WO2014082461A1 - 独居石渣的分离回收方法 - Google Patents
独居石渣的分离回收方法 Download PDFInfo
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- WO2014082461A1 WO2014082461A1 PCT/CN2013/080002 CN2013080002W WO2014082461A1 WO 2014082461 A1 WO2014082461 A1 WO 2014082461A1 CN 2013080002 W CN2013080002 W CN 2013080002W WO 2014082461 A1 WO2014082461 A1 WO 2014082461A1
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- WIPO (PCT)
- Prior art keywords
- monazite
- acid
- rare earth
- thorium
- solution
- Prior art date
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- IKNAJTLCCWPIQD-UHFFFAOYSA-K cerium(3+);lanthanum(3+);neodymium(3+);oxygen(2-);phosphate Chemical compound [O-2].[La+3].[Ce+3].[Nd+3].[O-]P([O-])([O-])=O IKNAJTLCCWPIQD-UHFFFAOYSA-K 0.000 title claims 16
- 229910052590 monazite Inorganic materials 0.000 title claims 16
- 238000000034 method Methods 0.000 title claims 13
- 238000011084 recovery Methods 0.000 title claims 3
- 238000000926 separation method Methods 0.000 title claims 3
- 239000002893 slag Substances 0.000 claims 15
- 239000002253 acid Substances 0.000 claims 13
- 239000000243 solution Substances 0.000 claims 11
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 claims 8
- 229910052776 Thorium Inorganic materials 0.000 claims 8
- 229910052761 rare earth metal Inorganic materials 0.000 claims 8
- 239000006228 supernatant Substances 0.000 claims 8
- 229910052770 Uranium Inorganic materials 0.000 claims 6
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 claims 6
- 238000000605 extraction Methods 0.000 claims 5
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical group CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 claims 4
- 239000003153 chemical reaction reagent Substances 0.000 claims 4
- 239000012141 concentrate Substances 0.000 claims 4
- 238000002386 leaching Methods 0.000 claims 4
- 239000007788 liquid Substances 0.000 claims 4
- 239000002002 slurry Substances 0.000 claims 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 4
- 239000007864 aqueous solution Substances 0.000 claims 3
- 239000003350 kerosene Substances 0.000 claims 3
- 150000002910 rare earth metals Chemical class 0.000 claims 3
- LJKDOMVGKKPJBH-UHFFFAOYSA-N 2-ethylhexyl dihydrogen phosphate Chemical compound CCCCC(CC)COP(O)(O)=O LJKDOMVGKKPJBH-UHFFFAOYSA-N 0.000 claims 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 claims 2
- 239000000706 filtrate Substances 0.000 claims 2
- 125000002924 primary amino group Chemical class [H]N([H])* 0.000 claims 2
- 239000007787 solid Substances 0.000 claims 2
- 238000003756 stirring Methods 0.000 claims 2
- 238000005406 washing Methods 0.000 claims 2
- 239000002699 waste material Substances 0.000 claims 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims 1
- 239000003513 alkali Substances 0.000 claims 1
- 238000001816 cooling Methods 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 238000005342 ion exchange Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229910017604 nitric acid Inorganic materials 0.000 claims 1
- 238000005554 pickling Methods 0.000 claims 1
- 239000012857 radioactive material Substances 0.000 claims 1
- 239000002901 radioactive waste Substances 0.000 claims 1
- -1 rare earth chloride Chemical class 0.000 claims 1
- 238000004064 recycling Methods 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- SFKTYEXKZXBQRQ-UHFFFAOYSA-J thorium(4+);tetrahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[Th+4] SFKTYEXKZXBQRQ-UHFFFAOYSA-J 0.000 claims 1
- 229910052845 zircon Inorganic materials 0.000 claims 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims 1
Classifications
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- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/065—Nitric acids or salts thereof
-
- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
-
- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/42—Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
-
- 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
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/14—Obtaining zirconium or hafnium
-
- 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
- C22B59/00—Obtaining rare earth metals
-
- 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
-
- 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
-
- 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
- C22B60/0239—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes by leaching using acidic solutions or liquors nitric acid containing ion as active agent
-
- 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
- C22B60/026—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes treatment or purification of solutions or of liquors or of slurries liquid-liquid extraction with or without dissolution in organic solvents
-
- 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
- C22B60/0265—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes treatment or purification of solutions or of liquors or of slurries extraction by solid resins
-
- 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
- C22B60/0291—Obtaining thorium, uranium, or other actinides obtaining thorium
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the invention relates to a method for separating and recovering radioactive waste residue, in particular to a method for separating and recovering monazite slag, in particular to separating and recovering valuable elements uranium, thorium, rare earth and monazite from monazite slag.
- Method of mineral and zircon concentrate is provided.
- Monazite is one of the four major raw materials for China's rare earth industry. Monazite is mainly found in the coastal sand mines of Guangdong, Guangxi and Hainan Island. It is mainly associated with minerals such as zirconium and titanium. There are also monazite mines in the interior. For example, there is a large monolithic mine in the mouth of Yueyang, Hunan. Monazite belongs to light rare earth ore.
- the current production process is: The monazite concentrate is decomposed by alkali, extracting useful rare earth and phosphorus from the liquid, and the remaining solid product contains about 16 ⁇ 28% of Th0 2 , 0.6 ⁇ 1.2% of 11 and 9 ⁇ 20% of REO, as well as useful minerals such as monazite, zircon, rutile, etc. that are not decomposed. Because the most abundant strontium did not find a large-scale use, the recycling of these resources was not taken seriously, and it became a bunch of headaches of radioactive waste, which was not conducive to environmental management, and also became a rare earth plant living with monazite as raw material. Develop insurmountable obstacles. At present, there are about 50,000 tons of solitary gravel in the country, and nearly 10,000 tons of slag is produced every year. If the management is not standardized, it will cause great harm to the environment.
- the object of the present invention is:
- a separation and recovery method for monazed slag in which a valuable component of monazite is separated into a liquid phase (a filtrate containing uranium, thorium, and rare earth) and a solid phase (filter residue) from monazite slag.
- a method for separating and recycling monazite residue which comprises the following steps:
- the mixed aqueous solution contains uranium, cerium and a rare earth element, and the secondary slag is a filter residue containing monazite, zircon and residual uranium, cerium, and rare earth compounds.
- the siphon supernatant is combined with the supernatant containing uranium, thorium and rare earth elements obtained in step (1) in.
- the above-mentioned cooling standing time is preferably 4 hours or longer, more preferably 4 to 8 hours.
- the inorganic strong acid is preferably sulfuric acid or nitric acid.
- the mixed aqueous solution containing uranium, cerium and rare earth elements obtained in the step (3) is subjected to extraction of valuable components:
- A. Lifting uranium Extracting uranium from the mixed aqueous solution obtained in step (3) by ion exchange adsorption method to obtain solid sodium diuranate and a solution containing cerium and rare earth;
- the waste acid solution produced in the step C is preferably returned to the step ⁇ for the acid immersion liquid.
- the secondary slag is subjected to beneficiation to obtain a monazite concentrate, a zircon concentrate and a tailings, and the tailings are alkali-decomposed and sent to the monazite.
- the concentrate treatment process, the monazite slag produced by the monazite concentrate treatment process is sent to the step (1) to realize the radioactive material.
- the closed loop recycling is carried out, and no radioactive waste is discharged in the production process.
- the beneficiation is a prior art, and the beneficiation step of the monazite slag is the same, except that the raw materials for the beneficiation are different, and the secondary slag in the step (3) is replaced by a beneficiation.
- the specific steps are as follows: the secondary slag is re-elected (shake Bed or centrifugal concentrator) sorting out heavy ore (mineral sand) and tailings (compound), heavy ore is re-selected (centrifugal concentrator, shaker) to eliminate gangue in heavy ore, and then magnetic separation-electrical selection , zircon and monazite concentrates are sorted.
- the invention separates and extracts U, Th and RE by leaching, refining uranium-P204 extracting ⁇ N1923, extracting RE ⁇ removing liquid, and returning to the leaching combination process, and the whole combined process solution is continuously and smoothly carried out without arranging, simplifying the process.
- Process while reducing wastewater discharge.
- the remaining liquid after the extraction of U is extracted by P204, and the combined process of N1923 is used to obtain Th and RE products.
- the raffinate (waste acid) can be returned to the acid leaching process because it contains very low impurities, which reduces the discharge of waste water, saves the amount of acid leaching acid and new water, reduces the cost of treating wastewater, and reduces production. cost.
- the conventional method is to first extract Th with N1923 and then extract RE with P204.
- the disadvantage is that with the expensive N1923 to extract a large amount of Th, the extractant is expensive and the cost is not cost effective.
- P204 to extract rare earth.
- the cost of extractant is reduced a little, the residual liquid has low rare earth content, high acidity, need to reduce acidity, and can be extracted. It is necessary to consume acidity (the problem of extracting rare earth with N1923 is not the problem).
- the acid solution having a reduced acidity after extraction of the rare earth by P204 has a low acidity and cannot be returned for acid leaching, and can only be discharged after treatment, thereby increasing the discharge of wastewater and the cost of treating wastewater. It is even more difficult to save acid and raw water in the acid leaching process.
- Monza slag is chemically treated to extract valuable elements such as uranium, thorium and rare earths.
- the ore dressing method is used to recover valuable minerals such as monazite and zircon which are not decomposed in the slag. No radioactive waste water or waste residue is discharged. A green cycle is achieved.
- the specific principles are as follows:
- the invention adopts a low acid and low temperature leaching process to selectively leaching the decomposed valuable elements uranium, thorium and rare earth compounds in the monazite slag into the solution, so that no colloidal solution and slag are produced in the solution.
- the colloidal compound does not appear, and the liquid phase and the solid phase are easily separated, and a clear aqueous solution containing uranium, thorium, and rare earth and a secondary slag are obtained.
- the acid-soluble compound in the monazite residue is sufficiently dissolved, and the dissolution of other poorly soluble compounds is minimized, so that the solid-liquid separation of the acid-soluble slag can be smoothly performed.
- the acid-soluble reaction of Th and RE is more sufficient than other impurities (Zr, Ti, Fe, Si, etc.).
- P204 has different ion extraction capabilities, and uses the difference in extraction capacity to extract by Th solvent and achieve the purpose of Th and RE separation.
- the rare earth in the raw material is extracted by a primary amine and separated from the impurities (
- the secondary slag is beneficiated by the beneficiation process to obtain monazite, zircon and tailings. After the alkali decomposition and acid dissolution of the tailings by the alkali decomposition process, the tailings are returned to the main process of the decomposition of monazite.
- the waste acid water is degreased and used to leach monazite.
- Alkali anti-mother liquor alkali water can be returned to the base after the alkalinity.
- the wastewater to be discharged has a large amount of sulfate (so 4 2 — ), and caustic soda is used as a neutralizing agent. It also provides convenience for extracting valuable elements from these wastes in the future.
- the acid-containing wastewater is first degreased, and then the anion-cation resin is exchanged and adsorbed once to ensure that the drainage reaches the standard, and then the neutralization treatment is performed.
- the process comprehensively recovers uranium, thorium, rare earth, zircon and monazite, and emits no radioactive waste water or waste residue.
- the process is connected to the monazite decomposition process, which can greatly reduce production costs and investment costs. Has considerable economic benefits.
- the secondary slag is beneficiated and alkali decomposed, and the closed loop recycling of uranium, thorium and rare earth is realized; after the ore dressing is decomposed by alkali decomposition, the solution returns to the main decomposition principal of monazite concentrate.
- the zirconia tailings produced by the recovery of uranium, thorium and rare earths can be sold directly as zircon concentrate. The discharge of radioactive waste is eliminated, and the comprehensive recovery rate of U, Th and RE is improved. 4.
- the invention is further illustrated by the following examples.
- the percentages stated in the examples all refer to the mass percentage.
- the analysis method of rare earth and strontium adopts GB/T18114.1-2000, and the analytical method of uranium adopts EJ/T266 standard, and is determined by ferrous sulfate reduction/potassium dichromate oxidation titration.
- a method for separating and recycling monazite residue which comprises the following steps:
- the filter residue is washed with water, and the water is stopped when the pH value of the filtrate is 3, the filter residue is dried, and the filtrate is washed and sent to a storage tank to obtain a clear aqueous solution containing uranium, thorium and rare earth, stirred and mixed, and sampled and analyzed (rare earth and lanthanum).
- the analytical method is GB/T18114.1--2000; the analytical method of uranium adopts EJ/T266 standard, ferrous sulfate reduction/potassium dichromate oxidation titration), and the uranium leaching rate is calculated to be 78%.
- the leaching rate is 80% and the rare earth leaching rate is 45%.
- Resin treatment Take strong alkaline anion resin, wash it with pure water until no pigment, soak it in pure water for 24h, stir it regularly; soak it with 5% NaOH for 24h, stir it regularly, wash away the alkali-soluble impurities in the resin, use pure Washed to neutral; soaked in 5% H 2 S0 4 for 24 h, stirring constantly, washing away the acid-soluble impurities in the resin, and washing to neutral with pure water.
- the resin was soaked with 0.15 mol/L of H 2 SO 4 to acidity, and the resin was separately charged into two series of columns ( ⁇ 600 ⁇ , length 1500 mm), and the resin height was 1100 mm.
- Resin adsorption The clear aqueous solution containing uranium, thorium and rare earth obtained in step (3) flows through the resin from the storage tank at a linear velocity of 3 mm/min, and the uranium is adsorbed to the resin to be saturated.
- the effluent is rare earth-containing and antimony-containing. In addition to uranium.
- Washing To wash the free rare earth and lanthanum in the resin, wash the resin with 0.25mol/L H 2 SO 4 , and analyze the effluent and analyze the ruthenium and rare earth. The washing liquid is combined with the upper effluent, and the extract is separated and extracted. use.
- Leaching prepare 1 mol/L NaCl plus 5% H 2 S0 4 solution (ie, the eluent is a mixed solution of NaCl and H 2 S0 4 , the concentration of NaCl in the mixed solution is 1 mol/L, H 2 S0 4 The mass concentration is 5%.) Rinse the uranium in the resin until the eluent is not yellow.
- the extracting agent is an organic reagent composed of a mixture of bis(2-ethylhexylphosphoric acid) and kerosene, that is, 25% to 35% of P204 is used (the mass content or volume content of P204 in the organic reagent is 25). % ⁇ 35 %), the rest is kerosene, and the organic reagent is stirred and mixed.
- extracting rare earth extracting rare earth from the above rare earth solution by extraction method, obtaining rare earth chloride solution and waste acid solution;
- the extracting agent is an organic reagent prepared by mixing primary amine, sec-octanol and kerosene as an extracting agent, that is, using 5% to 15% of N1923 (N1923 has a mass content or volume content of 25 in an organic reagent. % ⁇ 35 %), octanol 3% to 6% (the mass content or volume content of octanol in the organic reagent is 3% ⁇ 6 %), the rest is kerosene, and the organic reagent is stirred and mixed.
- the present invention returns the waste acid solution, i.e., the raffinate, produced in the step (4) to the step ⁇ as an acid immersion liquid.
- the secondary slag treatment obtained in the step (3) of the first embodiment is subjected to beneficiation to obtain a monazite concentrate, a zircon concentrate and a tailings, and the tailings are alkali-decomposed and then fed.
- the treatment of the monazite concentrate treatment process, the monazite slag produced by the monazite concentrate treatment process is sent to the step (1) for treatment, thereby achieving closed loop recycling of the radioactive material, and no radioactive waste residue is discharged in the production process.
- lOOKg filter residue is re-selected, electrified, and magnetically selected to obtain 11.5 Kg of monazite concentrate with a grade of 60%, 32.5 Kg of 60% zircon concentrate, 54 kg of tailings, and a monazite concentrate for single residence.
- the concentrate concentrate treatment process, zircon concentrate can be directly sold.
- the monazite slag produced by the monazite concentrate treatment process is sent to the step (1) for treatment, thereby achieving closed loop recycling of the radioactive material, and no radioactive waste slag is discharged in the production process.
- the tailings are decomposed by alkali, washed with water, acid-soluble and filtered, and the filtrate and slag containing uranium, thorium and rare earth are obtained.
- the filtrate is returned to the monazite concentrate treatment process to realize closed loop; 11kg of filter residue is zircon (through The phase analysis was carried out, which contained 91.52% zircon, which can be directly sold.
- the siphon supernatant was combined with the supernatant obtained in step (1) to obtain a solution containing valuable elements of uranium, thorium and rare earth, solid phase retention In the reaction kettle.
- the mixture is heated to 40 ° C ⁇ 100 ° C, stirred for 0.5 hour ⁇ 1 hour, cooled and clarified for 4 hours ⁇ 8 hours, siphon supernatant and the supernatant obtained in step (1)
- the solution is combined to obtain a valuable element containing uranium, thorium and rare earth.
- the siphon supernatant was combined with the supernatant obtained in step (1) to obtain a solution containing valuable elements of uranium, thorium and rare earth, solid phase retention reaction In the kettle.
- the secondary slag after the dry pressing in the step (3) is treated: the lOOKg secondary slag is subjected to re-election, electric selection, magnetic separation to obtain a vitreous concentrate of 60% grade, 12.4 Kg, 60% zircon fine.
- the mine is 34.8Kg, and the tailings are 52kg.
- the monazite concentrate is sent to the monazite concentrate treatment process, and the zircon concentrate can be directly sold.
- the monazite concentrate treatment process produces the monazite residue and sends it to the step (1). In this way, the radioactive material is closed and recycled, and no radioactive waste is discharged in the production process.
- the tailings are decomposed by alkali, washed with water, acid-soluble and filtered, and the filtrate and slag containing uranium, thorium and rare earth are obtained.
- the filtrate is returned to the monazite concentrate treatment process to realize closed circuit cycle.
- the produced filter residue is 11.3 kg of zircon ( By doing phase analysis, which contains 91.52% zircon, it can be directly sold.
- the siphon supernatant is combined with the supernatant obtained in step (1) to obtain a solution containing valuable elements of uranium, thorium and rare earth, solid phase Leave in the reaction kettle.
- the filter residue is washed with water, and the water is stopped when the pH value of the filtrate is 2.5, the filter residue is dried, and the filtrate is washed and sent to a storage tank to obtain a clear aqueous solution containing uranium, thorium and rare earth, and stirred and mixed.
- Sampling analysis showed that the leaching rate of uranium was 83.5 %, the leaching rate of strontium was 87.2%, and the leaching rate of rare earth was 61.0%.
- the filter residue after the press-drying in the step (3) is treated: the lOOKg filter residue is subjected to re-election, electro-selection, and magnetic separation to obtain a gypsum concentrate of 60% of 12.7 Kg and a 60% zircon concentrate of 36.7 Kg. 49.6kg of tailings, the monazite concentrate is sent to the monazite concentrate treatment process, and the zircon concentrate can be directly sold.
- the monazite slag produced by the monastic concentrate treatment process is sent to the step (1) for treatment, so that the radioactive material is closed and recycled, and no radioactive waste is discharged in the production process.
- the tailings are decomposed by alkali, washed with water, acid-soluble and filtered, and the filtrate and slag containing uranium, thorium and rare earth are obtained.
- the filtrate is returned to the monazite concentrate treatment process to realize closed loop; the produced filter residue is 11.5kg of zircon ( By doing phase analysis, which contains 91.52% zircon, it can be directly sold.
- the siphon supernatant was combined with the supernatant obtained in step (1) to obtain a solution containing valuable elements of uranium, thorium and rare earth, solid phase retention In the reaction kettle.
- the filter residue is washed with water, and the water is stopped when the pH value of the filtrate is 2.0, the filter residue is dried, and the filtrate is washed and sent to a storage tank to obtain a clear aqueous solution containing uranium, thorium and rare earth, and stirred and mixed.
- Sampling analysis showed that the leaching rate of uranium was 85.5 %, the leaching rate of strontium was 88.0%, and the leaching rate of rare earth was 65.5 %.
- the filter residue after the dry pressing in the step (3) is treated: the lOOKg filter residue is subjected to re-election, electric selection and magnetic separation to obtain 12.9 Kg of a monazite concentrate having a grade of 60%, and 36.4 Kg of a 60% zircon concentrate.
- the tailings mine is 49.3kg, and the monazite concentrate is sent to the monazite concentrate treatment process.
- the zircon concentrate can be directly sold.
- the monazite slag produced by the monastic concentrate treatment process is sent to the step (1) for treatment, so that the radioactive material is closed and recycled, and no radioactive waste is discharged in the production process.
- the tailings are decomposed by alkali decomposition, washed with water, acid-soluble and filtered, and the filtrate and slag containing uranium, thorium and rare earth are obtained.
- the filtrate is returned to the monazite concentrate treatment process to realize closed circuit circulation.
- the produced filter residue is 11.8 kg of zircon ( By doing phase analysis, which contains 91.52% zircon, it can be directly sold.
- the siphon supernatant was combined with the supernatant obtained in step (1) to obtain a solution containing valuable elements of uranium, thorium and rare earth, solid phase retention In the reaction kettle.
- the siphon supernatant was combined with the supernatant obtained in step (1) to obtain a solution containing valuable elements of uranium, thorium and rare earth, solid phase retention In the reaction kettle.
- the filter is washed with water, and the water is stopped when the pH value of the filtrate is 3.0, and the filter is dried.
- the slag and the washing filtrate are sent to the storage tank to obtain a clear aqueous solution containing uranium, thorium and rare earth.
- the mixture is stirred and mixed, and sampled and analyzed.
- the leaching rate of uranium is 88.5 %, and the leaching rate of lanthanum is 89.0%.
- the leaching rate was 67.0%.
- the filter residue after the pressure drying in the step (3) is treated: the lOOKg filter residue is subjected to re-election, electro-selection, magnetic separation to obtain a monochali concentrate of 13.0 Kg with a grade of 60%, and a zircon concentrate of 36.8 Kg of 60%. 49kg of tailings, the monazite concentrate is sent to the monazite concentrate treatment process, and the zircon concentrate can be directly sold.
- the monazite concentrate treatment process produces the monazite residue and sends it to the step (1). In this way, the radioactive material is closed and recycled, and no radioactive waste is discharged in the production process.
- the tailings are decomposed by alkali, washed with water, acid-soluble and filtered, and the filtrate and slag containing uranium, thorium and rare earth are obtained.
- the filtrate is returned to the monazite concentrate treatment process to realize closed loop; the produced filter residue is 11.9kg of zircon ( By doing phase analysis, which contains 91.52% zircon, it can be directly sold.
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AU2013351773A AU2013351773B2 (en) | 2012-11-27 | 2013-07-24 | Monazite ballast separation and recovery method |
US14/647,368 US9657369B2 (en) | 2012-11-27 | 2013-07-24 | Monazite ballast separation and recovery method |
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CN201210489704.0 | 2012-11-27 | ||
CN201210489704.0A CN103014359B (zh) | 2012-11-27 | 2012-11-27 | 独居石渣的分离回收方法 |
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US (1) | US9657369B2 (zh) |
CN (1) | CN103014359B (zh) |
AU (1) | AU2013351773B2 (zh) |
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WO (1) | WO2014082461A1 (zh) |
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CN111575485A (zh) * | 2020-05-09 | 2020-08-25 | 湛江市红日稀土有限公司 | 一种降低稀土渣放射性的回收处理方法 |
CN115818694A (zh) * | 2022-12-09 | 2023-03-21 | 包头稀土研究院 | 独居石的处理方法 |
CN115818694B (zh) * | 2022-12-09 | 2024-01-23 | 包头稀土研究院 | 独居石的处理方法 |
CN116590547A (zh) * | 2023-05-29 | 2023-08-15 | 山东域潇有色新材料有限公司 | 一种独居石矿粉碱法分解溶出装置及工艺 |
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MY170254A (en) | 2019-07-13 |
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US9657369B2 (en) | 2017-05-23 |
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