SO =-joner som förekom i den från uran befriade utloppsvätska som vår avsedd att gå till avlopp.The calcium sulphate dihydrate, which was added to the attacking medium at the same time as the ore, was obtained by precipitating with lime SO 3 ions present in the uranium-free effluent as our intended for drainage.
Kvantiteten kalciumsulfat-dihydrat som sattes till reaktions- mediet var 30 kg fuktig produkt per ton malm som skulle behandlas.The quantity of calcium sulphate dihydrate added to the reaction medium was 30 kg of moist product per tonne of ore to be treated.
Den efter syrabehandlíngen erhållna suspensionen var ej viskös, och den utsattes för ett separationssteg, varvid det i exempel 1 använda flockulationsmedlet tillsattes i en mängd av 70 g per ton behandlad malm.The suspension obtained after the acid treatment was not viscous, and it was subjected to a separation step, the flocculant used in Example 1 being added in an amount of 70 g per tonne of treated ore.
Den erhållna fíltreringshastigheten var 1,05 ton/m2/h.The filtration rate obtained was 1.05 tons / m2 / h.
Det erhållna utbytet av solubiliserat uran var 99,7%, medan volymen lösning för tvättning av syrafast material var 1 m3, och fukthalten hos den resulterande kakan, bestående av nämnda material, var ej högre än 25%.The yield obtained of solubilized uranium was 99.7%, while the volume of solution for washing acid-solids was 1 m 3, and the moisture content of the resulting cake, consisting of said material, was not higher than 25%.
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8000656A FR2473063A1 (en) | 1980-01-07 | 1980-01-07 | Sepn. of liq. and solid phases after leaching uranium ore - where gypsum is added to hot sulphuric acid leaching soln. to aid filtration and increase uranium yield in filtrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE8009174L SE8009174L (en) | 1981-07-08 |
| SE447125B true SE447125B (en) | 1986-10-27 |
Family
ID=9237479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8009174A SE447125B (en) | 1980-01-07 | 1980-12-30 | WAY TO IMPROVE THE Separation of the Liquid and Solid Phases Following Sulfuric Acid Attacks on Uranium Ore |
Country Status (11)
| Country | Link |
|---|---|
| AU (1) | AU542601B2 (en) |
| BR (1) | BR8100032A (en) |
| CA (1) | CA1150059A (en) |
| ES (1) | ES8301285A1 (en) |
| FR (1) | FR2473063A1 (en) |
| IT (1) | IT1141158B (en) |
| MA (1) | MA19036A1 (en) |
| OA (1) | OA06714A (en) |
| SE (1) | SE447125B (en) |
| YU (1) | YU41226B (en) |
| ZA (1) | ZA8141B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB928889A (en) * | 1958-08-14 | 1963-06-19 | Commissariat Energie Atomique | Method of processing uranium ore |
| FR1294195A (en) * | 1961-04-10 | 1962-05-26 | Commissariat Energie Atomique | Improvements in uranium ore treatment processes |
| FR1564824A (en) * | 1968-03-08 | 1969-04-25 | ||
| FR2343696A1 (en) * | 1976-03-09 | 1977-10-07 | Nat Petrochemical Cy Npc | Phosphoric acid prepn. from phosphate ore slurries - by digestion with dilute phosphoric acid and removal of calcium by adding oxalic acid |
| BE842701A (en) * | 1976-06-08 | 1976-10-01 | IMPROVED SOLID-LIQUID SEPARATION PROCESS IN WET MINERAL EXTRACTION | |
| CA1105264A (en) * | 1977-07-05 | 1981-07-21 | Verner B. Sefton | Hydrometallurgical process for the treatment of ores |
-
1980
- 1980-01-07 FR FR8000656A patent/FR2473063A1/en active Granted
- 1980-12-30 IT IT26995/80A patent/IT1141158B/en active
- 1980-12-30 SE SE8009174A patent/SE447125B/en not_active IP Right Cessation
- 1980-12-30 YU YU3325/80A patent/YU41226B/en unknown
-
1981
- 1981-01-02 ES ES498289A patent/ES8301285A1/en not_active Expired
- 1981-01-05 ZA ZA00810041A patent/ZA8141B/en unknown
- 1981-01-05 AU AU65965/81A patent/AU542601B2/en not_active Ceased
- 1981-01-06 MA MA19237A patent/MA19036A1/en unknown
- 1981-01-06 BR BR8100032A patent/BR8100032A/en unknown
- 1981-01-06 OA OA57290A patent/OA06714A/en unknown
- 1981-01-06 CA CA000367942A patent/CA1150059A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| OA06714A (en) | 1982-06-30 |
| IT1141158B (en) | 1986-10-01 |
| CA1150059A (en) | 1983-07-19 |
| YU41226B (en) | 1986-12-31 |
| FR2473063B1 (en) | 1981-12-18 |
| AU6596581A (en) | 1981-07-16 |
| YU332580A (en) | 1983-02-28 |
| IT8026995A0 (en) | 1980-12-30 |
| SE8009174L (en) | 1981-07-08 |
| ES498289A0 (en) | 1982-11-16 |
| BR8100032A (en) | 1981-07-21 |
| AU542601B2 (en) | 1985-02-28 |
| MA19036A1 (en) | 1981-10-01 |
| ZA8141B (en) | 1982-01-27 |
| ES8301285A1 (en) | 1982-11-16 |
| FR2473063A1 (en) | 1981-07-10 |
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| NUG | Patent has lapsed |
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